NEC N9902 F-1 Service Manual Download Page 44

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636 MAIN BOARD A/I

R0319117

JUMPER WIRE AI/T 20mm

637 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J70

638 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

J71

639 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J72

640 MAIN BOARD A/I

R0319115

JUMPER WIRE AI/T 15mm

J73

641 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

J74

642 MAIN BOARD A/I

R0319113

JUMPER WIRE AI/T 10mm

J75

643 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

J76

644 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

J77

645 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J78

646 MAIN BOARD A/I

R0319113

JUMPER WIRE AI/T 10mm

J79

647 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

648 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J80

649 MAIN BOARD A/I

R0319117

JUMPER WIRE AI/T 20mm

J81

650 MAIN BOARD A/I

R0319116

JUMPER WIRE AI/T 17.5mm

J82

651 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J83

652 MAIN BOARD A/I

R0319113

JUMPER WIRE AI/T 10mm

J84

653 MAIN BOARD A/I

R0319113

JUMPER WIRE AI/T 10mm

J85

654 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J86

655 MAIN BOARD A/I

R0319113

JUMPER WIRE AI/T 10mm

J87

656 MAIN BOARD A/I

R0319116

JUMPER WIRE AI/T 17.5mm

J88

657 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

J89

658 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

659 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J90

660 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J91

661 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J92

662 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

J93

663 MAIN BOARD A/I

R0319116

JUMPER WIRE AI/T 17.5mm

J94

664 MAIN BOARD A/I

R0319116

JUMPER WIRE AI/T 17.5mm

J95

665 MAIN BOARD A/I

R0319112

JUMPER WIRE AI/T 7.5mm

J96

666 MAIN BOARD A/I

R0319116

JUMPER WIRE AI/T 17.5mm

J97

667 MAIN BOARD A/I

R0319116

JUMPER WIRE AI/T 17.5mm

J98

668 MAIN BOARD A/I

R0319117

JUMPER WIRE AI/T 20mm

J99

669 MAIN BOARD A/I

R0319113

JUMPER WIRE AI/T 10mm

JP1

670 MAIN BOARD A/I

R0319111

JUMPER WIRE AI/T 5mm

L107

671 MAIN BOARD A/I

R0319111

JUMPER WIRE AI/T 5mm

L109

672 MAIN BOARD A/I

R0319114

JUMPER WIRE AI/T 12.5mm

L303

673 MAIN BOARD A/I

HB013561

PACKING COIL/T 560uH K(EC24)

L305

674 MAIN BOARD A/I

HB003101

PEACKING COIL/T 100uH

L308

675 MAIN BOARD A/I

HB003101

PEACKING COIL/T 100uH

L309

676 MAIN BOARD A/I

EAA09456 TR NPN 2SC945P TO-92(T)

Q102

677 MAIN BOARD A/I

80003231

TR NPN KTC945-P TO-92(T)

Q102

678 MAIN BOARD A/I

80005251

TR NPN KSP44 TO-92(T)

Q103

679 MAIN BOARD A/I

EAA09456 TR NPN 2SC945P TO-92(T)

Q105

680 MAIN BOARD A/I

80003231

TR NPN KTC945-P TO-92(T)

Q105

681 MAIN BOARD A/I

EAA09456 TR NPN 2SC945P TO-92(T)

Q107

682 MAIN BOARD A/I

80003231

TR NPN KTC945-P TO-92(T)

Q107

683 MAIN BOARD A/I

EBA04230 TR PNP BF423 TO-92(T)

Q108

684 MAIN BOARD A/I

EAA09456 TR NPN 2SC945P TO-92(T)

Q109

685 MAIN BOARD A/I

80003231

TR NPN KTC945-P TO-92(T)

Q109

686 MAIN BOARD A/I

EAA09456 TR NPN 2SC945P TO-92(T)

Q110

687 MAIN BOARD A/I

80003231

TR NPN KTC945-P TO-92(T)

Q110

688 MAIN BOARD A/I

EAA09456 TR NPN 2SC945P TO-92(T)

Q111

Summary of Contents for N9902 F-1

Page 1: ...MODELS N9902 F 1 MultiSync 95F 1 AccuSync 95F 1 COLOR MONITOR SERVICE MANUAL Better Service Better Reputation Better Profit MITSUBISHI NEC MITSUBISHI ELECTRIC VISUAL SYSTEMS...

Page 2: ...concerning the operation and maintenance of this unit has been included Therefore it should be read carefully in order to avoid any problems PRODUCT SAFETY CAUTION 1 When parts replacement is required...

Page 3: ...UMBER INFORMATION 4 DISASSEMBLY 5 ADJUSTMENT SPECIFICATIONS 6 TROUBLE SHOOTING 16 THEORY OF CIRCUIT DESCRIPTION 25 REPLACEMENT PARTS LIST 1 MultiSync 95F 29 2 AccuSync 95F Difference List 54 BLOCK DIA...

Page 4: ...105 Hz 1152 870 55 to 105 Hz 1280 1024 55 to 90 Hz 1600 1280 55 to 76 Hz Some systems may not support all modes listed NMV cites recommended resolution at 85 Hz for optimal display performance Active...

Page 5: ...background R Red Color Control Adjust the red contrast of the display G Green Color Control Adjust the green contrast of the display B Blue Color Control Adjust the blue contrast of the display Moves...

Page 6: ...e allows a minimum of 20 minutes to elapse between uses of the Degauss Control 9300 This color setting is adjusted at the factory to the stated Kelvin OSD There are 3 background color blue black and w...

Page 7: ...01 when month is changed It doesn t have meaning specially 4 SERIAL NUMBER INFORMATION Refer to the serial number information shown below Manufactured Year Last digit Manufactured Month January to Sep...

Page 8: ...ew like a picture 2 Disconnect the GND wire CRT coating earth wire from MAIN BOARD ASSY and CRT BOARD ASSY This model has three kinds of CRT Depend on CRT the GND wire assembly is some different Be ca...

Page 9: ...djustment 8 11 G2 Voltage Adjustment Raster Brightness Adjustment 8 12 Focus Adjust 9 13 Convergence Adjust 9 14 Automatically Adjust 9 15 White Balance Adjustment 9 16 White Balance Check and ABL Adj...

Page 10: ...T 90 1kHz 85Hz 7 N9902 Adjustment Specifications 1 Adjustment tools A Color Analyzer B CHAROMA 2135 or Function Generator C Multi meter D Hi Pot Probe E Convergence Meter F Degauss Probe G Power Meter...

Page 11: ...SHATCH C Adjustment Adjust VR301 to make raster is centrally on CRT 9 H size Adjustment A MODE 53 7kHz 800 600 85 B PATTERN CROSSHATCH C Adjust H SIZE OSD set to Max then adjust VR305 to make the full...

Page 12: ...spec if can not follow the spec adjust Yoke coil to make be follow the spec 14 Automatically adjust Adjust H SIZE V SIZE H PHASE V PHASE PINCUSHION TRAPEZOID R G B GAIN by factory product line automat...

Page 13: ...ntrast max position to E condition Adjust R G B GAIN to be 6500K color due to about spec G Adjustment Brightness control and contrast control set to Max adjust VR303 to Y 29 31FT L 103 3cd m 17 POWER...

Page 14: ...nc Pulse dot 96 96 64 56 80 64 uS 3 18 3 813 2 032 1 556 1 616 1 117 Back dot 48 48 120 80 160 224 uS 1 91 1 907 3 810 2 222 3 232 3 910 Total H 449 525 500 509 625 667 m S 14 268 16 683 13 333 11 764...

Page 15: ...444 0 508 0 119 0 406 S ync dot 64 96 112 96 144 160 uS 1 138 1 219 1 037 1 016 1 067 1 016 Back dot 152 176 248 208 248 224 uS 2 702 2 235 2 296 2 201 1 873 1 422 Total H 631 800 1066 808 1066 1072 m...

Page 16: ...16 0 37 0 631 0 406 S ync dot 192 136 64 160 uS 0 948 2 09 2 536 1 016 Back dot 304 160 120 224 uS 1 501 2 46 4 754 1 422 Total H 1250 806 432 1072 m S 13 333 16 667 14 376 11 761 Disp H 1200 768 400...

Page 17: ...ly to PC without Printer Cable 2 EDID Write and Inspection Method 1 Run specified EDID write and Inspection program on PC DOS mode The monitor turns into the self test mode 2 Run the specified EDID wr...

Page 18: ...t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Format N N N N N N N N _ Y M S S S S S F R Example N A 5 0 0 0 8 T _ 0 6 0 0 0 0 1 Y A 15 3 EDID data file 1 EDID Serial No Format 1 MS95F 1 Week of Manu...

Page 19: ...shooting section before using this chart TABLE OF CONTENTS Page 1 NO OPERATION POWER LED FLASH 17 2 NO OPERATION POWER LED OFF 18 3 VIDEO NOISE UNSYNCHRONOUS 19 4 NO VIDEO 20 5 NO RASTER 21 6 TROUBLE...

Page 20: ...17 POWER LED FLASH POWER SW TURN OFF POWER SW TURN OFF MULTIMETER TEST Q315 Q312 D114 D110 D111 D112 D113 1 NO OPERATION POWER LED FLASH...

Page 21: ...O C109 NEGATIVE CONNECT TO C105 2 SCOPE SET AT 10V DIV 10US DIV PROBE CONNECT TO Q101 GATE AND C105 POWER SW TURN OFF CHECK F101 CHECK Q101 CHECK U101 U101 PIN6 PULSE O P POWER SW TURN ON FAILURE R111...

Page 22: ...EQUENCY C114 TO GND CHECK Q312 FREQUENCY SYNCRONIZE WITH H SYNC CHECK U301 NORMAL OPERATION CHECK Q101 G S FREQUENCY SYNCRONIZE WITH H SYNC CHECK C114 R116 D109 R115 R117 YES YES NO NO NO 3 VIDEO NOIS...

Page 23: ...29 32 35 SIGNAL LEVEL TROUBLE IN U201 CLAMP PIN 19 U201 12V VOLTAGE YES CHECK U203 PIN 1 3 5 SIGNAL LEVEL CHECK CATHODE VIDEO LEVEL TROUBLE IN CRT YES YES TROUBLE IN U203 R220 R240 R260 NO TROUBLE IN...

Page 24: ...K G1 VOLTAGE ABOUT 45 65V TROUBLE IN G2 VOLTAGE YES YES TROUBLE IN Q331 Q323 Q329 R394 D314 T302 C328 U701 NO NO CHECK T302 PIN 3 VOLTAGE 57V AT 31 5KHz 172V AT 93 7KHz TROUBLE IN U301 Q312 D317 D111...

Page 25: ...OUBLE IN H V SYNC LINE Q701 Q702 CHECK U701 PIN 32 33 H V SYNC SIGNAL CHECK U701 PIN 5 VOLTAGE 5V TROUBLE IN 5V LINE YES NO YES YES YES CHECK U701 PIN 1 2 TROUBLE IN U301 YES YES NO NO NO CHECK U701 P...

Page 26: ...PINCUSHION PARABOLA WAVE CHECK U301 PIN 24 PARABOLA TROUBLE IN U301 CHECK C350 Q332 R30V R30W CHECK Q309 Q311 NO NO YES YES YES 23 7 PINCUSHION POOR...

Page 27: ...YES 1 CHECK STATIC FOCUS AND DYNAMIC FOCUS VR LINE TO CRT SOCKET 2 CRT SOCKET OR CRT POOR NO NO CHECK C323 H PARABOLA WAVEFORM 29Vpp CHECK Q303 Q304 EMITTER H PARABOLA 32 Vpp TROUBLE IN T303 TROUBLE...

Page 28: ...uit operation This monitor contains the following blocks Page 1 Power Supply 26 2 Video Circuit OSD 26 3 Micro Controller System 26 4 Vertical Deflection 27 5 Horizontal Deflection 27 6 FBT Secondary...

Page 29: ...lifier IC that controlled by MCU IIC bus for the features of contrast output DC level 3 SUB gain controls R Gain G Gain B Gain b U201 PIN 19 need a positive pulse for clamping and PIN 27 also need a p...

Page 30: ...uspend Pulses No pulses L L Adj data H H H Factory PMS_OFF No pulses No pulses L L Adj data H H H b The U702 is an EEPROM IC which stores the parameters of each mode and the user adjusting result and...

Page 31: ...3 4 controls the Q324 Q326 Q325 and Q327 respectively So different frequency has different combination to meet the requirement 28 6 FBT Secondary Dynamic Focus a Focus and screen voltage are come fro...

Page 32: ...A I 72000591 PCB HARMONIC CNT BOARD PCB2 1 26 CNT BOARD A I EAA09456 TR NPN 2SC945P TO 92 T Q120 1 27 CNT BOARD A I 80003231 TR NPN KTC945 P TO 92 T Q120 OR 28 CNT BOARD A I EBA07336 TR PNP 2SA733P TO...

Page 33: ...I GB7101F3 CERAMIC Y5P B T 100P 500V K C287 1 78 CRT BOARD A I GA322715 ELECT 85oC T 220u 10V M C288 1 79 CRT BOARD A I GA310715 ELECT 85oC T 100u 10V M C289 1 80 CRT BOARD A I GB210458 CERAMIC Y5V T...

Page 34: ...RT BOARD A I R0319113 JUMPER WIRE AI T 10mm J12 1 133 CRT BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J13 1 134 CRT BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J14 1 135 CRT BOARD A I R0319112 JUMPER WIRE...

Page 35: ...CARBON 1 8W T 5 750ohm R215 1 184 CRT BOARD A I FA240101 CARBON 1 4W T 5 100ohm R216 1 185 CRT BOARD A I FA040102 CARBON 1 8W T 5 1K R217 1 186 CRT BOARD A I FA040224 CARBON 1 8W T 5 220K R218 1 187 C...

Page 36: ...BOARD A I FA040103 CARBON 1 8W T 5 10K R289 1 238 CRT BOARD A I FA040103 CARBON 1 8W T 5 10K R290 1 239 CRT BOARD A I FA040100 CARBON 1 8W T 5 10ohm R293 1 240 CRT BOARD A I FA040105 CARBON 1 8W T 5...

Page 37: ...1 291 MAIN BOARD A I GA322735 ELECT 85oC T 220u 25V M C137 1 292 MAIN BOARD A I GA347725 ELECT 85oC T 470u 16V M C141 1 293 MAIN BOARD A I GF210362 MEF CAP BOX 0 01u 63V J C142 1 294 MAIN BOARD A I GA...

Page 38: ...1 343 MAIN BOARD A I GF233362 MEF CAP BOX 0 033u 63V J C327 1 344 MAIN BOARD A I GF233352 MEF CAP BOX 0 033u 50V J C327 OR 345 MAIN BOARD A I GF233372 MEF CAP BOX 0 033u 100V J C327 OR 346 MAIN BOARD...

Page 39: ...396 MAIN BOARD A I GB210458 CERAMIC Y5V T 0 1u 50V Z C402 1 397 MAIN BOARD A I GF210462 MEF CAP BOX 0 1u 63V J C403 1 398 MAIN BOARD A I GF210452 MEF CAP BOX 0 1u 50V J C403 OR 399 MAIN BOARD A I GF21...

Page 40: ...306 1 448 MAIN BOARD A I EJ044148 DIODE T 1N4148 D307 1 449 MAIN BOARD A I EJA00018 DIODE T 1A UF4006 D308 1 450 MAIN BOARD A I EJA20003 DIODE T 1A BA159 D309 1 451 MAIN BOARD A I EJA20003 DIODE T 1A...

Page 41: ...7 5mm J124 1 502 MAIN BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J125 1 503 MAIN BOARD A I R0319113 JUMPER WIRE AI T 10mm J126 1 504 MAIN BOARD A I R0319114 JUMPER WIRE AI T 12 5mm J127 1 505 MAIN BOA...

Page 42: ...I T 7 5mm J171 1 555 MAIN BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J172 1 556 MAIN BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J173 1 557 MAIN BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J174 1 558 MAIN...

Page 43: ...ER WIRE AI T 12 5mm J43 1 608 MAIN BOARD A I R0319113 JUMPER WIRE AI T 10mm J44 1 609 MAIN BOARD A I HC006002 BEAD 3 5X4 7 T J45 1 610 MAIN BOARD A I R0319113 JUMPER WIRE AI T 10mm J46 1 611 MAIN BOAR...

Page 44: ...661 MAIN BOARD A I R0319112 JUMPER WIRE AI T 7 5mm J92 1 662 MAIN BOARD A I R0319114 JUMPER WIRE AI T 12 5mm J93 1 663 MAIN BOARD A I R0319116 JUMPER WIRE AI T 17 5mm J94 1 664 MAIN BOARD A I R031911...

Page 45: ...T Q319 OR 714 MAIN BOARD A I EAA09456 TR NPN 2SC945P TO 92 T Q320 1 715 MAIN BOARD A I 80003231 TR NPN KTC945 P TO 92 T Q320 OR 716 MAIN BOARD A I EAA09456 TR NPN 2SC945P TO 92 T Q321 1 717 MAIN BOAR...

Page 46: ...ARD A I FA240154 CARBON 1 4W T 5 150K R113 1 767 MAIN BOARD A I FA240390 CARBON 1 4W T 5 39ohm R115 1 768 MAIN BOARD A I FA330271 CARBON 1 2W T 5 270ohm R116 1 769 MAIN BOARD A I FA240470 CARBON 1 4W...

Page 47: ...N 1 8W T 5 1K R30D 1 820 MAIN BOARD A I FA040682 CARBON 1 8W T 5 6 8K R30E 1 821 MAIN BOARD A I FA040472 CARBON 1 8W T 5 4 7K R30F 1 822 MAIN BOARD A I FA040302 CARBON 1 8W T 5 3K R30G 1 823 MAIN BOAR...

Page 48: ...W T 5 12K R32M 1 873 MAIN BOARD A I FA040104 CARBON 1 8W T 5 100K R32N 1 874 MAIN BOARD A I FA040472 CARBON 1 8W T 5 4 7K R32P 1 875 MAIN BOARD A I FA330474 CARBON 1 2W T 5 470K R32R 1 876 MAIN BOARD...

Page 49: ...T 5 10K R382 1 926 MAIN BOARD A I FA040100 CARBON 1 8W T 5 10ohm R384 1 927 MAIN BOARD A I FA040103 CARBON 1 8W T 5 10K R388 1 928 MAIN BOARD A I FA040104 CARBON 1 8W T 5 100K R389 1 929 MAIN BOARD A...

Page 50: ...040472 CARBON 1 8W T 5 4 7K R746 1 980 MAIN BOARD A I FA040472 CARBON 1 8W T 5 4 7K R747 1 981 MAIN BOARD A I FA040472 CARBON 1 8W T 5 4 7K R748 1 982 MAIN BOARD A I FA040472 CARBON 1 8W T 5 4 7K R749...

Page 51: ...u 250V J C346 1 H 1032 MAIN BOARD INSERT GFB47482 PLASTIC MPP A 0 47u 250V J C346 1 S 1033 MAIN BOARD INSERT GFB12482 PLASTIC MPP A 0 12u 250V J C347 1 H 1034 MAIN BOARD INSERT GFB22482 PLASTIC MPP A...

Page 52: ...RT 80005311 CHIKE 30uH N9902 N9702 L302 1 1085 MAIN BOARD INSERT HB000019 CHOKE COIL 130uH 18X20 L304 1 S 1086 MAIN BOARD INSERT 80007011 CHOKE COIL 150uH 18X20 L304 1 H 1087 MAIN BOARD INSERT 8000920...

Page 53: ...ERT FC110228 WOUND RES 2W A 5 0 22ohm R111 1 1138 MAIN BOARD INSERT FB470103 MOF 1W M A 5 10K R114 1 1139 MAIN BOARD INSERT FB470153 MOF 1W M A 5 15K R122 1 1140 MAIN BOARD INSERT FB470100 MOF 1W M A...

Page 54: ...MAIN BOARD INSERT 80003631 THERMISTOR PTCR 9ohm 2P DGC2R9ROM27C TH102 1 1191 MAIN BOARD INSERT R0224074 SINGLE PIN L 11 5mm D 1 0 TP1 1 1192 MAIN BOARD INSERT R0224074 SINGLE PIN L 11 5mm D 1 0 TP2 1...

Page 55: ...DEGAUSSING 1 1241 SET ASSY HA030010 EMI FILTER COIL 20 10 10 FBT G2 1 JVC FBT 1242 SET ASSY HA030010 EMI FILTER COIL 20 10 10 FBT G4 1 JVC FBT 1243 SET ASSY 80011321 WIRE BRAIDED 0 12 120C 180mm FBT C...

Page 56: ...4 1281 SET ASSY 14800011 SPECIAL WASHER D20 M6 T2 4 1282 SET ASSY 18000271 SPACER SUPPROT PS 26GD 4 1283 SET ASSY 14000011 SCREW 2CBRITS 4 16 15BF 6 1284 SET ASSY R0315A04 CABLE TIE L 100mm W 2 5mm 8...

Page 57: ...0251 REVOLVING STAND B 1 25 REVOLVING STAND ASSY 11000261 REVOLVING STAND T 1 26 REVOLVING STAND ASSY 17000291 CUSHION SHEET 4 27 SET ASSY 80001631 POWER CORD 3P 1 8M NON SHIELD W COLOR SG8508 CORD PO...

Page 58: ...MAYLAR SHEET D18 T2 2 64 SET ASSY 14600011 SCERW SPECIAL 5 25 4 65 SET ASSY 14800011 SPECIAL WASHER D20 M6 T2 4 66 SET ASSY 18000271 SPACER SUPPROT PS 26GD 4 67 SET ASSY 14000011 SCREW 2CBRITS 4 16 1...

Page 59: ...T303 Q301 Q317 BRIGHTNESS CONTROL Q329 Q323 VR304 Horizontal Driver Output T301 Q315 Q316 High Voltage Generator T302 G2 G4 2 H DY Video Pre AMP U201 R G B Input OSD Process U202 H H V V AC Input Micr...

Page 60: ...Y5P 01u C340 R374 1 4W 1K D319 1N4936 R341 51K 8 7 6 5 4 3 2 1 NC NC NC NC SDL SCL WP VCC 24C04 U702 C329 250V MEF 0 1u D317 RG4A C945 Q322 R422 22K C310 NC R158 220 C603 Y5P 0 01u R397 100K R753 4 7...

Page 61: ...214 56 R272 56K R284 1K R298 100 JP1 S274 2 1 R276 100 C277 1u NC C279 NC C278 R299 100 R275 100 8 1 S272 R297 5 6K R296 6 8K R295 5 6K C280 100P SL FOCUS 8 6 4 5 3 9 7 KB KG KR CRT G1 G2 H V C271 N C...

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