VX-G K SERVICE MANUAL INTEGRATED COLOR TV / VIDEO CASSETTE RECORDER BASIC TAPE MECHANISM OVD- SPECIFICATIONS POWER REQUIREMENTS... V AC, Hz POWER CONSUMPTION... W Standby W WEIGHT... Approx..8 kg (8. lbs.) DIMENSIONS... mm (W) x. mm (D) x 8. mm (H) ( / x /8 x / in.) PICTURE TUBE... in. ( cm V ), 9 degree deflection TUNER SYSTEM... Frequency synthesized tuner CHANNEL COVERAGE... UHF to 9 TV SYSTEM... I HORIZONTAL RESOLUTION... lines OPERATING TEMPERATURE... C to C VIDEO RECORDING SYSTEM... Rotary head helical scanning system VIDEO SIGNAL SYSTEM... PAL colour signal, lines, fields VIDEO HEAD... Azimuth heads USABLE CASSETTES... VHS video cassettes TAPE SPEED... RECORDING/PLAYBACK TIME... VIDEO INPUT... VIDEO OUTPUT... VIDEO S/N... AUDIO INPUT... AUDIO OUTPUT... AUDIO TRACK... PAL SP.9 mm/sec. LP.9 mm/sec. NTSC (playback SP only). mm/sec. PAL SP hours minutes max. with E- tape LP 8 hours minutes max. with E- tape NTSC (playback SP only) hours max. with T-8 tape.vp-p, ohm, unbalanced.vp-p, ohm, unbalanced db (nominal) SCART.8 dbs, K ohm RCA.8 dbs, K ohm SCART.8 dbs less than K ohm track (mono) Design and specifications are subject to change without notice. S/M Code. 9---N DATA
TABLE OF CONTENTS SPECIFICATIONS... TABLE OF CONTENTS... SERVICING NOTICES ON CHECKING... DISASSEMBLY INSTRUCTIONS REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS... REMOVAL OF DECK PARTS... REMOVAL OF ANODE CAP... KEY TO ABBREVIATIONS... SERVICE MODE LIST... PREVENTIVE CHECKS AND SERVICE INTERVALS... NOTE FOR THE REPLACING OF MEMORY IC... SERVICING FIXTURES AND TOOLS... PREPARATION FOR SERVICING... VCR TEST TAPE INTERCHANGEABILITY TABLE... MECHANICAL ADJUSTMENTS CONFIRMATION AND ADJUSTMENT... CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM... MECHANISM ADJUSTMENT PARTS LOCATION GUIDE... ELECTRICAL ADJUSTMENTS ADJUSTMENT PROCEDURE... BASIC ADJUSTMENTS... ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE... PURITY AND CONVERGENCE ADJUSTMENTS... TROUBLESHOOTING GUIDES... IC DESCRIPTIONS... SERVO TIMING CHART... SYSTEM SWITCH MODE... SEMICONDUCTOR BASE CONNECTIONS... BLOCK DIAGRAMS TV... Y/C/AUDIO/HEAD AMP/PIN/IN/OUT... MICON/OPERATION... PRINTED CIRCUIT BOARDS (OPERATION/DECK)... OPERATION SCHEMATIC DIAGRAM... DECK SCHEMATIC DIAGRAM... PRINTED CIRCUIT BOARDS (SYSCON)... Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM... MICON SCHEMATIC DIAGRAM... CHROMA/IF SCHEMATIC DIAGRAM... PIN/IN/OUT SCHEMATIC DIAGRAM... POWER SCHEMATIC DIAGRAM... SOUND AMP SCHEMATIC DIAGRAM... T'TEXT SCHEMATIC DIAGRAM... PRINTED CIRCUIT BOARDS (MAIN/CRT/POWER SW)... DEFLECTION SCHEMATIC DIAGRAM... TV POWER SCHEMATIC DIAGRAM... CRT SCHEMATIC DIAGRAM... INTERCONNECTION DIAGRAM... WAVEFORMS... MECHANICAL EXPLODED VIEW... MECHANICAL REPLACEMENT PARTS LIST... ACCESSORY REPLACEMENT PARTS LIST... CHASSIS EXPLODED VIEW (TOP VIEW)... CHASSIS EXPLODED VIEW (BOTTOM VIEW)... CHASSIS REPLACEMENT PARTS LIST... ELECTRICAL REPLACEMENT PARTS LIST... COVER A- A- B-, B- B-~B- B- C-, C- C- C-, C- C- C- C-, C- C- D-, D- D-, D- D- D- D-~D- D-, D- D- E-~E- F-~F- F- F- G-, G- H- H- H- I- I- I- I-~I- I- I-8 I-9 I- I- I- I- I- I- I- I- I-8 J-, J- K-, K- K- K- K- K- K- K-~K- A-
SERVICING NOTICES ON CHECKING. KEEP THE NOTICES As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual.. AVOID AN ELECTRIC SHOCK There is a high voltage part inside. Avoid an electric shock while the electric current is flowing.. USE THE DESIGNATED PARTS The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety. Therefore, the part which is replaced should be used the part which has the same character. Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark, the designated parts must be used.. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING There are parts which use the insulation material such as a tube or tape for safety, or which are assembled in the condition that these do not contact with the printed board. The inside wiring is designed not to get closer to the pyrogenic parts and high voltage parts. Therefore, put these parts in the original positions.. TAKE CARE TO DEAL WITH THE CATHODE-RAY TUBE In the condition that an explosion-proof cathode-ray tube is set in this equipment, safety is secured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock. Take enough care to deal with it.. AVOID AN X-RAY Safety is secured against an X-ray by considering about the cathode-ray tube and the high voltage peripheral circuit, etc. Therefore, when repairing the high voltage peripheral circuit, use the designated parts and make sure not modify the circuit. Repairing except indicates causes rising of high voltage, and it emits an X-ray from the cathode-ray tube.. PERFORM A SAFETY CHECK AFTER SERVICING Confirm that the screws, parts and wiring which were removed in order to service are put in the original positions, or whether there are the portions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that. (INSULATION CHECK PROCEDURE). Unplug the plug from the AC outlet.. Remove the antenna terminal on TV and turn on the TV.. Insulation resistance between the cord plug terminals and the eternal exposure metal [te ] should be more than M ohm by using the V insulation resistance meter [te ].. If the insulation resistance is less than M ohm, the inspection repair should be required. [te ] If you have not the V insulation resistance meter, use a Tester. [te ] External exposure metal Antenna terminal Earphone jack A-
DISASSEMBLY INSTRUCTIONS. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS - BACK CABINET (Refer to Fig. -). Remove the screws.. Remove the screws.. Remove the screws which are used for holding the Back Cabinet.. Remove the AC cord from the AC cord hook.. Remove the Back Cabinet in the direction of arrow. Front Cabinet - TV/VCR BLOCK (Refer to Fig. -). Remove the screws.. Disconnect the following connectors (CP, CP, CP, CP, CP and CP).. Unlock the support.. Remove the TV/VCR Block in the direction of arrow. Front Cabinet TV/VCR Block UP TO RELEASE Fig. - Fig. - - CRT PCB (Refer to Fig. -) CAUTION BEFORE REMOVING THE ANODE CAP, DISCHARGE ELECTRICITY BECAUSE IT CONTAINS HIGH VOLTAGE. BEFORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB, UNPLUG THE POWER CORD FROM THE AC SOURCE. Back Cabinet. Remove the Anode Cap. (Refer to REMOVAL OF ANODE CAP). Disconnect the following connectors (CP8 and CP8).. Remove the CRT PCB in the direction of arrow. - MAIN PCB (Refer to Fig. -). Remove the screw.. Remove the Main PCB Holder.. Remove the screws.. Remove the screws.. Disconnect the following connectors (CP8, CP8 and CP8).. Remove the Main PCB in the direction of arrow. Main PCB Holder Main PCB Front Cabinet CRT PCB VCR Block Fig. - Fig. - B-
DISASSEMBLY INSTRUCTIONS - DECK SHIELD PLATE (Refer to Fig. -). Remove the screws.. Remove the screws.. Remove the screw.. Remove the Deck Shield Plate in the direction of arrow (A).. Remove the screw.. Remove the Shield Plate Bottom in the direction of arrow (B). Deck Chassis Deck Shield Plate (A) Syscon PCB Fig. - - JACK PLATE AND SYSCON PCB (Refer to Fig. -) (B) VCR Block. Remove the screw.. Remove the Syscon PCB in the direction of arrow (A).. Remove the screws.. Unlock the supports.. Remove the Jack Plate in the direction of arrow (B). Jack Plate Shield Plate Bottom Syscon PCB (B) Fig. - - DECK CHASSIS (Refer to Fig. -). Remove the screws.. Disconnect the following connectors (CD, CP, CP, CP, CP, CP and CP).. Remove the Deck Chassis in the direction of arrow. (A) Deck Holder Fig. - B-
DISASSEMBLY INSTRUCTIONS. REMOVAL OF DECK PARTS - TOP BRACKET (Refer to Fig. -). Remove the screws.. Slide the supports and remove the Top Bracket. NOTE When you install the Top Bracket, install the screw () first, then install the screw (). NOTE When you install the Tape Guide L, install as shown in the circle of Fig. --B. (Refer to Fig. --B) Tape Guide L REC Lever () () Top Bracket Top Bracket The REC Lever is not installed on the Video Cassette Player. Fig. --B Main Chassis Main Chassis Screw Torque ±.kgf cm Fig. - - FLAP LEVER/TAPE GUIDE R (Refer to Fig. -). Move the Cassette Holder Ass'y to the back side.. Remove the Polyslider Washer.. Remove the Flap Lever.. Unlock the supports and remove the Tape Guide R. - CASSETTE HOLDER ASS'Y (Refer to Fig. -). Move the Cassette Holder Ass'y to the front side.. Push the Locker R to remove the Cassette Side R.. Remove the Cassette Side L. Main Chassis Cassette Side R Locker R Tape Guide R Flap Lever Cassette Side L Main Chassis Fig. - Main Chassis Fig. - - TAPE GUIDE L (Refer to Fig. --A). Move the Cassette Holder Ass'y to the back side.. Unlock the supports and remove the Tape Guide L.. Remove the REC Lever. (Recorder only) - CASSETTE SIDE L/R (Refer to Fig. -). Remove the Locker Spring.. Unlock the supports and then remove the Cassette Side L/R. NOTE When you install the Cassette Side L/R, be sure to move the Locker L/R after installing. Locker Spring REC Lever Locker R Tape Guide L Cassette Side R Locker L Cassette Side L Fig. - Main Chassis The REC Lever is not installed on the Video Cassette Player. Fig. --A B-
DISASSEMBLY INSTRUCTIONS - LINK ASS'Y (Refer to Fig. -). Set the Link Ass'y to the Eject position.. Remove the (A) side of the Link Ass'y first, then remove the (B) side. Link Ass'y -9 TENSION ASS'Y (Refer to Fig. -9-A). Move the Inclined S Ass'y to the back side.. Unlock the support and remove the S Reel Stopper.. Remove the Tension Spring.. Unlock the support and remove the Tension Arm Ass'y.. Remove the Tension Adjust.. Unlock the supports and remove the Tension Band Ass'y.. Unlock the support and remove the Tension Holder. Tension Adjust (A) Link Ass'y (B) Tension Band Ass'y Main Chassis Main Chassis Fig. - Tension Spring Tension Arm Ass'y - LOADING MOTOR ASS'Y (Refer to Fig. -). Remove the Link Lever.. Remove the Dumper Spring.. Remove the screws.. Unlock the support and remove the Loading Motor Ass'y.. Unlock the supports and remove the Deck PCB (BOT). Loading Motor Ass'y Dumper Spring S Reel Stopper Tension Holder Inclined S Ass'y Fig. -9-A NOTE When you install the Tension Adjust, install as shown in Fig. -9-B. (Refer to Fig. -9-B) Adjust the direction of the Marker to inside. Main Chassis Fig. -9-B Deck PCB (BOT) Link Lever - T BRAKE ASS'Y (Refer to Fig. -). Remove the T Brake Spring.. Remove the T Brake Ass'y. Screw Torque ±.kgf cm Fig. - T Brake Ass'y -8 SENSOR COVER L (Refer to Fig. -8). Unlock the support and remove the Sensor Cover L.. Unlock the supports and remove the Deck PCB (EOT). T Brake Spring Main Chassis Sensor Cover L Deck PCB (EOT) Fig. -8 Fig. - B-
DISASSEMBLY INSTRUCTIONS - S REEL/T REEL ASS'Y (Refer to Fig. -). Remove the Idler Ass'y.. Remove the S Reel and T Reel Ass'y.. Remove the Polyslider Washers. NOTE. Take care not to damage the gears of the S Reel, T Reel Ass'y and Idler Ass'y.. The Polyslider Washer may be remained on the back of the reel.. Take care not to damage the shaft.. Do not touch the section "A" of S Reel and T Reel Ass'y. (Use gloves.) (Refer to Fig. -) Do not adhere the stains on it.. When you install the reel, clean the shaft and oil it (KYODO OIL Slidas #). (If you do not oil, noise may be heard in FF/REW mode.). After installing the reel, adjust the height of the reel. (Refer to MECHANICAL ADJUSTMENT) S Reel Idler Ass'y (A) T Reel Ass'y (A) NOTE. Do not touch the Pinch Roller. (Use gloves.). When you install the Pinch Roller Ass'y, install as shown in the circle. (Refer to Fig. --B) Fig. --B - A/C HEAD (Refer to Fig. --A). Remove the screw.. Remove the A/C Head Base.. Remove the screws.. Remove the A/C Head and A/C Head Spring. NOTE. Do not touch the A/C Head. (Use gloves.). When you install the A/C Head Spring, install as shown in Fig. --B. (Refer to Fig. --B). When you install the A/C Head, tighten the screw () first, then tighten the screw (), finally tighten the screw (). Fig. - () () () A/C Head - PINCH ROLLER ASS'Y/P ARM ASS'Y (Refer to Fig. --A). Remove the P Spring.. Remove the screw.. Unlock the supports and remove the Cassette Opener.. Remove the Pinch Roller Ass'y, Pinch Roller Lever and P Arm Ass'y. A/C Head Spring A/C Head Base Fig. --A P Spring Cassette Opener Pinch Roller Ass'y Spring Position Fig. --B P Arm Ass'y Pinch Roller Lever - FE HEAD (RECORDER ONLY) (Refer to Fig. -). Remove the screw.. Remove the FE Head. Main Chassis FE Head Screw Torque ±.kgf cm Fig. --A The FE Head is not installed on the Video Cassette Player. Fig. - B-
DISASSEMBLY INSTRUCTIONS - AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. -). Unlock the support and remove the AHC Ass'y.. Remove the screws.. Remove the Cylinder Unit Ass'y. E-Ring Main Cam Middle Gear NOTE When you install the Cylinder Unit Ass'y, tighten the screws from () to () in order while pulling the Ass'y toward the left front direction. Pinch Roller Cam Link Lever Spacer Joint Gear P Cam Cylinder Unit Ass'y () () () AHC Ass'y Fig. --A NOTE When you install the Pinch Roller Cam, P Cam and Main Cam, align each marker. (Refer to Fig. --B) Pinch Roller Cam Check the hole of Main Chassis can be seen. P Cam Screw Torque ±.kgf cm Fig. - Marker Main Cam - CAPSTAN DD UNIT (Refer to Fig. -). Remove the Capstan Belt.. Remove the screws.. Remove the Capstan DD Unit. Fig. --B Capstan Belt Capstan DD Unit Screw Torque ±.kgf cm Fig. - - MIDDLE GEAR/MAIN CAM (Refer to Fig. --A). Remove the Polyslider Washer, then remove the Middle Gear.. Remove the E-Ring, then remove the Main Cam, Link Lever Spacer and P Cam.. Remove the Polyslider Washer, then remove the Pinch Roller Cam.. Remove the Polyslider Washer, then remove the Joint Gear. -8 CLUTCH ASS'Y (Refer to Fig. -8). Remove the Polyslider Washer.. Remove the Clutch Ass'y, Ring Spring, Ring Clutch, Gear Clutch and Polyslider Washer. NOTE When you install the Clutch Ass'y, oil the shaft (KYODO OIL Slidas #). Gear Clutch Clutch Ass'y Ring Spring Ring Clutch App. mm Fig. -8 B-
DISASSEMBLY INSTRUCTIONS -9 LOADING GEAR S/T ASS'Y (Refer to Fig. -9-A)....... 8. 9... Remove the E-Ring and remove the Main Loading Gear. Remove the Capstan Brake Spring. Slide the Main Rod and remove the Capstan Brake Arm Ass'y. Remove the Main Rod. Remove the Tension Lever. Unlock the supports and remove the Clutch Lever. Remove the screw. Remove the LED Reflector. Remove the Loading Arm S Ass'y and Loading Arm T Ass'y. Remove the Loading Gear S and Loading Gear T. Remove the Loading Gear Spring. Capstan Brake Spring Main Rod Capstan Brake Arm Ass'y Main Loading Gear - INCLINED S/T ASS'Y (Refer to Fig. -). Unlock the support and remove the P Cover.. Remove the S-S Brake Spring.. Unlock the support and remove the Loading Gear Holder.. Remove the S-S Brake Arm.. Remove the Inclined S.. Remove the Inclined T.. Remove the screws, then remove the Guide Roller. NOTE Do not touch the roller of Guide Roller. Loading Gear Holder Guide Roller S-S Brake Spring S-S Brake Arm Guide Roller Inclined S Clutch Lever Tension Lever Loading Gear T Inclined T P Cover Loading Gear Spring Loading Arm T Ass'y LED Reflector Loading Gear S Loading Gear Spring Screw Torque. ±.kgf cm Fig. - Loading Arm S Ass'y Fig. -9-A NOTE When you install the Loading Arm S Ass'y, Loading Arm T Ass'y and Main Loading Gear, align each marker. (Refer to Fig. -9-B) Marker Main Loading Gear Marker Loading Arm T Ass'y Loading Arm S Ass'y Fig. -9-B B-
DISASSEMBLY INSTRUCTIONS. REMOVAL OF ANODE CAP Read the following NOTED items before starting work. * After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage. * Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged. REMOVAL. Follow the steps as follows to discharge the Anode Cap. (Refer to Fig. -.) Connect one end of an Alligator Clip to the metal part of a flat-blade screwdriver and the other end to ground. While holding the plastic part of the insulated Screwdriver, touch the support of the Anode with the tip of the Screwdriver. A cracking noise will be heard as the voltage is discharged.. After one side is removed, pull in the opposite direction to remove the other. NOTE Take care not to damage the Rubber Cap. INSTALLATION. Clean the spot where the cap was located with a small amount of alcohol. (Refer to Fig. -.) Location of Anode Cap on the CRT Fig. - NOTE Confirm that there is no dirt, dust, etc. at the spot where the cap was located.. Arrange the wire of the Anode Cap and make sure the wire is not twisted.. Turn over the Rubber Cap. (Refer to Fig. -.) Screwdriver CRT Support Alligator Clip on the CRT Fig. - Fig. -. Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support. (Refer to Fig. -.). Insert one end of the Anode Support into the anode button, then the other as shown in Fig. -. Rubber Cap CRT Support Fig. - CRT Support. Confirm that the Support is securely connected.. Put on the Rubber Cap without moving any parts. Fig. - B-
KEY TO ABBREVIATIONS A B C D E F G H A/C ACC AE AFC AFT AFT DET AGC AMP ANT A.PB APC ASS'Y AT AUTO A/V BGP BOT BPF BRAKE SOL BUFF B/W C CASE CAP CARR CH CLK CLOCK (SY-SE) COMB CONV CPM CTL CYL CYL-M CYL SENS DATA (SY-CE) db DC DD Unit DEMOD DET DEV E EF EMPH ENC ENV EOT EQ EXT F FBC FE FF FG FL SW FM FSC FWD GEN H.P.F Audio/Control Automatic Color Control Audio Erase Automatic Frequency Control Automatic Fine Tuning Automatic Fine Tuning Detect Automatic Gain Control Amplifier Antenna Audio Playback Automatic Phase Control Assembly All Time Automatic Audio/Video Burst Gate Pulse Beginning of Tape Bandpass Filter Brake Solenoid Buffer Black and White Capacitance, Collector Cassette Capstan Carrier Channel Clock Clock (Syscon to Servo) Combination, Comb Filter Converter Capstan Motor Control Cylinder Cylinder-Motor Cylinder-Sensor Data (Syscon to Servo) Decibel Direct Current Direct Drive Motor Unit Demodulator Detector Deviation Emitter Emitter Follower Emphasis Encoder Envelope End of Tape Equalizer External Fuse Feed Back Clamp Full Erase Fast Forward, Flipflop Frequency Generator Front Loading Switch Frequency Modulation Frequency Sub Carrier Forward Generator Ground High Pass Filter I K L M N O P R S H.SW Hz IC IF IND INV KIL L LED LIMIT AMP LM, LDM LP L.P.F LUMI. M MAX MINI MIX MM MOD MPX MS SW NC NR OSC OPE PB PB CTL PB-C PB-Y PCB P. CON PD PG P-P R REC REC-C REC-Y REEL BRK REEL S REF REG REW REV, RVS RF RMC RY S. CLK S. COM S. DATA SEG SEL SENS SER SI SIF SO SOL SP STB SW Head Switch Hertz Integrated Circuit Intermediate Frequency Indicator Inverter Killer Left Light Emitting Diode Limiter Amplifier Loading Motor Long Play Low Pass Filter Luminance Motor Maximum Minimum Mixer, mixing Monostable Multivibrator Modulator, Modulation Multiplexer, Multiplex Mecha State Switch n Connection ise Reduction Oscillator Operation Playback Playback Control Playback-Chrominance Playback-Luminance Printed Circuit Board Power Control Phase Detector Pulse Generator Peak-to Peak Right Recording Recording-Chrominance Recording-Luminance Reel Brake Reel Sensor Reference Regulated, Regulator Rewind Reverse Radio Frequency Remote Control Relay Serial Clock Sensor Common Serial Data Segment Select, Selector Sensor Search Mode Serial Input Sound Intermediate Frequency Serial Output Solenoid Standard Play Serial Strobe Switch C-
KEY TO ABBREVIATIONS S T U V X Y SYNC SYNC SEP TR TRAC TRICK PB TP UNREG V VCO VIF VP V.PB VR V.REC VSF VSR VSS V-SYNC VT X'TAL Y/C Synchronization Sync Separator, Separation Transistor Tracking Trick Playback Test Point Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display Video Playback Variable Resistor Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source Vertical-Synchronization Voltage Tuning Crystal Luminance/Chrominance C-
SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, Unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key for more than seconds. The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least minutes before Power On or alternatively, discharge backup capacitor. Set Key Remocon Key Operations VOL. (-) MIN VOL. (-) MIN VOL. (-) MIN VOL. (-) MIN VOL. (-) MIN VOL. (-) MIN VOL. (-) MIN 8 VOL. (-) MIN 9 Initialization of the factory. NOTE Do not use this for the normal servicing. Horizontal position adjustment of OSD. NOTE Also can be adjusted by using the Adjustment MENU. Refer to the "ELECTRICAL ADJUSTMENT" (OSD HORIZONTAL). Adjust the PG SHIFTER automatically. Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER). Adjust the PG SHIFTER manually. Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER). Adjusting of the Tracking to the center position. NOTE Also can be adjusted by pressing the ATR button for more tan seconds during PLAY. POWER ON total hours and PLAY/REC total hours are displayed on the screen. Refer to the "PREVENTIVE CHECKS AND SERVICE INTERVALS" (CONFIRMATION OF USING HOURS). Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "NOTE FOR THE REPLACING OF MEMORY IC". Writing of EEPROM initial data. NOTE Do not use this for the normal servicing. Display of the Adjustment MENU on the screen. Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment). Method Press the ATR button on the remote control for more than seconds during PLAY. Make the short circuit between the test point of SERVICE and the. Operations Adjusting of the Tracking to the center position. Refer to the "MECHANICAL ADJUSTMENT" (GUIDE ROLLER) and "ELECTRICAL ADJUSTMENT" (PG SHIFTER). The EOT/BOT/Reel sensor do not work at this moment. Refer to the "PREPARATION FOR SERVICING" C-
PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. Time Parts Name hours Audio Control Head Full Erase Head (Recorder only), hours, hours, hours, hours tes Clean those parts in contact with the tape. Capstan Belt Pinch Roller Capstan DD Unit Clean the rubber, and parts which the rubber touches. Loading Motor Tension Band Capstan Shaft Tape Running Guide Post Replace when rolling becomes abnormal. Cylinder Unit Clean the Head Clean Replace CONFIRMATION OF USING HOURS POWER ON total hours and PLAY/REC total hours can be checked on the screen. Total hours are displayed in system of notation. NOTE The confirmation of using hours will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least minutes before Power On or alternatively, discharge backup capacitor.. Set the VOLUME to minimum.. While holding down VOLUME button on front cabinet, press key on remote control for more than seconds.. After the confirmation of using hours, turn off the power. INIT 8 POWER ON PLAY/REC Initial setting content of MEMORY IC. POWER ON total hours. PLAY/REC total hours. ( x x x thousands digit value) + ( x x hundreds digit value) + ( x tens digit value) + (ones digit value) C-
PREVENTIVE CHECKS AND SERVICE INTERVALS CLEANING NOTE After cleaning the heads with isopropyl alcohol, do not run a tape until the heads dry completely. If the heads are not completely dry and alcohol gets on the tape, damage may occur.. AUDIO CONTROL HEAD Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol and clean the audio control head by wiping it horizontally. Clean the full erase head in the same manner. (Refer to the figure below.). TAPE RUNNING SYSTEM When cleaning the tape transport system, use the gauze moistened with isopropyl alcohol.. CYLINDER Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol. Hold it to the cylinder head softly. Turn the cylinder head counterclockwise to clean it (in the direction of the arrow). (Refer to the figure below.) NOTE Do not exert force against the cylinder head. Do not move the chamois upward or downward on the head. Use the chamois one by one. Audio Control Head Cylinder Head C-
NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE. NOTE Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least minutes before Power On or alternatively, discharge backup capacitor. ADDRESS DATA ADDRESS D DATA B ADDRESS DATA A ADDRESS DATA F E A E F A9 B C D F 8 9 A F E E B 8 F F C 8 D F E B 8 C A F 9 A B C8 8 A F 8 C 9 8 8 ADDRESS DATA 8 9 A B C C D B E F.. Table Enter DATA SET mode by setting VOLUME to minimum. While holding down VOLUME button on front cabinet, press key on remote control for more than seconds. ADDRESS and DATA should appear as FIG. ADDRESS INIT 8 POWER ON PLAY/REC DATA Fig.. ADDRESS is now selected and should "blink". Using the PLAY or STOP button on the remote, step through the ADDRESS until required ADDRESS to be changed is reached.. Press ENTER to select DATA. When DATA is selected, it will "blink".. Again, step through the DATA using PLAY or STOP button until required DATA value has been selected.. Pressing ENTER will take you back to ADDRESS for further selection if necessary.. Repeat steps to until all data has been checked. 8. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input. The unit will now have the correct DATA for the new MEMORY IC. C-
SERVICING FIXTURES AND TOOLS (For head speed model, head model) VHS Alignment Tape JGE (TTV-P) JGF (TTV-PL) JGU (VP S-X ) (For head speed model) VHS Alignment Tape JGC (TTV-P) JGD (TTV-PL) JGV (VP S-X ) JGB Adapter JGE Dial Torque Gauge (~9gf cm) JGF (~gf cm) JG Post Adjustment Screwdriver Part. SV-TG-- (small) JG X Value Adjustment Screwdriver JG Master Plane JGA Reel Disk Height Adjustment Jig JGA Torque Tape (VHT-) JG Cable Parts. SJ-G-- JGC Cable ( Pins) Parts. SJ-G-C- JGD Cable ( Pins) Parts. SJ-G-D- JGY Cable ( Pins) Parts. SJ-G-Y- Tentelometer Part. JGE JGF JGU JGC JGD JGV JGB JGE JGF JG JG JG/JGA JGA JG JGC/JGD JGY Remarks Stair Steps, KHz (For head speed model, head model) Color Bar, KHz (For head speed model, head model) X Value Adjustment (For head speed model, head model) Stair Steps, KHz (For head speed model) Color Bar, KHz (For head speed model) X Value Adjustment (For head speed model) VSR Torque, Brake Torque (S Reel/T Reel Ass'y) Brake Torque (T Reel Ass'y) VSR Torque, Brake Torque (S Reel) Guide Roller Adjustment X Value Adjustment Reel Disk Height Adjustment Playback Torque, Back Tension Torque During Playback Used to connect the test point of SERVICE and GROUND Used to connect the Syscon PCB and Main PCB Used to connect the Syscon PCB and CRT PCB C-
PREPARATION FOR SERVICING Basic Servicing Position (In case of needing to check on all blocks). Unplug the connector CP, CP and CP, then remove the TV/VCR Block from the set.. Unplug the connector CP8, CP8 and CP8, then remove the Main PCB from the VCR Block.. Connect as shown in the below figure using the Service Fixture. Connect the Syscon PCB to the Main PCB with the cable JGC and JGD. Connect the Syscon PCB to the CRT PCB with the cable JGY.. Remove the Operation PCB from the set, then connect it with the Syscon PCB. If necessary, connect CP. (Front A/V Jack Input Terminal). Short circuit between TP and with the cable JG. (The EOT, BOT and Reel Sensor do not work at this moment.). At that time, the STOP/EJECT button is available to insert and eject the Cassette Tape. Front Cabinet CRT PCB CP8 CP8 Main PCB JGY CP8 JGD CD8 Syscon PCB CD8 JGC CD8 TP CP To Ground JG Operation PCB CD CD C-
PREPARATION FOR SERVICING Servicing Position for Main PCB (In case of needing to check on Main PCB) It's possible to get the Servicing Position without the extension Jig if you arrange the unit as shown below. (But L connection can not be done, Degauss circuit will not operate.) L ( Pin) Be careful for the short circuit. Main PCB VHS Tape (Put the Tape under the FBT.) C-
VCR TEST TAPE INTERCHANGEABILITY TABLE There are two types of the new alignment tape CH-B (for NTSC) and CH- (for PAL). On each tape four signals () - () are recorded for the times and in the order shown below. () 8min. ---> () min. ---> () min. ---> () min. The TTV-MP (for M-PAL), TTV-MS (for MESECAM) and TTV-S (for SECAM) alignment tapes have the same contents as the previous tapes. w in use TYPE New TYPE Method Model Contents* Model Contents* Application TTV-N NTSC, Color, khz, SP CH-B() NTSC, Stairsteps, khz, SP PB-Y Level/General electrical ADJ. Head ACE Height/Tilt ADJ. TTV-NE NTSC, Color, khz, EP CH-B() * NTSC, Color, khz, EP Switching position ADJ. NTSC TTV-N NTSC, Stairsteps, khz, SP CH-B() NTSC, Stairsteps, khz, SP Head ACE Azimuth ADJ. TTV-N (SCV-998) NTSC, Color, khz, SP CH-B() NTSC, Color, khz, EP FM envelope ADJ. X-Value ADJ. TTV-NA NTSC, Stairsteps, khz, SP, HiFi Hz CH-B() NTSC, Color, sound SP, HiFi Hz HiFi Audio PB Level ADJ. TTV-P PAL, Color, khz, SP CH-() * PAL, Stairsteps, khz, SP Switching position ADJ. PB-Y Level/General electrical ADJ. Head ACE Height/Tilt ADJ. PAL TTV-PL PAL, Color, khz, LP CH-() PAL, Color, khz, LP Switching position. (LP Model) FM Envelope ADJ. (LP Model) X-Value ADJ. (LP Model) TTV-P PAL, Stairsteps, khz, SP CH-() PAL, Stairsteps, khz, SP Head ACE Azimuth ADJ. FM Envelope ADJ. (SP Model) X-Value ADJ. (SP Model) TTV-P PAL, Stairsteps, khz, SP, HiFi, khz CH-() PAL, Color, sound SP, HiFi Hz HiFi Audio PB Level ADJ. TTV-P PAL, Color, Hz, SP, HiFi khz Changed. FM Filter ADJ. *. Described in the order of color format. Video signal. Linear audio. Tape speed and Hi-Fi audio. *. Use CH-B () - () with models used exclusively in the SP mode. *. Use CH- () and () when it is necessary to observe the chroma signal. C-
MECHANICAL ADJUSTMENTS. CONFIRMATION AND ADJUSTMENT Read the following NOTES before starting work. Place an object which weighs between g~g on the Cassette Tape to keep it steady when you want to make the tape run without the Cassette Holder. (Do not place an object which weighs over g.) When you activate the deck without the Cassette Holder, short circuit between TP and. (Refer to ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE) In this condition the BOT/EOT/Reel Sensor will not function. - CONFIRMATION AND ADJUSTMENT OF REEL DISK HEIGHT. Turn on the power and set to the STOP mode.. Set the master plane (JG) and reel disk height adjustment jig (JGA) on the mechanism framework, taking care not to scratch the drum, as shown in Fig. - -A.. Confirm that "A" of the reel disk is lower than "B" of the reel disk height adjustment jig (JGA), and is higher than "C". If it is not enough height, adjust to (+., -) mm with the height adjustment washer.. Adjust the other reel in the same way. - CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION. Set to the PLAY mode.. Adjust the Tension Adjust until the edge of the Tension Arm is positioning within.mm range from the standard line center of Main Chassis. After this adjustment, confirm that the cut position is located in "A" area as shown in Fig. --B. If it is located in "B" area, adjust again.. While turning the S Reel clockwise, confirm that the edge of the Tension Arm is located in the position described above. Standard line of Main Chassis Tension Adjust Tension Arm.mm (Adjusting range) Standard line center of Main Chassis Fig. --A Master Plane (JG) Reel Disk Height Adjustment Jig (JGA) Cut Position (A) (B) Tension Adjust Fig. --B - CONFIRMATION OF PLAYBACK TORQUE AND BACK TENSION TORQUE DURING PLAYBACK Reel Disk Reel Disk Height Adjustment Jig (JGA) Fig. --A. Load a video tape (E-8) recorded in standard speed mode. Set the unit to the PLAY mode.. Install the tentelometer as shown in Fig. -. Confirm that the meter indicates ± gf in the beginning of playback. USING A CASSETTE TYPE TORQUE TAPE (JGA) (+., -)mm Master Plane (JG) (B) (C). After confirmation and adjustment of Tension Post position (Refer to item -), load the cassette type torque tape (JGA) and set to the PLAY mode.. Confirm that the right meter of the torque tape indicates ~gf cm during playback in SP mode.. Confirm that the left meter of the torque tape indicates ~gf cm during playback in SP mode. (A) Tentelometer Height Adjustment Washer.x.xT..X.xT. Fig. --B Video Tape P Post Guide Roller Fig. - D-
MECHANICAL ADJUSTMENTS - CONFIRMATION OF VSR TORQUE. Operate within ~ seconds after the reel disk begins to turn.. Install the Torque Gauge (JGF) and Adapter (JGB) on the S Reel. Set to the Rewind mode. (Refer to Fig.-). Then, confirm that it indicates ~8gf cm. NOTE Install the Torque Gauge on the reel disk firmly. Press the REW button to turn the reel disk. - CONFIRMATION OF REEL BRAKE TORQUE (S Reel Brake) (Refer to Fig. -). Set to the STOP mode.. Move the Idler Ass'y from the S Reel.. Install the Torque Gauge (JGF) and Adapter (JGB) on the S Reel. Turn the Torque Gauge (JGF) clockwise.. Then, confirm that it indicates ~gf cm. (T Reel Brake) (Refer to Fig. -). Set to the STOP mode.. Move the Idler Ass'y from the T Reel Ass'y.. Install the Torque Gauge (JGE) and Adapter (JGB) on the T reel. Turn the Torque Gauge (JGE) counterclockwise.. Then, confirm that it indicates ~gf cm. Torque Gauge/Adapter (JGF/JGB). CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM Tape Running Mechanism is adjusted precisely at the factory. Adjustment is not necessary as usual. When you replace the parts of the tape running mechanism because of long term usage or failure, the confirmation and adjustment are necessary. - GUIDE ROLLER. Playback the VHS Alignment Tape (JGC or JGE). (Refer to SERVICING FIXTURE AND TOOLS). Connect CH- of the oscilloscope to TP (Envelope) and CH- to TP (SW Pulse).. Press and hold the TRACKING-AUTO button on the remote control more than seconds to set tracking to center.. Trigger with SW Pulse and observe the envelope. (Refer to Fig. --A). When observing the envelope, adjust the Adjusting Driver (JG) slightly until the envelope will be flat. Even if you press the Tracking Button, adjust so that flatness is not moved so much.. Adjust so that the A B ratio is better than as shown in Fig. --B, even if you press the Tracking Button to move the envelope (The envelope waveform will begin to decrease when you press the Tracking Button).. Adjust the PG shifter during playback. (Refer to the ELECTRICAL ADJUSTMENTS) NOTE After adjustment, confirm and adjust A/C head. (Refer to item -) Torque Gauge/Adapter (JGE/JGB) CH- Envelope (TP) CH- Track CH- Track CH- SW Pulse (TP) S Reel Envelope NOTE T Reel Ass'y Fig. - CH- Audio () () If the torque is out of the range, replace the following parts. Fig. --A Check item - - Replacement Part Idler Ass'y/Clutch Ass'y T Brake Spring/Tension Spring Max Entrance A B Exit Max A B = Fig. --B D-
MECHANICAL ADJUSTMENTS - CONFIRMATION AND ADJUSTMENT OF AUDIO/ CONTROL HEAD When the Tape Running Mechanism does not work well, adjust the following items.. Playback the VHS Alignment Tape (JGC or JGE). (Refer to SERVICING FIXTURE AND TOOLS). Confirm that the reflected picture of stamp mark is appeared on the tape prior to P Post as shown in Fig. - -A. a) When the reflected picture is distorted, turn the screw clockwise until the distortion is disappeared. b) When the reflected picture is not distorted, turn the screw counterclockwise until little distortion is appeared, then adjust the a).. Turn the screw to set the audio level to maximum.. Confirm that the bottom of the Audio/ Control Head and the bottom of the tape is shown in Fig. --C. c) When the height is not correct, turn the screw to adjust the height. Then, adjust the ~ again. Audio/Control Head - TAPE RUNNING ADJUSTMENT (X VALUE ADJUSTMENT). Confirm and adjust the height of the Reel Disk. (Refer to item -). Confirm and adjust the position of the Tension Post. (Refer to item -). Adjust the Guide Roller. (Refer to item -). Confirm and adjust the Audio/Control Head. (Refer to item -). Connect CH- of the oscilloscope to TP, CH- to TP and CH- to HOT side of Audio Out Jack.. Playback the VHS Alignment Tape (JGU or JGV). (Refer to SERVICING FIXTURE AND TOOLS). Press and hold the TRACKING-AUTO button on the remote control more than seconds to set tracking to center. 8. Set the X Value adjustment driver (JG) to the of Fig. --B. Adjust X value so that the envelope waveform output becomes maximum. Check if the relation between Audio and Envelope waveform becomes () or () of Fig. --A. Reflected picture of Stamp Mark P Post Stamp Mark Fig. --A Audio/Control Head Fig. --B Audio/Control Head Tape.±.mm Fig. --C D-
MECHANICAL ADJUSTMENTS. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 8 9. Tension Adjust. Tension Arm. Guide Roller. P Post. Audio/Control Head. X value adjustment driver hole. P Post 8. T Brake Spring 9. T Reel Ass'y. Idler Ass'y. S-S Brake Spring. S Reel D-
ELECTRICAL ADJUSTMENTS. ADJUSTMENT PROCEDURE Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION When replacing IC's or transistors, use only specified silicon grease (G). (To prevent the damage to IC's and transistors.) On-Screen Display Adjustment. Unplug the AC plug for more than minutes to set the clock to the non-setting state. (To release the Back-Up immediately, take the short circuit between C and at the Power Off.) Then, set the volume level to minimum.. Press the VOL. DOWN button on the set and the channel button (9) on the remote control for more than seconds to display adjustment mode on the screen as shown in Fig. -. NOTE. H/V. AKB. COLOR TEMP. PICTURE. OTHERS. TEST PATTERN. 8. (VOL TEST). END "The adjustment items, and 8 are not used for this model." Fig. -. BASIC ADJUSTMENTS (VCR SECTION) - PG SHIFTER. Connect CH- on the oscilloscope to TP and CH- to pin of CP.. Playback the alignment tape. (JGF). Press and hold the Tracking-Auto button on the remote control more than seconds to set tracking to center.. Press the VOL. DOWN button on the set and the channel button () on the remote control simultaneously until the indicator REC disappears. If the indicator REC disappears, adjustment is completed. (If the above adjustments doesn't work well)... Use the channel buttons (-8) on the remote control to select the options shown in Fig. -. Press the channel button () or MENU button on the remote control to end the adjustments. Press the VOL. DOWN button on the set and the channel button () on the remote control simultaneously until the indicator REC disappears. When the REC indicator is blinking, press both VOL. DOWN button on the set and the channel button () on the remote control simultaneously and adjust the Tracking +/- button until the arising to the down of Head Switching Pulse becomes. ±.H. (Refer to Fig. --A, B) Press the Tracking Auto button. - VCO.....H.H CH- CH- CH- CH- Fig. --A Fig. --B Place the set with Aging Test for more than minutes. Connect the oscillator (9.MHz) to pin of TU through Ω resistor. Connect the digital voltmeter between the pin of IC. Adjust the L8 until the digital voltmeter is.8 ±.V. - RF AGC..... Receive the UHF (8dB). Connect the digital voltmeter between the pin of CP and the pin () of CP. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "OTHERS". The Fig. - appears on the display. Press the channel button () on the remote control to select "RF AGC DELAY". Press the PLAY or STOP button on the remote control until the digital voltmeter is. ±.V.. RF AGC DELAY. VIDEO LEVEL. FM LEVEL. OSD H. CUT OFF. (CHROMA VOL). 8.. RETURN "The adjustment items, and are not used for this model." Fig. - D-
(TV SECTION) - CONSTANT VOLTAGE... Connect the digital voltmeter to TP. Set condition is AV MODE without signal. Adjust the VR until the DC voltage is ±.V. - CUT OFF...... Place the set with Aging Test for more than minutes. Set condition is AV MODE without signal. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "OTHERS". The Fig. - appears on the display. Press the channel button () on the remote control to select "CUT OFF". Adjust the Screen Volume until a dim raster is obtained. - WHITE BALANCE NOTE Adjust after performing CUT OFF adjustment........ 8. 9. Place the set with Aging Test for more than minutes. Receive the white % signal from the Pattern Generator. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "AKB". The Fig. - appears on the display. Press the channel button () on the remote control to select the "R.BIAS". Using the PLAY or STOP button on the remote control, adjust the R.BIAS. Press the CH. UP/DOWN button on the remote control to select the "G.BIAS", "B.BIAS", "R.DRIVE", "G.DRIVE" or "B.DRIVE". Using the PLAY or STOP button on the remote control, adjust the G.BIAS, B.BIAS, R.DRIVE, G.DRIVE or B.DRIVE. Perform the above adjustments and 8 until the white color is looked like a white.. AKB AUTO. R.BIAS. G.BIAS. B.BIAS. R.DRIVE. G.DRIVE. B.DRIVE 8. AGC AUTO. RETURN "The adjustment items and 8 are not used for this model." Fig. - - FOCUS... Receive a broadcast. Turn the Focus Volume fully counterclockwise once. Adjust the Focus Volume until picture is distinct. ELECTRICAL ADJUSTMENTS D- -8 HORIZONTAL PHASE. Receive the center cross signal from the Pattern Generator.. Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "H. PHASE".. Press the PLAY or STOP button on the remote control until the vertical line becomes fit to the notch of the shadow mask.. H. PHASE. H. BLK. V. SIZE /. V. POSI /. V. LIN /. V. SC /. V. COMP 8. (H FREQ). RETURN "The adjustment item 8 is not used for this model." Fig. - -9 VERTICAL SIZE NOTE Adjust after performing adjustments in section -8.. Receive the cross hatch signal from the Pattern Generator.. Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "V. SIZE /".. Press the PLAY or STOP button on the remote control until the rectangle on the center of the screen becomes square.. Receive a broadcast and check if the picture is normal.. Receive the cross hatch signal of NTSC. (Audio Video Input) 8. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~. - VERTICAL LINEARITY NOTE Adjust after performing adjustments in section -9.. Receive the cross hatch signal from the Pattern Generator.. Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "V. LIN /".. Press the PLAY or STOP button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum.. Receive the cross hatch signal of NTSC. (Audio Video Input). Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~.
ELECTRICAL ADJUSTMENTS - VERTICAL POSITION NOTE Adjust after performing adjustments in section -.. Receive the center cross signal from the Pattern Generator.. Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "V. POSI /".. Press the PLAY or STOP button on the remote control until the horizontal line becomes fit to the notch of the shadow mask.. Receive the center cross signal of NTSC. (Audio Video Input). Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~. - OSD HORIZONTAL. Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "OTHERS". The Fig. - appears on the display.. Press the channel button () on the remote control to select "OSD H".. Press the PLAY or STOP button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. -) OSD H [ TV ] A B Fig. - - SUB BRIGHTNESS. Receive more than 8 steps monochrome pattern (8dB). (RF Input). Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "PICTURE". The Fig. - appears on the display.. Press the channel button () on the remote control to select "BRIGHT".. Press the PLAY or STOP button on the remote control until the second scale from left end is starting to glitter. (Refer to Fig. -). Receive more than 8 steps monochrome pattern. (Audio Video Input). Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~.. BRIGHT. CONTRAST. COLOR. TINT. SHARPNESS. OSD CONT. 8.. RETURN "The adjustment item is not used for this model." Fig. - brilliance on the left end scale. The next scale have a slight brilliance. - SUB COLOR....... 8. 9. Fig. - Receive the color bar pattern. (RF Input) Using the remote control, set the brightness, contrast and color to normal position. Connect the synchro scope to TP8. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "PICTURE". The Fig. - appears on the display. Press the channel button () on the remote control to select "COLOR". Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white % and % is set to scales on the screen of the oscilloscope. Press the PLAY or STOP button on the remote control until the red color level is adjusted to 9% of the white level. (Refer to Fig. -8) Receive the color bar pattern. (Audio Video Input) Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~. White % % 9% Red Level White % Fig. -8 D-
ELECTRICAL ADJUSTMENTS - SUB CONTRAST. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "PICTURE". The Fig. - appears on the display.. Press the channel button () on the remote control to select "CONTRAST".. Press the PLAY or STOP button on the remote control until the contrast step. becomes "9". Press the AV button on the remote control to set to the AV mode.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "PICTURE". The Fig. - appears on the display.. Press the channel button () on the remote control to select "CONTRAST".. Press the PLAY or STOP button on the remote control until the contrast step. becomes "" - V. COMP. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "V. COMP".. Check if the step. of V. COMP is "". - SUB SHARPNESS. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "PICTURE". The Fig. - appears on the display.. Press the channel button () on the remote control to select "SHARPNESS".. Check if the step. of SHARPNESS is "8".. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~. - OSD CONTRAST. Using the remote control, set the brightness and contrast to normal position.. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "PICTURE". The Fig. - appears on the display.. Press the channel button () on the remote control to select "OSD CONT".. Check if the step. of OSD CONT. is "". -8 H. BLK. Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "H. BLK".. Switch the R/L by using the ENTER button on the remote control and check if the H. BLK step. becomes "R, L". -9 V. S-CORRECTION (V. SC). Activate the adjustment mode display of Fig. - and press the channel button () on the remote control to select "H/V". The Fig. - appears on the display.. Press the channel button () on the remote control to select "V. SC /".. Check if the step. of V. SC is "".. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments ~. D-
ELECTRICAL ADJUSTMENTS. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP C TP TP IC TU L8 CP J SYSCON PCB D-