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peterb



Joined: 24 May 2008
Posts: 4
Location: Tyler, Tx

PostPosted: Sat May 24, 2008 10:11 pm    Post subject: JVC AV48WP34 Reply with quote

This set had bad STK IC's. I can't get the convergence to adjust.
Also there is no customer menu. I get a black box on the screen when trying to get the menu on.
Any ideas?
TIA,

Peterb
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kuhurdler



Joined: 28 Dec 2006
Posts: 2852
Location: Overland Park, KS

PostPosted: Sun May 25, 2008 8:48 am    Post subject: Reply with quote

sounds like a communication error with the eeprom. I think you're going to need to start using the oscope.

you might want to take a look at this thread though:
http://www.freelists.org/archives/techassist/06-2005/msg00746.html
Jesse Mack



Joined: 22 May 2008
Posts: 600
Location: The Last Frontier

PostPosted: Tue May 27, 2008 7:33 pm    Post subject: black box - no cust menu - convergence will not adjust Reply with quote

Sounds like two possibilities, These IC's are in the front and when you remove the board to replace them it is exceedingly easy to unplug or partially unplug some harnessing. This could cause the loss of menu's.
As to the Convergence problem, When these IC's fail they invariably cause the 1 watt resistors on the pcb to open. They are of low resistance value and are very important. The convergence WILL NOT ADJUST if they are not replaced. Value of these components is critical, do not substitute with something just close. Also, not knowing your experience, it is exceedingly easy to cause solder bridges on the IC's. I use a loup to check before reassembling.

Good Luck
Jesse
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