9/15/06
888-2586-001
4-41
WARNING: Disconnect primary power prior to servicing.
Section 4 Overall System Theory
Platinum Z16HD+
4.8.1
Master Controller
The Master Controller is responsible for primary transmitter control and is the summary
point for all of the information gathering. It controls and/or receives information from
the PA Controllers, Power Supply Controllers, and Life Support Board, and takes action
appropriate to the operating conditions of the transmitter. It is also responsible for the
transmitter power control, system configuration, calibration, VSWR protection, and the
Transmitter and Diagnostics displays on the front panel.
However, the rest of the control system is designed to operate with the Master
Controller removed from the system in what is called Life Support Mode. The PA and
PS Controllers report to the Master Controller but operate independently to allow them
to continue operating even if the Master is removed. In the event of a Master Controller
failure the Life Support Board disconnects all Master Controller control functions from
the transmitter and initiates minimal protection and control to keep the transmitter on
the air. For more information on Life Support Mode, refer to the Life Support Board
description later in this section.
4.8.1.1
EEPROM U39
The Master Controller has 3 memories, ROM (firmware), RAM (volatile) and an
EEPROM (non-volatile), U39. When the low voltage is applied to the controller it loads
up the program from ROM to RAM and then goes to the EEPROM for all of the
transmitter configuration, calibration settings, power levels, fault limits etc. Basically
EEPROM U39 stores any settings that can be changed in the Diagnostics Display. Any
changes made in the Diagnostics Display will be either automatically saved in the
EEPROM or is saved when the [BACK] button is pressed (i.e. Back to Update).
All the individual bits or bytes of information stored here have a default setting which is
stored in the firmware ROM. When the information in U39 is uploaded to RAM it is
checked against the default values. If it is considered to be out of tolerance (or invalid
data) it will automatically be replaced with the default value from the ROM. When this
happens the fault “EEPROM_DEF” (Default) will be placed in the fault log. The only
time this should happen is when a new EEPROM, U39 is installed in the Master
Controller. Since it is basically blank, all of the default settings from the ROM will be
written to U39 one at a time as it finds they are out of tolerance. After this has
happened, the EEPROM_DEF fault should never happen again. If it does, U39 should
be replaced since a memory location is probably bad. For information on replacing
EEPROM U39 see Section V, Maintenance and Alignments.
The following is a listing of all of the typical values which are stored in the Firmware:
NOTE:
Power values shown are for FM+HD Modulation Format. See Factory Test Data
for actual values of your transmitter.
Summary of Contents for Platinum Z16HD+
Page 4: ...MRH 2 888 2586 001 9 15 06 WARNING Disconnect primary power prior to servicing ...
Page 6: ...9 15 06 888 2586 001 MRH 1 WARNING Disconnect primary power prior to servicing ...
Page 8: ...viii 888 2586 001 9 15 06 WARNING Disconnect primary power prior to servicing ...
Page 10: ...x 888 2586 001 9 15 06 WARNING Disconnect primary power prior to servicing ...
