Philips MX3900D Service Manual page 23

HDPH & MIC PART - CIRCUIT DIAGRAM
1600 A3 1602 A6 1604 B5 2601 A5 2603 B4 2605 C5 2607 C3
1601 A6 1603 C1 2600 A4 2602 A5 2604 B4 2606 C3 2608 C4
1 2
A
B
YKB21-5075G
1 2606
2
47n
4
5
C
6
1603
mic_gnd
mic_gnd
mic_gnd
1 2
6-7
2609 C2 3605 C4 3607 B5 3609 C5 3611 C5 3613 C2 3615 C5
2610 C4 3606 B3 3608 C3 3610 C3 3612 C4 3614 C3 5600 A5
3 4 5
5
1600
4
YKB21-5005G
2
3 5600 2u2
7
8
HP_DET
1
47n 4822 121 43526
(rework at PS)
1604
To bottom
RT-01T
plate ground
5603
2u2
mic_gnd
2604
3609
3608
2605
1M0
470n
1M0
agnd 1u0
3610
7600
BC847B
BC847B 7601
10K
3605
2607
2608 470R
1n0
470n
agnd
20K
3612
agnd
mic_gnd
agnd
agnd
3 4 5
HDPH & MIC PART - COMPONENT & CHIP LAYOUTS
5603 B5 7601 C5
7600 C3
6
1601
1602
FE-ST-VK-N FE-ST-VK-N
1
1
2
2
3
3
A
4 4
5
MIC_DET
agnd
6
7
8
B
+12A
MIC
MIC_DET
C
8239 210 94152 dd wk0250
6
6-7
47n
(rework at PS)
To bottom
plate ground