Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

[moateez]

hello friends
Ineed schematic for this power
My TV is just red led with 3.3v and 5 v on standby
***no 24 v and no 12v
Big capasitor is 390 v big IC number on power is IC 807 his referance is KA3525A
Please help

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Please help

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Iam still reserching for the problem

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Friends please help

[R_J]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

5 seconds on Google I located the schematic. Check if you have ST_BY on PL803 pin 6, This is the power supply ON command from the main board, 1.7 volts = standby, 0 volts = power supply on

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

5 seconds on Google I located the schematic. Check if you have ST_BY on PL803 pin 6, This is the power supply ON command from the main board, 1.7 volts = standby, 0 volts = power supply on

pin number 6 from PL803 is 0 Volt sir

please help me ihave 3 days iwith this tv

[R_J]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Check the voltage on ic807, pin #15, You should have about +12 volts.

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Check the voltage on ic807, pin #15, You should have about +12 volts.

Yes sir in pin 15 from IC 807 ihave 13v now what i should do??? Please. Iam waiting for you sir

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Sir when i make short in Pl811 (sw2)
Big capasitor is 327 v and pin 15 from IC 807 is 0v

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

i will replace Ic807 and see Ka3525 what you say about it

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

SG3525 or SG2525 and i will by TNY266 the switcher

[R_J]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

If you still have 3.3v & 5v standby, tny266 will be ok.

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

If you still have 3.3v & 5v standby, tny266 will be ok.

yes sir i have it

then the problem is in ic807?

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

i have replace Ic807 and the same Probleme

please follow me

[R_J]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

What is the voltage on C826?
Did you check the fet's Q813 & 814?
Do you get any voltage at all on secondary capacitors like C863, C852, Cc806 Etc.

If you can, post good quality (in focus) pictures of the power supply board that would help

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

What is the voltage on C826?
Did you check the fet's Q813 & 814?
Do you get any voltage at all on secondary capacitors like C863, C852, Cc806 Etc.

If you can, post good quality (in focus) pictures of the power supply board that would help

Sir all capaitors are 0V
Q813 just 390 in pin 02 . 1 and 3 =0v
Q814 0 v

like picteur

[R_J]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

There are two blue square capacitors between the heatsink and transformer, check if they are bulged, they might be open. The sides should be flat and smooth, I suspect one is bad
They should be 15nF 650v (replace them with 15nF 1000V)
They are C877 and C878 on the schematic
This schematic might be closer

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

Yes sir i see themi have olredy test ghrme like testing daiode they give 570ohm in side i when i flip pins of multimiter they give 0 i think is good but i will replace thel and tell you

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

I cant find in my lab tomorow i will by 2 and see
Ihave change the place of c877 to c878 and c878 to c877 but same probleme

[moateez]

Re: Probleme. With powder 17PW20 v2 in TV Hitachi L32H01EA

ihave replace the 2 capasitors but same probleme