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2. Before Repair and Adjustment
1. Turn off the power supply. Using a 10
power supply capacitors (C608,625,707,714) in order to discharge the voltage.
2. Before turning the power supply on, after completion of repair, slowly apply
the primary voltage by using a power supply voltage controller to make sure
that the consumed current at 50/60 Hz in NO SIGNAL mode should be shown
below withrespect to supply voltage 230 V/240 V.
Areas
Power supply voltage
Consumed current
3. About the Protection Circuitry
The protection circuitry may have operated if either of the following conditions is
noticed:
*No sound is heard when the power is supplied.
*Sound stops during a performance.
The functions of this circuitry is to prevent circuitry damage, for example, the
positive and negative speaker connection wires are "shorted", or if speaker
systems with an impedande less than the indicated rated impedance of thisunit
are used.
If this occurs, follow the procedure outlined below:
(E,EG)
AC 230V
50 Hz
150-250 mA
, 10W resistor, connect both ends of
(EB,GN,GCS)
AC 240V
50 Hz
150-250 mA
5
(GD)
AC 220V
60 Hz
150-250 mA
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