Schematic Diagram - Main Board (4/4) - Sony MZ-N420D Service Manual

MZ-N420D
6-7. SCHEMATIC DIAGRAM – MAIN BOARD (4/4) –
• See page 45 for IC Block Diagrams.
CN872
14P
TP1882
TP1883
TP1884
TP1885
TP1886
TP1887
TP1888
FB803 0
TP1889
TP1890
TP1892
R847
TP1893 220k
TP1894
R874
C853 470k
0.01
B
D851
C880
MA728-TX
0.01
B
Q871
XP1501-TXE
R846
R845 100k
100k
R860
0
R873
470k
C871
0.1
B
C851
0.1
F
C374
47
C375
4V
0.1
C371
R361
0.47
100
R273
*2
R857
1M
R274
*3
TP1875
R271 R272
10k 47k
C271
*1
C272 C273
0.0047 0.0022
44 44
When IC852 is damaged, replace the MAIN board.
not used
J304
W901
4P
R312
1M
C399
0.1
D271
02DZ2.4-Z(TPH3)
D371
02DZ2.4-Z(TPH3)
C175
220
4V
C274 C275
C174
0.22 220
0.22
4V
IC371
NJM2776RB2A(TE2)
R275
R175
10
10
C368
C372 C373 C377
22
0.1 22 0.1
4V
6.3V
R173
*2
R174
*1 C171, C271 *3
2.2 : US
4.7 : EXCEPT US
R171 R172
*2 R173, R273
10k 47k
10 K : US
4.7K : EXCEPT US
C171
*3 R174, R274
*1
1 0 K : US
100K : EXCEPT US
C172 C173
0.0047 0.0022
D171
02DZ2.4-Z(TPH3)