akira HTS-393-001, Руководство по обслуживанию

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Model No.: HTS-393-001
Version: 1.0
Before repair, please make sure the local power supply is 220V~240V
SYMPTON ANALYSE
SOLUTION
CRACKING, SMALL
SOUNDS 1. If the input signal accompany with
direct current, it possibility strides
the selecting IC CD4052, then
cause the sounds cracking, and
small.
2. The electric capacitor 47
μ
F/50V
of center and surround output is
invalidation by the effects of
temperature and humidity then
sounds will be small.
3. The possible damage parts: MC
4052 and PT2315
PT2315 function: Volume control
CD4052 function: Dual 4-channel
Analog Multiplexer
4. Testing whether the IC
CD4052\PT2315 power supply
(+5.1V) is natural
Change damage parts.
HUM SOUNDS Filter electric capacitor 2200
μ
F /25V
will be invalidation when it is at high
voltage or high temperature and
humidity.
Change electric capaciton 2200
μ F /25V.
KARAOKE
ABNORMALITY The possible damage parts: IC TL084
and IC PT2399, please refer to the Tone
control Diagram.
IC TL084 (1) function: MIC volume,
MIC bass, MIC treble contron
IC PT2399 function: OK ECHO, OK
DELAY contron. Change new parts to instead of
the damage parts.
CETER AND
SURROUND
CHANNEL NO
OUTPUT The possible damage parts: IC 4053 and
IC TL084, please refer to the Tone
control Diagram.
IC 4053 function: 2 channel and 6
channel selection
IC TL084(2) function: Ceter and
Surround channel plus control Change new parts to instead of
the damage parts.