Sony TRINITRON KV-T21MN8 Service Manual Download Page 38

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KV-T21MN8/T21MN81

RM-870

REF. NO. PART NO.

DESCRIPTION

REMARK

REF. NO. PART NO.

DESCRIPTION

REMARK

The components identified by shading
and mark

are critical for safety.

Replace only with part number specified.

9-965-684-01

English

98EM70183-1

Printed in Malaysia



1998. 5

Sony Corporation

Display Company

TV Display Business Asia

Summary of Contents for TRINITRON KV-T21MN8

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

Page 2: ... 2 Inputs Antenna 75 ohms VIDEO IN jacks phono jacks Video 1 Vp p 75 ohms Audio 500 mVrms high impedance Outputs Headphone jack minijack MONITOR OUT jacks phono jacks Video 1 Vp p 75 ohms Audio 500 mVrms Picture tube 21 in Tube size cm 54 Measured diagonally Screen size cm 51 Measured diagonally Dimensions w h d mm 527 464 471 Mass kg 22 Design and specifications are subject to change without noti...

Page 3: ...e Adjustments 16 4 SELF DIAGNOSIS FUNCTION 17 5 CIRCUIT ADJUSTMENTS 5 1 Adjustments with Commander 18 5 2 Adjustment Method 19 5 3 A Board Adjustment after IC003 Memory Replacement 23 5 4 Picture Distortion Adjustment 23 6 DIAGRAMS 6 1 Block Diagram 25 6 2 Circuit Boards Location 29 6 3 Schematic Diagrams and Printed Wiring Boards 29 1 Schematic Diagram of A Board 33 2 Schematic Diagrams of A3 F1 ...

Page 4: ...ERAL The operating instructions mentioned here are partial abstracts from the Operating Instructions Manual The page numbers of the Operating Instruction Manual remain as in this manual 2 3 B G I D K M TV SYSTEM AUTO PROGR TV SYSTEM AUTO PROGR ...

Page 5: ... MONO AUDIO R to antenna socket When connecting a monaural VCR Connect the yellow plug to VIDEO and the black plug to AUDIO L MONO Getting Started 5 EN Front of TV Connecting audio video equipment using MONITOR OUT jacks to antenna socket Rear of TV to antenna output to video and audio inputs Signal flow or VCR Audio system When using the video input jacks Do not connect video equipment to the vid...

Page 6: ... system appears 3 Press AUTO PROGR To start presetting channels automatically from the specified program position 1 Press MANUAL PROGR 2 Press TV SYSTEM to select your local TV system 3 Press PROGR to select the program position 4 Press AUTO PROGR Presetting channels manually To change the channel for a particular program position or to receive a channel with a weak signal preset the channel manua...

Page 7: ...edly until WAKE UP TIMER OFF appears or turn off the main power of the TV Notes The Wake Up Timer starts immediately after the on screen display disappears The last TV program position or video mode just before the TV WAKE UP TIMER 10M WAKE UP TIMER OFF WAKE UP TIMER 12H00M After 12 hours No wake up timer INDEX WAKE UP After 60 minutes After 90 minutes No sleep timer After 30 minutes SLEEP TIMER 3...

Page 8: ... To resume normal Teletext operation press VIDEO HOLD again or TEXT Revealing concealed information Press DISPLAY REVEAL To conceal the information press DISPLAY REVEAL again Enlarging the Teletext display Press A B ENLARGE Each time you press A B ENLARGE the Teletext display changes as follows z z z Normal size Waiting for a Teletext page while watching a TV program TEXT CLEAR 1 Key in the page n...

Page 9: ...again and check the countermeasure for each of the symptoms listed below If the problem persists contact your nearest authorized service center or dealer Snowy picture Noisy sound Check the antenna Check the antenna connection on the TV and on the wall Check the TV SYSTEM setting Dotted lines or stripes This may be caused by local interference e g cars neon signs hair dryers etc Adjust the antenna...

Page 10: ... 1 REAR COVER REMOVAL 2 3 F1 BOARD REMOVAL EXCEPT FOR KV T21MN81 SECTION 2 DISASSEMBLY 2 2 A BOARD REMOVAL 2 4 SERVICE POSITION Lever Lever A board A board F1 board 2 Two screws BVTP 4 16 3 One screw BVTP 3 16 1 Two screws BVTP 4 16 ...

Page 11: ...ed portions from them exchange with the new parts and fix them with screws BVTP respectively 2 5 1 REPLACEMENT OF MULTI BUTTON 2 5 2 REPLACEMENT OF POWER BUTTON AND LIGHT GUIDE 2 6 DEMAGNETIZATION COIL REMOVAL Two screws BVTP 3 12 Cut Light guide Power button Two screws BVTP 3 12 1 Demagnetization coil 2 Tension spring Picture tube ...

Page 12: ...e rubber too hard so as not to damage the inside of anode caps A metal fitting called the shatter hook terminal is built into the rubber 3 Do not turn the foot of rubber over too hard The shatter hook terminal will stick out or damage the rubber REMOVAL OF ANODE CAP NOTE After removing the anode short circuit the anode of the picture tube and the anode cap to the metal chassis CRT shield or carbon...

Page 13: ...eas a d b c a d b a c d Fig 3 1 Preparation In order to reduce the influence of geomagnetism on the set s picture tube face it east or west Switch on the power and degauss with the degausser 3 1 BEAM LANDING 1 Input a white signal with the pattern generator Contrast Brightness 2 Position neck assy as shown in Figure 3 1 3 Set the pattern generator raster signal to a green raster 4 Move the deflect...

Page 14: ...the direction of the a and b arrows the red green and blue dots move as shown below B R B R a b b b a b a b a R G B b B G R b b a a 1 2 3 G G B G R R G B R G B G R B Center dot V STAT Magnet C board RV 701 SCREEN G2 1 Moving vertically adjust the V STAT magnet so that the red green and blue dots are on top of each other at the center of the screen 2 Moving horizontally adjust the H STAT VR magnet ...

Page 15: ...aration Before starting this adjustment adjust the horizontal static convergence and the vertical static convergence 1 Slightly loosen the deflection yoke screws 2 Remove the deflection yoke spacer 3 Screen corner Convergence a d screen corner misconvergence b a c d B G R B G R R G B R G B R G B R G B B G R B G R R G B B G R B G R R G B Fix a Permalloy assy corresponding to the misconverged areas ...

Page 16: ...usted items again to confirm adjustments were made Item number Note Adjustment item Initial DATA 09 RDR 28 WHITE POINT R 0A GDR 20 WHITE POINT G 0B BDR 20 WHITE POINT B SERVICE MUTING 1 F DATA RDR Adjustment Item 09 Item number WRITE 1 F RDR 09 0 Executes the writing 3 4 G2 SCREEN AND WHITE BALANCE ADJUSTMENTS 1 G2 SCREEN ADJUSTMENT RV701 1 Set the PICTURE and BRIGHTNESS to normal 2 Put to VIDEO i...

Page 17: ...s Flickering is operated by lighting the LED s for 60ss each time The flickering frequency responding to each failed device is shown below All the devices are checked one after another from the left of the table If an error is found the responding LED will start flickering So if more than 1 device have failed only the one on the left side will flicker Device Flickering Frequency NONVOLATILE MEMORY...

Page 18: ...iting 7 0 All the data becomes the values in memory 8 0 All user control goes to the standard state 5 0 Service data initialization Be sure not to use usually 2 0 Write 50Hz adjustment data to 60Hz or vice versa The screen display is 1 4 Select the adjustment item 3 6 Raise lower the data MUTING Writes 0 Executes the writing MUTING TEXT VIDEO HOLD TV TEXT CLR SELECT PIC MODE A B ENLARGE WAKE UP IN...

Page 19: ...e with the MUTING button 5 Execute the writing with the 0 button The WRITE display will be changed to green SERVICE Use the same method for Items Number 00 4B Use 1 and 4 to select the adjustment item use 3 and 6 to adjust write with MUTING then execute the write with 0 WRITE WRITE GREEN 0C VSF 08 SERVICE 50 50 50 GREEN 0C VSF 08 Adjust with the 3 and 6 buttons Written with the MUTING Write execut...

Page 20: ...IME CONSTANT TDA8375 0D AGC 00 3F 30 AGC TAKE OVER TDA8375 0E VSW 00 01 TV 00 VIDEO 01 TEXT 00 VIDEO MUTE TDA8375 0F FOR 00 03 03 FORCED FIELD FREQ TDA8375 10 DL 00 01 00 INTERLACE TDA8375 11 POC 00 01 00 SYNCHRO MODE FIX TDA8375 12 VID 00 01 00 VIDEO IDENT MODE TDA8375 13 HCO 00 01 00 EHT TRACKING MODE TDA8375 14 EVG 00 01 00 ENABLE V GUARD TDA8375 15 SBL 00 01 00 SERVICE BLANKING TDA8375 16 PRD ...

Page 21: ...0 3F 00 BLK OFF PICTURE µ CON 37 HBL 00 3F 25 H BLK LEFT WIDTH µ CON 38 HBR 00 3F 20 H BLK RIGHT WIDTH µ CON 39 VBH 00 7F 00 V BLK HIGHT WIDTH µ CON 3A VBL 00 FF FF V BLK LOW WIDTH µ CON 3B ODL 00 FF 10 POWER ON DELAY µ CON 3C OFR 00 0F 00 STBY n ON RGB OUT µ CON 3D OFM 00 0F 00 MAIN POWER RGB OUT µ CON 3E OSH 00 3F 0A OSD POSITION H µ CON 3F DKS 00 01 00 D K NICAM µ CON 40 MUT 00 01 00 NO SYNC MU...

Page 22: ...L 01 MONO CXA1315 10 11 STEREO TDA8424 TV System 00 Multi model 01 B G 10 D K I 11 B G D K NTSC SECAM Chin Shrp Dynamic Mode 1 Sharpness 50 0 Sharpness 70 VM Operation 0 OFF 1 ON Item TILT AV Input Sharp 50 Remote Auto Video Text Reserved Preset Program KV T21MN8 0 1 0 0 0 1 0 0 KV T21MN81 0 1 0 0 1 1 0 0 No 4A OP1 Item Wide Tilt TV System NT3 58 SECAM Chinese KV T21MN8 0 0 0 0 0 1 1 1 KV T21MN81 ...

Page 23: ...TER IC003 MEMORY REPLACEMENT 1 Enter to Service Mode 2 Press commander buttons 5 and 0 Data Initialize and 2 and 0 Data Copy to initialize the data 3 Call each item number and check if the respective screen shows the normal picture In case some items are not well adjusted give them fine adjustment Write the data per each item number MUTING 0 4 Select item numbers 49 OP0 4A OP1 and 4B OP2 and respe...

Page 24: ... 24 KV T21MN8 T21MN81 RM 870 MEMO ...

Page 25: ...ICTURE TUBE A51JUH71X 14 8 451 280 33 DEFLECTIONYOKE Y21PXA2 KV T21MN8 8 451 280 81 DEFLECTION YOKE Y21PXA2 S3 KV T21MN81 15 1 452 509 51 NECK ASSY CRT NA308 16 A 1342 395 A VM BOARD BOARD 17 A 1331 577 A C BOARD COMPLETE 18 4 060 267 01 SPACER DY 19 4 047 349 01 HOLDER HV CABLE 20 4 369 318 81 SPRING TENSION 21 1 409 942 11 COIL DEMAGNETIZATION 22 4 054 094 01 SHEET BLIND 23 X 4033 682 1 COVER AS...

Page 26: ...RAMIC CHIP 0 001MF 10 50V C037 1 163 117 00 CERAMIC CHIP 100PF 5 50V C038 1 163 117 00 CERAMIC CHIP 100PF 5 50V C040 1 163 117 00 CERAMIC CHIP 100PF 5 50V C042 1 163 117 00 CERAMIC CHIP 100PF 5 50V C044 1 163 117 00 CERAMIC CHIP 100PF 5 50V C045 1 163 117 00 CERAMIC CHIP 100PF 5 50V C046 1 163 117 00 CERAMIC CHIP 100PF 5 50V C047 1 163 117 00 CERAMIC CHIP 100PF 5 50V C048 1 164 004 11 CERAMIC CHIP...

Page 27: ... CERAMIC 470PF 10 500V C861 1 107 654 11 ELECT 33MF 20 250V C875 1 128 562 11 ELECT 47MF 20 100V C876 1 107 369 11 MYLAR 0 068MF 10 100V C891 1 163 007 11 CERAMIC CHIP 680PF 10 50V C898 1 137 150 11 MYLAR 0 01MF 10 100V C901 1 163 133 00 CERAMIC CHIP 470PF 5 50V C902 1 163 133 00 CERAMIC CHIP 470PF 5 50V C1201 1 126 933 11 ELECT 100MF 20 16V KV T21MN8 C1201 1 104 665 11 ELECT 100MF 20 16V KV T21MN...

Page 28: ...01 8 719 121 24 DIODE RD9 1ESL D1202 8 719 121 24 DIODE RD9 1ESL D1203 8 719 121 24 DIODE RD9 1ESL D1207 8 719 121 24 DIODE RD9 1ESL D1208 8 719 121 24 DIODE RD9 1ESL D1209 8 719 121 24 DIODE RD9 1ESL D1504 8 719 911 19 DIODE 1SS119 25 D1505 8 719 109 81 DIODE RD4 7ESB2 FUSE F601 1 532 237 11 FUSE TIME LAG BET 3 15A 250V KV T21MN81 ONLY FERRITE BEAD FB101 1 410 397 21 FERRITE 1 1UH FB102 1 410 397...

Page 29: ...22 TRANSISTOR 2SA1162 G Q1205 8 729 216 22 TRANSISTOR 2SA1162 G Q1206 8 729 216 22 TRANSISTOR 2SA1162 G Q1207 8 729 422 27 TRANSISTOR 2SD601A Q Q1208 8 729 422 27 TRANSISTOR 2SD601A Q Q1264 8 729 424 67 TRANSISTOR UN2216 Q1265 8 729 424 67 TRANSISTOR UN2216 Q1513 8 729 422 27 TRANSISTOR 2SD601A Q RESISTOR R001 1 216 065 91 RES CHIP 4 7K 5 1 10W R002 1 216 065 91 RES CHIP 4 7K 5 1 10W R003 1 216 06...

Page 30: ...319 1 216 123 11 RES CHIP 1 2M 5 1 10W R320 1 216 083 00 RES CHIP 27K 5 1 10W R321 1 216 689 11 METAL CHIP 39K 0 50 1 10W R322 1 216 083 00 RES CHIP 27K 5 1 10W R325 1 216 295 91 SHORT 0 R326 1 216 039 00 RES CHIP 390 5 1 10W R327 1 216 295 91 SHORT 0 KV T21MN8 R327 1 216 029 00 RES CHIP 150 5 1 10W KV T21MN81 R328 1 216 295 91 SHORT 0 KV T21MN8 R328 1 216 029 00 RES CHIP 150 5 1 10W KV T21MN81 R3...

Page 31: ...F R802 1 249 385 11 CARBON 2 2 5 1 4W F R803 1 216 057 00 RES CHIP 2 2K 5 1 10W R804 1 216 049 91 RES CHIP 1K 5 1 10W R805 1 216 081 00 RES CHIP 22K 5 1 10W R809 1 247 756 11 CARBON 2 2K 5 1 2W F R811 1 216 343 00 METAL OXIDE 0 33 5 1W F R812 1 216 075 00 RES CHIP 12K 5 1 10W R816 1 249 435 11 CARBON 33K 5 1 4W R820 1 216 655 11 METAL CHIP 1 5K 0 50 1 10W R821 1 215 911 11 METAL OXIDE 100 5 3W F R...

Page 32: ...H SPARK GAP SG801 1 519 422 11 GAP SPARK SURFACE WAVE FILTER SWF401 1 760 771 11 FILTER SURFACE WAVE TRANSFORMER T601 1 429 137 11 TRANSFORMER CONVERTER SRT T605 1 424 682 11 TRANSFORMER LINE FILTER T801 1 437 195 11 TRANSFORMER HORIZONTAL DRIVE T851 1 453 193 21 TRANSFORMER ASSY FLYBACK NX 1742 M3A THERMISTOR THP601 1 808 059 32 THERMISTOR POSITIVE TUNER TU101 8 598 323 30 TUNER VSS BT AG401 KV T...

Page 33: ...12 911 11 FERRITE 0UH FB1206 1 412 911 11 FERRITE 0UH FILTER FL1201 1 239 803 11 ENCAPSULATED COMPONENT IC IC1201 8 752 059 57 IC CXA1110BS IC1202 8 759 429 98 IC MSP3410B PP F7 IC1203 8 759 701 75 IC NJM7805FA CHIP CONDUCTOR JR1 1 216 295 91 SHORT 0 JR2 1 216 295 91 SHORT 0 JR3 1 216 295 91 SHORT 0 JR4 1 216 295 91 SHORT 0 JR5 1 216 295 91 SHORT 0 JR6 1 216 295 91 SHORT 0 JR7 1 216 295 91 SHORT 0...

Page 34: ... 00 METAL 270K 1 1 4W R724 1 249 923 11 CARBON 1K 5 1 4W F R725 1 249 419 11 CARBON 1 5K 5 1 4W R726 1 249 419 11 CARBON 1 5K 5 1 4W R727 1 249 419 11 CARBON 1 5K 5 1 4W R728 1 249 407 11 CARBON 150 5 1 4W R729 1 249 408 11 CARBON 180 5 1 4W R730 1 249 408 11 CARBON 180 5 1 4W R731 1 247 807 31 CARBON 100 5 1 4W R732 1 247 807 31 CARBON 100 5 1 4W R733 1 247 807 31 CARBON 100 5 1 4W R734 1 247 739...

Page 35: ...009 11 CERAMIC CHIP 0 001MF 10 50V C08 1 163 231 11 CERAMIC CHIP 15PF 5 50V C09 1 164 004 11 CERAMIC CHIP 0 1MF 10 25V C10 1 164 004 11 CERAMIC CHIP 0 1MF 10 25V C11 1 164 004 11 CERAMIC CHIP 0 1MF 10 25V C12 1 164 004 11 CERAMIC CHIP 0 1MF 10 25V C13 1 163 009 11 CERAMIC CHIP 0 001MF 10 50V C14 1 216 295 91 SHORT 0 C15 1 126 966 11 ELECT 33MF 20 35V C16 1 126 963 11 ELECT 4 7MF 20 50V C17 1 164 0...

Page 36: ... 1 10W R28 1 216 025 91 RES CHIP 100 5 1 10W R29 1 216 025 91 RES CHIP 100 5 1 10W R30 1 216 071 00 RES CHIP 8 2K 5 1 10W R31 1 216 025 91 RES CHIP 100 5 1 10W R32 1 216 071 00 RES CHIP 8 2K 5 1 10W R33 1 216 065 91 RES CHIP 4 7K 5 1 10W R34 1 216 065 91 RES CHIP 4 7K 5 1 10W R35 1 216 065 91 RES CHIP 4 7K 5 1 10W R36 1 216 025 91 RES CHIP 100 5 1 10W R37 1 216 049 91 RES CHIP 1K 5 1 10W R38 1 260...

Page 37: ...1772 1 249 432 11 CARBON 18K 5 1 4W R1774 1 215 912 11 METAL OXIDE 150 5 3W F R1775 1 249 417 11 CARBON 1K 5 1 4W F R1776 1 249 432 11 CARBON 18K 5 1 4W R1777 1 249 438 11 CARBON 56K 5 1 4W R1778 1 249 430 11 CARBON 12K 5 1 4W R1779 1 249 414 11 CARBON 560 5 1 4W R1780 1 249 418 11 CARBON 1 2K 5 1 4W R1781 1 249 410 11 CARBON 270 5 1 4W R1782 1 249 384 11 CARBON 1 8 5 1 4W F R1784 1 247 807 31 CAR...

Page 38: ...K REF NO PART NO DESCRIPTION REMARK The components identified by shading and mark are critical for safety Replace only with part number specified 9 965 684 01 English 98EM70183 1 Printed in Malaysia 1998 5 Sony Corporation Display Company TV Display Business Asia ...

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