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4. Troubleshooting
„
SMPS POWER
1.
Power TV On.
√
. 2Vdc (when off) changes to 3.3Vdc (on)
PS_ON
May already be On if IoT USB is loaded or TV Smart Things Hub mode is active.
-
if voltage error or no change.
2.
√
Jog Function Control Test.
If OK replace Main Board.
3.
√
All
A13V
supplies to full voltage level 12.7VDC.
If any wrong voltage, remove the SMPS connector to Main Board.
4.
√
A13V again for 12.7VDC.
If OK replace Main Board.
5.
If still wrong voltage replace SMPS.
6.
√
(Over Voltage Detect) : 3.3Vdc (Operating Normal)
OD
If 0V or changing, an SMPS or Panel error exists.
7.
Perform Backlight Test.
8.
√
Backlight On/Off
√
If missing/error replace
49" / 55" SMPS Front
1
GND
2
5
4
GND
8
7
Vamp
10
Fail Count
11
13
A13V
14
16
PS_ON/OFF
17
19
GND
20
22
PWM7
23
25
PWM4
26
28
29
PWM2
1
IF2
2
IF1
5
5-
1-
6
9
2-
10
6-
13
3-
14
7-
18
8-
17
4-
4-4
0V Off to 5Vdc ON.
Main Board.
CNM803
GND
3
GND
Vamp
6
GND
OD_Level
9
Vamp
OD_ON/OFF
A13V
12
15
BLUEON/OFF
A13V
18
A13V
GND
PWM8
GND
21
PWM5
PWM6
24
PWM3
27
GND
ANA_DIM
PWM1
30
CNL801
3
1+
4
8
7
2+
11
3+
12
15
4+
16
CNM803
CNL801
5+
6+
7+
8+
Fuse
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