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Equipment Repairs => LCD TV forum => Topic started by: sparkman001 on June 30, 2012,08:35:20

Title: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sparkman001 on June 30, 2012,08:35:20

Anyone had one of these in recently? Its not long out of guarantee, its stuck in standby. Flashing standby indicator. Any stock faults before I delve in there?
Thanks
Bill

Title: Re: Toshiba LCD 32KV500B
Post by: sparkman001 on July 01, 2012,08:51:42

Just had a quick look at it now, its the Vestel 17pw26-4, usual culprits check ok, but I'm a bit suspicious of Q828, can't find much about it, can anyone identify it ? No bulging caps and no sign of blow up.
Bill

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sabre504 on July 01, 2012,13:25:44

Hi looking at pdf its a 10L60CFP

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sparkman001 on July 02, 2012,08:45:15

I've substituted the PSU board with a known good vestel 17pw26-3 from another 32" set, the only difference is the -3 version has no socket for the switch. The set came on fine, so its definitely the PSU at fault.
The usual uf5404 fast recovery diode checks ok, but I need to substitute it with a new one, as it may be leaky. I've also replaced the 33uf 63v electrolytic c801, to no avail.
Anyone any ideas?
Bill

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sparkman001 on July 02, 2012,11:04:08

UF5404 replaced no change, standby light flashing continuously. There is no sign of anything obvious.
Bill

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: jordan on July 02, 2012,13:18:56

-SMD-C925(1uF or 10uF) between pins 1 and 4 of FAN7711
-C851(1000uF/16V)
-C818(2700uF/16V)
-IC806(FSDL321)
-IC801(TCET110G)
-R1013(4,7Kr)
-R1036(OR)
-D881,882,883,893
-IC830(FAN7711N)
 

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sparkman001 on July 02, 2012,14:41:01

Thank you Jordan, I will check those components .
Regards
Bill

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: jordan on July 03, 2012,02:58:11

Do you change this two capacitors 12nF/630V (C-878 and C-xxx)

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sparkman001 on July 03, 2012,03:08:16

I haven't changed those 2 x 12nf capacitors yet, they are next on my list. I will change those today and post back.
Thanks Jordan
Bill

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: sparkman001 on July 05, 2012,13:30:51

I changed C878 its a 22n poly cap in this set, and used a 1kv replacement, but the fault remained. I checked all the electrolytics with my esr meter and they were all low esr and no signs of distress. So then decided to replace the ballast control i/c FAN7711, this cured the fault fortunately.
Set is now working fine after a long soak test and is now fit for service again.
Thank you Jordan for your assistance, much appreciated.
Bill

Title: Re: Toshiba LCD 32KV500 / VESTEL 17PW26-4
Post by: jordan on July 05, 2012,13:45:23

 :sign0098: :33: