Service manual

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POWER CHECK
Every kinds of Fuse check
C901(+), C902(-) DC power output check
C903(+) DC power output check
IC901, IC902 power output check
IC903 power output check (12V)
CN513 7PIN 5V check (at CD Function)
normal operation
Fuse replace
CN901 1, 5 AC voltage output check
D901 replacement
Power supply Ass’y check
and transformer replacent
IC301 5V Power output
PN302/CN302 13 PIN check
Check
IC5019BU2090 check & replace
IC501(BU2090) 14PIN HIGH check
Q905 Base HIGH(C103M)
Check and replace defective
Power supply Ass’y check
and transformer replacent
CN901, 9, 10 pin DC power output check
IC901, IC902 check and replacement
D902, D903, D904, D905 (1SR35)
check and replacement
IC301 77PIN 5V check
IC904 replacement
Q904(A1273) Base Low check
Q904, CD Ass’y check replacement
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES