Sony KV-28WF1A Service Manual
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Sony KV-28WF1A Service Manual

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SERVICE MANUAL

MODEL
COMMANDER
KV-28WF1A
KV-28WF1B
KV-28WF1D
KV-28WF1E
MICROFILM
DEST.
CHASSIS NO.
RM-839
Italian
SCC-K05Q-A
RM-839
French SCC-K01S-A
RM-839
AEP
SCC-K07T-A
RM-839
Spanish SCC-K06S-A
MODEL
KV-28WF1K
KV-28WF1R
KV-28WF1U
TRINITRON COLOR TV
— 1 —
KV-28WF1
BE-3D
CHASSIS
COMMANDER
DEST.
RM-839
OIRT
RM-839
OIRT
RM-839
UK
R
CHASSIS NO.
SCC-K20H-A
SCC-K20G-A
SCC-K04N-A
R

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Summary of Contents for Sony KV-28WF1A

  • Page 1: Service Manual

    KV-28WF1 SERVICE MANUAL BE-3D CHASSIS MODEL MODEL COMMANDER DEST. COMMANDER DEST. CHASSIS NO. CHASSIS NO. KV-28WF1A RM-839 Italian SCC-K05Q-A KV-28WF1K RM-839 OIRT SCC-K20H-A RM-839 French SCC-K01S-A RM-839 OIRT SCC-K20G-A KV-28WF1B KV-28WF1R RM-839 SCC-K04N-A KV-28WF1D RM-839 SCC-K07T-A KV-28WF1U KV-28WF1E RM-839 Spanish SCC-K06S-A...

  • Page 2: Specifications

    KV-28WF1 a i l SPECIFICATIONS Picture Tube Super Trinitron [FRONT] Approx. 71 cm (28 inches) 3 , Video input - phono jack (Approx. 66 cm picture measured 3 , Audio inputs - phono jacks diagonally) 3 , S video input - 4 pin DIN 110°...
  • Page 3 KV-28WF1 [RM-839] Remote control system Infrared control Power requirements 3V dc (2 batteries) R6 (size AA) Dimensions Approx. 210x45x24 mm (w/h/d) Weight Approx. 90g (Not including battery) Design and specifications are subject to change without notice. l i o a i l s i l WARNING ( KV-28WF1U only )
  • Page 4 KV-28WF1 21 pin connector ( :2/q2 R/D/D/D-L/G/S/I ) t f ) t f ± v i t ± v i t ± v i t 1 ± v i t 1 ± v i t 1 ± v i t l i e Connected Not Connected (Open)

  • Page 5: Table Of Contents

    APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES PUBLISHED BY SONY. COMPOSANTS SONY DONT LE NUMÉRO DE PIÉCE EST INDIQUÉ DANS LE PRÉSENT MANUEL OU DANS DES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 20: Disassembly

    SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-2. CHASSIS ASSY REMOVAL Rear Cover Seven screws (BVTP 4x16) 2-3-2. SERVICE POSITION (2) 2-3-1. SERVICE POSITION (1)

  • Page 21: Wire Dressing

    2-4. WIRE DRESSING 2-5. A BOARD REMOVAL A board. 2-6. A EXTENSION BOARD A board BE-3D EXTENSION BOARD...

  • Page 22: Picture Tube Removal

    2-7. PICTURE TUBE REMOVAL • 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. Two DGC holers * REMOVING PROCEDURES.

  • Page 23: Removal And Replacement Of The Main-Bracket

    REMOVAL AND REPLACEMENT OF THE MAIN-BRACKET For safety reasons, on no account should the plates be removed BOTTOM PLATES. and not refitted after servicing. (1) REMOVING THE PLATES (2) REFITTING THE PLATES Because the plates differ in size it is important that the correct plates are refitted in their In the event of servicing being required to the solder side of the D Board printed original location.

  • Page 24: Set-Up Adjustments

    KV-28WF1 SECTION 3 SET-UP ADJUSTMENTS • • When complete readjustment is necessary or a new Carry out the following adjustments in this order : picture tube is installed, carry out the following 1. Beam landing adjustments. 2. Convergence • Unless there are specific instructions to the contrary, 3.

  • Page 25: Convergence

    KV-28WF1 3-2. CONVERGENCE Preparation: • Tilt the V.STAT magnet and adjust the static • Before starting this adjustment, adjust the focus, convergence by opening or closing the V.STAT magnet. horizontal size, and vertical size. • Minimize the brightness setting. • Provide a dot pattern.
  • Page 26 KV-28WF1 • Operation of BMC (Hexapole) Magnet V.STAT Purity BMC (Hexapole) • The respective dot position resulting from moving each magnet interact, so be sure to perform adjustment while tracking. Use the H.STAT VR to adjust the red, green, and blue dots so they coincide at the centre of the screen (by moving the dots in the horizontal direction).

  • Page 27: White Balance

    KV-28WF1 3-3. WHITE BALANCE (3) Screen corner convergence. If you are unable to adjust the corner convergence properly, G2 Setting correct them with the use of permalloy assemblies. 1. Switch the set into AV mode (apply no signal to the AV connectors).

  • Page 28: Circuit Adjustments

    KV-28WF1 SECTION 4 CIRCUIT ADJUSTMENTS 4-1. ELECTRICAL ADJUSTMENTS PICTURE ADJUSTMENT Service adjustment to this model can be performed AFC mode with the supplied remote commander RM-862. REF position HOW TO ENTER INTO SERVICE MODE SCP BGR SCP BGF 1. Turn on the main power switch of the set and Trap Fo enter into standby mode.
  • Page 29 KV-28WF1 SUB BRIGHTNESS ADJUSTMENT AGC ON/OFF 1. Input a Phillips pattern. Constant gain CDB 2. Set the picture control to minimum. FM prescale FMP 3. Enter into the Picture Adjustment Service Menu. Zwei mono-st WHI 4. Adjust the Sub-Brightness data so that there is barely a Zwei st-mono WLO difference between the 0 IRE and 10 IRE signal.
  • Page 30 KV-28WF1 SYSTEM B/G, D/K, I & L I.F ADJUSTMENT DEFLECTION SYSTEM ADJUSTMENT 1. Input an off air signal of between 60-100dBuV / 75 ohm 1. Enter into the Geometry Adjustment Service Menu. terminated, via the tuner socket. 2. Select and adjust each item in order to obtain the optimum 2.

  • Page 31: Test Mode

    KV-28WF1 4-2. TEST MODE 2: Is available by pressing Test button twice, OSD " TT " appears. The functions described below are available by pressing the two numbers. To release the Test mode 2, press 0 twice, or switch the TV into stand-by mode. Note: TT modes 40-49 require the TV to be in programme 59 before the command is accepted.
  • Page 32 KV-28WF1 i t s i t s t i s t l i f t l i f y t i y t i t i s t i s t i s t i s These test modes can set the delay byte to any value 0-31 t i s which creates a (value x 20) mS delay.

  • Page 33: Be-3D Self Diagnostic Software

    KV-28WF1 4-3. BE-3D SELF DIAGNOSTIC SOFTWARE The identification of errors within the BE-3D chassis is triggered in 1 of 2 ways :- 1: Bus busy or 2: Device failure to respond to IIC. In the event of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with continuous flashing LED) and then communicate with each device in turn to establish if a device is faulty.
  • Page 34 T803 FBT D901 RES STBY 5V Q900 IC500 D810 TO PICTURE V OUT 200V RECT 200V TUBE SWITCH RESP Q501 SIRCS D505 D504 135V -15V D507 +15V TO C BOARD IC900 FBT —15V J701 (G4) D803 INFRARED RECEIVER SWITCH SWITCH D502 CN902 V BOOST...
  • Page 35 T803 FBT D901 RES STBY 5V Q900 IC500 D810 TO PICTURE V OUT 200V RECT 200V TUBE SWITCH RESP Q501 SIRCS D505 D504 135V -15V D507 +15V TO C BOARD IC900 FBT —15V J701 (G4) D803 INFRARED RECEIVER SWITCH SWITCH D502 CN902 V BOOST...

  • Page 36: D Board

    WAVEFORMS C BOARD 110 Vp-p (H) 108 Vp-p (H) 90 Vp-p (2H) 21 Vp-p (2H) WAVEFORMS D BOARD 1.2K Vp-p (H) 56.0 Vp-p (V) 13.0 Vp-p (H) 178 Vp-p (H) 2.6 Vp-p (H) 56 Vp-p (V) 31 Vp-p (V) 140 Vp-p (H) 3.9 Vp-p (H) 1.0 Vp-p (H) 28 Vp-p (H)
  • Page 37 A BOARD IC301 CXA2000Q-TL A BOARD IC4 PST593C H SYNC PHASE 32fH V SYNC PHASE PHASE GATE H.DRIVE 1/32 SHIFT SAND CASTLE DELAY V out SHARP D PIC 50/60 ID TRAN NESS VIDEO TRAP CONT WIDE Count Down Sawtooth GATE 525/625 Gen.

  • Page 44: Semiconductors

    KV-28WF1 5-4. SEMICONDUCTORS CXA2040Q-T4 MSP3400C-PS-C6-T STR-S6708 BF871-127 MSP3410B-PS-F7-T BF421L-AMMO (TOP VIEW) JA101TP-Q ( TOP VIEW ) 2SA733-K L4941BV 2SA933AS TEA7605 2SA933S PST593C-MMP-4P 2SA1091-O STV9379 2SC3502-E 2SC3601-E 2SC2808STP-R ( TOP VIEW ) E C B LM393P M5216P SBX1790-51 DTA144ES TDA2822M µPC393C DTC114ES DTC143TS TDA4665T-T...
  • Page 45 KV-28WF1 FML-G12S RD3.9ESB2 TLP721(D4-) AU-01Z-V1 MTZJ-3.6A EG-1Z-V1 GP08D RD5.1ESB2 MTZJ-3.9B RD5.6ESB2 EGP20G RGP02 MTZJ-5.1B RD6.2ESB2 EL1Z RGP10GPKG23 MTZJ-5.6B RGP15GPKG23 RD6.8ESB2 EM1-V1 MTZJ-6.2B RU3YX-V1 RD7.5ESB2 EU-1-V1 MTZJ-6.8B RD10ESB2 EU2A RU4AM-T3 MTZJ-7.5C RD39ES-B2 EU2-V1 RU4DS MTZJ-9.1 MTZJ-T-77-9.1A MTZJ-10 1SS133T-77 2SC2785-HFE MTZJ-39 CATHODE CATHODE ANODE ANODE...

  • Page 46: Exploded Views

    DESCRIPTION REMARK REF NO PART NO DESCRIPTION REMARK 1-571-433-21 SWITCH, PUSH (AC POWER) 1-693-338-11 TUNER (TUVIF) (AEP) *4-203-315-01 BRACKET, MAIN (KV-28WF1A/28WF1D/28WF1E/ *A-1640-235-A D3 BOARD, COMPLETE 28WF1K/28WF1R) *4-203-404-01 BRACKET, D3 1-693-340-11 TUNER (TUVIF) (FR) (KV-28WF1B) 1-765-286-11 CORD, POWER 2.5A/250V 1-693-339-11 TUNER (TUVIF) (UK)

  • Page 47: Picture Tube

    PART NO DESCRIPTION REMARK REF NO PART NO DESCRIPTION REMARK X-4200-344-1 BEZNET ASSY 52-59 1-505-782-11 SPEAKER, LOUD (KV-28WF1A/28WF1D/ 7-685-661-14 SCREW + BV TP (4X12) TYPE2 IT3 28FW1K/28WF1R) 8-737-773-05 PICTURE TUBE (SD-284T) (W66LGY011X) X-4200-344-2 BEZNET ASSY (KV-28WF1B/28WF1E 8-451-434-21 DEFLECTION YOKE (Y28GIAM) 28WF1U)

  • Page 48: Electrical Parts List

    PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C113 1-126-967-11 ELECT 47MF *A-1632-673-A A BOARD COMPLETE (KV-28WF1A) C115 1-163-129-00 CERAMIC CHIP 330PF **************** (KV-28WF1B) *A-1632-670-A A BOARD COMPLETE (KV-28WF1B) C120 1-163-117-00 CERAMIC CHIP 100PF **************** C121 1-163-113-00 CERAMIC CHIP 68PF...
  • Page 49 C302 1-163-141-00 CERAMIC CHIP 0.001MF C303 1-163-141-00 CERAMIC CHIP 0.001MF CF120 1-409-327-00 TRAP, CERAMIC (6.5MHZ) C304 1-163-038-00 CERAMIC CHIP 0.1MF (KV-28WF1A/28WF1B/28WF1D/28WF1E) C305 1-163-038-00 CERAMIC CHIP 0.1MF < CONNECTOR > C306 1-164-232-11 CERAMIC CHIP 0.01MF C307 1-164-232-11 CERAMIC CHIP 0.01MF 1-695-302-11 CONNECTOR, BOARD TO BOARD 50P C308 1-164-232-11 CERAMIC CHIP 0.01MF...
  • Page 50 D223 8-719-977-22 DIODE DTZ9.1 Q120 8-729-620-06 TRANSISTOR 2SC3052-EF D224 8-719-977-22 DIODE DTZ9.1 Q121 8-729-620-06 TRANSISTOR 2SC3052-EF D225 8-719-977-22 DIODE DTZ9.1 (KV-28WF1A/28WF1B/28WF1D/28WF1E) D226 8-719-977-22 DIODE DTZ9.1 Q122 8-729-620-06 TRANSISTOR 2SC3052-EF D227 8-719-977-13 DIODE DTZ6.8C Q124 8-729-620-06 TRANSISTOR 2SC3052-EF D229 8-719-977-22 DIODE DTZ9.1...
  • Page 51 METAL GLAZE 1/10W R134 1-216-001-00 METAL GLAZE 1/10W 1-216-025-00 METAL GLAZE 1/10W R135 1-216-037-00 METAL GLAZE 1/10W 1-216-025-00 METAL GLAZE 1/10W (KV-28WF1A/28WF1B/28WF1D/28WF1E) 1-216-057-00 METAL GLAZE 2.2K 1/10W 1-216-045-00 METAL GLAZE 1/10W 1-216-057-00 METAL GLAZE 2.2K 1/10W (KV-28WF1K/28WF1R/28WF1U) 1-216-025-00 METAL GLAZE 1/10W...
  • Page 52 R290 1-216-689-11 METAL GLAZE 1/10W R291 1-216-025-71 METAL GLAZE 1/10W TU101 1-693-338-11 (TUVIF) (AEP) R292 1-216-025-71 METAL GLAZE 1/10W (KV-28WF1A/28WF1D/28WF1E/28WF1K/28WF1R) R293 1-216-025-71 METAL GLAZE 1/10W 1-693-340-11 (TUVIF) (FR) (KV-28WF1B) R294 1-216-025-71 METAL GLAZE 1/10W 1-693-339-11 (TUVIF) (UK) (KV-28WF1U) R295 1-216-025-71...
  • Page 53 KV-28WFB 28WFK/28WFR/28WF1U REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK A-1652-037-A IF BOARD, COMPLETE (KV-28WF1A/28WF1D/ 1-216-045-00 METAL GLAZE 1/10W ****************** 28WF1E/28WF1K/ (KV-28WF1A/28WF1D/28WF1E/ 28WFR) 28WX1K/28WF1R) A-1652-038-A IF BOARD, COMPLETE (KV-28WF1U) 1-216-049-91 METAL GLAZE 1/10W...
  • Page 54 KV-28WF1 The components identified by Les composants identifies par shading and marked are critical une trame et une marque sont for safety. critiques pour la securite. Replace only with the part number Ne les remplacer que par une piece IF ( specified.
  • Page 55 KV-28WF1 The components identified by Les composants identifies par shading and marked are critical une trame et une marque sont for safety. critiques pour la securite. Replace only with the part number Ne les remplacer que par une piece specified. portant le numero specifie.
  • Page 56 KV-28WF1 The components identified by Les composants identifies par shading and marked are critical une trame et une marque sont for safety. critiques pour la securite. Replace only with the part number Ne les remplacer que par une piece specified. portant le numero specifie.
  • Page 57 KV-28WF1 The components identified by Les composants identifies par shading and marked are critical une trame et une marque sont for safety. critiques pour la securite. Replace only with the part number Ne les remplacer que par une piece specified. portant le numero specifie.
  • Page 58 KV-28WF1 The components identified by Les composants identifies par shading and marked are critical une trame et une marque sont for safety. critiques pour la securite. Replace only with the part number Ne les remplacer que par une piece specified. portant le numero specifie.
  • Page 59 KV-28WF1 The components identified by Les composants identifies par shading and marked are critical une trame et une marque sont for safety. critiques pour la securite. Replace only with the part number Ne les remplacer que par une piece specified. portant le numero specifie.
  • Page 60 8-451-434-11 DEFLECTION YOKE (Y28GIAM) 8-453-005-51 NECK ASSY, (NA297-M5) V901 8-737-773-05 PICTURE TUBE (SD-284T)(W66LGY011X) **************************************************************** ACCESSORIES AND PACKING MATERIALS ********************************* 4-203-891-41 MANUAL, INSTRUCTION (KV-28WF1A)(ITALIAN) 4-203-891-51 MANUAL, INSTRUCTION (KV-28WF1B) (FRENCH/GERMAN/ITALIAN/DUTCH) 4-203-891-11 MANUAL, INSTRUCTION (KV-28WF1D) (DUTCH/GREEK/ENGLISH/GERMAN) 4-203-891-71 MANUAL, INSTRUCTION (KV-28WF1E)(SPANISH) 4-203-509-81 MANUAL, INSTRUCTION (KV-28WF1E)
  • Page 61 Ne les remplacer que par une piece specified. portant le numero specifie. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK Sony Corporation English Sony UK 97GP7187-1 Service Promotions Div. 9-974-957-01 Printed in U.K. © 1997.7 — 86 —...

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