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Panasonic SA-PM65MD - Before Repair and Adjustment; Protection Circuitry

Panasonic SA-PM65MD
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Standby
ECO
0.8 W
NORMAL
8.5 W
Dimensions (WxHxD)
Panels closed
210x140x365 mm
Panels open
210x159x399 mm
Mass
4.7 kg
Notes :
1. Specifications are subject to change without notices. Mass
and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
* US and foreign patents licensed from Dolby Laboratories.
System: SC-PM65MD (EB)
Music Center: SA-PM65MD (EB)
Speaker: SB-PM65 (EG)
System: SC-PM65MD (EG)
Music Center: SA-PM65MD (EG)
Speaker: SB-PM65 (EG)
2000 Matsushita Electronics (S) Pte. Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.
1. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C905, C910 through a 10 , 5W
resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may
destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
[EG]
- Current consumption at AC 230V, 50 Hz in NO SIGNAL mode
should be ~160mA.
[EB]
- Current consumption at AC 240V, 50 Hz in NO SIGNAL mode
should be ~160mA.
2. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
- No sound is heard when the power is turned on.
- 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
3

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