Teardown pictures of LCD and Plasma TVs - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: October 19, 2012, 11:52:48 pm
content: Thought these might be interesting. These are a few pics of some of the LCD/plasma TV's I've fixed as a hobby (I just sell them on or keep them after fixing), 35 and counting so far (unfortunately I don't have pics of some of them.) Hopefully 37 by the end of this week - two more coming to me shortly.Some of these are on my posts on badcaps.net but there's probably more appreciation for electronics design here, along with troubleshooting board level faults. I've included a short description of the fault with each.Atec AV420W: LCD. Dead - Shorted bridge rectifier, bad standby controller (due to bridge), and bad 400V standby cap (due to bridge)http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Atec%20AV420W/Bush LT24M3: LCD. Intermittently getting stuck in standby - Failing LDO (3.3V outputting 0.6V to 2V). PSU was also re-capped with Rubycon and Panasonic capacitors for longevity.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Bush%20LT24M3/Hitachi 42PD4200: Plasma. Dead - Bad 10 ohm inrush limiting resistor. One resistor had been replaced previously. Also had several other faults, including a cold joint on the plasma X driver, a blown fuse on the Z-sustain and sparklies (required firmware update - LG crap plasma panel.)http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Hitachi%2042PD4200/LG 42PC1D: Plasma. Inrush relay clicking, briefly powering up - Multiple bad Samwha caps and bad AC detect circuit (bypassed - no bad effects other than audible click on power off.) Had sparklies too - nightmare to rid it of them.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/LG%2042PC1D/NEC PX-50XR5G: Plasma. Powered up for 10 seconds then shut down. Bad audio amplifier telling TV to turn off, fixed by removing amplifier.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/NEC%20PX-50XR5G/Panasonic TX-P50G10B: Plasma. 6 blinks on LED. Fault never rectified, accidentally broke panel while working on set.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Panasonic%20TX-P50G10B/Philips 32PF4320: LCD. Dead - Bad standby controller and several burnt resistors. PSU replaced (only £12.)http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Philips%2032PF4320/Pioneer PDP-502MXE: Plasma. Stuck in standby - Bad inrush resistor due to shorted MOSFET. Once fixed, found out it also had bad plasma panel - 2" thick bar like Dave's plasma.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Pioneer%20PDP-502MXE/Samsung LE40A656: LCD. Stuck in standby. Bad capacitors, pretty typical for Samsung.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Samsung%20LE40A656/Samsung LE40R76: LCD. Faint vertical lines only on LCD, no picture. Bad 2.5V regulator on T-con board.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Samsung%20LE40R76/Samsung PS42B450: Plasma. Stuck in standby, clicking. Bad (shorted) X-main - shorted IGBT. Replaced board (only £15.)http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Samsung%20PS42B450/Sharp LC-32SD1E: LCD. Green shading on dark scenes. Corrupted EEPROM - reset and it worked. Easiest fix ever. Added note to chassis for future engineers.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Sharp%20LC-32SD1E/Thomson Wysius 42WM02L: Plasma. Fuzzy/indistinct picture. Bad capacitors and bad logic buffer channel causing 6th bit of green channel to be always low.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Thomson%20Wysius%2042WM02L/Toshiba 32WLT66S: LCD. Dead. Bad buck converter for image/HDMI processor. Replaced with LM317T on protoboard.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Toshiba%2032WLT66S/Toshiba 42WLT66: LCD. Shading on panel. Panel failure but mitigated by reducing brightness and loosening case pressure.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Toshiba%2042WLT66/Vestel 17MB24-2: LCD. Numerous failures with this and other Vestel chassis. Cheap chassis (or similar) found in Hitachi and supermarket TVs and even some budget Toshiba, Sharp and JVC TVs. Generally very poor construction.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Vestel%2017MB24-2/Xerox 17 inch monitor: LCD. Stuck in standby or indistinct/faded white screen. Numerous bad caps.http://www.tgohome.com/Teardown%20Pics/LCD%20and%20Plasma%20TVs/Xerox%2017%20inch/

author: amyk
author_rank: Super Contributor
timestamp: October 20, 2012, 05:50:02 am
content: 35? How long have you been doing this for?I think the consumer crap now doesn't last more than ~5 years without service, whereas I have a few CRT sets (and scope) that are still good after 20+ years.

author: tom66
author_rank: Super Contributor
timestamp: October 20, 2012, 11:34:52 am
content: Quote from: amyk on October 20, 2012, 05:50:02 amDone it for about a year and a half now. Surprising the amount of stuff you can pick up that people throw out.

author: saturation
author_rank: Super Contributor
timestamp: October 20, 2012, 03:34:33 pm
content: Amazing, you're a regular 'TV' repairman at this rate. How do so many get funneled to you, it must be going by word of mouth from owners, or you have a really good dumpster somewhere. I haven't seen a single TV in a dumpster, but it maybe because e-waste has to sent to a processing center today and it can't be just dumped anywhere anymore. Interesting to see the Philips made in Slovakia, clearly, not everything is made in China.

author: tom66
author_rank: Super Contributor
timestamp: October 20, 2012, 04:39:30 pm
content: Quote from: saturation on October 20, 2012, 03:34:33 pmI post ads on free ad websites paying around £20 to £50 for them each. I fix about 90% successfully and sell them for £100 - £300, usually with just £5 of parts (sometimes I have to buy a remote and/or a stand if I don't get them with the TV so add £30 or for those.) Good income for me as a student, though I don't do it so much anymore because I don't have easy access to a car in uni. I usually have to collect them around 30 miles away from me, and I've only picked up 3 from the local tip and one from outside someone's house (neighbour; saw it walking past, they told me they just wanted it gone, was an easy fix for a 42" full HD set, plus they gave me the remote and a power cord... I sold it very cheaply to my friend who needed a TV.)The earlier versions of that Philips board were made in Slovakia, but the newer replacement I got was made in China.Most Samsungs are made in Slovakia, most genuine Toshiba sets are Polish made (used to be UK made), and the NEC was UK assembled with Japanese plasma panel and power supply. I think the Sharp was made in Taiwan. The Pioneer was Japanese made. I've only ever seen one TV that definitely came from China.I don't like the TV repair industry myself: overcharging for parts and labour, and trade secrets (especially making it hard to find service manuals), are probably the #1 reasons increasing numbers of TVs are thrown out. I understand you need to make a living, but I still can't help but think the prices are extortionate.

author: poorchava
author_rank: Super Contributor
timestamp: October 22, 2012, 10:15:59 am
content: QuoteTrue that. The factory is located around 20km from the outskirts of my city (I guess like 40km from the center). It's a funny place where the local government set up a special industrial zone. It's commonly referred to as "LG Street", because LG was first there, but there is also Toshiba, NEC and like 10 other companies with chinese sounding names I've never heard about.Sad thing: recently i read in some financial/business magazine that cost of hiring an employee is in Poland/Czech Republic/Slovakia/Slovenia/Estony/Lativia/Ukraine etc is only 15-20% higher than in China. That means more and more companies invest big bucks because they save alot on shipping and even though labour is slightly more expensive, they get that back on cheaper logistics. Plus we are in the EU, so far less customs paperwork in most cases.