Memorex MVR4040A Service Manual

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[Page 1] Memorex MVR-4040A

SERVICE MANUAL Design and specifications are subject to change without notice. MVR4040A ORIGINAL MFR’S VERSION A VIDEO CASSETTE RECORDER ...

[Page 2] Memorex MVR-4040A

SERVICING NOTICES ON CHECKING As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. PERFORM A SAFETY CHEC...

[Page 3] Memorex MVR-4040A

CONTENTS A2-1 SERVICING NOTICES ON CHECKING ......................................................................................................... HOW TO ORDER PARTS.....................................................................................

[Page 4] Memorex MVR-4040A

GENERAL SPECIFICATIONS A3-1 G-1. Outline of the Product 3 -Speed 1/2" Video Cassette Recorder G-2. VCR Format VHS Standard NTSC PAL SECAM PAL-M PAL-N VHS Hi-Fi Audio System G-3. Video Recording System : Rotary,slant azimuth t...

[Page 5] Memorex MVR-4040A

GENERAL SPECIFICATIONS A3-2 G-16.Tuner and Receiving Channel Tuner: Contactless Electric Tuner Oscar(W/O HYPER) Oscar(W/ HYPER) France CATV Others Receiving Channel VHF (LOW) 2 ch ~ 6 ch (HIGH) 7 ch ~ 13 ch (CATV) A5 ch ~...

[Page 6] Memorex MVR-4040A

GENERAL SPECIFICATIONS A3-3 G-26.Power Source 120 V AC 50Hz AC 60Hz G-27.Power Consumption: 12 W at AC 120 V 60 Hz(Approx.) Stand by: 2.5 W at AC 120 V 60 Hz(Approx.) Per...

[Page 7] Memorex MVR-4040A

GENERAL SPECIFICATIONS A3-4 G-41.Display Fluorescent Indicator Yes No Clock/Counter,Channel,Timer Rec,OTR,Play,Rec,FF(Cue),Rew(Rev), Still,Pause,ATR,Eject,Stop WKL,Y.M.D,Start,End AFT Repeat VCR Memory Index VPS PDC SP LP SLP AM PM On Screen D...

[Page 8] Memorex MVR-4040A

GENERAL SPECIFICATIONS A3-5 G-44.Accessories Owner's Manual ( W/Guarantee Card) [English/Spanish] Remote Control Unit Dew Caution Sheet Video Cassette Tape Battery (UM- 4 x 2 ) Safety Tip Toll Free Insert Sheet Guarantee Card Audio-Video C...

[Page 9] Memorex MVR-4040A

GENERAL SPECIFICATIONS A3-6 G-47.Remote Control Unit :RC-CA Glow in Dark Remocon Yes No Power Source: D.C 3 V Battery UM - 4 x 2 Control Key :Total 43 Key 0 Ch Up Power 1 Ch Down Eject 2 Cancel/Ch Skip Play 3 Cancel Play/Up 4 E...

[Page 10] Memorex MVR-4040A

DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS 1-1: TOP CABINET, FRONT CABINET AND OPERATION PCB (Refer to Fig. 1-1) 1. 2. 3. 4. 5. 6. Remove the 4 screws 1. Remove the Top Cabinet in the direction of arrow (A). Disconnect th...

[Page 11] Memorex MVR-4040A

DISASSEMBLY INSTRUCTIONS 2. REMOVAL OF DECK PARTS 2-1: TOP BRACKET (Refer to Fig. 2-1) Remove the 2 screws 1. Slide the 2 supports 2 and remove the Top Bracket. 1. 2. NOTE When you install the Top Bracket, install the screw (1) first, then install th...

[Page 12] Memorex MVR-4040A

DISASSEMBLY INSTRUCTIONS 2-6: LINK ASS'Y (Refer to Fig. 2-6) Set the Link Ass'y to the Eject position. Remove the (A) side of the Link Ass'y first, then remove the (B) side. 1. 2. Main Chassis (A) Main Chassis Link Ass'y Fig. 2-6 ...

[Page 13] Memorex MVR-4040A

DISASSEMBLY INSTRUCTIONS 2-11: S REEL/T REEL (Refer to Fig. 2-11) Remove the S Reel and T Reel. Remove the 2 Polyslider Washers 1. 1. 2. NOTE Do not touch the Pinch Roller. (Use gloves.) When you install the Pinch Roller Block, install as shown in th...

[Page 14] Memorex MVR-4040A

DISASSEMBLY INSTRUCTIONS 1 2 E-Ring Middle Gear Main Cam Pinch Roller Cam Joint Gear P5 Cam Fig. 2-17-A NOTE When you install the Pinch Roller Cam, P5 Cam and Main Cam, align each marker. (Refer to Fig. 2-17-B) Pinch Roller Cam P5 Cam Main Cam Marker...

[Page 15] Memorex MVR-4040A

DISASSEMBLY INSTRUCTIONS 2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 1. 2. 3. 4. 5. 6. 7. 8. 9. 1 2 3 Capstan Brake Spring Capstan Brake Ass'y Main Rod Main Loading Gear Tension Lever Loading Gear T Loading Gear Spring Loading Arm T...

[Page 16] Memorex MVR-4040A

KEY TO ABBREVIATIONS A B C D E F G H A/C ACC AE AFC AFT AFT DET AGC AMP ANT A.PB APC ASS'Y AT AUTO A/V BGP BOT BPF BRAKE SOL BUFF B/W C CASE CAP CARR CH CLK CLOCK (SY-SE) COMB CONV CPM CTL CYL CYL-M CYL SENS DATA (SY-CE) dB DC DD Unit DEMOD DET ...

[Page 17] Memorex MVR-4040A

KEY TO ABBREVIATIONS S T U V X Y SYNC SYNC SEP TR TRAC TRICK PB TP UNREG V VCO VIF VP V.PB VR V.REC VSF VSR VSS V-SYNC VT X'TAL Y/C : : : : : : : : : : : : : : : : : : : : : Synchronization Sync Separator, Separation Transistor Tracking Trick Pl...

[Page 18] Memorex MVR-4040A

SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. C2-1 Method Operations Press both PLAY button and CH UP button on the set for more than 2 seconds. PLAY/REC total hours are displayed ...

[Page 19] Memorex MVR-4040A

PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on ot...

[Page 20] Memorex MVR-4040A

C3-2 PREVENTIVE CHECKS AND SERVICE INTERVALS CLEANING NOTE After cleaning the heads with isopropyl alcohol, do not run a tape until the heads dry completely. If the heads are not completely dry and alcohol gets on the tape, damage may occur. 1. AUDIO...

[Page 21] Memorex MVR-4040A

C4-1 NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. DATA ADDRESS INI 00 ...

[Page 22] Memorex MVR-4040A

(For 2 heads model) VHS Alignment Tape JG001 JG001A JG001Q JG001T SERVICING FIXTURES AND TOOLS JG100A Torque Tape (VHT-063) JG024AJG022 Master PlaneJG153 X Value Adjustment Screwdriver JG005 Post Adjustment Screwdriver Part No. SV-TG0-030-000 ...

[Page 23] Memorex MVR-4040A

MECHANICAL ADJUSTMENTS 1. CONFIRMATION AND ADJUSTMENT Read the following NOTES before starting work. • • Place an object which weighs between 450g~500g on the Cassette Tape to keep it steady when you want to make the tape run without the Cassette...

[Page 24] Memorex MVR-4040A

MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE Operate within 4~5 seconds after the reel disk begins to turn. Install the Torque Gauge (JG002F) and Adapter (JG002B) on the S Reel. Set to the Rewind mode. (Refer to Fig.1-4) Then, confirm that ...

[Page 25] Memorex MVR-4040A

MECHANICAL ADJUSTMENTS 2-3:2-2: When the Tape Running Mechanism does not work well, adjust the following items. CONFIRMATION AND ADJUSTMENT OF AUDIO/ CONTROL HEAD 1. 2. 3. 4. When the height is not correct, turn the screw 3 to adjust the height. Then...

[Page 26] Memorex MVR-4040A

MECHANICAL ADJUSTMENTS 3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 5 6 7 8 9 10 1 2 3 4 1. Tension Adjust 2. Tension Arm 3. Guide Roller 4. P1 Post 5. Audio/Control Head 6. 7. 8. 9. 10. X value adjustment driver hole P4 Post T Brake Spring T Reel S ...

[Page 27] Memorex MVR-4040A

ELECTRICAL ADJUSTMENTS 1-1: PG SHIFTER Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies. D2-1 1. BASIC ADJUSTMENT CAUTION When replacing IC's or transistors, use only specified silicon ...

[Page 28] Memorex MVR-4040A

D2-2 2. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE SYSCON PCB TU6001 T501 ELECTRICAL ADJUSTMENTS J4201 TP1002 TP4001 J4203 TP1001 TP4201 ...

[Page 29] Memorex MVR-4040A

Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM E-1 E-2 X4001 3.579545MHz 40 100 98 97 25 42 96 28 85 83 82 5 7 46 4 6 44 59 55 30 19 14 13 93 2 1 3 78 76 H.AMP SW REC AMP CP4001 6 5 4 SP-CH1 (R) SP COM SP-CH2 (L) CYL FE HEAD (HOT) FE HEAD (GND) 2 1 CP4003 FE H...

[Page 30] Memorex MVR-4040A

TIMER SYSCON SERVO CONTROLLER IC1001 OEC0080A Y/C/AUDIO/ CCD/HEAD AMP POWER ON L DRUM PWM MS SEN-B POWER FAIL-H TRICK PB-H KEY-B KEY-A DUMMY V.SYNC C.ROTARY SP/LP/EP-H 81 8 26 6 89 1 9 28 24 27 SYSTEM CONTROL/SERVO BLOCK DIAGRAM KEY-A OPERATION POWE...

[Page 31] Memorex MVR-4040A

TUNER BLOCK DIAGRAM 2 RF-SW SW6001 TU6001 3 5 FRONT_A_IN_L AUDIO_OUT_R REAR OUT JACK J4201 2 Q4201 BUFFER VIDEO_OUT 23 24 SYSCON/ SERVO HIFI 2 22 RF_CONV_A.OUT 3 6 12 11 AUDIO_OUT_L TV/VCR SYSCON/SERVO 16 P.CON+12V HIFI FRONT JACK J4203 2 4 FRONT_V_I...

[Page 32] Memorex MVR-4040A

HIFI BLOCK DIAGRAM HIFI AUDIO/H.AMP/DEM IC5501 AN3662FBP 57 9 15 53 27 42 10 14 29 30 59 36 48 56 43 28 24 21 22 45 62 61 AUDIO_OUT_L HIFI_H.SW RF_CONV_A.OUT TUNER_A AUDIO_MUTE-H V. REC_ST-H HIFI_ENV. DET IIC_CLK IIC_DATA AUDIO_OUT_R ST_SELECT FRONT_...

[Page 33] Memorex MVR-4040A

OPERATION BLOCK DIAGRAM KEY-A KEY-B POWER BLOCK DIAGRAM STOP/EJECT REC/OTR PLAY FF/CUE REW/REV KEY A KEY B 1 2 POWER 1 3 OS651 REM_IN AT+5V CP601 CP651 SYSCON/ SERVO TU_P.CON+5V P.CON+5V P.CON+12V +32V Q502 Q511 Q503 Q510 POWER_FAIL(AC) SYSCON/ SERV...

[Page 34] Memorex MVR-4040A

RISK OF FIRE-REPLACE AS MARKED. 1.6A250V IC1002 C P 1 00 2 TU6001 SW6001 Q1002 Q1001 SW1001 CP4001 CP1003 Q1005 Q1004 CP4003 CP4002 D4205 IC1099 D1002 D1004 C6008 CP1001 OS651 W133 W810 J4201 W025 W020 FH502 FH501 C512 R513 L501 R534 C504 C509 D507 ...

[Page 35] Memorex MVR-4040A

17 33 49 1 1 31 51 81 1 31 51 81 1 12 23 34 C1002 C1003 R1007 R6005 C6001 C1024 C6013 R4209 C6009 R6009 R506 R510 R516 C515 R518 IC5501 C5544 C5543 R5510 R5520 R5517 C5530 R5514 R5516 R5508R5507 IC4001 IC1001 R4204 R4205 R4043 C4013C4012 C4015C4014 R...

[Page 36] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 RECORD COLOR SIGNAL RECORD LUMINANCE SIGNAL PLAYBACK COLOR SIGNAL PLAYBACK LUMINANCE SIGNAL AUDIO SIGNAL(PB) AUDIO SIGNAL(REC) L4005 47uH 0305 L4008 100uH0305 L4001 100uH 0305 L4002 100uH 0305...

[Page 37] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 CAPSTAN AFC SIGNAL CYLINDER AFC SIGNAL CYLINDER APC SIGNAL CAUTION: DIGITAL TRANSISTOR D1008 RB721Q D1007 1SS133 D1002 1N4005E D1004 1N4005E CP1003 52045-0445 1 2 3 4 Q1007 DTC124EKA CENT SW D...

[Page 38] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 CAUTION: DIGITAL TRANSISTOR SW6001 SSAB110100 RF-SW 123 45 HHH E J4201 JPJ4311-011432 REAR OUT JACK 1 234 TU6001 TMDH2-020A 10 11 12 13 14 15 16 17 18 2 21 22 23 24 25 26 27 28 3 4 5 6 8 9 NC ...

[Page 39] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 FH501 EYF-52BC FH502 EYF-52BC L501 0R3A433F20 12 34 TYPE 1.6A 250V (F501). (F501). CAUTION: ATTENTION: D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME POUR UNEPROTECTION CONTINUE LES RISQUES R...

[Page 40] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 Vout B+ GND OS651 PIC26043LO 1 2 3 SW607 SKQNAED010 REW/REV SW605 SKQNAED010 FF/CUE SW608 SKQNAED010 POWER SW606_4 SKQNAED010 PLAY SW604_4 SKQNAED010 REC/OTR SW603_4 SKQNAED010 STOP/EJECT SW66...

[Page 41] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 IC5501 AN3662FBP HIFI AUDIO/H.AMP/DEM 1 1011121314 15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 3 30 31 32 33343536373839 4 404142434445464748 49 5 50515253545556575859 6 6061626364 789 D550...

[Page 42] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 CP101 52044-0445 1 2 3 4 Q101 RPT-38PB113 BOT SENSOR S105 S106 S103 S104S101 S102 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DURING ...

[Page 43] Memorex MVR-4040A

ABC D E F GH ABC D E F GH 2 1 3 4 5 6 7 8 2 1 3 4 5 6 7 8 BLADE WIDE BLACK WHITE 21 CD501 AC120V_60Hz TU6001 10 11 12 13 14 15 16 17 18 2 21 22 23 24 25 26 27 28 3 4 5 6 8 9 9 8 7 6 4 5 3 2 1 CP4001 6 5 4 3 2 1 6 5 4 3 2 1 2 1 CP4003 8 7 6 5 4 3 2 1 ...

[Page 44] Memorex MVR-4040A

H-1 12 PB 1V 0.2s/div 7PB 1V 0.2ms/div The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. NOTE: SYSCON/SERVO 3PB 200mV 1ms/div 8PB 1V 0.5ms/div 13 PB 1V 0.2s/div Y/C/AUDIO/CCD...

[Page 45] Memorex MVR-4040A

WAVEFORMS 16 PB 1V 5ms/div HIFI H-2 ...

[Page 46] Memorex MVR-4040A

MECHANICAL EXPLODED VIEW I-1 618 702 702 702 702 619 620 621 705 703 703 703 704 PCB010 (SYSCON PCB ASS'Y) TU6001 J4201 T501 611 612 614 613 616 617 609 PCB270 (OPERATION PCB ASS'Y) 606 603 608 602 615 601 605 604 608 607 701 701 610 ...

[Page 47] Memorex MVR-4040A

I-2 CHASSIS EXPLODED VIEW (TOP VIEW) 505 UN4001 334 321 348 507 H5001 506 305 304 301 347 316 313 508 315 338 512 310 361 359 368 357 366 351 364 306 366 358 365 351 363 323 324 362 353 320 369 M2003 505 505 515 335 319 349 318 336 328 512 314 508 31...

[Page 48] Memorex MVR-4040A

CHASSIS EXPLODED VIEW (BOTTOM VIEW) I-3 AB 302 M2001 511 340 514 341 343 511 503 345 339 342 504 332 346 311 333 346 312 331 514 344 AA AA AA AD AD AA AA AA AA AA AC AA 510 307 354 326 327 322 513 350 308 337 AA 325 AD AA AD NOTE: Applying positions ...

[Page 49] Memorex MVR-4040A

MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION 601 A4C934B720 CABINET,FRONT ASS'Y 602 701WPJ0886 CABINET,FRONT 603 711WPA0107 PLATE,DISPLAY 604 712WPJA324 FLAP 605 743WKAA001 SPRING,FLAP 606 735WPDA182 BUTTON DECK 607 735WPA0377...

[Page 50] Memorex MVR-4040A

CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION 300 A4C931B420A DECK ASS'Y A4C931B420A 501 8107126A04 SCREW,TAP TITE(S) PAN 2.6x10 502 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 301 85OA500022 AHC ASS&apos...

[Page 51] Memorex MVR-4040A

ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS TRANSISTORS ! R502 R03102335J RC 3.3M OHM 1/2W Q1006 0000100380 PHOTO TRANSISTOR PNA2604M010R ! R508 R655U4331J R,FUSE 330 OHM 1/4W Q1007 TNYJ...

[Page 52] Memorex MVR-4040A

ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS FH501 06710T0006 HOLDER,FUSE EYF-52BC FH502 06710T0006 HOLDER,FUSE EYF-52BC OS651 077Q000018 REMOTE RECEIVER PIC26043LO TM601 07660CA010 TRANSMITTER SBER20169A ! TU6001 0...

[Page 53] Memorex MVR-4040A

O/R NO. SPEC.NO. M4C9-34B B994002 ...

[Page 54] Memorex MVR-4040A

SERVICE MANUAL MVR4040A VIDEO CASSETTE RECORDER B A MFR’S VERSION LA71077AM-MPB IC4001 REVISION 1 MFR’S VERSION B Please file this revision with the original version. LA71077BM-MPB ...

[Page 55] Memorex MVR-4040A

DIFFERENCES Alteration of IC. MFR'S VERSION A MFR'S VERSION B REF.NO. PART NO. DESCRIPTION PART NO. DESCRIPTION IC4001 I03F310770 IC LA71077AM-MPB I03F31077B IC LA71077BM-MPB R4041 R801R7102J RC 1K OHM 1/10W R4051 R903N8273J ...