home *** CD-ROM | disk | FTP | other *** search
- TH47A.2
-
- Subject: N2MODification File for Kenwood TH-47A 440 Mhz HT
- -------------------------------------------------
-
- 1) Remove battery and antenna.
- 2) Remove case as follows: Remove volume,squelch and tuning knobs by
- pulling straight off.Remove shaft nuts using needle nose pliers or
- other such tool.Remove 4 screws from the case.NOTE: Do not remove
- the 2 screws that are on either side of battery release latch.Lift
- plasctic top from radio while separating the radio halves.
- 3) Open the radio up like a book and place on work surface.
- 4) Cut or unsolder green wire loop on the control board.
- 5) Reassemble radio,Reset microprocessor.
- Radio will cover 400-470 MHZ.While scanning,a beeping sound will be heard
- at the band edges indicating PLL unlock condition.To eliminate this annoyance:
- 1) Open up radio as indicated above.
- 2) Lift up microprocessor IC303 leg # 62(This is the bottom microproccessor)
- (Third leg on left side from the bottom)This should be done only by those
- comfortable working with SMT components.
- 3) reassemble radio.
- Radio will now cover 400-470 MHZ RCV/XMIT with no annoying beeps during
- scanning.Leg # 62 is the UL input to the microprocessor to tell it that an
- unlock condition is ocurring.With no input,the Microprocessor thinks that
- the radio is always locked,and no error beeps will sound.This MOD also allows
- XMIT,but that is the price you have to pay :-)
- I have done this MOD to my radio with no ill effects.This MOD should also
- work on the TH-27A.
- *****This MOD courtesy N2MOD*****
- Paul,N2MOD @ NY2S.#NLI.NY.USA.NA
-