[TechAssist] RCA F27615 / CTC203AX1 no tuning/no+33v, fix
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Sat, 13 Dec 2003 10:09:55 -0500
This version has the seperate small upright tuner.
measured all tuner pins, none had +33 volts (or even close).
Back at the SMPS (located at front left chassis) located the +33V
source. Starts at smps transformer pin 16, to diode CR14106, branches
off to several pionts. One of which was resistor R14119, 15K ohm/2W.
Open.
This went on to zener diode CR14107 (33 volt)., then C14111
(100mf/63V),C14158 (1mf/100v).
Changing R14119,Zener CR14107 restored the 33V to tuner and operation
was restored. Change the two mwntioned electrolytics as precaution.
Phil
--
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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