Tokai LT-VHS-36 Service Manual

14" color tv/vcr combination

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SERVICE MANUAL

Sec. 1: Main Section

I Specifications

I Preparation for Servicing

I Adjustment Procedures

I Schematic Diagrams

I CBA's

I Exploded views

I Parts List

14" COLOR TV/VCR COMBINATION

LT-VHS-36

Sec. 2: Deck Mechanism Section

I Standard Maintenance

I Alignment for Mechanism

I Disassembly/Assembly of Mechanism

I Alignment Procedures of Mechanism

I Deck Exploded Views

I Deck Parts List

PAL

SECAM

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Summary of Contents for Tokai LT-VHS-36

Page 1 I Alignment for Mechanism I Adjustment Procedures I Disassembly/Assembly of Mechanism I Schematic Diagrams I Alignment Procedures of Mechanism I CBA’s I Deck Exploded Views I Exploded views I Deck Parts List I Parts List 14" COLOR TV/VCR COMBINATION LT-VHS-36 SECAM...
Page 2: Table Of Contents
MAIN SECTION 14" COLOR TV/VCR COMBINATION LT-VHS-36 Sec. 1: Main Section I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBA’s I Exploded Views I Parts List TABLE OF CONTENTS Specifications ............... . . 1-1-1 Important Safety Precautions .
Page 3: Specifications
SPECIFICATIONS *ˆ M ode---------SP mode unless otherwise specified *Test input terminal <Except Tuner>-------------Video input (1Vp-p) Audio input (-10dB) <Tuner>-----------------------Ant. input (80dBµV) Video: 87.5% mod.(BG/DK), 80.0% mod.(I) Audio: 30kHz div (1kHz Sin) <DEFLECTION> Description Condition Unit Nominal Limit 1. Over Scan —...
Page 4 <AUDIO> All items are measured across 8Ω resistor at speaker output terminal. Description Condition Unit Nominal Limit 1. Audio Output Power (Max.) (R/P) 2. Audio S/N (W/LPF) (R/P) 3. Audio Distortion (W/LPF) (R/P) 4. Audio Freq. Response 200Hz (R/P) — 5.0/-10 (-20dB Ref.
Page 5: Important Safety Precautions
IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
Page 6 ing is performed that involves B+, horizontal de- earth ground. If a voltage reading in excess of 1.0V flection or high voltage. Correct operation of the is obtained, remove and reinsert the AC power X-radiation protection circuits also must be recon- plug in the opposite polarity and again measure firmed each time they are serviced.
Page 7 Precautions during Servicing H. When a power cord has been replaced, check that 5~6 kg of force in any direction will not loosen it. A. Parts identified by the ( ! ) symbol are critical for I. Also check areas surrounding repaired locations. safety.
Page 8 Safety Check after Servicing Examine the area surrounding the repaired location for Chassis or Secondary Conductor damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the Primary Circuit Terminals specified values in order to verify compliance with safety standards.
Page 9: Standard Notes For Servicing
STANDARD NOTES FOR SERVICING Circuit Board Indications How to Read the Values of the Rect- angular Type Chip Components 1. The output pin of the 3 pin Regulator ICs is indi- cated as shown: Example: (a) Resistor Top View Bottom View Input = 473 = 47 [kΩ] 2.
Page 10 1.2. Standard solder e. Soldering Iron Soldering Iron Use a pencil-type soldering iron (less than 30 Tweezers watts). Solder f. Solder Eutectic solder (Tin 63%, Lead 37%) is recom- mended. g. Soldering time Do not apply heat for more than 4 seconds. h.
Page 11 b. Affix the wire to a workbench or solid mounting point, as shown in Fig. S-1-5. Desoldering Braid c. Pull up on the wire as the solder melts so as to lift Flat Pack-IC the IC leads from the CBA contact pads, while heating the pins using a fine tip soldering iron or hot air blower.
Page 12 <Correct> Presolder Grounding Band 1MΩ Flat Pack-IC 1MΩ Conductive Sheet or Copper Plate Fig. S-1-7 Instructions for Handling Semiconductors Electrostatic breakdown of the semiconductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. Ground for Human Body Be sure to wear a grounding band (1MΩ) that is prop- erly grounded to remove any static electricity that may...
Page 13: Preparation For Servicing
PREPARATION FOR SERVICING How to Enter the Service Mode Adjustment Mode No need to use. Caution: 1 No need to use. 1. Optical sensors system are used for Tape Start and H. Shift adjustment mode: See adjust- End Sensor on this equipment. Read this page ment instructions page 1-6-4.
Page 14: Cabinet Disassembly Instructions
CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart REMOVAL REMOVE/ This flowchart indicates the disassembly steps for the *UNHOOK/ cabinet parts, and the CBA in order to gain access to LOC. PART Fig. UNLOCK/RELEASE/ Note item(s) to be serviced. When reassembling, follow the UNPLUG/ steps in reverse order.
Page 15 6. Removal of the Bottom Plate. 8. Removal of the Main CBA. Remove a screw (S-5). Then slide the Bottom Plate Remove four screws (S-9) and pull up the Main out front. CBA. 7. Removal of the Deck Unit. 9. Removal of the CRT. Remove seven screws (S-6), screw (S-7) and Remove four screws (S-10) and pull the CRT back- screw (S-8).
Page 16 (S-4) [4] Tray Chassis Unit (S-4) (S-4) (S-4) CL604 (S-6) (S-6) [6] Top Cover (S-6) [2] Power Unit and Tray Chassis Unit (S-6) [8] Deck Unit (S-9) (S-9) (S-9) (S-9) [10] Main CBA (S-3) (S-7) (S-8) (S-3) (S-3) Power Button [5] H.V./Power Supply CBA [7] Bottom Plate...
Page 17 (S-10) Anode Cap CRT CBA (S-10) (S-10) (S-10) [11] CRT Fig. 4 1-5-4 T6608DC...
Page 18 CRT CBA ANODE CN501B FOCUS SCREEN CN501 CN502 H.V./POWER SUPPLY CBA CN552 CL501A CN551 CN602 CN601 TO DEGAUSS COIL MAIN CBA CL403 CL302A CL401 CL301A CL402 CN201 CN151 CL603A CAPSTAN TO SPEAKER MOTOR CL604 TO TOP COVER CYLINDER ASSEMBLY ACE HEAD FE HEAD DECK UNIT ASSEMBLY...
Page 19: Electrical Adjustment Instructions
ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: "CBA" is abbreviation for "Circuit Board How to set up the option code Assembly." 1. Enter the Service mode. 2. Press the [STATUS] button on the remote control NOTE: unit. The option code appears on the display. Electrical adjustments are required after replacing 3.
Page 20 1. DC 105V (+B) Adjustment 2. H Adjustment Purpose: To obtain correct operation. Purpose: To get correct horizontal position and size of screen image. Symptom of Misadjustment: The picture is dark and unit does not operate correctly. Symptom of Misadjustment: Horizontal position and size of screen image may not be properly displayed.
Page 21 3. C-Trap Adjustment 4. SECAM Black Level Adjustment Purpose: To get minimum leakage of the color signal Purpose: To set Black Level of the SECAM signal R- carrier. Y/B-Y to Ref. level. Symptom of Misadjustment: If Black Level of the Symptom of Misadjustment: If C-Trap Adjustment is SECAM signal R-Y/B-Y is incorrect, the picture is blu- incorrect, stripes will appear on the screen.
Page 22 5. V. Size Adjustment 7. H. Shift Adjustment Purpose: To obtain correct vertical height of screen Purpose: To obtain correct horizontal position and image. size of screen image. Symptom of Misadjustment: If V. Size is incorrect, Symptom of Misadjustment: Horizontal position and vertical height of image on the screen may not be size of screen image may not be properly displayed.
Page 23 7. Press the [PROG+/PROG-] buttons until the hori- 9. White Balance Adjustment zontal line becomes white. Purpose: To mix red, green and blue beams correctly 8. To enter the CUT OFF (G) mode, press [2] button for pure white. on the remote control unit. Symptom of Misadjustment: White becomes bluish 9.
Page 24 10. Sub-Brightness Adjustment 11. Setting for CONTRAST, COLOR, TINT and SHARP Purpose: To get proper brightness. Data Values Symptom of Misadjustment: If Sub-Brightness is incorrect, proper brightness cannot be obtained by General adjusting the Brightness Control. 1. Enter the Service mode. (See page 1-6-1) 2.
Page 25 12. Focus Adjustment 13. Head Switching Position Adjustment Purpose: Set the optimum Focus. Purpose: Determine the Head Switching Position dur- ing Playback. Symptom of Misadjustment: If Focus Adjustment is incorrect, blurred images are shown on the display. Symptom of Misadjustment: May cause Head Switching Noise or Vertical Jitter in the picture.
Page 26: Block Diagrams
BLOCK DIAGRAMS Servo/System Control Block Diagram T6608BLS 1-7-1...
Page 27 Video Block Diagram T6608BLV 1-7-2...
Page 28 Audio Block Diagram T6608BLA 1-7-3...
Page 29 TV Block Diagram T6608BLT 1-7-4...
Page 30 CRT/H.V. Block Diagram T6608BLCRT 1-7-5...
Page 31 Power Supply Block Diagram T6608BLP 1-7-6...
Page 32: Mechanical Trouble Indicator
MECHANICAL TROUBLE INDICATOR 1, Each Malfunction Indication POWER SAFETY 1) POWER SAFETY 1 If the MONITOR is turned ON right after the Mechani- If P-SAFETY 1 port becomes continuously 2.5V or cal Malfunction occurs or POWER SAFETY/X-RAY is less for 120 msec. (4 times 40 msec. interval) when turned ON, display the following character to show MONITOR is ON, the unit shall be assumed to be Malfunction after the EJECT display.
Page 33 Mechanical Malfunction determination 4) Countermeasure for CASSETTE LOADING Mal- function 1) REEL Malfunction detection a) CASSETTE IN operating Malfunction Countermeasure for REEL and CAPSTAN motor If LD-SW does not go to SB position after a lapse rotation malfunction (Except CASSETTE LOAD- of 5 sec.
Page 34: Schematic Diagrams / Cba's And Test Points
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS Standard Notes Note: 1. Do not use the part number shown on these draw- Warning ings for ordering. The correct part number is shown in the parts list, and may be slightly different or Many electrical and mechanical parts in this chassis amended since these drawings were prepared.
Page 35 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown, first 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.
Page 36 Main 1/5 Schematic Diagram 1-8-3 1-8-4 T6608SCM1...
Page 37 Main 2/5 Schematic Diagram 1-8-5 1-8-6 T6608SCM2...
Page 38 Main 3/5 Schematic Diagram 1-8-7 1-8-8 T6608SCM3...
Page 39 Main 4/5 Schematic Diagram 1-8-9 1-8-10 T6608SCM4...
Page 40 Main 5/5 Schematic Diagram 1-8-11 1-8-12 T6608SCM5...
Page 41 H.V./Power Supply 1/2 Schematic Diagram CAUTION ! CAUTION Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, If Main Fuse (F601) 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.
Page 42 H.V./Power Supply 2/2 Schematic Diagram 1-8-15 1-8-16 T6608SCP2...
Page 43 CRT Schematic Diagram 1-8-17 1-8-18 T6608SCCRT...
Page 44 Main CBA Top View Sensor CBA Top View BHF300F01011-A TO SENSOR CBA (END-SENSOR) BHF300F01011-B J361G4 (SECAM Black Level Adjustment) TP007 N-A-PB TP002 RF-SW TP001 TP008 C-PB J349F3 (C-Trap Adjustment) TP003 V-OUT TO SENSOR CBA (START-SENSOR) 1-8-19 1-8-20 BT6600F01012...
Page 45 Main CBA Bottom View PIN 8 PIN 29 PIN 48 OF IC401 OF IC401 OF IC401 WF17 PIN 58 OF IC201 WF18 PIN 59 OF IC201 PIN 52 OF IC301 WF11 PIN 7 OF IC301 WF10 PIN 13 OF IC301 1-8-21 1-8-22 BT6600F01012...
Page 46 H.V./Power Supply CBA Top View CAUTION ! CAUTION BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
Page 47 H.V./Power Supply CBA Bottom View CAUTION ! CAUTION BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
Page 48 CRT CBA Top View CRT CBA Bottom View WF14 WF16 WF15 Q503 Q502 Q501 Collector Collector Collector 1-8-27 1-8-28 BT6600F01022-B...
Page 49 Junction-A CBA Top View Junction-A CBA Bottom View Junction-B CBA Top View Junction-B CBA Bottom View Junction-C CBA Top View Junction-C CBA Bottom View BT6600F01012 1-8-29 1-8-30...
Page 50: Waveforms
WAVEFORMS 1-9-1 Z13PWF...
Page 51: Wiring Diagram
WIRING DIAGRAM 1-10-1 T6608WI...
Page 52: System Control Timing Charts
SYSTEM CONTROL TIMING CHARTS Chart 1 EJECT ST-S "OFF" CASS.LOAD LD-FWD 0.2S LD-REV SFT-SW STOP(B) POWER LD-FWD 0.4S LD-FWD 0.2S LD-REV 0.2S LD-FWD 0.5S LD-REV STOP(A) PLAY LD-FWD PLAY LD-FWD RS1(RS2) LD-REV 0.2S LD-FWD FS1(FS2) PLAY PLAY PAUSE STILL PAUSE NOISE CANCEL PAUSE...
Page 53 Chart 2 STOP(A) STOP LD-REV 0.2S LD-FWD 0.2S STOP /EJECT 1.0S LD-FWD 0.5S LD-REV STOP(A) LD-REV 0.2S LD-FWD 0.2S STOP /EJECT LD-REV 1.0S LD-FWD 0.5S LD-REV STOP(A) LD-FWD PAUSE LD-FWD 2.5S Short REV LD-REV 0.2S LD-FWD REC PAUSE REC or PAUSE STOP /EJECT...
Page 54: Ic Pin Function Descriptions
IC PIN FUNCTION DESCRIPTIONS IC 201 (TV/VCR Micro Controller) Signal Function Name “H” ≥ 4.5V, “L” ≤ 1.0V SECAM-H SECAM Mode at High Signal Function Special Playback = “H” in Name 33 OUT TRICK-H SECAM Mode Not Used System Reset Signal RESET Power Supply Failure P-SAFETY 2...
Page 55 Signal Signal Function Function Name Name SLOW-SW-IN Slow Switch Input Signal AMPVcc AMPVcc A/D Converter Power Not Used AVcc Input/ Standard Voltage Tele Text Input Signal at Input 70 OUT TEXT-IN-H High Tuner IF Output Signal E2PROM/CHROMA IC 71 OUT SCL Tuner Communication Clock E2PROM/CHROMA IC...
Page 56: Lead Identifications
LEAD IDENTIFICATIONS MID-32A22F 2SK2647 PT204-6B-12 PS2561L1-1-VL PS2561L1-1-VW 2SC5884000RF 2SD1913(R) KTC2026Y TT2084LS-YB11 S: Souce TT2138LS-YB11 D: Drain G: Gate S D G B C E 2SA1015-GR(TPE2) 2SA1346 2SA1175(F) LA78040A 2SC1815-GR(TPE2) 2SA950(Y,O) 2SC2120-O(TPE2) 2SC1627Y-TPE2 2SC2120-Y(TPE2) 2SC2482 TPE6 2SC3331(T,U) 2SC2785(F,H,J) KRA103M 2SC3468(D,E)-AE KTA1266(GR) BN1F4M-T KTC3203(Y) KTA1267(GR)
Page 57: Exploded Views
EXPLODED VIEWS Cabinet CL604 H.V./Power SP151 Details for L551 Supply CBA and surrounding parts SHINWHA TAPE SGT-730 CL801 (BLACK) V501-2 SHINWHA TAPE SGT-730 V501-1 Junction B CBA (WHITE) L551 CRT CBA Junction C CBA V501-3 TB10 L551 Sensor CLN551 TB21 V501 Junction A CBA Main CBA...
Page 58 Packing X2-1 X2-2 X2-6 TAPE 1-14-3 T6608PEX...
Page 59: Mechanical Parts List
PRODUCT SAFETY NOTE: Products marked with a ! Ref. No. Description Part No. have special characteristics important to safety. Before X2-1! OWNER'S MANUAL LT-VHS-36:?EN? 1EMN20079 replacing any of these components, read carefully the X2-2! OWNER'S MANUAL LT-VHS-36:?FR? 1EMN20044 product safety notice in this service manual. Don't...
Page 60: Electrical Parts List
ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a ! Ref. No. Description Part No. have special characteristics important to safety. Before C205 CHIP CERAMIC CAP .(MELF) F Z 0.01µF/16V or CZM1CZB0F103 replacing any of these components, read carefully the CHIP CERAMIC CAP .(MELF) F Z 0.01µF/16V CZM1CZ30F103 product safety notice in this service manual.
Page 61 Ref. No. Description Part No. Ref. No. Description Part No. CHIP CERAMIC CAP . F Z 0.1µF/25V or CHD1EZB0F104 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V or CHD1JZ30F104 C316 ELECTROLYTIC CAP . 1µF/50V M or CE1JMASDL010 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104...
Page 62 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP . 220µF/10V M CE1AMASTL221 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V or CHD1JZ30F104 C401 CHIP CERAMIC CAP . B K 0.01µF/50V or CHD1JKB0B103 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103...
Page 63 Ref. No. Description Part No. Ref. No. Description Part No. CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 CHIP CERAMIC CAP .(MELF) SL J 33pF/50V CZM1JJ3SL330 C484 CHIP CERAMIC CAP . CH J 820pF/50V or CHD1JJBCH821 C860 PCB JUMPER D0.6-P5.0 JW5.0T CHIP CERAMIC CAP .
Page 64 Ref. No. Description Part No. Ref. No. Description Part No. D302 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 IC:ANALOG MULTIPLEXER CD4053BNSR NSZBA0TTY093 SWITCHING DIODE 1N4148 NDTZ001N4148 IC703! IC:SWITCH TC4053BF(N) or QSMBA0STS002 D303 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 IC:ANALOG MULTIPLEXERS CD4053BCSJX or NSZBA0TF3071 SWITCHING DIODE 1N4148 NDTZ001N4148 IC:ANALOG MULTIPLEXER CD4053BNSR...
Page 65 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR KTC3198(GR) or NQS40KTC3198 Q852 TRANSISTOR 2SC3331(T) or QSC3331TNPAA TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815 TRANSISTOR 2SC3331(U) or QSC3331UNPAA Q686! TRANSISTOR 2SD1913(R) or Q2SD1913R*** TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815 TRANSISTOR KTC2026Y NQWY0KTC2026 Q853 TRANSISTOR 2SC3331(T) or QSC3331TNPAA Q701 TRANSISTOR 2SC2785(F) or...
Page 66 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W J 2.2k Ω or CARBON RES. 1/4W J 47k Ω R216 RRXAJB5Z0222 R258 RCX4JATZ0473 CHIP RES.(1608) 1/10W J 2.2k Ω RRXAJR5Z0222 R259 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES.(1608) 1/10W J 2.7k Ω or CARBON RES.
Page 67 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W J 1.2k Ω or CHIP RES.(1608) 1/10W J 330 Ω or R307 RRXAJB5Z0122 R409 RRXAJB5Z0331 CHIP RES.(1608) 1/10W J 1.2k Ω CHIP RES.(1608) 1/10W J 330 Ω RRXAJR5Z0122 RRXAJR5Z0331 CHIP RES.(1608) 1/10W J 100 Ω...
Page 68 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W J 1k Ω or CHIP RES.(1608) 1/10W J 22k Ω or R707 RRXAJB5Z0102 R754 RRXAJB5Z0223 CHIP RES.(1608) 1/10W J 1k Ω CHIP RES.(1608) 1/10W J 22k Ω RRXAJR5Z0102 RRXAJR5Z0223 CHIP RES.(1608) 1/10W J 75 Ω...
Page 69 JUNCTION A CBA Ref. No. Description Part No. TACTILE SWITCH KSHG612BT SST0101HH027 Ref. No. Description Part No. SW204 TACT SWITCH SKQNAED010 or SST0101AL055 JUNCTION A CBA ---------- TACTILE SWITCH KSHG612BT SST0101HH027 Consists of the following SW205 TACT SWITCH SKQNAED010 or SST0101AL055 CONNECTOR TACTILE SWITCH KSHG612BT...
Page 70 Ref. No. Description Part No. Ref. No. Description Part No. METALLIZED FILM CAP . 0.0082µF/1.6KV J CT3C822F7004 ELECTROLYTIC CAP . 4.7µF/50V M CE1JMASTL4R7 C561 FILM CAP .(P) 0.01µF/50V J or CMA1JJS00103 C636 ELECTROLYTIC CAP . 100µF/10V M or CE1AMASDL101 FILM CAP .(P) 0.01µF/50V J CA1J103MS029 ELECTROLYTIC CAP .
Page 71 Ref. No. Description Part No. Ref. No. Description Part No. D622! SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR 2SC2785(H) or QQSH02SC2785 SWITCHING DIODE 1N4148 NDTZ001N4148 TRANSISTOR 2SC2785(J) or QQSJ02SC2785 D623! SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR KTC3199(GR) or NQS10KTC3199 SWITCHING DIODE 1N4148 NDTZ001N4148 TRANSISTOR KTC3198(GR) or NQS40KTC3198...
Page 72 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 2.2k Ω METAL OXIDE FILM RES. 2W J 10k Ω R594 RCX4JATZ0222 RN02103DP004 METAL OXIDE FILM RES. 2W J 10k Ω or R595 PCB JUMPER D0.6-P5.0 JW5.0T R659! RN02103ZU001...
Page 73 Ref. No. Description Part No. Q501 TRANSISTOR 2SC2482 TPE6 or QQSZ02SC2482 TRANSISTOR 2SC3468(E)-AE or QQSE02SC3468 TRANSISTOR 2SC3468(D)-AE or QQSD02SC3468 TRANSISTOR KTC3207 NQSZ0KTC3207 Q502 TRANSISTOR 2SC2482 TPE6 or QQSZ02SC2482 TRANSISTOR 2SC3468(E)-AE or QQSE02SC3468 TRANSISTOR 2SC3468(D)-AE or QQSD02SC3468 TRANSISTOR KTC3207 NQSZ0KTC3207 Q503 TRANSISTOR 2SC2482 TPE6 or QQSZ02SC2482 TRANSISTOR 2SC3468(E)-AE or...
Page 74 DECK MECHANISM SECTION 14" COLOR TV/VCR COMBINATION LT-VHS-36 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 TABLE OF CONTENTS Standard Maintenance ..............2-1-1 Service Fixture and Tools .
Page 75: Standard Maintenance
STANDARD MAINTENANCE Service Schedule of Components This maintenance chart shows you the standard of replacement and cleaning time for each part. Because those may replace depending on environment and purpose for use, use the chart for reference. h: Hours : Cleaning I: Replace Deck Periodic Service Schedule...
Page 76 Cleaning Cleaning of ACE Head Clean the head with a cotton swab. Cleaning of Video Head Procedure Clean the head with a head cleaning stick or chamois 1.Remove the top cabinet. cloth. 2.Dip the cotton swab in 90% isopropyl alcohol and Procedure clean the ACE Head.
Page 77: Service Fixture And Tools
SERVICE FIXTURE AND TOOLS J-1-1, J-1-2 Ref. No. Name Part No. Adjustment J-1-1 Alignment Tape FL6A Head Adjustment of ACE Head J-1-2 Alignment Tape FL6N8 Azimuth and X Value Adjustment of ACE Head / (2 Head model) Adjustment of Envelope Waveform FL6NS8 (4 Head model) Guide Roller Adj.
Page 78: Mechanical Alignment Procedures
MECHANICAL ALIGNMENT PROCEDURES Explanation of alignment for the tape to correctly run B. Method to place the Cassette Holder in the tape- starts on the next page. Refer to the information below loaded position without a cassette tape on this page if a tape gets stuck, for example, in the 1.
Page 79 1. Tape Interchangeability Alignment Note: To do these alignment procedures, make sure that the Tracking Control Circuit is set to the preset position every time a tape is loaded or unloaded. (Refer to page 2-3-4, procedure 1-C, step 2.) Equipment required: Dual Trace Oscilloscope VHS Alignment Tape (FL6N8) Guide Roller Adj.
Page 80 1-A. Preliminary/Final Checking and 4. If creasing or snaking is apparent, adjust the Tilt Alignment of Tape Path Adj. Screw of the ACE Head. (Fig. M6) Purpose: To make sure that the tape path is well stabilized. Azimuth Adj. Screw Symptom of Misalignment: If the tape path is unstable, the tape will be damaged.
Page 81 5. To shift the CTL waveform, press CH UP or CH 5. When Guide Rollers [2] and [3] (Refer to Fig. M3) DOWN button on the remote control unit. Then are aligned properly, there is no envelope drop make sure that the maximum output position of PB either at the beginning or end of track as shown in ±...
Page 82 1-D. Azimuth Alignment of Audio/Con- 2. When the tape has been curled up or bent, turn the trol/ Erase Head alignment screw to adjust the height of REV Post. (Refer to Fig. M11 and M13.) Purpose: To correct the Azimuth alignment so that the Audio/ Control/Erase Head meets tape tracks properly.
Page 83: Disassembly/Assembly Procedures Of Deck Mechanism
DISASSEMBLY/ASSEMBLY PROCEDURES OF DECK MECHANISM Before following the procedures described below, be sure to remove the deck assembly from the cabinet. (Refer to CABINET DISASSEMBLY INSTRUCTIONS on page 1-5-1 of Main Section.) All the following procedures, including those for adjustment and replacement of parts, should be done in Eject mode;...
Page 84 REMOVAL INSTALLATION STEP START- REMOVE/*UNHOOK/ /LOC. PART ADJUSTMENT Fig. No. UNLOCK/RELEASE/ CONDITION UNPLUG/DESOLDER Loading Arm (SP) (+)Refer to Alignment [32] [25] DM2, DM14 Assembly Sec.Page 2-5-1 Loading Arm (TU) (+)Refer to Alignment [32] [33] DM2, DM14 Assembly Sec.Page 2-5-1 [34] [2],[25] M Brake (TU) Assembly DM1, DM15 *(P-7), Brake Belt...
Page 85 Top View [41] [42] [43] [46] [14] [13] [11] [15] [36] [10] [12] [35] [34] [40] [29] [30] [16] [39] [38] Fig. DM1 Bottom View [20] [33] [32] [24] [26] [27] [25] [23] [28] [22] [21] [31] Fig. DM2 2-4-3 Z13PDA...
Page 86 (S-1) (S-1) (L-1) (L-3) (L-2) (S-1A) (P-1) Installation of [3] and [6] First, insert [6] diagonally in [3] as shown below. Then, install [6] in [3] while pushing (L-1) in a direction of arrow. After installing [6] in [3], confirm that pin A of [3] enters hole A of [6] properly.
Page 87 [11] (S-4A) (L-4) [46] (P-3) [13] [47] Removal of [11] [12] (L-14) 1) Remove screw (S-4A). 2) Unhook spring (P-2). [10] Release (L-4) while (P-2) holding [12] with a finger. Loosen a finger holding [12] and remove [11]. (S-2) Pin of [12] Pin of [10] Groove of [28] When reassembling [10] and...
Page 88 Installation of [13] and [12] (S-5) [14] (S-6) [16] [13] [15] Hook spring (P-3) up to [12] and [13], then install then to (P-3) the specified position so that [12] will be floated slightly while holding [12] and [13]. (Refer to Fig. A.) [12] Fig.
Page 89 [22] (S-8) (C-2) (C-1) [23] (L-6) [21] (P-5) [20] Cap Belt (P-5) [28] Installation position of Cap Belt [21] Cap Belt When installing [23], install the spring (P-5) to [28] as shown in the left figure, and then install [23] while Pin on pressing the spring (P-5) to bottom...
Page 90 (P-6) [25] (C-4) [31] Refer to the Alignment Section, Page 2-5-1. (S-9) [29] [33] [30] (L-11) (L-10) [32] (L-8) (C-3) [27] [28] [24] [26] (L-9) Fig. DM14 Fig. DM13-1 [36] Break belt Installation of [25] (P-7) [34] Position of Mode Lever when installed [40] Pin of [35] Pin of [31]...
Page 91 [42] [41] [43] (L-13) Fig. DM16 (P-9) [44] [45] Slide Fig. DM17 2-4-9 Z13PDA...
Page 92: Alignment Procedures Of Mechanism
ALIGNMENT PROCEDURES OF MECHANISM The following procedures describe how to align the Alignment 1 individual gears and levers that make up the tape load- Loading Arm (SP) and (TU) Assembly ing/unloading mechanism. Since information about the state of the mechanism is provided to the System Install Loading Arm (SP) and (TU) Assembly so Control Circuit only through the Mode Switch, it is that their triangle marks point to each other as...
Page 93: Deck Exploded Views
DECK EXPLODED VIEWS Deck Mechanism View 1 Mark Description Floil G-684G or Multemp MH-D (Blue grease) SLIDUS OIL #150 B494 L1467 L1191 B553 B411 B567 L1053 B410 L1051 Chassis Assembly Top View (Lubricating Point) B501 B560 L1450 L1450 B426 L1466 B121 B126 B492...
Page 94 Deck Mechanism View 2 Mark Description Floil G-684G or Multemp MH-D (Blue grease) B587 B521 B487 SLIDUS OIL #150 B416 B591 SANKOUL FG84M (Yellow grease) B520 B590 B522 L1406 B148 B499 B508 B592 B573 B574 B558 B564 B557 B414 B565 B525 L1151 B417...
Page 95 Deck Mechanism View 3 Mark Description Floil G-684G or Multemp MH-D (Blue grease) L1321 SLIDUS OIL #150 B347 L1321 B355 B354 B483 L1341 B425 B482 B562 B300 B563 B313 L1474 B529 B360 B359 B361 B555 B561 B303 Some Ref. Numbers are not in sequence. B514 2-6-3 Z13P2HDEX...
Page 96: Deck Parts List
DECK PARTS LIST NOTE: Ref. No. Description Part No. Five different, but interchangeable, types of B558 PINCH ARM(A) ASSEMBLY(5) MK12 0VSA13788 (LOADING MOTOR) may be installed in these models. B411 PINCH SPRING MK12 0VM414644 Please confirm B558 (LOADING MOTOR) type by a B414 M BRAKE(SP) ASSEMBLY MK12.5 0VSA14994...
Page 97 Ref. No. Description Part No. L1151 SCREW, SEMS M3X4 PAN HEAD + or CPM33040 SCREW, SEMS M2.6X4 PAN HEAD+ CPM39040 L1191 SCREW, S-TIGHT M2.6X8 WASHER HEAD+ GCMS9080 L1321 SCREW, S-TIGHT M3X6 BIND HEAD+ GBMS3060 L1341 SCREW, P-TIGHT M2X6 PAN HEAD+ GPMP2060 L1406 AC HEAD SCREW MK9...
Page 98 LT-VHS-36 T6608FJ 2004-06-03...