56XX EMCO 10 Inch VGA Colour Monitor (CD 10014XX)

Transcription

1 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Contents Chapter XX EMCO 0 Inch VGA Colour Monitor (CD 004XX) INTRODUCTION This chapter describes the 0 Inch VGA Colour Monitor used in the NCR 56XX range of Self Service Financial Terminals The monitor is a self contained replaceable unit capable of displaying computer generated graphics and text. 5.6-

2 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) DESCRIPTION OF OPERATION The high resolution colour monitor, model operates as a VGA compatible video display and is suitable for use with interactive video applications to display computer generated texts and graphics. It drives a high resolution colour picture tube with a non-glare dark glass screen formatted as dot trios on 0.8 mm (0.0 in) pitch. The CRT is preassembled with a yoke which is factory adjusted for purity and convergence, therefore, no adjustment is provided or necessary for field installation. Separate Red, Green, Blue (R, G, B) analogue signals are required as data input and separate horiontal (H) and vertical (V) synchronising pulses are needed to drive the horiontal and vertical circuits of the monitor. The synchronising pulses are at TTL level. The monitor will automatically sense positive and negative polarities of both H and V sync. pulses in order to display the following three modes or display formats: Sync Polarity Hor. Vert. Mode 640 (H) x 400 (V) neg. pos. Mode 640 (H) x 50 (V) pos. neg. Mode 640 (H) x 480 (V) neg. neg. The monitor runs at the horiontal line rate of.5 kh and a vertical rate of 60 H or 70 H depending on the mode chosen. It is a self powered unit which features an Automatic Voltage Selector (AVS) compatible with 50 H and 60 H frequencies. The AVS is located internally on the Power Supply Unit (PSU) Printed Circuit Board (PCB) (which contains the Switch Mode Power Supply (SMPS)), and is capable of operating on two ac supply frequency ranges, these being either 0 VRMS (88 Vac - Vac) or 0 VRMS (76 Vac - 76 Vac). MECHANICAL ASSEMBLY The monitor is assembled in a metal box and consists of the following components: 0 inch colour CRT with the pre-assembled purity and convergence aligned Deflection yoke The PSU PCB mounted on the right hand side of the metal work as viewed from the front of the monitor The wedge shaped Deflection PCB contains the sync. polarity sensor circuit and both vertical and horiontal scan generating circuits (including the E-W diode modulator). This panel is mounted on the left hand side of the metal work as viewed from the rear of the monitor The RGB Video amp./tubebase PCB contains the RGB video amplification circuits as well as the tubebase circuitry, this PCB is mounted on the CRT tubebase The PC Core video and sync input to the monitor is applied via the 5-way D-type connector (CN9), mounted on the rear metal work. 5.6-

3 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) LEFT HAND PLATE COVER DEFLECTION PCB CRT EHT FOCUS LEFT HAND PLATE TUBEBASE PCB A BASE PLATE DEGUASS HANDLE TOP PLATE FAN PSU PCB BACKPLATE RIGHT HAND PLATE

4 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) SET-UP AND OPERATION After the monitor is installed in the terminal. An ac supply voltage of 5 Vac is applied to the IEC connector at the rear of the unit. The RGB video and H. and V. Sync. signals from the terminal are applied to the monitor via the 5- way D-type connector CN9, both connector screw locks are then secured into place by using a screwdriver. With an appropriate trimming tool adjust the brightness and contrast controls to give an adequately illuminated display. As the monitor is factory adjusted, it should not require any further adjustments. CIRCUIT DESCRIPTION GENERAL The monitor comprises a 0 Inch Colour CRT housed in a metal box with the electronic circuitry mounted on three printed circuit boards, namely: The PSU PCB contains the Switched Mode Power Supply circuit (SMPS) and automatic voltage sensor the CRT Tubebase PCB contains the RGB Video Amplifier and the tubebase drive circuitry the Deflection PCB which contains the switched mode power supply circuit and the horiontal and vertical sync. polarity sensors, horiontal and vertical scan circuits and the diode modulator circuit for E-W pincushion correction. The illustration below is a simplified block diagram of the monitor. The principle parts of the block diagram are: RGB Video Amplifier (RGB Vid. Amp./Tubebase PCB) SMPS (PSU PCB) Horiontal Deflection Circuit (Deflection PCB) E-W Diode Modulator (Deflection PCB) Vertical Deflection Circuit (Deflection PCB). Colour Picture Tube A high resolution 0 Inch CRT is used for this monitor. It is a shadow mask type with in line guns and a triad configuration of the shadow mask holes and the phosphor trio dots on the screen. The deflection unit and the tube are matched into a self-aligned package. The anode voltage EHT is 0 kv while the focus voltage Vg, applied on G, can be from 5. kv to 6. kv. Screen grid G voltage, Vg, of approximately 550 V is applied to G for the correct R, G, B cut off levels. This voltage is derived from a potential divider network connected to the ET supply to obtain a stable voltage with respect to the cathodes and G under all load conditions. G is used for brightness control and for horiontal and vertical blanking. Beam current limiting is applied to the CRT circuit via the RGB video processing device IC0 (LM0). The cathodes are driven from the RGB amplifiers and the heater voltage of 6. VRMS, derived from the line output transformer, is applied to the filament of the tube

5 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) TUBEBASE PCB CN0 5 VIDEO PRE-AMPLIFIER IC0 VIDEO CASCODE OUTPUTS R G B RGB GAIN ADJUSTMENT VR0 VR0 VR0 CLAMP CONTRAST INPUT & BCL CONTRAST BCL R-TR-TR4 G-TR7-TR8 B-TR9-TR0 P BLACK LEVEL ADJUSTMENT PRESETS R-VR05, G-VR06 B-VR04 89V V 0Vdc HEATERS G G FOCUS EHT 5Kv B G R DEGUASS COIL DEFLECTION PCB 89V V 0dc HTRS G SET HEIGHT 7V VERT. LIN E-W TRAP VGA VIDEO INPUT CN VERT. SHIFT VR VR6 VR4 VR5 VR0 VR6 VERTICAL TR TR4/5 TIMEBASE CN & DRIVE IC6 TDA675 SYNC POLARITY V. H. SENSOR SYNC SYNC IC 74HCT86 V. SYNC R8 Flyback PLL FLYBACK Pulse CN5 PULSE SCAN COILS VR7 HOR. PHASE HORIZONTAL HORIZONTAL HORIZONTAL TIMEBASE DRIVE OUTPUT IC8 TR5 & T T LM90 VR.5 KH E-W MOD. IC7 TDA845 TR6, TR, TR, T WIDTH VR7 C57 LINE & FIELD BLANKING BRIGHT VR0 E-W PIN VR5 HORIZ. OUTPUT TXFMR T CONTRAST BCL CLAMP HOR. FREQ CONT. VR9 Flyback Pulse -ve 5 4 CN CN7 0/40 Vac ~ PSU PCB MAINS FILTER COMPONENTS AVS CN4 D45-D48 PVM REGULATOR PWM SMPS IC9 TEA09 &TXFMR T4 CN8 P4 P P5 P P FAN Flyback Pulse -ve 89Vdc Vdc Vdc LV Vdc Vdc 89Vdc VR DC ADJ PSU RGB Video Amplifier/Tubebase Analogue RGB signals of 0.7 V peak-to-peak level are applied to pins, and respectively, of the 5-pin high density D-type connector, CN9. The RGB signals are then fed to IC0 (LM0) via CN0 pins 5, and respectively. The input impedance for the RGB signals is 75 ohm given by VR0 and R04, VR0 and R05, VR0 and R06, each preset resistor controlling the overall gain of its respective amplifier. IC0 RGB input pins 9, 6 and 4 contain three clamp gated transistor circuits TR0, TR0 and TR0 which allow the monitor to display a brightness level when CN9 (5-way D-type connector) is disconnected. The LM0 (IC0) is a wideband video amplifier device containing three matched video amplifiers, each video amplifier containing a gain set or Drive node for setting maximum video channel gain

6 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) External HF compensation to this IC being applied to pins 8, and 7. Further features of this IC being three gated differential input black level clamp comparators for brightness control and three matched attenuator circuits for contrast settings. The contrast dc voltage being applied externally from the Deflection PCB Contrast Control to pin of IC0 via R0. Beam current limiting from the Deflection PCB line output transformer T is also fed to IC0 via TR05, TR9 and associated circuitry providing pin (Contrast Control input) with an interactive pull down. The low impedance RGB output drives from IC0 are fed to their respective CRT cathodes via three video amplifier drive circuits configured in cascode mode, these being as follows: TR, TR4 and associated circuitry providing the R video cascode amplifier drive TR7, TR8 and associated circuitry providing the G video cascode amplifier drive TR09, TR0 and associated circuitry providing the B video cascode amplifier drive. The three identical video cascode amplifiers for the R, G and B signals are developed with a maximum output swing of 50 V peak-to-peak black to white to drive the CRT cathodes. The supply voltage of 89 Vdc for the RGB video output stage is obtained from the Deflection PCB. Each amplifier stage contains a Black level adjustment preset (VR05-R, VR06-G and VR04-B) with a 0 V shift adjustment capability to its respective cathode. One side of the presets is taken to an externally supplied 0 Vdc via a 0 k ohm pull up resistor to provide the black level range setting. R70 sets the correct voltage across the heaters at the given current. Switch Mode Power Supply The monitor employs a Switch Mode Power Supply (SMPS) located on the PSU PCB to generate three primary dc supplies namely: +89 Vdc for the horiontal deflection circuit + Vdc for the vertical deflection and E-W correction circuits + Vdc for the small signal circuits. The SMPS uses a current mode switching power supply control circuit IC9 (TEA09) and associated components which offers the following main features: High stability regulation loop Automatic input voltage feed-forward in discontinuous mode flyback Current limitation Full overload and short circuit protection Thermal protection Synchronisation capability with internal Phase Lock Loop (PLL). The monitor features an Automatic Voltage Selector (AVS) compatible with 50 H and 60 H supply frequencies. The AVS is capable of operating on two supply frequency ranges, these being either 0 VRMS (88 Vac - Vac) and 0 VRMS (76 Vac - 76 Vac). AC supply voltage applied through the mains RFI suppression filter is full wave rectified by diodes D45 - D48, and filtered accordingly by C75 and C76. Start-up voltage to IC9 pins and is applied via R9 and R

7 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) The power switch transistor TR0 is directly driven from pin of IC9 through the base resistor R90. R9/D9 network is used as a damping circuit and the dv/dt circuit is formed by C74, R95 and D44. The voltage developed across R94 is fed back to IC9 via R84 and is used for current mode control and overload protection. D49 and D54 provide protection against over dissipation of R94 in the event of TR0 failure. The switch mode transformer T4 winding (-5) provides the supply voltage of IC9 through the rectifier filter network of D8 and C7. The secondary voltage stability and adjustment of the 89 Vdc is provided by sourcing the voltage from the -5 winding of T4 and feeding the rectified voltage through D50, C70 network to pin 6 of IC9. VR (SET B+) adjusts the 89 Vdc output. The winding -5 of T4 also provides the demagnetisation sensing of T4 which is applied to pin 5 of IC9 via R89. The demagnetisation circuit within IC9 disables any new conduction cycle of the transistor TR0 as long as the core is not completely demagnetised. To prevent the switching characteristics of the power supply giving rise to interference on the screen, the power supply is synchronised to the horiontal frequency of.5 kh by applying a horiontal flyback pulse from a single turn around the core of T (Line Output Transformer LOPTx) to pin 7 of IC9. The PLL output (pin 8) supplies a correction current to pin 9 through an external resistor R8 so as to maintain the oscillator at the correct frequency. R79, C7 form the RC network to determine the frequency of the oscillator of IC9. The 89 Vdc rail is obtained from the secondary winding 4-6, through rectifier and filter network of D6, L, C6 and C6. The Vdc is provided by the rectifier and filter network of D5, L, C60 and C58. A Vdc rail is obtained through rectifier and filter network D4, L, C6 and C59. Dual PTC resistor, PTC, provides a decreasing ac magnetising current through the degauss coil (mounted on the CRT) after switch on. The device is suitable for either 5 Vac or 40 Vac operation. At power switch on, the PTC resistor causes a diminishing 50 H/60 H degaussing current which removes remnant magnetism from the CRT. The second part of the PTC will keep the first hot. Residual current in the degaussing coil is minimised in this way, otherwise a slight picture wobble would remain. Horiontal and Vertical Sync Polarity Circuit IC (74HCT86) works as a horiontal and vertical sync polarity sensor. The device is a high speed C-MOS TTL compatible input 4-gate EX-OR chip, all its external inputs from CN are flashover protected by diodes to ground or a 5. V rail. Horiontal sync output from pin 6 remains negative with either negative or positive input horiontal sync from the PC Core through CN. Similarly, the vert. sync output from pin remains positive independent of the sync polarity that PC Core feeds in. The PC Core can supply three possible mode settings of sync. which can affect the SET HEIGHT circuit, these being, 480 lines (mode ), 400 lines (mode ) or 50 lines (mode ). The latter two modes requiring the addition of VR4 or VR6 being added in parallel with VR5 circuit. This requires the gating of the appropriate transistor TR4 or TR, these being also controlled by IC

8 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) The sync. output on pin changes from positive to negative when the input horiontal sync. polarity is positive, this increases the positive charge on C, hence TR will now conduct enabling the 50 line height setting. To enable the 400 line height setting the sync. output on pin 8 goes positive when the input vert. sync polarity is positive, effectively discharging C, switching TR4 off and TR5 on. The RC networks R6, C and R5, C provide each of the time constants for the gating voltages. Horiontal Deflection Circuit The negative going horiontal sync. signal is applied to pin of IC8 (LM9). A phase control loop compares the phase of the incoming horiontal sync. pulses with the oscillator. The free running frequency of the oscillator is set at.5 kh and adjusted by VR. A second control loop compares the phase of the oscillator and the horiontal flyback pulse applied from the heater winding of the LOPTx to pin 4 (IC8) via C40, VR7 (HORIZ. PHASE), C9 and its associated integrated circuit components. The horiontal drive voltage developed at pin of IC8 is applied to the drive stage TR5 and the associated driver transformer T. The pulse switching mode between drive and output stage is a reverse polarity type to simplify, when horiontal drive transistor TR5 is conducting, the horiontal output transistor is switched off. To reduce high voltage peaks on TR5 collector D, C4 and R40 are connected across the primary of T. The Line Output stage provides the following: Line Scan current Brightness, Contrast, A (G), Focus, EHT dc potentials CRT heater supply 0 Vdc rail E-W pincushion correction. The horiontal drive from T driver transformer switches the output transistor TR base via R current limiting, the storage charge on TR base is removed via D0. This particular line output transistor has an internal efficiency diode that reduces dissipation in the diode modulator diodes D5 - D5. Line flyback tuning of the Deflection coils is performed by C46 - C49. Capacitor C50 provides the S correction (controlling symmetrical linearisation). T5 auto transformer is fitted to suitably adapt the basic LOPTx design to drive a 0 Inch CRT. The horiontal scan coils (H YOKE) have a saturated horiontal linearity control L9 in series with them which are adjusted to correct for asymmetrical scan non-linearities due to the resistance of the scanning circuit. C45 and R55 provide damping of the linearity control coil to avoid ringing. D5, D5 and D5 are part of the diode modulator circuit (which is described in the following sub-section). T is the modulation coil which accomplishes the modulation of the horiontal deflection current for E-W raster correction. The supply voltage of 89 Vdc is decoupled by C55 prior to being connected to primary winding of the LOPTx. This LOPTx, T, incorporates a diode split winding for generating the EHT of 0 kv, the unit also contains an integral bleed resistor/capacitor combination to improve EHT regulation. From the bleeder resistor network two potentiometers provide the necessary focus and A (G) voltages. The bleeder resistor network also discharges the CRT after switch off (for safety and reduction of spot burn-in)

9 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Two auxiliary voltages are generated by rectifying the flyback pulses sourced from T, for example, a positive rail (+0 Vdc) for the video amplifier, and a negative rail (-0 Vdc) to feed the brightness control circuit (VR0). Horiontal and vertical flyback blanking pulses are applied to the G voltage via TR7, C57 and associated components. The heater winding feeds the Video/ Tubebase PCB to supply the heater volts to the tube heater pins, a tap from this point also feeds the horiontal flyback pulse to IC8 pin 4 part of the phase loop circuit. To avoid over driving the picture tube a beam current limiter is used. A correction signal is developed across R70 located at the cold end of the EHT winding (pin 7 of T). This signal is proportional to the EHT current and is fed via the BCL connector to the Contrast Control input of IC0 on the RGB Video/Tubebase PCB. Diode Modulator The deflection coils have been designed to obtain good raster geometry at the top and bottom edges (N-S), but in the E-W direction approximately 6% correction is required. The diode-modulator circuitry provides dynamic correction by modulating the horiontal scan current with a parabola at the vertical frequency rate. The adjustment of the dc working point of this E-W control circuit sets the picture width. The vertical current flowing through R8 (the sense resistor) develops a sawtooth voltage across it, this signal is fed into IC7 via R74 and R6. (IC7 generates the sawtooth into a parabola.) A tilt is introduced to the parabola by VR8 (E-W Trapeium preset) injecting a small amount of dc current into pin of IC7. Adjustment of VR8 allows some correction of E-W trapeium distortion, this being due to small inaccuracies within the scan coils. IC7 (TDA 845) is a semi-conductor device specifically designed for E-W correction of displays. Output from IC7 pin 7 feeds TR6 (Inverting Amplifier) base with a parabola at field rate, the amount of parabola is controlled by the E-W Pincushion control VR5. The parabola on TR6 collector is ac coupled to the base of TR. TR and TR (emitter follower darlington pair) effectively change the impedance of the circuit across C4. This alters the drive current into T (E-W loading coil), hence, providing corrective feed currents to the horiontal scan coils. Adjusting VR7 (WIDTH) control shifts the dc operating point through T. Vertical Deflection Circuit The function of this circuit is to generate a sawtooth or ramp current to be applied to the vertical yoke to produce vertical scanning in synchronism to the external synchronisation pulses applied to the monitor. This is performed by IC6, TDA 670, which incorporates the following functions: Synchronisation circuit Precision oscillator and ramp generator Power output amplifier with high current capability Flyback generator Precision blanking pulse generator Thermal shutdown protection CRT screen protection which blanks the beam current in the event of loss of vertical deflection current

10 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Vertical negative sync. pulses are applied to pin 5 of IC6 from IC via R, R and C4 network. The oscillator frequency is determined by the RC network of R8, R9 and C. A supply voltage of V is applied to pin 4 through the filter network of R8, C7 and C6. C is the flyback capacitor which connects the output of the flyback generator, pin 5 to pin which is the supply voltage of the power output stage. During the trace time the supply voltage is obtained from the main supply via D4, while during the retrace time, pin is supplied from the flyback generator. The output of the power amplifier is pin and drives the vertical windings of the yoke. Pin is the inverting input of the amplifier. The network R7, R4 defines the dc level across C5 so allowing a correct centring of the output voltage. The series network of R5 and C9 in conjunction with R4 and R7 apply, at the feedback input pin, a small part of parabola available across C5 and the ac-feedback voltage taken across R6. For the vertical shift, a dc current is injected at the cold side of the vertical coils. This is obtained by means of TR and TR4 and associated circuitry with VR6 working as the Vert. Shift. The linearity control VR0 is obtained by applying a feedback between the output of the buffer stage, pin 0 and the centre tap of capacitors C8 and C7. The latter is connected to pin 9 which is the input of the buffer stage. Vertical Height is adjusted by VR5 for the MODE 480 lines (60 H). Vertical height compensation for MODE 50 lines and MODE 400 lines, VR6 and VR4, respectively. These controls are adjusted when transistors TR and network TR4/TR5 are switched on by two of the exclusive OR gates in IC. It must be noted that VR5 MUST be adjusted first before adjusting VR4 and VR6. Vertical blanking is obtained from the output of the vertical blanking generator, pin and summed with the horiontal blanking at the base of TR

11 ERROR CODES AND DIAGNOSTICS LEVEL 0 DIAGNOSTICS There are no level 0 diagnostics. 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) LEVEL DIAGNOSTICS The level Graphics/Video diagnostics tests enable the monitor to be tested and calibrated. The tests available are as follows: Linearity Colour Blocks B/W Blocks Contrast Beep. With the exception of the Beep test, all the tests can be cancelled by selecting the CNCL option. Looping is only allowed on the Beep test. Linearity Test When the Linearity test is selected a full screen picture is displayed on the CRT. Colour Blocks The Colour Blocks test is used to verify the overall graphics colour quality and displays colour bars on the CRT. B/W Blocks The B/W Blocks test displays four alternate black and white blocks on the CRT. Contrast Beep The Contrast test displays a white screen and black border, and is used to set up balance, brightness and tint. The Beep test emits a beep tone. ERROR REPORTING There is no error reporting applicable to the CRT. STRAPPING There is no strapping associated with the CRT. FUSE Fuse F is located just to the right of the power input connector on the rear plate and is rated at.6a, 50 V. 5.6-

12 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) MONITOR DISASSEMBLY SAFETY GUIDELINES Read the following safety notes carefully before attempting to service the monitor. The Deflection PCB, generates extremely high voltage for the CRT, in particular: 0 kv for the final anode 4.8 kv to 7 kv for the focus grid. Great care must be taken when handling this module. WARNING The CRT anode retains a potentially lethal voltage even when the monitor is turned off. The following procedure must ALWAYS be observed prior to disconnection of the EHT cap or any other task which requires the CRT to be handled:. Connect a clip lead or heavy gauge wire to the chassis ground.. Connect the other end to the shaft of a flat blade screwdriver that has an insulated handle Keeping well clear of both the wire and the screwdriver shaft, insert the blade of the screwdriver under the EHT cap and make contact with the anode terminal. Depending on the amount of charge present on the anode, a distinct snap may be heard as the CRT discharges. 5.6-

13 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) It should be noted that despite correct performance of the CRT discharge procedure, the CRT bulb capacitance can accumulate charge as the discharge stresses are relaxed. It follows, therefore, that ELECTRIC SHOCK HAZARD IS EVER PRESENT WHEN HANDLING THE CRT. The following guidelines must always be observed: Do not dispose of CRT by breaking the bulb unless wearing safety glasses and protective clothing If it becomes necessary to remove the CRT from its mounting within the mechanical package of the monitor, under no circumstances apply leverage to the glass bulb Never apply pressure or leverage to the tension band which may displace it from its initial position. This will minimise or nullify the implosion protection afforded by its presence. NOTE: Before opening any part of the monitor, switch off the unit by removing the ac ac supply voltage cable from the IEC connector. X-Ray Precaution The monitor includes critical mechanical and electrical parts which are essential for X-radiation safety. For continued safety, replace critical components indicated with a! (in a triangle) only with exact replacement parts given in the parts list. Operating high voltage for this unit is 0 kv at minimum brightness. Shock Haard The high voltage at which the tube is operated may be very dangerous. The monitor is operated from the ac supply voltage of 5 Vac or 40 Vac. Therefore, extreme care should be taken in the servicing or adjustment of any high voltage circuit. Caution should also be exercised when servicing or handling the power supply board, PS, because of the ac supply voltage and the rectified voltage at capacitors C7 and C8. Removal of the Top Cover The top cover is taken off by removing the 4 x Mach. screws that locate with the monitor side plates. See diagrams in Introduction and Mechanical Disassembly/Assembly section. Removal of the CRT. Switch off the monitor.. Remove the IEC connector from the monitor.. Remove the top cover by unscrewing the 4 x Mach. screws. 4. Remove the video amp./tubebase PCB, from CRT base. Remove the CRT ground wire, connected to the CRT braid, from the RGB Video/Tubebase PCB. NOTE: Adhesive will be used to secure the tubebase PCB to the tube neck. This must be removed by cutting. 5. Disconnect the degaussing coil by removing the CN4 connector from the PSU. 5.6-

14 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) 6. Remove the EHT cap from the anode of the CRT, MAKING SURE to discharge the anode. 7. Remove the CRT by unscrewing the 4 x M6 hexagonal standard nuts and washers. If the four inner platform nuts are required for the replacement tube, fit them before re-assembly takes place as they are required for positional adjustment of the tube. 8. Place the CRT on a bench with the CRT screen facing down, making sure to have a soft protective material between the screen and the bench to avoid damage or scratches to the CRT Re-assembly of the CRT The CRT is reassembled by following the procedure in reverse to that described above. NOTE: Adhesive MUST be applied to fully secure the tubebase to the tube neck. PCB Removal As all of the PCBs are wired together, all boards are still connected when the PCBs are removed.. Switch off the monitor.. Remove the ac supply IEC connector from rear of the monitor.. Remove the top cover. 4. Remove the EHT cap from the anode of the CRT MAKING SURE to discharge the anode by following the procedure as described above. 5. Remove the rear plate panel mounted IEC connector retaining screws, the connector should now be free to be moved with the PSU board. 6. Disconnect:- the degauss lead from connector CN4 on the PSU board the scan coils from connector CN5 on the Deflection board the sync. V & H connector from CN on the Deflection board the dc fan from connector CN8 on the PSU board RGB input drive from connector CN0 on the RGB Video amp./ Tubebase board 7. Partially disconnect the PSU PCB from the Deflection PCB by removing connector CN from the Scan PCB. Remove PSU PCB from its stand offs on which it is mounted. 8. Remove the Deflection PCB from the side plate by pulling the board away from the stand offs retaining it. 9. Remove the CRT ground wire connected to the CRT braid, from the RGB Video amp/tubebase board. Remove the RGB Video amp./tubebase board from the Tube neck. NOTE: Adhesive will be used to secure the tubebase PCB to the tube neck. This must be removed by cutting. The above assumes a complete board replacement without desoldering and that during manufacture all items will be connected together and have been tested. Replacement of the boards is a reversal of the procedure above

15 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) NOTE: Adhesive MUST be applied to fully secure the tubebase to the tube neck. WARNING To separate the PSU from the other PCBs, it will be necessary to desolder the feedback loop connection from the Diode Split transformer to the PSU Board. The polarity of this connection should be noted before removal (this is indicated by a black line on the insulation on F_B pulse), to ensure correct operation on re-assembly

16 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) SET-UP AND ADJUSTMENT SET-UP PROCEDURES In the event of repair and/or revision it is necessary to follow the adjustment procedure as described below. Test Equipment To carry out the adjustments, the following equipment will be required: Digital multimeter to measure up to kv dc Quantum colour character generator model 80C or PC with suitable software TV colour analyer Frequency Counter to measure the.47 kh for Horiontal Freq test Non-inductive screw driver for horiontal linearity adjustment. Insulated screwdriver for other adjustments Digital EHT meter (high impedance) to measure the A control volts 5 Vac and 40 Vac 50/60 H supply source Degaussing coil Dual trace oscilloscope with 0: probe. Set-up of the Character Generator Quantum colour character generator is set up to obtain the following data: MODE 640 x 400 Horiontal Vertical Dots/char. 8 Lines/char. Tot. char. 0 T. lines/char. 45 Displayed char. 80 Displayed rows Drive delay 8 Drive delay 4 Drive width Drive width 9 H kh.475 MH 5.76 Horiontal sync. - ve Vertical sync. + ve MODE 640 x 50 Horiontal Vertical Dots/char. 8 Lines/char. Tot. char. 00 T. lines/char. 45 Displayed char. 80 Displayed rows 8 Drive delay 8 Drive delay Drive width Drive width 9 H kh.475 MH 5.76 Horiontal sync. + ve Vertical sync. - ve 5.6-6

17 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) The three modes of operation are obtained by running the adequate diagnostic tests for the monitor giving the appropriate displays. Tests patterns required: MODE 640 x 480 Horiontal Vertical Dots/char. 8 Lines/char. Tot. char. 00 T. lines/char. 55 Displayed char. 80 Displayed rows 9 Drive delay 8 Drive delay 40 Drive width Drive width H kh.475 MH 5.76 Horiontal sync - ve Vertical sync. - ve Cross hatch pattern 9 vert. x 9 horiontal lines Full white page or white square of about 65 x 65 mm (.77 in. x.7 in) at centre Colour bar Full page of H characters. ADJUSTMENTS The interconnection assembly diagram below, shows all the adjustable devices and their locations on the PCB assemblies

18 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) DEFLECTION PCB VIN M 400 M 50 M 480 VR0 VR4 VR6 VR5 TR D8 C5 C7 C9 D7 TR V. SHIFT E-W TRAP VR6 VR8 IC7 VR5 D9 E-W PIN TR TR6 TR R56 R04 IC6 C6 C0 C L9 H. SHIFT T DZ6 C45 C50 DZ TR5 D5 C47 C49 +89V CN5 TR4 CN DZ5 HOR D5 D5 TR C4 TR5 C4 TR C D D0 IC8 D H. FREQ +V VR DZ4 IC C C4 C D9 D7 C D8 D6 C5 VR7 DZ9 H. POS D0 D D9 HTRS CLAMP TB TR7 D5 D0 C5 DZ7 D8 D7 C6 R C57 C54 BCL CONT C55 G C5 VR0 C86 VR9 D D SCAN COILS DEGUASS COIL CRT EHT DAG EARTH C58 VR7 WIDTH C4 C46 C48 D5 T5 T C80 +0V CSSK CD0 - SB0A CN0 TUBEBASE PCB C0 C0 C0 C VR0 VR0 VR0 BCL P C C05 IC0 SIGNAL INPUT, VERT. & HOR. SYNC INPUTS FROM 5-WAY CONNECTOR CN0 CSSK CD0 - TB0 CLAMP C9 C4 V TR4 C R7 C4 L0 IC0 TR8 C5 R46 R8 C5 5-WAY INPUT VR05 TR0 R H C H KB 0V VR04 L0 R4 R4 TR6 R70 R4 R5 C6 RT N/C R45 H KR G KG G N/C C6 DAG A-G R68 SG0 VR06 R R69 L0 R48 R40 R49 R9 G C8 C84 C8 C77 PTC R0 C78 C8 D48 IC9 D46 C0 C00 R0 R00 R99 R0 C7 D00 R05 SCR C76 R96 R97 R9 R79 C7 R84 C65 R8 C75 D40 D4 D54 C68 C69 F-PULSE R78 R8 R86 C85 IC9 R9 R95 R06 R89 C7 R94 R87 D44 C70 R90 TR0 VR-8 R88 C88 R9 C74 D50 R9 CSSK - FN CD0 - PS0-A C79 C6 T4 C80 D6 D4 C6 F L C6 C60 P4 P P R07 CN8 C89 P P5 C59 C58 L PSU PCB FAN D47 D45 D4 D4 D49 D DEGUASS 5.6-8

19 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) The metal plates diagram below shows the locations of the controls and the connectors. DEFLECTION PCB SCREW LOCKS LOCKING BOLT SIGNAL INPUT LOPT PSU PCB TUBEBASE PCB DEFLECTION PCB MAINS INPUT Brightness Contrast SIGNAL INPUT Top View with Cover Removed Rear Plate EARTHING STRAP 480 LINE H-FREQ 50 LINE 400 LINE VERT. LIN SERVICE H-PHASE VERT. SHIFT HOR. E-W LIN TRAP FOCUS CONTROL G E-W PIN HOR. WIDTH Left Hand Plate The monitor is powered up by applying 5 Vac or 40 Vac supply to the IEC connector. Apply Cross hatch test pattern signal, MODE (640 x 480) to the 5 pin D-type connector of the monitor

20 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Supply Voltage (+89 V) Adjustment The 89 Vdc Supply Control potentiometer, VR, is located in the SMPS circuit on PSU Board. Warm Up. Remove the top cover as previously described.. Connect to an ac supply source and switch on the Monitor.. Connect the positive terminal of the digital multimeter to TP7 and the negative terminal to. 4. Set BRIGHTNESS and CONTRAST controls to minimum. 5. Adjust potentiometer VR to give +89 Vdc + % on the digital multimeter. The monitor is allowed to warm up for 0 minutes before making any adjustments. If the monitor is switched on from cold, then its automatic degaussing system will demagnetise the CRT. If the monitor is powered up from its warm state and has been moved around, an external degaussing is required. Set the Contrast and Brightness controls (located on the Deflection board) to obtain a typical display. If components have been changed that effect the display illumination then all the RGB Video amp./tubebase potentiometers will require setting to midscale. However, if no changes to the display illumination have been made then adjustment of RGB Video amp./tubebase potentiometers will not be required. Horiontal Frequency Adjustment The HORIZ FREQ Control potentiometer, VR, is located on the Deflection board.. Connect the Frequency Counter terminals between the heater resistor R70 and.. Adjust VR until.47 kh is displayed on the Frequency Counter. On completion, remove the Freq Counter connections. Vertical Hold This adjustment is not required because the setting of the Vert. Hold is automatically set by the timing components connected between pins 4 and 6 of IC6. Horiontal Phase/Position The HORIZ PHASE POSITION Control potentiometer, VR7, is located on the Deflection Board.. Set the Horiontal Phase/Position control potentiometer, VR7, to its mechanical centre.. Adjust VR7 to have the image at the centre of the screen (see following diagram)

21 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) CRT SCREEN 40 mm mm 0 +/- mm mm CENTRE POINT 80 +/- mm E-W Correction The E-W PINCUSHION Correction Control potentiometer, VR5, and the E-W TRAPEZIUM Control potentiometer, VR8, are both located on the Deflection PCB. Potentiometer VR5 corrects the side pincushion effect (curved or bowed edges of the display). VR8 corrects the trapeoidal effect. Adjust potentiometers VR5 and VR8 for straight left and right hand sides of the picture. Horiontal Linearity The HORIZ. LIN. Control linearity coil, L9, is located on the Deflection PCB. Using the cross hatch pattern adjust L9 until the corresponding vertical columns of the cross hatch test pattern have as near as possible to equal width. This is measured along the centre part of the screen. Use a noninductive screwdriver. Horiontal Width The HORIZ. WIDTH Control potentiometer, VR7, is located on the Deflection PCB. Adjust VR7 so that the horiontal sie of the display measured along the centre of the screen (assuming that the side pincushion distortion is adjusted) is 80 mm + mm ( in). 5.6-

22 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Vertical Linearity The VERT. LIN. Control potentiometer, VR0, is located on the Deflection PCB. Ensure that MODE (640 x 480) signal is applied. VERT. LIN. control, VR0, is adjusted to obtain as near as possible to equal heights of the horiontal rows of the cross hatch test pattern at the upper and lower halves of the display. NOTE: The Vert. Lin. is interactive with Set Height (480) and Vert. Shift. Therefore, these two controls may need readjustments. Set Height (480 Lines) MODE The SET HEIGHT (480) Control potentiometer, VR5, is located on the Deflection PCB.. Apply MODE (640 x 480) signal.. Adjust potentiometer VR5 so that the vertical sie of the display, measured along the centre of the screen, is 0 mm + mm (5. in in). Vertical Shift The VERT. SHIFT Control potentiometer VR6 is located on the Deflection PCB. Adjust VR6 to have the display vertically (as close as possible) centred on the screen. Set Height (400 Lines) MODE The SET HEIGHT (400) Control potentiometer, VR4, is located on the Deflection PCB.. Apply MODE (640 x 400) signal to the monitor.. Adjust VR4 so that the vertical sie of the display measured along the centre of the screen is 0 mm + mm (5. in in). Set Height (50 Lines) MODE The SET HEIGHT (50) Control potentiometer, VR6, is located on the Deflection PCB.. Apply MODE (640 x 50) signal.. Adjust VR6 so that the vertical sie of the display measured along the centre of the screen is 0 mm + mm (5. in in). Focus The FOCUS control is located on the top part of the LOPT T.. Apply signal with full page H characters to the monitor.. Set BRIGHTNESS and CONTRAST to typical display.. Adjust FOCUS control for the best overall focus over the entire screen. 5.6-

23 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Cut-Off (Black Level), G and White Balance Adjustment The SCREEN GRID A Control is located at the bottom part of the LOPT T. Signal requirements: All White of about 65 x 65 mm sie at the centre of raster, mode 640 x 50. Signal input: 0.45 Vpp. Pre-adjust, (all the preset controls are located on Video amp./tubebase PCB) VR04 - B. BLK. LEVEL to its mid-way travel positions VR05 - R. BLK. LEVEL to its mid-way travel positions VR06 - G. BLK. LEVEL to its mid-way travel positions VR0 - B. GAIN to its maximum travel positions VR0 - G. GAIN to its maximum travel positions VR0 - R. GAIN to its maximum travel positions.. Set BRIGHTNESS and the CONTRAST controls to minimum.. Connect the digital EHT meter (high impedance) terminal to pin 7 of the CRT and and adjust G potentiometer (A/Screen grid), for 650 Vdc. 4. Adjust the BRIGHTNESS control until a raster is just visible. Depending on the tube, a predominant colour will be displayed, adjust the other two colour BLK/LEVEL potentiometers to give a grey raster. 5. Set the CONTRAST control to maximum, set the BRIGHTNESS control to minimum. 6. Connect an oscilloscope to TP (B), TP (G) and TP (R) cathodes in turn, adjusting the respective Gain potentiometers VR0, VR0 and VR0 to give a 8 V peak-to-peak video waveform display (black to white). 7. Set the Colour Pattern generator for Pattern X (pattern -). 8. Set the CONTRAST control to mid-position, adjust the BRIGHTNESS control until the background raster is just below visibility. 9. Using the Colour TV Analyer, adjust the GAIN potentiometers for the correct colour temperature. i.e., 900 deg. K (D9 Standard), X-Y coordinates are X = 0.8 and Y = Using the grey video squares of Pattern X displayed on the screen, check the colour temperature again with Colour Analyer to 900 degrees K, then if necessary adjust the BLK/LEVEL potentiometers to maintain the correct colour temperature. A certain amount of interaction between GAIN and BLK/LEVEL potentiometers will occur. Repeat steps (9) and (0) to compromise and get the best optimum 900 degrees K results.. Switch the Generator to the Full White page (Pattern -). Set the Brightness control so that the background raster is just extinguished and adjust Contrast to obtain 60 nits, verify with a Luminance Meter. 5.6-

24 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) TROUBLESHOOTING The flowcharts in this section are a guide to troubleshooting the monitor. FAULT SYMPTOMS No Raster Check +89 Vdc Rail + Vdc, + Vdc Rail Measure on the PSU PCB TP7, TP8 and TP9 respectively OK NG Check SMPS PCB Refer to Failure of SMPS Check HV operation & TR collector waveform Deflection PCB NG Check +89 Vdc on TP0 of T Check: Hori. Oscillator Hori. Deflection HV Circuit Check CRT Heaters NG Check 6. Vac RMS on CRT base Check R6 on Tubebase PCB OK Check CRT Heaters OK Check Screen Grid G volts approx. 650 Vdc Too Low Screen unit, G lead to Tubebase PCB, C6, R68 Tubebase PCB, LOPTx T fail OK Check +0 Vdc, +89 Vdc and + Vdc on Tubebase PCB 5.6-4

25 Low or Loss of R, G or B, Raster OK 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Check RGB input at TP5, TP6 TP6 and TP7 on Tubebase PCB NG Check for connection between PC Core and monitor OK Check Video input NG Check for clamp pulse at C09, at IC0 (LM0) TR8, IC0 pin 4. 9, 0 on Tubebase PCB Check TR06 for failure OK Check RGB at TR07, TR4, TR5 collectors on Tubebase PCB NG Check +89 V dc Check +0 V dc Check + V dc OK CRT cathode failure Abnormal Video on CRT Screen - Too Bright - Too Dark Assuming checks on RGB video input and output has been done satisfactory (see above) OK Check Brightness circuit connected to G and -0 Vdc OK NG Check T, D5, C54, R6, VR0 and blanking circuit Check G screen grid voltage setting If Vg measures incorrect: check NG Vg pot unit, C6, R68 T (LOPTx), CRT Socket CRT If Vg measures correct: check OK CRT failure 5.6-5

26 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) No Blanking - Visible Retrace Line on the Background Raster Check Blanking waveform on G Tubebase PCB NG Check Horiontal flyback and Vertical flyback at R9 and R64 on the Deflection PCB NG If no Hor. flyback check connection to T (LOPTx) If no Vert. flyback check connection back to Vert. output stage OK Check Hor. and Vert. Blanking on collector of TR7 NG Check TR7 and associated components No Synchronisation, Horiontal and Vertical Check Blanking waveform on G Tubebase PCB NG Check Horiontal flyback and Vertical flyback at R9 and R64 on the Deflection PCB NG If no Hor. flyback check connection to T (LOPTx) If no Vert. flyback check connection back to Vert. output stage OK Check Hor. and Vert. Blanking on collector of TR7 NG Check TR7 and associated components 5.6-6

27 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Horiontal Adjustable by Hori. Freq. control VR9 OK Adjust Check Hori. sync. input TP on Deflection PCB NG Check connection between PC Core and monitor OK Check Hori. sync. on TP5 on Deflection PCB OK NG Check IC, R4, C44, R4 and IC8 Check 5 Vdc on TP0, R7, D6, D8 and IC on Deflection PCB Check synchroniation of input circuit NG Check IC8 and associate components Vertical Check Vert. sync. input pin of IC on the Deflection PCB OK NG Check connection between PC Core and monitor Check 5 V on TP0, R8, D7, D9 and IC on Deflection PCB Check Vert. sync. on pin 5 of IC6 on the Deflection PCB OK Check Vert. oscillator circuit of IC6 NG Check IC6, pins and 4 and associated components on Deflection PCB Change IC

28 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Abnormal Vertical Height at 480 Line Mode Check + Vdc rail Measured after R8 on Deflection PCB Low Check R8 on Deflection PCB and + Vdc on Deflection PCB OK Check Vert. mode circuit by adjusting VR5 NG Check VR5 and associated components See Vertical Mode below OK Check Vert. deflection circuit section OK NG Failure IC6 or associated components on Deflection PCB/ Vert. Deflection Yoke Re-adjust VR5 (V. Height 480 lines) Vertical Mode Vertical Mode NG Failure condition To small V. Height at 400 & 50 lines Vibrating V. Height Check IC, TR, TR5 and DZ9 Readjust: VR6 (50 lines) VR4 (400 lines) 5.6-8

29 E-W Pincushion Distortion Failure 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Readjust E-W PIN VR5 and E-W TRAP VR8 on Deflection PCB NG No field parabola at base of TR6 check IC7 and associated components on Deflection PCB Field parabola present at TR6 base Check TR6, TR, TR, T and associated components for failure Poor Focus Readjust Focus control NG Failure: Focus control unit Focus lead CRT socket CRT 5.6-9

30 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Failure of Switched Mode Power Supply PS Check each rail: +89 Vdc on TP7 + Vdc on TP8 + Vdc on TP9 Adjust the dc Adjust control VR for +89 Vdc YES Low or no output anywhere No + Vdc output only Check D5, L & T4 Vdc winding O/C No + Vdc output only YES Check F, L and D4 YES Switch off the monitor ac supply and allow capacitors to discharge. Isolate PSU by disconnecting the PSU PCB from other PCBs. Insert suitable dummy load resistor between each rail and. Next turn on the power and check the +89 Vdc appears. YES Check C55, T, TR, D5, D5 & D5 on Deflection PCB NO Check that F is O/C NO YES Check D45 - D48, C75, C76 & associated components with supply rail (TP) Check waveform TP7 TR0 collector NO Check TR0, IC9 and associated components YES Check waveform at D6 anode NO Check C58 - C6 and T4 for SC YES Check D6, T4 +89 Vdc winding - O/C 5.6-0

31 COMPONENT LAYOUT DIAGRAMS Deflection PCB 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) HS R6 R C5 R5 R4 R7 C9 C C7 D4 D6 R0 TR R9 R TR4 R8 C9 D8 D9 D7 C6 V SHIFT VR6 H LIN L9 R5 E-W TRAP R56 VR8 IC7 R7 R6 C50 DZ0 R74 C0 R7 E-W PIN VR5 R59 TR TR R4 C44 R57 TR6 R58 R04 C5 C4 R60 VR7 WIDTH HS V LIN M 400 M 50 M 480 R VR0 VR4 VR6 VR5 C6 C8 C C45 C0 C8 TR5 C7 R R0 R47 D5 R8 R9 C R DZ C4 D6 R8 P +89V CN5 CN TR4 VER R4 P -V +89V V R R50 R5 R R5 R4 R48 R45 R45 C4 R4 IR5 IC8 C C4 R40 D H FREQ R5 VR C6 R4 C40 D C8 C VR7 H POS DZ4 C4 R C9 R0 D0 R5 C7 C R44 R7 D R49 C4 +V IC R4 HTRS CLAMP C5 HOR R9 DZ5 R55 T T8 P6 T C5 TR C47 C49 D5 T5 D5 T C48 HS R67 C46 D5 C R6 C5 D9 D8 D7 D6 R7 R8 DN SYNC.H D9 R7 R66 R65 DZ9 R05 C57 R64 SYNC.Y TR7 D0 DZ7 D8 D7 C54 R09 C5 G R6 VR0 R70 R6 VR9 CONT R56 BCL R68 R59 C55 R08 D D C86 +0V C90 CSSK CD0 - SB0 - F

32 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) PSU PCB R04 IC00 C0 C00 C7 R9 C66C67C68C69 R79R8 R80 R8R86 C7 R84 R00 C7 C85 C70 D8 C88 R05 R89 R87 F-BPULSE VR R88 CD0 - PS0 - F CSSK D50 R0 D4 D4 D49 D40 D4 D54 C8 CN7 L8 C77 PTC C84 C8 C78 C8 R0R00 R0 R99 D00 SCR R77 C76 R97 C65 R90 R85 C75 TR0 R94 R9 D44 R95 HS C79 C88 C74 D6 F D4 C6 C60 D5 C6 R07 CN8 C89 P P5 C59 C58 L L C R9 D9 8 T4 P4 P P R8 C67 CN4 D48 D46 D47D45 R05 R96 IC9 R78 CN6 -VE C6 e b

33 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Tubebase PCB (Front View) C C0 C0 VR0 C0 BCL CN0 P CN0 VR0 C C05 VR0 CLAMP CSSK CD0 - TB0 C9 C4 CSSK CD0 - TB0 - A C5 IC0 V TR4 D0 R46 TR8 R7 R8 L0 C C +89V TR0 0V VR04 R4 R5 R4 R6 R4 C4 R H N/C R70 VR05 KB H H R45 KR C6 6 N/C KG G L0 C5 C6 RT DAG A-G G R68 SG0 R69 VR06 R R40 R48 R9 R

34 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Tubebase PCB (Rear View) R06 R05 R04 D0 D0 R4 R65 C4 C C5 C5 R7 R9 C0 R59 TR7 R64 C R54 DZ04 C9 R0 C7 R0 R58 R0 D06 R55 R8 C8 R67 C R0 R56 C R6 C04 C08 R6 R R0 R7 R60 DZ0 C07 R6 C0 R8 TR R5 R8 R6 TR06 R6 R R R C09 R7 D05 R5 R56 D07 R57 TR09 R D0 TR9 C06 D04 DZ0 R5 TR05 R R5 C0 R50 C7 CD0 - TB0 - A SSSK FN

35 MONITOR REPLACEMENT PARTS LIST 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) Parts List for EMCO 0 Inch Colour Monitor (CD 004xx) - General Assembly NAME DESCRIPTION/TYPE QTY PART NUMBER CRT; Samsung MLCDX DEGAUSS COIL; Omega - Degauss coil FAN; ADDA AD09HB-A7 SCREW; M4x5 Supadriv Machine Screw 4 Sink Plated Yellow NUT; M4 Zinc Plated Yellow 4 WASHER; Shakeproof, 4x8x0.5mm 4 Zinc Plated Yellow PCB RICHCO 9 TCBS-8 SUPPORT; SCREW; No 6x/8 Self Tapper 0 SCREW; IEC Socket - Fixing WASHER; IEC Socket - Star Washer WASHER; 0BA Plane Washer 8 WASHER; 0BA Star Washer HANDLE; Plastic - For Cabinet Top SCREW; Handle - M4xmm Countersunk Bright Zinc Plated NUT; 5mm 8 SCREW; M x0mm Pan Head screws NUT; M nut NUT; For Screwlock-5 way D-type 4/40 UNC WASHER; Flat - for Screwlock-5 way D-type WASHER; Starwasher - for Screwlock-5 way D-type SCREW; M4x5mm Supadriv Taptite 8 Zinc Plated Yellow SCREW; No. 6x/8 Self Tapper 7 WASHER; M4 Star Washer 9 NUT; M4 Nuts 4 SCREW; M4x5mm, Cup/Pan Head 4 PSU PCB; PSU PCB Assembly CD0-PS0 DEFLCN. PCB; Deflcn PCB Assembly CD0-SB0 T/B PCB; Tubebase PCB Assembly CD0-TB0 PLATE; Rear Zinc Plated Yellow T.B.A. PLATE; LH Cover Zinc Plated Yellow T.B.A. PLATE; LH Side CRT Mount Zinc Plated Yellow T.B.A. PLATE; RH Side CRT Mount Zinc Plated Yellow T.B.A. PLATE; Top Cover - CRT Box Zinc Plated Yellow T.B.A. PLATE; Base Plate Zinc Plated Yellow T.B.A. STUD; For Jack Assembly Zinc Plated Yellow RING; Crimp Ring VID LEAD; Video Input Lead assembly Cable 00/FN CABLE TIES; Ty-raps 50x.5mm to UL 94V- BRAID; Earth braid for CRT DAG ground SPRING; For CRT Braided DAG ground wire assy Glue Tubebase to Tube Neck Adhesive RTV Sealant 5.6-5

36 56XX EMCO 0 INCH VGA COLOUR MONITOR (CD 004XX) NAME DESCRIPTION/TYPE QTY PART NUMBER Plunger; Plunger DVEL- Spring; Spring for Plunger Assy L=40mm x D=7mm 0.5mm Spring Steel Zinc plated Circlip; Circlip for Plunger D=7mm, d=5mm T=0.7mm Black finish Studs; Threaded Studs DVEL-4 Parts List for EMCO 0 Inch Colour Monitor - PCB Assembly NAME VALUE VOLTS WATTS TOL TYPE LOCATION RESISTORS R4 0R /4W Deflection PCB R5 0R /4W Deflection PCB R6 0R /4W Deflection PCB R7 K /4W Deflection PCB R8 K /4W Deflection PCB R8 56K /4W Deflection PCB R9 4K7 /4W Deflection PCB R0 R /4W Deflection PCB R 0R /4W Deflection PCB R 4K7 /4W Deflection PCB R 56K /4W Deflection PCB R4 K4 /4W Deflection PCB R5 0R /4W Deflection PCB R6 R0 /W Deflection PCB R7 K /4W Deflection PCB R8 R8 /4WF MFF Deflection PCB R9 0R /W Deflection PCB R0 0K /4W Deflection PCB R 40K /4W Deflection PCB R 47R /W Deflection PCB R R W Deflection PCB R4 470R /W Deflection PCB R5 K /4W Deflection PCB R6 0K /4W Deflection PCB R7 0K /4W Deflection PCB R8 0R8 /W Deflection PCB R9 K /4W Deflection PCB R40 47K W MF Deflection PCB R4 0K /4W Deflection PCB R4 N.F. R4 K /4W Deflection PCB R44 K /4W Deflection PCB R45 K7 /4W Deflection PCB R46 68K /4W Deflection PCB R47 M /4W % Deflection PCB R48 K /4W % MF Deflection PCB R49 K /4W Deflection PCB R50 470R /4W Deflection PCB R5 00R /W Deflection PCB 5.6-6