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Crumbtrail TV Forums: TV Equipment: Projection TV Forum:
toshiba 50h72

 
 


bowlin
New User

Jul 18, 2006, 7:19 PM

Post #1 of 9 (1706 views)
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toshiba 50h72 Can't Post
Dont wanna still from anyones thread but I am trying to work on my 50h72. Actually I wanna get to the 2 stk392's. I can see them and I am so near but, there is a couple things in my way and I dont wanna mess anything up. If I post a pic can someone possibly help me???



techchris
Veteran

Jul 18, 2006, 8:22 PM

Post #2 of 9 (1701 views)
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Re: [bowlin] toshiba 50h72 [In reply to] Can't Post
post away


bowlin
New User

Jul 19, 2006, 2:53 AM

Post #3 of 9 (1695 views)
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Re: [techchris] toshiba 50h72 [In reply to] Can't Post
maybe this is easier than I thought, posting the pics that is. the reason for so many pics is I wont you to get a fill for the delima, or maybe lack there of.


(This post was edited by bowlin on Jul 19, 2006, 3:08 AM)
Attachments: mydelima.JPG (649 KB)
  IM000665.JPG (649 KB)
  IM000668.JPG (177 KB)
  IM000669.JPG (805 KB)
  IM000670.JPG (788 KB)
  IM000671.JPG (41.5 KB)


techchris
Veteran

Jul 19, 2006, 8:31 AM

Post #4 of 9 (1690 views)
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Re: [bowlin] toshiba 50h72 [In reply to] Can't Post
you will need to unsolder the ic and the support pillars on the heatsink.then the whole lot will lift out of the pcb.if you change the ic's make sure you fit lots of new heat compound or they will fail again,and dont use cheapo Chinese ic's either


bowlin
New User

Jul 19, 2006, 6:58 PM

Post #5 of 9 (1685 views)
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Re: [techchris] toshiba 50h72 [In reply to] Can't Post
ok you are talking about the big metal pc which the stk392's are attached to correct unsolder it as well? OK another newbie question hwo do I know if it has been soldered on, I know you know, but what do I look for???Sly


techchris
Veteran

Jul 20, 2006, 9:39 AM

Post #6 of 9 (1684 views)
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Re: [bowlin] toshiba 50h72 [In reply to] Can't Post
the metal heatsink has pillars that go through the pcb and are soldered into the circuit.If you have not done soldering before you will find this job difficult. you need to unsolder the two rows of connections on each ic and the heatsink pillars from underneath.you need a good soldering iron that is not too hot for the ic but will adjust hot enough to unsolder the heatsink pins and a good solder mop to soak up the old solder.


bowlin
New User

Jul 20, 2006, 12:59 PM

Post #7 of 9 (1679 views)
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Re: [techchris] toshiba 50h72 [In reply to] Can't Post
Chris,
I hope this dont offend ya, but when you say soldered into circuit, does this mean my best bet is to take the whole board out of the tv and do it outside of the tv, the only thing holding the board in now. I think is a white peice that is connecting both boards, kinda hard to get to but will do my best.


techchris
Veteran

Jul 21, 2006, 8:02 AM

Post #8 of 9 (1673 views)
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Re: [bowlin] toshiba 50h72 [In reply to] Can't Post
usually screws around the edge holding pcb to plastic frame.the edge connectors flip up to disconnect,unplug any flying leads


bowlin
New User

Jul 30, 2006, 1:50 PM

Post #9 of 9 (1635 views)
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Re: [techchris] toshiba 50h72 [In reply to] Can't Post
Took the board out last week, ordered the 2 392stk's, will take board and the new chips to work tomm and see if the maint. guys can help me do a little unsoldering and soldering. Hope to be putting board back in Monday night and watching tv sometime this week coming all wish me luck.
Attachments: board out.jpg (59.1 KB)
  new stk.jpg (58.4 KB)

 
 
 


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