Tektronix TDS 420A Service Manual

Troubleshooting
TDS 420A, TDS 430A & TDS 460A Service Manual
6- 101
Figure 6- 51: I2C Isolation Troubleshooting Procedure
Power off the oscilloscope and
replace the A03 CPU board.
Power on the oscilloscope.
The A01 Backplane was
bad.
Power off the oscilloscope. Disconnect the
cable to connector J101 on the
A05 Attenuator board. Power on the
oscilloscope.
No
Yes
Repeat the procedure or contact your local
Tektronix service center.
Use this procedure to
isolate problems on the
I2C bus.
Power off the oscilloscope. Using
the Front Cover, Rear Cover, Cabinet, Rear
EMI Gasket, and Cabinet Handle and Feet
disassembly procedure, rem ove the cabinet.
Using the Console Port Set Up proc edure,
connect the console-port cable to the
oscilloscope and to your personal computer.
Does the
oscilloscope power
up normally?
Replace J101, the
Attenuator/Backplane cable, or
the A05 Attenuator module.
Does the
oscilloscope power
up normally?
Power off the oscilloscope. Reconnect the
cable to connector J101 on the
A05 Attenuator board. Remove the
connector to J7 on the A05 At tenuator
board. Power up the oscilloscope.
Replace J7, the
Acquisition/Backplane cable,
or the A04 Ac quisition
module?
Does the
oscilloscope power
up normally?
Power off the oscilloscope. Replace
the A01 Backplane module. Power
on the scope.
Yes
No
No
Yes
The A03 CPU board was
bad.
Does the
oscilloscope power
up normally?
No
Yes

Tektronix TDS 420A Specifications

General

Brand	Tektronix
Model	TDS 420A
Category	Test Equipment
Language	English