Panasonic RS-B25 - Schematic Diagram

1 2
m@ SCHEMATIC DIAGRAM
LINE IN
MIC
(Len)
VOLUME
CIRCUIT SECTION
22K
(ich) (O C1)
Rit ic
C3 RO
25V4.7 1K
nop
a
RS 47K
BB Main ciRCUIT SECTION
Overall Gain Adj.
10
QI~3
2SDIO1IT
© SWITCHING
Ich
MS218L
MIC AMP
09,10
2SD1450R
iNPUT MUTE‘ON
O
it
RECORD / PLAYBACK
HEAD
Balance Control
(Loch)
LINE IN
(R ch)
MIC
(Roch)
Bias Current Adj.
Erase Current Adj.
@)
SWITCHING
M5219L
PB. EQ AMP
Q21,22
2SD1450R
REC/ON
:
cit 6vI00
a
an
[>
VRE 50K
REO C32
C35 9 q
€33 0.0082 0.9033 7 pecan pigui
2SDI450R
LINE MUTE /ON
2SC3311Q
METAL /ON
Q17,18
| 25BI036R 2833110
RIO4
+——+?
R98 100K
¥
cS! SovI
0209,210
ISS254
cig = =6c20
C56 0022
0210
C8 0.022
R49 10K
2SCI846R
REGULATOR
060!
MA4I80M
Q602
2SA885Q
REGULATOR
< nN
2SC3311Q
METAL /ON
HHHFLEO METER CIRCUIT SECTION
R100 4.7K
c305
C303
OOAOMOOOOOD
TT ETT Io CI
© ODOOOLOD
C302 0.0033
0.0022 0.0068 0.0022
C304
5 gl Arco CE) (EH)
Vey
10
(172)
'CXA}
(EGA)
2
_AC POWER TRANSFORMER
Mcigcuit SECTION
C201 16V1000
b201
R217 10K
C205 I6VIO0
R203
1K
|SR35200TB
Erase Current Adj.
CEKICXLI ~ a
Qk)
IC701, 702
AN6882
METER DRIVE LED BLOCK
Q701,702 0703 ~710
2SC3311Q 1SS254
METER MUTING
Q207
2SC3311Q
TAPE SELECTOR