Pioneer A-307R Service Manual

28
A-307R, A-207R
+BL
SP-A SP-B
H.P
POWER AMP WRLC 39dB
FUNC MUTE
DIRECT ON/OFF
RIAA 37dB
TONE
AND
BALANCE
DIRECT ENERGY MOS
PHONO REC TUNER LINE CD TAPE1 /MD REC
TAPE2
MONITOR
PROTECTION RY
FUNCTION
2 8mV /50kΩ 200mV /50kΩ 200mV /1kΩ 200mV /50kΩ 200mV /1kΩ
CN101 CN102
UNUSUAL
OUTPUT
DETECTION
–BL
+BH
+19 –15
TO POWER STAGE
TO FUNCTION SW DIRECT, LOUDNESS ON/OFF VOLUME UP/DOWN FUNC MUTE ON/OFF TO PROTECTION RYSR INPUT
FROM FUNCTION SEL KEY INPUTS
µ-COM
FROM UNUSUAL OUTPUT DETECTION
TO VOLTAGE STAGE
TO µ-COM
TO OP AMP
RY
LED
+ 6
–BH
D
IC101
D
IC601
F
Q507
A
Q509
A
Q303
RY401 RY402 RY403
D
D451
D
401
D
JA501
B
S801
C
FU1T1
C
D454 D455
IC453
IC451 IC452
D
D
D
D
IC751 VR751 VR752
E
VR601
F
Q505
A
IC151
D
ON/OFF
LOUDNESS
VOLUME
UP/DOWN
M
Q501 Q503
A
Q337-Q340
D
VR501
A
REGULATOR
7.3 BLOCK DIAGRAM

Pioneer A-307R Specifications

General

Brand	Pioneer
Model	A-307R
Category	Amplifier
Language	English