[TechAssist] Toshibas, CF3566A,CF3572B,(TAC9190)shut down issues,fixes

  • From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
  • To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
  • Date: Thu, 11 Sep 2003 12:58:10 -0400

Both 35" Toahibas in for shutting down intermittantly, getting
progressively worse until one stayed dead.
Both Chassis# TAC9190.
One came to life replacing an open cap C871 (22mfd/50V) on the smps
board.
The other came up with the same C871 (22mf/50V) cap plus a regulator
Q840 (LM78MR05) that was outputting about 5.75VDC on a pin that should
have been a steady 5VDC Standby. Measure that output across the
100mfd@xxxx Cap C844. Near the LM78MR05 IC.
Always ESR all caps,and solder good.
The group helped a lot with these.Good group.
Phil Bader
-- 
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821      
email: tjanphyl@xxxxxxxxxxxxxxx
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