Philips CDR779 Service Manual page 46

GB 46 6.
6.3 Electrical service diagnostics
ELECTRICAL SERVICE DIAGNOSTICS
(software versions, test for defective components)
If power ON,
switch power OFF
Load CD-DA disc (SBC444A)
Press <PLAY> + <F FWD>
simultaneously and switch ON unit
PLAYER
INFORMATION
Display :
"PLAYER ID"
"SW VERSION BACK END"
"SW VERSION CDR LOADER"
(CDR775 "SW VERSION CD LOADER" )
CDR MAIN
BOARD TEST
Display : "DTST1"
DRAM test (7702)
PASS OR FAIL
Display : "DTST2"
FLASH CHECKSUM test (7702)
PASS OR FAIL
Display : "DTST3"
FLASH ERASE test (7702)
PASS OR FAIL
Display : "DTST4"
CODEC test (7702)
PASS OR FAIL
Display : "DTST5"
CDR LOADER
COMMUNICATION test
PASS OR FAIL
Display : "DTST6" *
CD LOADER
COMMUNICATION test
* FOR CDR775 ONLY
PASS OR FAIL
Tests OK?
YES
CDR779 Diagnostic Software
ABORT TEST
Press <F FWD>
ABORT TEST
Press <F FWD>
ABORT TEST
Press <F FWD>
ABORT TEST
Press <F FWD>
ABORT TEST
Press <F FWD>
NO
Display : "DERRn"
n = failed test
Display next
failed test
LOADER TESTS
ABORT TEST
Display shows current disc time
Press <F FWD>
ABORT TEST
Display shows current disc time
Press <F FWD>
DISPLAY TEST
Display segments blink at f=1kHz
KEYBOARD &
RC TEST
Display shows name of pressed keys
To end test, switch OFF unit
Figure 6-2
CDR LOADER TEST
CD-DA disc must be loaded
NO Display : "BERR1"
Test OK? "NO CDDA"
or
or "NO DISC"
YES
Press <F FWD>
CD LOADER TEST *
CD-DA disc must be loaded
* FOR CDR775 ONLY
NO Display : "BERR2"
Test OK? or "NO CDDA"
or "NO DISC"
YES
Press <F FWD>
DISPLAY TEST
Press <F FWD>
KEYBOARD & RC TEST
CL 96532086_025.eps
080999