Marantz MAR770 - Manual (Page 9)

7
6.3 Electrical service diagnostics
Figure 6-2
CDR MAIN
BOARD TEST
ELECTRICAL SERVICE DIAGNOSTICS
(software versions, test for defective components)
PLAYER
INFORMATION
YES
NO
Tests OK?
If power ON,
switch power OFF
Load CD-DA disc (SBC444A)
Press <PLAY> + <F FWD>
simultaneously and switch ON unit
Display :
"PLAYER ID"
"SW VERSION BACK END"
"SW VERSION CDR LOADER"
(CDR775 "SW VERSION CD LOADER")
Display : "DTST1"
DRAM test (7702)
Display : "DTST2"
FLASH CHECKSUM test (7702)
Display : "DTST3"
FLASH ERASE test (7702)
Display : "DTST4"
CODEC test (7702)
Display : "DTST5"
CDR LOADER
COMMUNICATION test
Display : "DTST6" *
CD LOADER
COMMUNICATION test
PASS OR FAIL
PASS OR FAIL
PASS OR FAIL
PASS OR FAIL
PASS OR FAIL
PASS OR FAIL
Display : "DERRn"
n = failed test
Display next
failed test
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>
LOADER TESTS
Display shows current disc time
CDR LOADER TEST
CD-DA disc must be loaded
ABORT TEST
Press <F FWD>
YES
NO
Test OK?
Display : "BERR1"
or "NO CDDA"
or "NO DISC"
Display shows current disc time
CD LOADER TEST *
CD-DA disc must be loaded
YES
NO
Test OK?
Display : "BERR2"
or "NO CDDA"
or "NO DISC"
* FOR CDR775 ONLY
ABORT TEST
Press <F FWD>
Press <F FWD>
Display segments blink at f=1kHz
DISPLAY TEST
Press <F FWD>
DISPLAY TEST
Press <F FWD>
Display shows name of pressed keys
KEYBOARD & RC TEST
KEYBOARD &
RC TEST
To end test, switch OFF unit
* FOR CDR775 ONLY
CL 96532086_025.eps
080999