Philips MX3900D Service Manual page 22

POWER SWITCH PART - CIRCUIT DIAGRAM
1 2 3
+C
3505
A
470R
+C
B
3503
100R
1500
1
2
Stdby_LED
3 RC6
C
4 LPS_LED
5 Stdby_key
Standby
6
GND_B
7
+C
FE-ST-VK-N
D
GND_B GND_B
1 2 3
POWER SWITCH PART - COMPONENT & CHIP LAYOUTS
6-6
4 5 1500 B1
1501 D2
2501 B3
2502 D3
3501 C4
3502 A3
3503 B3
3504 B3
3505 A3
3506 D4
7504
A
6500 D4
BC847B 6501
6501 A4
7500 D4
LTL-816GE
7501 B5
7504 A3
T500 B1
T501 C1
7501 TSOP4836ZC1
T502 C1
B
T503 C1
3
VS
T504 C1
T505 D1
1
OUT
GND
2
GND
C
7500
3506
BC847B
470R
D
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4 5
DTC KEY PART - CIRCUIT DIAGRAM
1400 A1 1402 A2 1404 A3 2400 A3
1401 A1 1403 A2 1405 A3 3400 A2
1 2
1400
1
DISC1
DISC2
GND_B
3400 3401
2
150R 220R
EH-S
A
GND_B
GND_B
1 2
DTC KEY PART - COMPONENT & CHIP LAYOUTS
6-6
3401 A2 3403 A3
3402 A2
3
DISC4
DISC3
DISC5
3402 3403
270R 390R
A
GND_B GND_B GND_B GND_B
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3