Rautz MC-5100DU Service manual - page 11
Trouble Shooting Guide
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AC cord in
Yes
No
Yes
No
Power ON/OFF ON
Function to CD and
Initializing CD
1.Check SW801
2.Check J901(AC ADAPTER)
3.Check IC504
4.Check CW901
1. Check IC503 of 3pin VCC :+5V
2. Check Q501 collector:+3.3V
3. Check IC500(M5673) of 8/18/23/25/38/57/85/
113/116/122 pin VCC:+3.3V
4. Check IC502(SA1469PH) of 11/12pin:SP+ 4.1V /SP- 3.9V
5. Check IC500 (M5673) of 123 pin(SPDO) VCC: +1.8V
6. Check IC502(SA1469PH) of 1/2 pin:SL- 3.5V/SL+ 3.6V
7. Check CD Board(Around IC solder short,cold soldering )
8. Check CN501/CN504.
Yes
No
CD close and CD on
1. Check CW505/CN505
2. Check SW505
Yes
No
Laser diode on
1. Check +1.8V LD on (HQ500 collector)
2. Check +2.1V (HQ500 base pin) >>>in case of play
E
C
B
Stop Play
C 0 V 1.8 V
B 3.3 V 2.1 V
E 3.3 V 2.8 V
(HQ500)
1
Pick-up unit return
2
CD open and disc insert
3
Laser diode on
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MP3/CD Section 2