Samsung ML467 series, Service Manual

Page 1: ...SERVICE MANUAL VGA MONO MONITOR ML467 ML267...

Page 2: ...STRUCTION 9 BLOCK DIAGRAM 10 ADJUSTMENT METHOD 11 ALIGNMENT INSTRUCTIONS 12 TROUBLE SHOOTING 13 16 PRINTED CIRCUIT BOARD 17 18 WIRING DIAGRAM 19 EXPLODED VIEW 20 23 REPLACEMENT PARTS LIST 24 32 SEMICO...

Page 3: ...e specification MODEL CRT size Face radius Remark ML2671 12 1200mm ML4671 14 1524mm 2 Deflection angle 90 Implosion protection Shrinkage band with mounting lug Phosphor WD paper white Face Direct etch...

Page 4: ...X radiation is capable of penetrating the shell of the picture tube including the lead in glass material The important precaution is to keep 3 the high voltage below the maximum level specified 2 It...

Page 5: ...hafts escutcheon etc and measure the AC voltage drop across the resistor Any reading of 0 3volt RMS this corresponds to 0 5milliamp AC or more is excessive and indicates a potential shock hazard which...

Page 6: ...pin 3 of IC302 and flyback pulse into pin 4 These two signals are compared and the circuit is locked to a correct frequency and phase 5 1 3 Horizontal output stage 0305 0305 is a horizontal output sw...

Page 7: ...ached to the main chassis frame When replacing the fuse make sure that the fuse is of the same type and rating as the original NOTE The adjustment requires the connection of a per sonal computer to th...

Page 8: ...MAJOR OPERATING COMPONENTS t POWER SWITCH POWER INDICATOR Push the power switch to tum the unit ON When the monitor Is on the power Indicator Green wUI light go on Turning this control adjusts the ov...

Page 9: ...ERATING COMPONENTS r POWER SWITCH POWER INDICATOR Push the power switch to turn the unit ON 10 0 01 I SIGNAL CABLE f POWER CORD When the monitor is on the power indicator Green will light go on Turnin...

Page 10: ...ischarge procedure for important safety precau tions 2 Remove the CRT s anode cap a from the CRT 3 Disconnect the ground lead and remove the PWB CRT v I 1 FIG 1 j EfJJ lj L 1 MATERIAL STEEL PLATE 9 fr...

Page 11: ...0104 t CONTRAST BRIGHTNESS VR 102 VR502 o Y VE R T DRIVE 8 OUTPUT I C 2 0 I L20l L301 HORZ nI I I I I I CRT I I I 14 12 I I I CRT CONTROL CIRCUIT 0501 F B T r r HORZ O SYNC HORZ DRIVE 0303 0304 I C30...

Page 12: ...efer to the page 4 A same condition V SIZE1 MODE3 as the adjustment 2 VR203 A same sequence method sequence 4 V SIZE2 7 1 MODE2 3 VR204 A same sequence V SIZE3 7 1 MODE1 8 CENTERING CENTERING MAGNET A...

Page 13: ...ations IC301 IC302 o OVR301 H HOLD T301 J VR401 IC201 I I VR501 FOCUS I I C VR503 C SUB BRIGHT Q305 OC24V CONTROL IC401 12 VR204 D MODE V SIZE I VR203 D M0 2DE V SIZE VR202 V SIZE VR205 V LIN D D VR20...

Page 14: ...401 C402 C403 YES YES I CheckT401 I Does 24V appear between NO Does 38V appear between NO Check 0401 4 J401 and ground the 1 pin of 1C401 and C404 C405 ground Check 1C401 0405 YES YES L401 C411 C412 C...

Page 15: ...tween the anode I CheckT302 I of CRT and ground YES Does 600V appear NO Does 650Vp p flyback pulse NO I I between the 6 pin appear between the 9 pin CheckT302 of CRT and ground of T302 and ground YES...

Page 16: ...pear between NO Check R125 0104 appear at the 8 pin of the 14 pin of IC101 C103 C104 IC101 and ground YES I Does 4 5Vp p flyback pulse NO Check R313 R314 appear at the 12 pin of IC101 0302 YES IC101 Y...

Page 17: ...ES I Does proper horz sync NO Check IC301 0303 R303 signal appear at the 3 R304 R305 C302 D530 pin of IC302 R530 C530 C531 YES Check IC302 VR301 R322 C305 C306 C311 C312 5 BLANKING FUNCTION DEFECT I N...

Page 18: ...p e BOARD VIEWS Main PCB Top View 17...

Page 19: ...Top View Bottom View Video PCB Power PCB CAUTION CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE ONLY WITH SAME TYPE AND SAME RATING 18...

Page 20: ...I020F VR502 VRI02 WHITE WIRING DIAGRAM BLACK ___ CrRT WHITE BLUE SHIELD YELLOW BLACK FILTER PCB BLACK WHITE EUROPE VERSION Af 1 WHITE BRN WHITE WHITE BLU BLACK COAX ALI BLACK SHIELD GND BLACK m SIGNAL...

Page 21: ...ITCH PUSH 16 7048 130 031 15 7622 701 510 SCR W RH 14 M904 000 4020 KNOB VR 13 7154 230 0 ASSY PCB CRT 12 5684 706 318 SCREW TAP PH II 4042 706 110 HEATSINK VIDE O 10 6460 700 210 SHIELD VIDEO 9 M9Q4...

Page 22: ...H 2S 3X8 FE FZY 26 7148 530 081 SCREW TAP RH 2S 3X8 FE FZY I 2 5 21 19 60 1 900 IC POWER L4960 SGSJ I 24 7154 230 081 SCREW TAP PH 2S 3X8 FE FZY W WASHER 5 23 M904 000 4000 ASSy pee MAIN ML 4671A 2256...

Page 23: ...C CERAMIC HK CK45 T F50V 0 1 M Z C205 1609 401 720 C ELECTROLYTIC CE04W 25V 1000M C206 1609 402 100 C ELECTROLYTIC CE04W 35V 100M C207 1505 724 332 C POLYESTER C0921 M T 100V 0 0033 K C208 1517 383 10...

Page 24: ...417 318 331 C CERAMIC HK CK4S T B SOV 330 K C409 1S05 723 103 C POLYESTER CQ921M T 100V 0 01 J C411 1603 90S 471 C ELECTROLYTIC CE04W 3SV 470M C412 1603 90S 471 C ELECTROLYTIC CE04W 3SV 470M C413 1417...

Page 25: ...B1 T EX BRT 3344 153 010 CONNECTOR PIN BASE B2B XH A JST G1G2G4 3054 614 910 CONNECTOR 3P ASSY JST HOUS 3P SVF 300MM H IC 7108 530 061 SCREW TAP PH 2S 3x6 FE FZV H DY 3344 112 010 CONNECTOR WAFER 5273...

Page 26: ...377 100 R CARBON RD 1 2T 10 J R206 1018 277 563 R CARBON RD 1 4T 56K J R207 1018 277 304 R CARBON RD 1 4T 270K J R208 1018 277 274 R CARBON RD 1 4T 270K J R209 1018 277 125 R CARBON RD 1 4T 1 2M J R2...

Page 27: ...277 331 R CARBON RD 1 2T 330 J R326 1018 277 123 R CARBON RD 1 4T 12K J R327 1018 277 332 R CARBON RD 1 4T 3 3K J R328 1018 277 103 R CARBON RD 1 4T 10K J R329 1016 377 829 R CARBON RD 1 2T 8 2 J R330...

Page 28: ...MI CET 117A B200K VR203 1241 110 006 VR SEMI CET 117A B500K VR204 1241 110 006 VR SEMI CET 117A BSOOK VR20S 1241 110 00S VR SEMI CET 117A BSOK VR301 1241 108 003 VR SEMI CET 92A B5K VR401 1241 108 011...

Page 29: ...301 070 TRANSISTOR 2N3904 0103 2149 301 360 TRANSISTOR 2N2369 0104 4543 704 210 SHIELD B VIDEO SPTE TO 306 Q104 5684 706 310 HEAT SINK VIDEO SBC 1 Tl 0 FE FT 2 0104 2149 302 300 TRANSISTOR MPS U06 R10...

Page 30: ...S 23 1 KV S503 4569 001 110 SPARK GAS S 23 1 KV S504 4569 001 110 SPARK GAS S 23 1 KV I SOCKET 3353 700 910 SOCKET CRT 7PIN VIDEO 3344 153 020 CONNECTOR PIN BASE B3B XH A JST VR101 1241 110 004 VR SE...

Page 31: ...5 C C CLR SW401 3529 702 21 0 SWITCH PUSH ESB8213V SW401 0659 422 500 TUBE HISHI U C SUMITUBE F2 DIA3 2 FD5 BLK SW401 3054 648 310 CONN 2P ASSY H YHR 3N L 150M M SW401 3054 617 040 CONNECTOR AC ASSY R...

Page 32: ...omputer with a video signal input at a white pattern with contrast max 2 0 indicates the waveform check points In the chart waveforms are measured from the point indicated to chassis ground 0 MS1392P...

Page 33: ...R2 I S t R2 1 9 C21S _ r R 4NI 0___ _ ___ J __R IS A30 _R 2 10 rS___ _ __ r _02t 0t 3 r C2Bo_s 1 r470 0 C212 2 7K 3 3 168 2 iI R227 10 330 1 2 2 0 1 0 1 CGPIOG I 13 00V U 22 SU V R217 C213 IW o sw sl...

Page 34: ...C withstand voltage V Capacitor type No type display Ceramic and electrolytic capacitor P Polyester capacitor MP Metallized polyester capacitor PS Polystyrene capacitor 36 RMS MEASUREMENT RESULTS OF T...

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Page 36: ...Printed in Korea Code No 8146 400 040...