Sharp CD-DK890N Manuale di Servizio Scaricare il pdf (Pagina 61)

CD-DK890N

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

PDOUT 1

PDOUT 0

FDO

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 88 89

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Sharp CD-DK890N Manuale di Servizio Pagina 61