SHARP XL-30V
Manual de Servicio

XL-30V
� Laser abnormal
Is +6.2V on the emitter of Q861? Yes Is +5V on the collector of Q861? Yes Is +5V on the 64 pin (VDD) of IC802? No Yes Is +5V on the 6 pin, the 43 pin and the 51 pin (DVDD) of IC802, the 15 pin (PVDD), the 25 pin (AVDD), the 39 pin (AVDD3)? Yes Is 0V on the 38 pin (SEL) of IC802? No Yes Yes No Check the pattern between IC806 and IC802 (BUCK/CCE/ BUS0-3). Check the parts around IC801 and Q801. If normal, the pickup is defective. Check the PWB pattern among the collector of Q861 and the 6 pin, the 43 pin, the 51 pin, the 15 pin, the 25 pin, the 39 pin of IC801. Does laser light on when cutting the pattern between the 38 pin (SEL) of IC802 and the 8 pin (SEL) of IC801? No No Check the PWB pattern between the 2 pin of BI605B/ CNS605B and the emitter of Q861.

Check around IC804 and Q861.

Check the PWB pattern between IC807 and the 64 pin of IC802.

No

Is approx. 2V on the collector of Q801? No Yes Check BI802/CNS802. If normal, the pickup is defective.

� NO DISC display
Does RF waveform of approx. 1.3V (P-P) appear on the 22 pin (RFO) of IC801? Yes Does eye pattern appear on the 24 pin of IC802? Yes Check around IC802. If OK, IC802 is defective. � The Video CD cannot be played normally. Whilst the disc is playing, is a signal being supplied to pins 96 ~98 on IC15V? (Refer to the waveform shown in Figure 45.) Yes Does the image freeze sometimes? Yes The disc has flaws in it or it is dirty. The disc itself has a defect. The data is faulty. IC804 is defective. No (Not displayed)
2µs / d

No

IC801 or BI801/CNS801, BI802/CNS802 is defective. Or the pickup is defective.

Check around IC801. If OK, IC801 is defective. No

No

IC802 is defective.

96 pin TDMCLK 97 pin TDMDR 98 pin TDMFS

Figure 45 � 45 �