Read Sharp QT-CD180 (serv.man3) Service Manual online
QT-CD180H/QT-CD180W
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1. In Power OFF state, set the Function switch to ON, keeping to be pressed the "Stop" and "Up" button at same time.
After CD initialize finish. The CD TEST mode is set, and the LCD indicate to the total tracks of the disc. Release the PLAY button.
The CD TEST mode is set when the LCD indicate to " 1".
Then cut the above circuit.
Then cut the above circuit.
2. In above TEST mode state, press once the PLAY button.
The laser is light up when LCD indicate to "cd".
SETTING METHOD FOR LASER LIGHT UP
Figure 13
SETTING FOR MAXIMUM LASER POWER
1. In above laser light up state, adjust the variable resistor (VR1A) on pickup PWB to maximum laser power.
Maximum laser power : Rotate the variable resistor (VR1A) to clockwise.
Note :
The TEST mode is cleared by Power OFF.
The TEST mode is cleared by Power OFF.
PICKUP UNIT
Variable Resistor
VR1A
VR1A
Pickup PWB
