Mini-Convectron Module with RS-485
47
Instruction Manual - 275545
Saf
e
ty Ins
tructions
Introduction
Installatio
n
O
p
e
ra
tion
M
a
inten
ance
Calibration
Chapter 5
Maintenance
5.1
General Information
Although the Mini-Convectron was designed using as many commonly
available components as possible, thus allowing easy service, it is still
recommended that only qualified technical personnel attempt repairs.
If difficulties are encountered during use of your Mini-Convectron, the
following list of symptoms and possible causes, along with the schematics,
can prove useful in quickly getting back into operation.
If the prescribed remedies do not correct the troubles, or if additional
assistance or special parts are required, contact the Technical Service
Department, Granville-Phillips, 6450 Dry Creek Parkway, Longmont,
Colorado, 80503. Telephone: 303-652-4400. Repairs properly made with
equivalent electronic parts and rosin core solder, which do not damage
other portions of the unit, do not represent a violation of the warranty.
Check Table 5-1 for the observed symptoms. This listing of symptoms and
possible causes is not complete, but should be sufficient to solve most
problems.
All possible causes of failure should be thoroughly explored
before attempting any repair.
5.2
Guidelines
Since the Mini-Convectron contains static-sensitive electronic parts, the
following precautions must be followed when troubleshooting:
1.
Use a grounded, conductive work surface.
2.
Use static dissipative envelopes to store or ship printed circuit boards.
3.
Do not
handle the printed circuit board more than absolutely
necessary, and only when wearing a ground strap.
4.
Do not
use an ohmmeter for troubleshooting. Rely on voltage
measurements.
5.
Use grounded-type soldering irons only.
5.3
Mini-Convectron
Disassembly
For most troubleshooting procedures it will be required that the printed
circuit board and gauge tube be removed from the enclosure. To
accomplish this proceed as follows:
1.
Remove the eight screws holding on the two end plates of the module.
2.
Remove the top and bottom chassis members leaving the PC board
assembly with the gauge tube.
3.
To remove the gauge tube from the PC board simply unplug from the
four sockets on the board.
4.
For assembly, reverse this procedure. Make sure the PC boards are in
the slots of the chassis.
