A Board - Sony FDL-PT22/JE Service Manual

A BOARD : IC501 NJM2070M
NC 1 8 NC
+INPUT 2 BIAS 7 V+
+
-INPUT 3
6 OUTPUT
-
300 50k
GND 4 5 POWER
100k
GND
A BOARD IC
VOLTAGE LIST
Pin Volt
IC501 1 -
2 0
3 0.6
4 GND
5 GND
6 1.3
7 3.4
8 -
All voltage are in V.
- : Not used
A BOARD TRANSISTOR
VOLTAGE LIST
B C E
Q401 13.9 30.5 13.4
Q601 0.5 1.2 GND
Q602 0.7 3.1 0.2
Q603 0.2 3.0 GND
Q610 30.7 0.5 30.7
Q701 0 3.0 GND
Q702 0 3.0 GND
All voltage are in V.
– 23 –

A BOARD

DIODE
*
6
D406 G-5
3
D601 G-4
5
D602 D-4
4
D603 G-4
3
D604 C-5
3
D605 C-4
D701 D-3 –
IC
IC501 G-5
TRANSISTOR
*
1
Q401 G-5
Q601 C-4 2
2
Q602 D-4
2
Q603 F-4
Q610 C-5 2
2
Q701 G-3
2
Q702 G-3
VARIABLE
RESISTOR
RV450 C-6
RV501 D-5
RV601 C-5
A
AUDIO AMP, PC IN,
BACK LIGHT
– A BOARD –
1 2 3
< Component Side >
A
B
C
D
E
< Conductor Side >
F
G
H
I
NOTE:
: Pattern from the side which enables seeing.
: Pattern of the rear side.
4 5 6 7
– 24 –