Agilent Technologies E1364A service manual Testing the Assembly

Page 45

Testing the Assembly

You can use the tests and checks in Table 4-2 to isolate the problem. See Figure 3-1 in Chapter 3 or Figure B-1 in Appendix B for locations of replaceable parts, depending on the serial number of your switch module.

Table 4-2. E1364A Tests/Checks

Test/Check	Reference Designator	Check:

Heat Damage	- - - - - - - - - -	Discolored PC boards
		Damaged insulation
		Evidence of arcing

Switch/Jumper	JM13, JM14, ..., JM26	IRQ Level setting
Settings	SP1	LADDR setting

Switch PCA	F1, F2	Fuse continuity
	P1, J1	Connector contacts
	K100, K101, ..., K115	Relay contact resistance

Checking for Heat Damage

Inspect the switch for signs of abnormal internally generated heat such as discolored printed circuit boards or components, damaged insulation, or evidence of arcing. If there is damage, do not operate the switch until you have corrected the problem.

Checking Switches/Jumpers

Verify that the logical address setting is set correctly (factory set at 120). Verify that the interrupt priority jumpers are set correctly (factory set at level 1). See the E1364A User’s Manual for information.

Checking the Switch PCA

Use the replaceable parts locator (Figure 3-1 or B-1, depending on the serial number of your switch module) to check the following:

•Verify that fuses F1 and F2 are good.

•Check the closed-channel resistance of all relays using the procedure in Chapter 2. Replace any bad relays.

•Check connectors P1 and J1 for damage.

NOTE If the preceding steps fail to isolate the problem, use the schematics included with this manual to perform component-level troubleshooting.

Chapter 4

Service 45

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Contents Serial Numbers Agilent E1364A Channel Form C Switch ModulePage Contents Appendix B. Backdating Information Limitation Of Warranty WarrantyCertification Exclusive RemediesDocumentation History Safety SymbolsManufacturer’s Address Manufacturer’s NameDeclares, that the product Product Name Model NumberPage Page Page Introduction Agilent E1364A Form C Switch ModuleGeneral Information Chapter Safety ConsiderationsChapter General Information Initial Incoming Inspection Guidelines Inspection/ShippingPackaging/Shipping Guidelines Switch Description Temperature HumidityEnvironment Requirements Recommended Model Use Recommended Test EquipmentGeneral Information Chapter Verification Tests Operation Verification Functional VerificationPerformance Verification 1a. Agilent E1364A Test Fixture Schematic1b. Agilent E1364A Test Fixture Test 2-1 Closed-Channel Resistance Test Normally Closed Resistance Test Next 530 540 END Test 2-2 DC Isolation Test Normally Closed to Chassis 1. Hardware Connections DC Isolation Test NC Channels to Chassis Example DC Isolation Test Verification Tests Chapter Test Accuracy Ratio TAR Performance Test RecordPerformance Test Record for the E1364A Switch Module Page 1 Performance Test Record for the E1364A Switch Module Page 2 Maximum Uncert Test Measured Description MinimumTest Measured Description Minimum Reading Maximum Uncert Performance Test Record for the E1364A Switch Module Page 4Verification Tests Chapter Replaceable Parts Lists Part Qty Part DescriptionNumber Replaceable Parts Chapter E1364A Terminal Block Replaceable Parts Replaceable Parts Chapter Service Identifying the Problem Troubleshooting TechniquesE1364A Tests/Checks Test/Check Reference Designator Testing the AssemblyESD Precautions Repair and Maintenance GuidelinesFunctional Verification Test Verification Tests C ProgramsExample Closed Channel Resistance Test Performance Verification TestsClose instrument session Example DC Isolation Test Iclose dm Example C Programs Appendix a Reference Part Qty Part Description Designator Number Replaceable Parts ListQty Part Description Part NumberAgilent E1364A Reference Designators Figure B-1. E1364A Component Assembly Parts Figure B-2. E1364A Terminal Module Replaceable Parts Page Page Copyright Agilent Technologies, Inc