Sony KDL-32S3000 LCD 2 Blinks Error code

[SurrealMustard]

Sony: 2 – Me: 0

Well, it looks like yet another Sony has escaped my repair efforts. The happy ending is that I was able to get a little bit of cash for it as-is and the seller issued a refund for the (presumably bad) power supply board. Now, it's someone else's problem!

[SurrealMustard]

Could it be a bad part?

REG 24V would be there for a brief moment upon power on before dropping off into the teens and slowly piddling away.

Given that, is it possible that I just got another bad power supply?

[SurrealMustard]

REG 24V regulated by the power supply?

Based on the schematic provided, the REG12V is generated by the transformer T6103, D6211,C6252.
The primary of T6103 is driven by the secondary winding of the transformer T6101 which generates the 24V, UNREG6V.
Transformer T6104 for the UNREG13V uses the same topology, so inspect those parts in the UNREG12V section.
You do have 24V, right?

REG 24V would be there for a brief moment upon power on before dropping off into the teens and slowly piddling away.

[budm]

Re: Sony KDL-32S3000 LCD 2 Blinks Error code

Based on the schematic provided, the REG12V is generated by the transformer T6103, D6211,C6252.
The primary of T6103 is driven by the secondary winding of the transformer T6101 which generates the 24V, UNREG6V.
Transformer T6104 for the UNREG13V uses the same topology, so inspect those parts in the UNREG12V section.
You do have 24V, right?

[SurrealMustard]

Analysis of the problem

It seems like the 12V should be coming from the power supply though. Given that, I don't understand how we'd be seeing the exact same problem on the replacement. Either something's up on the mainboard or the replacement power supply was afflicted by the same issue as the original. I'll get in contact with the eBay seller to see if we can find out any more information about its origins.

[vinceroger69]

Re: Sony KDL-32S3000 LCD 2 Blinks Error code

shematic

[SurrealMustard]

Part number

Well, next step will be looking at the service manual for that WAX3 chassis of that model to see how that 12V is generated.
And just to sure, what is the power supply board P/N for your TV?

The part number on the board is 1-474-052-12.

[budm]

Re: Sony KDL-32S3000 LCD 2 Blinks Error code

Well, next step will be looking at the service manual for that WAX3 chassis of that model to see how that 12V is generated.
And just to sure, what is the power supply board P/N for your TV?

[SurrealMustard]

Same voltages with original and replacement boards

Same result with the original and the replacement board?

Yes. Exact same .2-.3V on the UNREG 12V and immediate drop-off on the REG 24V using both the original and replacement board. The replacement is used, but allegedly "pulled from a working environment."

[budm]

Re: No REG 12V to be found

I don't see anyplace on the power supply to test for REG 12V, but UNREG 12V is reading next to nothing at all (tenths of a volt at most). REG 24V goes to full voltage when the set is first powered on, but quickly fizzles out and slowly drops to nothing.

Same result with the original and the replacement board?

[SurrealMustard]

No REG 12V to be found

Did you verify that you do have the REG 12V from the power supply board?

I don't see anyplace on the power supply to test for REG 12V, but UNREG 12V is reading next to nothing at all (tenths of a volt at most). REG 24V goes to full voltage when the set is first powered on, but quickly fizzles out and slowly drops to nothing.

[budm]

Re: Sony KDL-32S3000 LCD 2 Blinks Error code

Did you verify that you do have the REG 12V from the power supply board?

[SurrealMustard]

Replaced power board, no luck

Unfortunately, the problem somehow still persists even after replacing the power supply board. Any ideas? Did I maybe just get another bad power supply?

[SurrealMustard]

good call; proper diagnosis!

Your TV is WAX3 chassis, not SE1A chassis.


See training manual about 2-blink code page 22, 30.

Ah, now that's more like it. The manual I had must've been for the foreign version of this set that used the same model number.

As for this one, it looks like two blinks indicates a "REG 12V FAILURE" with the possible cause being listed as the power supply board. I guess I'll start there and see if I can track down a replacement.

Thanks again to you and everybody else who pitch in and help folks out on here. I'd be lost without this forum.

[Andrew F. Ali]

Re: Sony KDL-32S3000 LCD 2 Blinks Error code

Ignore my previous post as I just saw budm's post. Sorry.

[budm]

Re: Sony KDL-32S3000 LCD 2 Blinks Error code

Your TV is WAX3 chassis, not SE1A chassis.


See training manual about 2-blink code page 22, 30.

[Andrew F. Ali]

Re: Inverter Fuzes test good

Your power supply is marked as APS-229 G1H and I believe that it is the correct schematic for your power supply. Compare the schematic against your board to be certain.

All this happening while Main Bd disconnected+5c-. OK so this will make it easy. Self-test the PSU by
1. Disconnect on the Main Bd side the cables going to the%

[SurrealMustard]

hidden pinout

on the invertor board by the mainboard connector is there any writing?

As a matter of fact, there is a pinout on the back of the inverter near the connector. Would the "DET" on there possibly be related to the "PANEL_DET" cited by the service guide?

[dick_barton]

Re: Inverter Fuzes test good

Is that the same one as in the service guide?

Your power supply is marked as APS-229 G1H and I believe that it is the correct schematic for your power supply. Compare the schematic against your board to be certain.

[Andrew F. Ali]

Re: Intersection of Troubleshooting

could be the mainboard too not sending the voltages to the inverter board i wonder if you can force on the psu and check all voltages are correct is there any writing on the underside of the psu by the connectors to tell us what each pin does etc

Disconnect the cable on the PSU going to the Main Bd when forcing the PSU on. Also I noticed the Inverter working with 12Vdc and not 24Vdc.