5-30 888-2586-001 9/15/06
WARNING: Disconnect primary power prior to servicing.
Platinum Z16HD+Section 5 Maintenance and Alignment
!
WARNING:
REFLECTED POWER CALIBRATION MUST BE COMPLETED FIRST TO PROVIDE
VSWR PROTECTION DURING THE FORWARD POWER CALIBRATION PROCE-
DURE. THIS REQUIRES THE USE OF AN EXTERNAL WATT METER CAPABLE OF
READING 300 WATTS.
5.16 Removing/Replacing Firmware ICs
Each of the controller boards, with the exception of the Life Support Board, have 2
Firmware ICs which contain the software for the microcontrollers. It is possible that
these may need to be replaced as part of a firmware upgrade, or they may need to be
transferred from a defective controller board to a new one. Each of these IC’s has a
printed label on top which gives:
a. The part number of the software.
b. The revision number for the software.
c. A U## component designator to locate the correct socket on the board. The fol-
lowing is a list of the component designators for each of the Firmware IC’s:
1. Master Controller - U18 and U28
2. PA Controllers - U23 and U30
3. PS Controller - U5 and U8
!
WARNING:
BE SURE TO USE AN ANTI-STATIC WRIST STRAP WHEN HANDLING PC BOARDS
OR IC’S TO PREVENT DAMAGE TO THE COMPONENTS.
5.16.1 Firmware IC removal:
STEP 1 Shut off the Low Voltage breaker in the back of the transmitter. Pull out
the controller and remove the pc board hold-down bracket.
STEP 2 It will be necessary to remove the appropriate PC board and place it on an
anti-static work surface (a large anti-static bag works well if an anti-static
mat is not available). PA and PS controllers have cables attached at the rear
of the card whose position should be noted before removal.
STEP 3 Note that the PA and PS Controllers have an ID setting which means
they must be placed back in the same slot from which they were
removed.
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