Aiwa xc-rw700 Service Manual page 87

TROUBLESHOOTING - 24/26
QQ
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ALPC Logic circuit check
Execute E. LD On of How to
use Test Tool(Dragon) :
CD-R Recording Mode
IC601 Pin 33(CDR/RW)= H ?
IC601 Pin 34(WR/RE)= H ?
IC401 Pin 27(WGATE)= H ?
IC601 Pin 50(WLDON)= H ?
IC601 pin 29(EFM1),
30(EFM2),42(RESAMP1),
2(RESAMP2), 41(ROPC1)
TE
L 13942296513
38(WFPDSH),39(RFPDSH),
40(WBLSH), 41(SPDSH), 42(MPDSH)
pin30(ODON) 31(W/XR)
Dragon : Execute LD off
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YES
YES
YES
YES
Are
pulse signals?
YES
Are IC401 pin
pulse signals?
YES
Are CN401
pulse signals?
YES
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8
Check the connection of IC701 pin 20.
NO
Check and replace the IC701.
Check the connection of IC701 pin 7.
NO
Check and replace the IC701.
Check the connection of IC201 pin 166.
NO
Check and replace the IC201.
Check the connection of IC601 pin 13.
NO
Check and replace the IC601.
NO Check the connection lines of IC201.
Check and replace the IC201.
Q Q
3 6 7 1 3
Check the connection lines of IC601.
NO
Check and replace the IC601.
Check the connection lines of
NO
IC601 pin 21,18.
Check and replace the IC601.
Dragon : Execute LD off
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