Daewoo NC-8913 Service Manual page 9

1
Trouble Shooting Guide
MP3/CD Section
3
4. Focusing operation
3
Focusing
operation
4
Yes
5. Spindle motor rotation
5
Spindle motor
rotation
6
Yes
7
6. Read in CD/MP3 disc operation
Yes
8
Read in CD/MP3
9
disc
Yes
7. Read in USB file and USB Encoding operation
Read in USB file
operation
Yes
USB Encoding
1. Check (IC502 SA5888 of 13pin and 14pin)
13pin 3.95V >>3.99V, pin18 3.72V >> 3.75V >>>
no
in case of play.
2. Check +1.58V(IC500 M5673 or M5675 of 126pin).
1. Check SPDO +1.90V(IC500 M5673 or M5675 of 123Pin)
no
in case of play。
2. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,
SL+ 3.91V.
3. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,
SP- 3.41V
1. Check CN704
2. Check IC701 of 38pin and 39pin and 40pin
41pin and 44pin.
no
3. Check CN502,CW504.CN505
4. Check IC504 of 3pin:5.0V
5. Check Q501 collector:+3.3V
6. Check +3.3V (IC500 pin8/18/23/25/38/57/85/113/116/122)
7. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,
SP- 3.41V
8. Check SPDO +1.90V (IC500 M5673 or M5675 pin123)
9. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,
SL+ 3.91V
10. Check CD Board(Around IC solder short,cold soldering )
1. Check IC500(M5673 or M5675) of 52pin and 53pin.
2. Check CW507,CN707.
no
3. Check J702.
1. Check IC500 (M5675) of 52pin and 53pin.
2. Check CN502 7pin 8pin and 9pin.
3. Check IC500(M5675) 40pin,43pin input signal.
no
4. Check IC500(M5675) 33pin,36pin output signal.
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