Sony Trinitron KV-21V4A Service Manual
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Sony Trinitron KV-21V4A Service Manual

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SERVICE MANUAL
MODEL
KV-21V4A
KV-21V4B
KV-21V4D
Note :
1. Refer to the Service Manual of VHS MECHANICAL ADJUSTMENTS
IV for MECHANICAL ADJUSTMENTS.
VHS Mechanical Adjustments IV
9-973-623-01
Part No.
M I C R O F I L M
*Please file according to model size. ........
21
COMMANDER DEST. CHASSIS NO.
RM-C801
Italian
SCC-J09F-A
RM-C803
French
SCC-J10D-A
RM-C801
AEP
SCC-J11D-A
MODEL
KV-21V4E
KV-21V4U
TRINITRON
COLOUR VIDEO TV
®
TE-1
CHASSIS
COMMANDER DEST. CHASSIS NO.
RM-C801
Spanish
SCC-J12D-A
RM-C802
UK
SCC-J14D-A

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Summary of Contents for Sony Trinitron KV-21V4A

  • Page 1 SERVICE MANUAL TE-1 CHASSIS MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO. KV-21V4A KV-21V4E RM-C801 Italian SCC-J09F-A RM-C801 Spanish SCC-J12D-A KV-21V4U KV-21V4B RM-C802 SCC-J14D-A RM-C803 French SCC-J10D-A KV-21V4D RM-C801 SCC-J11D-A Note : 1. Refer to the Service Manual of VHS MECHANICAL ADJUSTMENTS IV for MECHANICAL ADJUSTMENTS.

  • Page 2: General

    SPECIFICATIONS TV Section Inputs and Outputs Television system See “Receivable channels” Inputs LINE IN VIDEO : phono jack (1) Colour system See “Receivable channels” 1Vp-p, 75 ohms, unbalanced, Channel coverage See “Receivable channels” sync negative Picture tube Trinitron LINE IN AUDIO : phono jack (1) Approx.

  • Page 3: Table Of Contents

    CRITIQUE POUR LA SÉCURITÉ DU FONCTIONNEMENT. NE LES APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE NUMÉRO DE PIÉCE EST INDIQUÉ DANS LE PRÉSENT MANUEL OU CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS DANS DES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 23: Disassembly

    SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-3. A BOARD REMOVAL 2 Rear cover 1 Remove the claw in the direction of arrow and release the board lock. 1 Two screws (+BVTP 4 Claw VTR block assy Guide rail (right) Guide rail (left) 1 Two screws (+BVTP 4...

  • Page 24: Picture Tube Removal

    2-5. PICTURE TUBE REMOVAL ! DGC band @ Degaussing coil 6 VTR block assy 1 Two screw (BVTP 4 # Tension spring 2 Speaker (8CM) 7 C board 9 Four tapping screws (5) 8 Deflection yoke 3 Anode cap 5 F board Cushion 4 AC CORD LOCK (SC) 0 Picture tube...
  • Page 25 • REMOVAL OF ANODE-CAP NOTE : Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on the CRT, after removing the anode. • REMOVING PROCEDURES • HOW TO HANDLE AN ANODE-CAP @ Don't hurt the surface of anode-caps with sharp shaped material! A Don't press the rubber hardly not to hurt...

  • Page 26: Set-Up Adjustments

    SECTION 3 SET-UP ADJUSTMENTS • The following adjustments should be made when a complete Perform the adjustments in the following order: realignment is required or a new picture tube is installed. 1. Beam Landing • These adjustments should be performed with the rated 2.

  • Page 27: Convergence

    3-2. CONVERGENCE 2. When the V.STAT magnet is moved in the direction of arrows, the Red, Green and Blue Preparation: dots move as shown below. • Before starting, perform FOCUS, H.SIZE, and V.SIZE adjustments. • Set the BRIGHTNESS control to minimum. •...
  • Page 28 (2) Dynamic Convergence Adjustment Preparation: • Before starting to perform the Horizontal and Vertical 3. Move the deflection yoke for best convergence as shown static convergence adjustment. below. 1. Slightly loosen the deflection yoke screw. 4. Tighten the deflection yoke screw. 2.

  • Page 29: Screen (G2), Drive, White Balance, Sub Color And Sub Brightness

    3-3. SCREEN (G2), DRIVE, WHITE BALANCE, Sub Color Adjustment SUB COLOR and SUB BRIGHTNESS. 1. Input a PAL color bar pattern from the pattern generator. 2. Connect an oscilloscope to Pin 5 of J701 (B OUT) on the C Board. 3.

  • Page 30: Circuit Adjustments

    SECTION 4 CIRCUIT ADJUSTMENTS 4-1. ELECTRICAL ADJUSTMENTS Service adjustment to this model can be performed SERVICE with the supplied Remote Control Commander RM-C801, C802, C803. DISP DATA HOW TO ENTER INTO SERVICE MODE Range of adjustments available from the on screen menu system.
  • Page 31 VERT, AMPL PLL ADJUSTMENT ( ALL DESTINATIONS) 1. Input a 38.9MHz 100dBµ CW signal at the IF Out injection point. 2. Connect a digital voltmeter to IC101 pin 23 . 3. Adjust T101 AFT for 2.5V ±0.3V dc. V, LINEAR TU AGC ADJUSTMENT (ALL DESTINATIONS) 1.
  • Page 44 SECTION 2 CIRCUIT ADJUSTMENTS [ Set-up for adjustment ] Necessary items and indications for total adjustment of electric circuit of this unit will be described in this chapter. The video signal from the pattern generator is used as adjustment signal for electrical adjustment. This video signal should meet [ Instruments to be Used ] the requirement.

  • Page 45: Yc Board

    [ Specified Input/Output Level Impedance ] 2-1. MA BOARD ADJUSTMENT Input/Output terminal RV301 RV502 Video input Pin jack Input signal : 1Vp-p, 75Ω, unbalanced AUDIO SWITCHING POSITION L005 BIAS Sync negative REC BELL 2 REC C SECAM VIDEO LINE OUT Pin jack IC501 RV001 BELL 1...
  • Page 46 2-2. SERVO SYSTEM ADJUSTMENT [ Adjustment Spquences ] Switching position adjustment (MA board) 1) ACE head adjustment ... See “ VHS MECHANICAL ADJUSTMENTMANUAL Mode Playback MANUAL ”. Siganl Alignment tape, Stair step 2) Playback output level check. CH : Pin of CN802 (MA) Measurement Point CH : Pin...
  • Page 47 B MODEL ONLY ADJUSTMENT 2-5. SECAM SYNC GATE ADJUSTMENT 2-8. SECAM REC CHROMA ADJUSTMENT (EE Mode) (EE Mode) 1) Input the SECAM COLOUR BAR (2Vp-p). 1) Input the SECAM COLOUR BAR (2Vp-p). 2) Connect Oscilloscope to JL307 and JL033. 2) Connect Oscilloscope to JL303. 3) Adjust for 1.0 ±...
  • Page 48 3-1. SYSTEM CONTROL-VIDEO BLOCK INTERFACE (MA BOARD IC501) TAPE TAPE PB · PICTURE SEARCH REC · Signal Pin No. STOP THREADING UNTHREADING PAUSE SLOW REVIEW PAUSE V·PB IC501 RF SW P (SW25) IC501 Q VD/V MUTE IC501 NA·SP IC501 IC501 REC·P IC501 IC501...
  • Page 49 3-2. SYSTEM CONTROL-SERVO PERIPHERAL CIRCUIT INTERFACE (MA BOARD IC501) TAPE TAPE PB · PICTURE SEARCH REC · PB INDEX Signal Pin No. STOP THREADING UNTHREADING PAUSE SLOW REVIEW PAUSE WRT/ERS REC CTL IC501 HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z...
  • Page 50 3-3. SYSTEM CONTROL-MECHANISM BLOCK INTERFACE (MA BOARD IC501) CASSETTE CASSETTE TAPE TAPE PB · PICTURE SEARCH REC · Signal Pin No. I/O EJECTEDLOADING UNLOADING THREADING UNTHREADING STOP PAUSE SLOW REVIEW PAUSE CAM LOAD IC501 CAM UNLOAD IC501 CAM 12V IC501 MODE 1 IC501 MODE 2...
  • Page 51 3-4. SYSTEM CONTROL-SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA BOARD IC501) Signal Pin No. I/O Level ASURA RESET IC501 Normally “H”.“L” when service interruption is detected or restored. ASURA CS IC501 Chip select signal from the timer microprocessor.V period “L” pulse. SI BUS IC501 Serial communication data from the timer microprocessor.V period “L”...

  • Page 52: C, F2, H3, H4 Boards

    3-7. SERVO/SYSTEM CONTROL MICROPROCESSOR (MA BOARD IC501) PORT FUNCTION DESCRIPTION Pin No. Signal Function Pin No. Signal Function RF SWP RF switching pulse. H : PAL (Not used. (open)) False VD. FULL ERS Full erase control. (Not used. (open)) QHD ENBL False HD voltage level control.
  • Page 53 *1. Selected by tape condition. Pin No. Signal Function DRM FG Drum FG input. tape good normal poor CAP FG Capstan FG input. signal OSD MUTE Video output mute signal. H : Gray back. (Not used. (open)) RENTAL CAP RVS Capstan reverse control.
  • Page 54 4-2. CIRCUIT BOARDS LOCATION Reference information RESISTOR : RN METAL FILM TUNER TUNER : RC SOLID (TU102) (TU101) : FPRD NONFRAMMABLE CARBON : FUSE NONFLAMMABLE FUSIBLE : RW NONFLAMMABLE WIREWOUND : RS NONFLAMMABLE METAL OXIDE : RB NONFLAMMABLE CEMENT YG-H3 : Ŷ...
  • Page 81 SECTION 5 The componants identified by EXPLODED VIEWS shading and mark are criti- cal for safety. Replace only with part number NOTE: specified. • Items marked " * " are not stocked since • Items with no part number and no description are not stocked because they they are seldom required for routine are seldom required for routine service.
  • Page 82 The componants identified by Les composants identifies par 5-2. CHASSIS shading and mark are criti- une trame et une marque cal for safety. sont critiques pour la securite. : +BVTP 3X12 7-685-648-79 Replace only with part number Ne les remplacer que par une specified.
  • Page 83 5-3. MECHANISM DECK ASSEMBLY (1) : SCREW (3X8) 7-685-646-79 : STOP RING 2. 4, TYPE-CS 7-624-190-61 : STOP RING 3. 0, TYPE-E 7-646-106-04 £ supplied not supplied £ supplied REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK ------------ -------------...
  • Page 84 5-4. MECHANISM DECK ASSEMBLY (2) : SCREW (3X8) 7-685-646-79 : +P 3X6 7-682-547-04 £ £ REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK ------------ ------------- ------------------- ------------- ------------ ------------- ------------------- ------------- 3-960-138-01 ARM, PENDULUM COMPULSION 3-958-390-01 SHAFT, PC BOARD 3-958-389-01 CATCHER 3-958-391-01 PLATE, LIGHT GUIDE, LED 3-958-535-01 SPRING, TENSION...
  • Page 85 5-5. MECHANISM DECK ASSEMBLY (3) : SCREW (3X8) 7-685-646-79 : SCREW +PS 3X4 7-682-645-01 £ £ £ ¢ REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK ------------ ------------- ------------------- ------------- ------------ ------------- ------------------- ------------- 3-958-160-01 PROPELLOR 3-958-163-01 SLIDER, MAIN 3-958-157-01 WHEEL, WORM * 3-958-763-01 RETAINER...
  • Page 86 5-6. MECHANISM DECK ASSEMBLY (4) :+B 2X3 7-621-772-08 supplied REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK ------------ ------------- ------------------- ------------- ------------ ------------- ------------------- ------------- X-3943-886-1 TG1 ASSY X-3943-897-1 LEVER ASSY, TRIGGER 3-958-492-01 SPRING (TG1), TENSION COIL A-6739-102-A RKB BLOCK ASSY X-3944-378-1 ROLLER ASSY, GUIDE 3-962-960-01 GEAR (T-K), IDLER...
  • Page 87 SECTION 6 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- (f2)A sont critiques pour la securite. cal for safety. ELECTRICAL PARTS LIST Ne les remplacer que par une Replace only with part number piece portant le numero specifie.
  • Page 88 Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified. piece portant le numero specifie. REF.
  • Page 89 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie. specified.
  • Page 90 Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified. piece portant le numero specifie. REF.
  • Page 91 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- AC(h3) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie. specified.

  • Page 92: Exploded Views 5-1. Picture Tube

    Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque (h3)(h4)(yc) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified. piece portant le numero specifie. REF.

  • Page 93: Chassis

    Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- (yc) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie. specified.

  • Page 94: Exploded Views

    Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque (yc) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified. piece portant le numero specifie. REF.
  • Page 95 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- (yc) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie. specified.
  • Page 96 Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque ( m a ) sont critiques pour la securite. cal for safety. VIDEO BLOCK Ne les remplacer que par une Replace only with part number specified.
  • Page 97 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- ( m a ) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie.

  • Page 98: Electrical Parts List

    Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque ( m a ) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified.
  • Page 99 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- ( m a ) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie.
  • Page 100 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- ( m a ) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified.
  • Page 101 Les composants identifies par The componants identified by une trame et une marque shading and mark are criti- ( m a ) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number piece portant le numero specifie.
  • Page 102 Les composants identifies par The componants identified by shading and mark are criti- une trame et une marque ( m a ) sont critiques pour la securite. cal for safety. Ne les remplacer que par une Replace only with part number specified.
  • Page 103 REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK ------------ ------------- ------------------- ------------- ------------ ------------- ------------------- ------------- Sony Corporation English 96IK15654-1 Display Company Printed in Japan 9-965-127-01 Quality Engineering Dept. C 1996. 9 – 114 –...

This manual is also suitable for:

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