Service manual

19SV111
TROUBLE SHOOTING TABLE ccontinued)
Symptom
Repair Procedure
Location of Fault
(in order of probability)
Display Normal, But Sound Abnormal
1. Is there faulty soldering cr a break in the
(1)
IC6 CPU
conductor pattern in R3, R4, R6, R7 or RS; (2)
Faulty soldering or a
Abnormal melody. Faulty IC6 CPU.
break in the
conductor pattern.
1. Is there faulty soldering or a break in the
(1)
IC9 HCU04
conductor pattern near IC9, C23, QS, R21, (48 or
(2)
1(6 CPU
FC1?
(3)
C23, FC1, QS, R21,
No sound. 2. Is IC9 faulty ?
C48
3. Are there breaks in the conductor pattern
near
(4)
Faulty soldering or a
the audio signal circuit?
break in the
4. Faulty I C6 CPU.
conductor pattern.
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