Modifications for the Kenwood TH-215
TH-205/215 Protection Fuse Replacement
When a plug other than the PG-2V or PG-3C is inserted into the DC IN jack,
the ground side of the jack may not disconnect. This may cause the
external DC power to be supplied directly to the internal battery which
results in overheating the battery and blowing the fuse. To protect the
battery, replace the fuse with a protection diode, part number ERB83-004.
Note models with serial numbers greater than 801XXXX allready incorporate
this diode as D16.
This modification may be performed under warranty.
Time required for this change is 1/2 hour or less.
TH-215A to TNC
The hook-up of a th-215a to my pac-comm tiny 2 tnc was very easy.
There are no components involved in the connection. All you need are
two phone plugs: 1 sub mini, and 1 stereo(3 conductor) mini.
Both available from radio shack,two to a pack.
if you have a kenwood speaker mike, then the instruction sheet will
contain a drawing showing the basic connecting lines. if not, heres
how its done:
The sub-mini is the speaker plug. The center pin goes to the speaker pin
on the 5 pin din on the tnc, the shaft is the ground.
On the mini stereo plug, you dont use the center pin, just the two
shaft connections. the short shaft goes to mike, the long shaft is the
push to talk......thats it, four wires to the connector that goes to
the tnc plug, and youre in business!!
One very very important thing-----always make sure that all battery
save functions on the handy talkie are off. if it isnt, a slight delay
in receiving will cause retrys from the station sending to you, and
will delay packet reception at your end. please make careful note of this.
Any questions, reply to K2JOV, HARRY, at N2ELC-4 BBS in n.j......good luck!!
KENWOOD TH-215A out-of-band mod
Remove two screws from belt clip
Remove 4 screws from back of radio
Slide front assembly off
Locate set of 4 jumpers:
(top front inside)
| +--------+ |
| | | |
| | | |
| +--------+ |
| +--------+ |
| | | |
J4: intact | J4 o---o | | |
J3: cut | J3 o) (o +--------+ |
J2: cut | J2 o) (o |
J1: cut | J1 o) (o |
| SPKR |
| mic |
Reset microprocessor: Turn radio on while simultaneously pressing
both _F_ key and _ENTER_ key.
A TH215 no audio fix
Subject: Re: Kenwood TH-215A no audio problem
Organization: Hewlett-Packard Co., Corvallis, OR, USA
>In a sample population of about 60 amateurs in this town, three of us
>own Kenwood TH-215A HT's, all purchased separately at different times
>from different sources....
>ALL THREE have developed an audio problem in the last eight months:
>the audio (both from the microphone and from the keypad) simply
>disappears at unpredictable intervals. And all three can be "fixed"
>by WHACKING the HT with the palm of one's hand--until it happens again.
A POSSIBLE FIX:
You guys may be in luck, since I fixed mine -- I have the service manual
and decided to jump in (I had upgraded the software and you have to pull the
unit completely open to do it -- ). Anyway, I was using the rig one day and
the next -- no audio -- just a slight noise that appeared to be white noise
from the final audio buffer. When plugging in the speaker mike -- same
problem. Touch the TTPAD and get your ears blown away -- I think beep also
worked. Kenwood had no knowledge of previous problems.
I had to rig-up a jumper ribbon cable so I could lay the rig out for
testing and immediately checked the input audio to the volume control.
No problem -- but there was nothing coming out the other side. I
jumpered the pot (i.e. simulate pot max volume) and my ears were
hurting. Upon removal of the pot I found a crack on the ALPS pc board
that has the leads mounted to it. Apparently, I must have hit the
volume control pot the previous day and cracked the pot trace (again
this trace was part of the pot not the rig pcb). I had noticed when I
disassembled the unit that there was no nut on the pot to hold it in
place (none on the squelch either). The volume pot is right at the edge
of the unit and is the most likely knob to get hit.
When parts arrived, it came with a nut so I installed it to help prevent
this problem in the future -- no problems since.
I think the switched volume pot cost $4.95 + $3.00 shipping.
I also picked up a set of backcase screws -- very small
heads but very long screws to replace my old ones -$.05 - Make sure you have a
"good" screwdriver that really fits.)
All these problems sound like the same thing. I have never had any problems
with my rig, and I bought one of the first ones out. (Hence, the software
update to give me the ability to lock out memory channels during scan.)
TH-215 jumper modification
The Th215 tranceiver can be modificated by setting jumpers in the
J1 J2 J3 J4 RX TX step DTMF TONE
1 1 1 1 144-146Mhz <== 20k YES 38 tone
1 1 1 0 141-163Mhz 144-146 5k YES 38 tone
0 1 1 1 144-146Mhz <== 5k NO TONE1750hz
1 0 1 1 144-146Mhz <== 5k NO 1750 hz
0 1 1 0 144-146Mhz <== 12.5k NO TONE/1750hz
1 0 1 0 144-146Mhz <== 12.5k NO 1750 hz
0 0 1 1 144-148Mhz <== 5k YES 38 tone
1 1 0 1 141-163Mhz 144-148 5k YES 38 tone
0 1 0 1 141-163Mhz 141-151 5k YES 38 tone
0 0 0 1 141-163Mhz <== 5k YES 38 tone
0 0 1 0 134-148Mhz <== 5k YES 38 tone
1 0 0 1 154-174Mhz <== 5k YES 38 tone
0 = No jumper
1 = jumpered
73 de Rune, LA9HAA @ LA1B
Message timed: 17:31 on 20 Sep 95
Go Back To The Kenwood Mods Page
Go Back To The Main Modifications Page
Go Back To The CB / HAM Radio Main Page
Go Back To The Main Home Page
Copyright © The Defpom 1997-2008