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F. H/V F-V converter and associated circuit
Check H. SYNC
(Un'table pkMe
)
on the DEF PWB
PWE-173A
Lack of linearity improvement
Point S4
HV. protector
Check sync circuit
--
NG
on the INTERFACE PWB
PWE-176
OK
Check 2 pin of
IC505 voltage
Normally, the 2 pin
is approx. 24V
NG
R593 Failure
OK
..
Check the IC505
(Measure on the DEF PWB)
output
PWE-173A
--fH(
IC505
20K
27K
35K
42K
50K
I
I
I
I
I
I
--------~---------
10
I
I
----------_.
11
I
I
- - - - -
12
14
I
------
I
- - - - - - - - - - - - -
15
16
I
-----------_
..
NG
IC505 Failure
OK
Check 17, 18 pin of
(When 17 pin
=
7.7V at 27K)
IC505 voltage
18 pin
=
7.9V at 42K
NG
rC505 Failure
OK
H F/V is OK
-45-
Hz)
High
Low
High
Low
High
Low
High
Low
High
Low
High
Low
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- Pin Assignments and Signal Levels
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