SERVICE MANUAL
Table 1
Functi
erenc
ve Resi
0K
Ω
1
Volume control input
35
0.
7.05
7.05
2
Not connected
0
∞
∞
3
Audio R signal input
6
2.3
23.54
54.61
4
S
e
23
upply voltag
15.
0.41
0.41
4 Functions and Service Data of TDA7057AQ (N600)’s Pins
Digital Multimeter
Pin No.
on Description
Ref
e Voltage
(V)
Positive Resistance
(20K
Ω
)
Negati
stance
(2
)
5
Audio L signal input
2.36
23.54
54.61
6
Ground 0
0
0
7
Volume control input
0.35
7.05
7.05
8
Left ch
outpu
annel in-phase signal
t
7.35
18.74
21.49
0
0
0
7.
18.4
21.47
ght channe
tput
2
0
0
ight channe
tput
Voltag
(K
Ω
(K
Ω
)
1 I
dr
4
ive(pos)
2.
27.7
20.3
2 I
dr
.4
ive(neg)
2
27.7
20.4.
P
5 GND
0
0
0
6 V
.0
.3
FB
45
113
13.7
7 V
.5
.1
O(A)
7
6
6.1
9
Ground 0
1
Left channel inverting signal output
39
7
11
Ri
l inverting signal
ou
7.39 18.47 21.47
1
Ground 0
13
R
l in-phase signal
ou
7.4 16.47 21.46
Table 15 Functions and Service Data of TDA8356 (N400)’s Pins
Digital Multimeter
：
Victor DT890D
Pin
No.
Symbol
Reference
e (V)
Positive Resistance
)
Negative Resistance
3 V 15.4
26.3
13.5
4 V
O(B)
7.7
6.1
6.1
8 V
O(guard)
0.2
10.0
9.7.
9 V
I(fb)
7.7
6.1
6.1
44
Summary of Contents for 25F83
Page 18: ...SERVICE MANUAL 3 Black Diagram 7 21 ...
Page 19: ...SERVICE MANUAL 8 22 ...
Page 20: ...SERVICE MANUAL 4 Pining 5 Refer to Table 12 about Functions and Data of the IC s Pins 9 23 ...
Page 46: ...CIRCUIT DIAGRAM JUC 820 975 JUC 820 591 JUC 820 725 JUC 820 644 APPENDIX ...
Page 47: ...Circuit Diagram for CRT RGB PCB of 25F83 PF25F83 ...
