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7 Troubleshooting Guide
7.1.
Troubleshooting Flowchart
Use the flowchart below to verfiy malfunctions of the unit.
1. Turn on the power of main set.
2. Press and hold the power button for 4 seconds then FL display will show RESET for 2 seconds.
3. Turn off the power.
1. Turn ON main set.
2. Press main set [Volume -] button, then continue press the [Volume -] & [Volume +] of remote control. FL display will show "
3. Go in the desired option of doctor mode by pressing the button on remote control. (Refer to Doctor Mode Table of HTB885)
4. After turn off the power, you can exit from Doctor Mode.
Main set power ON
P
o
w
r e
d
o
n
t o
u t
n r
O
N
(No FL display)
Power input but turn off immediately
Power input but FL display error
Fuse cut
After replacement, cut again at outlet
connection
After replacement, cut again at power on
Check the all segments display by Doctor
FL display checking
Mode
Tap device on NFC logo and follow
NFC Checking
connection steps.
Audio confirmation
No audio output (OPT input 1 system)
No audio output (HDMI input 1 system)
No audio output (HDMI/ARC support)
No sound from main soundbar unit front
speaker
Subwoofer (SB-HWA880) sound skip
Subwoofer (SB-HWA880) no sound
Sub Woofer
Wireless link light checking
SB-HWA880
(SB-HWA880 upper left front)
P
o
w
e
r ON by remote control
OK
Check the cable connection from Button PCB to Main PCB.
Check wire condition of Button PCB to Main PCB cable
Button IC operation check.
Power ON by remote control
NG
Check the connection of FFC connector
Check the power supply output of SMPS
Check the AC inlet and AC cord
Check fuse cut
Error contents
F
7
6
P
o
w
r e
o
f f
h t
e
u
n
t i
d
r u
n i
Error contents
F
6
1
P
o
w
r e
o
f f
h t
e
u
n
t i
d
r u
n i
Error contents
F
7
0
B
T
B
n i l
k
n i
g
i w
h t
2
5
0
m
s
O
N
Error contents
F
7
0
D
A
P
B
n i l
k
n i
g
i w
h t
2
5
0
m
s
O
N
Error contents
F
7
0
H
D
M
I
B
n i l
k
n i
g
i w
h t
2
5
0
m
s
O
N
Error contents U701/703/704
Blinking with 250ms ON / 250ms OFF repeatedly unless user power off.
The primary side of main power supply
Check the continuity of primary side power circuit
abnormal
The secondary side of main power supply
Check the continuity of secondary side power circuit
abnormal
Some FL segment not lighting
Failure of FL Display (FL3300)
Bluetooth paired
B
u l
e
o t
o
h t
n
t o
p
i a
e r
d
C
h
e
k c
a
g i l
n
m
e
t n
f o
tapping on NFC logo during conenction.
NFC IC operation check.
HDMI input (1 system) voice appear
Check the OPT terminal
O
P
T
1 (
s
s y
e t
m
)
o v
c i
e
a
p
p
e
r a
T
h
e
a f
u l i
e r
f o
n I
p
t u
HDMI cable DSP systems
OPT (1 syst
e
m
)
o v
c i
e
a
p
p
e
r a
C
h
e
k c
h t
e
A
R
C
i c
c r
u
t i
S
u
b
w
o
f o
r e
o v
c i
e
n
r o
m
l a
T
h
e
a f
u l i
e r
t a
D
g i
t i
l a
A
m
F
o r
t n
s
p
e
a
k
r e
o v
c i
e
n
r o
m
l a
C
h
e
k c
h t
e
a r
d
o i
w
a
e v
n i
F
o r
t n
s
p
e
a
k
r e
o v
c i
e
n
r o
m
l a
C
h
e
k c
h t
e
m
a
n i
u
n
t i
&
G
e r
e
n
g i l
h
s t
u
p
C
h
e
k c
h t
e
s
u
b
w
o
f o
r e
D
R
e
d
g i l
h
s t
u
p
C
h
e
k c
h t
e
b
o r
k
e
n
n i l
s k
Check the pairing status
Check cable connection at 8P connector (CN6103) of Button PCB.
Check cable connection at 8P connector (CN6104) of Main PCB.
Check continuity of the 8P Button PCB to Main PCB cable wire from one end to another.
Check waveform of Button IC. Check INT1 (pin 3) signal. When touch is detected, INT1 will have a pulse
from high (3.3V) to low (0V); without touch, INT1 = 3.3V to 3.5V.
Voltage check 1 +F to -F (filament voltage across FL pin 1 to pin 37) = about 2.8V, 2) VH = about 33V (FL pin 7 to GND),
3) VDD = about 3.3V (FL pin 18 to GND)
wire [Main PCB]-[Panel PCB]
If set have no power and display, check [Panel] CN3300(4)
Check 7P connectors CN1 [Switching power module] and CN2004 [Main] and wire connection.
[Switching power module] CN1(6 or 7)
Check Switching power module AC inlet solder condition and AC cord insertion condition.
Check the continuity of [Switching power module] F1.
g
F
L
b
n i l
king of F76 (250ms ON/250ms OFF).
Check each DC supply output voltage (eg +13V, +6V, +5V, +3.
g
F
L
b
n i l
king of F61 (250ms ON/250ms OFF).
Check the IC overcurrent overheating failure of [Digital Amplifier]
/
2
5
0
m
s
O
F
F
e r
p
e
a
e t
d
y l
u
n
e l
s s
u
s
r e
p
o
w
r e
o
. f f
[Main] BT & communication error of the microcomputer
/
2
5
0
m
s
OFF repeatedly unless user power off.
[Main], IC of [Digital Amplifier] DAMP & communication error of the microcomputer
/
2
5
0
m
s
O
F
F
e r
p
e
a
e t
d
y l
u
n
e l
s s
u
s
r e
p
o
w
r e
o
. f f
[Main] IC of HDMI & communication error of the microcomputer
Try once to "On / Off" the power of the connected device. Try to connect or disconnect the HDMI cable.
Short-open power transformer, electrolytic diode IC · [switching power module].
(D5701, C5712, IC5701, T5701)
Short-open power-electrolytic IC diode [switching power module]
(D5802, C5805, IC5801)
Change to a new FL Display (FL3300) on the panel PCB.
Check location of tapping, make sure tapping is done on NFC IC location of device to the NFC logo location of sound bar.
Check NFC_IRQ (pin 3) signal. When NFC connection is detected, NFC_IRQ will have a pulse from high (3.3V) to low (0V);
without touch, NFC_IRQ = 3.3V to 3.5V.
OPT cable
Check the optical jack JK3004 (1)
Check the [HDMI]-[Main Digital Amplifier] 30P FFC connector
a f
u l i
e r
HDMI cable
Check the [HDMI]-[Main Digital Amplifier] 30P FFC connector
p
f i l
e i
. r
Check IC5300, IC5400, IC5500 supply voltage (pin 2 to pin
e t
rference of other wireless equipment (2.4GHz band)
Subwoofer & other equipment need to put away more than 2 meter
Failure of (transmitter / receiver) radio board
s
u
b
w
o
f o
r e
i w
e r
e l
s s
c
o
n
n
e
t c
o i
n
Failure of (IC5200 D amplifier [Digital Amplifier] subwoofer
a
m
p
i f i l
r e
i c
c r
u
t i
"On / Off" power of the amplifier unit / subwoofer, connect or disconnect of the subwoofer power cord,
f o
i w
e r
e l
s s
c
o
n
n
e
t c
o i
n
Execute pairing procedure of suibwoofer with main set
Failure of (transmitter / receiver) radio board
19
3.3V. If set can power ON but no display, check [Panel] CN3300(7)
. Check 15P FFC connectors CN3300 [Panel] and CN2008 [Main] and wire connection.
7V (at standby); 20V or 30V (at power ON), [Main] IC2202 (4)
3.6V to
+3.3V,+1.8V)
[Digital Amplifier] exchange.
[Main] board exchange or [BT] module exchange.
[Main] board exchange.
[Main] board or [HDMI] board exchange.
3.3V output (3) SPDIF waveform.
the voltage should be around 12V.
5V,
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Troubleshooting
