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Defective display section
Is there any button or tact
switch jamming?
Has the flat cable been in-
serted
incorrectly,
and are
there any solder bridges?
Is the reset circuit normal?
YES
Defective reset circuit
Correct
solder bridges and
other
faulty
— soldering
around
iC12,
IC201,
FL,
and the LED terminals.
Does carriage continue after
reaching inside track?
Is pin 1 (INSD) of CN4 at [NO
L level?
YES
Defective
inside switch, or
defective
mechanism,
or
signal line solder bridge or
disconnection
PD-6010
Defective carriage
Does carriage move?
NO } Does carriage continue after
reaching outside track?
Is a positive voltage detec-
ted at pin 2 of IC3?
Are
all
Is the soldering around IC3,
|NO
(1/2), and IC6 OK?
YES
Defective reset circuit
Carriage
reversed
wired.
motor
or
polarity
incorrectly
anical
fault
slipping belt
IC3
and
voltage normal?
Disconnected
motor
lead,
defective
motor,
or mech-
IC6 pin{|
NO
such
as
a
IC6
23 Pin
Playback
Forward
(outer tracks)
+
—-9~—-11V
-08~
—1V
Reverse
(inner tracks)
+
+9~
+11V
+0.8 ~
1V
Stop
|.
OV
OV
45
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