Agilent Technologies E1364A service manual Testing the Assembly

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