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Zenith ZDX-313, Service Manual

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Zenith ZDX-313 Service Manual Download Page 24

3-13

3. Y/C CIRCUIT

(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,

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

Is the Y/C Bus siganl
applied to IC301
Pins53, 54, 55?

Does the normal RF signal
appear at IC301 Pin 14?

Check the line of the SW
5V Line.

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
 IC301 Pin57(V.H.S/W)

Clean the Drum.

Check C324.

Check R328, C322,
C323.

Does the Y(Luminance) 
signal appear at IC301
Pin20?

Is the Y(Luminance) Video
waveform show

n

 at 

IC301 Pin22?

Replace IC301.

NO

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

Summary of Contents for ZDX-313

Page 1: ...ARY CABINET MAIN CHASSIS ELECTRICAL MECHANISM OF VCR PART MECHANISM OF DVD PART REPLACEMENT PARTS LIST 1 2 3 4 5 6 Published March 2005 by Technical Publications Zenith Electronics Corporation 201 Jam...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM OF VCR PART SECTION 5 MECHANISM OF DVD PART SECTION 6 REPLACEMENT PARTS LIST...

Page 3: ...UCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SERVICE INFORMATION FOR...

Page 4: ...RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC OPERA TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC TURE TUBE OR HIGH VOLTAG...

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

Page 6: ...hanges Press pause key once Change will be applied when power OFF ON OPTION NTSC model doesn t have VCR option and use DVD option B F as VCR option only DVD exist PAL model has another separate VCR op...

Page 7: ...audio 2 0 Vrms 1 KHz 0 dB 600 ohms RCA jack L R x 1 RF OUT Channel 3 or 4 Adjustable VCR SPECIFICATIONS Head system Four head helical scan azimuth system Timer 12 hour display type with AM PM Tape spe...

Page 8: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 2 1 Cabinet and Main Frame Section 2 2 2 Packing Accessory Section 2 3...

Page 9: ...DED VIEWS 1 Cabinet and Main Frame Section A00 A26 A50 A44 260 A47 A46 274 463 261 261 452 261 261 330 265 465 469 300 323 250 463 463 463 469 324 288 471 463 470 457 A43 285 286 283 284 280 A 5 4 3 2...

Page 10: ...Accessory Section BATTERY 808 BAG 804 PACKING CASING 803 806 INSTRUCTION ASSEMBLY RF CABLE 810 CABLE ASS Y RF 801 REMOTE CONTROLLER ASSEMBLY 900 BOX 802 PACKING CASING 803 811 812 PLUG ASS Y 1WAY PLU...

Page 11: ...C BOARD BOTTOM SIDE 3 57 3 POWER P C BOARD 3 59 4 KEY P C BOARD 3 59 DVD PART ELECTRICAL TROUBLESHOOTING GUIDE 3 61 1 SYSTEM OPERATION FLOW 3 61 2 SYSTEM TEST FLOW 3 62 DETAILS AND WAVEFORMS ON SYSTE...

Page 12: ......

Page 13: ...M5V 5VT 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13 PMD01 PMD02 Vcc HF RF DVD_LD DVD_PD VOL DVD GND VC_INPUT Vcc HF F E A D C B F T T F Vcc GND CD_LD CD_PD VOL CD 1 2 3 4 5 6 7 8 9 10...

Page 14: ......

Page 15: ...nd then check the distance time difference which is from the selected A B Head point of the H SW TP signal to the starting point of the vertical synchronized signal to 6 5H 0 5H 412 s 1H 63 s PG Adjus...

Page 16: ...ower SMPS CIRCUIT No 5 3VA Replace FR101 Use the same ICW Is FR101 Normal Is R101 Normal Is BD101 Normal NO NO NO NO NO NO NO NO NO Replace BD101 Replace R101 Is D102 normal Replace D125 Replace IC103...

Page 17: ...5 Is the Q162 Base H NO NO Check the PWR CTL H signal from com YES YES YES 2 No 5 0V_D No 5 0V_T Check or Replace D125 Check the PWR CTL H signal from com Is the Vcc 5 3V sup plied to Q163 Emittor Is...

Page 18: ...7 No REG 12V Check or Replace D124 NO NO Check the PWR CTL H signal from com NO Check the 33V Line No REG 9V Is the Vcc 12V supplied to Q164 Collector Check or Replace D124 Is the Vcc 10V sup plied to...

Page 19: ...o R531 Refer 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 periphe...

Page 20: ...e Drum Motor 2 doesn t run Do the DFG Pulses appear at PMC01 Pin11 Replace the DRUM M or CAP M Are the foil patterns and the Components between IC501 Pin 90 and PMC01 Pin11 shorted Replace IC501 Refer...

Page 21: ...and PMC01 Pin9 shorted 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 N...

Page 22: ...cillation occur at IC501 Pins44 45 Replace IC501 The I2 C waves don t come out Does Power appear at the Pull up impedence R569 R507 Replace IC501 Refer to SMPS 5 3VA Trouble Shooting Replace the defec...

Page 23: ...Does the Video signal appear at the Q924 Emitter Check the SW 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 the IC301 Pin 2...

Page 24: ...of the SW 5V Line 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...

Page 25: ...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 the oscillation frequency of X301 3 58M...

Page 26: ...A A YES YES Is brightness normal Does signal appear at IC301 Pins41 50 NO Check X301 oscillation frequency YES Is the brightness signal sup plied to IC301 Pins18 Is SW 5V supplied to IC301 Pins23 44 4...

Page 27: ...IC801 Pins3 5 15 32 36 46 54 YES Check the IIC Clock and DATA at IC801 Pins37 38 YES Check the Audio of IC801 Pins78 80 YES Check the Audio of C804 C854 YES Check JK901 Check the TU701 SIF Pin13 NO Ch...

Page 28: ...pe quality Is the RF Envelope 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 JK901 Check Power...

Page 29: ...appear at IC801 Pin6 YES Do Audio signals appear at IC301 Pin76 Normal Audio YES Do OSC signals appear at P3D02 pin5 50Vp p YES YES Check Power NO Check ports of CPM IC501 Pins71 72 Check Audio input...

Page 30: ...in 52 NO Does the Video signal appear at JK901 YES NO Check the signal flow from IC501 Pin52 to JK901 Pin Video out YES Check 33V line NO Check 5V line NO YES Does the Clock signal appear at TU701 Pin...

Page 31: ...the Tuner SiF signal at IC801 Pin57 YES Check the Audio of IC801 Pins78 80 YES Check the Signal flow from IC801 Pins78 80 to JK901 Audio out L R YES Check the Tuner SIF of TU701 Pin13 NO 1 Check the V...

Page 32: ......

Page 33: ...OTING BLOCK D124 C124 C134 R133 L124 C126 RECTIFIER SMOOTING BLOCK D123 C127 C137 L127 RECTIFIER SMOOTING BLOCK D121 C126 R136 RECTIFIER SMOOTING BLOCK D122 D125 C128 L128 C138 MOTOR VCC 14VA REG12V 8...

Page 34: ...V CONTROL V IN RF AGC NC ENABLE CLOCK DATA AFT A OUT SIF TU 30V NC V OUT 999 GND 100 AFT 732 TU V OUT 875 MOD A IN 61 MOD CTL 107 5V 26 VCR H 971 MOD VEDIO 71 IIC CLK 72 IIC DATA 781 SIF OUT 1 2 3 4 5...

Page 35: ...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 36: ...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 37: ...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 AUDIO DVD A IN R AV1 A IN L...

Page 38: ...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 SW30 DPG D V Sync 38 39 X...

Page 39: ...WITHOUT PERMISSION FROM THE ZENITH ELECTRONICS CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGI NAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC...

Page 40: ...3 35 3 36 2 TU IF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T PB REC...

Page 41: ...AVEFORM Auto Tracking is failed IC301 Pin 59 is defective PB COLOR Signal disappear IC301 Pin 57 is defective IC301 doesn t operate IC301 Pins 53 54 55 are defective PB COLOR Signal disappear X301 is...

Page 42: ...3 39 3 40 4 Hi Fi CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T PB REC 23 Pin is defective Hi Fi Audio is not appear IC801 Pins37 38 aredefective All Audio is not appear...

Page 43: ...3 41 3 42 5 JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...

Page 44: ...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 ES501 ES502 LD501 are defective Auto Rew will not worki...

Page 45: ...gger Level 340mv 500mV T 1 IC501 Pin 18 REC PB IC501 Pin 13 QUE REV IC501 Pin 13 QUE REV IC501 Pin 95 REC IC501 Pin 87 REC PB IC501 Pin 90 REC PB DPG DFG DPG DFG IC501 Pin 97 PB CTL OUT IC501 Pin 94 R...

Page 46: ...9 2 78 0 5 10 1 72 0 7 11 0 01 1 6 12 0 01 0 01 13 3 44 3 28 14 0 01 2 1 15 3 43 3 1 16 1 7 2 7 17 3 31 3 1 18 1 7 2 2 19 0 7 1 20 0 01 0 01 21 3 39 3 24 22 2 6 2 9 23 3 39 3 25 24 2 4 2 5 25 1 86 1...

Page 47: ...15 2 83 0 002 Q505 1 63 1 65 5 15 1 63 1 65 5 15 Q507 2 15 2 8 0 002 2 15 2 8 0 002 Q550 0 01 0 002 1 66 0 01 0 002 1 66 Q901 0 76 0 002 0 008 0 48 0 002 0 004 Q902 0 76 0 002 0 008 0 0 002 0 009 Q903...

Page 48: ...1 3 52 IC BLOCK DIAGRAMS IC101_ICE3B0565 IC701_LD1117A IC102_LTV 817B IC503 IC505_KIA7042P IC302_M 1225 IC504_KIA7031P IC5F1_PTC6955 IC702_78D05 IC701_LD1117A IC301_LA71206M IC801_LA72670BM IC501_M377...

Page 49: ...3 53 3 54 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP SIDE...

Page 50: ...3 55 LOCATION GUIDE...

Page 51: ...3 56 LOCATION GUIDE...

Page 52: ...3 57 3 58 2 MAIN P C BOARD BOTTOM SIDE...

Page 53: ...3 59 3 60 4 KEY P C BOARD LOCATION GUIDE 3 POWER P C BOARD LOCATION GUIDE...

Page 54: ......

Page 55: ...r 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 a...

Page 56: ...ke sure the main PCBA don t short on VCCs and switch it on Is 3 3V and 1 8V DC outputs normal on main PCBA Check the regulators or related diodes Connect to PC CN601 Cable and update the FLASH memory...

Page 57: ...ts properly Check the related circuit of ZR36868 Have TV signal output Check the filtering and amp circuit of TV signal Check AV cable connection to TV set Does Tray move inside when it is not at clos...

Page 58: ...ircuit of SLED_S SLED and SEDL outpup properly Check the amp circuit on motor driver Check the cable connection with MECHA Do not put in disc and tray close NO NO YES NO YES YES C Optical Lens has mov...

Page 59: ...spindle and main PCBA NO Laser turns on when reading disc NO NO NO NO DVD_LD or CD_LD output properly Check the laser power circuit on ZR36868 and connecting to power transistor Collector voltage of...

Page 60: ...cking control amp circuit on motor driver Check cable connection on pick up head Disc is play Check RF VC signal waveform Focus ON OK Proper signals on A B C D of ZR36868 Check connections between ZR3...

Page 61: ...on lines on ZR36868 NO YES Check the cable connection on Front pannel TEST END YES Normal Audio output when disc playback Audio DAC received correct data stream Check connection between ZR36868 Audio...

Page 62: ...WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 ZR36868 main clock is at 27MHz X501 1 0V 27MHz FIG 1 1 2 ZR36868 reset is low active PWR_CTL_H 5 3VA M_RESET FRONT...

Page 63: ...3 69 3 CN601 waveform during procedure Downloading DUPTDO DUPRDO FIG 1 3 4 Flash R W enable signal during download Downloading FRD FWR FIG 1 4...

Page 64: ...3 70 2 SDRAM CLOCK DCLK 135MHz Vp p 2 2 Vmax 2 7V FIG 2 1 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform OPEN CLOSE FIG 3 1...

Page 65: ...ELATED SIGNAL NO DISC CONDITION SLED_S 2 0V 1 4V 1 0V SLED 4 7V 4 0V 2 6V SLED 5 3V 4 0V 3 0V FIG 4 1 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION FOCUS_S 1 5V 1 4V 1 3V FACT 4 0V 3 6V 3 2V FACT 4...

Page 66: ...3 72 6 LASER POWER CONTROL RELATED SIGNAL NO DISC CONDITION MD_CD 0V 180mV MD_LD 5 0V 3 5V DVD_LD 5 0V 3 6V FIG 6 1 7 FOCUS ON WAVEFORM FOCUS_S FACT FACT FIG 7 1 DVD...

Page 67: ...3 73 FOCUS_S FACT FACT FIG 7 2 CD 8 SPINDLE CONTROL WAVEFORM NO DISC CONDITION SPINDLE_S MOT_SPDL 3 6V 2 4V MOT_SPDL 3 6V 4 8V FIG 8 1...

Page 68: ...3 74 9 TRACKING CONTROL RELATED SIGNAL System checking TRACK_S TACT TACT FIG 9 1 DVD TRACK_S TACT TACT FIG 9 2 CD...

Page 69: ...3 75 10 ZR36868 AUDIO OPTICAL AND COAXIAL OUTPUT SPDIF FIG 10 1 11 ZR36868 VIDEO OUTPUT WAVEFORM 1 100 FIG 11 1...

Page 70: ...3 76 12 ZR36868 AUDIO OUTPUT TO AUDIO DAC 2 COMPOSITE VIDEO SIGNAL FIG 11 2 FIG 12 1...

Page 71: ...3 77 FIG 13 1 13 AUDIO OUTPUT FROM AUDIO DAC...

Page 72: ...UTO ASPDIF COAX OPTICAL DVD_LD CD_LD V C M5V HOMESW OUTSW INSW TRACK_S FOCUS_S SLED_S SPINDLE_S MD_CD AL PC VCR_DATA DVD_RESET AUDIO_MUTE CN602 HYPER_TERMINAL MC DV33 IC602 M12L16161A SDRAM MD IC601 Z...

Page 73: ...P RF FOCUS_S TRACK_S SLED_S SPINDLE_S OPEN SPDL_SENS FACT TACT SLED LOAD 27MHz X TAL DVD_LD CD_LD VR_CD VR_DVD MD_CD PICKSEL HOMESW INSW OUTSW CLOSE DRVSB FLASH ROM FLASHCS MEMRD MEMWR MEMDA 0 15 MEMA...

Page 74: ...I IC301 AVCP V IN A IN_L A IN_R V OUT A OUT_L A OUT_R Y Pb Pr COAXIAL DVD_A_L DVD_A_R OPTICAL Y C DVD_VIDEO A_OUT_R A_OUT_L DVD_A_R DVD_A_L DVD_A_L DVD_A_R A IN_R A IN_L Y G Pb B Pr R ASPDIF AUDIO_MUT...

Page 75: ...3 81 3 82 A B C D E F G H I J K L M N O P Q R S T CIRCUIT DIAGRAMS 1 SYSTEM CIRCUIT DIAGRAM...

Page 76: ...3 83 3 84 2 SERVO CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...

Page 77: ...3 85 3 86 3 AV JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...

Page 78: ...3 87 3 88 IC BLOCK DIAGRAMS IC201_BA5954 IC601 ZR36868ELC IC203_LM358L IC401_PCM1735 IC602_M12L16161A IC605_KS24C021CS IC402_NJM4580D IC604 IC606_74HCT244...

Page 79: ...1 DECK MECHANISM ADJUSTMENT Fixtures and tools for service 4 12 1 Mechanism Assembly Mode Check 4 13 2 Previous Preparation for Deck Adjustment 4 14 3 Torque Measuring 4 14 4 Guide Roller Height Adjus...

Page 80: ...ft A 5 T 17 19 Arm T up 1 hook A 5 T 20 Supporter capstan Chassis Hole A 6 B 17 18 21 Belt Capstan Motor Capstan3 screws A 6 B 22 Lever F R Locking Tab A 6 B 21 22 23 Clutch Assembly D37 Washer A 6 B...

Page 81: ...ate the flat cable from the Drum FPC and the Capstan Motor 2 Release 3 screws S1 on the bottom side of the chassis and separate the drum assembly 3 Release the hooks H1 H2 and separate both the holder...

Page 82: ...SEMBLY OF DECK MECHANISM 4 3 B E C Plate Top Arm Assembly F L Gear Assembly Rack F L Opener Door Holder Assembly CST B H3 A B Lever Assembly S W H4 E Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 5 Fig A 2 6 Fi...

Page 83: ...Disassembly of Gear Assembly Rack F L Fig A 2 3 1 Separate the hook H3 while leaning ahead the hook 3 after moving the gear assembly rack F L toward the arrow A direction 2 Separate the gear assembly...

Page 84: ...rm Assembly Cleaner Fig A 3 3 1 Separate the A part of Fig A 3 1 from the embossing of chassis and hold it up while turning it anti clockwise 11 Head F E Fig A 3 4 1 Separate the A part of the head F...

Page 85: ...hile holding it upward 14 Arm Assembly Tension Fig A 4 2 1 Release the spring tension the hook H7 from the arm assembly tension 2 After releasing the hook H8 of the base tension sepa rate it while hol...

Page 86: ...e 17 Opener Lid Fig A 5 2 1 Release the B part of the opener lid from the embossing of chassis 2 Disassemble the opener lid upward while turning it anti clockwise 18 Arm Assembly Pinch Fig A 5 3 1 Hol...

Page 87: ...90 deg clockwise with a driver for disassembly 21 Belt Capstan Fig A 6 2 Motor Capstan Fig A 6 3 1 Separate the belt Capstan 2 Undo 3 screws S6 on the bottom side of chassis and dis assemble it upwar...

Page 88: ...r Fig A 7 3 1 Release the hook H11 of the gear sector and then hold the gear sector upward 26 Brake Assembly Capstan Fig A 7 4 1 Release the locking tab L2 on the bottom side of the plate slider and t...

Page 89: ...assem bly P2 and the P3 are adjusted straightly and then corre spond the gear section groove A to the plate slider hole B 32 Base Assembly P2 Fig A 8 3 Base Assembly P3 Fig A 8 4 1 Disassemble the ba...

Page 90: ...se tension from the embossing of chassis 2 Hold the base tension upward while turning it anti clock wise 35 Arm assembly Idler Jog Fig A 9 2 1 Push both B C parts in Fig A 9 2 toward the arrow directi...

Page 91: ...D00 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 0001 PAL DTN 0002 3 Torque gauge 600g Cm ATG Part No...

Page 92: ...frame and separate the deck assembly Check both the hole A of gear cam and the hole A of chassis correspond Fig C 1 5 Check the mode S W on the main P C board locates at a proper position as in B of t...

Page 93: ...les on the housing rail part of chassis to prevent detection of the end sensor If doing so proceeding to the stop mode is done In this status input signals of all modes can be received However operati...

Page 94: ...of oscilloscope to the RF envelope output point and the head switching output point 2 Tracking control playback Locate it at the center Set the RF output to the maximum value via the track ing contro...

Page 95: ...he A C head If it is Turn and adjust the tilt adjusting screw to ensure that the tape corresponds to the bottom guide of the P4 and recheck the tape path after pro ceeding play for 4 5 seconds 3 Where...

Page 96: ...n cutting off the REV mode CAUTIONS If the RF waveform is changed after adjusting the A C head perform fine adjustment to ensure the RF waveform is flat tened Adjustment Procedure 1 Connect the probe...

Page 97: ...ELOPE OUTPUT POINT V2 V1 V1 V1 V MAX 0 7 V1 V MAX 0 8 RF ENVELOPE OUTPUT HEAD RF SWITCHING OUTPUT POINT OSCILLOSCOPE Connection Diagram Waveform CH 2 CH 1 Checking Procedure 1 Check that locking time...

Page 98: ...VIEW Fig C 9 2 BOTTOM VIEW F E Head Video Head A C Head Pinch Roller Belt Capston Clutch Assembly A37 Fig C 9 3 Tape Transport System Pollution of Video Head or Tape Transport System Poor Sound Low S...

Page 99: ...C 9 4 Firstly try to use a cleaning tape 1 Use a cleaning patch if foreign materials are not removed with the cleaning tape due to severe dirty of the head Soak the cleaning patch in alcohol and put...

Page 100: ...Part PL 433 Yellow Gear Part PL 433 Yellow Boss Part Side Wall PL 433 Yellow Gear Part Side Application PL 433 Yellow Cam Part Side Application KG 684G Green Gear Sector Gear Cam Base Loading Gear Dri...

Page 101: ...PROTECTION MAINTENANCE AND CHECK OF VIDEO FUNCTION 4 22 Lever F R Base Tension GEAR AY P2 P3 LEVER F R Clutch Contact Part PL 433 Yellow Tension Arm Party Hinge Part PL 433 Yellow BASE TENSION PL 433...

Page 102: ...sensor Check syscon circuit NO YES YES YES NO NO NO 1 Deck Mechanism A NO NO NO No F R modes Is the present mode F R Mode Is the mode SW assembled correctly refer to Pages 4 14 Is the normal voltage...

Page 103: ...age 4 14 Check Pinch spring Replace Drum Motor Check Servo Syscon Check the Syscon COM No cassette loading Insert the cassette Check CST Holder Assembly Is there variation for CST IN S W Output In Tap...

Page 104: ...nsors ok Check Syscon Circuit Check Syscon 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...

Page 105: ...C Board 5V YES Is there a short 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 R...

Page 106: ...Arm Assembly Check the 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...

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

Page 108: ...EXPLODED VIEWS 4 29 008 011 031 079 017 032 024 406 031 021 028 029 026 A03 027 022 003 004 006 007 014 015 009 409 013 016 012 OPTIONAL PART A01 405 2 Moving Mechanism Section 1...

Page 109: ...EXPLODED VIEWS 4 30 052 517 061 056 518 052A 055 410 032 077 076 078 060 051 064 A11 A12 067 066 065 068 069 070 023 080 058 3 Moving Mechanism Section 2...

Page 110: ......

Page 111: ...mp 5 2 1 1 3 Clamp Upper 5 2 2 Tray Disc 5 2 3 Base Assembly Sled 5 3 3 1 Gear Feed 5 3 3 2 Gear Middle 5 3 3 3 Gear Rack 5 3 4 Rubber Rear 5 3 5 Frame Assembly Up Down 5 4 6 Belt Loading 5 4 7 Gear P...

Page 112: ...Up Down Belt Loading Gear Pulley Gear Loading Guide Up Down PWB Assembly Loading Base Main 4 Screws 1 Connector 1 Locking Tabs 1 Screw 1 Screw 1 Locking Tab 1 Locking Tab 1 Locking Tab 1 Hook 2Screw...

Page 113: ...Plate Clamp 1 1 2 Magnet Clamp 1 1 3 Clamp Upper 2 Tray Disc Fig 5 2 1 Insert and push a Driver in the emergency eject hole A at the right side or put the Driver on the Lever B of the Gear Emergency...

Page 114: ...elease the Scerw S3 4 Rubber Rear Fig 5 3 BASE PU RUBBER DAMPER RUBBER DAMPER SCREW INSERTION TORGUE CONTROL 800gf DOWN RUBBER DAMPER Distinguish upper and lower sides Assemble with care Distinguish u...

Page 115: ...Up Down Fig 5 4 1 Move the Guide Up Down in direction of arrow A as Fig A 2 Push the Locking Tab L5 down and then lift up the Guide Up Down to separate it from the Base Main When reassembling place th...

Page 116: ......

Page 117: ...D VIEWS 1 Deck Mechanism Exploded View 026 001 002 003 A01 020 018 014 013 017 435 012 019 012 440 015B 015A 015 016 A02 439 012A 012A 010 432 030 025 024 431 435 430 021 035A 439 035 036 A03 A26 032...

Page 118: ......

Page 119: ...1ULZ MOLD ZENITH NSP 283 3580R V135C DOOR VCR V98 MOLD D CST HF380 86075 284 442 681A SPRING DOOR 285 3580R T172B DOOR VCR V98 MOLD D TRAY ABS HF 380 286 4970R 0146A SPRING PLATE DR4000 SPRING CABLE A...

Page 120: ...ECTIFIERS 1N5822 GULF BK DO201AD 40V 3A ALTERNATE D123 0DR158220AA DIODE RECTIFIERS 1N5822 BK RECTRON DO201AD 40V ALTERNATE D124 0DR302000AB DIODE RECTIFIERS HER302 BK RECTRON DO201AD 100V D124 0DD400...

Page 121: ...TP PYUNG CHANG D ZD151 0DZ132609AB DIODE ZENERS GDZJ13A 26MM TP GRANDE DO34 0 ZD151 0DZ132609BB DIODE ZENER UZ 13BSA 26MM TP PYUNG CHANG ALTERNATE ZD152 0DZ100009AA DIODE ZENERS MTZ10B MINI TP ROHM Z...

Page 122: ...A SS 25V 20 FM5 TP 5 C561 0CE1064F638 CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C578 0CE2274C638 CAPACITOR ELECTROLYTIC 220M SRA 6 3V M FM5 TP 5 C579 0CE2274C638 CAPACITOR ELECTROLYTIC 220M SRA 6...

Page 123: ...0K035 INDUCTOR RADIAL LEAD 100UH 10 TP 6 X 6 TR5 L303 0LA1200K018 INDUCTOR AXIAL LEAD 120M K 2 3X3 4 L5 TP L304 0LR1000K035 INDUCTOR RADIAL LEAD 100UH 10 TP 6 X 6 TR5 L306 0LR1000K035 INDUCTOR RADIAL...

Page 124: ...412 CAPACITOR FIXED CERAMIC HIGH D 100PF 50V 5 NP0 1608 R TP C219 0CH1104K942 CAPACITOR FIXED CERAMIC TEMP C 0 1UF 50V 80 20 Y5V F 1608 C220 0CH1104K942 CAPACITOR FIXED CERAMIC TEMP C 0 1UF 50V 80 20...

Page 125: ...R TP C520 0CH1223K942 CAPACITOR FIXED CERAMIC TEMP C 0 022UF 50V 80 20 Y5V F 16 C525 0CH1104K942 CAPACITOR FIXED CERAMIC TEMP C 0 1UF 50V 80 20 Y5V F 1608 C542 0CH4681K412 CAPACITOR FIXED CERAMIC HIG...

Page 126: ...R X 1608 R T C632 0CH1103K562 CAPACITOR FIXED CERAMIC TEMP C 0 01UF 50V 10 X7R X 1608 R T C633 0CH1103K562 CAPACITOR FIXED CERAMIC TEMP C 0 01UF 50V 10 X7R X 1608 R T C634 0CH1103K562 CAPACITOR FIXED...

Page 127: ...DE SWITCHING DAP202K T146 ROHM R TP SMD 80V ALTERNATE IC201 0ILNRRH039A IC LINEAR BA5888FP ROHM 28PIN HSOP R TP IC202 0ILNRUC003A IC LINEAR LM358L UTC 8PIN SOP R TP OPAMP IC401 0IPRPTI064A IC PERIPHER...

Page 128: ...TP SOT23 ALTERNATE Q505 0TRON80009A TRANSISTOR BIPOLARS BC846ALT1 ON SEMI MOTOROLA R ALTERNATE Q507 0TR150409AC TRANSISTOR KTA1504 GR T1 ASG CHIP KEC Q601 0TR390409DA TRANSISTOR 2N3904S NPN SOT 23 TP...

Page 129: ...W 1608 5 00 D R306 0RH0000C622 RESISTOR METAL GLAZED CHIP 0 OHM 1 16 W 1608 5 00 D R307 0RH7501C622 RESISTOR METAL GLAZED CHIP 7 5K OHM 1 16 W 1608 5 00 D R308 0RH0000C622 RESISTOR METAL GLAZED CHIP...

Page 130: ...1608 5 00 D R512 0RH1001C622 RESISTOR METAL GLAZED CHIP 1K OHM 1 16 W 1608 5 00 D R513 0RH3300C622 RESISTOR METAL GLAZED CHIP 330 OHM 1 16 W 1608 5 00 D R515 0RH2700C622 RESISTOR METAL GLAZED CHIP 27...

Page 131: ...CHIP 2 2K OHM 1 16 W 1608 5 00 D R598 0RH1201C622 RESISTOR METAL GLAZED CHIP 1 2K OHM 1 16 W 1608 5 00 D R599 0RH1001C622 RESISTOR METAL GLAZED CHIP 1K OHM 1 16 W 1608 5 00 D R5C6 0RH1001C622 RESISTO...

Page 132: ...6 W 1608 5 00 D R670 0LC11608D01 INDUCTOR CHIP HB 1M1608 121JT CERATECH R TP R671 0LC11608D01 INDUCTOR CHIP HB 1M1608 121JT CERATECH R TP R682 0RH4701C622 RESISTOR METAL GLAZED CHIP 4 7K OHM 1 16 W 16...

Page 133: ...OHM 1 16 W 1608 5 00 D R912 0RH2700C622 RESISTOR METAL GLAZED CHIP 270 OHM 1 16 W 1608 5 00 D R928 0RH1001C622 RESISTOR METAL GLAZED CHIP 1K OHM 1 16 W 1608 5 00 D X301 6212AB2359C RESONATOR CRYSTAL H...

Page 134: ...THV10912B TACT DC 12 V 5 0 A V SW510 556 213C SWITCH DETECTOR THV10912B TACT DC 12 V 5 0 A V SW511 556 213C SWITCH DETECTOR THV10912B TACT DC 12 V 5 0 A V SW513 556 213C SWITCH DETECTOR THV10912B TAC...

Page 135: ...029 4261R 0037B ARM ASSEMBLY DECK MECHA PINCH D37 YAMAUC ALTERNATE 029 4261R 0037C ARM ASSEMBLY DECK MECHA PINCH D37 MEIJI ALTERNATE 032 3141R M002A CHASSIS ASSEMBLY D37 NSP 077 3300R M203A PLATE SLID...

Page 136: ...ECK MECHA FPCB 6CH D37C MO 026 4681RF0039A MOTOR ASSEMBLY DECK MECHA L D DI D37 NSP 026 4681RF0039C MOTOR ASSEMBLY DECK MECHA L D DI D37 NSP 052 4680R A015A MOTOR MECH CAPSTAN F2QVB66 SANKYO FOR D37 0...

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