Figure 9-1. Gcai Connector - Motorola ASTRO XTL 5000 Basic Service Manual

Chapter 9 Basic Troubleshooting
9.1 Introduction
This chapter contains troubleshooting charts, error codes, and flexible circuit information. This
section can help you isolate a problem to the board level. Board-level troubleshooting does not
attempt to isolate problems to the component level. Component-level service information can be
found in the ASTRO Digital XTL 5000 Mobile Radio Detailed Service Manual. (See the
Publications" section of this manual on
NOTE: To access the various connector pins, use the housing eliminator/test fixture along with the
diagrams found in this section of the manual. (See the section,
Recommended Tools"
numbers.)
!
C a u t i o n
9.2 Accessory Connectors
9.2.1 J1 - Global Core Accessory Interface (GCAI)
A GCAI connector is located on the O5 control head and the transceiver interface board (TIB). The
GCAI connector on the TIB contains a sub-set of the signals contained in the O5 control head GCAI
connector. Table 9-1
TIB GCAI connector.
on page
With the exception of some inputs on service monitors, a suitable attenuator
rated at 100 W or more should always be used with all test equipment
connected to the RF connector. Failure to do so can result in test equipment
damage.
When performing both transmit and receive tests, it is still possible that
equipment might be damaged by the radio's transmitter. This could occur
under the following conditions: trunking-mode affiliation, missing emergency
jumper, a defective PTT button, unintentional PTT activations, or circuit
board malfunction. Therefore, an attenuator is always recommended.
describes the function of each pin including which signals are present on the
3
7

Figure 9-1. GCAI Connector

page xvi for the specific manual number.)
4-2, for the appropriate Motorola service aids and tools parts
2
1
4
5 6
8
9
10
"Related
"Service Aids and