Re: Kenwood KT-747L Tuner
- From: Brasto <bram.stolk@xxxxxxxxx>
- Date: Wed, 28 May 2008 01:53:30 -0700 (PDT)
On 28 apr, 18:49, Chuck <c...@xxxxxxxx> wrote:
On Sat, 26 Apr 2008 12:56:40 -0700 (PDT),Brasto
<bram.st...@xxxxxxxxx> wrote:
This Tuner does not have any audio output. Probing its ckts with the
Oscilloscope showed that at two identical IC's marked 5223 5711 the
audio is present at one pin only. It looks like the system is in a
MUTE mode or the signal is not switched to the output-jacks. The front-
End and Tuning ckts are OK.
I cannot find any data on the IC's , schematic of the KT-747L would be
very helpfull.........
Is there anybody out here who has some knowledge on this receiver?
TY
Bram
The ics are probably M5223 op amps. Check the pinout of a NTE778A for
the operating parameters. I don't know if this is your problem but
Kenwoods of this era had a problem with electrolytic caps shorting out
in audio circuits. Chuck
Hi Chuck TY for your response,
My problem is solved, close examination showed a solderbridge which
did not make sense looking at the PCB trace and landings. I removed
the excessive solder and PRESTO....the set worked as advertised again.
It's owner failed to explain who made the previous repair
attempt........
.
- Prev by Date: Re: Hp laser jet 1150 220v power IC problem
- Next by Date: Re: Vox AC30 , AC30CC2X, 2005
- Previous by thread: LD player questions
- Next by thread: Peavey XR 886, 1997, mixer amp
- Index(es):
Relevant Pages
|
