A16 Processor/Video Board Firmware Roms - Agilent Technologies 8590 Series Service Manual

A16 Processor/Video Board Firmware
ROMs
This procedure applies to:
Use ESD precautions when performing this replacement procedure.
CAUTION
Removal
1. Remove the instrument cover assembly. Refer to the
2. Remove the A25 Counter-Lock assembly. Refer to the
3. Note the location of the four firmware ROMs: A16U6, A16U7,
4. Carefully pry the ROMs upward using a small-blade screwdriver.
Replacement
To prevent damage to the ROMs, make sure that the ROMs are
CAUTION
oriented correctly with the sockets on the A16 assembly. Match the
notch (2) at the end of each ROM with the notch at the end of its socket.
Align each ROM IC pin with the opening of its pin receptacle on the
socket.
1. Position each ROM on the A16 assembly as illustrated in
2. Install each ROM by carefully pushing down on both ends of the
3. Replace the A25 Counter-Lock assembly. Refer to the
4. Replace the instrument cover assembly. Refer to the
5. Continue at the
Chapter 7
8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
Cover." removal procedure.
Counter-Lock Assembly."
A16U23, and A16U24. Refer to
Pull the ROMs from their sockets evenly so that the IC pins (1) at
the rear of each ROM are not bent.
Figure 7-15.
ROM with equal pressure.
Counter-Lock Assembly."
Cover." replacement procedure.
"Adjustments Required after ROM Replacement."
procedure.

A16 Processor/Video Board Firmware ROMs

removal procedure.
Figure 7-15.
replacement procedure.
Replacing Major Assemblies
"Instrument
"A25
"A25
"Instrument
335