Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
RCA Projection TV: P52152ST
I've had this RCA 52" Projection tv P52152ST for about 10 years now.
Its served me well and its not used that often, sparsley if at all but sometimes more than others. For the last week its been making popping and squealing noises and taking longer than usual to warm up. Today it turns on for about 30 secs with all the popping, after that it goes *click* *click* *click* and turns off. Sounds like the Overload Protection Circuit kicked in or something. I'm a computer technician and i know next to nothing about tv's but i looked around the circuit board and there was NOTHING burnt, all fuses in place etc... I can distinctly hear that squealing from the back. What does it sound like? Big Job? |
#2
|
|||
|
|||
RCA Projection TV: P52152ST
Could be several things, most of them expensive to repair/replace.
1)HV splitter was arcing (the popping), and continuing to use the set has now blown the horizontal output, causing the power supply to go into overload shutdown (the squealing) 2) One or more (probably more) of the CRT coolant chambers is leaking, and the fluid has contaminated the anode caps on the CRT(s), causing the arcing, which has led to shorted horizontal output. 3) IHVT was arcing due to failed insulation, and continued running of the set has caused shorted horizontal output. Any of these problems will require experienced tech to repair. |
#3
|
|||
|
|||
RCA Projection TV: P52152ST
|
#4
|
|||
|
|||
RCA Projection TV: P52152ST
Check to see if this set has a CTC169 Chassis (label on rear of set will
indicate either PTK169 or CTC169 on tag on chassis itself; if it is, this set does not have a "high voltage board"; get more info about exactly what is wrong with set, or find another repair service. $450 is on the high end fro repairs on this set, which has a number of known and correctable faults, none of which (with the possible exception of multiple leaking CRT's with associated H.V. and board contamination) should cost that much to repair. Caveat Emptor!!! |
#7
|
|||
|
|||
RCA Projection TV: P52152ST
(John) wrote in message . com...
(Jason D.) wrote in message ... On 8 May 2004 18:44:55 -0700, (John) wrote: (BWL) wrote in message ... Could be several things, most of them expensive to repair/replace. 1)HV splitter was arcing (the popping), and continuing to use the set has now blown the horizontal output, causing the power supply to go into overload shutdown (the squealing) 2) One or more (probably more) of the CRT coolant chambers is leaking, and the fluid has contaminated the anode caps on the CRT(s), causing the arcing, which has led to shorted horizontal output. 3) IHVT was arcing due to failed insulation, and continued running of the set has caused shorted horizontal output. Any of these problems will require experienced tech to repair. I was told today that it was a High Voltage board and it would cost 450 dollars to repair. Is this about right or am I being ripped? A touch high and statment from that shop makes me wonder. High voltage is HV for short btw. There is no such as high voltage board, that's singular purpose. That chassis has combined items (micro this is "tiny computer on a chip for user control and tv operation), video audio etc. Also on same board, vertical and horizontal deflection circuits, horizontal also is part of that generates HV output). This chassis is a older but very nice and weird chassis: CTC169. Looks like shop may not be famillar with it since this is been not in production for nearly 10 years but parts are still available from RCA. *snip* Well, I called the shop and being a former television repair receptionist myself they divulged that "The Technicians are know what they do" and "The entire High Voltage board will not be replace that much espensive" . So they are salvaging the board and still charging me 435 dollars. What would be a fair price. What could i do? Can someone cite me that part from a distributor? Much Appreciated. -Andrew www.oceansidecc.com |
#8
|
|||
|
|||
RCA Projection TV: P52152ST
Hi John,
are still available from RCA. *snip* Well, I called the shop and being a former television repair receptionist myself they divulged that "The Technicians are know what they do" and "The entire High Voltage board will not be replace that much espensive" . So they are salvaging the board and still charging me 435 dollars. What would be a fair price. What could i do? Can someone cite me that part from a distributor? Okay, take the chassis back from that shop, I'm liking this sound of their comments less. Have you done any electronic hobbies like putting a electronic item together from kit or fixing and soldering boards, even done electrical repairs in your car lately? Using digital meter to measure voltages, diodes and resistances? Changing parts is part of overall repair also adjusting to specific voltage is a necessary after changing four capacitors in power supply for this '169 chassis. Can show you what to do in this '169 providing you're confortable working on that kind of electronics. Changing the HV splitter block is doable be aware is somewhat fussy to do. I can take several photos and instructions. The parts total is about 120 to 140. Most expense is in that HV splitter block. Cheers, Wizard Much Appreciated. -Andrew www.oceansidecc.com |
#9
|
|||
|
|||
RCA Projection TV: P52152ST
(Jason D.) wrote in message ...
Hi John, are still available from RCA. *snip* Well, I called the shop and being a former television repair receptionist myself they divulged that "The Technicians are know what they do" and "The entire High Voltage board will not be replace that much espensive" . So they are salvaging the board and still charging me 435 dollars. What would be a fair price. What could i do? Can someone cite me that part from a distributor? Okay, take the chassis back from that shop, I'm liking this sound of their comments less. Have you done any electronic hobbies like putting a electronic item together from kit or fixing and soldering boards, even done electrical repairs in your car lately? Using digital meter to measure voltages, diodes and resistances? Changing parts is part of overall repair also adjusting to specific voltage is a necessary after changing four capacitors in power supply for this '169 chassis. Can show you what to do in this '169 providing you're confortable working on that kind of electronics. Changing the HV splitter block is doable be aware is somewhat fussy to do. I can take several photos and instructions. The parts total is about 120 to 140. Most expense is in that HV splitter block. Cheers, Wizard Much Appreciated. -Andrew www.oceansidecc.com The problem is...a common foe. They "started work already" and i would be responsible for applicable labor charges and the 55 dollar service call fee. I was more thinking like "Hey...this is the distributor, this is how much it costs and how much do you think you can charge for labor?" I could've done it too, I'm a computer technician and i've soldered things before. Too bad... Anyways, A Catalog Part # would be great, maybe even a link to a jpg file or a pdf file. Maybe you can recommend something else to say to them? **Awkward Situation** Another guy I called that I work RIGHT NEXT DOOR TO, was an old man and he didn't even have the part, he didn't even have a distributor... |
#10
|
|||
|
|||
RCA Projection TV: P52152ST
Did you tell them to fix it? If you were only waiting for an estimate, and
haven't already OK'd the repair, then you should only be out the Estimate fee... If that's the case, go get the set, pay the estimate fee, and take it somewhere else. |
#11
|
|||
|
|||
RCA Projection TV: P52152ST
(BWL) wrote in message ...
Did you tell them to fix it? If you were only waiting for an estimate, and haven't already OK'd the repair, then you should only be out the Estimate fee... If that's the case, go get the set, pay the estimate fee, and take it somewhere else. Yep, They're a good shop. It wasn't my choice, My wife already gave them the go ahead. I could've done better but what are ya gonna do? I got it to a good shop, there's this other one in my town the f*cks up EVERYTHING. I'm just glad she kept it away from them. Che Sara Sara. I really appreciate all of your help. You need any computer help just email me @ Thanks. |
#12
|
|||
|
|||
RCA Projection TV: P52152ST
On 13 May 2004 12:23:52 GMT, (John Del) wrote:
Subject: RCA Projection TV: P52152ST From: (John) Date: 5/13/04 12:02 PM Message-id: The problem is...a common foe. They "started work already" and i would be responsible for applicable labor charges and the 55 dollar service call fee. At this point, you're pretty much screwed. If you pay the charges accrued up till now, buying the parts and doing the work yourself will likely cost more than their estimate. The HV block must be carefully installed, as any contamination on the leads or internal gaskets, or if the lead tips don't fully seat in the bottom of the block, will lead to a short life of the new part. With recapping of the SMPS, checking the HV caps, completely cleaning the HV leads and gaskets, properly installing the leads (a feel thing as much as anything), and using an RCA original block, the repair will last virtually forever. We do these complete with PU\Del for under $350 US as described above. For what it's worth, I've seen these done for what your guy is charging, and doing a lousy job. If they do the work properly, at least the job should last. Good luck. Agreed, I have seen shoddy jobs on these HV blocks and didn't last long, THIS is fussy job, I got good at it. Many had missing gasket sleeves (!!) and twisted up wire tip (shoddy poke!). The newer HV blocks in those HDTV and burnt R14705, oh please!! Awful way to remove those wires. You have to be really physical to YANK the wires out and at same time taking care not to hit anything else on the way when wire suddenly let go. Grunts with effort...SNAP, sigh, grunts-SNAP then 3 more to go. Cheers, Wizard PS: missing sleeves can be replaced with short sections cut off from newer black RCA style long sleeved HV suction cups. Fits fine and does seal because it has same effort when pushing those wires in. Replacement sleeves is available from RCA but it is about 5 dollars EACH, not a packet of few! Use silicone dielectric grease makes installation easier & reliable. RCA should use twist & lock stuff. :-) John Del Wolcott, CT |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
PANASONIC PT52DL52 PROJECTION DLP TV LAMP NEW | Electronics Repair | |||
Non-huge parliament or projection hinge: exists? | UK diy | |||
Hitachi Projection Tube Part Description Confusion | Electronics Repair | |||
Toshiba Projection TV Help. | Electronics Repair | |||
Pioneer 60" Projection Tv | Electronics Repair |