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Step 2. Check the serial clock (SCL).
•
Attach a logic probe to A7 P7 pin 2 (SCL).
•
Set the power switch to on ( l ).
•
Press SW2 (reset switch) while monitoring A7 P7 pin 2 (SCL), the power-on
LEDs, and the display.
The TTL logic level should toggle when 00 is displayed and toggle continuously
when
Booting System is displayed. The following failure message should be
displayed after
Booting System and the display grid should appear about 2 minutes
after power up.
Front Panel failure information:
keyboard IIC chip fails:
IIC: No Device Acknowledge
key stuck: 32
A power-on test has failed. Refer
servicing to qualified personnel.
Press Start key to attempt to continue
power-up.
Troubleshooting the Analyzer Agilent 35670A
To troubleshoot IIC bus failures
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