Schematic Prints

1
3
4
R5
SVR1: Input stage bais adjust. SVR.
SVR2: Output voltage ossfet adjust. SVR
SVR3: Power stage static bais adjust.
SVR
JP1
JP3
C6
10uF
TP3
C13
470uF
Vcc
R14
C15
0.1uF
1
0
1M
C4
0.1uF
1
0
A
2
0
JP1, JP2: Extenral drive stage regulator
jumper, Short for not using external
regulator.
TP1
R3
221R
R10
10R
JP3, JP4: Power stage static bias test
point, using 1R/1W current limit resistor
for adjust.
10R/1W
C10
10pF
Q9
MJE15030
Q1
2SK170
C1
Q3
2SK170
R8
221R
B
IN
SGND
0
1
6.8uF
R1
C8
C9
6.8uF 0.1uF
SVR1
100R
10K
SVR2
1K
C3
220pF
R9
221R
Q2
2SJ74
Q4
2SJ74
0R
R11
221R
R2
10R
C
Q11
2SC5200
Q13
2SC5200
R23
0.22R
R25
0.22R
R24
0.22R
R26
0.22R
Q12
2SA1943
Q14
2SA1943
CX1
0.1uF
B
Q7
MJE340
SVR3
5K
RX1
CN2
10R/1W
R17
22R
OUT
0
Q8
MJE350
R12
221R
R21
Vee
C11
10pF
R19
0R
R20
Vcc
0.1uF
C2
V+
R16
10R
Q6
MJE15031
TP1TP4: Input stage bias test point.
CN1
A
CN5
0R
R22
Q10
MJE15031
CN3
PGND
0
CN4
0
PGND
0R
Q5
MJE15030
C
TP2
R4
221R
R13
10R
R15
R18
10R
CN6
0
TP4
C14
C16
470uF 0.1uF
10R/1W
Vee
V-
1
0
C7
10uF
1
0
C5
0.1uF
R6
JP2
1M
JP4
R7
85K
C12
5pF
D
D
JC-3 CLASS A POWER AMPLIFIER
1
2
3
4