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COLOR MONITOR
SyncMaster 320TFT/520TFT
SERVICE Manual
COLOR MONITOR 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
19
1 18
7
9
8
Power Line
Signal Line
12-1 SyncMaster 320TFT/520TFT
12 Schematic Diagrams
Table 12-1. IC102 Table 12-2. IC103 Table 12-3. IC107
pin # MODES MODES MODES
pin #
pin #
1024 x 768 / 85 Hz 1024 x 768 / 85 Hz 1024 x 768 / 85 Hz
1 12 1 12 1 12
2 GND 2 GND 2 5
3 5 3 5 3 GND
4 5
Unit: Vrms Unit: Vrms 5 GND
Unit: Vrms
Table 12-4. IC108 Table 12-5. IC109 1 IC110 #3
MODES MODES
pin #
pin #
1024 x 768 / 85 Hz 1024 x 768 / 85 Hz
1 12 1 12
2 3.3 2 GND
3 GND 3 5
CH1 RMS = 3.6 V
4 3.3
5 GND 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 5
3
4
16
6
15
17
12 13 14
10
Power Line
11
Signal Line
12-3 SyncMaster 320TFT/520TFT
12 Schematic Diagrams
Table 12-6. IC309 2 IC310 #22 3 IC310 #23
pin # MODES
1024 x 768 / 85 Hz
1 11.96
2 5.90
3 4.99
CH1 RMS = 3.1 V CH1 RMS = 2.3 V
4 5.8 mV
5 4.99
6 4.99
7 11.95
8 11.95
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
MODES MODES
pin #
pin #
1024 x 768 / 85 Hz 1024 x 768 / 85 Hz
1 59.8 mV 22 3.44
2 5 23 GND
3 5 24 4.16
4 5 25 5.01
5 4.62 26 4.97
6 0.457 27 4.46
7 4.91 28 4.43
8 5 29 4.78
9 GND 30 4.77
10 5.03 31 14.07
11 5.02 32 2.226
12 5.02 33 2.238
13 NC 34 5.03
14 NC 35 5.03
15 4.94 36 4.96
16 93.7 mV 37 4.96
17 3.217 38 52.7 mV
18 4.97 39 4.96
19 5.01 40 4.87
20 63.0 mV 41 GND
21 0.476 42 9.7 mV
Unit: Vrms
Table 12-8. IC403
MODES
pin #
1024 x 768 / 85 Hz
1 NC
2 NC
3 NC
4 GND
5 4.43
6 4.46
7 4.87
8 5.03
Unit: Vrms
Table 12-9. IC404
MODES
pin #
1024 x 768 / 85 Hz
1 GND
2 GND
3 GND
4 GND
5 5.03
6 5.03
7 GND
8 5.03
Unit: Vrms
Power Line
12-5 SyncMaster 320TFT/520TFT
12 Schematic Diagrams
12-4 Sub Part Schematic Diagram
Table 12-10. IC803
MODES
pin #
1024 x 768 / 85 Hz
1 GND
2 GND
3 Signal (+2.5 V Bias)
4 5
5 Signal (+2.5 V Bias)
6 Input Signal (+2.5 V Bias)
7 GND
8 2.5
9 2.5
10 2.5
11 Input Signal (+2.5 V Bias)
12 Signal (+2.5 V Bias)
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