[TechAssist] Re: JVC AMPLIFIER MODEL NO. RX 718VBK
- From: "Gary Pahls" <bec@xxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 2 Nov 2005 07:17:26 -0600
Are Q731 & Q733 In the same channel? If so whenever I troubleshoot an amp
without a manual I leave the deffective outputs out a fire it up to see if
the other channel works OK. If it does then I use it to troubleshoot the
bad channel. I'm assuming you checked for proper B+ , B- and bias on the
transistors you changed. Also, don't be brain dead like I am some times,
make sure the tape monitor in not on and check to see that there is not an
open preamp loop on the back of the unit.
Gary Pahls
Beloit Entertainment Center
bec@xxxxxxxxx
----- Original Message -----
From: "R&S ELECTRONICS" <rselect@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, November 01, 2005 8:46 PM
Subject: [TechAssist] JVC AMPLIFIER MODEL NO. RX 718VBK
> Hi Techs
> The unit came as dead only standby light was on. Troubleshooted found
> fuse, Q731(2SB2155) Q733 (2SB1429) was bad. Replaced with NTE 2328 & 2329
> now the set comes on but no sound. Working without the schematic, anybody
> has any tips/hints what should I look for.....
> Are these NTE parts compatible for above unit.
> Thanks
> R&S Electronics,PA
> TEL(717)532-6312
> Email:rselect@xxxxxxxxxxxx
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