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 +
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
ABORT TEST
Press
ABORT TEST
Press
ABORT TEST
Press
ABORT TEST
Press
LOADER TESTS
Display shows current disc time
CDR LOADER TEST
CD-DA disc must be loaded
ABORT TEST
Press
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
Press
Display segments blink at f=1kHz
DISPLAY TEST
Press
DISPLAY TEST
Press
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