COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-134 FACTORY MODEL: AS120J MODEL: AS120-1, AS120-BK-1 CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS SPECIFICATIONS ................................................... 2 SAFETY PRECAUTIONS ........................................ 3 TIMING CHART ....................................................... 4 OPERATING INSTRUCTIONS ................................ 5 WIRING DIAGRAM ................................................. 6 BLOCK DIAGRAM ................................................... 7 DESCRIPTION OF BLOCK DIAGRAM................... ..8 ADJUSTMENT ............................................
SAFETY PRECAUTIONS SAFETY-RELATED COMPONENT WARNING! There are special components used in this color monitor which are important for safety. These parts are marked on the schematic diagram and the replacement parts list. It is essential that these critical parts should be replaced with the manufacturer's specified parts to prevent X-radiation, shock, fire, or other hazards.
TIMING CHART VIDEO C D E SYNC B F A MODE H O MARK Sync Polarity Z O A L T A L MODE 6 MODE 7 MODE 8 — — — + + + + + 31.469 31.469 43.269 60.023 68.677 79.976 91.146 93.750 E 31.778 31.778 23.111 16.660 14.561 12.504 10.971 10.667 Video Active Time µs A 25.422 25.422 17.778 13.003 10.836 9.481 8.127 7.901 Blanking Time µs B 6.356 6.356 5.334 3.657 3.725 3.022 2.844 2.765 Front Porch µs C 0.640 0.640 1.556 0.203 0.508 0.119 0.406 0.
WIRING DIAGRAM P503 P401 P451 P402 P452 P453 FBT P801 S+ SP901 P701 AC Socket Signal Cable P302 P301 P303 -6-
SIGNAL INPUT BLOCK DIAGRAM -7-
DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 5. X-ray Protection. This is used for suppressing noise of power input line flowing into the monitor and/or some noise generated in this monitor flowing out through the power input line. That is to say, this circuit prevents interference between the monitor and other electric appliances. 2. Degauss Circuit & Coil. This circuit detects the rectified DC voltage comes from the FBT pin 4.
12. High Voltage Output & FBT (Flyback Transformer). 18. Static Convergence Control Circuit. The high voltage output circuit is used for generating pulse wave to the primary coil of the FBT (Flyback Transformer (T701)). A boosted voltage (about 27.5kV) appears at the secondary of the FBT and it is supplied to the anode of the CDT. And there are another output voltages such as the dynamic focus voltage.
ADJUSTMENT GENERAL INFORMATION 3) EEPROM → ALL CLEAR → Y(Yes) command. Do not run this procedure unless the EEPROM is changed. All data in EEPROM (mode data and color data) will be erased. 4) COMMAND → PRESET START → Y(Yes) command. 5) DIST. ADJ. → FOS. ADJ command. 6) Adjust H-POSITION as arrow keys to center of the screen. 7) Adjust H-SIZE as arrow keys to 390 ± 2mm. 8) Adjust V-POSITION as arrow keys to center of the screen. 9) Adjust V-SIZE as arrow keys to 293 ± 1mm.
11) Display color 15,0 Full White(70x70mm) at mode 7. 12) DRIVE ADJ command. 13) Set B-DRIVE to 90(5A(h)) at DRIVE of the alignment program. 14) Adjust R-DRIVE and G-DRIVE command to white balance x=0.283 ± 0.003 and y=0.298 ± 0.003 on the White Balance Meter with PC arrow keys. 15) Adjust SUB-CONTRAST command to 36±1FL of the raster luminance. 15) Display color 15,0 full white patten at Mode 7. 16) COLOR ADJ. → LUMINANCE → ABL command. 17) Adjust ABL to 26 ± 1FL of the luminance. 18) Exit from the program.
TROUBLESHOOTING GUIDE 1.
2.
3. NO RASTER NO VIDEO (POWER INDICATOR GREEN or AMBER) CHECK POWER INDICATOR GREEN or AMBER ? AMBER TROUBLE IN P302 SIGNAL CABLE GREEN CHECK SCREEN CONTROL KNOB OF FBT ROTATE SCREEN CONTROL KNOB TO CLOCKWISE or COUNTER CLOCKWIES OK CHECK VOLTAGE AT D924/D926 CATHODE (190V) D923/D929 CATHODE (80V) IC904 OUT (12V) D921 CATHODE (6.
4.
5.
6. NO DEGAUSSING NO DEGAUSSING CHECK IC401 PIN 6 (5V)? NO TROUBLE IN IC401 (MICOM) NO TROUBLE IN D925 NO TROUBLE IN P901 NO TROUBLE IN RL901 YES CHECK Q920 COLLECTOR VOLTAGE (0.
OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW D-Sub Signal Connector Front Control Panel Power ON/OFF Button AC Power Socket Power Indicator Front Control Panel 5 4 1. Power ON/OFF Button This button is used to turn the monitor ON and OFF. 3 2 1 3. + / – Adjust Buttons Use these buttons for adjusting the level of the selected item. 2. Power Indicator This indicator lights up green when the monitor operates normally; in DPMS (Energy Saving) mode, DPM off mode - it color changes to orange. 4.
- 18 - 2 1 5 A 5 6 5 15 B 5 7 8 9 14 14 10 14 16 EXPLODED VIEW 14 14 13 14 11 12 3 4 17
EXPLODED VIEW PARTS LIST Ref. No. Part No. Description 3091TKD003G CABINET ASSEMBLY, CN291E NEC D003 AF345 - White 3091TKD003H CABINET ASSEMBLY, CN291E NEC D003 AS120 - Black 6318G21001A CDT(CIRC), M51QBN291X115(E-TCO) SAMSUNG 107KHZ 29.
REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE : S SAFETY Mark AL ALTERNATIVE PARTS *S *AL LOC. NO. PART NO. DATE: 2003. 8. 25. DESCRIPTION / SPECIFICATION *S *AL LOC. NO.
*S *AL LOC. NO. C820 C821 C823 C832 C833 C834 C835 C841 C842 C843 C844 C845 C846 C847 C848 C849 C850 C851 C852 C854 C855 C856 C857 C858 C859 C860 C861 C863 C864 C865 C891 C892 C893 C894 C895 C896 C902 C903 C904 C905 C906 C907 C908 C909 C910 C911 C912 C915 C916 C917 C918 C920 C921 C922 C923 C925 C926 C927 C928 C929 C930 C931 PART NO.
*S *AL LOC. NO. PART NO. DATE: 2003. 8. 25.
*S *AL LOC. NO. Q701 Q704 Q705 Q706 Q707 Q708 Q721 Q723 Q724 Q725 Q726 Q771 Q801 Q802 Q803 Q804 Q806 Q807 Q808 Q810 Q811 Q812 Q832 Q833 Q834 Q836 Q837 Q838 Q839 Q841 Q842 Q843 Q844 Q901 Q902 Q903 Q912 Q913 Q914 Q915 Q920 PART NO.
*S *AL LOC. NO. R462 R463 R464 R465 R466 R467 R473 R493 R494 R601 R602 R603 R604 R605 R606 R607 R608 R609 R610 R701 R702 R703 R704 R705 R706 R707 R710 R711 R712 R714 R715 R716 R717 R718 R718-1 R719 R720 R721 R722 R723 R729 R730 R731 R732 R733 R734 R735 R736 R737 R738 R739 R740 R741 R742 R743 R744 R745 R746 R747 R748 R749 R750 PART NO.
*S *AL LOC. NO. R891 R892 R893 R894 R895 R896 R901 R902 R903 R904 R905 R906 R907 R908 R909 R910 R911 R912 R913 R914 R915 R916 R917 R918 R919 R920 R921 R922 R923 R924 R925 R926 R929 R930 R931 R932 R933 R934 R935 R941 R949 R950 R951 R952 R953 R954 R955 R984 R990 R991 R992 PART NO. DATE: 2003. 8. 25.
PIN CONFIGURATION M24C08 Serial I2C BUS EEPROM SYMBOL PSDIP8 (BN) 0.
TDA4867J PHILIPS 32P, SDIP SYMBOL PIN DESCRIPTION INP 1 INP 1 non-inverted input INN 2 INN 2 inverted input VP 3 VP 3 supply voltage OUTB 4 output B GND 5 ground OUTA 6 output A VFB 7 flyback supply voltage GUARD 8 guard output FEEDB 9 feedback inprt OUTB 4 GND 5 TDA4867J OUTA 6 VFB 7 GUARD 8 FEEDB 9 Pin Configuration GUARO output/ power save mode 8 GUARD CIRCUIT INP 1 Vp 3 GND VFB 5 7 FLYBACK GENERATOR AMPLIFIER A Idefl 6 OUTA vertical deflection coil Rp
TDA4841PS PHLIPS 32P HFLB 1 32 FOCUS XRAY 2 31 HSMOD BOP 3 30 HPLL2 BSENS 4 29 HCAP BIN 5 28 HREF BDRV 6 27 HBUF PGND 7 26 HPLL1 HDRV 8 25 SGND TDA4841PS XSEL 9 24 VCAP Vcc 10 23 VREF EWDRV 11 22 VAGC VOUT2 12 21 VSMOD VOUT1 13 20 ASCOR VSYNC 14 19 SDA HSYBC 15 18 SCL CLBL 17 HUNLOCK 16 Pin Configuration EHT compensaton via vertical size EHT compensation Block Diagram via horizontal size 22 1% 23 V-sync 14 (TTL level) clamping blanking V-S
SCHEMATIC DIAGRAM NOTICE Since this is a basic schematic diagram. The value of components and some partial connection are sucject to be changed for improvement without notice.
PRINTED CIRCUIT BOARD 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4.
P/NO : 3828TSO036C Aug.
