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Search: Posts Made By: Chungalin
Forum: Troubleshooting TVs and Video Sources 02-16-2021, 01:12 PM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

When you repair a TV that is not yours, that fine detail about what happened days or minutes before the final failure, or in what circumstances it eventually failed (while on, when turning on, etc.)...
Forum: Troubleshooting TVs and Video Sources 02-16-2021, 09:53 AM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

My Service log is identical to yours (except the very first 32bit hex number, that looks like a boot cycle counter). This determinism lead me to rule out broken CPU solder points, because something...
Forum: Troubleshooting TVs and Video Sources 02-16-2021, 04:50 AM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

But, what caused the first improvement in Maalobs TV? CPU reflow or NAND replacement? Since he did both things at the same time, it wasn’t clear to me which one was the root cause. I admit that I’ve...
Forum: Troubleshooting TVs and Video Sources 02-14-2021, 07:53 PM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

Error 2 / 53.

Thanks Maalobs. I have an XGecu TL866II Plus that can read/write these NANDs, but I don’t have a TSOP-48 adapter, so I’ve prefered to order an already programmed NAND for this...
Forum: Troubleshooting TVs and Video Sources 02-11-2021, 08:17 PM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

Well, I just wanted to check that I get exactly the same log outputs in both ports than Maalobs. Also, I wanted to make sure that my mods on the standard serial USB adapter were working fine.

I...
Forum: Troubleshooting TVs and Video Sources 02-10-2021, 07:27 AM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

Thanks. I tried other lower speeds without luck, but not this one!

I use a USB serial adapter with FTDI FT232BM IC and a Sipex SP213ECA IC for standard serial voltages. I disabled the second IC...
Forum: Troubleshooting TVs and Video Sources 02-05-2021, 10:31 AM
Replies: 131
Views: 25,198
Posted By Chungalin
Re: Philips 60PFL8708S/12 - QFU1.2E LA - Error code 53

Is there any difference between those two serial ports? While I can get clear communication from TXD-SERVICE (with expected parameters of 115200-8bit-1stop-no parity-no flow control), I just get...
Forum: General Electronics Technical Discussion 06-15-2020, 05:40 PM
Replies: 10
Views: 3,207
Posted By Chungalin
Forum: Troubleshooting TVs and Video Sources 10-29-2019, 12:30 PM
Replies: 37
Views: 33,123
Posted By Chungalin
Re: Samsung BN44-00505A(PD23A0Q) psu, smd transistor types

STR-W6052S is 60W, while STR-W6053S is 90W, this is why itís not safe to replace 6053 with a 6052. But you can replace 6052 with a 6053.
Forum: General Computer & Tech Discussion 07-21-2019, 04:44 AM
Replies: 6
Views: 1,821
Posted By Chungalin
Re: Repairing a DDR3 4GB DIMM with bad SPD EEPROM

But, you should expect that same maker, same model and same part number, imply same chips or, at least, same chip specs. So itís not an illusion that the module is working right now with a cloned SPD...
Forum: General Computer & Tech Discussion 07-20-2019, 07:37 PM
Replies: 6
Views: 1,821
Posted By Chungalin
Repairing a DDR3 4GB DIMM with bad SPD EEPROM

This is just for fun. Please donít tell me that a 4GB DDR3 is not worth this work.

I received a beeping PC that had a RAM issue: a single Kingston KVR1333D3N9/4G DIMM (part number...
Forum: Troubleshooting Audio Equipment 07-05-2019, 11:39 AM
Replies: 73
Views: 17,017
Posted By Chungalin
Re: Mackie CR4 monitors

Why not a more common 1N4148 ?

To me, that blacked PCB itís way more worrying. Iíd say itís carbonized around the diode and will be conductive. Youíll need to scrape away any carbonized parts of...
Forum: Troubleshooting Computer Displays 11-07-2018, 07:39 AM
Replies: 9
Views: 3,594
Posted By Chungalin
Re: HP Envy 27 (C8K32AA) IPS LED monitor, flash dump needed

I bought a XGecu TL866II plus programmer and read the memory in cold state. I read it several times to be sure thereíre no errors.

I pulled a similar Winbond W25X40ALS15 (marking 25X40ALS15, not...
Forum: Troubleshooting Computer Displays 10-26-2018, 09:15 AM
Replies: 9
Views: 3,594
Posted By Chungalin
Re: HP Envy 27 (C8K32AA) IPS LED monitor, flash dump needed

Umm, I see that the link I provided has been censored by a moderator. I wonder why, even after re-reading forum rules. As far as I know, that site is not a paid one. I just said it’s in russian...
Forum: Troubleshooting Audio Equipment 10-23-2018, 09:21 AM
Replies: 9
Views: 1,991
Posted By Chungalin
Re: Sony CD player CDP-397 repair, No Disc, fixed

Addendum to original CDP-397 repair: it wasn’t so easy, like almost all repairs. That’s why this, as a job, sucks.

The CD returned two weeks later with even weirder/crazy behavior. When it was...
Forum: Troubleshooting Audio Equipment 10-17-2018, 04:57 AM
Replies: 9
Views: 1,991
Posted By Chungalin
Re: Sony CD player CDP-397 repair, No Disc, fixed

KSS-271A ? Looks like you are talking about a ES series from Sony ("flagship" series). Never repaired one of these. ES series means quality but also more complexity, sometimes unnecessary except for...
Forum: Troubleshooting Computer Displays 10-16-2018, 02:19 PM
Replies: 32
Views: 5,858
Posted By Chungalin
Re: Auria EQ276W - Looking for Replacement LED Driver

I don’t see any blown capacitor in either case. Looks to me that glue that keeps capacitors in place has played a bad joke to the circuit, as it has been pointed many times in this forum.
Forum: Troubleshooting Computer Displays 10-16-2018, 12:02 PM
Replies: 9
Views: 3,594
Posted By Chungalin
HP Envy 27 (C8K32AA) IPS LED monitor, flash dump needed

I’m trying to repair a HP Envy 27 (C8K32AA) 27" IPS LED full HD monitor. It works fine when cold, but a minute later it freezes. After that it becomes uncontrollable or plain dead.

I found this...
Forum: Troubleshooting TVs and Video Sources 10-09-2018, 11:04 AM
Replies: 9
Views: 1,197
Posted By Chungalin
Re: What glue for led covers?

I’ve used Cyanoacrylate (Superglue3, etc.) for this purpose. Some complain that its vapors can bleach the lens or LED. The trick here is to use only the exact amout of glue, just a tiny drop in the 3...
Forum: BIOS & Schematic Requests! 10-09-2018, 05:41 AM
Replies: 5
Views: 1,801
Posted By Chungalin
Re: Gigabyte GA-B75-D3V schematic needed

Thanks Piernov.

Before my previous message I already tried the 3.3V injection from my bench PSU. The only one that got anomalously hot was DVI level shifter IC (ASM1442). I removed it but still no...
Forum: BIOS & Schematic Requests! 10-08-2018, 06:13 AM
Replies: 5
Views: 1,801
Posted By Chungalin
Re: Gigabyte GA-B75-D3V schematic needed

Merci, Piernov.

I’m gonna dismiss this repair because I don’t know how it died. It could be due to lightning surge, and that’s a hell to repair. I though that audio CODEC was the only bad part,...
Forum: BIOS & Schematic Requests! 10-08-2018, 03:56 AM
Replies: 5
Views: 1,801
Posted By Chungalin
Gigabyte GA-B75-D3V schematic needed

Gigabyte GA-B75-D3V desktop motherboard. Iíve found schematic in vietnamese forums but all ask payment for download. BTW, why all laptop and motherboard repair forums are in Vietnam?

I found audio...
Forum: Troubleshooting Audio Equipment 10-02-2018, 07:10 AM
Replies: 9
Views: 1,991
Posted By Chungalin
Re: Sony CD player CDP-397 repair, No Disc, fixed

In this context, FFC is Flexible Flat Cable, but it can also mean Flexible Foil Circuit (a thin transparent foil where a circuit is printed and SMD components can be soldered).

These KSS-240A...
Forum: Troubleshooting TVs and Video Sources 10-02-2018, 03:34 AM
Replies: 3
Views: 954
Posted By Chungalin
Re: Has anyone tried this british TV spares shop?

I asked them to post an actual picture of a PSU, instead of a picture taken from ebay or other sites. No reply.
Forum: Troubleshooting Audio Equipment 10-01-2018, 03:29 AM
Replies: 9
Views: 1,991
Posted By Chungalin
Re: Sony CD player CDP-397 repair, No Disc, fixed

I’ve repaired more than 150 Sony CD players from the 90’s and they’re always repairable. KSS-240A insides can be cleaned with care, never require replacement. Main failures are: dirtiness, loading...
Showing results 1 to 25 of 310

 
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