Vb Board - Sony KV-25FS12 Manual De Servicio

VB BOARD SCHEMATIC DIAGRAM
1 |
CN901
5P
TO A BOARD
A
CN506
VM OUT 5
9V
4
E 3
—
NC 2
C912
+B 1
470
25V
B
L901
JW(5mm)
—
+B
C
C909
0.0047
500V
E
:FPRD
—
D
(VELOCITY MODULATION)
—
A
—
B
—
2 | 3
C914
R923 0.047
47 :PT
9V
R920
820
C913
0.001
R919
100
R918
R917
9V
100
1k
R916
1k
2.4V
Q903
2SC3311
D903
AMP
R915
1SS133
1.8V
1k
R913
TEMP-CORR
Q904 R911
68
68
2SC3311
R914
AMP
270
R912
220
C907
Q902
C908
33
470
2SA1837
160V
10V
VM.DRIVE.1
R909
47
1/2W
67.9V
R907
135.4V
D902
2.7
MTZJ-T-77-39
:FPRD
134.9V
R908 C905 R906
560 0.047 18k
:FPRD 200V
:PT
VB
[VELOCITY MODULATION]
1 | 2
| 4 |
Q906
6.1V
2SC3311
R922
VM OUT
R921 :FPRD
10k
5.7V
5.7V
5.4V
Q905
2SA1309A-QRSTA
5.4V VM OUT
2.4V
C911
100
1.8V
10V
R910
180
3W
:RS
C910
0.1
Q901
200V
:PT R902
2SC4793
R905
2.7
1k VM.DRIVE.2
:FPRD
:FPRD
67.9V
0.4V
D901
MTZJ-T-77-39
0.9V
C903
R903
R904 470
560
18k 10V
:FPRD
C906 C904
0.001 :PT 0.001 :PT
C902
C901 0.047
2.2 :PT
160V
| 3 |
— 35 —
5 | 6 |
22
CN902
8P
Q.P.-
8
7 Q.P.-
Q.P.+
6
Q.P.+
5
E
4
E
3
VM
2
1 VM
R901
47
:FPRD
BA5-902-VB
4 | 5
KV-25FS12 / 25FS12C