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Trouble Shooting(main unit)
A
B
Power Supply
Standby LED
red light is not bright
No Working
A
Standby LED
red light is not bright
YES
Check touch to main board
Re-insert and fix
4pin cable is loose
the cable
or bad INT
NO
bad
check red LED D1 part
replace the bad part
fine or bad
B
Power Supply
No working
ok
check DC in 21V
NO
bad
Check DCIN JACK
replace the bad part
CJP901 OK or bad
NO
Replace the Adaptor
All manuals and user guides at all-guides.com
3 - 1
MAIN UNIT REPAIR CHART 1/2
C
D
E
All Function
Didn't power ON
AUX IN
No Sound
No Output
C
Didn't power ON
NG
check B
OK
NG
Check A
OK
Check power IC
No
Check IC904 FB902 L903
voltage BK5V
And Its conn parts
OK
No
Check power IC
Check IC908 FB903 L903
voltage BK33
And Its conn parts
OK
Check power IC
No
And Its conn parts
voltage BK1.2V
OK
No
Check power ON/OFF
Check IC201 pin10
control
And Its conn parts
F
G
Wireless
optical&COAXIAL IN
No Output
No Sound
D
All Function
No Sound
Yes
No
Check POWER IC
As per B Repair
Voltage +21V
OK
NO
Check I2S output
As per A Repair
OK
No
Check AMP IC PDN
PIN19 Voltage 3.3V
OK
No
Check AMP pcb
Voltage VD33
OK
Check IC501 IC502
Check IC906
And Its Conjoint Part
3 - 1
H
I
J
USB
Audio line IN
Bluetooth No Output
No Sound
No Sound
E
AUX IN
No Output
Check JK304 RB301
INT
See Contents B
CN303 INT or No
OK
Check IC303 Pin16
No
Check IC201I2S pin
approx +4.6V
Yes or No
And Its conn parts
Yes
Check IC501 IC502 PIN19
No
And Its conn parts
Check IC302 Pin10 +5V
OK
Check IC905 L902 FB905
And Its conn parts
Check IC302 IC201
And Its Conjoint parts
K
HDMI ARC
No Output
Change this jack
Check Q303 R360
Check L301 C332
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