CLICK ON THE SCHEMATICS TO ZOOM IN
KEYBOARD
ALIGNMENT PROCEDURES
I. INITIAL ADJUSTMENT (No load connected)
A. OUTPUT OFFSET VOLT AGE
1.Connect a DC Millivoltmeter to L Channel speaker output
terminals.
2.Turn unit ON and adjust VR21 (100 ohms) to get the reading
of 0V+/-30mV.
3.Connect the DC Millivoltmeter to R Channel speaker output
terminals and adjust VR11 (100ohms) to get a reading of 0V+/-30mV.
B. IDLING CURRENT
1.Connect a DC Millivoltmeter to TP1 and TP2 and adjust VR22
(300 ohms) for 3-5mV reading on meter.
2.Connect the DC Millivoltmeter to TP3 and TP4 and adjust
VR12 (300 ohms) for
3-5mV reading on meter.
3.Leave power on for a minimum of 5 minutes.
II. FINAL ADJUSTMENT
Repeat procedure A and B for offset voltage and idling
current alignment respectively.
