[TechAssist] Mitsubishi CS-2610R had audio squeel/feedback one channel, then noaudio: FIX
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Mon, 10 May 2004 13:35:51 -0400
As the stereo sound TV Mits model CS2610R set warmed up, one channel
got distorted and a "squeel" came from that channel. Later it worstened
until no audio.
Cause was a series of leaking electrolytics around the audio output IC
(IC3A2, LA4270).
Circuit board was darkened on bottom and stained on top. Chemically
cleaned both sides with brush and alcohol wash. Dried well, and chenged
following parts: (values in microfarads)
Capacitor electrolytics:
C3C1: 4.7/50V
C3F0: 22/50V
C3C7: 470/35V
C3C8: 470/35V
C3C3: 100/10V
C3C4: 100/25V
C3CO: 4.7/50V
C3C2: 100/10V
IC3A2: LA4270
Finally,one square 8 ohm left speaker (raspy,bad cone)
Fixed.
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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