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Panasonic RS-B25 Service Manual page 11

Dolby b c nr-equipped stereo cassette deck

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RS-B25
RS-B25
—-RS-B25
s7oi-1
4
Auto Rec Mute
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6 OUT
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$706
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|
|
Rec Inh
10901
|
MICRO-
5
4
COMPUTER
m BLOCK DIAGRAM
ee
var
{C401
overall
DOLBY
NR
gain
adj
(Dolby NR selector)
QIg
Line mute
$703
ION
$704
out
CB)
1
oot
5
2
CH
|
|
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|
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|
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VRI
|
Input control
|
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|
DA
"
VR3
Qlo
1
|
Balance
Z
Input mute/ON
a)
POWERSUPPLY|
|
|
control
Ic2
Q2i
P.B EQ AMP
CP
Line mute
|
|
Record/play back
C=
7-7
|
VR5
7ON
|
|
—s
34
P.B Gain adj
|
Head
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muting
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|
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control
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VR301
|
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Bias
4
|
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|
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Rec mute/o
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|
T301
301,302
|
Sis
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ates
1 |
|
Normal/ON
(C901
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|
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MECHANISM DRIVE
|
Erase
|
@;
ere
— 4
|
Head
22
1
|
QI7
Qis
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1C901
'ane
|
(Tape selector)
4
Metal/ON
=)
Metal/O
—)
|
1 |
SFot
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SS
SS
:
a
$702-2
(CrO,) OFF
|
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|
20h
bo
© (Metal) ON
|
pat
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S! TIMER
$904
| '
|
|
|
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D603 606
a3
EF
(Normal) ON
te
S60
POWER
ON/OFF
|
REC
|
| @905
Q90i
[Reset
}—*0
10
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5. tO.
MS/ON
Power/ON
x
| drive
1c201
I
|
MS AMP
1C201
pal
Play
Plunger
X
Hall IC
(Recind)
|
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