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Philips VR750/39 Service Manual

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Video Cassette Recorder
Service
Service
Service
Service Manual
Contents
Chapter
Adjustment Procedure
Sec. 1:
Schematic Diagrams and CBA's
Exploded Views
Mechanical and Electrical Parts Lists
Sec. 2: Standard Maintenance
Mechanism Alignment Procedures
Disassembly / Assembly of Mechanism
Deck Exploded Views
For technical data reference is made to the Service Manual of VR550/02/07/16
3103 785 22260. The present manual states only the differences.
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified
be used.
Published by BK 2004 Video Service Department
VR750
VR752
Survey of versions:
/02
PAL B/G
/07
PAL I, UK/IRELAND
/16
PAL B/G, Spain
/39
PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE
/58
PAL-BG/DK+SECAM-BG/DK,EAST-EURO
Printed in the Netherlands c Copyright reserved Subject to modification
/39
/39
GB
3103 785 22290

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Summary of Contents for Philips VR750/39

  • Page 1 Video Cassette Recorder Service VR750 Service VR752 Service Service Manual Contents Survey of versions: PAL B/G Chapter PAL I, UK/IRELAND PAL B/G, Spain Adjustment Procedure Sec. 1: PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE Schematic Diagrams and CBA's Exploded Views PAL-BG/DK+SECAM-BG/DK,EAST-EURO Mechanical and Electrical Parts Lists Sec.

  • Page 2: Operating Controls And Functions

    OPERATING CONTROLS AND FUNCTIONS [ VR750/39, VR752/39 ] The remote control Buttons for VCR feature only STANDBY/ON To record the TV channel selected at this moment. STANDBY/ON To switch off or on, interrupt menu function. 0..9 Press to select channels at VCR.
  • Page 3 Front of your VCR To switch off or on, interrupt menu function. STANDBY/ON PROGRAMME+ PROGRAMME- To select the programme number. During nor- mal or slow motion playback, press to adjust the tracking. RECORD To record the TV channel selected at this moment. FWD.

  • Page 4: Signal Name Abbreviations

    SIGNAL NAME ABBREVIATIONS [ VR750/39, VR752/39 ] Signal Name Function Signal Name Function C-POW-SW Capstan Power Switching Pulse SCART 16Pin Control Signal Color Phase Rotary Changeover C-ROTA SIgnal 4.43MHz 4.43MHz Clock C-SYNC Composite Synchronized Pulse SCART 1 8Pin Output Control...
  • Page 5 Signal Name Function Signal Name Function KEY-1 Key Scan Input Signal 1 Tape Start Position Detector ST-S Signal KEY-2 Key Scan Input Signal 2 T-REEL Take Up Reel Rotation Signal Deck Mode Position Detector LD-SW Signal TIMER+5V +5V at Timer LINE-MUTE Audio Mute Control Signal Special Playback = “H”...

  • Page 6: Disassembly Flowchart

    CABINET DISASSEMBLY INSTRUCTIONS [ VR750/39, VR752/39 ] 1. Disassembly Flowchart (1): Identification (location) No. of parts in the figures (2): Name of the part This flowchart indicates the disassembly steps to gain (3): Figure Number for reference access to item(s) to be serviced. When reassembling, (4): Identification of parts to be removed, unhooked, follow the steps in reverse order.
  • Page 7 (S-2) (S-2) (S-3) (S-3) (S-2) (S-1) (S-4) (S-1) (S-3) (S-2) [1] Top Case [3] VCR Chassis Unit (S-1) Fig. D1 (L-3) (L-2) Fig. D3 [4] Jack CBA (S-5) Desolder [2] Front Assembly (L-2) (L-1) Fig. D2 Fig. D4 1-7-5 HG493DC...
  • Page 8 [7] Cylinder Shield Cylinder Assembly FE Head (S-7) ACE Head SW507 Assembly LD-SW [6] Main CBA [8] Rear Panel (L-4) [5] Deck [5] Deck Assembly Assembly Cam Gear Hole Shaft [6] Main CBA (S-6) Hole LD-SW [6] Main CBA Fig. D6 (S-6) TOP VIEW From...

  • Page 9: Block Diagrams

    [ VR750/39, VR752/39 ] BLOCK DIAGRAMS Servo/System Control Block Diagram HG493BLS 1-9-6...

  • Page 10: Video Block Diagram

    Video Block Diagram HG493BLV 1-9-7...

  • Page 11: Audio Block Diagram

    Audio Block Diagram HG493BLA 1-9-8...

  • Page 12: Hi-Fi Audio Block Diagram

    Hi-Fi Audio Block Diagram HG493BLH 1-9-9...

  • Page 13: Power Supply Block Diagram

    Power Supply Block Diagram HG493BLP 1-9-10...
  • Page 14 [ VR750/39, VR752/39 ] MAIN 1/8 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position Ref No. Position CAPACITORS CAPACITORS RESISTORS C501 C862 R521 C502 CONNECTORS R522 C506 CL501 R523 C508 CL502 R524 C510 CL504 R525 C511 DIODES...
  • Page 15 Main 1/8 Schematic Diagram IC501 KEY VOLTAGE CHART MODE: SP/REC “ “ = SMD PLAY MODE Pin No. REC MODE KEY 1 (7 PIN) KEY 2 (8 PIN) Voltage (2.5) 0.00 ~ 0.51V POWER STOP/EJECT INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR 0.51 ~ 0.92V CH DOWN BOTH PLAY &...
  • Page 16 Main 2/8 & Sensor Schematic Diagrams FP562 MATRIX CHART MODE: SP/REC “ “ = SMD PLAY MODE REC MODE (2.5) THE SAME VOLTAGE FOR INDICATES THAT THE VOLTAGE BOTH PLAY & REC MODES. IS NOT CONSISTENT HERE. 1-10-34 1-10-35 HG493SCM2...
  • Page 17 MAIN 2/8 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position CAPACITORS RESISTORS C538 R541 C540 R542 C561 R543 C562 R544 C702 R545 C704 R546 C706 R547 C708 R548 C716 R549 C717 R566 CONNECTORS R701 CN701 R702 DIODE R703 D701 R706...
  • Page 18 MAIN 3/8 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position Ref No. Position Ref No. Position CAPACITORS CAPACITORS TRANSISTORS RESISTORS C251 C346 Q402 R401 C252 C347 Q403 R402 C253 C351 Q405 R403 C254 C352 Q406 R404 C302 C401 Q771 R407...
  • Page 19 Main 3/8 Schematic Diagram MODE: SP/REC “ “ = SMD PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR BOTH PLAY & REC MODES. IS NOT CONSISTENT HERE. 1-10-38 1-10-39 HG493SCM3...
  • Page 20 Main 4/8, Jack & Sub Jack Schematic Diagrams MODE: SP/REC “ “ = SMD PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES. 1-10-40 1-10-41 HG493SCM4...
  • Page 21 MAIN 4/8 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position CAPACITORS RESISTOR C157 R158 C158 R751 C751 R752 C752 R756 C756 R757 C757 R758 CONNECTORS R759 CL151 TEST POINT CL152 CL509 MISCELLANEOUS DIODES JK751 D153 JK756 D154 JK757 D155 JK758...
  • Page 22 MAIN 5/8 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position Ref No. Position CAPACITORS DIODES RESISTORS C002 D023 AA-1 R009 C003 D051 BB-2 R011 C004 D052 CC-3 R012 C005 D053 BB-2 R013 C006 D055 BB-2 R014 C007 D056 AA-2 R015...
  • Page 23 Main 5/8 Schematic Diagram CAUTION ! CAUTION ! MODE: SP/REC PLAY MODE For continued protection against fire hazard, Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. REC MODE replace only with the same type fuse. If Main Fuse (F001) is blown, check to see that all components in the power supply (2.5) circuit are not defective before you connect the AC plug to the AC power supply.
  • Page 24 Main 6/8 Schematic Diagram MODE: SP/REC PLAY MODE REC MODE (2.5) THE SAME VOLTAGE FOR INDICATES THAT THE VOLTAGE IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES. “ “ = SMD MAIN 6/8 Schematic Diagram Parts Location Guide Ref No. Position Ref No.
  • Page 25 Main 7/8 Schematic Diagram MODE: SP/REC PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES. “ “ = SMD MAIN 7/8 Schematic Diagram Parts Location Guide Ref No. Position CAPACITORS C370...
  • Page 26 Main 8/8 Schematic Diagram MODE: SP/REC PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES. “ “ = SMD MAIN 8/8 Schematic Diagram Parts Location Guide Ref No. Position CAPACITORS C640...
  • Page 27 Main CBA Top View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! For continued protection against fire hazard, SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
  • Page 28 Main CBA Bottom View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! For continued protection against fire hazard, SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
  • Page 29 Main CBA Parts Location Guide Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position CAPACITORS CAPACITORS CAPACITORS CAPACITORS RESISTORS RESISTORS RESISTORS RESISTORS C002 C340 C475...
  • Page 30 Jack CBA Top View Jack CBA Parts Location Guide Ref No. Position Ref No. Position CAPACITORS TRANSISTORS C101 Q101 C102 Q102 C103 RESISTORS C104 R101 C105 R103 C107 R104 C108 R106 C109 R108 C110 R109 C111 R110 C112 R112 C113 R113 C115 R115...
  • Page 31 AFV Schematic Diagram MODE: SP/REC PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES. “ “ = SMD AFV Schematic Diagram Parts Location Guide Ref No. Position CAPACITORS CONNECTOR DIODE...
  • Page 32 AFV CBA Top View AFV CBA Bottom View AFV CBA Parts Location Guide Ref No. Position CAPACITORS CONNECTOR DIODE COILS RESISTORS CRYSTAL OSCILLATOR 1-10-63 1-10-62 BHC400F01093...

  • Page 33: Wiring Diagram

    [ VR750/39, VR752/39 ] WIRING DIAGRAM 1-12-2 HG493WI...

  • Page 34: Ic Pin Function Descriptions

    IC PIN FUNCTION DESCRIPTIONS [ VR750/39, VR752/39 ] IC501( SERVO / SYSTEM CONTROL IC ) Signal Active Function Name Level “H” ≥ 4.5V, “L” ≤ 1.0V SCART 2 RGB 27 OUT RGB- Signal Active Through Control Function THROUGH Name Level...
  • Page 35 Signal Active Signal Active Function Function Name Level Name Level VPS/PDC Data Audio Mute Control IN DAVN-L 83 OUT A-MUTE Receive = “L” Signal N.U. Not Used N.U. Not Used Composite N.U. Not Used IN C-SYNC PULSE Synchronized Pulse IN P-DOWN-L Power Voltage Down SCART 1 8Pin Detector Signal 59 OUT 8POUT-1...

  • Page 36: Lead Identifications

    LEAD IDENTIFICATIONS [ VR750/39, VR752/39 ] KIA339F EL 2SC2785(F,H,J) 2SA1015-GR(TPE2) LM339DT BA1F4M-T 2SA1020(Y) BN1F4M-T 2SC1815-BL(TPE2) BN1L4M-T 2SC1815-GR(TPE2) KRA103M 2SC1815-Y(TPE2) KRA104M 2SC2120-Y(TPE2) KRC103M 2SC3266-Y(TPE2) KTA1266(GR) KTA1267(GR,Y) KTA1281(Y) KTC3203(Y) KTC3199(BL,GR,Y) KTC3205(Y) PT6958-FN-TP 2SK3566 E C B E C B EL817A EL817B EL817C...
  • Page 37 PRODUCT SAFETY NOTE: Products marked with a h have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. NOTES: Parts that not assigned part numbers (-----------) are not available.
  • Page 38 ELECTRICAL PARTS LIST Pos. 12 NC Description C302 CHIP CERAMIC CAP.(1608) B K 0.022UF/50V C303 ELECTROLYTIC CAP. 1UF/50V M H7 C304 ELECTROLYTIC CAP. 1UF/50V M H7 C305 CHIP CERAMIC CAP. F Z 0.22UF/16V C307 CHIP CERAMIC CAP.(1608) B K 0.047UF/50V C308 CHIP CERAMIC CAP.(1608) B K 0.022UF/50V C309...
  • Page 39 ELECTRICAL PARTS LIST Pos. 12 NC Description C401 ELECTROLYTIC CAP. 47UF/6.3V M H7 C402 ELECTROLYTIC CAP. 220UF/6.3V M H7 C403 CERAMIC CAP. B K 470PF/100V C404 FILM CAP.(P) 0.018UF/100V J C411 CHIP CERAMIC CAP. B K 1000PF/50V C412 CHIP CERAMIC CAP. B K 1800PF/50V C414 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V C415...
  • Page 40 ELECTRICAL PARTS LIST Pos. 12 NC Description C511 ELECTROLYTIC CAP. 100UF/6.3V H7 C512 CHIP CERAMIC CAP.(1608) F Z 0.1UF/50V C513 CHIP CERAMIC CAP.(1608) CH J 22PF/50V C514 CHIP CERAMIC CAP.(1608) CH J 22PF/50V C515 CHIP CERAMIC CAP. CH J 18PF/50V C516 CHIP CERAMIC CAP.
  • Page 41 ELECTRICAL PARTS LIST Pos. 12 NC Description C859 ELECTROLYTIC CAP. 47UF/6.3V M H7 C862 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V CN701 9965 000 23394 AFV PCB ASSEMBLY CPU2900/G473 DIODES D001 4822 130 31933 RECTIFIER DIODE 1N4005 D002 4822 130 31933 RECTIFIER DIODE 1N4005 D003 4822 130 31933 RECTIFIER DIODE 1N4005 D004...
  • Page 42 ELECTRICAL PARTS LIST Pos. 12 NC Description COILS J902 4822 526 10685 BEAD CORE B16 RH 3.5X10X1.3 JK756 4822 265 11659 RCA JACK(YELLOW) MSP-281V4-B JK757 4822 265 11661 RCA JACK(WHITE) MSP-281V1-B JK758 9965 000 00423 RCA JACK(RED) MSP-281V3-A JW001 9965 000 13795 FLAT CABLE, 11P AWG26#2651/P1.25/150 JW002 9965 000 13795 FLAT CABLE, 11P AWG26#2651/P1.25/150 L001...
  • Page 43 ELECTRICAL PARTS LIST Pos. 12 NC Description R005 CARBON RES. 1/6W G 680 OHM R006 METAL OXIDE FILM RES. 1W J 1.8 OHM R007 CARBON RES. 1/6W J 22K OHM R008 CARBON RES. 1/6W J 100K OHM R009 CARBON RES. 1/6W G 3.3K OHM R011 CARBON RES.
  • Page 44 ELECTRICAL PARTS LIST Pos. 12 NC Description R321 CARBON RES. 1/6W J 33 OHM R322 CHIP RES.(1608) 1/10W J 75 OHM R323 CARBON RES. 1/6W J 33 OHM R324 CHIP RES.(1608) 1/10W J 47K OHM R325 CHIP RES.(1608) 1/10W J 33 OHM R326 CHIP RES.(1608) 1/10W 0 OHM R330...
  • Page 45 ELECTRICAL PARTS LIST Pos. 12 NC Description R468 CHIP RES.(1608) 1/10W J 5.6K OHM R469 CHIP RES.(1608) 1/10W J 5.6K OHM R470 CHIP RES.(1608) 1/10W J 39K OHM R471 CHIP RES.(1608) 1/10W J 39K OHM R472 CHIP RES.(1608) 1/10W J 150 OHM R473 CHIP RES.(1608) 1/10W J 150 OHM R474...
  • Page 46 ELECTRICAL PARTS LIST Pos. 12 NC Description R555 CHIP RES.(1608) 1/10W J 10K OHM R557 CHIP RES.(1608) 1/10W J 10K OHM R566 CHIP RES.(1608) 1/10W J 56K OHM R616 CHIP RES.(1608) 1/10W J 10K OHM R621 CHIP RES.(1608) 1/10W J 10K OHM R622 CHIP RES.(1608) 1/10W J 10K OHM R638...
  • Page 47 ELECTRICAL PARTS LIST Pos. 12 NC Description TU701 9965 000 23395 TUNER UNIT TMDZ2-761A VR501 9965 000 05260 CARBON P.O.T. 100K OHM B X301 9965 000 05629 X’TAL 4.433619MHZ X501 9965 000 12194 X’TAL 12.000MHZ X502 9965 000 12288 X’TAL 32.768KHZ(20PPM) SUB JACK CBA(MCV-B) CAPACITORS C751...
  • Page 48 ELECTRICAL PARTS LIST Pos. 12 NC Description R113 CARBON RES. 1/6W J 4.7K OHM R115 CARBON RES. 1/6W J 4.7K OHM R116 CARBON RES. 1/6W J 15K OHM R117 CHIP RES.(1608) 1/10W J 10K OHM R118 CARBON RES. 1/4W J 68 OHM R119 CHIP RES.(1608) 1/10W J 75 OHM R120...

  • Page 49: Front Panel

    EXPLODED VIEWS [ VR750/39, VR752/39 ] Front Panel 1-17-4 HG493FEX...
  • Page 50 [ VR750/39, VR752/39 ] Cabinet 2L011 2L011 2B18 2L011 See Electrical Parts List for parts with this mark. Some Ref. Numbers are not in sequence. 2L011 2B10 JACK CBA 2L012 2L011 2L022 2L042 2L021 2L021 2L021 2L051 2L021 2L022 SUB JACK CBA...
  • Page 51 [ VR750/39, VR752/39 ] Packing Some Ref. Numbers are not in sequence. X20A X20B X20C Unit 1-17-6 HG493PEX...
  • Page 52 PRODUCT SAFETY NOTE: Products marked with a h have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don’t degrade the safety of the product through improper servicing. MECHANICAL PARTS LIST Pos.

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Vr752/39

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