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VOLTAGE
DETECTOR
The voltage detection circuit is an OR circuit consisting of Q7OL, Q702. First. the Leh and Reh sigaals are mixed by R/Q1,
R702. When this voltage is minus. Q702 is turned ON and when this voltage
is plus,Q701
is turned ON and the relay is
turned OFF.
Since the center voltage is unrelated to ON-OFF of the load, when an abnormal voltage has been detected,
the relay remains
Off and the hold circuit is operated until the voltage returns to normal.
Once the hold circuit
has been actuated
it is not
reset until the power
has been turned back
on after the cause of the trouble
has been corrected.
EXPLODED VIEW
\
\
PARTS LIST
REE.
CIRCUIT
NO.
NO.
|
A351
?
3
A501
4
A502
5
A504
6
AS05
7
A506
8
A507
9
A601
10
A602
11
A603
12
A801
13
A802
14
A803
PARTS
NO.
28184032
12819121
27210083
27265009A
27267014
27267015
28198502
28198509
27170036
27175004
280379
28320155
28320157
28320158
DESCRIPTION
Amp. top cover
Iront panel ass'y
Front panel
Ring
Guide for push switch knob
Guide for power switch knob
Facet for power indicator
Facet for protection indicator
Bottom board
Leg
Leg
Volume control knob
Balance control knob
Selector, Tape monitor/
Dubbing knob
REF.
NO.
1S
16
17
18
19
20
21
22
23
24
25
26
CIRCUIT
NO.
A806
A807
A808
A805
A804
P801
A604
A352
A605
A600
A509
PARTS
NO.
28320161
28320163
28320162
28320160
28320159
250126
28140024
834140162
838440109
832140122
831130082
8 38130062
DESCRIPTION
Tone control knob
Tone shift knob
Speaker selector Knob
Push switch knob
Power switch knob
3P64M, stereo headphone jack
Cushion
4STS+16BQ
4TTB+10C BC, Screw
4STR+12BQ
3STWt+8BQ
3STBt6BQ
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