GDP-32
II
INSTRUCTION MANUAL
May 2002 Section 17, Page 16
17.3 DIGITAL BOARD PROBLEMS
The GDP-32
II
has a modular design. One advantage of a modular design is that board problems
are often solved by simply inserting a replacement board. Repairs of the original board are then
saved for Zonge Engineering repair representatives. This procedure saves valuable field time.
NOTE: All digital boards are sensitive to static discharge, so make sure you use a grounding
mat and strap when you handle the boards.
THE CALIBRATION AND TIMING BOARD
The Calibration and Timing Board (BD244 or BD288) supplies the timing reference for the time
and frequency domain waveforms utilized by the GDP-32
II
. See Section 17.1 for instructions on
using the Diagnostics Program for trouble-shooting problems. Defective boards should be
replaced. Do not attempt to repair a faulty board.
NOTE: Do not turn on power to the receiver unless the Calibrate and Timing Board is plugged
into the analog card cage, and all board wiring connections are made.
THE FRONT PANEL ASSEMBLY (MPU AND BD287 BOARDS)
The Front Panel Assembly (see Figure 16.2 (a)) includes the panel with its membrane keyboard,
the display, the MPU board, hard disk, memory, LAN, and the BD287 board.
The BD287 board performs all peripheral digital functions not available directly on the MPU
board. Included on BD287 are sockets for the MPU and Flash RAM cards.
Defective boards should be replaced. Do not attempt to repair a faulty board.
17.4 ANALOG BOARD PROBLEMS
Analog Boards are easily checked for proper operation with the Diagnostics software (See
Section 17.1 above). Defective boards should be replaced. Do not attempt to repair a faulty
board
REMOVING ANALOG BOARDS
1. Disconnect the input cables from the calibrate/timing board and the analog cards.
2. Pull the board straight out of the bus connector.
REPLACING ANALOG BOARDS
1. Make sure that board components face to the right as you are looking into the card cage.
See Section 17.2 above.
2. Insert the replacement board.
3. Reattach the input cables to each analog card and the calibrate/ timing card. Make sure
the analog cards are connected in order.
In order for all boards to work correctly, all boards must be plugged in and wired consecutively,
without any missing boards or connections.
Before trying to debug problems with any of the boards, call the Zonge Tucson Office, or send us
a fax or email message with a description of the problem. Our staff is more than happy to help
with any problems concerning our equipment.
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