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. P6NS SERIES Service Manual PROVIEW ELECTRONICS CO.,LTD 6F,No.1,Pau-Sheng Road,Yung-Ho City,Taipei 234,Taiwan. Tel: (886-2) 2231-6789, Fax:(886-2) 2231-5678 TABLE OF CONTENTS S E R V I C E W A R N I N G A.

I M P O R T A N T S A F E T Y I N S T R U C T I O N B. Contact the local dealer or the nearest PROVIEW branch office if you need help. IMPORTANT SAFETY INSTRUCTION Prior to using this service manual,please ensure that you have carefully followed all the procedures outlined in the user's manual for this product. For Model 786NS,986NS Series WARNING: This product included critical components which are essential for X-Radiation safety. See service manual for proper replacement.Maximum 2nd anode voltage must not exceed 30KV at any operating conditions. To measure 2nd voltage use high impedance meter connect (-) chassis, use a high voltage lead from (+) to 2nd anode. Visible Image Area 3.

Active Display Area 4. Synchronization Range Horizontal Vertical 5. Power Source 6.

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Power Consumption 7. Input Signal Video Sync. Connection Type 9. Resolution 10. Color Temperature 11. Dimension (W×H×D) 12. Monitor Weight 13.

Visible Image Area 3. Active Display Area 4. Synchronization Range Horizontal Vertical 5. Power Source 6. Power Consumption 7. Input Signal Video Sync.

Connection Type 9. Resolution 10. Color Temperature 11. Dimension (W×H×D) 12. Monitor Weight 13. Visible Image Area 3. Active Display Area 4.

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Synchronization Range Horizontal Vertical 5. Power Source 6. Power Consumption 7. Input Signal Video Sync. Connection Type 9. Resolution 10.

Color Temperature 11. Dimension (W×H×D) 12. Monitor Weight 13.

VESA Preset Modes × × × Dot Rate 25.175 28.322 40.000 (MHz) 31.469 31.469 37.879 (KHz) A- Period 31.778 31.778 26.400 (uS) B- Active 25.422 25.422 20.000 (uS) C- Sync 3.813 3.813 3.200 (uS) D-Back 1.907 1.907 2.200 Porch (uS) E-Front 0.318 0.318. CONTROL LOCATION Font control panel One key type a. Power Switch b.

Power Indicator c.Encoder d. Enhance Key Four key type a. Power Switch b.

Power Indicator c. ADJUSTMENT CONTROL LOCATION IC601 IC901 VR501 L705 Q703 T501 C504 Q504 F501. ADJUSTMENT PROCEDURE ﹟ Test Meter ITEM ﹡ Test Point Program Menu. ﹫ Pattern ﹟ Digital Voltmeter Adjust ﹡ D510 Negative ﹫ Crosshatch Pattern (31.5KHz,640x480) High Voltage ﹟ Digital Voltmeter Adjust ﹟ High Voltage Probe ﹡ Anode Cap-GND ﹫ Crosshatch Pattern (31.5KHz,640x480) Preset ﹫.

ABL on the OSD menu. Set the FREQ. To 55 (562NS) (777NS,772NS,572NS) (786NS,787NS,986NS) 2. Set the OSD to PROVIEW 3. Set the BURN to Disable 4.

Set the TIME to 15 5. Set the DEFO to TDA9113/9112 TDA9115. ﹟ Test Meter ITEM ﹡ Test Point Program Menu. ﹫ Pattern Dynamic ﹟ Oscilloscope Focus ﹡ FBT Pin14 Adjust ﹫ Full White (31.5KHz,640x480) Purity ﹫ Magenta color Adjust (31.5KHz,640x480) Static ﹫ Magenta color Convergence (31.5KHz,640x480) Adjust Operation 1. Set the contrast to MAX.,and adjustment Brightness to the raster just appear. BLOCK DIAGRAM 16 16. TROUBLE SHOOTING HINTS BRIGHT HOR.

LINE APPEAR ON THE SCREEN NO POWER T501 (7) F501,D514, 160 V? D515,D516, D517 IC501 (7) ＞ 14 V? IC501(6) 14Vp-p? D510 (-) 15.5V? CIRCUIT SHORT CHECK CHECK IC501,R539, D505,ZD551 CHECK IC501,Q504. IC301 (2) CHECK LINE 12 V?

IC301 (4) CHECK -12V LINE -12 V? IC301 (1) CHECK IC601 0.7 V IC301 (5) CHECK IC301 48 V CHECK CRT DY. RASTER CRT G1 Q710 (E) -20V -80V? HEATER CHECK VOLT B+ VOLT 6.3 V? CHECK Deflection Horizontal 26KV? CRT G2 CHECK 600V?

T701 FBT VIDEO CKT KR,KG,KB FAILURE VOLTAGE CHECK CRT TUBE IC901(4) -1.5V-1.8V CHECK. DEFLECTIVE HOR. CKT Q703 (C) 1.0 1.2 NO RASTER Q703 (B) DRIVE PULSE Q702 (G) DRIVE PULSE CHECK IC601 CHECK 15V LINE 986N:T701(3) Voltage for each mode T701(3) B+ 31.5KHz 37KHz 48KHz 54KHz 104V 56KHz 111V 64KHz 127V 68KHz 139V 75KHz 153V. OFF MODE NO ROTATION FAILURE IC901(40) CHECK (41) H/V SIGNAL IC901(20) CHECK PS 0 0 V? Q505 (C) CHECK 7.0 V?

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CHECK CHECK Q511 (B) 0 V? CHECK Q511 VESA STANDARD DPMS ITEM MODE NORMAL STAND BY SUSPEND IC901 IC901 PIN40,PIN41 SIGNAL. P903 CHECK OK? Rotation Coil Q902 (c) CHECK 15 V? 15V LINE R979 CHECK 7 V? 7V LINE Q902 (B) CHECK Q903 (B) Q902 1.513V?

Q903 Q904 (B) CHECK 02.5V? IC901 CHECK Q904. NO CHARACTERS OSD DOES NOT MISSING ONE WORK Example:Missing Green COLOR CRT KG RASTER IC203 (3) 39 V IC203 12 V? IC201 (10) 5 V? IC201 (7) CHECK I/P 0.7V IC201 (19) 0.4 V? CHECK IC201 CHECK IC203 CHECK CHECK.

Example: Missing Green Condition: OSD on IC201 (19) IC201(24) OSD G 7V? IC202 (3) CHECK M703 BLK? IC202(6) CHECK 4.2V CHECK D203 I. REPLACEMENT PARTS LIST CHECK IC201. 986NS/787NS/786NS/777NS/772NS/572NS/562NS Spare Parts List Location.

R631 R734 (986NS,787NS,786NS,772NS) (572NS,562NS) R762 R7A2 R612,611,663,912,918,926,927,976 R977 R205,235,265,281,284,285,516,664 R711A,918A,942,943,952,953,982 R984,985 R703 (986NS,787NS,786NS) (772NS) R736 (986NS,787NS,786NS,72NS) (572NS,562NS) R735 (772NS) (572NS,562NS) R525,740,754,7A8 R210,240,270,533,546,626,755,793 R974,993 R991 (986NS,787NS,786NS) (772NS) R529,536,610,983 R288,291,510,590, 606,615, 630, 651 R730,931,947 R710 (986NS,786NS) (787NS,572NS,562NS) (772NS) R724 ( 986NS,787NS,786NS,772NS,572NS. (786NS) (777NS,572NS,562NS) R303 R666 (986NS) (787NS,786NS,772NS) (572NS,562NS) R768 (986NS,787NS,786NS 772NS) (572NS,562NS) R761 (986NS) (787NS,772NS) R602 R608 R515,589 R614 R797A R914 R629 (986NS,787NS,786NS,772NS) (572NS,562NS) R307,732 R715 (772NS) (572NS) R2A7 R207,237,267, R534 R205,235.265,910,911 R741 R706,708 (986NS,787NS,786NS) (772NS) R535,654,728 R667 (986NS,787NS,786NS,772NS) (572NS,562NS) R723 ( 986NS,787NS,786NS,772NS 572NS 562NS.