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COLOR MONITOR
SyncMaster 320TFT/520TFT
SERVICE
COLOR MONITOR
Manual
CONTENTS
1. Precautions 2. Reference Information 3. Product Specifications 4. Operating Instructions 5. Disassembly & Reassembly 6. Troubleshooting 7. Exploded View & Parts List 8. Block Diagram
**
9. Electrical Parts List 10. PCB Diagrams 11. Wiring Diagram 12. Schematic Diagrams
12 Schematic Diagrams
12-1 DAC & IO Part Schematic Diagram
20
1
18
19
7
9
8
Power Line Signal Line
12-1
SyncMaster 320TFT/520TFT
12 Schematic Diagrams
Table 12-1. IC102
pin # MODES 1024 x 768 / 85 Hz 12 GND 5
Table 12-2. IC103
pin # MODES 1024 x 768 / 85 Hz 12 GND 5
Table 12-3. IC107
pin # MODES 1024 x 768 / 85 Hz 12 5 GND 5 GND
1 2 3
1 2 3
Unit: Vrms
Unit: Vrms
1 2 3 4 5
Unit: Vrms
Table 12-4. IC108
pin # MODES 1024 x 768 / 85 Hz 12 3.3 GND 3.3 GND
Table 12-5. IC109
pin # MODES 1024 x 768 / 85 Hz 12 GND 5
1 IC110 #3
1 2 3 4 5
1 2 3
CH1 RMS = 3.6 V
Unit: Vrms
Unit: Vrms
7 IC101 #94
8 IC105 #10
9 IC104, #1
CH1 RMS = 3.5 V
CH1 RMS = 3.1 V
CH1 RMS = 4.56 V
18 IC110 #13
19 IC110 #14
20 IC110 #2
CH1 RMS = 1.24 V
CH1 RMS = 400 mV
CH1 RMS = 4.4 V
SyncMaster 320TFT/520TFT
12-2
12 Schematic Diagrams
12-2 ZOOM & FRC Part Schematic Diagram
2 16
3
5 4
15
6 17
12 13 14 10 11
Power Line Signal Line
12-3
SyncMaster 320TFT/520TFT
12 Schematic Diagrams
Table 12-6. IC309
pin # MODES 1024 x 768 / 85 Hz 11.96 5.90 4.99 5.8 mV 4.99 4.99 11.95 11.95 2 IC310 #22 3 IC310 #23
1 2 3 4 5 6 7 8
CH1 RMS = 3.1 V
CH1 RMS = 2.3 V
Unit: Vrms
4 IC310 #25
5 IC310 #26
6 CN301 #5~20
CH1 RMS = 2.8 V
CH1 RMS = 2.12 V
CH1 RMS = 1.18 V
10 IC301 #2
11 IC301 #3
12 IC301 #54
CH1 RMS = 2.3 V
CH1 RMS = 3.25 V
CH1 RMS = 2.35 V
13 IC301, #55
14 IC301 #56
15 IC307 #12
CH1 RMS = 200 mV
CH1 RMS = 50 mV
CH1 RMS = 2.2 V
16 IC307 #5
17 IC307 #10
CH1 RMS = 1.7 V
CH1 RMS = 4.3 V
SyncMaster 320TFT/520TFT
12-4
12 Schematic Diagrams
12-3 Micom Part Schematic Diagram
Table 12-7. IC401
pin # pin # MODES 1024 x 768 / 85 Hz 59.8 mV 5 5 5 4.62 0.457 4.91 5 GND 5.03 5.02 5.02 NC NC 4.94 93.7 mV 3.217 4.97 5.01 63.0 mV 0.476 MODES 1024 x 768 / 85 Hz 3.44 GND 4.16 5.01 4.97 4.46 4.43 4.78 4.77 14.07 2.226 2.238 5.03 5.03 4.96 4.96 52.7 mV 4.96 4.87 GND 9.7 mV
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
Unit: Vrms Table 12-8. IC403
pin # MODES 1024 x 768 / 85 Hz NC NC NC GND 4.43 4.46 4.87 5.03
1 2 3 4 5 6 7 8
Unit: Vrms
Table 12-9. IC404
pin # MODES 1024 x 768 / 85 Hz GND GND GND GND 5.03 5.03 GND 5.03
1 2 3 4 5 6 7 8
Unit: Vrms
Power Line
12-5
SyncMaster 320TFT/520TFT
12 Schematic Diagrams
12-4 Sub Part Schematic Diagram
Table 12-10. IC803
pin # MODES 1024 x 768 / 85 Hz
1 GND 2 GND Signal (+2.5 V Bias) 3 4 5 5 Signal (+2.5 V Bias) 6 Input Signal (+2.5 V Bias) 7 GND 2.5 8 9 2.5 10 2.5 11 Input Signal (+2.5 V Bias) Signal (+2.5 V Bias) 12 13 5 14 Signal (+2.5 V Bias) 15 GND 16 2.5 V (Headphone : 5 V)
Unit: Vrms
SyncMaster 320TFT/520TFT
12-6
12 Schematic Diagrams
Memo
12-7
SyncMaster 320TFT/520TFT