FLOW CHART NO.8 CASSETTE CONTROL TROUBLESHOOTING (1)
I
A cassette tape is not taken in.
I
,
FLOW CHART NO.9
CASSETTE
CONTROL
TROUBLESHOOTlNG
(2)
A cassette tape is taken in, but ejected at once.
Fix or replace the cassette housing.
Does the start sensor pulse at pin
(87) of
IC701
change from a “L’ to No
Check start sensor and all the way
“H” level when the cassette tape is
up thru to
IC701.
loaded?
NO
Are the start sensor cover go to
open when the cassette tape is
inserted?
YE5
NO
Check start sensor cover.
YES
I
I
Does pin (87) of It701 change
from
“H”
to “L’ level when the
cassette tape is inserted?
NO
Check start sensor and all the way
up thru to pin (87) of
IC701.
L
6
1
YE5
Does pin
(5)
of
IC704
go to a “H”
(about 1.7V) level when the
cassette tape is inserted?
YES
NO
-
+
Check line between pin (96) of
IC701
and all the way up thru to
pin (5) of
IC704.
Does pin (2) of
lC704
change to
NO
Check
IC704.
about
1OV
when the cassette tape
is inserted?
7
Is the specified voltage applied at
NO
Check between
IC704
and loading
the loading motor terminal when
the cassette tape is inserted?
YES
Replace loading motor.
Does the end sensor pulse at pin
NO
(88) of
IC701
change from a
“L”
to
Check end sensor and all the way
a
“H”
level when the cassette tape
is loaded?
YES
Does the master cam mode shifter NO
operate normally when the
Check cam switch and all the way
cassette tape is loaded?
up thru to
1~701.
YES
Replace
IC701.
To Next Page
Loading...
