BBK DK1020S - Page 113

Symptom Causes Symptom Causes
Power amplifier board: R6 not good No sound for mixed left AV: X401 joint welding
Decode board: U201 not good
(MT1389)
No sound for mixed
right
AV: C102 short circuit
Joint welding for panel light emitting
diode
No sound for centre
Power amplifier board: N12 not
good (TAS5508)
No sound front left
Power amplifier board: N4 not
good (74HCT125)
Power amplifier board: R161 not
good
Power amplifier board: R157
quality changes
Power amplifier board: R157 rosin
joint
Power amplifier board: R162 not
good
Power amplifier board: N9 not good
(TLV272)
Decode board: joint welding of flat
cable holder
Power amplifier board: R157 rosin
joint
Power amplifier board: L1 L4 not
good
Power amplifier board: R161 not
good
Power amplifier board: R107 not
good
Surround sound is
noisy
Decode board: U201 not good
(MT1389)
Power amplifier board: R106 not
good
No sound for
headphone
Power amplifier board: XS207 not
good
Microphone terminal not good
Power amplifier board: XS201 not
good
Power amplifier board: XS207 not
good
Panel: headphone holder not good
Power amplifier board: N5 not
good (CD4052)
Power amplifier board: C163 not
good
Power amplifier board: N7 rosin
joint (CS5340)
Rotate headphone
noise
Headphone terminal not good
Power amplifier board: N4 joint
welding (74HCT125)
Decode board: U214 not good
(flash)
Decode board: U201 not good
(MT1389)
Power amplifier board: N1 not good
(4558)
Decode board: U201 not good
(MT1389)
No optical and coaxial
output
Power amplifier board: N5 not
good (CD4052)
Decode board: XS206 not good
No sound for mixed left
of external input
Power amplifier board: N5 joint
welding (CD4052)
Decode board: C215 lack of element No AV output
Decode board: U201 not good
(MT1389)
AV: R103 not good
Power smplifier board: XS207 not
good
AV: XP206 shedding welding
Decode board: U201 not good
(MT1389)
Power amplifier board: N3 not good
(74HCT125)
Power amplifier board: C85 not
good
Power amplifier board: N5 not good
(CD4052)
Power amplifier board: N6 not
good (SAA6588)
Tuner not good Decode board: XS207 not good
No sound for power
amplifier
No sound for tuning No sound for tuning
Volume of mixed right is
large
Sound is noisy
One line of headphone has no sound
No sound for
headphone
No MIC
No sound for external
signal
No optical and
coaxial output
Volume of mixed
right is small
Volume of mixed left is
large