Toshiba MV20FL4C Service Manual

Text of Toshiba MV20FL4C User Guide:

• Toshiba MV20FL4C, ELECTRICAL ADJUSTMENTS D2-6 4. PURITY AND CONVERGENCE ADJUSTMENTS NOTE 1. 2. 3. Turn the unit on and let it warm up for at least 30 minutes before performing the following adjustments. Place the CRT surface facing east or west to reduce the terrestrial magnetism. Turn ON the unit and demagnetize with a Degauss Coil. 4-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT) 1. 2. 3. 4. 5. 6. 7. 8. Tighten the screw for the magnet. Refer to the adjusted CRT for the position. (Refer to Fig. 4-1) If the deflection yoke and magnet are in one body, untighten the screw for the body. Receive the green r

• Toshiba MV20FL4C, SERVICING NOTICES ON CHECKING 6. AVOID AN X-RAY1. KEEP THE NOTICES 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. 3. USE THE DESIGNATED PARTS 5. TAKE CARE TO DEAL WITH THE CATHODE-RAY TUBE In the condition that an explosion-proof cathode- ray tube is set in this equipment, safety is secured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock. Take enough care to deal with i

• Toshiba MV20FL4C, GENERAL SPECIFICATIONS G-12 Remote Unit RC-DQ Control Glow in Dark Remocon Yes Format NEC Custom Code 40-BFh,44-BBh Power Source Voltage(D.C) 3V UM size x pcs UM-4 x 2 pcs Total Keys 44 Keys Keys Power Yes 1 Yes 2 Yes 3 Yes 4 Yes 5 Yes 6 Yes 7 Yes 8 Yes 9 Yes 0 Yes CH Up Yes CH Down Yes Volume Up Yes Volume Down Yes Input Select Yes Play Yes F.Fwd Yes Rew Yes Pause/Still Yes Stop Yes Rec/OTR Yes(2Keys) Eject Yes Counter Reset Yes Speed Yes Timer Rec Yes(2Keys) TV Monitor No Quick View Yes Program Yes Slow Yes Auto Tracking Yes Set/Tr

• DISASSEMBLY INSTRUCTIONS B1-2 1-5: DECK SHIELD PLATE (Refer to Fig. 1-5) 1. 2. 3. 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) 1. 2. 3. 4. 5. Remove the screw 1. Remove the Syscon PCB in the direction of arrow (A). Remove the 2 screws 2. Unlock the 2 supports 3. Remove the Jack Plate in the direction of arrow (B). Remove the 2 screws 1. Remove the screw 2. Remove the Deck

• 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 J351 HTJ-035-28A 1 2 3 4 5 6 7 NC H E H E H E J701_1 JPJ1187-010010 1 2 3 4 5 6 7 D793 SLR-342VCT32 REC/OTR D791 SLR-342VCT32 T-REC D792 SLR-342VCT32 POWER SW799 EVQ21505R CH DOWN SW795 EVQ21505R REC/OTR(OPEN) SW791 EVQ21505R STOP/EJECT SW792 EVQ21505R PLAY SW793 EVQ21505R FF/CUE(SKIP FF) SW794 EVQ21505R REW(SKIP REW) SW798 EVQ2

• Toshiba MV20FL4C, The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. NOTE: WAVEFORMS 17 16 200mV 20µs/div 200mV 20µs/div 23 200mV 2ms/div HIFI 22 200mV 2ms/div 0.5V 5µs/div 5V 0.1ms/div 51 53 52 20V 1ms/div TV POWER 0.5V 5ms/div 1V 10ms/div 5V 20µs/div 0.5V 20µs/div 57 55 56 54 DEFLECTION 20.0V 20µs/div 20.0V 20µs/div 59 60 CRT 20.0V 20µs/div58

• Toshiba MV20FL4C, WAVEFORMS The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. NOTE: REC/PB 0.5V 20µs/div REC/PB 100mV 0.5µs/div PB 100mV 5ms/div REC 20V 10µs/div 3 2 5 1 Y/C/AUDIO/CCD/ HEAD AMP REC/PB 2V 20µs/div 9 MICON PB 1V 2ms/div REC/PB 1V 10ms/div REC/PB 1V 50ns/div REC/PB 1V 10ms/div REC/PB 1V 0.5ms/div 12 10 11 6 7 REC/PB 1V 5ms/div 8 4 PB 0.5V 1ms/div 13 14 REC/PB 200mV 20ns/div REC/PB 0.5V 20µs/div IN/OUT CHROMA/IF 15 200mV 20µs/div

• Toshiba MV20FL4C, MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE Install the Torque Gauge (JG002F) and Adapter (JG002B) on the S Reel. Set to the Picture Search (Rewind) mode. (Refer to Fig.1-4) Then, confirm that it indicates 120~180gf•cm. 1. 2. NOTE Install the Torque Gauge on the reel disk firmly. Press the REW button to turn the reel disk. 1-5: CONFIRMATION OF REEL BRAKE TORQUE (S Reel Brake) (Refer to Fig. 1-4-B) Once set to the Fast Forward mode then set to the Stop mode. While, unplug the AC cord when the Pinch Roller Block is on the position of Fig. 1-4-A. Move the Idler Ass'y from the S Reel. Install the Torque Gauge

• Toshiba MV20FL4C, GENERAL SPECIFICATIONS G-13 Features Auto Head Cleaning Yes Auto Tracking Yes HQ (VHS Standard High Quality) Yes Auto Power On, Auto Play, Auto Rewind, Auto Eject Yes VIDEO PLUS+(SHOWVIEW,G-CODE) No Auto Clock Yes Forward / Reverse Picture Search Yes Reverse Slow No One Touch Playback No Auto CH Memory Yes Closed Caption Yes TV Auto Shut off Function Yes End Call No Index Search No SQPB No CATV Yes CM Skip(30sec x 6 Times) Yes Comb Filter Yes TV Monitor No Program Extend No Choke Coil No Energy

• Toshiba MV20FL4C, C P 4 0 0 3 CP4001 C P 1 0 0 4 TU601 C610 IC603 IC501 Q605 Q610 Q611 R669 L604 SW1001 W010 R668 W345 Q1013 W139 W057 W069 W153 W040 W864 D1003 C4201 W045 X1002 R1002 W144 W017 W148 D1014 W204 IC1099 W141 W046 X1001 W044 W065 R1009 R1013 W039 W049 W066 D4201 R1024 W206 W137 W136 W135 W134 W131 L1001 W132 W130 C1020 W016 W142 W146 R1079 W050 W043 W019 W018 W113 W105 R1010 W108 R1014 W152 W150 W151 C4211 D4206 R4239 L4205 C4206 C4212 W334 W060 W061 W161 W223 C312 R309 C314 L301 B301 C311 IC301 W321 IC35

• 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 D610 SB10-03A3 IC501 KIA7805API 5V REG. IC 123 IC603 KIA7809API 9V REG IC 123 HS501 763WAA0081 DANS LA NOMENCLATURE DES PIECES N’UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURITE ETANTLES PIECES REPAREES PAR UNATTENTION: DESCRIBED IN PARTS LIST ONLY CRITICAL FOR SAFETY,USE ONES ARESINCE THESE PARTS MARKED

• Toshiba MV20FL4C, ELECTRICAL ADJUSTMENTS D2-1 1. ADJUSTMENT PROCEDURE Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION 2. BASIC ADJUSTMENTS (VCR SECTION) 2-1: PG SHIFTER 1. 2. 3. 4. Connect CH-1 on the oscilloscope to TP1002 and CH-2 to TP4001. Playback the alignment tape. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. Press the VOL. DOWN button on the set and the channel button (3) on the remote control simultaneously until the indicator REC disappears. If the indicator REC disappears, adjustment is completed. (If the above adjustments doesn't work well:

• Toshiba MV20FL4C, B4-1 Masking Tape (Cotton Tape) DISASSEMBLY INSTRUCTIONS 4. REMOVAL IC Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage. (Refer to Fig. 4-1.) 1. Fig. 4-1 NOTE REMOVAL AND INSTALLATION OF FLAT PACKAGE IC Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it. NOTE Masking is carried out on all the parts located within 10 mm distance from IC leads. Blower type IC desoldering machine IC Heat the IC leads using a blower type IC desoldering machine. (Refer to Fig. 4-2.) 2. Fig. 4-2 NOTE Do not add the rot

• Toshiba MV20FL4C, SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key simultaneously. The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On. Set Key Remocon Key Operations VOL. (-) MIN 0 Releasing of V-CHIP PASSWORD. Horizontal position adjustment of OSD. NOTE: Also can be adjusted by using the Adjustment MENU. Refer to the "ELECTRICAL ADJUSTMENT" (OSD HORIZONTAL). VOL. (-) MIN

• Toshiba MV20FL4C, 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 TP403 TP404 B G R 11 6 8 10 9 175 V801 A51LSH196X01(O) Q406 2SD2499(LBOEC1) H.OUTPUT IC401 AN5522 V.OUTPUT IC 1234567 CP401 B05B-DVS 1 2 3 4 5 CP803A 51052-0500 1 2 3 4 5 CD803 2Y054501 CD802 CP82035A L402 ELH5L4113 D407 FMV-3FULF027-102 1 2 3 T401 5013001 12 3 45 L481 D8000012 800uH 1 2 3 4 5 6 7 8 9 GND ABL GND GND 8 E8 TER HEA E27 E12 B+ E180 S F AFC COL HV FB401 3221017R 1 10 11 2 3 4 5 6 7 8 9 R450 4.7 2W R436 12 1/2W R447 68 1/2W R448 1K 1W R452_1 2.2 1W R437 11W R402 0.56 2W R449 2.7K 7W R441 100K 1/4W +-1% R442 4.7K 1/4W +-1% R439 27K 1/4W +-1% R443 1

• Toshiba MV20FL4C, DISASSEMBLY INSTRUCTIONS B1-1 1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS 1-1: BACK CABINET (Refer to Fig. 1-1) 1. 2. 3. 4. Remove the 6 screws 1. Remove the 2 screws 2 which are used for holding the Back Cabinet. Remove the AC cord from the AC cord hook 3. Remove the Back Cabinet in the direction of arrow. 1-2: CRT PCB (Refer to Fig. 1-2) CAUTION: BEFORE REMOVING THE ANODE CAP, DISCHARGE ELECTRICITY BECAUSE IT CONTAINS HIGH VOLTAGE. BEFORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB, UNPLUG THE POWER CORD FROM THE AC SOURCE. 1. 2. 3. Fig. 1-2 1-3: TV/VCR BLOCK (Refer to Fig. 1-3) 1. 2. 3. 4. Remove the 2 screws

• Toshiba MV20FL4C, DISASSEMBLY INSTRUCTIONS B2-1 NOTE When you install the Tape Guide L, install as shown in the circle of Fig. 2-3-B. (Refer to Fig. 2-3-B) REC Lever Tape Guide L • The REC Lever is not installed on the Video Cassette Player. Fig. 2-3-B 2-4: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-4) 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 the screw (2). 1 (2) Top Bracket Top Bracket Main Chassis Main Chassis 2 1 (1) 2 Fig. 2-1 • Screw Torque: 5 ± 0.5kgf

• Toshiba MV20FL4C, DISASSEMBLY INSTRUCTIONS B2-4 Spring Position Fig. 2-13-B 2-14: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-14) Remove the screw 1. Remove the FE Head. 1. 2. FE Head • The FE Head is not installed on the Video Cassette Player. • Screw Torque: 4 ± 0.5kgf•cm Fig. 2-14 1 2-15: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-15) Unlock the support 1 and remove the AHC Ass'y. Remove the 3 screws 2. Remove the Cylinder Unit Ass'y. 1. 2. 3. When you install the Cylinder Unit Ass'y, tighten the screws from (1) to (3) in order while pulling the Ass'y

• Toshiba MV20FL4C, GENERAL SPECIFICATIONS G-8 Operating Humidity Less then 80% RH G-9 On Screen Menu Yes Display Menu Type Character Timer Rec Set Yes Channel Setup Yes TV/CATV Yes Auto CH Memory Yes Add/ Delete Yes Guide CH Set No TV Setup Yes V-chip Set No On/Off Timer Set Yes Picture Yes Audio Yes Sap On/Off Yes Auto Repeat On/Off Yes System Setup Yes Clock Set Yes (Calendar 12h) Language Yes Auto Clock On/Off Yes Standard Time Yes Daylight Saving Time Yes Commercial Advance No Marking On/Off No Blueback On/Off No Playback Auto/Manual No Unmarked Tape No Movie Adv

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