SERVICE MANUAL COMPOSITE VIDEO CRT DISPLAY MONITORS DS3000, 3003 SERIES* (12-INCH} DS4000, 4003 SERIES* (15-INCH} - VP39 -

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1 GENERAL NFORMATON TL:! CRT display moniors described herein are fully ransisorized (excep CRT) and applicable for displaying alphanumeric characers. The DS3000, DS3003 series moniors use a 12-inch CRT, and he D54000, D54003 series moniors use a 15-inch CRT. Each monior acceps and operaes from a V p.p composie video signal (whie posiive). A universal power ransformer permis operaing his se1 ies of moniors from 120, 220, or 240 vols@ 50/60Hz. A buil-in regulaed power supply provides operaing volages of +24V, +13V and +5V. Signal inpu connecions for a monior may be made hrough an assormen of connecors using shielded single conducor cable. n addiion, some models may uilize one or wo BNC recepacles on he rear of he chassis. AC power o he monior is inerconneced via a separae connecor, which may also vary beween models. Depending on he monior model number, here may be J J a maximum of hree (3) circui cards presen.. Nor.)i._, )11. Differenial Amp ifler circui card (opional). ',,. /)i,, r;2. Composie Video c1rcu1 card (sandard) 3. Monior circui card (sandard) \..,11The opional Differenial Amp ifier circui card, when / presen, receives he incoming composie video signal. ) s circuiry consiss of a wo-sage differenial amp ifier, c": and a one-sage consan curren source. Oupu from h is oj" c'"' circui card, o he Composie Video circui card, is com- ) 11 : f posie video (whie posiive). SERVCE MANUAL - VP39 - COMPOSTE VDEO CRT DSPLAY MONTORS DS3000, 3003 SERES* (12-NCH} DS4000, 4003 SERES* (15-NCH} * SEE MODEL COMPLEMENT TABLE/PAGE 4 The Composie Video circui card can receive he composie video signal direc from an exernal source, or from he (opional) Differenial Amplifier circui card (when presen). Circuiry consiss of a one-sage composie video amplifier, wo sages of video pre-driver, one sage of composie sync separaor, and an (opional) one-sage composie blanking amplifier (when presen). Oupu from his circui card, o he monior circui card, is separae (TTL level) horizonal /verical sync and video. TTL level inpus o he monior circui card are received from he Composie Video circui card, which is soldered ino he Monior circui card. Circuiry consiss of wo sages for video amp ificaion, one inegraed circui for verical sync/deflecion processing, five sages for horizonal sync/deflec ion processing, and a hree sage regu aed power supply. All models also conain dynamic focus ing and spo kill circuiry on he monior circui card. Model DS4000, DS4003 Series (15" CRT) Model DS3000, DS3003 Series (12" CRT) ( MOTOROLA NC. Display Sysems 1299 E. Algonquin Road, Schaumburg, L (312) MANUAL VP39 9/81 PART NO. NC. 1981

2 i l, SAFETY WARNNG CAUTON: NO WORK SHOULD BE ATTEMPTED ON AN EXPOSED MONTOR CHASSS BY ANYONE NOT FAMLAR WTH SERVCNG PROCEDURES AND PRECAUTONS. 1. SAFETY PROCEDURES should be developed by habi so ha when he echnician is rushed wih re pair work, he auomaically akes precauions. 2. A GOOD PRACTCE, when working on any uni, is o firs ground he chassis and o use only one hand when esing circuiry. This will avoid he pos sibiliy of carelessly puing one hand on chassis or ground and he oher on an elecrical connecion which could cause a severe elecrical shock. 3. Exreme care should be used in HANDLNG THE PCTURE TUBE as rough handling may cause i o implode due o amospheric pressure ( lbs. per sq. in.). Do no nick or scrach glass or subjec i o any undue pressure in removal or insallaion. When handling, safey goggles and heavy gloves should be worn for proecion. Discharge picure ube by shoring he anode connecion o chassis ground (no cabine or oher mouning pars). When discharging, go from ground o anode or use a well insulaed piere of wire. When servicing or repairing he monior, if he cahode ray ube is replaced by a ype of ube oher han ha specified under he Moorola Par Number as original equipmen in his Service Manual. hen avoid prolonged exposure a close range o un shielded areas of he cahode ray ube. Possible danger of personal injury from unnecessary exposure o X-ray radiaion may resul. 4. An SOLATON TRANSFORMER should always be used during he servicing of a uni whose chassis is conneced o one side of he power line. Use a rans former of adequae power raing as his proecs he serviceman from accidens resuling in personal injury from elecrical shocks. will also proec he chassis and is componens from being damaged by accidenal shors of he circuiry ha may be inadverenly inroduced during he service operaion. 5. Always REPLACE PROTECTVE DEVCES, such as fishpaper, isolaion resisors and capaciors and shields afer working on he uni. 6. f he HGH VOLTAGE is adjusable, i should always be ADJUSTEJJ o he level recommended by he manufacurer. f he volage is increased above he normal seing, exposure o unnecessary X-ray radiaion could resul. High volage can accuraely be measured wih a high volage meer conneced from he anode lead o chassis. 7. BEFORE RETURNNG A SERVCED UNT, he service echnician mus horoughly es he uni o be cerain ha i is compleely safe o operae wihou danger of elecrical shock. DO NOT USE A LNE SOLATON TRANSFORMER WHEN MAKNG THS TEST. n addiion o pracicing he basic and fundamenal elecrical safey rules, he following es, which is relaed o he minimum safey requiremens of he Underwriers Laboraories should be performed by he service echnician before any uni which has been serviced is reurned OHM VOLT (QR HGHER) AC VOL TME TEA NOTES 1 REPEAT EACH CHECK WTH THE LNE COAD REVERSED N THE POWER OUTLET 2 METER READNG MUST NOT EXCEED 7' VOL TS AC "HOT LEAD OF METER TO EACH EXPOSED PART OF CABNET AS WELL AS THE: CABNET GROUND LCAD OF METER TO ANY EARTH Gi10UND SUCH AS A COLD WA TE A PPE ""' Volmeer Hook-up for Safey Check A 1000 ohm per vol AC volmeer is prepared by shuning i wih a 1500 ohm, 10 wa resisor. The safey es is made by conacing one meer probe o any porion of he uni exposed o he operaor such as he cabine rim, hardware, conrols, knobs, ec., while he oher probe is held in conac wih a good "earh" ground such as a cold waer pipe. The AC volage indicaed by he meer may no exceed 7'12 vols. A reading exceeding 7'h vols indicaes ha a poenially dangerous leakage pah exiss beween he exposed porion of he uni and "earh" ground. Such a uni represens a poenially serious shock hazard o he operaor. The above es should be repeaed wih he power plug reversed, when applicable. NEVER RETURN A MONTOR which does no pass he safey es unil he faul has been locaed and correced. 2

3 J DSPLAY DS3000-0$ " diagonal viewable area 11 o0 deflecion angle 3 X 4 aspec raio 12" diagonal measure 15" measured diagonally, P4 phosphor sandard (oher EA phosphors available) T band U.L. implosion proecion Direc ech and PPG opional Sandard Display Size: (DS3000) 8'.5 x 6.0, (054000) 10.0x7.5 Capable of displaying over 3400 characers. VDEO PERFORMANCE Resoluion: 1200 lines cener, 950 lines corners (P4 phosphor) Bandwidh: wihin 3 db, 10 Hz o 30 MHz is ypical. SYNCHRONZATON Horizonal: khz :: 500 Sandard, 18.7 khz :!:.500 opional Verical: 47 o 63 Hz SPECFCATONS* Horizonal Blanking: 11.uSec minimum (for scanning frequency of 15.7 khz). 10.uSec minimum (a 18.7 khz). Time includes rerace and delay. Verical Blanking: 800.uSec (includes rerace and video delay) NPUT SGNAL Composie Video: posiive whie. inpu erminaion 75 ohms:: 5%, V PP (RS170 compaible.) POWER NPUT 120/240V AC ( ), 50/60 Hz, 65VA max. 24V DC opional NTERCONNECT TO CUSTOMER SYSTEM BNC ype connecor(s) Oher ypes opional CONTROLS nernal: Horizonal size, horizonal video cenering, brighness, focus, verical hold. verical size, verical lineariy. (All conrols ad1usable from op or back of uni). Exernal: Brighness and conras las operaor conrols). GEOMETRY (Pin and Barrel} Sides equal less han 1 % of heigh Top and boom equal less han 1 " of widh. LNEARTY Characer heigh or widh will no vary :: 7% from he average characer size. Adjacen characers wil no vary more han 5%. ENVRONMENT Operaing Temperaure: o 0 o +55 c Sorage Temperaure: -40 C o +65 C Noe: CRT's wih bonded eched panels should no be subjeced o sorage or operaing emperaures above 50 C Operaing Aliude: 10,000 f. max. Designed o comply wih DHHS Radiaion Performance Sandards, U.L. and C.S.A. specificaions. *n a coninual effor o upgrade our sandard producs as new echnological advances are made, spec1f1ca1ons are sub1ec o change wihou no1cp - MODEL NUMBER - (Noe 11 \ DS3000, _55 D _56 > , _57 < -'"' , ll er c , z - er o _65 ; , , , , , _56 > , _57 < -'"' , _58 ll er -0 c , z er o , DS4000, _66 DS4000, ,_DS4000, _ _69 MODEL COMPLEMENT TABLE COMPOSTE COMPOSTE VDEO N/ DFFERENTAL VDEO BLANKNG VDEO OUT AMPLFER CRCUT AMPLFER (LOOP THRU & CRCUT CARD CRCUT 75 OHM TERM. SW. CARD (Noe 2) x x x x x x x x x x - :;-= _,,_ x - x x x x x x x x x NOTES: 1. Th ii column will conain an alpha or numeric designaor, which denoes CRT Phosphor_ will vary beween models. 2. Opional circui on composie video circui card (when presen). 4

4 ONTOR CRCUT CARD ower Supply (Refer o Figure 19) The power supply is a ransformer operaed, full wave, egulaed series pass circui ha mainains a consan upu volage wih ine inpu variaions of :_ 12.5%. De,ending on how connecor S1 is wired, operaion from 20, 220 or 240 vols, 50/60 Hz is possible. negraed ircui C101 is he reference amplifier, ransisor 0102 ; he regulaed oupu driver, and 0101 is he series pass ransisor. 'he oupu volage, +24V, appears a he collecor of The +24V is used on he monior circui card, and is lso roued o he composie video circui card and differ nial amplifier circui card via pin 7 of P2. This volage ; divided beween R 106, R 107 and R 109. Resisor R 108 mis he range of R 107. The volage appearing on he rm of poeniomeer R 107 (24 V ADJ. conrol) is he eference inpu o he invering inpu (-) of reference mplifier C101. emperaure compensaed zener diode, V R 101, esabishes a fixed reference volage a he non-invering inpu +) o C101. Resisors Rl 10 and R111 and diode D105 >rovide bias curren for V R 101. The juncion of R 110 and 111 is he +13V source for he horizonal oscillaor, C402. Regulaor VR101 is also he 5 vol source for he nonior circuiry. Operaing volage for C101 is derived rom resisor nework R 101 and R 105. l.n increase in oupu curren will cause a decrease in ouiu volage due o inernal supply impedance. This will :ause he volage a he base of 0102 o become more iosiive via he invering amplifier C101. Wih he base nore posiive, 0102 will conduc more, increasing is :ollecor curren. This increases he base curren in fhe resul is increased oupu curren from 0101, raising :he oupu volage and mainaining he proper oupu 1olage level. Elecrolyic capacior C101, secion "A", filers he bridge recifier (D101-D104) oupu, while secion "B" provides addiional filering of he +24V regulaor oupu. Capacior C103 filers he +5 vol source. R102 is he load resisor for Resisors R 103, R 104 bias Capacior C102 increases regulaion a high frequencies for improved ransien response. Video Amplifier (Refer o Figure 20) The linear video amplifier consiss of wo sages, 0201 and 0202, which are conneced in a cascode configuraion. This common emier-common base arrangemen grealy reduces he effec of Miller capaciy (when compared o a convenional single ransisor video amp i ier /oupu sage). A TL compaible (whie posiive) video signal, approximaely vols P-P, is DC coupled o he base of 0201 via R202. R203 and C201 provide high frequency compensaion o mainain a fla response when 0201 and 0202 conduc. During a no-signal condiion, video driver ransisor 0201 is off. A he same ime, video oupu ransisor 0202 is base biased a 6.0V by R217 and R218. When a video signal is applied o he base of 0201, i urns on, allowing 0202 o conduc. The resulan oupu is developed across collecor load resisor R210 and DC coupled o he CRT cahode via peaking coil L201 and resisor R is proeced from CRT arcing by a spark gap buil ino he CRT socke, and R211 furher isolaes 0202 from ransciens. Capacior C204 shors video frequency signals from he base of 0202 o ground. Peaking coil L201 increases he high frequency response of he video amplifier. Capacior C205 provides filering of he +70V supply, while C206 is a high frequency AC bypass capacior o ground. P2 FlOl Q 1 Q l 767S 24V REGLATOR Rile 100 2W <O , ClOlA + 0 isoo R!Ol 300 RlOS l.bk l/2w R;:1...,. S.l\. lns23!b Q+ lee +!03 Figure 19. AC Power npu/regulaed Power Supply Oupu 6

5 J +70V 2W ANODE HGH l/ol TAGE FROM T '., DEO :::: 1 O' - cj u p T 1 :?.5 4.0V P-?, :X "-.o- E-6-, ---o POSl"TJ El 17 Figure 20. Video and Spo Kill Circuis c20l_.oos 1 lp FROM FROM G4\FOCUSl G:Z VOLTAGE VOLTAGE SOURCE SOURCE Spo Kill (Refer o Figure 20) When power is removed from he monior, he hori zonal and verical scans collapse and a brigh spo is lef ha will burn a spo in he phosphor screen unless pre vened from doing so. When he monior is urned off, he decrease in he 24V supply volage is coupled hrough capacior C202 and resisor R206 o pin 1 of C201 A. This TTL inpu is normally held in he high sae by resisor R207. The falling 24V supply swiches C201A o he low sae a pin 1, which is invered o a high a pin 2 of C201A; hen in vered o a low again by C201 F a pin 12. The open collecor oupu of C201 F, now in he low sae (conduc ing), pulls R209 o ground o become he emier resisor of Wih 6.0 vols on is base, 0202 sauraes. The resuling low collecor volage on 0202 is coupled o he CRT cahode causing i o conduc heavily. The large cahode curren in he CRT discharges he second anode during scan collapse. The second anode is compleely dis charged before he scan currens collapse compleely so ha a spo can no form. Verical Scan (Refer o Figure 21) Negaive-going TTL level pulses pass hrough resisor R301 and proecive diodes D301 and D302 o C201 B. The inpu o C201 B acceps, hrough jumper JU302, negaive verical sync. Oupu pulses from C201 E (pin 10) are differeniaed by capacior C301 and resior R306. Diode D303 couples only he negaive-going spikes from he differeniaor circui o he sync inpu of C301 (pin 8). R307 and R308 provide inpu curren imiing. The sync inpu (pin 8) performs several funcions. srips away any random noise ha may be presen on he inpu ine and condiions he verical pulses for processing. also convers he inpu volage pulses o curren o conrol he inernal oscillaor. The oscillaor generaes a non-symmerical square wave wih a shor duy cycle a he verical scan frequency (50 o 60 Hz). Componens R310, R311 and C304 deer mine he frequency. This square wave signal is applied o a ramp generaor whose slope and amp! iude is deermined by R312, R313, C305 and C306. The ramp volage signal is applied o a buffer sage which isolaes he ramp generaor from he oupu sages and reduces any loading effec on he previous sages. Componens R314, R316 and R315 reshape he ramp volage o make i exremely linear. The oupu signal from pin 4 ( C301) drives he verical deflecion coils direcly via coupling capacior C312. Componens R321 and C311 provide damping o preven any oscillaions in he oupu circui. R320, R322, R319, R318, R323, C310 and C308 provide AC and DC feed back for he oupu sage o mainain proper gain and lineariy. When he scan reaches he boom of he screen a sync pulse iniiaes rerace. To insure a quick reurn o he op of he screen he volage across he yoke is doubled during rerace o quickly discharge he yoke inducance. This volage doubling circui consiss of diode D304, cap acior C302 and a ransisor nework in C301. Capacior C314 provides addiional (exernal) compensaion for C301, pin 11. Resisor R325 (when presen) is used o up-cener he raser and video display. Posiive-going verical rae pulses(@ 25V P-P), from C301 3, are supplied o he composie blanking circui (when presen) on he composie video circui card.

6 J TH V(JT U[C.J,, ]06 S.6K.74, 8V P-P. Figure 21. Verical Processing/Scan Circui Horizonal Orin/Sync Delay and Regeneraor (Refer o Figure 221 Negaive-going horizonal rae sync is coupled o he inpu of C401 B hrough he proecive nework consising of resisor R401 and diodes D401 and D402. C401 B is a monosable mulivibraor wih is ime consan being esablished by resisor R403, HOR Z. DELAY conrol R402, and capacior C401. A posiive pulse appears a pin 13 of C401 B, he leading edge coinciden wih he seleced leading edge of horizonal sync and he raling edge deermined by he HORZ. DELAY conrol, R402. The falling edge of his pulse riggers C401A, anoher monosable mulivibraor, whose ime consan (esablished by R406 and C4031 regenerae a posiive pulse a pin 5 of C401 A. Pulse widh a his poin is approximaely equal o he inpu sync pulse. This pulse is invered and increased in ampliude o 24V P-P by C201D. Phase Deecor (Refer o Figure 22) The phase deecor consiss of wo diodes D403 and D404 in a keyed clamp c1rcu;,. s Juncion is o develop a conrol vo!age for svnchronizing he horizonal oscillaor wih he incoming sync pulses. Two inpus are required o generae he required oupu; one from he horizonal sync regeneraor C401 A, and one from he horizonal oupu circui, The required oupu mus be of he proper polariy and ampliude o correc phase differences beween he inpu horizonal sync pulses and he horizonal ime base.. Each pulse from he collecor of he horizonal oupu, 0402, is inegraed ino a sawooh by R411 and C405. Capacior C406 blocks DC from he collecor of The oupu ransisor of C201 D is normally a cu-oi and is collecor volage ress a approximaely 24 vols. Since C404 is conneced o he oupu of C201 D, i will charge up o he collecor volage. When a pulse urns on and sauraes he oupu of C201D, is collecor volage drops o near ground poenial. C404 will now discharge, coupling a negaive-going sync pulse o he cahodes of D403 and D404. This negaive poenial is sufficien o forward bias boh diodes o conduc and discharge any posiive or negaive charge on C405 o ground. n oher words, i clamps he volage on capacior C405 during sync pulse ime o approximaely zero vols. DRVE/SYNC r DELAY 1 +SV \\\ Figure 22. Horizonal Drive/Sync Delay, Sync Regeneraor and Phase Deecor Circuis FEEDBACK 1CROlwl -----COL:.. ECTOR OF HQ"11Z OuTPuT Q.\02 17 l

7 j A Horizonal Oscillaor/Driver (Refer o Figure 24) B c D OV :, ACAXS ' ov =:::s.-- - AC AXS : OV ">. '::::::::::i:" --:----ACAXS AEPC A negraed circui imer C402 operaes as an asable square wave oscillaor. s free running frequency is deermined by resisors R415, R416, and capacior C409. The phase deecor correcion volage is coupled hrough resisor R414 o pins 2 and 6 of C402 o vary he frequency of he oscillaor. A second inpu o C402, pin 5, allows conrol of he oscillaor free run frequency by means of R418, HORZ. HOLD conrol. The non-symmerical oupu of C402 (pin 3) 1s coupled o he horizonal driver ransisor, 0401, hrough C411 and curren limiing resisor R419. D405 proecs 0401 from reverse base-emier volage operaes as a swich o drive he horizonal oupu ransisor 0402 hrough ransformer T 401. T 401 is a volage sepdown ransformer o provide a low impedance drive o R421 is a curren limiing resisor for 0401 and C414 is an AC bypass capacior. R420 and C413 damp he ransformer o preven ringing when 0401 goes ino cuoff. Figure 23. Phase Synchronizaion Waveforms Horizonal Oupu (Refer o Figure 24) Wihou considering he sync pulses, he sawooh wave would cause curren flow ino capacior C405 when i is negaive, and ou of C405 when i is posiive. Since he sawooh is symmerical abou is AC axis, he charge and discharge currens of C405 are equal. C405 would herefore average a zero volage level. A sync pulse (waveform A, Figure 231, clamping he sawooh as i passes hrough is AC axis (waveform B, Figure 23), will no affec is posiive and negaive symmery. Therefore, he average volage on C405 would remain zero. However, if he horizonal ime base begins o lag, he sync pulse will clamp he sawooh o ground a a poin below is AC axis, resuling in a non-symmerical charge on C405. This clamping acion will cause he sawooh's AC axis o shif o a poin above he ground reference (waveform C, Figure 23). Therefore, mos of he sawooh's waveform is now above ground which will produce a posiive volage on C405. This is he correc polariy o cause he horizonal oscillaor o speed up o correc he phase lag. Likewise, if he horizonal ime base is leading he sync pulse, he sawooh will be clamped o ground a a poin above is AC axis. This clamping acion will cause he sawooh 's AC axis o shif o a poin below he ground reference (waveform D, Figure 23). Now mos of he sawooh's waveform is below ground, which will produce a negaive volage on C405. This is he correc polariy o cause he horizonal oscillaor o slow down. The volage level on C405 is dependen upon which poin of he sawooh is clamped. This also deermines how far is AC axis will shif above or below ground. R412, C407, R413 and C408 comprise he phase deecor filer. The bandpass of his filer is designed o provide correcion of horizonal oscillaor phase wihou ringing or huning. The secondary of T401 provides he required low drive impedance for Componens R422 and C415 form a ime consan for fas urn-off of The horizonal oupu ransisor, 0402, is simply a swich ha is urned on and off a he horizonal scan rae by he drive signal applied o is base. A sawooh curren hrough he deflecion coils is required o sweep he beam linearly across he CRT screen. The sweep begins a he cener of he CRT and sweeps o he righ. This happens when 0402 is urned on and is collecor volage drops o near zero. C419 begins discharging hrough he deflecion coils o deflec he beam o he righ edge of he CRT. A his ime, 0402 cus off and C419 ceases o supply curren o he deflecion coils. However, an induced volage appears across he deflecion coil as he magneic field collapses, and an oscillaion occurs beween he deflecion coils and C416. Dunng he firs hal cycle of his oscillaion, he induced volage 1s fel across he collecor of now cu off 0402, C416, and he primary of T 402, he fly back ransformer. This volage 1s sepped up by T402 and recified o produce he required high volage ha is applied o he 2nd anode o he CRT. The elecron beam is Jlso defleced o he lef edge of he CRT a his ime ljecause he collapsing magneic field o he deflecion coils reverses polariy. During he second half cycle of he deflecion coils/c416 oscillaion, he volage on he collecor of sill cu off 0402 becomes negaive. A his ime, camper diode 0406 becomes forward biased and begins conducion. The deflecion coil curren gradually decreases o zero during damper conducion allowing he beam o sweep linearly o he cener of he screen. 18

8 The horizonal rerace pulse charges C422 hrough D407 o provide operaing volage for G2 of he CRT. Momenary ransiens a he colleaor of 0402, should hey occur, are limied o he volage on C422 since D407 will conduc if he collecor volage exceeds his value. Coil L402 is a magneically biased Horiz. Lineariy coi ha shapes he deflecion curren for opimum race lineariy. Coil L401 is a series Horiz. Widh conrol. Componens R425 and C418, R424 and C417 are damping nework componens for he Horizonal Lineariy (L402) and Widh (L401) conrols. The 24 vol supply o he horizonal oupu is coupled hrough diode D409 o pin 3 of he ransformer, T402. Auoformer acion of he ransformer booss he effecive supply volage o he ransformer o he 70 vols appearing on pin 1 of T402. This volage is filered by C205 and provides he 70 vol source for he chassis. A capaciive divider, C421 and C420, and diode D408 provides a -70 vol supply for he CRT Gl elecrode. Posiive-going horizonal rae pulses (@400V P-P), from pin 3 of T402, are supplied o he composie blanking circui (when presen) on he composie video circui card. Dynamic Focus (Refer o Figure 24) Due o he geomery of a CRT, he elecron beam ravels a greaer disance when defleced o a corner as compared o he disance raveled a he cener of he CRT screen. As a resul of hese various disances raveled, opimum focus can be obained a only one poin. For general applicaions, an adequae adjusmen can be realized by seing he focus while viewing sme poin mid-way beween he cener of he CRT screen and a corner, hus opimizing he overall screen focus. When an applicaion requires a igher specificaion, one of he simples mehods for improvemen is o modulae he focus volage a a horizonal sweep rae. Now opimum focus volage is made variable on he horizonal axis of he CRT, which compensaes for he beam ravel along his axis. The AC componen of he focus volage is developed by sepping up he volage across capacior C419 via ransformer T 403. The linear curren ramp in he horizonal yoke winding, L 1 B, al so flows hrough capacior C419. The ramp is inegraed, he resul being a parabolic waveform. This parabola is coupled hrough capacior C424 and resisor R433 o he primary of ransformer T403. The approximaely 250V P-P parabola presen a pin 6 of T403 is superimposed on he DC volage from he FOCUS conrol, R429, via capacior C423. This mixed AC and DC volage resuls in a waveform of proper phase and ampliude, which is coupled hrough isolaing resisor R431 o he CRT focus anode. TO G2 Of CRT RED TO G4 Of CRT i B...,., ll 12'ff JO' HORlZ. OSCLLATOR ljv R415 JK + C410 +JJ\' Figure 24. Horizonal Oscillaor, Driver and Oupu Circuis, and Dynamic Focus Circui 19

9 l,! N N -COMPONENT SDE SHOWN- '---.,,,.,.,..,-,, -. ')!-' J.' 1 L ()'VERLA'!' Figure 27. Monior Circui Card Layou - Componen Side

10 TO CAT 21<0 ANODE HOlllZ. PULSE TO COMPOSTE VOEO CRCUT CAllO WHEN OPTONAL lll.anl<ng CRCUT S PRESENT -SOLDER SDE SHOWN- N w ( TOREMOTE BRGHTl<ESS R2!3 A, 14: :1 ). '' - 'i ii!ic CONNECTOR NOTUSEO VERT, PULSE TO COMPOSTE VDEO CRCUT CARO WHEN OPTONAL LANKNG CRCUT S PRESENT *LOCATED ON SOLDER SDE OF CRCUT CARO Figure 28. Monior Circui Card Layou - Solder Side r --1;:: """", , "':--.' i','"' 1 :}<<> ',, SOLDER SDE FOL OVERLAY OEPC DEPC-O479 0

11 ( ' 0 UJ c > UJ - Cl) 0 0 u -Cl) UJ er: UJ Cl) rh c > UJ...J u. LO co <r C") LO N LO N fg...j <r '.:) z <r Cl) er: 0 - z 0 > <r...j " - ;f Cl) % g; 0., c - er: u

12 ._._,.._'-"_......_ "' Composie Video Circui (Componen Descripion) n a brief heory of ircu1 cards 1n a yp1ca: UT CARD Ji is designed o mini Y be presen w:h he sm1ed hrough a long s a normal video signal 1ission line. Figure 168 d by hum a he rans ' differenial amplifier :onsan curren source ouples he signal from of The curren D506 deermines he 1ely 6 ma). nd hum componen are!so appear a is emier. o he emier of 0502 f he consan curren 1um componen a boh cause heir volages o uenly, he bias of he ce he composie video 11e r of 0502, he bias a he video rae wih a collecor as a "filered" s, R517 (75 ohms) is differenial amplifier omposie video signal. a Video Ou BNC re ich on he rear panel, nsead, Rl (75 ohms), which will be mouned h, SW1. Terminaing of he inpu when he eries receiving he same onior is he final uni, paciors C501 and C504 se of 0501 and , R513 and R508 are ors R502, R503, R and 0502 and, R505 sors. Resisors R506, nd C503 form a peaking nse of he amplifier a nework of R514 and A. NPUT VDEO SGNAL DSTORTED VDEO /,_m (--L--<>NEOUTENT 8. OUTPUT VDEO SGNAL Figure 16. npu and Oupu Waveforms of Long Transmission Line C505 isolae he incoming composie video signal from ground. COMPOSTE VDEO CRCUT CARD (See figure 18) Composie Video Circui (Signal Flow) A vol p.p composie video signal (whie posiive) is (AC) coupled by C601 o he base of Transisor 0601 serves wo funcions; i is an amplifier wih a gain of 2 and i isolaes (buffer) he video pre driver sages from he composie video signal source. Two oupus are derived from 0601; boh are composie video. From he collecor, invered composie video (sync posiive) is roued o he composie sync separaor, From he emier of 0601, composie video (whie posiive) is direc coupled o he CONTRAST conrol, R605, via P601 /5601; hen AC coupled by C602 o he base of he firs video pre-driver The seing of CONTRAST conrol R605 deer mines he overall ampliude of he composie video signal o be coupled o Transisors 0602 and 0603 (video pre-drivers No. 1 and No. 2 respecively) are complemenary, direc-coupled, common emier amplifiers; hey provide a volage gain of 6. The volage variaions ha appear a he base of 0602 are amplified and direc coupled o he base of The volage gain of 0602 is limied by he value of unbypassed emier resisor R608. The signal a he base of 0603 is amplified and AC coupled from is collec or o he video clamping circui (D601 and R612) hrough C603. The gain of s limied by he value of R610 and by connecing i back o he degeneraive emier of The oupu from pin 8 of R602 will be whie pos1 ive video less blanking (unless he opional composie blanking amplifier, 0606, circui is presen). Resisor R601 serves o erminae he incoming composie video signal when he differenial amplifier circui card is no presen. When he differenial amplifier circui card 1s -;;;;sen, however, R601 is removed. Resisors R602 and R603 provide base biasing for 0601, while R604 and R621 are load resisors. Capaciors C610 and C611 are presen o mainain a fla video frequency response. Re sisor R606 and R607 provide base biasing for Resisors R608, R609, R611 and 0602 are he b1as1ng componens for Resisor R613 is a dropping re sisor for he +24 vol source, and capacior C604 provides low reacance o low frequencies for add11onal filering of he +24 vol source. Sync Separaor Circui (Signal Flow/Componen Descrip ion) A composie video signal (sync pos11ve) from he collecor of 0601 is (AC) coupled by C607 o he base of Resisor R622 is for base biasing, and R623 S he load resisor for Capacior C606 is a rolloff filer o remove he video frequencies and ensure ha only compos1e (verical and horizonal sync appears a he collecor of One pah for he composie sync is o he video clamp diode. D601, which is used o resore a DC reference volage o he video signal. This acion mainains a uni form black level a he CRT regardless of video conen. The composie sync is also (AC) coupled by C608 o oupu pins 6 and 9 of connecor P602. (C608 also blocks DC from geing o he monior circui card. The oupu from pin 9 is a negaive-going verical sync (only). This is accomplished by R625 and C609, an RC inegraor nework. which removes he high frequency horizonal sync componen. The oupu from pin 6 is a negaive going composie (horizonal and verical) sync signal. Remor R624 is required o limi he curren for he TL inpu o he monior circui card. Overvolage Proecion Circui Transisor 0605 and associaed componens form an overvolage proecion circui. Whereby, if he +24 vol source, which operaes all sages on his circui card, ever exceeds vols, zener diode VR601 will begin o conduc. Once VR601 begi o conduc, and he base emier volage reaches 0.6 vols, 0605 urns on. Wih 0605 on, ground is applied o he base of he inpu composie video amplifier, 0601, which urns off. Wih 0601 off, he incoming composie video signal is prevened from being processed o produce he necessary verical and horizonal sync o he monior circui card. Composie Blanking Circui (Opional) This circui, when presen, permis he reinserion of horizonal and verical blanking o he video signal. To operae, however, i requires separae (pos11ve going) horizonal and verical pulses from he monior circui card. These wo pulses are mixed a he base of common emier ransisor, 0606, o become compos1e blanking a he collecor of Resisor R618 fixes he level of composie blanking added o he video. Resisor R616 is a summing resisor for he mixed verical/horizonal pulses a he base of l... --:_---.r"'.'"-

13 --:::_)...,, Descripion) 11nale he 1ncom1nq com ffrrr\f1j arnpl1f1pr circui 1ffe1en1al ampld1f'r circui removed. Resisors R602 or 0601, while R604 and 1ors C610 and C611 are frequency response. Re base biasir>q for ind 0602 are he biasinq " R613 is a dropping re 1d capacior C604 provides es for addiional filerinq Flow/Componen Descrip- (sync posiive) from he >d hy C607 o he base of e biasing, and R623 is he or C606 is a rollolf filer ies and ensure ha only 'al) sync appears a he nc is o he video clamp > resore a DC reference is acion mainains a uni ardless of video conen. 1C coupled by C608 o r P602. (C608 also blocks circui card. The oupu erical sync (only). This C609, an RC inegraor 1gh frequency horizonal from pin 6 is a negaivend verical) sync signal. imi he curren for he card. ed componens form an Whereby, if he +24 vol ges on his circui card, diode VR601 will begin ins o conduc, and he 6 vols, 0605 urns on. :! o he base of he inpu, which urns off. Wih e video signal is prevened ice he necessary verical r circui card. nall ermis he reinserion of o he video signal. To separae (posiive-going) rom he monior circui d a he base of commonome composie blanking sor R618 fixes he level he video. Resisor R616 mixed verical/horirnnal 1). lill!l +HV OJl "' '" r r-"!''. -:--- cs:' -J,..,..._...,...,,_... C.ll!C,1,1(1.OlOC!W;Ull CUO 111 S6 P603-1f' UYCJJT en win! Ofllrosm -:-.. ""'" ;;-- _';---;,!, P50l S5 $6 P > uv Oii 0 "'' Mrl"L. '11J COlll'CSllf +' '::o<j, ::,J;2Jr, ' ' lllclljt c.uo vlolll mo M. fumf CllQllT UllO TEllCJM'CTONS...DHfll"'lll j..,_l'l(cllr.ullcjs ""-Sf"' ll SOlll: llloofls. /!:lf_m_a_!'::. "lo r_ f.?.: i' 1. ijnlss '!'-OPWl'.f 0,0'l{h,.(! C..,.! lf'll \.A, f', AP :.. '"1(11[}1 AP.. OS, ;,:'; 01/ 'r \;.: 1 r 1-1"',S, ;. llfl Oji,, " ''1 1" A "'"" P"P', --,!S'. 1.. VOi TlG S '"K[N 0 1Jll!"(, 'lfilja\ NPUT, N]N011 ON ro. 1.\V P P CO'"PO\Tf 1orn.1 J. NC rnlf"c'olls 4. lfllmjo'nr. ll!s!sfo 111 S NOT Pl/ flj' HlfN Al rfl11"'f NP,>f Llllll T ON H lll PU.if! ';ON fjng Of l, sw1, \/...!', 1 ljs o.!h1f's SOOO!ll Wlgf COMrffC'J()frl 10 H Q! Cll'J' run C(l... P"JNfN' (111 ';ONNfC 01 Pllf\N'S,. "' J', Pf "'' 1 Pi'-! f0nn!' ON. ; :111 ';f....,,.';;:] Pf[! P' "'; f!',1, Of Piii \!f' S1'1HD!r s11<r.11 ';O"'D'Jr ' ' fp. 111 p11f -- "1 NS CRCUT CAP f Oil C1.,.llJC'll {,.J.. l:jllo, il' Ol j'(o Q()M N ll\ r-sji\lf &'M r,q(l11no, " - l(f>ff[n!s!lstf{)jronout:'(lqs. s. Cnff'j[(!OllS f>\oj A'-il) PO? ur locatfd Qi. Tll[ Olfl.,.,,_P. CllClJll CUil. S? m """;"'.. - j- 1,,, ' - i ",. S.. '' / _,..,,./ -NH ll--.,,:, [' J -, "'' L 11J\4 m "' i'i',v S16 ;>1_.;r0 Q, :,. lno r '" ONST ANT 11-1 CJRl?HH SC1'Jl.'f". _J VOfO -- - irm'l. flmp. r.q:1.v " " ""' / ,_ MRJ 1fll0'\b::Af 0 Dfll J / + jco i L-... """' /!' SOJ ""f '"' S6 i;j.j..., D -- HV ll.,) TO "01 ON COM"01 1sllf> O.! 1*1 1l1 ll\ j---f 1 f \ r.omnr r l Vl!llO O\Jl r 10!0 fll(jll 1 OS114 lll'ff 'laos -..._., ;: C " ""' """''"" '" '" ",",, --..._ ' '.'. '"'"""' 0 : "" : u sos 'OO -'--. J _ Ol>C -i="" r-1 NPUT/ - l\)11- "'"""'"' f - -, / " _ - PSO CONu;, """'"..,,/ : f< 1,0TfSl : -./ ' WH "' -<<:-i- 2(---- '" '.,., (j /.. COMPOSH [!NOi () ''"'" V!DfO USfO l ' L ,...i_]flllj( Ull[S O(J M"Ul fll!.-ul SlGlil <A, o.s '0 l.v 1,, J.ll T( \,a' -01 Sl ';rool!l cm 11"' 1 " ' L J : < ' <1 :O\ 52 ""'"" i lll()tffl CMll J l 'O!D vr:10 JN m n l,/j c - -H- r--!llt:;;::;.!clll -; -... COll"O!llf rll!jt{ r :< l f 1 <OO! US!O k "::' 1'.? 1 p : -:!. (--1--( 'i' ;J?;L 1 '"-] r',' rc0m'0''lf... uj:..,. CC**OSJTE H _,/ _ l iar LT i lrw1 f T ri;lolo"" lv11rompl 11, ' =- no "j; J''\iGF W l..\!::j/pl(qtl[tjon "" 11 Figure 17. Differenial Amplifier Circui Card lm!' lllol OJ Sll>f!Al YU)[S WllM COll's rool'l!. Sf l'og r- ';J.u,. l...1 HO' o.l , --, ] ""' 111'111',, +_lcso4 HllO'f! S \ 1 <NH----) l '"----,.p4y 19f 1 ' C'OM'M!lfl -1 1 r >-o rh111 ) >--- CO... Olf : J. L _J 1 L_ J ill rr OUlP\lf COlrOfCTOffS.. ',,,... \!--'-:; """ "'u}., "" ';'.':';;:'," --. ',. \ ""' ' -.. l "' r"',;'"-,, ::: l--!.w.- un.n _.;uw :/ ,, (:!:) ' nolo pin /1 ' ' 1,... 01< '1 l 060] 11 r..io l 3..5V 1)60'1 1)1 E 11 ' '" '"'... 'll1 romp[lstf l --r.-1c.-.m "- l. '""',..,,,, 06 nd, co. ; 1.,16 ' l.l Jl70" / '. '/ M" fl]l" 'P ',:;\,,,, ll l!d '\ rr [;;;.._ '.;;;8'. '" ;,,,]' "" Jm 'O ir 1 ll,ll'f 1 -_-_: cm -- -, ::-;----.,'., :,: l' \1 47,; +H Ol'' " lllcll llljl rw.. rlf"!!s, "" -'1 i.1'jmposjte.w, " ""i NO!f\ '" /,,,.. - J +(' ' U , ' ' 1--!.W '''l lon "". -'.,!,,,.. / r '' '"""G 1.,r- "'-. :;.';,,, _ U U - 11 }'«11 ll r1n COJ11Jll(ll! ''1 """ ; r "'"' SC[MAT_lc l f(!f_!-j_q.. =i::,;:o;,;wec:;c ""on cmcv11 0 -s11::i:1 :1-::;'N Ol' 01suTOlf PONT Ol' 1111 llof "".p.. lls!nt\cflc\jl'clfllocmojll!!f\lflllll!slllll!of!oll 1'1 c s11otm. 10 O&'"" 0111i;r11L! unn llust llll&!l '0 > UOA!Ofll, lllllal llfclla&h()ll Jli0Vl'1 TwU H'f \N ll(icd fll'w OUTK:ll,_! -lls S"O-. S_CHfMATJC NO'fSz 1. Uff.!UOno(W!S( 11()1(11, "'-l CAC111J wna..:"' 1CllOUllO\, <ll All 11(11''1J VOll:S 1U111 1'f.,...,., WOH,, C.-C)llll'iOlr'fOTOllO'ClS,llf<UTO 1. ::SUl(=C ::.c:,:-c::s-:r.::c:.::' T" l, #of.1-c.lllp'\tllflccopolll( 1111ll'0'W1SCllCUTCU'b VU!S ll'w!o loof\\ (1, T n 11 Wlllf SOlDUQ DJli(!!J '"' rru' CUD,Ol' 11r(l()!OMll "' ' 11 '11llfl, O Ol)lll"Ofl, ""4.11 ' O!flflflf'lli... l'lhl C!CU' rue JS "'Sf"' ''* lllc c-ipo- \71 fllll " '. :;;;!'"TDjl! '"f OlllCJ"NfC'10fl S'401fr! i 4. wl ll)gf Cr.10- '"U!S SOl.M!lfO OJllCl 10 Hll,_Ul! 1110N110-C111U' CHfl(llrlT!Of C()oMONffll Sl(lOll00'!0ll l 11 fo 1., S. '"' ojllo!' MlllG 010\lflll Q60a1 lllo SSOC11 D,..,,fS r 011 U! 'Q'... lsflf' J- l OO(!S. 1. ::i",',.,oo::;\l1 l:,:; ::!: M () sc:i. SO( SlUl'Oll OCCOlll Ofl!fO( JTJlll ClllUll CA.ii '" "1111 /()0"., crcup 100 rlfsl,. 'll'lg OlllJlll lg ll 'llq' r l''l:ufll Wll:N ()i«!l[fl'll4jllo,l<illr<llflll'(""0!$jn!!l'(ctfbllj, 1 ff'u or :' '0'"""1 "'" r1cu1 cllll.. llf"l!c's A!!fflO!! ( '"00 or '<U''lf& CQ.. l'(klf{ ' 111 '<J TS c UJ!T :;oo _... Olrl!"'fll11A l'""l'l!l u'<' rllll rs '11SfOT. ' Figure 18. Composie Video Circui Card (-rrnccopionat81ankf;gr' ----,, /: 1 T /!v'c L)/)Ef).. f L

14 c:: ;jl f g. s c () c:: ;::;!;? a -SOLDER SDE SHOWNr "'VEll.T, l.!i HORZ -.N.. m csoy Q606 l'..l'r,! ::., r \01. l-:o,,. ' 1. R618,,, fl&oa ). 1f f 1 R8U,;, ; f"'. f4. :w 0 \. 060.' :1 i!.. u p',,., Q6. ' i C60"?., ',, :;R625. :.L).. +_J_esi>s' r,. 71 l:. ; eeoa ll!md., C904 --J\/\lv-- i! : T+' ' "4D6QS i./ ' ', " ' CllO, -1..;. :! -1 KM,.. '; : f f (l g i 1.. '.,., '*'..:, li&n P', f!.. i"' Me3.. -,:,.,,. ',,": j'--".i1,: l. P6<)3 Qeol!, <!.,,... 1!4 ',.,{him N COMMON TTL VERT. OUT VDEO OUT +24V N TTL HORZ OUT llld4... '.,'1' i, Po2f.,, a " 1 g} '--..,--J NOT USED { BEPC OL BEPC !"" BEPC-01<440-0 Ol BEPC FAE PC

15 ,.. l. J l, l '! r < ; J i l OS-SERES COMPOSTE VDEO MONTOR CRCUT CARD - REF NO. l PART NO. 1 DESCRPTON CRCUT CARD ASSEMBLY: (Order by model number only CAPACTORS: (Unless oherwise noed, all capacior values are C101 C102 C103 C104 C201 C202 C203 C204 C205 C206 C207 C208 C301 C302 C303 C304 C305,C306 C307 in microfarads) 23R29944A05 8R29967A12 23R29914A21 BA29959A77 21 S180E50 23R29914A77 21 R29964A05 21R29943A08 23R29944A06 21 R29943A08 21S180A62 (No Used) 21R29964A05 23R R29964A05 8R29967C31 8R29967C29 (No Used) C C309 (No Used) C310 23R29914A77 C311 21R29964A05 C312 23R29914A68 C313 (No Used) C314 21S C401 21S1BOE50 C402 23R29964A05 C403,C404 21S1BOB51 C405 21S180C41 C405 21S180E91 C BOC31 C407 23R1-0229A32 C408 8R29967 A36 C409 21R29964A06 C410 23R29914A40 C411 23A29914A73 C412 21S1BOE60 C413 21S180C08 C414 21S C C416 8R29930E45 C416 C416 C416 BR29930E46 8R29930E41 BR29930E97 C417 21S C OS-SERES COMPOSTE VDEO MONTOR CRCUT CARD REPLACEMENT PARTS LST /50V. 2000/30V; Ly ic %, 50V; Poly 100, 10V; Lyic o.110%,200v;po1y 120 pf 5%, NPO, 100V; Cer V; Lyic %, Z5U, 100V; Cer %, Z5V, 100V; Cer. 68, 100V; Lyic %, Z5V, 100V; Cer %, ZSU, 500V; Cer %, Z5U, 100V; Cer. 100, 50V; Lyic %, Z5U, 100V; Cer %, 100V; Poly 0.1 JO%, 100V; Poly 33 pf 10%, NPO, 500V; Cer. 22, 35V; Lyic %, Z5U, 100V; Cer. 1500, 25V; Lyic %, X5F, 500V; Cer. 120 pf 5%, NPO, 100V; Cer %, Z5U, 100V; Cer %, X5F. 500V; Cer %, Z5F, 100V; Cer. (DS3003, 4003 Series) %, Z5F, 100V; Cer. (DS3000, 4000 Series).01 20%, Z5U, lkv; Cer. 1.0, 16V; Lyic %, 200V; Poly 2200 pf 2%, NPO, 100V; Cer. 100, 16V; Lyic 4.7, 35V; Lyic %, Z5V, 50V; Cer %, Z5F, 50V; Cer %, Z5V, 100V; Cer. 220, 10V; Lyic.00915%,1200V; Poly Carb (DS4000).015%,1200V; Poly Carb DS %, 1200V; Poly Carb DS %, 1200V; Poly Carb DS %, X5F, 500V; Cer. 330 pf 10%, X5F, 500V; Cer. DS ) REPLACEMENT PARTS LST REF. NO. PART NO. C418 C419 C419 C420 C421 C422 C423 C424 C425 21S180E78 8R29951A07 8R29951A06 8R29967A31 8R29967A58 8R29969A85 21 S180A62 21 R29964A05 DODES: D101-D104 48R191 A12 D R02054AOO D201 48R02054AOO D301-D303 48R02054AOO D304 48R191A02 D401-D405 48R02054AOO D406 48R D407 D408 D409 FUSES: F101 48R R R S NTEGRATED CRCUTS: C101 C201 C301 C401 C402 51R10732A01 51 R06436AOO 51 A06015AOO 51 R06621 AOO 51 R06332AOO COLS: L201 24D25601 A02 L401 24D25603A 14 L402 24D25600A 10 L402 24D25600A 13 L402 24D25600A 11 L402 24D25600A 12 TRANSSTORS: R A03026AOO BR R03026AOO R03007 ADO R DESCRPTON 270 pf 10%, X5F, 500V; Cer. (DS3000, 4003) %, 200V; Poly (DS4000, 4003) %, 200V; Poly Carb (DS3000, 3003) %, 200V; Poly %, 600V; Poly %, 600V; Mlz. Poly %, Z5U, 500V; Cer %, Z5U, 100V; Cer. (Special) Recifier, Silicon; (91.412) Silicon Diode, Cn. Purpose; (2054) Siiicon Diode, Gen.Purpose (2054) Silicon Diode, Gen.Purpose (2054) Recifier, Silicon; (91 A02) Silicon Diode, Gen. Purpose (2054) Silicon Diode, Damper; SOOV (4921) Silicon Diode; (Dl K) Diode, Fas Recovery; 200V (75602) 01ode, Fas Recovery; 600V (73606) 2.5 Amp., 250V (120, VAC Operaion) C, Op. Ampl.; T3F C, 6 1nverer; 7406 C, Ver. Processor; TDA1170S C, Dual Reng. Monosable; 74LS123 C, Timing; NE555 Coil, 4.7 uh; (Peaking) Coil, Horiz. Size Coll, Horiz. Lineariy (0S4000) Cod, Horiz. Lineariy (054003) Coil, Horiz. Lineariy (OS3000) Coll, Horiz. Lineariy (053003) PNP; 7675 (24V Reg. NPN; 3026 (Reg. Driver) NPN; A2J (Video Driver) NPN; 3026 (Video Oupu) PNP; 3007 (Horiz. Driver) NPN; 7696 (Horiz.Oupu) -NOTE- When a componen requires replacemen, i is recommended ha only Moorola par numbers be used. This is necessary o ensure opimum performance and reliabiliy from seleced componens wih specific operaing characerisics. When a par number is no lised, however, an equivalen may be subsiued. The following pars lis represens componens for he basic composie video CRT display models; DS3000, DS3003, DS4000 and DS4003 ( 155, 255, 156, 256, ec.) Series. For replacemen of componens ha differ in unique composie video CRT display models, compand o he basic models, order by he unique model number, schemaic de signaor and descripion. REF. NO. PART NO. DESCRPTON REF. NO. PART NO. DESCRPTON RESSTORS/CONTROLS: (Unless oherwise noed, all values are in ohms, 1 /4 wa, 5%. Resisors no lised are of he fixed carbon film ype, 1 /4 or 1 /2 wa, 5%, as noed on he schemaic. Abbr: FCF =Fixed Carbon Film FCC= Fixed Carbon Composiion FMF =Fixed Meal Film WW= W:rewound MOF =Meal Oxide Film R104 R107 R110 R111 R210 R212 R213 R214 R216 R310 R312 R313 R314 R315 R323 R326 R402 R411 R416 R416 R418 R421 R426 R427 R428 R429 TRANSFORMERS: T401 T402 T402 T402 T402 6S126A33 18D25904A05 6S127A25 6S126A D25904A02 18D25212A D25904A04 16 D25904A 12 6S10621 E E31 18D25904A04 6R29872J D25904A03 6S R29891 A19 6R29891 A26 18D25904A06 6R29872L48 6S10053J04 6S10053J C25218A 14 25D25772A04 24D25291A A13 24 D25291A10 24D25291A11 T403 25D ZENER DODES: VR101 48S10813A06 FCC; 220 5%, 1W Conrol, Var.; 10k (+24V Adj.) FCC; 100 5%, 2W (Sandup Type) FCC; 82 5%, 1W WW; 1.2k 5%, 5W Conrol, Var,; 250k (Mdser Brighness) Conrol, Var.; 200k (Remoe Brighness) FCC; 270k Conrol, Var.; Conras (Opional) Conrol, Var., 100k (Ver. Haldi Conrol, Var.. 100k (Ver. Size) FMF; 150k 1%, 1/8W FMF; 274k 1'},,, 1/8W Conrol, Var.; 100k (Ver. Lin.) MOF; 1.0 2%, 1/2W FCC; 3.9 5"'' 1W Conrol, Var., 200k (Horiz.Delay) FCC; 68k W%. 1 W FMF; 15.4k l')c. 1/8W ( DS3003, FMF; 18.2k 1%. 1/8W (DS3000,4000) Conrol, Var.. 20k (Horiz.Hoidl MOF; 82 5%, 1 /2W FCC; %, 1/2W FCC; 1.0 5%, 1/2W FCC; 330k 10%, 1W Conrol, Var.; 2M (Focus) Transformer, Horiz. Driver Transformer, High Volage: nl. H.V. Rec. (DS4000) Transformer, High Volage; r.cl. H.V. Rec. \054003) Transformer, H;gh Volage; nd. H.V. Rec. DS3000) Transformer, High Volage; ncl. H.V. Rec. (DS3003) Transformer, Dynamic Focus Diode, Zener; 5.1V (N52316) CHASSS MOUNTED COMPONENTS: (No par of circui card) L 1 24D Yoke, Deflecion (0$4000 Series) Ll L1 L1 Sl Tl Tl 24D D D25687B16 15R29982A06 39S101B4A64 1V D25239B49 - CRT REPLACEMENT NOTE - Yoke, D1llecion (DS4003 Series) Yoke, Deflecion (DS3000 Series) Yak. Deflecion (DS3003 Series) Housing, Recep.; 6-Conac (less conacs) Conac. Recep,; Female (51 requires 51 iransformer, Power (ncl. Conn S1 'Transformer, Power (Less Conn.51) Order replacemen CR T's by referring o he CAT denificaion Label on he bell of he wbe. There will be a manufacurers Type Number, and a Moorola Par Number ha begins wih a 96 prefix. (An ex11rnple of he complee Moorola No. would be 96R f he label is no presen, or legible, ordl!r he replacemen CAT by he complee model number; such as a DS , DS , ec... REF. NO. PART NO. MECHANCAL PARTS LST 41 C25930 A C01 1V25574A D25901A01 7D25901A02 7C25902A01 7C25826A04 42S10122A 12 7D25307C01 7D25307C A A A02 7C25974A01 7R29882A01 DESCRPTON Spring, Aquadag Clamp, Deflecion Socke, CAT (nd. i!ads and resisors) lnsijlaor, Transiuor Bracke, Side; Righ-Hand ids4000, 4003! Bracke, Side; Leh-Hand (DS4000, 4003 i Bracke, Mouning Foo (2 Req'd. Hea Sink/Suppor (C301) Clip, fuse; F101 2 fl<q'd.) Bracke, Side; Righ-Hand DS3000, Bracke, Side; Lef Hafld DS3000, Adaper, Adjusing Conrol Magne, Yoke: Non-Flexible Hard Core Magne, Yoke: Flexible Sof Core Bracke, Circui Card Mg. Suppor, Circui Card For Dill. Ampl. and/or Comp. Video Circui Cards

16 -. - r { fr (' f,. [ ' f -. :< ; (i ' f } r \ K l \' i!' P2 lnote 5) +14V CWT_;,-;; J, :,1 \, r- 3 lzovac { 4 TJREO MPUT YH (JlOl ms 24V REGULATOR EARTH >- - GROUND relblk GRN - S >-: Jo r(, S JUlOl. 3 >- J_ ' ;::5 f.. ' RETURN JU01' +14' ' '"" ' -- ' -,.., J rl -:--... QV - "'1z 2.S-4.0V..._" AOJ: J-1 p - \r pp V 25 ' ' " ' ' ""..: V f' ' 0 +5V ' ' '"'"' ""' { 4 > _TL_ r ChAs.. 1s. SUPPL y 240VAC GND NPUT 6,---- ' " RlMOVE RlOJ 300 r- SPOT OZOlr V C202 R V ---_;i 11 >l '. +)QV KLL..n..ri.. 2S 40VP-P V lnoh 6) l '\, R2B "',., ''i;;.,,,_ ' '" ''"' W O +24'1 ov _,,,.-,-. " "" "" ,,,, (SPECAL),- O ( O OOOO! AMPL. GROUND OU'l'Ul 40V P P JlZ\ ""'""... ' " --' ' " "''"' -, J """. '.,.. " -:,,.1... ""'" """ /j 4V p-p V Pl "' ; ", V ll'.101e l J-- + JClOJll -[',r," " l 1 '",..; '1'<'U lql, '"'" r--., 11 1'.; n- T " i 1'.... LlA "' ' -:ll -J 10'4 -- -<> 0 l' 1 '<GOO -. / lu '" ' r ' J.. ]ciu' " VERT ---j 9 l 47. ''.!NOT USEOl [JlUl NEG.l 0)4-7 >+-- --) { '>7 ) ) l! COMMON \- 0 10>, ' TTL,,i:'.R40l HOR: 11N G.J! *0402 Z054 m 7(- Tll Mll_.,. QlillHL f'll;qducl AHTY OUili S "'111#\llU' flllalll( 10 l lay U.lHAHO JDUli\l HGHATOll fuqujlf lht THflf PAAlll lpuld MTH lehl/al PAll UMHS JH01"'1 J HE lllwc AL PAlln lll't OaTlDl lhv AOJ.J S fatolly llau... MMl llh VQLTAll YALUH!AT 110 lfuqhtmoll> Allf... TAlll1 -- -ov -4V P PH 6 >r--- --N/!- -i.,, <> '\,._ DRi ve S Yf1C r QEL,\ 1 R40l 200K HORZ. DELAY,v SYNC REGENERATOR L 1.. < _-. ' '' :: ; llll. :'lu ',1.'l:ll' '20 CZO,!o[ 120; rljk To.1 1 Rll4.1. r _$.- 2 K V fr;', 1.. 1d (,z,., YU'.[.,_, J,.--;J n._,- i;i. J.! 1..,.70y + iczos 105 ) VDEO DRVER A1J MEASUREMN' O'FS: WAHFORMS ANLl UC VOL 'AGf W R: TAKH" WTH SGNAL LEVl:LS SriOW,_, AT CONNlCOR B V JOfOl ANO 9 SGNAi NPUlS AR Z.'l.;.o P.J All VARABLE CONTROLS SHOUl 0 Bf SET TO VEW A NORMAc ALPHA-NUMERC OlSPLA. ALL WA\-ffORMS ANO OC VOLTAGES WERE TAKEN WTH RUERlNCE TO COMMON FOL ON TH( CRCUT CARO, All OC VO;_ TAGES WERE TAr-_N WJTH A PRl:CSJON JVM. YEl R'11 ' _1w _L '. - e+- - L -- - _J SPARK GAP MAS fer m; -' TO ALL PNS JN CRT SOCKET R RMS {!- B :NOAR\ -L\_ l j / +70V ' f" ORG Rll> 470 BRGHfNE'S " ' 17!" CZOZ_ - EMOfE BRGHTNESS NOTE 21.oi R '1ll ' ' ORG. "' / 7/ ljjj \if i_ 1 f' ) SLE 1!1io.,r;T; ". 1 ;labl:c"i'.j; R4'4r rui // av P-P v S!JOV Pf' H b -----=- - l4v -70V WHT \_!\}\ L \B _ OV - _, 1w1:.iis Yl]lr'.f l. -" -_ DYNAMC f. oc u --"- - BLK r RiOT'\ HORJZ. r OSCLLATOR - - +!3V!3V ;:-, H --OV -- :r-- f"" +1'V +"""/ i. Q401 l' J;.uo / --- HOK.Jv /' - (TABLE lj 6 1::.Ch. OU ],C4ll+ R-419!_-'1;Jl C415 -'' "'J \} rno T- [ '!-''' ;;;; HRE>. i.jvlf-'----1 "' - o;v -. _-_'_J"/..:'.11 f PH JC.: P'l.1V.s, - l\ f il4ll R4l4 2 VOL 2_ :':zok l '1 r '{: -1-._,; ;;g RESET. _ / M:', ' f..,w, f' r_' C414. '' ----if :11 " '''" s11 \ O.l T, jj-) (423.. RED R432 l/2w "' 100 1_l- /' JO<. 1 l.j; 'l.j _,, / 7L J PHA'.)i:. D 1 lc,, oozi; g;o R41 R418,...,_VR < :.. 'Je<fi' 1HORii'./ -'':./11 1. # -,._C41)) _ R4J] J 4oB -lf1 4 --r: 01 1);io._c.J / C4lr -.- {24 ;, /J, :{ "F1ABlE lil J,JK T.on ff?;.j;.00?31 l! 1 rt, j,1-? il4l! c40 + /+1 +nv.r,, 'f" l.iji.,,..,.. 8! R r lli/ ov ---, _, C41!]_--. jr421 [J404 " ' L i"" "" r 11 " l _,---,. rov 2054 C406., 112N r ' _ 40V P-P H / 4J, L... FHOBACK 3_V P.1'.. ll, 1-1. O!AG. NO, 63Lll'.lJlAl4 U, ',llilil.g.d.il r ' 1 THfSf COMP0N[N;5 i nop YlfWJ TO' [ ") < E" ::::!1)011 /,>o- 6 : ::i 6ETSolJT -UTTTJ '! 1i'DCT"OU08 rro. " 560,, lczolc 1C20l JC40: 6 \_ / '!" - <'--" 1' OP TEW V'"'-]l"'l 7 [_ 11 ic 101 '- ""!!OA TAB. ',o.uu1i-j.. 1: i O 1 C40Z '*" i d4u6 <Ji, C4H U,"'(); 1 /7?7 llabce BD2 lov T.< OAMPffr"" * BSY P-P H Al WAVUORMS WlRE TAKlN WTH A WlllfBANO l)j0mh71 OSC!LLU:,CQP, ANO SYNcD NHR SWEEP RA TE i>jjca ll ll, V Rl!CA1 OR APPROX. SMSQV A/110 hhorjlontal OR APPROX, ZluSDJV. ** VO TAG( VALUlS NO' PR0Vl0 0 BECAUSE Of VAR!- L!NSECTOTTON WTH ASSOCAHO VARABLE TABLE 1 os3ooo os3oo3 os4000 os4001 C , Blu '" fu; J12w 10. LEGEND: C Pf HOPF ]]OPF 270Pf C Oll R K l 5.4K l B.2K l S.4K l R4ZS R " R433 JUMPER JUMPCR JUMPCR JUMPER C " NORMAL HBl:H?l NESS ClJS T OMi SUPPLED MA TE TO Sl!PN VJEWl 14.0KV \ ll.jkv 15.3K'f' 115.2KV.. - RE.PR SE..i;. ULUi EYfL T CONNECTON TO AN OFF-CRCUT CARO COMi'lJ!'Ji';l ;JR CONNECTOR, 0- RlPRlSE<.T\ THf lir'lgn OR OJSTRJBUTON PONT FOR YOLTAGE VALUE lno]( AHil..-J, CRCUT CMiJ foj; '.::::JMMON RETURN, l larth GJ;r(;MJ -----;. P1 UG 1PJ/f'l'.;.d r']" l.0n'.ecton SOCKFl S.':lMAii- r'ln CClNNlCTON GENi(AL s_:[ M;< ;c NOH:S: 1. UNLESS OTHii<>Vl!.l 11Jc:ATEO, ALL CAPACTOR VALUES ARE in M!CROFAl(.;1<_,,.ANrJ Ad. RfSSTOR VALUES ARE!N OHMS, Ji4W, s... CQMPl UE DESCRPTON OF COMPONENTS, REFER ro PAHS 2. rhe REMOH 6RH)1!M SS CONTROL lr213! S MOUNTED OFF lhe CRCU! AiJ 1 l. f'os!t! HUH ii "ljc Sf OUT TO OPTON.AL COMPOSTE BLANKNG AMf'l '. ON COMPOSTE 'f'olo CRCUT CARO. 4, f'ostjyl Vff;!J(;L fjlsf Ol1T TO OPJONAL COMPOSTE BLANKNG AM!-1. W'1 COMPOSTE VDEO CJRCLJT CARO. MALE PNS Or CONN:TQR P602!ON THE COMPOSTE VDEO CRCUT CARD SQLOE>i DRECTLY NTO HOLES!LABELED P2l ON THf '-'.ONi'fOR CRCUT CARO. T 4lll* HGH VOi T A1.; ' 'c!a.nsfljrmfw W RCTFER!JJN ---!. _? r,, _, ; ' l4 ii l ; : , la8lell i! -'"'' u 1 -'- c41l ao, J' ',001 \.003) BR r '"OT[ 31 - ov-j +70V '111" w.. RHli \_ P-P H 6. SGNAL AMil, jruu!: ARES WTH SETTNG Of CONTRAST CONlf(Ol, l<:j, CONNE.CTEi.1 TO THE COMPOSTE VlOEO CRCUT CAc<L1. ( Vl ( CRT ) Fil OS-SERES COMPOSTE VDEO MONTOR CRCUT CARD SCHEMATC DAGRAM 5