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LG CHASSIS PV-71A Service Manual

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LG
CHASSIS PV-71A
MODEL
SERVICE MANUAL

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Summary of Contents for LG CHASSIS PV-71A

  • Page 1 CHASSIS PV-71A MODEL SERVICE MANUAL...

  • Page 2: Troubleshooting

    TROUBLE SHOOTING NO POWER : NO STAND-BY Check if the Replace the Fuse Fuse is O.K.? Is there voltage at Check/Replace pin 9 of T801? D801, D802, 803, 804, R801, C807. Check/Replace Is there about 6.1V D806, Q801, R807, ZD801, C814, at pin 9 of IC801? IC801.
  • Page 3 NO POWER : NO MONITOR ON Check the Go to NO POWER (NO ST-BY) NO POWER(NO ST-BY) BLOCK BLOCK Is there about Check the pin 10 of P804 ; "HIGH" 6V at pin 9 of P804? ¡ Check/Replace D851, L851, Is there about 115V C860, IC851.
  • Page 4 NO RASTER Is there about 115V Go to NO POWER BLOCK at pin 3 of T701? ¡ Check/Replace F852, D850, Is there about 8V C857, R899, IC853, C863. at pin 6 of P805? ¡ Check the 8V LINE of VCD BOARD ¡...
  • Page 5 V. Deflection ERROR Does the V-A, V-B Check the vertical part of VCD signal appear at pin 4, 7 BOARD of P805? Is there about Check/Replace FR702, D702, C704, 15V at pin 3 of L731 IC701? Is there about Check;/Replace FR701, D701, C708, 44V at pin 6 of IC701? L732, C734.

  • Page 6: Vcd Board

    NO SOUND Is there about Check/Replace FR854, D855, IC601. 25V at pin 5 of IC601? Does the sound Check the Audio source line of signal appear at pin 9 VCD BOARD of P805? ¡ Check the voltage at collector of Does the sound signal appear at pin 4 Q601.
  • Page 7 20" 20" 14" P851 14"...

  • Page 8: Exploded View & Part List

    COIL,DEGAUSSING,CU 14" 42T 5.7OHM 153-276A DY DCAM1-20PLAA 20" 153-113V DY DCAD2-14SNAB 14" 170-851B LEAD SET ASSY,CPT EARTH(L=640) 20" 170-851A LEAD SET ASSY,CPT EARTH(L=460) 14" 3091V00057E CABINET ASSY,KI-20U72X KPLKU,LG (SILVER) 3091V00064A CABINET ASSY,KI-14U71 315-740H DOOR,FOR TVCR 5020V00118A BUTTON,CONTROL 20" 5020V00137A BUTTON,CONTROL 14" 4970V00001A...

  • Page 9: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS Notes; (Adjustments must be performed by the following procedures) 1. It is recommended that an isolation transformer be used when servicing this chassis to prevent electric shock and damage to test equipment. P2 POST ADJUST 2. The ac line voltage must be maintained at 230 vac, +- 10%, 50/60 hz.
  • Page 10 7. RF AGC Adjustment 1) Input PAL DIGITAL PATTERN. 2) Connect DMM to AGC(J232) test point on the Main PCB. 3) Press SVC Key on the Service Remote Controller to get into SVC mode and press PR +/- Key to select AGC. Adjust Period 4) Press VOL +/- Key until DMM reads the data on the table below.

  • Page 11: Purity And Convergence Adjustment

    PURITY & CONVERGENCE ADJUSTMENT Caution: 5. Reconnect the internal degaussing coil. Convergence and Purity have been factory aligned. Do not attempt to tamper with these alignments. 6. Position the beam bender locking rings at the 9 o'clock However, the effects of adjacent receiver components, or position and the other three pairs of tabs (2,4 and 6 pole replacement of picture tube or deflection yoke may require the magnets) at the 12 o'clock position.
  • Page 12 1.ADJUST YOKE Z-AXIS FIRST 2 .ADJUST BEAM BENDER 2 POLE TO GET EQUAL BLUE MAGNET TO GET FOUR EQUAL COLOR CIRCLES COLOR CIRCLES MAGNETS 8. Referring to above, perform the following two steps: 6. Reconnect the internal degaussing coil and apply AC power. a.
  • Page 13 ROTATION DIRECTION RING MOVEMENT OF RED OF BOTH TABS PAIRS AND BLUE BEAMS OPPOSITE POLE SAME OPPOSITE POLE SAME UP/DOWN ROCKING OF THE YOKE LEFT/RIGHT ROCKING OF THE YOKE UP/DOWN ROCKING OF THE YOKE LEET/RIGHT ROCKING OF THE YOKE CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF THE CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF...
  • Page 14 FRONT LOADING MECHANISM DISASSEMBLY ‹ Front Loading Mechanism Assembly, Parts Location ¡ ¡ 5. Arm Assembly F/L 9. Plate Ground (L) 6. Plate Reflector 3. Top Plate 8. Plate Ground (R) 6. Plate Reflector 2. Bracket Assembly 4. Holder Side(R) Assembly Cassette 1.
  • Page 15 FRONT LOADING MECHANISM DISASSEMBLY 1. Front Loading Mechanism Assembly 3. Bracket Assembly Side (R (Fig. A-3) (Fig. A-1) 1) Push the tabs(L), (R) of Bracket Assembly Side(R) to disengage with the Top Plate and remove it in the 1) Remove the Top and Bottom Covers and Front Panel. direction of arrow(A).
  • Page 16 FRONT LOADING MECHANISM DISASSEMBLY 5. Holder Assembly Cassette (Fig. A-5) 7. Spring Stopper (Fig. A-7) 1) Separate the Bracket Assembly Side(R). 1) Remove the Spring Stopper which is connected to the 2) Push the two lever tabs(L), (R) down and separate the tabs(A), (B) of the Lever Stopper(R) and the Bracket Holder Assembly Cassette and the Arm Assembly F/L Holder(R).

  • Page 17: Deck Mechanism Disassemb L Y

    DECK MECHANISM DISASSEMB L Y ‹ Deck Mechanism Parts Location TOP VIEW A/C Head Assembly Auto Head Cleaner Assembly Bracket Assembly L/D Motor Drum Brush FE Head Holder Assembly Pinch Drum Assembly Arm Assembly T/up Base Assembly Gear Pinch Cam P2/P3 Tension Arm Plate Up...
  • Page 18 DECK MECHANISM DISASSEMB L Y 1. Auto Head Cleaner Assembly (Fig. B-1) (Optional Item) 1) Push the tab(A) of Auto Head Cleaner and remove the Drum Cleaner Arm Assembly. Assembly Drum Brush NOTES: When disassembling and reassembling: a. Do not allow fingers or tools to touch the outside of the Drum.
  • Page 19 DECK MECHANISM DISASSEMB L Y 4. A/C (Audio/Control) Head Assembly 5. FE (Full Erase) Head Assembl (Fig. B-5) (Optional Item) (Fig. B-4) 1) Push two tabs(A) and remove the FE Head. 1) Unplug the A/C connector from the Loading Motor P.C.B.
  • Page 20 DECK MECHANISM DISASSEMB L Y 6. Plate Up/Supply Main Brake/T ake up Main NOTES: Brake/Body Prism Led Assembly (Fig. B-6) When disassembling and reassembling: a. (D) is engaged to the cam groove of the Gear Cam L/D 1) Plate Up and two tabs(C) are engaged in the chassis.
  • Page 21 DECK MECHANISM DISASSEMB L Y 9. Supply Reel/T ake Up Reel Assembly 11. Gear H1, H2/Lever H 1 (Fig. B-11) (Fig. B-9) 1) Push and lift up the hook(B) of Lever H1. 2) Remove the washer(A) and then lift up the Gear H1. 1) Lift up Reel(S), (T) after removing the Plate Up and 3) Lift up the Spring H1.
  • Page 22 DECK MECHANISM DISASSEMB L Y 13.Mode S/ W (Fig. B-13) 15.CAM Bracket Assembl y (Fig. B-15) 1) Lift up the Lever H1. 1) Remove three screws(A). 2) Remove the screw(A) and lift up the Mode S/W. 2) Remove the CAM Bracket Assembly. NOTE NOTE a.
  • Page 23 DECK MECHANISM DISASSEMB L Y 17. Gear Cam L/ D (Fig. B-17) 19. Gear Assembly P2/P (Fig. B-19) 1) Remove the Cam Bracket Assembly. 1) Remove the Plate Slider. 2) Remove the Gear Cam L/D. 2) Remove by pushing one hook(B) on the top side of Gear Assembly P3.
  • Page 24 DECK MECHANISM DISASSEMB L Y 21.Guide Roller Assembl (Fig. B-21) 23.Clutch Assembly T2 (Fig. B-23) 1) Remove two screws(A). 1) Remove the Gear H1 and Arm Assembly Idler. 2) Remove the Guide Roller From the Base P2/P3 by 2) Remove the washer(A). turning it.
  • Page 25 DECK MECHANISM DISASSEMB L Y 25. Holder Pinch Assembl (Fig. B-25) 27. L/D Motor Bracket Assembl (Fig. B-27) 1) Separate the Holder Pinch Assembly by pushing tab(A) 1) Remove three Screws(A). on the L/D Motor Bracket in the direction of arrow (B). 2) Push the tabs(A) and remove the L/D Motor Bracket Assembly.
  • Page 26 DECK MECHANISM DISASSEMBLY 29. L/D Motor Assembly & Worm L/D Motor & 31. Gear Pinch (Fig. B-31) L/D Motor Bracket (Fig. B-29) 1) Remove the Pinch Arm Assembly. 2) Remove the Gear CNT. 1) Remove the L/D Motor Bracket Assembly. 3) Remove the Gear Pinch.
  • Page 27 DECK MECHANISM DISASSEMB L Y 33.Gear Pinch Cam (Fig. B-33) 1) Remove the T/Up Arm Assembly. 2) Remove by pushing one tab(A) on the bottom side of the Gear Pinch Cam. NOTE When disassembling and reassembling: a. The small hole on the Gear Pinch Cam and hole of chassis should be aligned.

  • Page 28: Mechanism Adjustment

    MECHANISM ADJUSTMENT ‹ Tools and Fixtures for Deck ¡ ¡ 3. Torque gauge 2. Alignment tape 1. Cassette Torque meter Parts No: D00-D002 Parts No NTSC: DTN-0001 Parts No: D00-D006 PAL: DTN-0002 4. Torque gauge adaptor 5. Post height adjusting driver 6.
  • Page 29 MECHANISM ADJUSTMENT 1. Mechanism and Mode Switch Alignment Check Purpos e To determine if the mode switch and mechanism are in the correct position, when a tape is ejected from the loading mechanism. Test Equipment / Fixture Test Conditions VCR (VCP) State Check Point Eject Mode (with cassette ejected) Mechanism and Mode Switch Position...
  • Page 30 MECHANISM ADJUSTMENT 2. Preparation for Adjustment (T o set VCR NOTES: (VCP) to the loading state without inserting Always return the VCR(VCP) to the Front Loading Mecha- a cassette.) nism Assembly State in the following order after the above operations have been performed. 1) Unplug the Power Cord from the AC outlet.

  • Page 31: Checking Torque

    MECHANISM ADJUSTMENT 4. Checking Torque Purpos e : To insure smooth transport of the tape during each mode of operation. If tape transport is abnormal, then check the torque as indicated by the chart below . Test Equipment / Fixture Test Conditions VCR(VCP) State Torque Gauge(600 g/cm ATG) Set the VCR to each operating mode without...

  • Page 32: Guide Roller Height Adjustment

    MECHANISM ADJUSTMENT 5. Guide Roller Height Adjustment Purpos e : To regulate the height of the tape so that the bottom of the tape runs along the tape guide line on the lower drum. A. Preliminary Adjustment Adjustment Point Test Equipment / Fixture Test Conditions VCR(VCP) State Allows a good tape to play Guide Roller Height Adjustment...

  • Page 33: Audio/Control (A/C) Head Adjustment

    MECHANISM ADJUSTMENT 6. Audio/Control (A/C) Head Adjustment Purpos e : To insure that the tape passes accurately over the audio and control tracks in exact alignment in both the record and playback modes. A. Preliminary Adjustment (Height and tilt adjustment) Perform the Preliminary adjustment, when there is no Audio Output signal with a blank tape.
  • Page 34 MECHANISM ADJUSTMENT B. Confirm that the tape passes smoothly between post, then slowly turn the tilt adjustment in the counterclockwise direction to eliminate the tape the T/UP guide and the Pinch Roller (Using a curling. mirror or the naked eye). 1) After completing step A.

  • Page 35: Adjustment After Replacing Drum Assembly (V Ideo Heads)

    MECHANISM ADJUSTMENT 8. Adjustment after Replacing Drum Assembly (V ideo Heads) Purpos e : To correct for shift in the roller guide and X value after replacing the drum. Test Equipment Test Conditions Test Equipment / Fixture Adjustment Points Connection Points VCR (VCP) State Guide Roller Precise CH-1: PB RF Envelope...

  • Page 36: Audio Signal

    MECHANISM ADJUSTMENT 9-2. Check the condition between the Audio and Video Sync. (Lip Sync.) Test Conditions Test Equipment Test Equipment / Fixture Specification VCR (VCP) State Connection Points Play an alignment tape Oscilloscope Less than¡¾V CH-1: PB RF Envelope Alignment Tape CH-2: Audio Output RF Envelope Output Point...

  • Page 37: Maintenance/Inspection Procedure

    MECHANISM ADJUSTMENT 10. Maintenance/Inspection Procedure Tabel 2 1) Required Maintenance Inspection Phenomenon The recording density of a VCR(VCP) is much higher than Dirt on video head or worn Poor S/N, no color that of an audio tape recorder. VCR(VCP) components video head must be very precise, at tolerances of 1/1000mm, to ensure compatiblity with other VCRs.
  • Page 38 MECHANISM ADJUSTMENT Video Head (rotating cylinder) Head Tip Touch this section of cleaning patch to the head tip and gently Coat With Isopropyl Alcohol turn the head Fig. C-10-1 5-2) Greasing (1) Greasing guidelines Apply grease, with a cleaning patch. Do not use excess grease.
  • Page 39 MECHANISM ADJUSTMENT Replace- Phenomenon Inspection ment Color beats Dirt on full-erase head ¡Û ¨ç ¨è ¨ê ¨ç ¨ë ¡Û Poor S/N no color Dirt on video head ¨è ¨é Dirt on video head Vertical jitter ¡Û ¨é Dirt on tape transport system Low volume Dirt on audio/control head ¡Û...

  • Page 40: Deck Mechanism

    MECHANISM TROUBLESHOOTING GUIDE 1.Deck Mechanism Auto REW doesn't work. Is the output of END senser of supply side "L"? Is the supply end sensor less than 3.5V ("L") Is the voltage drop across IR LED Check the system (u-com). between 0.8~1.5V? Replace LED.
  • Page 41 MECHANISM TROUBLESHOOTING GUIDE AUTO STOP. In auto stop is the pinch roller in Replace Drum Motor. Is the output of DFG, DPG OK? contact with the capstan shaft. Are there T/up and supply reel Check Servo, Syscon. pulses. Replace Reel Sensor. Check the Syscon, u-COM.
  • Page 42 MECHANISM TROUBLESHOOTING GUIDE In PB mode Tape Presence not sensed. Is the Pinch Roller Does the Capstan attached to the Motor turn? Capstan Motor Shaft? ¨Í Does the Drum Does the T/Up Motor turn? Reel turn? ¨Î Are there DPG, Check the clutch and Is the Belt OK? DFG Pulses?
  • Page 43 MECHANISM TROUBLESHOOTING GUIDE In Eject mode, the Tape will not eject. Are the T/Up and Supply End Sensors OK? Replace the F/L S/W. Replace End Sensor. No F/R modes. Is the present mode, Eject Key-in. F/R Mode? Is the mode SW Does the Capstan Motor assembled correctly rotate?

  • Page 44: Front Loading Mechanism

    MECHANISM TROUBLESHOOTING GUIDE 2. Front Loading Mechanism Cassette cannot be inserted. Does the Lever Switch work? Is the Cassette Lever/Spring Switch damaged or omitted? Replace or add the Lever/Spring Is 5V applied to the ¥-COM Switch. Vcc port. Is 5V applied to CST switch port of Check the Power Part.
  • Page 45 MECHANISM TROUBLESHOOTING GUIDE Cassette will not load. (Tape does not thread around the drum.) Does the CST insert? Does the lid opener work? Check the Gear H1 position on the Deck. Does the Gear Cam F/L work? Replace the lid opener. Is the (R) side gear train and bracket Does the lid opener work? assembled correctly?
  • Page 46 MECHANISM TROUBLESHOOTING GUIDE Cassette will not eject. Is the Gear H1 position correct on the deck? Check the Gear H1. Does the Capstan Motor shaft rotate? Check the Capstan Motor. Does the Lever Switch work? Replace the Lever/Spring Switch. Does the Gear Cam F/L work? Does the Opener Door work? Check the Gear Train of Bracket Side (R).
  • Page 47 NOTE) marks the optional parts only in VCR (Video Cassette Recorder) Models.
  • Page 48 NOTE ) ooois the additional parts of the VCR (Video Cassette Recoder) Models.

  • Page 50: Replacement Parts List

    REPLACEMENT PARTS LIST 1. Mechanical Section LOCA.NO PART NO(GS) DESCRIPTION SPECIFICATION REMARKS ASSEMBLY PARTS SECTION 412-172B DECK ASSY D-27 N (4HD MONO VCR) 6723R-0025A DRUM ASSY (D-27 N4S) ASSY P2 225-361A BASE BASE ASSY P3 225-364A 386-394A ASSY CLEANER 386-405A ASSY T/UP ASSY L/D MOTOR 4811R-0004A...
  • Page 51 LOCA.NO PART NO(GS) DESCRIPTION SPECIFICATION REMARKS ASSY L/D 414-199B MOTOR WORM L/D MOTOR 4422R-0001A WORM WHEEL 437-020A 386-401A ASSY PINCH 340-073A HOLDER SUB ASSY PINCH BASE TENSION 225-374A LEVER 333-332A 442-645A SPRING 442-649A SPRING PINCH ASSY P2 333-334A LEVER 386-398A GEAR 435-436A 442-647A...
  • Page 52 LOCA.NO PART NO(GS) DESCRIPTION SPECIFICATION REMARKS 333-342A LEVER SWITCH 442-661A SPRING SWITCH PLATE COVER 257-074A 384-143A GUIDE 384-151A GUIDE CST27 465-040A OPENER DOOR GROUND 257-075A PLATE 340-062A HOLDER ASSY PRISM SCREW 1MPK0261418 PAN HEAD MACHINE SCREW +, - D2.6 L4.0 MSWR3/FZY PAN HEAD MACHINE SCREW P/WASH+ D2.6 L12 MSWR3/FZY 1MDC0262818...
  • Page 53 REPLACEMENT PARTS LIST 1. Mechanical Section LOCA.NO PART NO(GS) DESCRIPTION SPECIFICATION REMARKS ASSEMBLY PARTS SECTION 412-172B DECK ASSY D-27 N (4HD MONO VCR) 6723R-0025A DRUM ASSY (D-27 N4S) ASSY P2 225-361A BASE BASE ASSY P3 225-364A 386-394A ASSY CLEANER 386-405A ASSY T/UP ASSY L/D MOTOR 4811R-0004A...
  • Page 54 LOCA.NO PART NO(GS) DESCRIPTION SPECIFICATION REMARKS ASSY L/D 414-199B MOTOR WORM L/D MOTOR 4422R-0001A WORM WHEEL 437-020A 386-401A ASSY PINCH 340-073A HOLDER SUB ASSY PINCH BASE TENSION 225-374A LEVER 333-332A 442-645A SPRING 442-649A SPRING PINCH ASSY P2 333-334A LEVER 386-398A GEAR 435-436A 442-647A...
  • Page 55 LOCA.NO PART NO(GS) DESCRIPTION SPECIFICATION REMARKS 333-342A LEVER SWITCH 442-661A SPRING SWITCH PLATE COVER 257-074A 384-143A GUIDE 384-151A GUIDE CST27 465-040A OPENER DOOR GROUND 257-075A PLATE 340-062A HOLDER ASSY PRISM SCREW 1MPK0261418 PAN HEAD MACHINE SCREW +, - D2.6 L4.0 MSWR3/FZY PAN HEAD MACHINE SCREW P/WASH+ D2.6 L12 MSWR3/FZY 1MDC0262818...
  • Page 56 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as REPLACEMENT PARTS LIST Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 57 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 58 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 59 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 60 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 61 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 62 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION LOCA.
  • Page 63 The components identified by shading and * marked components for 14" model's mark are critical for safety. location numbers have 1000 lower as Replace only with part number specified. R2902 for 20"/21" is R1902 for 14". LOCA. NO PART NO DESCRIPTION SW04 140-315A...
  • Page 64 MAIN2 BLOCK DIAGRAM A-MUTE V-SYNC H-SYNC A-OUT H-OUT P.CTL M.CTL 5.3V 12V(A) 14V(C) 12V(D)
  • Page 65 VCD BLOCK DIAGRAM SOUND IF SOUND INPUT DEMO. EXIT AUDIO AUDIO INPUT P501A DEMP TUNER IF 2 DECOUP IF 1 REF-I LOOP INPUT A-IN VIDEO VERT INPUT INPUT A-OUT BANDGAP DECOUP INPUT VIDEO OUT(2V) CHROMA VERT BGIL INPUT NEGA. CVBS3(Y/C) Y/CVBS VERT INPUT...
  • Page 66 SYSTEM/AUDIO/SWITCHING BLOCK DIAGRAM JK01 FROM/TO U-COM IC04 OSC1 OSC2 VERT IC02 BLUE GL368 CST IN LED CREEN STBY LED OSD MUTE T.REC LED REC LED BLNK 4 GND LED01 REC LED(red) LED04 T.REC LED(red) LED02 STBY LED(red) LED03 CST IN LED(green) REC EQ AMP SUP REEL T/UP REEL...

  • Page 67: Y/C Block Diagram

    Y/C BLOCK DIAGRAM...
  • Page 68 SUB-IF BLOCK DIAGRAM Z02F SOUND SOUND L9453M TRAP FILTER Q03F IC01F TDA9812T Z01F 5.3V Q01F Q05F TU02F...
  • Page 69 A/V SWITCHING BLOCK DIAGRAM VPS(V-IN) TU1/TU2 AV/TU1 YC-IN(V) AV1/AV2 AV2(V-IN) AV1(V-IN) AV-OUT(V) PB(V-IN) AV1-OUT(V) TU1(V-IN) TU2-V-IN TU2-A-IN TU2(A-OUT) EE/VV AV1(A-OUT) PB(A-IN) AV/TU2 AV1(A-IN) AV(AUDIO IC) AV2(A-IN) BG/LL TU1(A-IN) EXT A-OUT(VCD)
  • Page 70 VIDEO AUDIO WAVE FORM...
  • Page 71 PB VIDEO EE VIDEO EE AUDIO PB AUDIO DRUM CONTROL CAPSTAN CONTROL PV-71A MAIN 980310...
  • Page 72 SECAM LL' or PB Audio REC(Sub Tuner) Audio PB Audio REC(Sub Tuner) Video 3854VA0028A (980415)
  • Page 73 AUDIO REC VIDEO TEXT R/G/B/FBN REC AUDIO OSD R/G/B/FB WAVE FORM SCART R/G/B/FB 3854VA0028A (980415)
  • Page 74 PB-C REC-C REC-Y PB-Y 3854VA0028A (980415)

  • Page 75: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN 3-21...
  • Page 76 6. VCD/TEXT 7. Y/C 3-25...
  • Page 77 3. A/V SWITCH 4. TUNER 2 5. KEY BOARD 3-24...
  • Page 78 2. MAIN 2 CPT PCB (14") A/V PCB CPT PCB (20/21") SWITCH PCB 3-22...

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