Test And Measurement; Introduction; External Testing; General Information - Panasonic EB-GD35 Service Manual

EB-GD35 EB-GD35C

6 TEST AND MEASUREMENT

6.1. Introduction

This section provides information on testing the telephone. The layout is as follows
1. Section 6.2 External testing: describes equipment requirements and general set up procedure.
2. Section 6.3 Complete Unit Test Setup: describes how the items of test equipment are used together and general set up
procedure.
3. Section 6.4 Channel box test commands: provides detailed explanation of the different commands available using the test
equipment and channel-box software.
4. Section 6.5 Adjustment mode: describes adjustments available on the handheld unit.

6.2. External Testing

6.2.1

General Information

The handset can be connected to a compatible personal computer for electronic adjustment and fault diagnosis. This section
provides a description of the equipment required to perform those tasks.
Testing and adjustment of the handheld unit can be performed with the outer case in place and the cradle connected. For in-depth
fault finding the unit should first be disassembled, as detailed in Section 4, and then the PCB Repair Jig used to connect the PCBs
together externally as they would be found in normal use. Fault tracing can then be performed on the PCBs using suitable test
equipment, such as spectrum analysers and oscilloscopes.
The unit must now be tested and calibrated for both frequency bands (900 MHz and 1800 MHz).
6.2.2. Jigs and Tools
Interface Box (Part No. IFB003 / IFB004)
The Interface box provides:
IFB003: Voltage regulation for +7.2 V, +5.6 V or 4.8 V DC outputs. The +7.2 V switch setting is used as a supply to Li-Ion type
batteries (compatible for other products), the 5.6 V switch setting is used for PCB testing and the 4.8 V switch setting is used for
testing the complete unit.
Interface Box IFB004 is a later version that provides +4.8 V, +7.2V and +8.2 V DC outputs. It also allows selection of external power
via the Interface cable.
RS 232 interface. Ensures that the Unit Under Test is supplied with the correct signal levels and format.
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Personal Computer (PC)
The PC (IBM compatible) is used as a Unit Under Test controller. This in conjunction with the channel box software, allows all of the
test facilities normally provided through the keypad of the Unit Under Test.

Power Supply

Provides 12 V DC supply to Interface box IFB003 or IFB004.
http://cxema.ru
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Figure 5.1: Interface Box IFB003 / IFB004
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