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6
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Model No.: HTS-898-266
Version: 1.0
4. Front panel loses control, can not choose the input signal
Analyse:
a. Be interfered by strong electromagnetism or wavy power supply.
b. The working voltage is too high, or IC BA5049/LM324 is losing control by the temperature
and humidity.
c. The possible damage parts : IC BA5049, CD4052 and LM324 , please refer to the
Front panel control Diagram
IC BA5049 function : Remote receiver and decoder
CD4052 function : Dual 4- Channel Analog Multiplexer
LM324 function : Quad Operational Amplifier, VFD display driver.
Solution:
Testing whether the IC working voltage (+5.1V) is natural.
Change new parts to instead of the damage parts
Place the player in the place without electromagnetism interfering.
Operate the player at a steady-voltage.
5. The parts big power transistor C5196 burn out
Analyse:
a. Refer to Amplifier Diagram to change the possible damage parts which caused by C5196
burnout. (Test by digital multimeter to make judgement whether the parts are workable or
not)
b. Series-wound connect one 40W bulb at the wavy power supply 220V/240V, it will react on
protecting when you are repairing.
c. C). Make sure changed all of the damage parts, then electrify, power on .
d. If the 40W bulb suddenly shinny, then dinginess slowly ( It indicates that the player is
work normally). If the bulb is shinny all the way, then there is still some short circuit on
the PBC, please recheck there is any other damage parts).
