Philips VR340/55 Service Manual Download Page 38

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THE SAME VOLTAGE FOR

BOTH PLAY & REC MODES.

INDICATES THAT THE VOLTAGE

IS NOT CONSISTENT HERE.

MODE: SP/REC

PLAY MODE

REC MODE

5.0

(2.5)

“ “ = SMD

AFV Schematic Diagram ( C, D )

1-11-17

1-11-18

HE494SCAFV

Comparison Chart of
Models and Marks

MODEL

MARK

VR340/55

VR340/75

VR740/55

VR740/75

AFV Schematic Diagram
Parts Location Guide

Ref No.

Position

A-1

B-1

A-1

B-1

C11

C-2

C12

C-2

C13

B-2

C14

A-2

C15

A-2

C16

A-2

C17

A-2

C19

A-2

C20

A-2

C21

A-1

C22

A-2

C24

B-2

CN1

C-1

B-2

IC1

A-1

A-2

A-1

B-2

B-1

B-2

A-1

B-1

CRYSTAL OSCILLATORS

DIODES

ICS

COILS

RESISTORS

CAPACITORS

CONNECTORS

Summary of Contents for VR340/55

Page 1: ...Procedures Disassembly Assembly of Mechanism Deck Exploded Views Survey of types VR340 VR740 Video Cassette Recorder Survey of versions 55 75 PAL 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 2003 Video Service Department Printed in Japan c Copyright reserved Subject to modification GB 3...

Page 2: ...ram Parts Location Guide 1 11 7 Main 3 5 Schematic Diagram Parts Location Guide 1 11 8 Main 3 5 Schematic Diagram 1 11 9 Main 4 5 Schematic Diagram 1 11 11 Main 4 5 Schematic Diagram Parts Location Guide 1 11 13 Main 5 5 Schematic Diagram Parts Location Guide 1 11 14 Main 5 5 Schematic Diagram C D 1 11 15 AFV Schematic Diagram C D 1 11 17 Main CBA Top View 1 11 19 Main CBA Bottom View 1 11 21 Main...

Page 3: ...1 2 1 3 Video S N Y R P dB 40 45 SP Mode W O Burst 1 4 Video Color S N AM R P dB 37 41 SP Mode 1 5 Video Color S N PM R P dB 30 36 SP Mode 1 6 Resolution PB Line 230 245 SP Mode 2 Servo 2 1 Jitter Low µsec 0 07 0 12 SP Mode 2 2 Wow Flutter 0 3 0 5 SP Mode 3 Normal Audio 3 1 Output PB dBV 9 6 3 SP Mode 3 2 Output R P dBV 9 6 1 5 SP Mode 3 3 S N R P dB 36 41 SP Mode 3 4 Distortion R P 1 0 4 0 SP Mod...

Page 4: ... especially 1 Wires covered with PVC tubing 2 Double insulated wires 3 High voltage leads D Use specified insulating materials for hazardous live parts Note especially 1 Insulation tape 2 PVC tubing 3 Spacers 4 Insulators for transistors E When replacing AC primary side components transformers power cord etc wrap ends of wires securely about the terminals before solder ing F Observe that the wires...

Page 5: ...nput and output terminals microphone jacks earphone jacks etc is lower than or equal to the specified value in the table below Measuring Method Power ON Insert load Z between B earth ground power cord plug prongs and exposed accessible parts Use an AC voltmeter to measure across the terminals of load Z See Fig 2 and the following table AC Line Voltage Clearance Distance d d 110 to 240 V Auto VR340...

Page 6: ...e the flat pack IC with tweezers while apply ing the hot air 3 Bottom of the flat pack IC is fixed with glue to the CBA when removing entire flat pack IC first apply soldering iron to center of the flat pack IC and heat up Then remove glue will be melted Fig S 1 6 4 Release the flat pack IC from the CBA using twee zers Fig S 1 6 Caution 1 Do not supply hot air to the chip parts around the flat pac...

Page 7: ... pins of the flat pack IC you can remove it easily Fig S 1 3 2 Affix the wire to a workbench or solid mounting point as shown in Fig S 1 5 3 While heating the pins using a fine tip soldering iron or hot air blower pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig S 1 5 4 Bottom of the flat pack IC is fixed with glue to the CBA when removing e...

Page 8: ...ur due to a potential difference caused by electro static charge during unpacking or repair work 1 Ground for Human Body Be sure to wear a grounding band 1MΩ that is prop erly grounded to remove any static electricity that may be charged on the body 2 Ground for Workbench Be sure to place a conductive sheet or copper plate with proper grounding 1MΩ on the workbench or other surface where the semi ...

Page 9: ...88 ON POWER ON PWR ON REC REC ON REC PAUSE REC Blinks at 0 8Hz interval T REC OTR ON T REC OFF T REC incomplete Blinks at 0 8Hz interval When reel and capstan mechanism is not functioning correctly 1 Blinks at 0 8Hz interval When tape loading mechanism is not func tioning correctly 2 Blinks at 0 8Hz interval When cassette loading mechanism is not functioning correctly 3 Blinks at 0 8Hz interval Wh...

Page 10: ...he Deck Mechanism Assembly and press the PLAY button The tape will be loaded into the Deck Mechanism Assembly Make sure the power is on connect TP507 SENSOR INHIBITION to GND This will stop the function of Tape Start Sensor Tape End Sensor and Reel Sensors If these TPs are con nected before plugging in the unit the function of the sensors will stay valid See Fig 1 Note Because the Tape End Sensors...

Page 11: ...F FWD button 17 STOP button 18 VOL ume buttons 19 TV button 20 SPEED SYSTEM button 1 STANDBY ON button 2 Cassette compartment 3 STOP EJECT button 4 FWD button 5 PLAY button 6 REW button 7 RECORD button 8 Display window See below 9 CHANNEL buttons 10 PWR Power indicator 11 TAPE IN indicator 12 REC indicator 13 Timer indicator 14 CLOCK indicator PWR REC 10 11 14 12 13 15 AC power cord 16 AUDIO OUT j...

Page 12: ... batteries CAUTION Install two R6 batteries matching the polarity indicated inside the battery compartment To insert the batteries NOTE You can use this remote control to operate some PHILIPS TVs Press VCR before pressing VCR feature buttons press TV before pressing TV feature buttons if you have a PHILIPS TV VR340 75 ...

Page 13: ...t 3 STOP EJECT button 4 F FWD button 5 PLAY button 6 REW button 7 RECORD button 8 Display window See below 9 CHANNEL buttons 10 A V CONNECTORS 13 PWR Power indicator 14 TAPE IN indicator 15 REC indicator 16 Timer indicator 17 CLOCK indicator PWR REC 13 14 17 15 16 18 AC power cord 19 AUDIO OUT jacks 20 AUDIO IN jacks 21 AERIAL terminal 22 VIDEO OUT jack 23 VIDEO IN jack 24 RF OUT terminal Install ...

Page 14: ... batteries CAUTION Install two R6 batteries matching the polarity indicated inside the battery compartment To insert the batteries NOTE You can use this remote control to operate some PHILIPS TVs Press VCR before pressing VCR feature buttons press TV before pressing TV feature buttons if you have a PHILIPS TV VR740 75 ...

Page 15: ...TL AMP Output D CONT Drum Motor Control Signal D PFG Drum Motor Phase Frequency Generator D REC H Delayed Record Signal D V SYNC Dummy V sync Output DRV CLK LED Clock Driver IC Control Clock DRV DATA LED Clock Driver IC Control Data DRV STB LED Clock Driver IC Chip Select Signal END S Tape End Position Detect Signal FE H GND Ground for Full Erase Head FF REW L CTL Frequency Characteristics Switchi...

Page 16: ...ESET 5V 5V at System Reset Signal RF SW Video Head Switching Pulse SIF Intermediate Frequency ST S Tape Start Position Detector Signal T REEL Take Up Reel Rotation Signal TIMER 5V 5V at Timer TU AUDIO Tuner Audio Input Signal TU VIDEO Tuner Video Input Signal TUN SW1 Tuner System Control Signal Output TUN SW2 Tuner System Control Signal Output V ENV Video Envelope Comparator Signal V IN Video Sign...

Page 17: ...AUTION Locking Tabs L 1 and L 2 are fragile Be careful not to break them 1 Remove five Screws S 2 two Screws S 3 and Screw S 4 Then slowly lift the VCR Chassis Unit Deck Assembly Jack CBA and Main CBA up 2 When reassembling solder wire jumpers as shown in Fig 5 3 Before installing the Deck Assembly be sure to place the pin of LD SW on Main CBA as shown in Fig 6 Then install the Deck Assembly while...

Page 18: ... Deck Assembly FE Head Cylinder Assembly ACE Head Assembly 5 Main CBA BOTTOM VIEW From FE Head From Cylinder Assembly From ACE Head Assembly Lead with blue stripe Printing side Lead with blue stripe From Capstan Motor Assembly Lead connections of Deck Assembly and Main CBA Desolder Desolder S 4 W 1 W 1 Fig 4 ...

Page 19: ...1 8 3 HE274DC LD SW Pin Hole Hole Shaft Cam Gear 5 Main CBA 4 Deck Assembly 5 Main CBA SW507 LD SW Pin Fig 5 ...

Page 20: ... trace with 10 1 probe V Range 0 001 50V Div F Range DC AC 20MHz 2 Alignment Tape 4822 395 10283 Head Switching Position Adjustment Purpose To determine the Head Switching point during playback Symptom of Misadjustment May cause Head Switching noise or vertical jitter in the picture Reference Notes Playback the Alignment tape and adjust VR501 so that the V sync front edge of the CH1 video output w...

Page 21: ...T USED IN ELECTRICAL ADJUSTMENTS Tuner Unit Antenna In Video In Audio In Audio Out Video Out Antenna Out Main CBA Main CBA Tuner Unit Antenna In Video In Audio In R Audio Out R Audio Out L Video Out Antenna Out Audio In L Comparison Chart of Models and Marks Model Mark VR340 55 VR340 75 VR740 55 VR740 75 A B C D Main CBA Top View A B C D POWER SUPPLY BLOCK POWER CTL BLOCK VIDEO BLOCK Hi Fi BLOCK S...

Page 22: ... 12V AL 5V LD SW AL 5V D502 S LED FROM TO POWER SUPPLY BLOCK A MUTE H KEY SWITCH KEY SWITCH TP507 SENS INH M CAPSTAN MOTOR SMD NOTE FOR WIRE CONNECTORS 1 PREFIX SYMBOL CN MEANS CONNECTOR CAN DISCONNECT AND RECONNECT 2 PREFIX SYMBOL CL MEANS WIRE SOLDER HOLES OF THE PCB WIRE IS SOLDERED DIRECTLY TEST POINT INFORMATION INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB USED TO INDICA...

Page 23: ... 41 Q307 BUFFER Q304 BUFFER 88 89 90 91 L SP EP R 82 83 84 85 72 71 57 59 54 52 51 61 28 D V SYNC D V SYNC 27 36 17 19 18 MAP BPF BPF D E NL EMPHA C COMB COMB AMP CCD LPF BPF KIL Q302 Q303 PEAKING AMP 32 31 EE AGC REC FM EQ PB FM EQ FM MOD DETAIL ENH W D CLIP CLAMP MAIN CBA 94 74 WF2 WF1 TP301 C PB WF3 38 JK751 V OUT JK753 V IN F 34 REC VIDEO SIGNAL PB VIDEO SIGNAL MODE SP REC SMD NOTE FOR WIRE CO...

Page 24: ... 2 PREFIX SYMBOL CL MEANS WIRE SOLDER HOLES OF THE PCB WIRE IS SOLDERED DIRECTLY TEST POINT INFORMATION INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE USED TO INDICATE A TEST POINT WITH NO TEST PIN USED TO INDICATE A TEST POINT WITH A TEST PIN Comparison Chart of Models Marks Model Mark VR340 55 VR340 75 VR740 55 ...

Page 25: ... MAIN CBA Hi Fi A R 7 Hi Fi COM 8 Hi Fi A L 9 CN253 TO AUDIO BLOCK IC451 MTS SAP Hi Fi AUDIO PROCESS Hi Fi HEAD AMP Hi Fi Audio Block Diagram C D HE494BLH 1 10 7 1 10 8 REC AUDIO SIGNAL PB AUDIO SIGNAL Mode SP REC 6 44 49 63 N A PB ALC MUTE 57 SMD NOTE FOR WIRE CONNECTORS 1 PREFIX SYMBOL CN MEANS CONNECTOR CAN DISCONNECT AND RECONNECT 2 PREFIX SYMBOL CL MEANS WIRE SOLDER HOLES OF THE PCB WIRE IS S...

Page 26: ...pply circuit are not defective before you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail HE274BLP 1 10 9 1 10 10 COLD MAIN CBA HOT CIRCUIT BE CAREFUL HOT IC001 ERROR VOLTAGE DET Q002 Q003 Q001 F001 L003 LINE FILTER BRIDGE RECTIFIER D001 D004 1 2 3 4 Q004 SHUNT REGULATOR REG AC001 T001 AL 32V AL 15V 12 P ON L AL 12V AL 5V P ON 9...

Page 27: ... fied in the parts list may create shock fire or other hazards Capacitor Temperature Markings Capacitors and transistors are represented by the fol lowing symbols Notes 1 Do not use the part number shown on these draw ings for ordering The correct part number is shown in the parts list and may be slightly different or amended since these drawings were prepared 2 To maintain original function and r...

Page 28: ...12 C 1 C521 A 2 Q502 A 2 R618 E 4 C522 A 2 Q503 D 1 R620 E 4 C523 A 2 R621 C 4 C524 A 2 R501 B 1 R623 C 4 C525 A 2 R502 B 2 R624 C 4 C526 A 2 R503 C 2 R851 D 3 C527 B 2 R504 B 1 R852 D 3 C528 A 2 R505 B 1 R853 D 4 C529 A 2 R506 C 1 R854 D 4 C530 B 2 R509 D 1 C535 E 1 R511 E 2 SW506 D 1 C545 A 3 R513 E 2 C542 A 4 R514 E 2 VR501 B 1 C547 B 1 R516 D 2 C553 E 4 R517 D 3 X501 D 2 C851 E 3 R518 F 3 X502...

Page 29: ... MODE REC MODE 1 2 3 5 0 5 0 2 5 SMD Comparison Chart of Models and Marks MODEL MARK VR340 55 A VR340 75 B VR740 55 C VR740 75 D IC501 KEY VOLTAGE CHART 0 00 0 51V POWER STOP EJECT 0 51 0 92V CH DOWN REW 0 92 1 27V CH UP PLAY 1 27 1 61V FF 1 61 1 98V 1 98 2 39V REC OTR 2 39 2 90V 2 90 3 60V S INH 3 60 4 30V 4 30 5 00V KEY OFF KEY OFF KEY 1 7 PIN KEY 2 8 PIN ...

Page 30: ... 11 6 HE274SCM2 THE SAME VOLTAGE FOR BOTH PLAY REC MODES INDICATES THAT THE VOLTAGE IS NOT CONSISTENT HERE MODE SP REC PLAY MODE REC MODE 1 2 3 5 0 5 0 2 5 SMD Comparison Chart of Models and Marks MODEL MARK VR340 55 A VR340 75 B VR740 55 C VR740 75 D ...

Page 31: ... 3 C723 H 1 R755 H 3 C751 H 3 R756 H 2 C752 H 3 SW501 J 2 CN701 K 1 SW502 J 2 SW503 K 2 SW505 K 2 IC561 J 4 SW507 J 3 SW509 J 2 L561 G 3 SW510 K 2 L562 G 3 SW511 K 2 L701 I 2 SW512 K 2 L702 I 1 SW513 L 2 L704 G 1 SW514 L 2 Q504 L 4 FP562 H 4 Q505 L 4 JK751 I 3 JK752 I 3 J30 J 2 JK753 I 2 J912 J 2 JK754 I 2 R534 J 3 JK755 I 2 R535 J 3 TU701 H 2 R536 J 3 R537 J 3 TP505 K 4 R538 K 3 TP507 K 2 R539 K ...

Page 32: ...2 R403 N 2 C315 Q 1 C407 M 2 R256 N 2 R404 N 2 C317 Q 2 C409 N 2 R257 N 2 R405 N 2 C318 Q 2 C410 M 1 R302 O 1 R406 N 2 C319 Q 2 C411 N 1 R303 O 2 R408 N 2 C320 Q 2 C412 N 1 R304 O 2 R409 N 2 C321 Q 2 C413 O 2 R305 O 1 R410 N 2 C323 Q 2 C414 O 2 R306 O 1 R414 N 2 C324 Q 2 C416 O 4 R307 O 1 R415 N 2 C326 Q 3 C420 N 4 R308 O 1 R416 N 2 C327 Q 3 C421 N 4 R309 O 1 R417 N 1 C328 Q 3 C423 N 4 R310 O 1 R4...

Page 33: ...E274SCM3 THE SAME VOLTAGE FOR BOTH PLAY REC MODES INDICATES THAT THE VOLTAGE IS NOT CONSISTENT HERE MODE SP REC PLAY MODE REC MODE 1 2 3 5 0 5 0 2 5 SMD Comparison Chart of Models and Marks MODEL MARK VR340 55 A VR340 75 B VR740 55 C VR740 75 D ...

Page 34: ...r continued protection against fire hazard replace only with the same type fuse CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F1001 is blown check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit t...

Page 35: ...V 2 L010 U 2 R027 T 1 C051 V 2 L012 V 2 R028 T 2 C053 V 1 L052 V 2 R029 U 1 C056 V 1 R052 V 2 C057 V 1 Q001 T 2 R054 V 2 C060 V 2 Q002 T 2 R058 V 1 C061 W 2 Q003 T 1 R060 V 1 C070 W 2 Q004 U 1 R061 V 1 Q053 V 2 R067 W 3 D001 T 3 Q054 W 2 R068 W 2 D002 T 3 Q055 V 2 R069 W 2 D003 T 3 Q056 V 1 R070 V 3 D004 T 3 Q057 V 1 R071 V 2 D005 T 2 Q059 V 3 R073 W 3 D006 T 2 R076 W 1 D007 T 1 R001 S 2 R077 W 2 ...

Page 36: ...1 C457 Y 1 R452 Y 1 C458 Z 1 R453 Z 2 C459 Z 1 R454 Z 2 C461 Z 2 R455 Z 2 C462 Z 2 R456 Z 3 C463 Z 2 R458 Y 3 C464 Z 3 R459 Y 3 C465 Z 3 R460 X 3 C466 Z 3 R461 X 2 C467 Y 3 R462 X 2 C468 Y 3 R463 X 2 C469 Y 3 R464 X 2 C470 Y 3 R465 X 2 C471 Y 3 R466 X 2 C472 Y 3 R467 X 2 C473 Y 3 R470 X 3 C474 X 3 R471 X 3 C475 X 3 R472 X 1 C476 X 2 R473 X 1 RESISTORS CAPACITORS ICS CAPACITORS ...

Page 37: ...CATES THAT THE VOLTAGE IS NOT CONSISTENT HERE MODE SP REC PLAY MODE REC MODE 1 2 3 5 0 5 0 2 5 1 11 15 1 11 16 HE494SCM5 Main 5 5 Schematic Diagram C D SMD Comparison Chart of Models and Marks MODEL MARK VR340 55 A VR340 75 B VR740 55 C VR740 75 D ...

Page 38: ...dels and Marks MODEL MARK VR340 55 A VR340 75 B VR740 55 C VR740 75 D AFV Schematic Diagram Parts Location Guide Ref No Position C1 A 1 C4 A 1 C5 B 1 C6 A 1 C7 A 1 C8 B 1 C11 C 2 C12 C 2 C13 B 2 C14 A 2 C15 A 2 C16 A 2 C17 A 2 C19 A 2 C20 A 2 C21 A 1 C22 A 2 C24 B 2 CN1 C 1 D2 B 2 IC1 A 1 L1 A 1 L2 A 2 L3 A 1 L4 B 2 R1 B 1 R4 B 2 R5 A 1 R6 A 1 X1 B 1 CRYSTAL OSCILLATORS DIODES ICS COILS RESISTORS ...

Page 39: ...EN TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT A VARIABLE ISOLATION TRANSFORMER IS REQUIRED CAUTION For continued protection against fire hazard replace only with the same type fuse CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F1001 is blown check to see that all components in the power supply circuit are not defective before you connec...

Page 40: ... ABILITY TO INCREASE THE INPUT SLOWLY WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT A VARIABLE ISOLATION TRANSFORMER IS REQUIRED CAUTION For continued protection against fire hazard replace only with the same type fuse CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F1001 is blown check to see that all components in the power supply cir...

Page 41: ...STORS TRANSISTORS RESISTORS RESISTORS RESISTORS TEST POINTS CRYSTAL OSCILLATORS SWITCHES MISCELLANEOUS VARIABLE RESISTORS Ref No Position Ref No Position Ref No Position Ref No Position Ref No Position C001 F 3 C330 D 2 C459 B 3 C547 C 1 D058 F 1 C003 F 3 C331 D 2 C461 B 3 C551 F 1 D059 F 1 C004 G 3 C332 C 2 C462 C 3 C552 B 1 D070 F 1 C005 G 2 C333 C 2 C463 C 3 C553 E 1 D301 D 2 C006 G 2 C334 D 2 ...

Page 42: ... 2 C6 A 2 C7 A 2 IC1 B 2 C8 A 2 C11 A 2 L1 A 1 C12 A 2 L2 B 1 C13 B 1 L3 A 2 C14 A 1 L4 A 2 C15 B 1 C16 B 1 R1 A 2 C17 B 1 R4 B 2 C19 A 1 R5 A 1 C20 A 1 R6 B 2 C21 A 1 C22 A 1 X1 B 2 C24 B 2 RESISTORS CRYSTAL OSCILLATORS CAPACITORS CONNECTORS DIODES ICS COILS SW1 CBA Top View SW2 CBA Top View SW1 CBA Bottom View SW2 CBA Bottom View BHE274F01011C BHE274F01011E ...

Page 43: ...50mV x 10 UPPER WF2 WF2 LOWER V OUT 0 1V x 10 RF SW 0 5V x 10 50usec C PB 10mV x 10 RF SW 0 5V x 10 5msec WAVEFORMS 1 12 1 U27WFP TP751 of Main CBA TP751 of Main CBA TP502 of Main CBA UPPER LOWER TP502 of Main CBA TP301 of Main CBA ...

Page 44: ... 5 AL 5V 6 AL 5V 7 IIC BUS SCL 8 IIC BUS SDA 9 1 2 3 4 5 6 7 8 9 CN701 CN1 1 POWER 2 GND CL509 AC CORD ANT IN ANT OUT VIDEO L 2 HEAD VIDEO R 2 HEAD Hi Fi AUDIO L HEAD Hi Fi AUDIO R HEAD M DRUM MOTOR PG SENSOR MAIN CBA SW1 CBA BHE274F01011C BHE274F01011A AFV CBA BHC400F01091 DECK ASSEMBLY NOTE FOR WIRE CONNECTORS 1 PREFIX SYMBOL CN MEANS CONNECTOR CAN DISCONNECT AND RECONNECT 2 PREFIX SYMBOL CL MEA...

Page 45: ...EJ 4 51V 5 00V 5 00V CL 0 00V 0 25V 0 00V SB 1 06V 1 50V 1 21V TL 0 66V 1 05V 0 91V FB 1 99V 2 60V 2 17V SF 1 51V 1 98V 1 80V SM 3 20V 3 75V 3 40V AU 0 26V 0 65V 0 44V AL 4 51V 5 00V 5 00V SS 2 61V 3 19V 2 97V RS Symbol Loading Status EJ Eject CL Eject REW Reel SB REW Reel Stop B TL Stop B Brake Cancel FB Brake Cancel FF REW SF FF REW Stop M FF REW SM Stop M FF REW Stop A AU Stop A Play REC AL Pla...

Page 46: ...O CL EJ SS SS AU AU TL LD SW CL SS LM FWD M REV C DRIVE Z ON ON REC EE PB C F R DRUM ROTATION P ON A MUTE H D REC H YCA DATA AU AL AU SF SM EJ AU RS SF SM TL FB AL SB 9 81 78 67 83 33 POWER OFF STOP PLAY RS FS STILL PLAY STOP PLAY DISPLAY SB TL SB FB SM AL AL RS AU AL SM 0 8S 0 2S 0 3S 1 0S 0 2S 0 8S MONO 1 5S HIFI 1 0S 0 2S 0 8S 0 2S 1 2S 0 2S 20mS 0 4S 40mS 0 2S 0 2S 0 3S 0 2S 20mS 40mS 0 4S 0 2...

Page 47: ... A LD REV FF LD REV LD REV LD FWD LD FWD LD FWD LD FWD LD FWD LD FWD LD FWD REC PAUSE REC REC REW LD FWD LD REV LD REV LD REV LD REV LD REV LD REV PAUSE REC or PAUSE STOP EJECT STOP EJECT STOP EJECT 2 STOP A FF STOP A REW STOP A REC PAUSE PAUSE or REC STOP A EJECT STOP FF STOP REW STOP REC REC REC PAUSE STOP FB FB SF SF SM SM AL AL SM AL AL AL AU AU SM TL SB EJ RS RS SM SM SF AU AU SS SS SS SF AU ...

Page 48: ...1 SP Mode Fig 3 18 RF SW F AD Internal Signal C DRIVE PB CTL 78 C F R 16 H A SW 15 ROTA AT H Z H L L ST BL STILL FRAME ADVANCE STILL The first rise of RF SW after a rise in F AD signal Stop detection T2 Slow Tracking Value Acceleration Detection T1 Reversal Limit Value 20ms ...

Page 49: ...8 RF SW F AD Internal Signal C DRIVE PB CTL 78 C F R 16 H A SW 15 ROTA STILL STILL AT ST BL Stop detection T2 Acceleration Detection T1 Slow Tracking Value Reversal Limit Value FRAME ADVANCE The first rise of RF SW after a rise in F AD signal 20ms ...

Page 50: ...LD REV LD REV 0 5S PIN NO CL EJ SS SS AU AU TL LD SW CL SS LM FWD M REV C DRIVE Z ON ON REC EE PB C F R DRUM ROTATION P ON A MUTE H D REC H YCA DATA PAUSE SLOW AU AL AL AU SF SM EJ AU RS SF SM TL FB AL SB 9 81 78 67 83 33 POWER OFF STOP PLAY RS FS STILL SLOW PLAY STOP PLAY DISPLAY SB TL SB FB SM AL AL RS AU AL SS AU AL SM 0 8S 0 2S 0 3S 1 0S 0 2S 0 8S MONO 1 5S HIFI 0 5S 0 2S 0 8S 0 2S 1 2S 0 2S 2...

Page 51: ... A LD REV FF LD REV LD REV LD FWD LD FWD LD FWD LD FWD LD FWD LD FWD LD FWD REC PAUSE REC REC REW LD FWD LD REV LD REV LD REV LD REV LD REV LD REV PAUSE REC or PAUSE STOP EJECT STOP EJECT STOP EJECT 2 STOP A FF STOP A REW STOP A REC PAUSE PAUSE or REC STOP A EJECT STOP FF STOP REW STOP REC REC REC PAUSE STOP FB FB SF SF SM SM AL AL SM AL AL AL AU AU SM TL SB EJ RS RS SM SM SF AU AU SS SS SS SF AU ...

Page 52: ...IN REMOC ON IN Remote Control Sensor L 15 OUT C ROTA Color Phase Rotary Changeover SIgnal H L 16 A B N U Not Used C D OUT H A SW Video Head Amp Switching Pulse H L 17 A B N U Not Used C D IN H A COMP Head Amp Comparator Signal H L 18 OUT RF SW Video Head Switching Pulse H L 19 A B N U Not Used C D OUT HiFi H SW HiFi Audio Head Switching Pulse H L 20 N U Not Used 21 A B OUT TUN SW1 Tuner System Con...

Page 53: ... Mark IN OUT Signal Name Function Active Level 66 N U Not Used 67 IN P ON L Power On Signal at Low L 68 OUT DRV DATA LED Clock Driver IC Control Data H L 69 OUT DRV STB LED Clock Driver IC Chip Select Signal H L 70 OUT DRV CLK LED Clock Driver IC Control Clock H L 71 OUT I2C BUS SCL I2 C BUS Control Clock H L 72 IN OUT I2 C BUS SDA I2 C BUS Control Data H L 73 OUT P OFF H Power Off at High L 74 N ...

Page 54: ...ency Generator PULSE 91 AMPVR EF OUT V Ref for CTL AMP 92 AMPVR EFIN V Ref for CTL AMP 93 P80 C P80 C Terminal 94 OUT CTL Playback Record Control Signal H L 95 OUT CTL Playback Record Control Signal H L 96 AMPC CTL AMP Connected Terminal 97 CTLAM Pout To Monitor for CTL AMP Output PULSE 98 AMPVc c AMPVcc 99 AVcc A D Converter Power Input Standard Voltage Input 100 N U Not Used Pin No Mark IN OUT S...

Page 55: ...J H F K KRA103M KRC103M 2SC1815 BL TPE2 2SC1815 Y TPE2 2SC1815 GR TPE2 2SC2120 Y TPE2 KTC3203 Y 2SC1815 BL TPE2 2SA1015 GR TPE2 E C B E C PT204 6B 12 MID 32A22 5 4 8 1 CAT24WC02JI BR24C02F W 2SK3566 PT 6958 FN TP 60 LA72638M 21 40 41 20 1 80 61 G D S 1 14 28 15 B1 E B2 C1 C2 RN1511 TE85R FMG4A T148 KTC3879Y RTK KTC3875Y RTK C B E 80 LA71586M QSZAA0RMB145 31 50 51 30 1 100 81 LEAD IDENTIFICATIONS ...

Page 56: ...1 C012 ELECTROLYTIC CAP 10UF 50V M H7 1 1 1 1 C017 ELECTROLYTIC CAP 470UF 16V M 1 1 1 1 C020 ELECTROLYTIC CAP 1000UF 16V M 1 1 1 1 C021 ELECTROLYTIC CAP 470UF 10V M 1 1 1 1 C025 CERAMIC CAP AX X K 5600PF 16V 1 1 1 1 C026 ELECTROLYTIC CAP 47UF 16V M 1 1 1 1 C051 ELECTROLYTIC CAP 47UF 16V M H7 1 1 1 1 C053 ELECTROLYTIC CAP 220UF 6 3V M 1 1 1 1 C056 CERAMIC CAP AX F Z 0 047UF 16V 1 1 1 1 C057 CHIP CE...

Page 57: ... 1 1 1 1 C336 CHIP CERAMIC CAP CH J 470PF 50V 1 1 1 1 C337 CHIP CERAMIC CAP B K 0 01UF 50V 1 1 1 1 C338 ELECTROLYTIC CAP 47UF 6 3V M H7 1 1 1 1 C339 CHIP CERAMIC CAP B K 0 01UF 50V 1 1 1 1 C340 CHIP CERAMIC CAP B K 0 01UF 50V 1 1 1 1 C341 CHIP CERAMIC CAP B K 0 01UF 50V 1 1 1 1 C342 CHIP CERAMIC CAP F Z 0 1UF 50V 1 1 1 1 C344 ELECTROLYTIC CAP 1UF 50V M H7 1 1 1 1 C345 ELECTROLYTIC CAP 1UF 50V M H7...

Page 58: ...ECTROLYTIC CAP 1UF 50V M H7 1 1 1 1 C510 ELECTROLYTIC CAP 22UF 10V M H7 1 1 1 1 C511 ELECTROLYTIC CAP 100UF 6 3V H7 1 1 1 1 C512 CHIP CERAMIC CAP F Z 0 1UF 50V 1 1 1 1 C513 CHIP CERAMIC CAP CH J 22PF 50V 1 1 1 1 C514 CHIP CERAMIC CAP CH J 20PF 50V 1 1 1 1 C515 CHIP CERAMIC CAP CH J 18PF 50V 1 1 1 1 C516 CHIP CERAMIC CAP CH J 18PF 50V 1 1 1 1 C517 CHIP CERAMIC CAP B K 4700PF 50V 1 1 1 1 C518 CHIP C...

Page 59: ...30 41487 RECTIFIER DIODE BA157 1 1 1 1 D014 4822 130 32715 SCHOTTKY BARRIER DIODE SB340 1 1 D014 5322 130 81917 SCHOTTKY BARRIER DIODE SB140 1 1 D015 9965 000 15310 ZENER DIODE DZ 8 2BSAT265 1 1 1 1 D018 4822 130 30621 SWITCHING DIODE 1N4148M 1 1 1 1 D019 9965 000 12904 ZENER DIODE DZ 5 1BSBT265 1 1 1 1 D021 4822 130 30621 SWITCHING DIODE 1N4148M 1 1 D022 4822 130 31933 RECTIFIER DIODE 1N4005 1 1 ...

Page 60: ... 42959 TRANSISTOR KTA1266 GR 1 1 1 1 Q056 4822 130 10145 RES BUILT IN TRANSISTOR KRA103M 1 1 1 1 Q057 4822 130 10098 RES BUILT IN TRANSISTOR KRC103M 1 1 1 1 Q059 4822 130 10098 RES BUILT IN TRANSISTOR KRC103M 1 1 Q301 4822 130 10103 TRANSISTOR KTC3199 Y 1 1 1 1 Q302 9965 000 13682 CHIP TRANSISTOR KTC3879Y RTK 1 1 1 1 Q303 9965 000 13682 CHIP TRANSISTOR KTC3879Y RTK 1 1 1 1 Q304 9965 000 13683 CHIP...

Page 61: ...6W J 1 OHM 1 1 1 1 R078 CARBON RES 1 6W J 2 2 OHM 1 1 R253 CHIP RES 1608 1 10W J 12K OHM 1 1 1 1 R256 CHIP RES 1608 1 10W J 47K OHM 1 1 R257 CHIP RES 1608 1 10W J 2 7K OHM 1 1 1 1 R302 CHIP RES 1608 1 10W J 12K OHM 1 1 R303 CHIP RES 1608 1 10W J 10K OHM 1 1 1 1 R304 CHIP RES 1608 1 10W J 18K OHM 1 1 1 1 R305 CHIP RES 1608 1 10W J 22K OHM 1 1 1 1 R306 CHIP RES 1608 1 10W J 100K OHM 1 1 R306 CHIP RE...

Page 62: ...31 CHIP RES 1608 1 10W J 3 3K OHM 1 1 R432 CHIP RES 1608 1 10W 0 OHM 1 1 1 1 R451 CHIP RES 1608 1 10W J 6 8K OHM 1 1 R452 CHIP RES 1608 1 10W J 39K OHM 1 1 R453 CHIP RES 1608 1 10W J 470 OHM 1 1 R454 CHIP RES 1608 1 10W J 2 7K OHM 1 1 R455 CHIP RES 1608 1 10W J 220K OHM 1 1 R456 CHIP RES 1608 1 10W 0 OHM 1 1 R458 CHIP RES 1608 1 10W J 39K OHM 1 1 R459 CHIP RES 1608 1 10W J 6 8K OHM 1 1 R460 CHIP R...

Page 63: ... CHIP RES 1608 1 10W J 10K OHM 1 1 R557 CHIP RES 1608 1 10W J 10K OHM 1 1 1 1 R566 CHIP RES 1608 1 10W J 56K OHM 1 1 1 1 R601 CHIP RES 1608 1 10W J 10K OHM 1 1 R605 CHIP RES 1608 1 10W J 10K OHM 1 1 1 1 R611 CHIP RES 1608 1 10W J 10K OHM 1 1 R612 CHIP RES 1608 1 10W J 10K OHM 1 1 R618 CHIP RES 1608 1 10W J 10K OHM 1 1 1 1 R620 CHIP RES 1608 1 10W J 10K OHM 1 1 1 1 R621 CHIP RES 1608 1 10W J 10K OH...

Page 64: ...1 1 TU701 9965 000 12893 TUNER UNIT TMDG1 632A 1 TU701 9965 000 12265 TUNER UNIT TMDG2 631A 1 TU701 9965 000 13684 TUNER UNIT TMDG2 837A 1 1 VR501 9965 000 05260 CARBON P O T 100K OHM B 1 1 1 1 X302 9965 000 05629 X TAL 4 433619MHZ 1 1 1 1 X501 9965 000 12194 X TAL 12 000MHZ 1 1 1 1 X502 9965 000 12288 X TAL 32 768KHZ 20PPM 1 1 1 1 SW1 CBA MCV C 1 1 SW513 4822 276 13954 TACT SWITCH KSM0614B 1 1 JW...

Page 65: ...1 18 1 HE274FEX EXPLODED VIEWS Front Panel A1X A1X VR340 55 75 VR740 55 75 ...

Page 66: ...t for parts with this mark Some Ref Numbers are not in sequence A5 A5 SENSOR CBA RS501 SENSOR CBA MAIN CBA AC001 A10 2B34 2B8 2B11 2L041 C D A B C D C D A C SW1 CBA SW2 CBA AFV CBA 2L043 2L044 Comparison Chart of Models and Marks Model Mark VR340 55 VR340 75 VR740 55 VR740 75 A B C D 2B40 2B40 2L045 2B55 C D Cabinet ...

Page 67: ...4PEX X1 X26 S3 Unit X20 X20A X20B X20C X20D X3 X2 X4 S1 A14 Some Ref Numbers are not in sequence S2 S2 A C B D Comparison Chart of Models and Marks Model Mark VR340 55 VR340 75 VR740 55 VR740 75 A B C D S5 Packing ...

Page 68: ...8 BIND HEAD 1 1 1 1 2L043 4822 502 14012 P TIGHT SCREW 3X8 BIND 1 1 2L044 4822 502 14012 P TIGHT SCREW 3X8 BIND 1 1 2L099 9965 000 13027 SCREW P TIGHT M3X8 BIND HEAD 1 1 1 1 PACKING S1 GIFT BOX CARTON HE274PD 1 S1 GIFT BOX CARTON HE275AD 1 S1 GIFT BOX CARTON HE494PD 1 S1 GIFT BOX CARTON HE495AD 1 S2 STYROFOAM HB300UD 1 S2 STYROFOAM HB4P0UD 1 S2 STYROFOAM KID U23LC H79P0UD 1 1 S3 UNIT BAG E5500UD 1...

Page 69: ...ANICAL ALIGNMENT PROCEDURES 2 3 1 DISASSEMBLY ASSEMBLY PROCEDURES OF DECK MECHANISM 2 4 1 ALIGNMENT PROCEDURES OF MECHANISM 2 4 9 DECK EXPLODED VIEWS 2 5 1 DECK PARTS LIST 2 6 1 Sec 2 Deck Mechanism Section I Standard Maintenance I Mechanism Alignment Procedures I Disassembly Assembly of Mechanism I Deck Exploded Views I Deck Parts List ...

Page 70: ...l only H Hours Check I Change Deck Periodic Service Schedule Ref No Part Name 1 000 H 2 000 H 3 000 H 4 000 H B2 Cylinder Assembly I I B3 Loading Motor Assembly I B8 Pulley Assembly I I B587 Tension Lever Assembly I I B31 AC Head Assembly I B573 B574 Reel SP D2 Reel TU D2 I B37 Capstan Motor I I B52 Cap Belt I I B73 FE Head I B133 B134 Idler Gear Idler Arm I I B410 Pinch Arm Assembly I I B414 M Br...

Page 71: ... hard material but since it is very thin avoid cleaning it vertically 2 Wait for the cleaned part to dry thoroughly before operating the unit 3 Do not reuse a stained head cleaning stick or a stained chamois cloth Cleaning of Audio Control Head Clean the head with a cotton swab Procedure 1 Remove the top cabinet 2 Dip the cotton swab in 90 isopropyl alcohol and clean the audio control head Be care...

Page 72: ...t Tape FL6N8 2 Head model FL6NS8 4 Head model Azimuth and X Value Adjustment of Audio Control Head Adjustment of Envelope Waveform J 2 Guide Roller Adj Screwdriver Available Locally Guide Roller J 3 Mirror Available Locally Tape Transportation Check J 4 Azimuth Adj Screwdriver Available Locally A C Head Height J 5 X Value Adj Screwdriver Available Locally X Value ...

Page 73: ... that the Moving guide preparations are in the Eject Position 4 Turn the LDG Belt in the appropriate direction shown in Fig M1 until the Moving guide prepara tions come to the Eject Position Stop turning when the preparations begin clicking or can not be moved further However the tape will be left wound around the cylinder 5 Turn the LDG Belt in the appropriate direction con tinuously and the cass...

Page 74: ... the X value and envelope Not good Do the final tape traveling test to see that the tape runs normally in play mode with out creasing or slacking Completion Not good OK OK OK Not good Not good OK Flowchart of Alignment for tape traveling 1 A 1 A 1 B 1 C 1 C 1 D 1 D 1 B 1 C 1 B 1 C 1 A 1 Tape Interchangeability Alignment Note To do these alignment procedures make sure that the Tracking Control Circ...

Page 75: ...sition of the Audio Control Erase Head Symptom of Misalignment If the Horizontal Position of the Audio Control Erase Head is not properly aligned maximum envelope can not be obtained at the Neutral position of the Tracking Control Circuit 1 Connect the oscilloscope to TP301 C PB and TP501 CTL on the Main CBA Use TP502 RF SW as a trigger 2 Playback the Gray Scale of the Alignment Tape FL6NS8 and co...

Page 76: ...of Guide Roller 2 Refer to Fig M3 so that the waveform looks like the one shown in Fig M9 4 If the envelope is as shown in Fig M8 adjust the height of Guide Roller 3 Refer to Fig M3 so that the waveform looks like the one shown in Fig M9 5 When Guide Rollers 2 and 3 Refer to Fig M3 are aligned properly there is no envelope drop either at the beginning or end of track as shown in Fig M9 Note Upon c...

Page 77: ... T DM1 DM6 Desolder 3 S 2 8 8 Loading Motor Assembly T DM1 DM7 Desolder LDG Belt 2 S 3 9 9 AC Head Assembly T DM1 DM7 S 4 10 2 Tape Guide Arm Assembly T DM1 DM8 P 2 11 10 C Door Opener T DM1 DM8 L 4 12 11 Pinch Arm B T DM1 DM8 P 3 13 12 Pinch Arm Assembly T DM1 DM8 14 14 FE Head Assembly T DM1 DM9 S 5 15 15 Prism T DM1 DM9 S 6 16 2 15 Sensor Gear T DM1 DM15 17 2 Slider Shaft T DM10 L 5 18 17 C Dri...

Page 78: ...n for Installation Refer to Deck Exploded Views for lubrication 33 32 Loading Arm TU Assembly B DM2 DM14 Refer to Alignment Sec Pg 2 4 9 34 2 25 M Brake TU Assembly T DM1 DM15 P 7 Brake Belt 35 2 25 M Brake SP Assembly T DM1 DM15 P 8 36 35 Tension Lever Assembly T DM1 DM15 37 36 T Lever Holder T DM15 L 12 38 34 Reel TU D2 T DM1 DM15 39 38 M Gear T DM1 DM15 40 36 Reel SP D2 T DM1 DM15 41 32 36 Movi...

Page 79: ...2 4 3 U27NPCASIADA 14 13 11 10 12 7 46 8 30 40 16 39 38 42 41 43 9 34 15 36 35 Fig DM1 Top View 29 32 20 33 24 25 27 26 23 28 31 21 22 Fig DM2 Bottom View ...

Page 80: ...and pull up the right side on 2 to release Pin A and Pin B from the slots A Then remove Pin C and Pin D on 2 from the slots B as shown Fig DM4 2 Pin A Slots B Pin C Pin B Pin D Pull up Slide Slot A Slot A 1 2 A 3 4 5 6 L 1 L 2 P 1 Fig DM5 L 3 Fig DM6 View for A Desolder from bottom Lead with Red Stripe L 14 46 47 7 S 2 A ...

Page 81: ...te Stripe A 8 9 S 4 S 3 LDG Belt 28 11 13 12 A 10 L 4 Adj Screw P 3 P 2 When reassembling 10 and 12 confirm that pin of 10 and pin of 12 are in the groove of 28 as shown Pin of 12 Pin of 10 Groove of 28 View for A Fig DM8 Fig DM9 14 15 S 6 S 5 16 Fig DM10 18 17 19 S 7 L 5 P 4 ...

Page 82: ... 28 as shown in the left figure and then install 23 while pressing the spring P 5 to the direction of the arrow in the left figure and confirming that the position of the spring P 5 is placed as shown in the left figure Pin on 22 Position of pin on 22 Top View L 6 22 23 P 5 Pin on bottom of 23 23 21 C 1 C 4 ...

Page 83: ...on 44 First groove on 28 Align 25 and 28 as shown Bottom View 28 Pin of 34 Pin of 31 Position of Mode Lever when installed Pin of 35 Fig DM13 25 24 C 3 S 9 25 27 26 28 C 2 L 8 L 9 L 10 Refer to the Alignment Section Page 2 4 9 Fig DM14 31 30 29 L 11 P 6 32 33 Fig DM15 35 37 turn turn 38 39 40 36 P 8 P 7 turn Break belt 34 L 12 ...

Page 84: ...2 4 8 U27NPCASIADA Fig DM16 41 42 43 L 13 44 45 Slide Fig DM17 ...

Page 85: ...e mechanical or electrical parts Alignment points in Eject Position Alignment 1 Loading Arm SP and TU Assembly Install Loading Arm SP and TU Assembly so that their triangle marks point to each other as shown in Fig AL2 Alignment 2 Mode Gear Keeping the two triangles pointing at each other install the Loading Arm TU Assembly so that the last tooth of the gear meets the most inside teeth of the Mode...

Page 86: ...hassis Assembly Bottom View Lubricating Point B2 B35 B410 B411 B494 B567 L1053 B74 B10 L1191 B73 B9 B12 B492 B11 B571 B37 B126 L1466 B501 B8 B121 B426 B560 L1450 L1450 L1051 L1467 B553 Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 150 DECK EXPLODED VIEWS Deck Mechanism View 1 ...

Page 87: ...3 B570 B491 B565 L1151 B525 B592 B31 L1406 B148 B521 B520 B590 B564 B487 B573 B574 B499 B587 B508 B558 B557 B3 B417 B591 B522 B414 B416 Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 150 SANKOUL FG84M Yellow grease B513 B502 B569 A B C D Comparison Chart of Models and Marks Model Mark VR340 55 VR340 75 VR740 55 VR740 75 A B C D Deck Mechanism View 2 ...

Page 88: ...B555 B563 B300 B562 B482 B355 B354 B483 B425 L1321 B347 L1321 B361 B359 B529 B360 B514 B313 Some Ref Numbers are not in sequence Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 150 Deck Mechanism View 3 ...

Page 89: ...1 1 1 B410 9965 000 16648 PINCH ARM A ASSEMBLY 4 MK12 1 1 1 1 B411 9965 000 16649 PINCH SPRING MK12 1 1 1 1 B414 9965 000 17195 M BRAKE SP ASSEMBLY MK12 1 1 1 1 B416 9965 000 17196 M BRAKE TU ASSEMBLY MK12 1 1 1 1 B417 9965 000 17197 TENSION SPG 3002654 MK12 1 1 1 1 B425 9965 000 08457 LOCK LEVER SPRING MK10 1 1 1 1 B426 9965 000 08458 KICK PULLEY MK10 1 1 1 1 B482 9965 000 16653 CASSETTE PLATE MK...

Page 90: ...09 REEL TU D2 MK12 1 1 1 1 B587 9965 000 16674 TENSION LEVER ASSEMBLY MK12 1 1 1 1 B590 9965 000 16677 BRAKE ARM TU MK12 1 1 1 1 B591 9965 000 17210 BAND BRAKE TU MK12 1 1 1 1 B592 9965 000 17211 TG POST MK11 1 1 1 1 B593 9965 000 17332 CAM HOLDER F ASSEMBLY MK12 1 1 L1051 9965 000 05359 SCREW B TIGHT M2 6X6 PAN HEAD 1 1 1 1 L1053 9965 000 05375 SCREW S TIGHT M2 6X8 WASHER HEAD 1 1 1 1 L1151 9965 ...

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Philips VR340/55, Service Manual

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