Trouble-Shooting Diagram; How To Trouble-Shoot - Yamaha 20C Service Manual

TRBL
SHTG
O20000-0
Trouble?
Basic checking
Check the equipment visually or
by operating according to pre-
delivery check or periodic check
procedures.
Simulation test
Discover the conditions under
the equipment went out of
order, and reproduce the same
conditions.

HOW TO TROUBLE-SHOOT

1) In case of trouble, first check the equipment according to the pre-delivery check and periodic check pro-
cedures.
2) Conduct a test under simulated conditions, and investigate the symptom of trouble.
3) Repair the defect, and conduct a confirmatory test to make sure that the cause of the trouble has been
removed.
4) When the symptom of trouble cannot be reproduced, set up conditions similar to those in which the trou-
ble occurred, and conduct a test again.

TROUBLE-SHOOTING DIAGRAM

TROUBLE-SHOOTING DIAGRAM
Symptom of trouble is
evident
Symptoms of
trouble
9-1
Repair of adjust
Locating the possible
cause of trouble
Repair of adjust
Confirmatory test
End
E