MODELS N9902-1 COLOR MONITOR SERVICE MANUAL Better Service Better Reputation Better Profit MODELS: MultiSync V920 MultiSync V921-1 MultiSync 95 AccuSync 90 AccuSync 90 M (N9902-1 Series Model) /MITSUBISHI NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS...
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W A R N I N G The SERVICE PERSONNEL should have the appropriate technical training knowl- edge and experience necessary to : Be familiar with specialized test equipment, and Be careful to follow all safety procedures associated with high voltage CRT circuit designs to minimize danger to themselves and their coworkers.
CONTROLS – SELECT RESET On-screen display control buttons on the front of the monitor Function as follows: SELECT Enters and exits the OSD menu and decides the icon. CONTROL − / + Selects one of the controls and increases or decreases the adjustment.
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Increases or decreases the curvature of the sides either to the left or right. Rotates the entire display clockwise or counterclockwise. Degauss Control: Eliminates the buildup of stray magnetic fields that alter the correct scan of the electron beams and affect the purity of the screen colors, focus and convergence.
SERIAL NUMBER INFORMATION Refer to the serial number information shown below. SERIAL NUMBER LABEL MODEL N9902 SERIAL No. Manufactured Year : ( Last digit ) Manufactured Month : January to September 1 to 9 October 00001 ~ on ward November (Start from 00001 ~ when December month is changed.)
DISASSEMBLY • Before you disassemble the set, turn off power and pull out the power plug. • Use a proper screwdriver. If you user screwdriver that does not fit, you may damage the screws. • Disassembly is the opposite process of assembly. •...
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 (H) Automatic Alignment System (I) DDC test fixture (2) TIMING TABLE(FACTORY MODE -16 MODES) MODE RESOLUTION H-SYNC EREQ.
(5) FREE RUN Adjustment (A) MODE: 30kHz 70Hz (B) Make TP6 to be short to the ground, and adjust VR306 to make the picture to the normal position. (6) H.V. Adjustment: (A) MODE: 90.1kHz 110Hz (B) PATTERN: ALL BLACK(Brightness cut off) (C) Adjustment: Adjust VR302 to make the high voltage has 25.8+0.2KV (7) X-RAY test: (A) MODE: 90.1kHz 110Hz...
(C) Contrast control set to Max and brightness control set to the center, adjust R.G.B. GAIN standard as below 9300K x = 0.283 + 0.010 y = 0.297 + 0.010 Y = 155 + 5 cd/m² 7500K x = 0.300 + 0.010 y = 0.315 + 0.010 Y = 155 + 5 cd/m²...
(19) TIMING TABLE P re s e t M o d e N o . V G A V G A V E S A V E S A V E S A (M A C ) 6 4 0 *4 0 0 6 4 0 *4 8 0 6 4 0 *4 8 0 6 4 0 *4 8 0...
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P re s e t M o d e N o . V E S A V E S A V E S A V E S A V E S A V E S A 8 0 0 *6 0 0 1 0 2 4 *7 6 8 1 2 8 0 *1 0 2 4 1 0 2 4 *7 6 8 1 2 8 0 *1 0 2 4 1 2 8 0 *1 0 2 4 S ig n a l N a m e (8 5 )
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P re s e t M o d e N o . V E S A V E S A 1 6 0 0 *1 2 0 0 1 0 2 4 *7 6 8 F R E E H .C E N T S ig n a l N a m e (7 5 ) (6 0 )
Write and Inspection for Plug and Play Communication 1. C onstruction of System This system should be connected as shown below. Program Disk Monitor Signal Cable Fixture Power Cable Note: PC clock speed should be below 266MHz. OS is PC-DOS. Fixture Board can be connected directly to PC without Printer Cable.
3. EDID data file (1) N9902-1 EDID Serial No. Format MultiSync V920 Week of Manufacture (Month*4) Year of Manufacture Serial No Area 9bytes Check Sum (2) Bar Code Format(code39) Digit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18...
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4. EDID File Difference List 1) MultiSync V921 EDID Serial No. Format Week of Manufacture (Month*4) Year of Manufacture 00 FF FF FF FF FF FF 00 38 A3 C2 5D 01 01 02 0C 25 1B 78 EA 22 28 A1 54 48 4C FF FF 80 4F 81...
TROUBLE SHOOTING Refer to User’s Manual trouble shooting section before using this chart. TABLE OF CONTENTS Page 1.NO OPERATION, POWER LED FLASH ..................18 2.NO OPERATION, POWER LED OFF ................... 19 3.VIDEO NOISE, UNSYNCHRONOUS .................... 20 4 . NO VIDEO ........................... 21 5.NO RASTER ..........................
2. NO OPERATION, POWER LED OFF POWER SW TURN OFF CHECK F101 CHECK Q101 DC P/S O/P VOLTAGE SET AT 17V,CURRENT SET AT 200MA. POSITIVE CONNECT TO C109”+”. NEGATIVE CONNECT TO C105”-“. SCOPE SET AT 10V/DIV, 10US/DIV, PROBE CONNECT TO Q101-GATE AND C105”-“. CHECK U101 CHECK...
3. VIDEO NOISE, UNSYNCHRONOUS CHECK Q101 G-S FREQUENCY SYNCRONIZE CHECK C114, R116 CHECK HORIZONTAL D109, R115, R117 FREQUENCY C114 TO GND WITH H-SYNC CHECK Q312 FREQUENCY SYNCRONIZE CHECK U301 WITH H-SYNC NORMAL OPERATION...
4. NO VIDEO NO VIDEO CHECK REFER SCREEN CONTROL NO RASTER CLOCKWISE CHECK TROUBLE IN U201 PIN 2, 6, 11 R/G/B SIGNAL, SIGNAL LEVEL SIGNAL CABLE CHECK TROUBLE IN U201 U201 PIN 29, 32, 35 CLAMP(PIN 19) SIGNAL LEVEL U201 12V VOLTAGE CHECK TROUBLE IN U203 U203 PIN 1, 3, 5...
6. TROUBLE IN H. V SYNC TROUBLE IN HOR. OR VER. SYNC CHECK TROUBLE IN CONNECTOR S701 (PIN6,7), SIGNAL SIGNAL CABLE CHECK TROUBLE IN U701(PIN 39,40) H/V SYNC LINE & H/V SYNC. Q701, Q702 SIGNAL CHECK CHECK TROUBLE IN U701(PIN 32,33) U701(PIN 5) 5V LINE H/V SYNC.
Power Supply (a) The filter network consists of L104, C101, C107, L101, L102, C103 and C104. The main function of this filter circuit is to eliminate the noise that is produced from monitor itself. (b) T101 is an energy converter which transfers the energy from primary winding to secondary load. R105, C112 and D105 are the snubber circuit and they function to absorb the spike to protect Q101.
Mode State Input Output Sync Sync Mute User Pulses Pulses Pulse Pulse Depend on fH Stand By No pulses Pulses Suspend Pulses No pulses PMS_OFF No pulses No pulses Factory Pulses Pulses Pulses Pulses Depend on fH Stand By No pulses Pulses Suspend Pulses...
(c)Horizontal linearity compensation circuit: (1)The main component is that L303 is Linearity coil and L302 is choke, when the horizontal < 52K only L301 on and L302 off, when the horizontal > 52K, L301, L302 all on. Compensation circuit is consists of L301, L302, RL301 and Q322.
MultiSync V921-1 Different Parts List ASSY CODE PART NO DESCRIPTION LOCATION Q'TY ALT REMARK 1 BRACKET(PWB)ASSY 12000341 BRACKET(PWB,A) 2 BRACKET(PWB)ASSY 12000351 BRACKET(PWB,BL) 3 BRACKET(PWB)ASSY 12000361 BRACKET(PWB,BR) 4 BRACKET(PWB)ASSY 12000371 BRACKET(PWB,C) 5 BRACKET(PWB)ASSY 12000381 BRACKET(PWB,D) 6 BRACKET(PWB)ASSY 14000071 SCREW (PL-CPTS*3*8*15BF) 7 CABINET FRONT ASSY 10100981 CABINET FRONT 8 CABINET FRONT ASSY...
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53 SET ASSY 18000351 FIXED CABLE CLIP(GL-140A) 54 SET ASSY 80005391 SINGLE CABLE 1.8m D-SUB(BLUE) 55 SET ASSY 14300031 SCREW (PL-CPIMS*4*10*15BF) 56 SET ASSY 18000241 CABLE CLIP(L=100) 57 SET ASSY 18000261 ANODE CLAMPER(SPA-11G) 58 SET ASSY 14600011 SCERW SPECIAL(5*25) 59 SET ASSY 14800011 SPECIAL WASHER(D20,M6,T2) 60 SET ASSY...
AccuSync 90M Different Parts List ASSY CODE PART NO DESCRIPTION LOCATION Q'TY ALT REMARK 1 AUDIO BASE ASSY 80006011 AUDIO SIGNAL CABLE CABLE 2 AUDIO BASE ASSY 80005891 WIRE UL1015AWG22 L150mm BLUE CN-AC1 3 AUDIO BASE ASSY 80005901 WIRE UL1015AWG22 L150mm BROWN CN-AC1 4 AUDIO BASE ASSY 80005871...
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106 SET ASSY 18000361 HOLDER,PCB 107 SET ASSY 80005391 SINGLE CABLE 1.8m D-SUB(BLUE) 108 SET ASSY 10100951 CABINET FRONT ASSY 109 SET ASSY 10100812 CABINET BACK 110 SET ASSY 11000261 REVOLVING STAND (T) 111 SET ASSY 14600011 SCERW SPECIAL(5*25) 112 SET ASSY 14800011 SPECIAL WASHER(D20,M6,T2) 113 SET ASSY...