SONY XM1902GX
Manual de Servicio

SECTION 3 ELECTRICAL ADJUSTMENT
Bias Adjustment
Note : The Bias adjustment should be performed only if any of Q108 to Q113 and Q208 to Q213 are replaced. Setting :
B+,REM terminal

set Stabilized Power suppy GND terminal

Procedure : 1. Rotate the variable resistors RV105 and RV205 fully in the clockwise direction to minimize the idling current of the stabilized power supply. 2. The input signal is to be no signal. 3. Set the power voltage to +14.4 V, and turn the remote mode ON (Connect between the REM terminal and B+ terminal). 4. Adjust each of RV105 and RV205 so that the power current of the stabilized power supply is increased in steps of 500 mA for the XM-1502SX and in steps of 600 mA for the XM-1902GX. Adjustment Location : Main board (component side)
� MAIN BOARD (COMPONENT SIDE) �

RV105 BIAS ADJUSTMENT

RV205 BIAS ADJUSTMENT

8