Daewoo AKF-3825 series, Service Manual

Page: 6 / 46

4
3. EMERGENCY TROUBLE SHOOT
3-1. General Function
No sound from
speakers
Yes
No
Yes
Output connector
is missing
Output connector
is inferior goods
Put exactly output
connector in.
Change output
connector to
superior goods
Yes
No
Power IC, Output
Socket is inferior
goods
Change Power IC,
Output Socket to
superior goods
Yes
A
A
L.C.D or L.E.D
is not turned
off.
Yes
No
Yes
Power is not
supplied
Ref. Point
Output voltage of
power IC is little.
Change Regulator
IC and check
output voltage.
Yes
No
LCD or LED is
inferior goods.
Change LCD or
LED to superior
goods.
Yes
Different each
channel have
output level
(Front, Rear,
Left, Right)
Treble or Bass
is low
unusually
Yes
No
Yes
Balance of front
and rear is in one
side
Balance of Left,
Right is in one
side.
Re-adjust Balance
of front, rear
Ref. Balance = Center
Front:00 / Rear:00
Ref. Balance = Center
Left:00 / Right:00
Ref. Balance = Center
Treble:00 / Bass:00
Ref. Regulator IC output
Voltage = V
Ref. Electrical Parts List
L.C.D., L.E.D.
Re-adjust Balance
of Left, Right
Yes
Yes
Balance of Treble
or Bass is in one
side.
Re-adjust Balance
of Treble or Bass
Yes