Question about Philips 32PT6441/37 32" TV

4 Answers

Blown fuse 1.25amp Board pos. 1452

Set would not power up found blown fuse 1.25amp pos.1452.I replaced the fuse set still will not power up, but the fuse does not blow again. I do not have the service manual, any ideas what else may be in line with that fuse that could have blown.

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  • Bill Harold Jan 28, 2007

    A board mount fuse, not a main fuse - idiot.

  • Bill Harold Mar 13, 2007

    I was the one who said you pasted the test.I don't think it got posted properly.

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Check the bridge rectifiers -you need a shematic diagram in order to troubleshoot the problem

Posted on Mar 11, 2008

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You pasted the test. The coil is a horz. driver it is replaced with a kit from philips the part # 483531057673. You can buy this kit from MCM for about 12.00 bucks. you need the right tools you have to replace a surface mount transitor that comes in the kit.

Posted on Mar 12, 2007

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The 1,25 Quick Blow Fuse, is in series with a mains harmonic coil (looks like a small transformer on a separate board next to the main board, but with only two wires, running to the main power supply board, connector is next to this fuse). It just blew in our Philips 32PW8608... This should not be replaced with a 4 Amp Time Delay (Slow Blow) Fuse! The 4 A TD Fuse is only for the input fuse (next to the connector from the Front Panel Power Switch).

Posted on Feb 24, 2007

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The main fuse should be a 4 amp fuse not a 1.25 amp.

Posted on Jan 27, 2007

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Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852


Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

Jan 04, 2009 | Toshiba 57H81 57" Rear Projection...

4 Answers

Akai PDP4294


Repair service for power board B4K-50:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110646032176

As stated in the listing there please note that there are unique board components that are not replaceable...so depending on the failure there's always a risk that the board may not be recoverable.

Apr 07, 2008 | Akai PDP4294 42 in. EDTV-Ready Plasma...

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