XL-HP737 (serv.man4) - Sharp Audio Service Manual (repair manual). Page 6

XL-HP737

2 – 2

2) Tracking balance adjustment

3) Gain adjustment (The gain is compensated inside the IC so that the

loop gain at the gain crossover frequency will be 0 dB.)

*

Focus gain adjustment

*

Tracking gain adjustment

*

'CHECKING'

If Error is detected, 'CHECKING' will be displayed instead of 'ER-
CD**'. 'ER-CD**' display will only be displayed when error had been
detected for the 5th times.

01

When Pickup set inner position, inner switch cannot detect 
'ON' level for 10 secs.

10*

CAM error. Can't detect CAM switch when CAM is moving. 

11*

When it detect cam operation error during initialize process.

20*

TRAY error. Can't detect TRAY switch when TRAY is mov-
ing.

21*

When it detect TRAY operation error during initialize pro-
cess.

31

When it change to CD function, DSP cannot read initial data.