Service manual
KB2LJJ Radio Mods Database and Manuals
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vy 73 Norbert DC6BC @ DB0IZ.#NRW.DEU.EU
MODS OF KENWOOD TM-733 for Japanese version
Maybe there are some difference for USA , EU and another vartion. So please use caution.
1. Remove the control panel. You can find CPU board.
2. Remove 2 screws on this board. Then turn insde out this board.
3. You can find a chip that printed [ 000 ] on this board.
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I xx I xx meams [ 000 ]
I O O I O means hole of screw
I I
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4. After remove this chip [ 000 ] , you can recieve as ffollows.
on 144MHz on 430MHz
118-173MHz 118-173MHz
130-173MHz 300-469MHz
300-469MHz 800-900MHz
On 144MHz side , press [ MHz ] key more than 1 sec. , change mode for AM.
On 430MHz side , change band for 800Mhz.
TM-733A Quick Reference Guide
Assembly Mode Test
In the TM-733 Service Manual, it describes a test mode that I haven't seen mentioned anywhere else. So, here's the scoop:
Entering Assembly Mode: [CALL] + [MUTE] + [Power On]
All LCD segments should come on. (To exit, power off.)
Press the [VFO] key. *This must always be done first*
The serial port is checked and "F" with "80" on the display indicates test passed. "1" or "2" means failure.
Different keys now show different displays, with [LOW], [SHIFT], [TONE], and [REV] also adjusting the backlight intensity.
Set the dials to minimum, then press the [MR] key. Each of the dials shows the digitized level.
This looks useful for checking all the keys and dials when you suspect a bad connection.
Kenwood TM-733A Quick Reference Guide by Brad Killebrew N5LJV
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[#] PRESS A NUMBER, NOT THE POUND SIGN.
[KEY] PRESS AND RELEASE [KEY]
[KEY1]+[KEY2] PRESS AND HOLD [KEY1] DOWN, THEN PRESS [KEY2]
[KEY1],[KEY2] PRESS [KEY1] MOMENTARILY, THEN PRESS [KEY2]
[KEY]+[PWR] WITH POWER OFF, PRESS AND HOLD [KEY] THEN HIT [PWR]
[KEY1]+[KEY2]+[PWR] YOU GET THE IDEA.
http://www.kb2ljj.com/data/kenwood/TM-733.htm (3 di 9)30/08/2009 18.42.07