Vestel 17PW16-2 Fault Dead

[A-BT]

As suggested above, The p/supply has issues...
The fault 2 begin with was a completely dead set, but the Fuse is intacked, and there is voltage on the primary side...
I have changed quite a few parts (c877 c878 c817 c892 c801 c901 & Q809. Ive also looked for dry joints, or cracks in the board, just 2 be thorough.. I HAVE Found thou, that IF you disconnect PL803 from the p/s, then the Backlights work?!!!
Can anyone shed any light on the matter?
Regards in advance, A~BT

[A-BT]

Re: Vestel 17PW16-2 Fault Dead

Update--- Ive managed 2 get a hold of a schematic diagram, and its the 5v s/by on pl815 that is missing.!!
Fingers crossed when I jump the voltage, the set will come on... 1

[A-BT]

Re: Vestel 17PW16-2 Fault Dead

Nope...If anyone has ANY ideas, some help would be much appreciated..
Regards, A~BT

[tom66]

Re: Vestel 17PW16-2 Fault Dead

3V3 standby present?
If so could be bad 78L05 small IC regulates ~12V stby to 5V.

[A-BT]

Re: Vestel 17PW16-2 Fault Dead

Thanks for responding m8... Yes the 3.3V standby voltage is there on Pl815....
I didnt have any voltages on the secondary side, until i replaced a few parts that I got in a kit.. Now Im getting most of them, and the Backlight will come on, when i Disconnect PL803..!!
Regards, A~BT

[tom66]

Re: Vestel 17PW16-2 Fault Dead

If so, check 78L05 for 5V STBY. refer to schematic if unsure, there is one under "OEM" on my website.

[A-BT]

Re: Vestel 17PW16-2 Fault Dead

Thank you for the response m8...
I bought a PSU reliability repair kit, which included !C829 the 78905 reg, and It also provided Q809 (BC337), along with a few other components..
The board that I have Doesn't have the 7805 reg fitted to it, so the transistor BC337 is the 5v reg.
Im getting some voltages on the secondary side of the transformer now, but weirdly, there isn't and hasn't been any standby LED 'Action'!!
But when I disconnect the plug I mentioned above, Im getting power to the backlights...
I contacted the manufacturer of the PSU kit, and he confirmed that their reliability kit is made for 3 different Vestel boards, so hence the left over 78905 regulator..
Im going to start at the very beginning, and see if I have overlooked something, or created any man-made faults.!
thank you again for your response,
Regards, A~BT

[matyka]

Re: Vestel 17PW16-2 Fault Dead

Hello,I have the same power supply 17pw16-2 and I had main fuse blown ,after replacing many components I finally found the fault ,it was the bridge rectifier KBL10.
Could anybody help found a replacement please for KBL10.
Could I use Gbu4m 4A 1000V ?
Thank you.

[budm]

Re: Vestel 17PW16-2 Fault Dead

KBL10 is 4A 1000V rating so what ever you use it should match the spec and lead spacing so it will fit into the board.
https://cdn.badcaps-static.com/pdfs/...18b0926546.pdf

[matyka]

Re: Vestel 17PW16-2 Fault Dead

Thank you for the reply Budm ,I replaced with Gbu4m 4A 1000V and power board working great.