ViewSonic Va703b3 Service Manual
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Page 61
Model
Title
DateRev:
ViewSonic Corporation
TDA7496L
Layout guide :
1. Tie the I.C. pin 1,2,3,18,19,20 to ground with a
large copper pour (open mask layer)
Line_R Line_LR
L
+14V 6,7
VOL
2,4,6
MUTE
2,4,6
+14V
+14V
+14V
C704
0.47/16V
R703 10K
R715 27K
R712 2K
+
C702
470u/25V
R706
47K
C711 4700p/50V
R710 1K
R702 10K
R707 5K6
U701
TDA7496L
12313181920
4
5
6
7
8
9
10
11
12
14
1516
17
GND
GND
GND
GND
GND
GND
GND
INL
VAROUT_L
VOLUME VAROUT_RNC
INR
SVR
STBY
MUTE OUTR
VS VSOUTL
R701 5K1
Q702
PMBT39041
3
2...
Page 62
Model Title DateRev: ViewSonic Corporation Power Supply NL TO SCALER BD CN101 1000u/25V TOP245Y C808 1000u/25VTOP246Y Q7b VA703 IC802 ItemVA703m 680u/25V TOP246Y 100u/450V C805 100u/450V 82u/450V 90mm 8P 80mm 9P CN801 80mm 9P 12K R817 12K 8K2 R801 3M3 2M4 3M3 2M4 3M3 R822 3M3 2M4 3M3 R823 3M3 2M4 3M3 R805 3M3 PGND VCC5V +14V ON/OFF 2,7BRIGHTNESS 2,4,7 VOL 2,4,5MUTE 2,4,5 R821 1M L802 5uH R807 510K R818 3K3 1% C819 47u/25V R809 100 1% D819 1N4148 ZD803 NC/5V6ZD804 NC/16V R808 10K C812 1000u/10V R812...
Page 63
Model Title DateRev: ViewSonic Corporation Inverter +5V +5V ISEN2 ISEN1 +5V ISEN1 ISEN3 +5V ISEN3 OVP2 OVP1ISEN2 OVP2 OVP1 ON/OFF 2,6 +14V BRIGHTNESS 2,4,6 VCC5V 6 CN501 4100-D021 2 H L C513 1000p/50V C502 1000p/50V R509 470 1% C507 2.2u/25V R523 33K 1% C511 2.2u/25V R511 0 R521 33 D507 BAV99 1 3 2 R514 100K R526 10K C510 0.068/50V R529 1M IC501 OZ9938GN 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 DRV1 VDDA TIMER DIM ISSEN VSEN OVPT NC NC ENALCT SSTCMP CT GNDA DRV2 PGND D505 BAW56 32 1 D506 BAW56 32 1 D503...
Page 64
Model Title DateRev: ViewSonic Corporation Keypad AUTOUP MENU DOWN POWER DOWN GND POWER LED_G UP AUTO MENU LED_O SW905 SW_TACT 1 32 4 CN901 8P R/A 2.0mm 1 2 3 4 5 6 7 8 SW904 SW_TACT 132 4 SW903 SW_TACT 132 4 LED901 LED G/Y 3 2 1 SW902 SW_TACT 132 4 SW901 SW_TACT 1 32 4 61 ViewSonic Corporation Confidential - Do Not Copy VA703b-3_VA703m-3
Page 65
62 ViewSonic Corporation Confidential - Do Not Copy VA703b-3_VA703m-3 11. PCB Layout Diagrams
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63 ViewSonic Corporation Confidential - Do Not Copy VA703b-3_VA703m-3
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64 ViewSonic Corporation Confidential - Do Not Copy VA703b-3_VA703m-3
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65 ViewSonic Corporation Confidential - Do Not Copy VA703b-3_VA703m-3 * Reader’s Response* Dear Readers: Thank you in advance for your feedback on our Servic e Manual, which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A. What do you think about the cont ent of this Service Manual? Unit ExcellentGood Fair Bad 1. Precautions and Safety Notices 2. Specification...