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Adjustment / Maintenance > VCR Electrical Adjustment

5-2 VCR Electrical Adjustment

5-2-1 Head switching adjustment

(1) Supplement

If the SYSTEM microprocessor (IC501) or EEPROM (IC503) on VCR P.C.B is replaced, be sure to

perform the head switching adjustment.

If the drum assembly is replaced, be sure to perform the X-value adjustment and head switching

adjustment.

Fig. 5-2-1 Connection Diagram

(2) Adjustment method

1) Connect oscilloscope CH-1 to the H/SW terminal on VCR P.C.B, and CH-2 to the VCR VIDEO

terminal on VDR P.C.B.

2) Use CH-1 (H/SW) to trigger the oscilloscope.
3) Play back the alignment tape.
4) Play back the tape for approx. 3 seconds, while simultaneously holding down the REC and

PLAY buttons on recorder for several seconds (FL display: _ _).

5) Simultaneously hold down the REC and PLAY buttons on recorder for several seconds again:

The adjustment will automatically start.
When the adjustment is complete, “PG” will appear in the FL display.

6) Observe the waveforms on oscilloscope, and make sure that the phase from the vertical sync

signal to the leading edge (trigger position) of H/SW pulse is 6.5H ± 0.5H.

Fig. 5-2-2 Waveform Diagram

H/SW

(TP)

[VCR

VIDEO]

(CH2)

(CH1)

Oscilloscope

CH1 CH2

H/SW
(VCR P.C.B)

VCR P.C.B

VDR P.C.B

"VCR VIDEO"
(VDR P.C.B)

H/SW

(50µs/div.)

V-Sync

6.5H±0.5H

Trigger Point

VCR VIDEO
(500mV/div.)

(5V/div.)

Содержание DV-RV8500E

Страница 1: ...ATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT Digital Media Division Yokohama DVD VIDEO RECORDER with VIDEO CASSETTE RECORDER 2005 July SM0512 DV RV8500E PAL PAL SECAM DO NOT RESELL OR DIVERT IMPROPERLY DV RV8500E UK ...

Страница 2: ...mbly 4 1 1 Top Cover 4 1 2 Front Panel 4 2 3 FAN Motor 4 2 4 SMPS P C B 4 3 5 Deck mechanism 4 4 6 TIMER P C B 4 5 7 VCR P C B 4 5 8 DVD multi drive 4 6 9 VDR JACK and KEY P C Bs 4 6 4 3 Deck Mechanism Parts Locations 4 7 4 4 Deck Mechanism Disassembly 4 8 1 Drum assembly 4 8 2 Top plate 4 9 3 CST holder assembly 4 9 4 F L rack gear assembly 4 9 5 Door opener 4 9 6 F L arm assembly 4 9 7 S W lever...

Страница 3: ...ction Bottom view 6 4 6 2 Parts List 6 5 6 2 1 Mechanical Parts List 6 5 6 2 2 Electrical Parts List 6 6 S Schematic Wiring Diagrams S 1 S 1 Wiring Diagram S 1 S 2 S M P S Schematic Diagram S 2 S 3 SYSTEM Schematic Diagram VCR P C B S 3 S 4 TUNER Schematic Diagram VCR P C B S 4 S 5 A V Schematic Diagram VCR P C B S 5 S 6 Hi Fi Schematic Diagram VCR P C B S 6 S 7 REAR JACK Schematic Diagram VCR P C...

Страница 4: ...entified by marking with a on the schematics and the parts list in this Service Manual The use of a substitute replacement component which does not have the same safety characteristics as the HITACHI recommended replacement one shown in the parts list in this Service Manual may create shock fire or other hazards Product safety is continuously under review and new instructions are issued from time ...

Страница 5: ...observe the following cautions 1 Do not subject optical pickups to any severe vibrations or impact during movement installation or disassembly 2 When performing repair work do not perform disassembly any further than that described in this manual 3 Never turn the semi variable resistors for adjustment in optical pickup or DVD drive 4 NEVER look into the objective lens in optical pickup or directly...

Страница 6: ...composition of alloy Sn is tin Ag is silver Cu is copper Bi is bismuth Pb is lead 3 Soldering iron for servicing The temperature of soldering iron tip must be adjusted according to the points to be soldered Use an antistatic soldering iron with thermal control function When removing components take care not to damage any surrounding component or pattern When attaching components observe the heatin...

Страница 7: ...em note the regular indications in tables below Resistors Capacitors Coils Indication in list Regular indication KOHM k UF µF PF pF UH µH MH mH Parts Resistor Capacitor Coil Item Value Tolerance Power capacitance Indication No indication K k M M No indication 5 All tolerances other than 5 are indicated in schematic diagrams No indication 1 8W 1 16 W for leadless resistors with no indication All ca...

Страница 8: ...wing table and perform the designated appropriate servicing Any changes that occur in the service method will be published using service bulletin etc Do not perform any servicing other than that described in this manual 2 Fig 2 1 1 Component Location Component Exterior component DVD Multi Drive VDR P C B VCR P C B TIMER P C B JACK P C B KEY P C B SMPS P C B Deck mechanism Service method Component ...

Страница 9: ...editing of Disc Navigation or play list can be performed on this recorder recording on it and creating a play list are possible otes This recorder cannot record CD R or CD RW discs DVD R RW DVD R RW and CD R RW discs recorded using a personal computer or a DVD or CD recorder may not play if the disc is damaged or dirty or if there is dirt or condensation on the recorder s lens If you record a disc...

Страница 10: ... may therefore experience problems playing recordable DVD discs in some players Symptoms include video artifacts audio and or video dropouts and playback suddenly stopping Our company cannot take responsibility for problems playing discs recorded on this recorder in other players Is editing a DVD like editing a video tape No When you edit a video tape you need one video deck to play the original t...

Страница 11: ...on VHS videotapes onto DVD And images edited on DVD can be dubbed onto VHS videotape 3 High quality image design 1 VBR Variable Bit Rate control format ensures both high image quality and long time recording This DVD recorder uses a VBR recording format that increases the compression ratio with simple images and decreases it with complex images of larger amounts of data thus variably controlling t...

Страница 12: ...Hz DVD PCM 96 kHz 8 Hz to 44 kHz Signal to noise ratio More than 100 dB AUDIO OUT connector Harmonic distortion Less than 0 008 AUDIO OUT connector Dynamic range More than 95 dB AUDIO OUT connector Inputs AERIAL IN Aerial input 75 ohms VIDEO IN 1 0 Vp p 75 ohms sync negative RCA jack x 1 SCART x 2 AUDIO IN 0 dBm more than 47 kohms RCA jack L R x 1 SCART x 2 DV IN 4 pin i LINK IEEE 1394 standard S ...

Страница 13: ... 9 4 GB DVD RAM 8 cm 3 1 4 GB DVD RAM 8 cm 3 2 8 GB DVD RAM 12 cm 5 4 7 GB DVD RW 8 cm 3 1 4 GB DVD RW 12 cm 5 4 7 GB DVD R 8 cm 3 1 4 GB DVD R 12 cm 5 4 7 GB DVD R 4x SPEED 12 cm 5 4 7 GB DVD RW 12 cm 5 4 7 GB DVD R VHS DVD RAM DVD RW DVD R DVD RW DVD R DVD VIDEO Video CD VCD Audio CD CD DA CD R CD RW CD DA MP3 WMA JPEG VCD formatted discs VHS S VHS SQPB DV RM8500E 1 IEEE 1394 i LINK 1 Mini DIN 4...

Страница 14: ... Intro Play Disk Menu Title List Chapter List Edit Title List Edit Chapter List Playlist Divide Program Hide Program Digital Recording DV to VCR Dubbing DVD to VCR Title List Dubbing DVD to VCR Instant Timer Recording Picture Search Slow Motion Counter 0 00 00 Stop DV RV8500E Yes Yes Yes Yes No XP SP LP EP Yes No Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Karaoke VCD Yes Yes Yes No Yes Yes Yes...

Страница 15: ...etc S VIDEO IN Connect the S Video output of an external source TV Monitor VCR Camcorder etc DV IN Connect the DV output of a digital camcorder DVD VCR indicator Indicates the active DVD or VCR deck DVD VCR Toggles control between the DVD deck and the VCR deck DUBBING Press to copy DVD to VCR or VCR to DVD REC Starts recording Press repeatedly to set the recording time STOP Stops playback PLAY To ...

Страница 16: ...maining time title number chapter track number channel etc REPEAT Indicates repeat mode REC The recorder is recording Indicates when the recorder is in timer recording or a timer recording is programmed PRG Programmed playback active TTL Indicates current title A disc is inserted in the DVD deck A VHS tape is inserted in the VCR deck Indicates a DVD RW disc VR mode only disc is inserted in the DVD...

Страница 17: ...ge MARKER Marks any point during playback SEARCH Displays Marker Search menu EJECT OPEN CLOSE Opens and closes the disc tray Ejects the tape in the VCR deck TV Control Buttons POWER Turns the TV on or off INPUT Selects the TV s source PROG Selects TV s channel VOL Adjusts TV s volume MUTE Temporarily turns TV sound OFF press again to restore BACKWARD FORWARD DVD Search backward or forward VCR Rewi...

Страница 18: ... to your TV monitor EURO AV 1 AUDIO VIDEO Connect to a TV with SCART jack AUDIO OUT Left Right Connect to an amplifier receiver or stereo system COMPONENT PROGRESSIVE SCAN VIDEO OUT Y Pb Pr Connect to a TV with Y Pb Pr inputs EURO AV 2 DECODER Connect the audio video output of an external source Pay TV decoder Set Top Box VCR etc VIDEO OUTPUT Switch Select either COMPONENT PROGRESSIVE SCAN VIDEO O...

Страница 19: ... Dolby Laboratories in U S also simply referred as AC3 format Supports 5 channel full range sound and one channel for sub woofer sound playback Dynamic Range Control Adjusting the audio range of maximum and minimum levels dynamic range will improve audio signal when for example dialog is hard to hear or user is watching movies late at night Digital Theater System Sound system as for movie theaters...

Страница 20: ...9 images on 4 3 screens with black bands across the top and bottom of screen One format to play Video CD User can select desired screens and data while watching the displayed menu screen This function converts interlaced images to non interlaced images and displays them It can play back 24 frame second images included in DVD movie software etc The video signal is separated into chrominance C and l...

Страница 21: ...moving Disc A PUSH B DISC TRAY 3 1 2 Removing Video Cassette from Faulty Recorder If video cassette cannot be removed due to fault disassemble the recorder and remove the video cassette by the following procedure 1 Remove the top cover See 4 2 1 for removal procedure 2 Remove the front panel See 4 2 2 for removal procedure 3 Remove the deck mechanism See 4 2 5 for removal procedure 4 Turn the worm...

Страница 22: ...ig 3 1 5 To cancel writing press the OPEN CLOSE button and remove the disc 6 The main firmware version will then appear on the screen Pressing the REC button on this DVD recorder will start writing Fig 3 1 6 To cancel writing press the OPEN CLOSE button and remove the disc 7 When updating is complete the tray will open automatically Remove the disc 8 Turn the DVD recorder off and then on The firmw...

Страница 23: ...ate screen will appear and the drive firmware version along with the version of drive firmware on the disc will appear on the screen Fig 3 1 9 When reading the data on disc is complete the disc tray will open automatically Remove the disc 4 Press the REC button on this DVD recorder To cancel writing press the OPEN CLOSE button 5 Turn the DVD recorder off and then on The firmware is now updated 3 1...

Страница 24: ...Replace TH01 D121 cathode 5 3 V Replace D121 IC103 1 Approx 2 5 V Replace IC103 D126 cathode Voltage Replace D126 D129 cathode Voltage Replace D129 D130 cathode Voltage Replace D130 D127 anode Voltage Replace D127 D128 cathode Voltage Replace D128 Power line on VCR PCB shorted No No Yes No Yes No No No No No No No No 5 3VA 3 2 1 Troubleshooting electronic system 1 SMPS Circuit ...

Страница 25: ... circuit Check D126 and replace if necessary Check Q123 and replace if necessary Yes No Check SYSTEM microprocessor R107 Normal Yes No Check R107 and replace if necessary D128 cathode Voltage Yes Yes Yes No Check D128 and replace if necessary ZD151 Normal Check D127 and replace if necessary Yes No Check ZD151 and replace if necessary No 12VA power supply of capstan cylinder motors No REG12V FL dis...

Страница 26: ...oil in the mechanism block has dried up Stops automatically Is 12 V supplied to PMC01 8 Check CS501 CST SW and its peripheral circuits Does Hi signal appear at IC501 32 when cassette is inserted Yes Yes Check deck mechanism Yes No No No Is 5 0 V supplied to R544 Check power supply line Cassette tape does not load smoothly Does FL display change when operation button is pressed Yes No No Replace an...

Страница 27: ...height of A C head No Yes No Yes No Faulty image during playback noise on screen changes Yes No Yes No No Cylinder motor does not rotate Is 12 V supplied to PMC01 8 See No 12VA in 1 SMPS circuit PMC01 12 2 8 V IC501 34 DRUM PWM pulses IC501 34 DRUM PWM pulses PMC01 11 DFG pulses IC501 65 DFG pulses Check for short circuit between IC501 34 and PMC01 12 Check for short circuit between IC501 34 and P...

Страница 28: ...AP PWM pulses Replace IC501 Check for short circuit between IC501 33 and PMC01 9 Is 12 V supplied to PMC01 2 PMC01 9 2 8 V Yes No Yes No Yes No Yes No Yes No Yes No Capstan motor does not rotate See No CAP Vcc power supply in 1 SMPS circuit Check for short circuit between PMC01 and capstan motor IC501 33 CAP PWM pulses IC501 67 CFG pulses PMC01 1 CFG pulses Check capstan motor ...

Страница 29: ...es VIDEO signal appear at IC301 29 Does VIDEO signal appear at PMD02 7 Does VIDEO signal appear at PMD02 5 Is VIDEO signal supplied to IC901 4 Check C329 and replace if necessary Is normal status restored Is 5V supplied to IC301 4 22 47 50 52 60 84 92 Check IC501 and if necessary Check Q310 and Q905 and replace if necessary Replace VDR PCB Replace IC802 Yes No Is VIDEO signal appear at IC802 5 Che...

Страница 30: ...es approx 3 4 V appear at IC301 80 when V H SW is Hi Does Y signal appear at IC301 33 Does Y signal appear at IC301 31 Replace VDR PCB Yes No Yes No Yes No Does X301 4 43 MHz generate a signal No chroma signal during playback Is 5V supplied to IC301 4 22 47 50 52 60 84 92 Does chroma signal appear at IC301 29 Replace IC301 Replace X301 Does E E signal appear Does image appear during playback Does ...

Страница 31: ...n Check AV1 jack SC901 Check VDR PCB and replace if necessary Does signal appear at IC801 10 11 when AV3 audio is input Check AV3 jack JK764 and VDR P C B Check tuner TU701 Check AV2 jack SC901 Is power supplied to IC801 34 40 Are control signals supplied to IC801 42 43 Does audio signal appear at IC801 16 17 Does audio signal appear at PMD02 19 21 Does audio signal appear at PMD02 23 25 Check 5 0...

Страница 32: ...appear at IC801 16 17 Does audio signal appear at PMD02 19 21 Does audio signal appear at PMD02 23 25 Envelope waveform at IC801 44 At least 300 mVp p Is A head switching signal input to IC801 41 Check 5 0V and REG12V lines Check P3D01 connector Check IC501 and replace if necessary Check AV1 jack SC901 Check SYSTEM microprocessor IC501 and replace if necessary Check wiring between IC801 16 17 and ...

Страница 33: ...nd TU701 6 Yes No Yes No Yes No Yes No No Hi Fi audio can be recorded Are control signals supplied to IC801 42 43 IIs power supplied to IC801 34 40 Does audio signal appear at IC801 16 17 Does FM audio signal appear at IC801 36 Check P3D01 connector If the connector is normal replace the cylinder Replace IC801 Check 5 0V and REG12V lines Check SYSTEM microprocessor IC501 and replace if necessary C...

Страница 34: ...M circuit replace IC501 Is pressure roller compressed to capstan shaft Do supply take up reel sensors output pulses Yes No Yes No Replace reel sensors Check position alignment of cam gear see page 4 15 Stops automatically during playback and search Check SYSTEM microprocessor and replace if necessary Does supply end sensor ES502 output Hi Hi At least 3 5V Lo 0 7V or less to 1V Replace supply end s...

Страница 35: ...elt normal Replace capstan belt Replace capstan motor Replace cylinder motor Check CAP Vcc line Check 13 5VA DRUM line Check D37 clutch assembly Check position alignment of cam gear see page 4 15 Tape transport system faulty during playback Insert a cassette tape Does S W lever assembly operate normally Check output level of CS501 CST REC SW Tape with record prevention tab L H L Tape without recor...

Страница 36: ... No Yes No Yes No No No Does CS501 CST REC SW operate normally Replace CS501 CST REC SW Replace CS501 CST REC SW Cassette tape cannot be inserted Check SYSTEM circuit replace IC501 Does L D motor rotate Check L D motor or drive IC Does S W lever assembly operate normally Replace S W lever assembly Does F L arm assembly operate normally Replace F L arm assembly Does door open normally Replace door ...

Страница 37: ...ove all the components on all the routes 4 Fig 4 1 1 Disassembly Flowchart 4 2 Cabinet Disassembly Information Numbers in figures are step numbers in disassembly procedure and letters in brackets show the types of screw 1 Top Cover 1 Remove the seven screws A 2 Slightly open both ends on the front side of top cover and lift the top cover in the direction of the arrow Fig 4 2 1 Top cover TIMER P C ...

Страница 38: ... pushing the cassette door so that the cassette door open close lever is positioned outside the door Fig 4 2 2 Front Panel 3 FAN Motor 1 Unplug the connector on SMPS P C B 2 Remove two screws B from the rear panel Caution when reinstalling FAN motor Wind the cord of FAN motor around the cords on VDR P C B as shown in the figure to secure them Fig 4 2 3 FAN Motor 1 Tab A 1 Tab B 1 Tab B 1 Tab C Fro...

Страница 39: ... secure the heat sink and then separate the SMPS P C B Caution when reinstalling heat sink Secure the heat sink identified Caution in the figure on the back of P C B and make sure that a cushion is attached between the heat sink and P C B 3 Screw D 3 Screw D 3 Screw C 2 Connector 1 Power cable SMPS P C B Block 2 Connector 3 Screw E C M3X8 Black D M3X8 Silver E M3X21 Gold Fig 4 2 5 SMPS P C B 2 F M...

Страница 40: ...ism The mode switch MS501 on VCR P C B is positioned as in the figure shown below The drive gear on the back of deck mechanism is positioned as in the figure shown below While keeping the two positioning poles and guide LEDs aligned assemble the deck mechanism at right angles The boss of mode switch will fit into the hole in drive gear Fig 4 2 7 Reassembling Deck Mechanism 2 Screw D 2 Screw E 1 Co...

Страница 41: ...6 TIMER P C B 1 Remove the front holder 2 Unplug the direct connectors from the VCR P C B 3 Unplug the connector Information Release the four stoppers of front holder The TIMER P C B can be detached without removing the deck mechanism Fig 4 2 8 TIMER P C B Disassembly and Reassembly Cabinet Disassembly C M3X8 Black F M3X6 5 Gold 3 Screw F 2 Screw C 2 Screw C 3 Screw F 3 Screw F 1 FFC Connector 3 S...

Страница 42: ... P C B KEY P C B G M3X8 Silver 2 FFC 1 Connector 3 Screw G 3 Screw G Cusion DVD Multi Drive 3 Screw G Drive Holder a a b FFC Flexible flat cable 2 Screw F 2 Screw F 2 Screw F 3 Connector 1 FFC 1 FFC 1 Connector 4 Screw F 4 Screw F VDR P C B Lay out the cable from KEY PCB as shown 5 Screw D KEY P C B JACK P C B D M3X12 Silver F M3X6 5 Gold FFC Flexible flat cable 9 VDR JACK and KEY P C Bs VDR P C B...

Страница 43: ... opener Pressure arm assembly Take up arm Capstan supporter Capstan belt Capstan motor F R lever D37 clutch assembly Drive gear cam gear Sector gear Capstan brake assembly Slider plate Tension lever Spring lever Brake lever P2 gear assembly P3 gear assembly P2 base assembly P3 base assembly Loading base Tension base Jog idler arm assembly 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23...

Страница 44: ...e drum assembly and capstan motor 2 Remove three screws S1 and then remove the drum assembly upward 3 Release hooks H1 H2 only if necessary and then separate the FPC holder and FPC cap 4 4 Deck Mechanism Disassembly Drum Ass y Flat cable FPC Holder FPC Cap S 1 S 1 S 1 H2 H1 FPC Holder FPC Drum FPC Cap Diagram viewed from the opposite side ...

Страница 45: ...s Note When reinstalling first insert portion E of the CST holder assembly into the slit in chassis and then fit the remaining bosses into the slits in chassis in sequence 4 F L rack gear assembly Fig A 2 3 1 Release hook H3 and then slide the F L rack gear assembly in the direction of arrow A to remove it Note When reinstalling the F L rack gear assembly assemble the drive gear and F L rack gear ...

Страница 46: ...ig A 2 Top Plate CST Holder Ass y F L Rack Gear Ass y Door Opener F L Arm Ass y S W Lever Ass y Top Plate Fig A 2 1 F L Arm Ass y Fig A 2 5 S W Lever Ass y Fig A 2 6 CST Holder Ass y Fig A 2 2 Door Opener Fig A 2 4 F L Rack Gear Ass y Fig A 2 3 A E H3 H4 B B C E ...

Страница 47: ...f wheel gear shaft and then lift the wheel gear Fig A 3 L D Motor Ass y Wheel Gear F E Head A C Head Ass y S4 S5 A C1 H5 F E Head Fig A 3 3 A C Head Ass y Fig A 3 4 Wheel Gear Fig A 3 2 L D Motor Ass y Fig A 3 1 10 F E head Fig A 3 3 1 Turn the entire E F head in the direction of arrow A to release its engagement with chassis 11 A C head assembly Fig A 3 4 1 Remove screw S5 and then lift the A C h...

Страница 48: ...ig A 4 2 1 Release the tension spring from hook H7 of spring lever 2 Release hook H8 of tension base and then lift the tension arm assembly Fig A 4 T Brake Ass y Tension Arm Ass y S reel T reel 14 S reel and T reel Fig A 4 3 1 Lift the S reel and T reel Take care during reassembly that the S reel and T reel are not reversed S reel T reel Tension Arm Ass y Fig A 4 2 H8 H7 Tension Spring S reel Fig ...

Страница 49: ...se Ass y Lid Opener Pressure Arm Ass y Take up Arm P4 Base Ass y Fig A 5 1 A D H9 Lid Opener Fig A 5 2 Pressure Arm Ass y Fig A 5 3 Take up Arm Fig A 5 4 Chassis C B Cam Gear BOSS Take up Arm BOSS Pressure Arm Ass y Note A spring is attached between the pressure arm assembly and chassis Take care not to lose it When reinstalling the pressure arm assembly make sure that you insert the boss at porti...

Страница 50: ...2 Remove three screws S6 and then lift the capstan motor Fig A 6 Capstan Supporter Capstan Belt Capstan Motor F R Lever D37 Clutch Ass y 21 F R lever Fig A 6 4 1 Release lock tab L1 in the direction of the arrow and then lift the F R lever 22 D37 clutch assembly Fig A 6 5 1 Remove washer W1 and the lift the D37 clutch assembly D37 Clutch Ass y Fig A 6 5 S6 L1 Capstan Belt Fig A 6 2 Capstan Support...

Страница 51: ...ear and the hole in chassis 24 Sector gear Fig A 7 3 1 Release hook H11 of sector gear and then lift the sector gear 25 Capstan brake assembly Fig A 7 4 1 Release lock tab L2 from the surface of chassis and then lift the capstan brake Fig A 7 Drive Gear Cam Gear Sector Gear Capstan Brake Ass y Slider Plate Tension Lever Spring Lever Brake Lever 26 Slider plate Fig A 7 5 1 Release the engagement wi...

Страница 52: ...on of arrow A to release it from the guide hole in chassis 2 Slide the P3 base assembly in the direction of arrow B to release it from the guide hole in chassis 32 Loading base Fig A 8 5 1 Release three hooks H12 H13 H14 and then lift the loading base Hole in P2 Gear Ass y Fig A 8 2 H12 Hole in P3 Gear Ass y BOSS Tension Lever Gear Glove A Hole B in Slider Plate H14 H13 P3 Gear Ass y Fig A 8 1 P2 ...

Страница 53: ... chassis 2 Turn the tension base in the direction of the arrow to release its engagement with chassis 34 Jog idler arm assembly Fig A 9 2 1 Hold portions B and C of jog idler arm assembly on both sides and then remove the arm assembly Note Take care that portion D does not strike the chassis during disassembly Tension Base Fig A 9 1 A B C Jog Idler Arm Ass y Fig A 9 2 Chassis D ...

Страница 54: ... they are not aligned remove the L D motor assembly and then turn the cam gear until the holes are aligned 2 Make sure that the small hole in cam gear on the back of deck mechanism is aligned with hole B in drive gear If they are not aligned remove the drive gear align their positions and then reassemble the gears Disassembly and Reassembly Checking Mode after Reassembling Deck Mechanism L D Motor...

Страница 55: ... to the EURO AV1 AUDIO VIDEO jack 3 Cautions on adjustment 1 The following conditions apply when otherwise not specified Probe of oscilloscope 10 1 Synchronization of oscilloscope Internal sync 2 When performing more than one adjustment follow the specified oder 4 List of Adjustment jigs VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 Alig...

Страница 56: ...loscope 3 Play back the alignment tape 4 Play back the tape for approx 3 seconds while simultaneously holding down the REC and PLAY buttons on recorder for several seconds FL display _ _ 5 Simultaneously hold down the REC and PLAY buttons on recorder for several seconds again The adjustment will automatically start When the adjustment is complete PG will appear in the FL display 6 Observe the wave...

Страница 57: ... adjustment 1 Rough adjustment 1 Run a E 240 blank tape and check the tape run guideline on lower drum 2 If the tape rides under the tape run guideline turn the guide roller height adjustment screw to the left to adjust 3 If the tape is above the tape run guideline turn the guide roller height adjustment screw to the right to adjust 2 Fine adjustment 1 Connect oscilloscope CH 1 to the H SW termina...

Страница 58: ... C head base specifications A C Head Ass y Azimuth Adjustment Screw A Height Adjusting Screw B Tilt Adjusting Screw C X Value Adjusting Hole Fixing Screw P4 Guide Post Tape Control Head 0 2 0 25 mm from bottom edge of tape b A C head adjustment screws c A C head height adjustment 2 Tape transport check between P4 guide post and pressure roller 1 Play back a tape recorded in SP mode 2 Set to the re...

Страница 59: ...er into the hole in chassis of X value adjustment mechanical block tilt the screwdriver to the left and right until the CH 2 FM ENV output is maximal 6 Tighten the securing screw Fig 5 3 5 X Value Adjustment H SW CH1 H SW VCR P C B VCR P C B RF VCR P C B CH 1 CH 2 Oscilloscope RF CH2 a Connection Diagram Hole in Chassis Left Right A C Head Ass y X VALUE Adjusting SLIT Fixing Screw b Adjustment scr...

Страница 60: ...ape curling wrinkling check 1 Run an E 240 tape and make sure that no curling or wrinkling occurs at the start middle or end of tape 2 If curling or wrinkling occurs perform the following adjustments again Guide roller height adjustment A C head adjustment 5 3 6 Method of setting the mechanism to loading status without inserting tape 1 Unplug the power cord from AC outlet 2 Remove the top cover an...

Страница 61: ...gauge adapter and torque gauge and place them on reel Torque Gauge Torque Gauge Adaptor Reel Table 3 Check the torque values in the following operation modes Item Fast forward torque Rewind torque Playback torque Reverse search torque Operation mode Fast forward Rewind Playback Reverse search Gauge Torque gauge Torque gauge Torque meter Torque meter Measured reel Take up Supply Take up Supply Torq...

Страница 62: ...prox 3 years Approx 1 5 years Approx 1 year 2 Items necessary for maintenance and inspection 1 Head cleaning kit 2 Oil and grease for maintenance 3 Alcohol 4 Cleaning cloth 3 Cleaning video heads It is recommended that you use a generally available cleaning tape to clean the heads If noise cannot be removed completely with a cleaning tape use a cleaning cloth to clean the heads and transport syste...

Страница 63: ...phenomena Phenomenon Color beats Poor S N no color Vertical jitter horizontal jitter Low volume sound distortion Tape twisted No tape run slack tape Cause Dirt on F E head Dirt on video heads Dirt on video heads drum tape transport system Dirt on A C head Dirt on pressure roller capstan belt Insufficient torque of D37 clutch assembly Dirt on video heads drum tape transport system Portions to be ch...

Страница 64: ...ortion KG 684G Chassis L Chassis R P2 P3 guide supports KG 684G P2 P3 guide tape run portions KG 684G 5 4 2 Lubricating oil and greasing 1 Greasing procedure Coat components with an appropriate amount of grease applied to a rod or brush Take care that excessive grease does not adhere to tape transport system or drive system If there is too much grease on them use gauze moistened with alcohol to wi...

Страница 65: ... Gear Loading Base Drive Gear Cam portion KG 684G FL Rack Gear Cam portion KG 684G Side of guide KG 684G Slider Plate Brake lever moving portions KG 684G F R lever moving portion KG 684G Spring lever moving portion KG 684G Side of guide KG 684G Tension lever moving portion KG 684G Sector gear moving portion KG 684G F R Lever Clutch contact portion PL 433 Tension Base Tension arm shaft support PL 4...

Страница 66: ...mponent replacement TIMER P C B Component replacement VCR P C B Component replacement KEY P C B Component replacement A26 DVD Multi Drive Unit replacement 250 280 286 283 284 A43 A26A A00 463 463 463 463 463 470 470 470 457 457 457 457 457 463 463 469 469 469 255 256 257 276 469 464 290 459 459 459 459 457 464 291 274 469 469 469 469 468 465 465 465 452 452 452 452 469 469 469 469 469 266 264 263 ...

Страница 67: ...6 2 6 1 2 F L Mechanism Section 100 A21 A23 A24 109 A22 054A 054 115 116 110 112 113 114 103 105 102 106 107 ...

Страница 68: ...6 3 6 1 3 Deck Mechanism Section Top view 008 011 031 079 017 024 406 031 021 028 029 026 022 003 004 014 015 009 409 013 016 012 A01 405 ...

Страница 69: ...6 4 6 1 4 Deck Mechanism Section Bottom view 052 517 061 056 518 052A 055 410 077 076 078 060 051 064 067 066 065 068 069 070 023 058 A11 A12 ...

Страница 70: ...THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA ...

Страница 71: ...1 8W unless otherwise noted Special note Most semiconductor devices are electrostatically sensitive and therefore require the special handling techniques described under the Electrostatic Protection Measures section of this service manual Note Do not use the part number shown on this drawing for ordering The correct part number is shown in the parts list may be slightly different or amended since ...

Страница 72: ...00 F 2A A 2 3A 3A 4A A A 4A 5A A 5 5 5 5 5 5A A 6A 7A 7A 8A A 8A 1A 2B 3B 4B 5B 6B 7B B 8B 8 8 8 1B B B 2C 3C 4C 4C 4C 4C C C C 5C 6C 7C 8C 1C C C C 2D 3D 4D 5D 6D 6D D 6 6D 6 6 6 6 7D D D D D D 8D 8D 8 1D 2E 2 2E E 3E 3 3E E E E 4E 4E 5E 5E 6E 6E 7E 7E 8E 8E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E F 8 7 6 5 4 3 2 1 8 7 6 5 S 2 S 2 S M P S Schematic Diagram m ...

Страница 73: ... 4A 4A 4A A 4A 5A 5A 5A 5A 6A 6 6A 6A A A 7A 7A 7A 8A 1A 2B SUP RE SUP RE 2B 2 2 2B B B 3B 4B 4 4 4 4 4 4 4 4B 5B 6B 7B 8B 1B 2C 3C 4C C 4C 4 4 4C C C C C 5C 5 5 5 5 5 5C C 5C 5C 5C 6C 6C 6 7C 7C 8C C C C C C C 1C 2D 2 2 2 2 2 2 2 2 2D 2 2D D 2D 2D 2D 2D D D 3D 4D 4D D 4D D D D 4D D D 5D 6D 7D 8D 1D 2E 2E 3E 4E 5E E 6E 6E E E E E E 7E 8E 8E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E ...

Страница 74: ...A 7A A A 7 8A 1A 2B 3B B B 4B 5B 5B 5B B B 6B 6 6 7B 8B 1B 2C 3C 4C 4C 4C C C 5C C C C C C 6C 6 6C C 7C 8C 1C 2D 3D 3D 3D 3D 4D D 5D 6D 6 6 7D 8D 1D 2E 3E 4E 5E 6E E 6 6 7E E 8E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E F 8 7 6 5 4 3 2 1 8 7 6 5 S 4 S 4 TUNER Schematic Diagram VCR P C B P a ...

Страница 75: ...1A 2B 2 2 2B B 3B 4B 4B 4B B B 5B B 5 6B 6B 7B 8B 1B 2C 3C 3C 3 3 3 3C C C 3C 4C 4 4C 4C C C 4C C 4 5C 5 5C C 5 5C C 5 6C 6C 7C C 7 7 7 7 7 8C 8C 8C 1C 2D 3D D 4D 4D D D D D D D D D D D D D D 5D 5 5D D D D 5D 5 5 5 5 5 5D D 6D 7D 7 8D D 8 8 8 8D D D D D 1D 2E 2E 3E E 3 4E 5E 6E 7E 8E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E F 8 7 6 5 4 3 2 1 8 7 6 5 S 5 S 5 A V Schematic Diagram VC...

Страница 76: ...01 106 5 0V 5 0V REG12V To A V 106 REG12V 112 REG12V REG12V 112 112 A V SELECT Hi Fi AUDIO PROCESS DVD PWR CTL REAR To 5 5 RE 5 5 R 2A 2 3A 4A 4A 5A 5A 6A 6A 7A 7A 8A 8A 8A A A A A A A 1A 2B 3B 4B 4B 5B 5B 6B 6B 6B 7B 7B 8B 8B 1B 2C 0V 0V 2C 3VA 3VA 2C 3C 4C 4 5C 6C 6C 6 7C 7 7 7 8C 1C 2D 2D 3D 3D 4D 4D 5D D D D 5D 5 5 5 6D 7D D D D 7 7 7 7 7 7 7 7 7 7 7 7D D D D D 8D 8D 1D 2E 3E 4E 5E 5E 6E 6E 7E...

Страница 77: ... A A A A A A A A A 3A 4A 5A 6A 7A 7 7 7 7 7A A A 8A 1A 2B 2B 3B 4B 4B 5B 6B 7B 8B B B 8 8B B 1B 2C C 2C 3C 3 3 3 3 3 3 3 3 3 3 3 3 3C C 3C 3C 3C C 3C C C C C 3 3 3C 3C C C C C C C 4C 5C 5C 6C 7C C 7 8C C C C C 8C C C 1C 2D 2D D D D D 3D 3 4D 4D 5D 5D 5 5D D D 6D 6 7D D 8D 1D 2E 2 2 2E 2 2 2 2 2E E E E 3E 3 4E 4 5E 6E 7E 8E E E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E F 8 7 6 5 4 3 ...

Страница 78: ... 5A 6A 7A 8A 1A 2B 2B 3B 3B B B 4B 4B B 5B 6B B 7B B 8B 1B 2C 3C 3C 4C C 5C 5C 6C 6C 6 6C 7C 7C 8C 1C 2D 2D 3D 4D 5D 5D D 6D 7D 8D 1D 2E 2E 3E 3 4E E E 5E 5E 5E 6E 6 6E 7E 7 7 8E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E F 8 7 6 5 4 3 2 1 8 7 6 5 S 8 S 8 TIMER Schematic Diagram KEY Schematic Diagram c a ...

Страница 79: ...N302 3 2A 3A 4A 5A 6A 7A 8A 1A 2B 3B 4B 5B 6B 7B 8B 1B 2C 3C 4C 5C 6C 7C 8C 1C 2D 2D D 3D 4D 5D 5D 6D 6D D D D 6D 7D 7D 8D 1D 2E 3E 4E 5E 6E 7E 8E 1E 2F 3F 4F 5F 6F 7F 8F 1F 4 3 2 1 A B C D E F A B C D E F 8 7 6 5 4 3 2 1 8 7 6 5 S 9 S 9 JACK Schematic Diagram t ...

Страница 80: ...e 5Vp p IC301 Pin 74 PB REC mode 5Vp p IC301 Pin 77 REC mode 340mVp p IC301 Pin 42 PB mode 300mVp p IC301 Pin 53 PB mode 400mVp p IC301 Pin 80 PB mode 3 6Vp p V HSW IC501 Pin 23 1V 10mS REC PB MODE DV SYNC IC501 PIN 24 1V 100uS QUE REV MODE CTL IC501 Pin 74 1V 10mS Pin 75 S CTL IC501 1V 10m DFG DFG IC501 PIN 65 1V 10mS REC PB MODE CFG IC501 Pin 67 1V 10mS 14 IC301 A V IC501 SYSTEM 4 3 2 1 A B C D ...

Страница 81: ...4 98 96 0 0 97 0 0 98 4 98 4 98 99 20m 4 98 100 0 0 1 4 88 4 88 2 1 46 1 48 3 1 38 1 38 4 0 0 5 2 26 2 24 6 2 38 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 5 0 12 5 0 5 0 13 5 0 0 14 0 0 15 0 0 16 0 0 17 0 0 EE PLAY MODE PIN NO I C 7 5 1 I C 5 0 1 18 0 0 19 4 88 4 88 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 2 96 3 98 31 2 96 3 98 32 0 0 33 4 88 4 88 34 3 64 3 58 35 0 0 36 2 62...

Страница 82: ...LOCATION GUIDE C 1 C Circuit Board Diagrams C 1 VCR Circuit Board Diagram COMPONENT SIDE ...

Страница 83: ...LOCATION GUIDE C 2 CONDUCTOR SIDE ...

Страница 84: ...LOCATION GUIDE CONDUCTOR SIDE C 3 C 2 S M P S Circuit Board Diagram ...

Страница 85: ...n KEY C 4 C 3 JACK Circuit Board Diagram C 4 TIMER Circuit Board Diagram C 5 KEY Circuit Board Diagram C 5 KEY Circuit Board Diagram C 4 TIMER Circuit Board Diagram C 3 JACK Circuit Board Diagram COMPONENT SIDE CONDUCTOR SIDE ...

Страница 86: ... SMOOTING BLOCK D122 C123 L123 C125 PHOTO COUPLER IC105 ERROR AMP IC106 FEED BACK BLOCK R131 R132 C141 R133 R161 R162 12V REG S W Block IC157 R156 C155 12V 1 8V 8 7V To FAN P104 RECTIFIER SMOOTING BLOCK D129 C128 R147 RECTIFIER SMOOTING BLOCK D130 C137 R146 5 0V REG S W Block IC151 R151 C151 1 8V REG S W Block IC160 R159 C152 R167 R168 3 3V REG S W Block IC154 R154 C154 RECTIFIER SMOOTING BLOCK D1...

Страница 87: ...sc 74 69 71 80 85 86 87 89 91 90 ATT 10dB VIDEO AGC CLEAR SYNC V OUT D V SYNC Y CCD C CCD CLOCK Drive 6dB AMP FBC Video ALC SQUELCH ATT 10dB ATT 6dB 21 MIXED Y C ATT 10dB LPF CLAMP Y LPF YNR CLAMP SYNC SEP D E C LPF SPF ACC HPF C LPF NL EMPH LPF LPF HPF VCA TRAP FBC ALC Main Conv2 Main Conv1 APC ACC DET MAIN EMPH FM MOD REC TRAP REC AMP SP CH2 REC AMP SP CH1 REC AMP EP CH2 REC AMP EP CH1 MIX ATT B...

Страница 88: ...5 36 Hi Fi PB B 3 2 10 11 FM LIM Lch BPF L R AUDIO LIMIT VCO PNR AUDIO LIMIT DVD AUDIO L FRONT AV3 L FRONT AV3 R Hi Fi REC A Hi Fi REC B INPUT SW REC LPF MIX 2 10 VCO PNR AUDIO LIMIT DVD AUDIO R REC LPF Rch BPF AUDIO LIMIT BGA 308P AUDIO PROCESS OUTPUT SELECTOR EXT L EXT R Q911 Q903 Q702 Q703 A MUTE Q902 A MUTE Q912 A MUTE JK901 MIX JK901 JK902 OPTICAL COAXIAL AUDIO OUT 22 24 SC901 AV2 L R 6 2 SC9...

Страница 89: ...0X MODE S1 I Limit MODE S2 MODE S3 MODE S4 10 VDR ENA 12 DATA VDR VCR 13 DATA VCR VDR 11 VDR CLK TOP SENSOR T UP Reel SUP Reel CST IN Vcc MAIN CAP PWM CTL CTL CFG CAP REV H LD CTL V ENV V H SW DPG D V Sync 37 38 X out Xc in Xc out X in 40 41 74 75 67 21 19 82 23 34 65 24 33 20 DRUM PWM 51 Vcc OSD 85 END SENSOR 5 73 Vcc A D To From AUDIO Hi Fi TIMER To From TUNER 17 81 IIC DATA IIC CLK AFT 18 17 II...

Страница 90: ... VIDEO S VIDEO DV AV3 JK764 JK761 JK765 S VIDEO OUT JK903 Y C VCR VDR FRONT JACK 49 6 2 21 26 10 20 MIX SW901 COMP RGB 23 12 18 14 16 11 C SUPER 13 Y 15 Pb 17 Pr R Y COMP Pb COMP Pr COMP JK901 15 7 11 19 B G VIDEO OUT 20 VIDEO IN 41 VIDEO IN SC901 TU701 VIDEO OUT VIDEO OUT 40 AV2 AV1 1 3 28 19 31 S W VIDEO 4 3 2 1 A B C D E F A B C D E F 4 3 2 1 B 5 B 5 VIDEO I O Circuit Block Diagram ...

Страница 91: ...47 Milano Italia ITALY Tel 39 02 487861 Tel 39 02 38073415 Servizio Clienti Fax 39 02 48786381 2 Email customerservice italy hitachi eu com HITACHI Europe AB Box 77 S 164 94 Kista SWEDEN Tel 46 0 8 562 711 00 Fax 46 0 8 562 711 13 Email csgswe hitachi eu com HITACHI EUROPE S A S Lyon Office B P 45 69671 BRON CEDEX FRANCE Tel 33 04 72 14 29 70 Fax 33 04 72 14 29 99 Email france consommateur hitachi...

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