Stk403-070 (Fic01) : Power Amp.; Stk412-020 (Wic01) : Power Amp. - JVC MX-GA77 Service Manual

STK403-070 (FIC01) : Power amp.

1.Pin layout
+Vcc -Vcc
1 2
2.Block diagram
2
7
10
Pre Driver IC
CH1
11
1
SUB
8 9

STK412-020 (WIC01) : Power amp.

1.Block diagram
R3
D2
TR1
TR2
TR6
C2
R1
C1
14
R4
TR3 TR4
R5
15
16
R6
TR5
R7
D1
R2
Ch1 Ch1 Ch2 Ch2
+TRE SUB GND
out out out out
3 4 5 6 7 8
TR1
R5
R1
TR3
R2
R6
C1
TR2
4
13
TR19
TR9
TR18
TR8
TR10 TR20
TR7
12 9 8 11 10
Ch1 Ch1 Ch2 Ch2
ST-BY
IN NF NF IN
9 10 11 12 13 14
TR4
R7
TR6
R8
TR5
Bias Circuit
3 5 6
1817
R13
D12
TR11
TR12
TR16
R11 C11
C12
TR14 TR13
R14
R15
R16
TR15
TR17
R17
R12
R3
14
Pre Driver IC
CH2
R4
13
C2
12
TR41
R41
Comaprator
D42
D43
D41
D51
SUB
D53
D52
Comaprator
TR51
R51
MX-GA77
1
3
2
7
5
4
6
1-41