Technics SA-X800L - Protection Circuitry; Before Repair and Adjustment

m@ PROTECTION CIRCUITRY
The protection circuitry may have operated if either of
the following condition is noticed:
e No sound is heard when the power is turned on.
e Sound stops during a performance.
The function of this circuitry is to prevent circuitry
damage if, for example, the positive and negative
speaker connection wires are “shorted”, or if speaker
systems with an impedance less than the indicated
rated impedance of the amplifier are used.
@ BEFORE REPAIR AND ADJUSTMENT
1. Turn off the power, Discharge both power supply
capacitors (C702, C703 3300yF) through a 10Q 5W
resistorto ground. Do not short between C702 and
C703. It may damage the capacitors.
Mi DISASSEMBLY INSTRUCTIONS
Power supply voltage AC 220V | ac2aov |
50/60Hz 60~160mA 50~150mA
If this occurs, follow the procedure outlined below.
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again.
Note:
When the protection circuitry functions, the unit will
not operated unless the power is first turned off and
then on again.
2. After completion of repair, slowly apply the primary
voltage by using a variac to avoid overcurrent. Cur-
rent consumption at 50Hz/60Hz in no signal mode
should by shown with respect to supply voltage
220V/240V.
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No.
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How
to
remove
the
cabinet
si
How
to
remove
the
rear
panel
*
Remove
the
10
screws
(@~@).
eae
¢
Remove
the
10
screws
(O~@).
Cabinet
Rear Panel