Sony KDL-32S3000 LCD 2 Blinks Error code

[SurrealMustard]

I'm working on this Sony Bravia LCD and was wondering if anybody has any ideas as to how to figure out what the problem is. What happens is that when the power button is pressed, I hear the relay click and the power light comes on, but nothing happens for a few seconds. After that, the power light comes off and the "STANDBY" light blinks twice repeatedly. No backlight, no video at any time in the process.

According to the service guide, two blinks indicates a "balancer error." Now, I'm not that familiar with Sony products, but I am familiar enough to know that, like Apple, they have their own proprietary names for things, so I guess the question is, what is the "balancer," first of all, and how can I diagnose it?

In the only other thread that BadCaps has published on the issue, it was suggested by one person that this is likely to be a GH1 board. If "GH1" equals G1H, then that looks to be the power supply. Is the power supply the "balancer?"

[dskall]

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

Balancer may have to do with inverter/backlights

[budm]

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

No balancer board in this model, only the inverter board.
Do you notice that the backlights even come on for seconds?
Can we see where you get that error code from that indicated it is Balancer error?

[SurrealMustard]

No backlights, even for a moment

No balancer board in this model, only the inverter board.
Do you notice that the backlights even come on for seconds?
Can we see where you get that error code from that indicated it is Balancer error?

I tested it in a dark room and the backlights don't come on at all whatsoever as far as I can tell. The error code was decoded using page seven of the service guide (attached).

[SurrealMustard]

Intersection of Troubleshooting

So, given the symptoms, is it a reasonable assumption that we're looking at either a bad power supply or a bad inverter? If so, what would be the best way to narrow it down to find out exactly?

[dick_barton]

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

What voltages do you have at CN6402 Pins 1 -> 5

[SurrealMustard]

CN6402 is MIA

What voltages do you have at CN6402 Pins 1 -> 5

I don't know. I don't see a CN6402 connector anywhere in this thing. Some of the connectors on the power board do tell what they're supposed to be carrying, but none of them contain the BAL_ERR, INV_ERR, BACKLIGHT, or DIMMER_PWM that are supposed to be on CN6402. None of the connectors on the power supply are registering much of anything at all, strangely enough.

[dick_barton]

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

I would lift the cover from the inverter board and check that none of the fuses have blown.

[dick_barton]

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

The power supply schematic attached.

[SurrealMustard]

Inverter Fuzes test good

I would lift the cover from the inverter board and check that none of the fuses have blown.

I tested all three of the fuses that I could find and they all checked out.

The power supply schematic attached.

Is that the same one as in the service guide?

[vinceroger69]

Re: Intersection of Troubleshooting

So, given the symptoms, is it a reasonable assumption that we're looking at either a bad power supply or a bad inverter? If so, what would be the best way to narrow it down to find out exactly?

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

[Andrew F. Ali]

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

Disconnect the cable from the PSU to the Inverter bd and power-up the TV. If it is the Inverter Bd that was causing the problem then the 24V should remain on and the ' 2-blink' should stop also, confirming the Inverter Bd as faulty.

[SurrealMustard]

Troubleshooting differential

Balancer may have to do with inverter/backlights

Under the "Meaning/Related" fault for a balancer error, it says "Balancer error/PANEL_DET (PMUX6.7) to low level, between 2.48V and 0.83V." I searched the rest of the manual for PANEL_DET, but didn't find much except for some tiny references to it on the schematics. What exactly does PANEL_DET (defined as "panel detect" in some literature online) do?

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

There's writing on the topside actually. Only for the connectors on the power supply though.

Disconnect the cable from the PSU to the Inverter bd and power-up the TV. If it is the Inverter Bd that was causing the problem then the 24V should remain on and the ' 2-blink' should stop also, confirming the Inverter Bd as faulty.

Same two blinks when powering up with the inverter power connection unplugged.

[vinceroger69]

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

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

[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.

[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.

[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?

[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%

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

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