Motorola VRS750, Service Manual

Page: 61 / 104

49
Maintenance and
Troubleshooting
7
The following paragraphs contain information to help you maintain
and troubleshoot the VRS. A list of recommended test equipment is
found in the “Recommended Test Equipment, Service Aids, and Tools”
section of the ASTRO Spectra Basic Service Manual, Motorola
publication 68P81076C20.
Additional information may be found in the Troubleshooting Chart in
this manual.
Troubleshooting
Procedures
VRS Activation
1. Turn on the mobile radio control head. The radio should go
through self-check and then display the home mode of the
mobile radio.
2. Possible error messages on power up are:
• ERR 12/10—No VRS detected. See “Common Power-Up
Problems” section on page 50 for possible solutions.
• ERR 12/81—Flash EPROM failure. If re-flashing the unit does
not fix this problem the transceiver should be replaced.
• ERR 12/82—Codeplug checksum error. After verifying that
both mobile and VRS have the correct software version,
checking the mobile-to-VRS connection, and moving the
cable away from any interference, reprogram the VRS750’s
codeplug using the correct version of the CPS. If the codeplug
cannot be corrected using CPS then the unit will need to have
a new default codeplug written to the unit. Contact Customer
Service for the default codeplug that corresponds to your
model (see Table 7).
Table 7. Default Codeplugs
Band
VRS750
Model No.
VRS750
Back Cover Kit No.
Internal
Codeplug No.
VHF P2080 PMLD4196 PMUD1479
UHF R1 P2081 PMLE4242 PMUE1433
UHF R2 P2082 PMLE4243 PMUE1476