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.

 
 
LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #1   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 28
Default Philips magnovox projection TV dead now

The guy forgot to hand me the the paper with the model number written down,
so im not sure what it is, but i got the sweep/power module here.

it was a 1997 model thats 53 or 54 inch.

The model number of the sweep board is APD008B002 GR7D LARGE SIGNAL.

Anyway, back to the problem.

everything was working just fine, but the glycol was shot. So everything was
going smooth, cleaned the CRTs and changed the fluid.

I had to fight to get the HV wires back in the splitter which is mounted on
the board.

I went to power it up, everything fired up at first, then the HV charged up
the CRTs. at that second i heard a couple of HV arcs from the splitter
vicinity and it powered down. I had this happen lots of times when the wires
arnt seated all the way.

Thats when i relized one of the HV wires curled up and didnt go in the hole.

so i fixed it, but now its too late. For some strange reason, the set is now
dead. no power, no startup, nothing. ARGH. the only set i had do that too.

I checked all the usuals, the fuses, all the inline circuit fuses, I check
the HOT and the HV output transistors, those are fine. All the diodes, i
checked the chopper transistor. Everything. I cant find anything shorted or
bad. checked all resistors. hmmmmm....

the chopper just dont want to start up. I removed the HOT out of circuit, no
difference. the system draws power when plugged in, but the power supply no
longer "chirps" when plugged in like it used to. I tested for the 5 and 15v
standby, they are present. but no other voltages are. (chopper not running).

so now, im screwed, and dont know what went wrong in the circuit.

Any ideas?


 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Philips 14PV200 - Dead davros1983 Electronics Repair 1 November 9th 05 10:02 AM
ICs for Sale - Specials, obsolete and Memory The Photographer Electronics Repair 0 June 3rd 04 11:40 PM
ICs for Sale - Specials, obsolete and Memory Kristy Electronics Repair 2 April 14th 04 04:24 AM
Dead Tumble Drier (Philips AWB 681) Chris O UK diy 7 February 24th 04 09:39 AM
projection tv gone dead Louie Electronics Repair 7 July 22nd 03 04:15 AM


All times are GMT +1. The time now is 06:57 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"