Harman Kardon CDR 26, Preliminary Service Manual

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•Check the connection of IC310 pin 13.
•Check and replace the IC207.
•Check the connection lines of IC201.
•Check and replace the IC201.
•Check the connection lines of IC207.
•Check and replace the IC207.
•Check the connection lines of
IC207 pin 21,18.
•Check and replace the IC207.
YES
Are
IC207 pin29(EFM1),
30(EFM2), 42(RESAMP1), 2(RESAMP2),
41(ROPC1) pulse signals?
Are
IC301 pin 31(WFPDSH),
32(RFPDSH),33(WBLSH),
34(SPDSH), 35(MPDSH)
pulse signals?
Are
PN301 pin30(ODON)
31(W/XR) pulse signals?
IC207 Pin 27(WGATE)=“H”?
YES
IC207 Pin 46(WLDON)=“H”?
YES
IC207 Pin 33(CDR/RW)=“L”?
IC207 Pin 34(CDR/R/W)=“H”?
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
Execute ‘E. LD On’ of ‘How to
use Test Tool(Dragon)’: ‘CD-RW
Recording Mode’
K
Dragon : Execute LD ‘off’ Dragon : Execute LD ‘Off’
•Check the connection of IC320 pin 20.
•Check and replace the IC203.
•Check the connection of IC320 pin 7.
•Check and replace the IC203.
•Check the connection of IC301 pin 166.
•Check and replace the IC301.
Normal