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Main Amplifier; Power Supply Unit - Marantz 4230 Service Manual

Stereo 2 + quadradial 4 receiver
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13.
MAIN AMPLIFIER
14.
BTL
(Balanced Transformerless) CONNECTION
15.
POWER
SUPPLY
UNIT
16.
AUDIO
TROUBLE
ANALYSIS
1, Excessive line consumption
a.
Check for shorted rectifiers HOO7.
b. Check
for shorted transistors HOO1 through HO04.
Check O01 for short.

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