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WFM90D and WFM91D Service Manual
6-39
Troubleshooting Procedures
This section contains the following information to help you locate problems
within the WFM90D or WFM91D:
H List of equipment required to perform the procedures
H Battery-fault analysis
H Low-voltage power supply
H Fault symptom table
H Troubleshooting flowcharts
H Connector pin locator diagram
Equipment Required
The following equipment and accessory items are required to perform the
Troubleshooting Procedures. Minimum requirement specifications are followed
by an example of equipment that meet these specifications.
Table 6- 3: Equipment required for troubleshooting
Equipment description Minimum requirements Equipment example
Television test signal generator 75% color bar and 100% flat field test signals for
the television standard of the monitor to be
tested
NTSC: Tektronix TSG100;
PAL: Tektronix TSG111
Audio generator Amplitude Range: --10 dBu to 8 dBu;
Frequency: 1 kHz to 50 kHz
Tektronix ASG100 Audio Signal Generator
Oscilloscope 100 MHz Tektronix 1465B
Picture monitor Composite video for the television standard of
themonitortobetested
75 Ω coaxial cable Two cables required, male-to-male BNC
connectors
Tektronix part number 012-0159-00 (42-inch)
Circuit board vi s e
Test resistor Two 30 Ω,3W Tektronix part number 308-0142-00
Test resistor 10 kΩ,2W Tektronix part number 305-0103-00
Jumper wires Three, 8 inch 20 AWG
12 V power supply Tektronix PS282