Modifications for the Kenwood TH-225



19-07-1998 Kenwood TH225A modifications

The TH-251A is very similar to the TH-225A. The following TH-215A mod has been tested on the TH-225A and seems to work, thanks Steve(W9OMX).
All the standard disclaimers apply, use at your own risk, etc.

73's John - WA8ZGO - [email protected]

Date: 2 May 88 15:22:00 GMT
Posted by: [email protected]
Subject: Kenwood TH-215A modification
KENWOOD TH-215A handheld transceiver out-of-band modification:

  1. Remove two screws from belt clip
  2. Remove 4 screws from back of radio
  3. Slide front assembly off
  4. 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                      |
                  |                                      |
                  +--------------------------------------+
  5. Reassemble radio.
  6. Reset microprocessor: Turn radio on while simultaneously pressing both _F_ key and _ENTER_ key.