Sharp cd xp 200h troubleshooting
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Extracted text from sharp cd xp 200h troubleshooting (Ocr-read)
Page 1
CD-XP200H Ð 38 Ð Vp-p=1.0 V~1.3 V 0.5 mV/div,0.5 µsec/div T FDO DRF TE StoppedCH1=500 mV DC 10:1CH2=10 V DC 10:1CH3=1 V DC 10:1500 ms/div (500 ms/div) NORM:20 kS/s 1 2 3 =Record Length= Smoothing : ON CH1 : 0.000 V CH2 : 0.0 VMain : 100 K Zoom : 2 KMode : AUTO Type : EDGE CH1 Delay : 0.0 ns Hold off : 0.2 µs CH3 : 0.00 V CH4 : 0.00 V BW : FULL =Trigger= =Filter= =Offset= -3 div -1 div 0 div +1 div +3 divCH Position ToCH2 Position 0.20 div T FDO TDO StoppedCH1=500 mV DC 10:1CH3=500 mV DC 10:1500 ms/div (500 ms/div) NORM:20 kS/s 1 3 =Record Length= Smoothing : ON CH1 : 0.000 V CH2 : 0.0 VMain : 100 K Zoom : 2 KMode : AUTO Type : EDGE CH1 Delay : 0.0 ns Hold off : 0.2 µs CH3 : 0.000 V CH4 : 0.00 V BW : FULL =Trigger= =Filter= =Offset= CH1 v/DIV 500 mV If the level is not normal. 1. Is focus servo activated ? (Waveform drawing Figure 38-2) Pins 7~11, 79 and 80 on IC1 Check the laser diode driver Q1 peripheral circuit. When a disc is loaded, start playback operation. 2. Does DRF change from "L" to "H" ? Is the disc rotating ? 3. Is the HF waveform normal ? (Waveform drawing Figure 38-3) Check the spin system. If the disc is spinning and a HF waveform is generated, DRF will go H. Figure 38-1 Check the laser diode driver Q1 peripheral circuit. (1) Focus-HF system check. Although a CD is inserted and the cover is closed, "NO DISC" is displayed. 1. Does the pickup move to the PICKUP-IN Switch (SW4) position ? Sled motor (M2). Press the OPEN/CLOSE switch (SW1) without inserting a disc, and try starting the playback operation. 2. Does the focus (lens) move up and down ? (Waveform drawing Figure 38-1) Check the focus peripheral circuit. 3. Is the laser lit ? Spindle motor (M1). 4. Is the turntable rotating ? Figure 38-2Figure 38-3 Yes Yes YesNo No No No No No No Yes YesNo
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Ð 39 Ð CD-XP200H T T FDO SPDO StoppedCH1=200 mV DC 10:1CH2=500 mV DC 10:1500 ms/div 1999/04/07 09:51:15 (500 ms/div) NORM:20 kS/s 2 1 =Record Length= Smoothing : ON CH1 : 0.000 V CH2 : 0.000 VMain : 100 K Zoom : 2 KMode : NORMAL Type : EDGE CH2 Delay : 2.924 ms Hold off : 0.2 µs CH3 : 0.00 V CH4 : 0.00 V BW : FULL=Trigger= =Filter= =Offset= T T TE DRF StoppedCH1=10 V DC 10:1CH2=1 V DC 10:1100 ms/div (100 ms/div) NORM:100 kS/s 2 1 =Record Length= Smoothing : ON CH1 : 0.0 V CH2 : 0.00 VMain : 100 K Zoom : 2 KMode : NORMAL Type : EDGE CH1 Delay : 2.924 ms Hold off : 0.2 µs CH3 : 0.00 V CH4 : 0.00 V BW : FULL=Trigger= =Filter= =Offset= The tracking servo is not activated. Check the peripheral circuits at pins 14, 15 and 20 on IC1, and CNS1A/B. If the waveform shown in Figure 39-1 appears and soon after NO DISC appears ? (2) Tracking system check. Check the TE waveform at pin 15 on IC1. A normal jump operation cannot be completed or the beginning of the track cannot be found. Check the around pin 20 on IC1. "Initialization" is possible, but play is not possible ? Data cannot be read. Check the VCO-PLL system. "Initialization" is not possible. Figure 39-1 Figure 39-2 Press the OPEN/CLOSE switch without inserting a disc, and then try starting the play operation. (3) Spin system check. The spin driver circuit is OK. 1. The turntable rotates a little ? (Waveform drawing Figure 39-2) Check around pin 22 on IC1, pins 15 and 16 on IC3, and CNS3A/B. 2. The turntable doesn't rotate. NoYes NoYes Yes No