Text preview for : amc_cdm7_laser_adjustment_procedure-01b.pdf part of AMC CDM7 amc_cdm7_laser_adjustment_procedure-01b
Back to : amc_cdm7_laser_adjustment | Home
AMC CDM7
LASER ADJUSTMENT PROCEDURE
ADJUSTMENT POINTS DIAGRAM:
LASER CURRENT ADJUSTMENT:
The integrated circuitry used in the CD PCB eliminate the need for most adjustments by incorporating
self adjusting circuitry. However, when parts in the servo circuitry or CD mechanism are replaced, a
laser current adjustment should be performed. Please follow the steps below:
1. Insert the test disc (Sony Type 4, YEDS 18).
2. Make sure the power is turned OFF.
3. Connect a high impedance voltmeter across the test points labelled LASER ADJ.
4. Turn the power ON and press the Play button.
5. When track 1 starts playing, adjust R127 to 50mv +/-2mV specification.