Sharp XL-DK255 Service Manual - Page 57

PLL system check.

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(4) PLL system check. When a disc is loaded, start play operation. The RF waveform is normal, but the TOC data cannot be read. Check the PDOUT waveform. (Figure 6) Check around pins 26~30 on IC1. 6 28 IC1 7 27 IC1 1 22 IC1 PDOUT 0 PDOUT 1 FDO Figure 6 XL-DK225 7 - 4

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XL-DK225
7 – 4
(4) PLL system check.
When a disc is loaded, start play operation.
The RF waveform is normal, but the TOC data cannot be read.
Check the PDOUT waveform. (Figure 6)
Check around pins 26~30 on IC1.
Figure 6
IC1
IC1
IC1
28
22
27
1
7
6
PDOUT 1
PDOUT 0
FDO