[Kenwood] TS440 Distorted Receive audio

Sat Nov 23 15:15:10 EST 2013

I had a similar situation with a TS450 it wound up being the pll board. It also garbled the transmit audio. 
TS440's are known for lots of board issues. 
They were more popular in Canada than in the states. 
73
KA9DVL
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-----Original Message-----
From: Matt Boehm
To: Kenwood
Sent: November 23, 2013, 2:20 PM
Subject: [Kenwood] TS440 Distorted Receive audio
Hell all,
My 14 year old Technician class son has a TS440 that is exhibiting 
distorted RX audio on all bands and modes.
This unit does not have any epoxy issues. There is absolutely no epoxy 
in or around the VCO components.
I attempted to adjust the can on VCO 5. this did not remedy the problem.
Following the directions from the following website.......
http://www.oz1bxm.dk/TS440/TS440S_Repair_FAQ.pdf
The most common symptom is the PLL unlock. Reset the transceiver by 
holding in the A=B button as
power is turned on. Even if the display only shows decimals, only the 
(band pass filter) BPF for 14 MHz
should be turned on. Using a DC voltmeter, measure the voltage at coils 
L11, L15, L21, L28, L34, L40,
L46, L52, L58, and L62. Only coil L52 should measure 8 Vdc. The other 
coils should read 0 Vdc
All voltages check out Ok. I am still recieving garbled audio..
I was wondering if anyone in the group has run across this issue and 
could point me in the right direction.
Thanks
Matt N3BHM
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