Daewoo EKE Service Manual page 13

Trouble Shooting Guide
1
MP3/CD Section
2
1. Pick-up unit return and roulette rotation
3
AC cord in
Yes
4
Initializing CD
5
Yes
6
CD open and disc
insertion
7
2. CD open and disc insert
CD open and
8
disc insertion
Yes
9 9
CD close and CD on
3. Laser diode on
Laser diode on
Yes
Focusing operation
4. Focusing operation
Focusing
operation
Yes
1. Check +9V(CN509 of 4pin).
2. Check +3.3V (IC501 of 59pin,80pin,109pin,124pin).
3. Check XC501:16.9344MH
no 4. Check (IC503 BA5927FM 21pin,22pin)SP- 4.3V , SP+ 4.8V
5. Check SPDO +1.9V (IC501 LC786951 41pin)
6. Check (IC503 BA5927FM 19pin, 20pin)SL- 4.5V,SL+ 4.7V.
7. Check CD Board(Around IC solder short,cold soldering )
1. Check +9V (IC503 BA5927FM 7,8pin)
no
2. Check +3V (IC503 BA5927FM 31pin)
1.Check +3V (IC503 BA5927FM 30pin)
no
1. Check +1.8V LD on(HQ506 collector)
no
2. Check +2.5V (HQ506 base pin) >>>in case of play
E
B
C
(HQ506)
1. Check (IC503 BA5927FM 1pin, 2pin)
1pin 3.9V >> 4.3V, 2pin 4.5V >> 4.9V >>> in case
no
of play
2. Check +1.95V(IC503 BA5927FM 6pin)
Z
STOP PLAY
C 0V 1.8V
B 3.3V 2.5V
E 3.3V 3.2V
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