fps212 3f01 diagnostic check
DESCRIPTION
FPS212-3F01- Diagnostic checkTRANSCRIPT
-
7/15/2019 FPS212 3F01 Diagnostic Check
1/2
230V AC
Front LED
230V AC
PSU
5Volt Always on PSU
Backlight Inverter
Main Control PWB
5V=on, 0V=off
Infra Red
Receiver
12V + 24V switched Power
supply
12+24V enable
B'light enable
Over Current
Shut down
12V Switched
5,6,7+8 CNS2 10 9
5V
Micro
Periferal supplies,
Tuner, TFT driver etc...
TFT display
24V Switched
CNS1
7,8,9
10
5+6
11
12
CNS1,2 pins 1,2,3
& 4 = Ground
-
7/15/2019 FPS212 3F01 Diagnostic Check
2/2
TV Dead / No Backlight Illumination
Front LED working or notSuspect PSU diagnosis
This should only be used as a guide to faultfinding. I do not accept liability for any inaccuracies. This guide is produced
solely by loudi out of desperation as info on this PCB is non existent - I am just sharing my own findings/ research :@)
Check Voltage
on CNS1 pin 7-9
4.5>5V?
Yes
NO
faulty PSU
Suspect IC2 Q4BD1 C1 etc..
Check Voltage
on CNS1 pin 10
With TV
switched on
3>5V?
Yes
NO
Main Control PCB Faulty
(Try Hard Reset of Micro)
Check Voltage
on CNS1 pin 5
With TV
switched on
12V? NO
NO
Check Voltage
on CNS2 pin 5
With TV
switched on
Yes
24V?Yes
Check Voltage
on CNS2 pin 10
With TV
switched on
5V? Yes
NO
faulty backlight inverter
Check Fuse F1 (4A250v)
OK Blown
Check Voltage
on CNS1 pin 12
With TV
switched on
0V or
(pulsing)
Pulsing
0V
faulty PSU
Suspect CS21,22,28
R65 Q7 R58 ZD4
faulty PSU
Suspect CRS2
CS19,24,25
faulty PSU
Suspect IC1 check
CS20,23,27
Over
Current
protection