Eprom Change - Philips FM92E Manual

17: EPROM Change:

•
Remove cover on Synthesiser board side from the FM92E Transceiver, this is the side closest to the two
sockets at the rear of the FM92E transceiver. Then mark the cover with your call-sign, then place it & the
cover's screws into their GLAD bags & mark your Glad bags with your call sign. Should be a minimum of
5 screws.
•
Remove cover from receiver side of FM92E transceiver. This is the side furthest away from the rear two
connectors; Side closest to the antenna connection. Unscrew the six screws from the Receiver PCB and
swing out.
•
Check out and note the IF frequency on the side of the RF/Mixer module. [It is normally hand written.] It
should be 10.7 MHz or 21.4 MHz.
•
Note if the FM92E transceiver is remotely or locally controlled.
•
Note the center frequency or single frequency your transceiver was working on.
•
Undo screws, holding the Synthesiser board down. Swing Synthesiser board out.
•
Remove can covering the EPROM socket. [4 screws] Place Can & Screws into Glad bag.
•
Solder single fuse holder onto positive power lead [red cable from transceiver; NOT red lead with black
dashes]. Or; remove fuse section on earth lead from transceiver, then connect this section via fuse to
the positive section of the red wire from the transceiver.
removal.
•
Solder 12 Volt black cable power cable onto the earth lead from the transceiver [red with black dashes]
and red onto end of fuse. * This can be done before EPROM can removal.
•
Plug in Test EPROM
to EPROM socket; For testing the FM92E Transceiver from 68-88 MHz. EPROM notch points away from
hinges of Synthesiser board.
•
Apply 12 Volts to the FM92E Transceiver. Check that audio emanates from the speaker
•
With a Signal Generator check that FM92E receiver mute works under 4 micro Volt on test frequency
and note this reading.
•
Connect VHF Power Meter and press PTT button so a power out is registered on the Power Meter. Note
the power reading.
•
Disconnect Power.
•
Remove EPROM.
•
Plug in EPROM
EPROM socket. EPROM notch points away from hinges of Synthesiser board.
•
Replace EPROM tin box over EPROM, 4 screws.
•
Screw down the Synthesiser board.
•
Replace cover for Synthesiser board side.
•
Go to Section 3, and check out which 6m?t?.bin file meets the above criteria for testing. eg The FM92E
is a remotely controlled transceiver with a 21.4 MHz IF. Then download the test file, to initially check
the transceiver. [ie download file 6m?t?.bin.]
Download the test file that represents your Philips FM92E on the web site, or on the clubs main PC;
•
[http://vk2afy.dyndns.org/6mconv/6mfiles.htm] for burning the 2764 EPROM for your Philips FM92E.
•
Check that your FM92E transceiver works by using the information on Section 38: FM92E Test EPROM
68-88 MHz.
•
Then again go to Section 3, and check out which 6m??.bin file meets the above criteria for running on
6 meters. eg The FM92E is a remotely controlled transceiver with a 21.4 MHz IF. Then download the
actural file, to run the transceiver on 6 meters. [ie download file 6m??.bin.]
•
•
CCARC members will be given a burnt 6 Meter 2764 EPROM's to be placed into their transceiver for
testing and running on 6 meters..
Philips FM92E Conversion to 6 Meters:
6mr912t.bin
[EPROM for Philips FM91E converted to FM92E with remote head]
6mr3.bin
[EPROM for Philips FM91E converted to FM92E with remote head] to
* This can be done before EPROM can
Version 3.9 Page 20