Sony TRINITRON KV-T21MN8 Service Manual
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Sony TRINITRON KV-T21MN8 Service Manual

Sony TRINITRON KV-T21MN8 Service Manual

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SERVICE MANUAL

MODEL
COMMANDER DEST.
KV-T21MN8
RM-870 Hong Kong
KV-T21MN81
RM-870 GE
CHASSIS NO.
MODEL
SCC-J16G-A
SCC-J40V-A
TRINITRON
BG-1S
CHASSIS
COMMANDER DEST. CHASSIS NO.
COLOR TV
®

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Summary of Contents for Sony TRINITRON KV-T21MN8

  • Page 1: Service Manual

    SERVICE MANUAL BG-1S CHASSIS MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO. KV-T21MN8 RM-870 Hong Kong SCC-J16G-A KV-T21MN81 RM-870 GE SCC-J40V-A TRINITRON COLOR TV ®...
  • Page 2 CARBON PAINTED ON THE CRT, AFTER REMOVING THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE ANODE. THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. – 2 –...

  • Page 3: Table Of Contents

    KV-T21MN8/T21MN81 RM-870 TABLE OF CONTENTS Section Title Page Section Title Page 6. DIAGRAMS 1. GENERAL ..............6-1. Block Diagram ............2. DISASSEMBLY 6-2. Circuit Boards Location ........2-1. Rear Cover Removal ........... 6-3. Schematic Diagrams and Printed Wiring Boards. (1) Schematic Diagram of A Board ......2-2.

  • Page 4: General

    SECTION 1 The operating instructions mentioned here are partial abstracts from the Operating Instructions Manual. The page numbers of the Operating GENERAL Instruction Manual remain as in this manual. TV SYSTEM AUTO PROGR TV SYSTEM AUTO PROGR...
  • Page 5 Getting Started Front of TV Connections Camcorder VIDEO INPUT VIDEO AUDIO L (MONO) to video and audio outputs : Signal flow Connecting a VHF antenna or a combination VHF/UHF antenna When using the video input jacks — 75-ohm coaxial cable (round) Do not connect video equipment to the video input jacks at the front and the rear of your TV simultaneously;...
  • Page 6 Operations Presetting channels Presetting channels manually Watching the TV Switching off the TV To switch off the TV temporarily, press POWER on the To change the channel for a particular program remote commander. position or to receive a channel with a weak signal, preset the channel manually.

  • Page 7: Adjusting The Picture And Sound

    turns into standby mode will appear when the TV is turned on Each time you press SELECT, the screen changes as Displaying on-screen information Adjusting the picture using the Wake Up Timer. follows: • If no buttons or controls are pressed for more than two hours after the TV is turned on using the Wake Up Timer, the TV Press DISPLAY/REVEAL.
  • Page 8 Using FASTEXT Receiving area for NICAM and A2 (German) Selecting a stereo or Viewing Teletext programs This feature allows you to quickly access a Teletext System Receiving area page that uses FASTEXT. When a FASTEXT page is bilingual program NICAM Hong Kong, Singapore, New Zealand, broadcasted, a color-coded menu appears at the bottom etc.

  • Page 9: Troubleshooting

    Additional Information Good picture Troubleshooting Noisy sound / Check the TV SYSTEM setting. No picture No sound If you have any problems, read this manual again and check the countermeasure for each of the symptoms listed below. If the problem persists, contact your nearest authorized service center or dealer.

  • Page 10: Disassembly

    SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-3. F1 BOARD REMOVAL (EXCEPT FOR KV-T21MN81) F1 board 2 Two screws (BVTP 4×16) 3 One screw (BVTP 3×16) 1 Two screws (BVTP 4×16) 2-2. A BOARD REMOVAL 2-4. SERVICE POSITION A board Lever Lever A board...

  • Page 11: Replacement Of Parts

    2-5. REPLACEMENT OF PARTS 2-6. DEMAGNETIZATION COIL REMOVAL For replacement of the Multi Button, Power Button and Light Guide, cut the welded portions from them, exchange with the new parts, and fix them with screws (+BVTP) respectively. 2-5-1. REPLACEMENT OF MULTI BUTTON 1 Demagnetization coil 2 Tension spring Two screws...

  • Page 12: Picture Tube Removal

    2-7. PICTURE TUBE REMOVAL 3 F1 board 4 C board 7 VM board 5 Deflection yoke 2 A board 2 Using a thumb press down then pull up the rubber cap firmly in the direction indicated by the arrow b. 6 Four screws (Tapping screws) 1 Anode cap...

  • Page 13: Set-Up Adjustments

    KV-T21MN8/T21MN81 SECTION 3 RM-870 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 rated power 2.

  • Page 14: Convergence

    KV-T21MN8/T21MN81 RM-870 3-2. CONVERGENCE • Operation of the V.STAT magnet. Preparation : • If the V.STAT magnet is moved in the direction of the a and Before starting this adjustment, adjust the focus, horizontal size b arrows, the red, green and blue dots move as shown below. and vertical size.
  • Page 15 KV-T21MN8/T21MN81 RM-870 (2) Dynamic Convergence Adjustment Preparation : • Before starting this adjustment, adjust the horizontal static 3. Move the deflection yoke as shown in the figure below and convergence and the vertical static convergence. optimize the convergence. 1. Slightly loosen the deflection yoke screws. 4.

  • Page 16: Focus Adjustment

    KV-T21MN8/T21MN81 RM-870 DATA 3-3. FOCUS ADJUSTMENT Adjust FOCUS control on the flyback transformer for the best SERVICE focus. Adjustment Item Item number WRITE MUTING Executes the writing FOCUS SCREEN (NOT USED) (T851) a. AN ITEM OF ADJUSTMENT 3-4. G2 (SCREEN) AND WHITE BALANCE ADJUSTMENTS Item Adjustment...

  • Page 17: Self Diagnosis Function

    KV-T21MN8/T21MN81 SECTION 4 RM-870 SELF DIAGNOSIS FUNCTION If no acknowledgement is returned from a device which is turned "ON", the device has a problem. In this case, one of the LED's responding to the problem device will flicker a defined number of times. Flickering is operated by lighting the LED's for 60ss each time.

  • Page 18: Circuit Adjustments

    KV-T21MN8/T21MN81 RM-870 SECTION 5 CIRCUIT ADJUSTMENTS 5-1. ADJUSTMENTS WITH COMMANDER Service adjustments are made with the RM-870 that comes with this unit. [1], [4] Raise/lower the service item number [3], [6] Raise/lower the data [MUTING] Writes Entering service mode Executes the writing With the unit on standby ↓...

  • Page 19: Adjustment Method

    KV-T21MN8/T21MN81 RM-870 5-2. ADJUSTMENT METHOD Item Number 08 Use the same method for Items Number 00-4B. Use [1] and [4] to This explanation uses V-SHIFT as an example. select the adjustment item, use [3] and [6] to adjust, write with 1.
  • Page 20 KV-T21MN8/T21MN81 RM-870 Adjustment Item Table Item Adjustment Data Initial Standard data Note Device number Item range data 00–3F 50: 2C 60: 33 H SHIFT TDA8375 00–3F 50: 30 60: 30 H SIZE TDA8375 00–3F 50: 25 60: 25 PIN AMPLITUDE TDA8375 00–3F 50: 10...
  • Page 21 KV-T21MN8/T21MN81 RM-870 Adjustment Item Table Item Adjustment Data Initial Standard data Note Device number Item range data 00–FF NICAM FAW THRESH MSP3410 00–FF NICAM ERROR BIT (MONO) MSP3410 00–FF NICAM ERROR BIT (NICAM) MSP3410 00–FF W. G. CHANGE DATA MSP3410 00–FF W.
  • Page 22 KV-T21MN8/T21MN81 RM-870 ITEM INFORMATION • 10. DL: TV/MIX Mode 0=Interlace 1=Non interlace, TEXT Mode 0=Non interlace 1=Interlace • 42. ABL: Bright ABL ON/OFF ON=1 OFF=0 • 49. OP0, • 4A. OP1 • 4B. OP2 : Input data are different according to models. AV INPUT : 00 →...

  • Page 23: A Board Adjustment After Ic003 (Memory) Replacement

    KV-T21MN8/T21MN81 RM-870 5-3. A BOARD ADJUSTMENT AFTER IC003 5-4. PICTURE DISTORTION ADJUSTMENT (MEMORY) REPLACEMENT Item Number 00 – 08 1. Enter to Service Mode. HSF (H SHIFT) 00 HSF (H SHIFT) 2. Press commander buttons [5] and [0] (Data Initialize), and [2] and [0] (Data Copy) to initialize the data.
  • Page 24 KV-T21MN8/T21MN81 RM-870 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...

  • Page 25: Diagrams 6-1. Block Diagram

    KV-T21MN8/T21MN81 KV-T21MN8/T21MN81 RM-870 RM-870 SECTION 7 EXPLODED VIEW NOTE: • • Items with no part number and no Items marked " * " are not stocked since The components identified by they are seldom required for routine shading and mark ! are critical description are not stocked because they are seldom required for routine service.

  • Page 26: Electrical Parts List

    KV-T21MN8/T21MN81 KV-T21MN8/T21MN81 RM-870 RM-870 SECTION 8 ELECTRICAL PARTS LIST NOTE: • Items marked " ∗ " are not stocked since REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK RESISTORS • All resistors are in ohms they are seldom required for routine The components identified by shading •...
  • Page 27 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK C606 1-161-830-00 CERAMIC 0.0047MF 500V C1202 1-164-004-11 CERAMIC CHIP 0.1MF C607 1-161-830-00...
  • Page 28 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK <DIODE> <FERRITE BEAD> D001 8-719-109-81 DIODE RD4.7ESB2 FB101 1-410-397-21 FERRITE 1.1UH...

  • Page 29: Circuit Boards Location

    KV-T21MN8/T21MN81 RM-870 REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK L401 1-410-498-11 INDUCTOR 1.2UH Q1207 8-729-422-27 TRANSISTOR 2SD601A-Q L402 1-410-510-11 INDUCTOR 12UH Q1208 8-729-422-27 TRANSISTOR 2SD601A-Q L403 1-410-510-11 INDUCTOR 12UH Q1264 8-729-424-67 TRANSISTOR UN2216 L404 1-410-508-11 INDUCTOR 8.2UH L405...
  • Page 30 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R090 1-216-073-00 RES,CHIP 1/10W R327 1-216-029-00 RES,CHIP 1/10W R101 1-216-065-91 RES,CHIP...
  • Page 31 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R432 1-216-041-00 RES,CHIP 1/10W R809 1-247-756-11 CARBON 2.2K 1/2W F R433 1-216-081-00...
  • Page 32 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R1219 1-216-073-00 RES,CHIP 1/10W T801 1-437-195-11 TRANSFORMER, HORIZONTAL DRIVE R1220 1-216-049-91 RES,CHIP...

  • Page 33: Schematic Diagrams And Printed Wiring Boards. 29 (1) Schematic Diagram Of A Board

    KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK C1234 1-164-004-11 CERAMIC CHIP 0.1MF <CHIP CONDUCTOR> C1235 1-163-005-11 CERAMIC CHIP 470PF...
  • Page 34 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R1233 1-216-045-00 RES,CHIP 1/10W D702 8-719-911-19 DIODE 1SS119-25 R1234 1-216-045-00 RES,CHIP...
  • Page 35 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. 1 (KV-T21MN81) 1 (KV-T21MN81) Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R738 1-247-807-31 CARBON 1/4W 1-164-004-11 CERAMIC CHIP 0.1MF...
  • Page 36 KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. 1 (KV-T21MN81) Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK 1-216-295-91 SHORT <COIL> 1-216-083-00 RES,CHIP 1/10W 1-410-464-11 INDUCTOR 3.3UH...

  • Page 37: Schematic Diagrams Of A3, F1 And V1 Boards

    KV-T21MN8/T21MN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK L1761 1-410-478-11 INDUCTOR 47UH MISCELLANEOUS L1762 1-408-610-31 INDUCTOR 39UH ***************** ! 1-409-942-11...
  • Page 38 ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK Sony Corporation English 98EM70183-1 Display Company Printed in Malaysia © 9-965-684-01 TV Display Business Asia 1998.

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