[TechAssist] Mitsubishi WT42311, ch# VK20 open pico fuse F9A02
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Mon, 11 Apr 2005 10:10:17 -0400
This is a compact table top projection set. Cute. Chassis pulls out.
Push power, just a click.
Customer said after a storm (that took out other things in the home)
this set was dead.
On the power supply board I found one pico fuse open: F9A05, a 5 amp
fusing the negative (-) 24 volt source. This supplies negative voltage
to the two convergence IC's IC8C01 and IC8C02, both STK392-110 on
another board.
Nothing else "seems" bad except the fuse. Would you replace the two
converg. STKs as well?
(- )24VDC source runs as follows: smps transformer pin 22 to F9A05, to
diode D9A61, filtered by caps C9A72 and C9A73 both 330uF@35V, and
exiting at edge connector "KF" pin 15,16, coupling the power board to
the deflection board where the STK392-110's live. All the lo-ohm fuses
near STKs are OK, no diodes seem bad.
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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