Panasonic EB-GD35 Service Manual

Also see for EB-GD35: Operating instructions Operating instructions

http://cxema.ruEB-GD35 EB-GD35C306 TEST AND MEASUREMENT6.1. IntroductionThis section provides information on testing the telephone. The layout is as follows1. 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 handheld unit.6.2. External Testing6.2.1 General InformationThe handset can be connected to a compatible personal computer for electronic adjustment and fault diagnosis. This sectionprovides 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-dept hfault finding the unit should first be disassembled, as detailed in Section 4, and then the PCB Repair Jig used to connect the P CBstogether externally as they would be found in normal use. Fault tracing can then be performed on the PCBs using suitable testequipment, 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 ToolsInterface 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 typebatteries (compatible for other products), the 5.6 V switch setting is used for PCB testing and the 4.8 V switch setting is used fortesting 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 p owervia the Interface cable.RS 232 interface. Ensures that the Unit Under Test is supplied with the correct signal levels and format.Figure 5.1: Interface Box IFB003 / IFB004Personal 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 thetest facilities normally provided through the keypad of the Unit Under Test.Power SupplyProvides 12 V DC supply to Interface box IFB003 or IFB004.INTERFACE BOXMCUKOUTPUTPHONEPOWER IGN OV 4.8V POWERINPUT 12V DCCSIB0002SERIAL NO.28550001COMPUTERFRONT REAR10016-1