Fault Finding Guide - Philips CDR880 Service Manual

20
FAULTFINDING GUIDE
NO DISC
POWER ON
CHECK:
l/ ~POWER SUPPLY
MAINS SWITCH 1106
DISC NO
DETECTION FUSES
al
MAINS TRANSFORMER
VOLTAGES AC, DC, FTD
WIRING
ie DISPLAY
= POWER SUPPLY VOLTAGES
= CLOCK FREQUENCY 8MHz
= CONTROL LINES
= WIRING
= ELECTRICAL SERVICE DIAGNOSTICS:
DISPLAY TEST
= SEE MEASUREMENTS DISPLAY
: @
YES
DISPLAY SHOWS BLINKING "SERVICE"
HECK:
POWER SUPPLY VOLTAGES -12V, -8V
ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF ERROR OCCURS
DISPLAY NO
SHOWS
"NO DISC'?
YES
PRESS
OPEN/CLOSE
CHECK:
ie ~=ELECTRICAL SERVICE DIAGNOSTICS:
KEYBOARD TEST: OPEN/CLOSE SWITCH ON
DISPLAY BOARD.
IF OK, REPLACE CDR MODULE
val
YES
LOAD DISC
PRESS OPEN/CLOSE
NO SEE CD-RW DISC
CDDA DISC? FAULTFINDING
Yes | - YES
SEE CDDA DISC SEE CD-R DISC
FAULTFINDING FAULTFINDING
al
PCS 83 981