Panasonic EB-GD30 Service Manual

Also see for EB-GD30: Operating instructions Technical guide

TEST AND MEASUREMENTMCUK991001C8 Section 6 Issue 1Service Manual – 29 – Revision 06 TEST AND MEASUREMENT6.1 IntroductionThis section provides information on testing GD30 and GD50 telephones. 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 upprocedure.3. Section 6.4 Channel box test commands: provides detailed explanation of the different commands available using the testequipment and channel-box software.4. Section 6.5 Adjustment mode: describes adjustments available on the GD30/GD50 handheld unit.5. Section 6.6 Lock code: describes the procedure to check or reset the lock code using the Channel box software.6.2 External TestingThe GD30/GD50 unit can be connected to a compatible personal computer for electronic adjustment and fault diagnosis. Thissection 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 connectthe PCBs together externally as they would be found in normal use. Fault tracing can then be performed on the PCBs usingsuitable test equipment, such as spectrum analysers and oscilloscopes.The unit must now be tested and calibrated for both frequencies (900 MHz and 1800 MHz) as well as for the two battery types.6.2.1 Jigs and ToolsTest Equipment Descriptions1. Interface box,Part Number: IFB003/IFB004The Interface box provides:a. 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 switchsetting is used for testing the complete unitInterface Box IFB004 is a later version that provides +4.8 V, +7.2V and +8.2 V DC outputs. It also allows selection ofexternal power via the Interface cable.b. RS 232 interface. Ensures that the Unit Under Test is supplied with the correct signal levels and format..Figure 6.1: Interface Box IFB003 / IFB0042. Personal Computer (PC)The PC (IBM compatible) is used as a Unit Under Test controller. This in conjunction with the channel box software, allowsall of the test facilities normally provided through the keypad of the Unit Under Test.