Related Manuals for Neotec NT-431HR
Summary of Contents for Neotec NT-431HR
-
Page 1: Service Manual
SERVICE MANUAL 14”, 19” VGA S-VGA MONITOR & MODEL: NT-431HR / NT-1438 NT-93lHR / NT-1938 , / ’ NEOTEC GRAPHIC INTERNATIONAL INC. 2721 NORTH T O W N E AVENUE, POMONA, CA 91767 TEL: (909) 626-9889 FAX: (909) 626-0990... -
Page 4: Product Safety Notice
impedance high voltage meter. (SENSITIVE RESEARCH MODEL: ESH or Equivalent). Connect (-)to chassis earth and (+)to the CRT anode button. NOTE: Make sure to turn power switch off before making the connection to the Anode Button. X-RADIATION TUBE: The primary source of X-radiation in this monitor is the picture tube. The tube utilized in this chassis is specially constructed to limited X-radiation emissions. -
Page 5: Signal Connector
MODEL NT-431 HR11438 NT-931HR11938 SIGNAL INPUT 0 7Vpp, 75 OHM, POSITIVE ANALOG 0 7Vpp, 75 OHM, POSITIVE SYNC SEPARATE, i T L LEVEL H8V SYNC, 3 4Vpp+/- SEPARATE, l T L LEVEL HBV SYNC, 3 4Vppii- GENERAL H30-39KH~ 1 V50-90Hz(LINEARITY 10% MAX) SCAN FREQUENCY H30-39KHz V50-90Hz (LINEARIlY... -
Page 6: Final Alignment
FINAL ALIGNMENT B+l Voltage Adjustment: Input 31.5KHz (640 x 480) Crosshatch pattern. Adjust VR601 (B+1 ADJ) to make the pattern of the wave from the negative point of D606 be 24V. B+2 Voltage Adjustment: Adjust VR403 (B+2 ADJ) to make the pattern of the wave from the negative point of D401 be 108 +/- 0.5VDC. - Page 7 Turn VR903, VR904 to the center point. The color temperature should be 281 +/- 20Fi, y 80 - 90FL, 311 +/- 20FL Input 3 1.5KHz (640 x 480) full white pattern. Contrast VR to the maximum. The color temperature Turn Brightness &...
- Page 8 > & >...
- Page 11 &-/ ".OM/q& NEOTEC w a r n BOARD CRT k WOE0 CIRCUIT car- I . . . l u I 1 1 1 1 I I I111 I...
- Page 14 PRE-AMPLIFIER AMPLIFIER X-RAY PROTECTION & v’ PARABOLA VERTICAL DEFLECTION AMPLIFIER GENERATOR CONTROL CONTROL V. CENTER V. SIZE CONTROL CONTROL HORIZONTAL VERTICAL DEFLECTJON BLOCK DJAGRAM &...
- Page 18 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 0010 JOOI JUMPER WIRE 0.6D, 5MIM 83206005000 0020 JOO2 JUMPER WIRE 0.6D, 5MIM 83206005000 0030 J003 JUMPER WIRE 0.6D, 5MIM 83206005000 0040 J004 JUMPER WIRE 06D, 5MIM 83206005000 0050 J005...
- Page 19 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 0520 J052 JUMPER WIRE 0.6D. 7.5MIM 83206007500 0530 J053 JUMPER WIRE 0.6D, 7.5MIM 83206007500 0540 J054 JUMPER WIRE 0.6D, 15MIM 83206015000 0550 J055 JUMPER WIRE 0.6D, 7.5MIM 83206007500 0560 J056...
- Page 20 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 1030 R303 RES. CARBON RD118PY560KJT RDEPY560KJT RES. CARBON 1040 R304 RD118PY56KJT RDEPY56KOJT R308 RES. CARBON RD112PY270HJT 1050 RDHPY270HJT 1060 R309 RES. CARBON RD1/2PY3R3HJT RDHPY3H3OJT 1070 R310 RES. CARBON RD118PY2RZKJT RDEPY2K20JT 1080...
- Page 21 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 1540 R430 RES. METALOXIDE RS2PBR47HJK RS2PBOH47JK 1550 R431 RES. CARBON RD112PY470HJT RDHPY470HJT 1560 R432 RES. CARBON RD112PY4R7HJT RDHPY4H70JT 1570 R433 RES. CARBON RD118PY 1 OKJT RDEPYlOKOOJT 1580 R434 RES.
- Page 22 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 2050 R703 RES. CARBON RD118PYl OOHJT RDEPY 1 OOHJT 2060 R704 RES. CARBON RD118PY330HJT RDEPY330HJT 2070 R705 RES. CARBON RDlBPY3R3KJT RDEPY3K30JT 2080 R706 RES. CARBON RDlBPY3R3KJT RDEPYBKBOJT 2090 R707 RES.
- Page 23 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 2560 C106 CAP. ELEC CE04BlH100MT CE4B1 H I OOMT 2570 C l l l CAP. ELEC CE04B1 H1 OOMT C E4B 1 H 1 OOMT c112 2580 CAP.
- Page 24 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 3070 C423 CAP M.P. CF93P2E104KA CF3P2E104KA 3080 C424 CAP. PP CQ93P2J392JA CQ3P2J392JA 3090 C425 CAP. PP CQ93P3D682KT CQ3P3D682KT 3100 C426 CAP. MYLAR CQ92M1 H103KT CQ2M1 H103KT 31 10 C427 CAP.
- Page 25 ASSEMBLY P W B NAME: MAIN ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 3580 VR705 VER SEMI FIX RVGPBPBlOK RV615B1 OK00 3590 VR706 VER SEMI FIX RVGPBPBlOK RV615BlOK00 3600 VR707 VER SEMI FIX RVGPBPBIOK RV61581 OK00 361 0 T401 COIL CHOKE 180UH DI 16x18...
- Page 26 ASSEMBLY NAME: MAIN PWB ASSY SPEC PART NUMBER NO. LOCATION ITEM NAME ITEM 4080 D605 DIODE SI FR107 DSOOOFR1070 DSOOHER3050 4090 D606 DIODE SI HER305 4100 D607 DIODE S I HER103 DSOOHER1030 4110 D608 DIODE SI HER305 DSOOHER3050 4120 D609 DIODE Sl HER306 DSOOHER3060...
- Page 27 ASSEMBLY NAME: MAIN PWB ASSY NO. LOCATION ITEM NAME ITEM SPEC PART NUMBER 4590 Q404 TRANSISTOR 2SA733 TC002SC9450 4600 Q405 TRANSISTOR 2SC945 TXOOOBF4230 4610 Q406 TRANSISTOR BF423 TCBU2520DFO 4620 HEAT SINK BU2520DF 21 5200100 4630 SCREW TAPPING WS-DMF317XOOH 80PB3008CAO TRANSISTOR TIP122 4640 Q409...