Zenith XBV323 Series Service Manual Download

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3-13

3. Y/C CIRCUIT

(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,

Is 5V applied to IC301
Pins23, 44, 45, 52, 68, 77?

Does the Color signal
appear at IC301
Pins41, 50?

Check the line of the REG
5V Line. (Power Circuit)

Replace X301.

Check C342, C341,
R333.

Is X301 (3.58MHz)
normal?

Replace IC301.

Does the Color signal
appear at IC301 Pin48?

Replace IC301.

YES

VCR ELECTRICAL TROUBLESHOOTING GUIDE

Summary of Contents for XBV323 Series

Page 1: ...Year 2003 Summary 1 Cabinet Main Chassis 2 Electrical 3 Mechanism of VCR Part 4 Mechanism of DVD Part 5 Parts List 6 Published September 2003 by Technical Publications Zenith Electronics Corporation 2...

Page 2: ......

Page 3: ...1 1 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 2 SERVICING PRECAUTIONS 1 3 SPECIFICATIONS 1 4...

Page 4: ...solder splashes or sharp solder points Be certain to remove all loose foreign par ticles 4 Check for physical evidence of damage or deterioration to parts and compo nents for frayed leads or damaged i...

Page 5: ...Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are c...

Page 6: ...ons Head system Four head helical scan azimuth system TTimer 12 hour display type with AM PM Tape speed SP 33 35 mm sec LP 16 67 mm sec SLP 11 12 mm sec Tape width 12 7 mm Maximum recording time SP 2...

Page 7: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS 1 EXPLODED VIEWS 2 2 1 Cabinet and Main Frame Section 2 2 2 Packing Accessory Section 2 3...

Page 8: ...EXPLODED VIEWS 1 Cabinet and Main Frame Section A43 A42 A49 280 465 250 467 467 467 284 283 L D 6 0 1 300 330 276 260 A46 A46A A48 A00 A26 285 457 457 457 457 467 467 452 274 452 330 323 A 5 4 3 2 1 B...

Page 9: ...ing Accessory Section BATTERY 808 BAG 804 PACKING 803 806 INSTRUCTION ASSEMBLY CABLE COAXIAL 810 CABLE ASS Y RF 801 REMOCON 900 BOX CARTON 802 PACKING 803 811 812 PLUG ASS Y 1WAY PLUG ASS Y 2WAY OPTIO...

Page 10: ...ELECTRICAL TROUBLESHOOTING GUIDE WAVEFORMS 3 56 1 SYSTEM OPERATION FLOW 3 56 2 TEST DEBUG FLOW 3 57 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 3 63 1 SYSTEM 27MHZ CLOCK RESET FLASH R W SIGNAL...

Page 11: ...SPLAY DATA REMOCON KEY RETURN 1 KEY RETURN 2 5 3VA FD FD 27VA GND 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 PM603 VIDEO IN GND AUDIO L GND AUDIO R 5 4 3 2 1 5 4 3 2 1 PMD03 SPM SPM FM FM L...

Page 12: ...al to 6 5H 0 5H 412 s 1H 63 s Note Adjust the distance of X pressing the Tracking or Tracking when the ATR is blinking after the SP Test Tape is inserted PG Adjustment Method a 1 Playback the SP stand...

Page 13: ...ere about 2 5V at IC103 Vref Check the Main PCB 5 3VA 5 0V Line short 1 No 5 3VA SYS Hi Fi TUNER NO 12VA Check or Replace D110 Is the Vcc 13V supplied to terminal in D115 Check or Replace the Motor Vc...

Page 14: ...Check the Power Control Check or Replace Q162 R157 R158 R159 D121 YES YES YES Check or Replace Q162 Q160 4 No 5V TO DVD No 33V Check the Power Control Is Q162 Base H Check or Replace Q161 R154 R155 NO...

Page 15: ...H Is Vcc 12V supplied to IC151 Pin1 NO NO Check or Replace D114 NO Check the Power Control YES YES Check or Replace IC151 R170 C154 YES 8 No 8V TO DVD NO 3 3V Is Vcc 4V supplied to IC152 Pin1 Is the...

Page 16: ...to SMPS 5 3VA troubleshooting Check IC501 Pins22 23 24 25 Do T UP Reel Pulses appear at the point between R556 and R536 Replace the T UP Reel Sensor RS501 Check the CST SW and the peripheral circuitry...

Page 17: ...the DFG Pulses appear at PMC01 Pin11 Replace the Cap M Are the foil patterns and the Components between IC501 Pin 90 and PMC01 Pin11 shorted Replace IC501 Refer to 2 No 12VA of Power section Do the Dr...

Page 18: ...d Does the CFG signal come into IC501 Pin87 Are the foil patterns and Components between IC501 Pin77 and PMC01 Pin9 shorted 2 SERVO CIRCUIT 3 When the Capstan Motor doesn t run NO NO NO YES YES YES Wh...

Page 19: ...at IC501 Pins44 45 Replace IC501 No I2 C bus communication Does Power appear at the Pull up impedence R569 R507 Replace IC501 Refer to SMPS 5 3VA Trouble Shooting Replace the defective switches Refer...

Page 20: ...l appear at IC602 Pin7 Check the REG 5V Line Power Circuit Is I2 C BUS signal applied to IC301 Pins53 54 55 Replace IC301 Check the path of the sig nal between IC301 Pin 26 and IC501 Pins50 52 Is ther...

Page 21: ...cuit Check the System Circuit IC501 Pin18 Check the V H S W level Refer to SYSTEM Y C BUS CHECK Trouble Shooting Is the V H S W signal applied to IC301 Pin57 Does the Rectangular waveform 5V appear at...

Page 22: ...Pins23 44 45 52 68 77 Does the Color signal appear at IC301 Pins41 50 Check the line of the REG 5V Line Power Circuit Replace X301 Check C342 C341 R333 Is X301 3 58MHz normal Replace IC301 Does the Co...

Page 23: ...rightness normal Does signal appear at IC301 Pins41 50 NO Check X301 oscillation frequency YES Is the brightness signal sup plied to IC301 Pins18 Is 5V supplied to IC301 Pins23 44 45 68 77 Check the p...

Page 24: ...4 YES Check the IIC Clock and DATA at IC801 Pins37 38 YES Check Audio of IC801 Pins78 80 YES Check Audio of C804 C854 YES Check JK601 Check the TU701 SIF Pin13 NO Check the DVD MODULE PMD02 Pins9 11 N...

Page 25: ...velope at IC801 Pin23 over 3Vp p YES Check IC801 Pin37 Data Pin38 Clock YES Do Audio Signals appear at IC801 Pin80 L CH 78 R CH YES Do Audio Signals appear at JK601 Check Power NO Check IC501 Pin19 A...

Page 26: ...als appear at IC301 Pin76 Normal Audio YES Do OSC signals appear at P3D02 pins4 5 50Vp p YES YES Check Power NO Check ports of CPM IC501 Pins71 72 Check Audio input signal of IC801 Pin57 TU A 7 69 DVD...

Page 27: ...Check the signal flow from IC602 Pin7 to JK601 Pin Video out YES Check 33V line NO Check 5V line NO YES Does the Clock signal appear at TU701 Pin9 Check the l2 C Clock Signal of COM Pin71 NO YES Does...

Page 28: ...at IC801 Pin57 YES Check the Audio of IC801 Pins78 80 YES Check the Signal flow from IC801 Pins78 80 to JK601 Audio out L R YES Check the Tuner SIF of TU701 Pin13 NO 1 Check the Vcc 5 3VA 9V of IC801...

Page 29: ...101 SNUBBER BLOCK D101 R104 C105 C106 RECTIFIER SMOOTHING D110 C123 L122 C126 C163 RECTIFIER SMOOTHING D108 C130 R118 RECTIFIER SMOOTHING D111 C127 L123 C128 RECTIFIER SMOOTHING D112 L124 C129 C131 FE...

Page 30: ...NC ENABLE CLOCK DATA AFT A OUT SIF TU 30V NC V OUT 999 GND 83 PWR CTL H 81 HSR H 110 FD 109 FD 108 27VA 100 AFT 732 TU V OUT 103 DRUM VCC 102 REG 12V 104 CAP VCC 107 REG 5V 786 REG 9V 875 MOD A IN 61...

Page 31: ...N DE EM PB FM EQ FM AGC CNC YNR COMB 4 21M BPF SUB CONV 39 37 36 34 26 22 21 P B PB Mode EP REC SP REC 57 V H SW 55 Y C ENA 54 Y C DATA 53 51 50 49 48 47 39 38 37 36 34 32 30 28 22 21 20 73 70 69 66 Y...

Page 32: ...2 71 80 78 A OUT R System IC801 LA72670M IC301 LA71206M AMP EQ AMP 78 4 10 A OUT R MOD OUT DATA CLOCK R P HEAD N A IN 53 ENA 55 54 5 4 6 From u COM 80 A OUT L 2 OUTPUT SELECTOR EQ 3 2 IC301 LA71206M...

Page 33: ...Tu 24 Hi Fi PB B Hi Fi PB A Hi Fi REC 57 12 74 11 73 9 71 6 4 26 27 80 A OUT L A OUT R 78 3 AUDIO INPUT BLOCK NORMAL AUDIO OUT To AVCP NORMAL AUDIO IN From AVCP SIF DVD A IN L DVD A IN R AV1 A IN L AV...

Page 34: ...40 37 98 34 IC501 M37760 MODE S1 I Limit MODE S2 MODE S3 MODE S4 T UP Sensor T UP Reel SUP Reel CST IN Vss AMP Vss OSD Vss SYSCON Vcc SYSCON Vcc SERVO CAP PWM CTL CTL CFG CAP REV H LD CTL V ENV V H S...

Page 35: ...AFETY NOTICE WHEN SERVICING THIS CHASSIS UNDER NO CIR CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ZENITH ELECTRONICS CORPORATION ALL COMPONENTS SHOULD BE R...

Page 36: ...PB REC 3 34 3 35 2 TU IF CIRCUIT DIAGRAM...

Page 37: ...to Tracking has failed IC301 Pin 57 is defective PB COLOR Signal does not appear IC301 Pins 53 54 55 are defective IC301 doesn t operate IC301 is defective PB COLOR Signal does not appear IC306 Q307 a...

Page 38: ...PB REC 100 100 T W KTC3875 02 12 04 R13734C 3 38 3 39 4 Hi Fi CIRCUIT DIAGRAM No Hi Fi Audio 23 Pin is defective No Audio IC801 Pins37 38 aredefective...

Page 39: ...ONLY COMPONENT OPTION ONLY SVHS OPTION 3 40 3 41 5 JACK CIRCUIT DIAGRAM...

Page 40: ...3 43 6 SYSTEM CIRCUIT DIAGRAM Q501 Q503 are defective COM is unstable IC505 is defective VCR will not operate X501 is defective CLOCK SETTING will not operate X502 is defective COM will not operate IC...

Page 41: ...3 44 3 45 7 TIMER CIRCUIT DIAGRAM...

Page 42: ...DIV EP REC REC RF IC501 Waveform Tek Stop 10 0KS s 280 Acqs M5 00ms Ch1 Ch1 3 04 V 1 00 V T T 1 Tek Stop 250KS s 299 Acqs M 200 s Ch1 Ch1 3 04 V 1 00 V T T 1 Tek Stop 10 0KS s 18 Acqs M 5 00ms Ch1 Ch1...

Page 43: ...21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 5 19 1 91 0 0 29 0 0 0 2 5 1 91 2 49 5 06 2 51 0 0 2 51 2 52 2 52 2 51 0 19 2 25 0...

Page 44: ...LOCATION GUIDE 3 50 3 51 PRINTED CIRCUIT DIAGRAMS 1 VCR P C BOARD...

Page 45: ...3 52 3 53 2 KEY 1 LEFT P C BOARD LOCATION GUIDE 3 KEY 2 RIGHT P C BOARD LOCATION GUIDE...

Page 46: ...3 54 3 55 4 POWER P C BOARD LOCATION GUIDE NOTES Warning NOTES Parts that are shaded are critical NOTES With respect to risk of fire or NOTES electricial shock...

Page 47: ...Position Recieve OPEN CLOSE Key Receive CLOSE Key 1 Stop Playback Open Tray 2 Display tray open message LOGO 1 Execute Pressed Key IR Key 2 Systemoperati on Routi ne Loop 1 Judge whether have disc and...

Page 48: ...rcuit 3 Check FLASH R Wenable signal PRD RWR 4 Check RS232 SIGNALS 5 Check FLASH Memory related circui t Check the AC Vol tage Power PCBA 110V or 220V Switch on the Power PCBA Is the DC Voltage output...

Page 49: ...n MT1376 MT1379 Check the Tray control amplifying circuit on Motor driver IC202 Does Tray move inside when it is not at closed position Normal TROUT TRIN signals Normal TRCLOSE TROPEN signal Normal LO...

Page 50: ...cal Lens has movements for searching Focus Proper F F outputs Check cable connect of the pick up head Proper FOSO outputs to motor driver Check FOSO connection on MT1379 and motor driver Check the amp...

Page 51: ...elated circuit on MT1336 RFL signal Collector voltage of power transistor is OK Q204 Q205 Check cable connection between transistor output and pick up head Proper RFL signal on MT1336 Proper DMSO sign...

Page 52: ...EO signal on MT1336 Proper FEO signal on MT1336 Check the related circuit on MT1336 FEO sugnal Check the related circuit on MT1336 Properly TRSO signal on MT1379 T T output properly Check the TRSO con...

Page 53: ...D Audio DAC received correct data stream Normal Audio DAC out IC401 Check Audio filter amplify mute circuit IC402 Application circuit Check connection between MT1379 Audio DAC Check VRST ACLK ABCK ASD...

Page 54: ...DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 MT1379 main clock is at 27MHz X501 3 8V 27MHz FIG 1 1 2 MT1379 MT1336 reset is high active PWR_CTL CN505 PIN 7 5 2VA Power Cord in M_RESET CN50...

Page 55: ...3 64 3 RS232 waveform during procedure Downloading TXD J6 PIN3 RXD J6 PIN 2 FIG 1 3 4 Flash R W enable signal during download Downloading FRD IC5A1 PIN 28 FWR IC5A1 PIN 11 FIG 1 4...

Page 56: ...1379 main clock is at 27MHz X501 IC502 IC503 PIN 35 DCLK 93MHz Vp p 2 2 Vmax 2 7V FIG 2 1 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 PIN 1 TRCL...

Page 57: ...Tray close waveform OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 PIN 1 TRCLOSE IC202 PIN 2 FIG 3 2 3 Tray open waveform OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 PIN 1 TRCLOSE IC202 PIN 2 FI...

Page 58: ...1 4V 1 0V IC501 PIN 19 STBY 5V IC201 PIN 50 SL 4 7V 3 6V 1 9V IC202 PIN 12 SL 5 3V 3 7V 2 5V IC202 PIN 13 FIG 4 1 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION FOSO 1 5V 1 4V 1 3V IC501 PIN 12 F 4...

Page 59: ...TROL RELATED SIGNAL NO DISC CONDITION MDI1 0V 180mV IC201 PIN 124 LD01 5 0V 3 5V IC201 PIN 125 LD02 5 0V 3 6V IC201 PIN 126 FIG 6 1 7 DISC TYPE JUDGEMENT WAVEFORMS F IC202 PIN 9 FE IC201 PIN 18 RFL IC...

Page 60: ...3 69 F IC202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 FIG 7 2 DVD F IC202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 FIG 7 3 CD...

Page 61: ...3 70 F IC202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 FIG 7 4 CD 8 FOCUS ON WAVEFORMS FE IC201 PIN 18 FOSO IC501 PIN12 F IC202 PIN 9 F IC202 PIN 8 FIG 8 1 DVD...

Page 62: ...FE IC201 PIN 18 FOSO IC501 PIN12 F IC202 PIN 9 F IC202 PIN 8 FIG 8 2 CD 9 SPINDLE CONTROL WAVEFORMS NO DISC CONDITION DMSO 1 4V 1 8V IC501 PIN 18 SP 3 6V 2 4V IC202 PIN 10 SP 3 6V 4 8V IC202 PIN 11 FI...

Page 63: ...72 10 TRACKING CONTROL RELATED SIGNAL System checking TE IC201 PIN 21 TRSO IC501 PIN 13 T IC202 PIN 7 T IC202 PIN 6 FIG 10 1 DVD TE IC201 PIN 21 TRSO IC501 PIN 13 T IC202 PIN 7 T IC202 PIN 6 FIG 10 2...

Page 64: ...3 73 11 RF WAVEFORM RFOP 2 3V 1 1V IC201 PIN 6 RFON 0 8V 2 0V IC201 PIN 7 FIG 11 1 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF IC501 PIN 153 FIG 12 1...

Page 65: ...3 74 13 MT1379 VIDEO OUTPUT WAVEFORMS 1 Full colorbar signal CVBS IC604 PIN 23 FIG 13 1 2 Y IC604 PIN 21 FIG 13 2...

Page 66: ...3 75 3 C IC604 PIN 26 FIG 13 3 14 AUDIO OUTPUT FROM AUDIO DAC 1 Audio L R FIG 14 1 JK601 PIN 4 5...

Page 67: ...3 76 2 Audio related Signal ASDAT3 IC501 PIN 157 ABCK IC501 PIN 148 ALRCK IC501 PIN 149 ASDATA3 FIG 14 2...

Page 68: ...F SLED FEEDING MOTOR SL SL IC202 LA6560 MOTOR DRIVER M V33 DV33 AV33 DV33 V25 VCC DV33 3V3M ACLK ABCLK ALRCK IC604 MM1623XFBE VIDEO BUFFER MIC_DETC ASPDIF COAX OPTICAL ASPECT VCC RVCC AVCC AV33 V25 LD...

Page 69: ...P8 ADIN F F T T SL SL LOAD LOAD 27MHz X TAL RFOP RFON LD0 1 LDO 2 IOA MDI 1 ALPC V20 SDEN SDATA SCLK PWMOUT2 LIMIT TRIN TROUT TRCLOSE STBY V1P4 IC302 GM72V161621 1M x 16bit SDRAM IC303 GM72V161621 1M...

Page 70: ...face FRONT BOARD IC502 SDRAM 16M RFOP RFON HTRC RFRP RFL DCLK WE CAS RAS CS DCKE MA 0 10 DQM0 DQM1 DQ 0 15 DQM2 DQM3 DQ 16 31 X501 27MHz SCL SDA Y2 Y Y3 Color Y4 Y Y5 Cb Y6 Cr ASPECT 16 9 FEO CSO TEO...

Page 71: ...AUDIO Block Diagram IC5C1 VIDEO 6dB Amp IC401 AUDIO DAC 2CH IC402 OP Amp LPF Buffer CVBS COMPONENT R G B Y Pb Pr SUPER VIDEO Y C R G B Y Pb Pr Y C DAC RESET ACLK SCL SDA INTERFACE MPEG MPEG AUDIO R AU...

Page 72: ......

Page 73: ...working or screen is abnormal No Power on No Video signal Video signal Y Video signal Color Digitron will not display System not working Program download fail 3 81 3 82 CIRCUIT DIAGRAMS 1 SYSTEM CIRCU...

Page 74: ...No CD DVD LD 3 83 3 84 2 RF DSP SERVO CIRCUIT DIAGRAM...

Page 75: ...3 85 3 86 3 AUDIO CIRCUIT DIAGRAM...

Page 76: ...3 87 3 88 4 AV JACK CIRCUIT DIAGRAM...

Page 77: ...08 0 78 1 06 80 0 23 0 08 0 89 1 15 STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY 0 08 0 16 3 28 3 29 5 52 5 49 5 09 5 08 1 82 0 45 3 28 3 28 5 52 5 48 2 43 2 42 2 8...

Page 78: ...3 198 0 0 199 0 0 200 0 2 15 201 0 1 44 202 0 1 44 203 0 1 43 204 0 1 43 205 0 1 42 206 0 2 1 207 0 2 07 208 0 1 41 209 0 1 52 210 0 1 43 211 0 2 81 212 0 3 28 213 0 0 12 214 0 0 12 215 1 02 1 43 216...

Page 79: ...LOCATION GUIDE 3 93 3 94 PRINTED CIRCUIT DIAGRAMS 1 MTR P C BOARD...

Page 80: ......

Page 81: ...Service 4 12 1 Mechanism Alignment Position Check 4 13 2 Preparation for Adjustment 4 14 3 Checking Torque 4 14 4 Guide Roller Height Adjustment 4 15 4 1 Preliminary Adjustment 4 15 4 2 Precise Adjus...

Page 82: ...embly Chassis Embossing A 5 T 17 Lid Opener Chassis Embossing A 5 T 17 18 Pinch Arm Assembly Shaft A 5 T 17 19 T up Arm T up Lever 1 Hook A 5 T 17 18 20 Capstan Belt Capstan Motor 3 Screw A 6 B 21 F R...

Page 83: ...nd sep arate the Drum assembly 3 Unhook H1 H2 and separate the FPC Holder and FPC Cap See Fig B 1 1 1 Drum Motor 1 Remove two Screws S2 and disassemble the Stator of the Drum Motor 2 Remove two Screws...

Page 84: ...Plate F L Arm Assembly S W Spring Lever F L Gear Rack Assembly Chassis Door Opener L D Motor Bracket Assembly CST Holder Assembly B C D E H6 A B S W Lever Assembly H8 Fig A 2 Fig A 2 1 Fig A 2 2 Fig A...

Page 85: ...A 2 3 5 L D Motor Bracket Assembly Fig A 2 4 1 Unplug the Connector C1 2 Unhook three Hooks H3 H4 H5 on thr bottom side of the Chassis lift up the L M Bracket Assembly and disas emble the L D Motor Br...

Page 86: ...rom the chassis 10 F E Head Fig A 3 2 1 Carefully pry tab A see Fig A 3 2 to clear the embossed tab on the chassis Turn the Cleaner Arm Assembly counter clockwise and lift it from the chassis 11 A C H...

Page 87: ...sembly Fig A 4 2 1 Unhook the RS Spring from the Hook H10 of the Chassis 2 Lift the T Brake Assembly up 14 Tension Arm Assembly Fig A 4 3 1 Unhook the Tension Spring from the Hook H11 of the Tension A...

Page 88: ...ly pry the B portion of the Lid Opener from the Embossing of the Chassis 2 Turn the Lid Opener to clockwise direction and lift it up 18 Pinch Arm Assembly Fig A 5 3 1 Lift the Pinch Arm Assembly up 19...

Page 89: ...move the three Screws S5 from the bottom of the Chassis and lift the Capstan Motor up 21 F R Lever Fig A 6 3 1 Unlock the Locking Tab L1 as Fig A 6 3 and lift the F R Lever up 22 D35 Clutch assembly F...

Page 90: ...A and the Cam Gear Hole B in a straight line after the Drive Gear Hole C is aligned with the Chassis Hole 25 Sector Gear Fig A 7 3 1 Unhook the Hook H15 of the Loading Base on bottom Chassis and lift...

Page 91: ...of the P2 and P3 Gear Assembly in a straight line after confirming the Sector Gear Hole A and the Slider Plate Hole B are aligned as in the above Fig 30 P2 Base Assembly Fig A 8 3 P3 Base Assembly Fi...

Page 92: ...up 32 Tension Base Fig A 9 2 1 Remove the A portion of the Tension Base from the Embossing of the Chassis 2 Turn the Tension Base counterclockwise and lift it up 33 Idler Arm Jog Assembly Fig A 9 3 1...

Page 93: ...00 D006 4 Torque gauge adaptor Part No D09 R001 5 Post height adjusting driver Part No DTL 0005 6 Type driver 5 2 Alignment tape Part No NTSC DTN 001 PAL DTN 0002 3 Torque gauge 3 600g Cm ATG 3 Part N...

Page 94: ...w in Fig C 2 4 Remove the Screw which attaches the Deck Mechanism and Main Frame confirm the Cam Gear is aligned with the Drive Gear as shown below in Fig C 1 A 5 Confirm if the Mode S W on the Main P...

Page 95: ...e Torque Gauge affixed The Torque reading to measure occurs when the Tape abruptly changes direction from Fast Forward of Rewind Mode when quick bracking is applied to both Reels SRK VIDEO CASSETTE TO...

Page 96: ...2 NTSC SW 30Hz PAL SW 25Hz Head Switching Output Point RF Envelope Output Point Test Conditions VCR VCP State Play an Alignment Tape Adjustment Point Guide Roller Height Adjustment Screws Fig C 4 2 Fi...

Page 97: ...xed Screw Fig C 5 3 A C Head Tape Tape 0 2 0 25mm P4 5 1 Preliminary Adjustment Height and Tilt Adjustment Perform the Preliminary Adjustment when there is no Audio Output Signal with the Alignment Ta...

Page 98: ...ely adjust the Azimuth Adjustment Screw A and the Tilt Adjustment Screw C for Maximum Output of the 1Khz and 7Khz segments while maintaining the flattest Envelope differential between the two Frequenc...

Page 99: ...chanism Condition Play the blank tape Play an alignment tape Adjustment Points Guide Roller Precise Adjustment Switching Point Tracking Preset X Value Checking Adjustment Procedure Play a blank tape a...

Page 100: ...pinch roller If locations marked with o do not operate normally after cleaning check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Gr...

Page 101: ...cohol Touch the cleaning patch to the head tip and gently turn the head rotating cylinder right and left Do not move the cleaning patch vertically Make sure that only the buckskin on the cleaning patc...

Page 102: ...4 1 Loading Path Inside Top side 2 Tension Base Boss inside Hole 3 F L Arm Assembly U Groove 4 Take up Arm Rubbing Section 5 L D Motor Gear Wheel Part 6 Shaft 7 F L Arm Assembly of Buming Inside Hole...

Page 103: ...4 22 GEAR F R GEAR AY P2 P3 F R Lever Tension Base Boss CAM...

Page 104: ...ES YES NO NO NO 1 Deck Mechanism A Auto REW doesn t work NO NO NO Is the present mode F R Mode Is the mode SW assembled correctly refer to Pages 4 14 Is the normal voltage supplied to the Capstan Moto...

Page 105: ...pring Replace Drum Motor Check Servo Syscon Check the Syscon COM Insert the cassette Check CST Holder Assembly Is there variation for CST IN S W Output In Tape with REC Tab L H L In Tape without REC T...

Page 106: ...Circuit Check Servo Syscon Does the Capstan Motor turn Is the terminal voltage of the Drum Motor more than 2 3V Replace the Drum Motor Is the Vcc voltage of the Drum Motor normal Check the clutch and...

Page 107: ...hort circuit between cassette switch and GND on main P C Board Remove the short circuit part or Replace the main P C Board NO Check Mode switch location and syscon circuit Replace CST IN Switch YES NO...

Page 108: ...power of L D Motor Is the Cassette Holder Assembly assembled correctly Replace the F L Rear Rack Does the F L Gear Rack work Does the Door Opener work Does the F L Arm Assembly work Does the L D Moto...

Page 109: ...4 28 EXPLODED VIEWS 117 103 105 117 100 106 107 A21 114 113 112 110 115 A24 116 102 A23 032 A22 109 054 054A 100A 100B 1 Front Loading Mechanism Section...

Page 110: ...9 401 402 001 008 011 031 079 017 032 024 406 020 021 028 019 018 029 030 026 A03 A04 A01 002 002A 025 027 022 003 004 006 007 010 405 014 015 009 409 013 023 016 405 012 402 OPTIONAL PART 2 Moving Me...

Page 111: ...EXPLODED VIEWS 4 30 051 052 517 061 056 058 518 052A 055 060 410 070 069 076 032 077 068 064 066 065 067 A11 078 A12 OPTIONAL PART 3 Moving Mechanism Section 2...

Page 112: ...MEMO...

Page 113: ...2 1 1 3 Clamp Upper 5 2 2 Tray Disc 5 2 3 Base Assembly Sled 5 3 3 1 Gear Assembly Feed 5 3 3 2 Gear Assembly Middle 5 3 3 3 Gear Assembly Rack 5 3 4 Rubber Rear 5 3 5 Frame Assembly Up Down 5 4 6 Be...

Page 114: ...Rear Frame Assembly Up Down Belt Loading Gear Pulley Gear Loading Guide Up Down PWB Assembly Loading Base Main 2 Screws 2 Locking Tabs 4 Screws 1 Screw 1 Screw 1 Locking Tab 1 Locking Tab 1 Locking T...

Page 115: ...amp Assembly Disc from the Holder Clamp 1 1 1 Plate Clamp 1 Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp 1 1 2 Magnet Clamp 1 1 3 Clamp Upper 2 Tray Disc Fig 5 2...

Page 116: ...ISM DISASSEMBLY 3 Base Assembly Sled Fig 5 3 1 Release 4 Screw S2 2 Disconnect the FFC Connector C1 3 1 Gear Assembly Feed 3 2 Gear Middle 3 3 Gear Assembly Rack 1 Release the Scerw S3 4 Rubber Rear F...

Page 117: ...ck the Locking Tab L4 in direction of arrow B and then separate the Gear Pulley from the Base Main 8 Gear Loading Fig 5 4 9 Guide Up Down Fig 5 4 1 Move the Guide Up Down in direction of arrow A as Fi...

Page 118: ......

Page 119: ...Exploded View 429 429 026 010 018 013 014 017 015 015A 011 430 431 011A 012 004 001 002 003 A01 A02 020 430 430 430 430 012 021 433 433 012 012 028 022 432 024 A03 A26 025 030 015B 015C 435 029 031 43...

Page 120: ......

Page 121: ...681M AA1UZA NO BRAND PANEL ASSEMBLY FRONT A43 3721R F365H PANEL ASSEMBLY FRONT VCR VC641MK AA1UZZ ZENITH B K 280 3720R F731G PANEL VIDEO VCR VC641MK HA1UZZ MOLD B K T3 NSP 283 3580R V074Q DOOR CASE VC...

Page 122: ...Y5V F C314 0CH1103K516 CHIP CAPA CERAMIC M L H D F S 0 01U 50V K B 2 0X1 25 R TP C315 0CE1064F638 CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C316 0CH1272K516 CHIP CAPA CERAMIC M L H D F S 2700P 50...

Page 123: ...CHIP CERAMIC M L HD 1UF 16V Z Y5V F 2012 R TP C535 0CH1105F946 CAPACITOR CHIP CERAMIC M L HD 1UF 16V Z Y5V F 2012 R TP C542 0CH4681K416 CAPA CHIP CERAMIC M L T C F S 680PF 50V J NP0 2012 R TP C543 0C...

Page 124: ...2 R TP C708 0CH1104K946 CAPACITOR FIXED CERAMIC TEMP C 0 1UF 2012 50V 80 20 Y5V F C731 0CE1064F638 CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C751 0CE4754K638 CAPACITOR FIXED ELECTROLYTIC 4 7UF SR...

Page 125: ...85 0CH1104K946 CAPACITOR FIXED CERAMIC TEMP C 0 1UF 2012 50V 80 20 Y5V F C886 0CE4754K638 CAPACITOR FIXED ELECTROLYTIC 4 7UF SRA SS 50V 20 FM5 TP 5 C887 0CE3354K638 CAPACITOR FIXED ELECTROLYTIC 3 3UF...

Page 126: ...2012 5 00 D R305 0RH5600D622 RESISTOR METAL GLAZED CHIP 560 OHM 1 10 W 2012 5 00 D R306 0RH0472D622 RESISTOR METAL GLAZED CHIP 47 OHM 1 10 W 2012 5 00 D R307 0RH1001D622 RESISTOR METAL GLAZED CHIP 1K...

Page 127: ...RESISTOR METAL GLAZED CHIP 5 6K OHM 1 10 W 2012 5 00 D R524 0RH0000D622 RESISTOR METAL GLAZED CHIP 0 OHM 1 10 W 2012 5 00 D R525 0RH1002D622 RESISTOR METAL GLAZED CHIP 10K OHM 1 10 W 2012 5 00 D R526...

Page 128: ...R599 0RH1001D622 RESISTOR METAL GLAZED CHIP 1K OHM 1 10 W 2012 5 00 D R5C6 0RH1001D622 RESISTOR METAL GLAZED CHIP 1K OHM 1 10 W 2012 5 00 D R602 0RH0000D622 RESISTOR METAL GLAZED CHIP 0 OHM 1 10 W 201...

Page 129: ...REEL SENSO RS501 6500RAB007A SENSOR GP1S566V SHARP REEL SENSOR OF RS502 6500RAB003A SENSOR SG 260 KODENSHI D33 REEL SENSO RS502 6500RAB007A SENSOR GP1S566V SHARP REEL SENSOR OF TU701 6700NFNL04A TUNER...

Page 130: ...FILM 27K OHM 1 6 W 5 TA26 R623 0RD6800F608 RESISTOR FIXED CARBON FILM 680 OHM 1 6 W 5 TA26 R624 0RD8200F608 RESISTOR FIXED CARBON FILM 820 OHM 1 6 W 5 TA26 R641 0RD0752F608 RESISTOR FIXED CARBON FILM...

Page 131: ...MANAGEMENT KIA78R08PI CU KEC 4P TO 220IS IC151 0IPMGFA016A IC POWER MANAGEMENT KA78R08TSTU FAIRCHILD 4P TO 22 IC152 0IPMGFA046A IC POWER MANAGEMENT KA278R33TSTU FAIRCHILD 4PIN TO IC152 0IPMGKE022B IC...

Page 132: ...023A ARM ASSY F L A24 4510R 0046A LEVER ASSY SWITCH 001 6723R 0306A DRUM CIRC ASSEMBLY SUB D35 6CH 8C6W NSP 002 4680R B008A MOTOR MECH DRUM VH4302 800 SANYO FOR D35K 002 4680R B010A MOTOR MECH DRUM MD...

Page 133: ...Y P3 NSP 066 4970R 0122A SPRING COIL D35 NSP 067 4470R 0095A GEAR P3 NSP 068 4470R 0094A GEAR P2 NSP 069 4970R 0122A SPRING COIL D35 NSP 070 4261R 0020A ARM ASSY P2 NSP 076 4510R 0047A LEVER SPRING 07...

Page 134: ...IC M L HD 1UF 10V Z Y5V F 1508 R TP C258 0CH1105D942 CAPACITOR CHIP CERAMIC M L HD 1UF 10V Z Y5V F 1508 R TP C259 0CH1105D942 CAPACITOR CHIP CERAMIC M L HD 1UF 10V Z Y5V F 1508 R TP C260 0CH1105D942 C...

Page 135: ...502 0CH1103K562 CAPACITOR FIXED CERAMIC Temp c 0 01UF 50V 10 X7R X 1608 R T C503 0CH1103K562 CAPACITOR FIXED CERAMIC Temp c 0 01UF 50V 10 X7R X 1608 R T C504 0CH1103K562 CAPACITOR FIXED CERAMIC Temp c...

Page 136: ...C577 0CH1104K942 CAPACITOR CHIP CERAMIC M L HD 0 1UF 50V Z Y5V F 1508 R TP C578 0CH1104K942 CAPACITOR CHIP CERAMIC M L HD 0 1UF 50V Z Y5V F 1508 R TP C579 0CH1104K942 CAPACITOR CHIP CERAMIC M L HD 0...

Page 137: ...1M2012 102JT CERATECH TP L262 6200HJC102A FILTER CIRC EMC HB 1M2012 102JT CERATECH TP L264 6200HJC102A FILTER CIRC EMC HB 1M2012 102JT CERATECH TP L265 6200HJC102A FILTER CIRC EMC HB 1M2012 102JT CERA...

Page 138: ...C622 RESISTOR METAL GLAZED CHIP 27K OHM 1 16 W 1608 5 00 D R243 0RH1002C622 RESISTOR METAL GLAZED CHIP 10K OHM 1 16 W 1608 5 00 D R244 0RH1502C622 RESISTOR METAL GLAZED CHIP 15K OHM 1 16 W 1608 5 00 D...

Page 139: ...2C622 RESISTOR METAL GLAZED CHIP 33 OHM 1 16 W 1608 5 00 D R521 0RH0332C622 RESISTOR METAL GLAZED CHIP 33 OHM 1 16 W 1608 5 00 D R522 0RH0332C622 RESISTOR METAL GLAZED CHIP 33 OHM 1 16 W 1608 5 00 D R...

Page 140: ...D R602 0RH0752C622 RESISTOR METAL GLAZED CHIP 75 OHM 1 16 W 1608 5 00 D R603 0RH0752C622 RESISTOR METAL GLAZED CHIP 75 OHM 1 16 W 1608 5 00 D R604 0RH0752C622 RESISTOR METAL GLAZED CHIP 75 OHM 1 16 W...

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