Daewoo EKE Service Manual page 14

1
Trouble Shooting Guide
MP3/CD Section
2
5. Spindle motor rotation
Spindle motor
3
rotation
4 Yes
6. Read in operation
5
Read in
operation
6
7
Yes
8
9
Read in CD/MP3
disc
Yes
Read in USB file
Yes
USB Encoding
1. Check SPDO +1.9V(IC501 LC786951 41pin) >>> in
no
case of play。
2. Check IC503 BA5927FM 20pin SL+ 4.7V,
19pin SL- 4.5V.21pin SP- 4.3V, 22pin SP+ 4.8V。
1.Check RFO eye pattern 0.8V ~ 1.2V (IC501 LC786951
no
8pin)
1. Check +9V(CN509 of 4pin).
2. Check +3.3V (IC501 of 59pin,80pin,109pin,124pin).
3. Check XC501:16.9344MHZ
4. Check (IC503 BA5927FM 21pin,22pin)SP- 4.3V , SP+ 4.8V
no
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 +3.3V(IC502 LC87F1HC8A 3pin, 8pin,19pin,39pin)
no
2. Check XC502:12MH
3. Check CD Board(IC504 Around pin solder short,
cold soldering )
1. Check IC506 (NJM4558) 4pin(-9V),8pin(9V).
2. Check IC506(NJM4558) 3pin,5pin input signal.
3. Check IC506(NJM4558) 1pin,7pin output signal.
no
4. Check IC505(AK5358) 6pin(5V),7pin(3V).
5. Check IC505(AK5358) 1pin,2pin input signal.
6. Check IC504(A2V64S40CTP) Around pin solder short,
cold soldering )
RF:0.8V ~ 1.2V
Z
1
2
3
4
5
6
7
8
9