Tektronix 070-A830-51 manual 213

Removal and Installation Procedures

				Is
Use this procedure to				the PRINCIPAL		No
							Turn on the PRINCIPAL
troubleshoot the power				POWER SWITCH in the
							POWER SWITCH.
supply module.				ON position?
					Yes
							Does
Is
		No	Turn off the PRINCIPAL POWER						Yes
line fuse			SWITCH. Replace the fuse. Turn				the fuse blow
ok?			on the principal power switch.				again?
	Yes							No

Turn off the PRINCIPAL POWER SWITCH and remove the cover using the Cabinet removal procedure. Check all the

cables coming out of the power supply module and the cabling between modules. Be sure every cable is attached securely.

Turn off the PRINCIPAL POWER

SWITCH. Remove the generator cabinet

using the cabinet removal procedure. No Check the cables from the A11

Connector board. Disconnect the cables at J1 and J2 on the power supply module.

Press the ON/STBY button. Check these power supply voltages on J3 on the A10 Connector board:

+5 V"3%, -5 V"5%, +12 V"5%. Check these power supply voltages on J2 on the power supply module:

-2 V"20%, -8 V"20%, +8 V"20% (see Figure 6-27 for the power supply connector pin assignment).

Turn on

the PRINCIPAL POWER

SWITCH. Can you hear			No
the tick of relay actuator
in the power supply
module?
	Yes				Are the
					voltages on the
Press		Yes			A11 Connector board		No
the ON/STBY button.				TP030 : +5 V, TP010 : +12 V
Does the generator				TP030 : -5 V (see Figure 6-30
power on?					on page 6-57)?
						Yes
					Fix the power problem.

Are	No
the voltages
ok?

Yes

The power supply module is ok.

Perform isolation troubleshooting for the modules on the bottom of the generator.

Replace the power supply module (page 6-34).

Figure 6-26: Troubleshooting procedure 1 , Power Supply module

AWG710 Service Manual 6-53