5-18 888-2406-002
WARNING: Disconnect primary power prior to servicing.
Maintenance and Alignment
5.13.4 Replacing the Master Controller Board
In the unlikely event that the Master Controller Board needs to be replaced, there
are two possible scenarios:
a. Replacement using EEPROM U39 from the old board. This procedure should
be tried first.
b. Replacement when using a New EEPROM U39.
In either case, the Firmware IC’s U18 and U28 will have to be transferred from the
old board or be replaced with new. EEPROM U39 contains all of the customer, and
Backup, configuration and calibration settings for the transmitter including
configuration, software calibration settings and fault limits etc.
5.13.4.1 Replacement Using EEPROM U39 From Old Board
If the Master Controller needs to be replaced, but EEPROM U39 can be swapped
from the old board, then proceed as follows:
STEP 1 Shut the transmitter off and remove AC power from the transmitter.
STEP 2 Remove the defective Master Controller Board. Carefully remove U39.
STEP 3 Remove U39 from the new Master Controller Board and replace
with the EEPROM from the defective Master.
STEP 4 To transfer the Firmware IC’s from the old board to the new one or to
simply install new firmware refer to “Removing and Replacing
Firmware ICs” later in this section, then return here.
STEP 5 Set all dip switches on the new board to the same position as the one
being replaced. Typical settings are:
•S1-1 through S1-4 - Customer set RS232 ID
•S1-5 ON for U39 model 25040 and Firmware part # 917-2435-206
or 917-2435-207 for the Z2R, revision “AA” or later Master Con-
troller code.(S1-5 set to OFF for use with U39 model 25C04 and
any part number firmware).
•S1-6 through S1-8 OFF (Factory use only)
•S1-9 OFF (RESET)
•S1-9 OFF (ON = Microcontroller RESET)
•S1-10 ON (APC ON)
STEP 6 Install the new Master Controller Board and apply AC power to the
transmitter.
STEP 7 It is a good idea to verify the transmitter configuration settings in the
Diagnostics Display.
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