akira DM-301P, Руководство по обслуживанию

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5
Model No.: DM-301P
Version: 1.0
TROUBLE SHOOTING
1. There is smutch on the touching point of battery chip, or the chromed
place of it affects the function due to serious rusting. (Judgment: keep
pressing the ‘turn-on’ key, the voltage between negative of diode (D1
1N4002) and cathode of battery chip is lower than 2.3V.
2. Power socket (DC2) is damaged (bad touching between 2 pin and 3
pin)
。
(Judgment: bad connection between cathode of battery chip and
power).
3. Capacitance on main board 30 C35 (1UF/0603) is bad or its capacity is
low.
4. Amplifier multiple of main board Q3 (S8050D) is less than 200.
Batteries can’t play
CD
Correction process:
Check battery chip
Clean the smutch or change
battery chip
Check power
socket
Change power socket
Check the
capacitance of
C30C35 on main
board
Change capacitance
Check Q3 on main
board
Change dynatron
OK
Yes
Yes
Yes
Yes
OK
OK
OK
OK
NG
NG
NG