Harman Kardon CDR 25 (serv.man4) Service Manual ▷ View online
41
NO
•Check the connection of IC207 pin 21
and 30.
•Check and replace the IC207(CPLD).
NO
•Check the connection of IC207 pin 18
and 34.
•Check and replace the IC207(CPLD).
YES
YES
NO
•Check the connection of IC304 pin 19.
•Check and replace the IC304(DAC)
•Check and replace the IC304(DAC)
YES
YES
G
Execute ‘E.LD On’ of ‘How to use
Test Tool(Dragon) : ‘VWDC-2’
Test Tool(Dragon) : ‘VWDC-2’
PN301 Pin 30(ODON)=H?
PN301 Pin 31(W/XR)=H?
PN301
Pin26(VWDC2):
(1.0±0.2V)?
Check the P/U connector and
replace the P/U.
replace the P/U.
42
NO
Check disc Label.
In case of writing fail.
Check the Media CD-R
or CD-RW?
YES
YES
Remove the Dust, Fingerprint
and if the disc has long width
Scratch, change it.
and if the disc has long width
Scratch, change it.
Does the disc have
any Dust, Scratch,
Fingerprint...?
NO
NO
Eject Disc.
Go to “Writing Part Check”
Finalized Disc?
YES
If CD-R disc, use new CD-R disc.
If CD-RW disc, erase the disc.
If CD-RW disc, erase the disc.
Nomal Case
43
NO
• Check the communication Iines
between IC203 and IC201.
• Check and replace that.
Writing Part Check.
Does the unit
becomes stand-by mode to
record/dubbing?
YES
NO
Eject Tray.
Go to “ALPC Logic Circuit Check”.
Dose Writing finish
without any error?
YES
NO
NO
Go to “BETA Measurement
Circuit Check”.
Circuit Check”.
Check the connection of IC201
pin 187 and replace IC201.
pin 187 and replace IC201.
Is the written file
read nomally?
Is the re-written file
readed nomally?
Is
ROPCSH input signal
Pulse when CD-R writing
(IC301 pin 38)
YES
YES
Refer “Laser is abnormal”.
Load tray with CD-R/RW Disc.
Start Recording or dubbing.
OK
YES
44
•Check the connection of IC201 pin 13.
•Check and replace the IC201.
•Check and replace the IC201.
•Check the connection lines of IC201.
•Check and replace the IC201.
•Check and replace the IC201.
•Check the connection lines of IC207.
•Check and replace the IC207.
•Check and replace the IC207.
•Check the connection lines of
IC207 pin 21,18.
•Check and replace the IC207.
YES
Are
IC207 pin 29(EFM1),
30(EFM2),42(RESAMP1),
2(RESAMP2), 41(ROPC1)
pulse signals?
Are IC301 pin
31(WFPDSH),32,
33(WBLSH), 34(SPDSH), 35(MPDSH)
pulse signals?
Are PN301
pin30(ODON) 31(W/XR)
pulse signals?
IC207 Pin 27(WGATE)=“H”?
YES
IC301 Pin 50(WLDON)=“H”?
YES
ALPC Logic circuit check
IC207 Pin 33(CDR/RW)=“H”?
IC207 Pin 34(WR/RE)=“H”?
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
Execute ‘E. LD On’ of ‘How to
use Test Tool(Dragon)’:
‘CD-R Recording Mode’
K
Dragon : Execute LD ‘off’
Dragon : Execute LD ‘off’
•Check the connection of IC207 pin 20.
•Check and replace the IC207.
•Check and replace the IC207.
•Check the connection of IC207 pin 7.
•Check and replace the IC207.
•Check and replace the IC207.
•Check the connection of IC207 pin 166.
•Check and replace the IC207.
•Check and replace the IC207.
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