WFM90D and WFM91D ServiceManual 6-39
Troubleshooting Procedures
This section containsthe following information to help you locate problems
within the WFM90D or WFM91D:
HList of equipment requiredto perform the procedures
HBattery-faultanalysis
HLow-voltage powersupply
HFault symptom table
HTroubleshootingflowcharts
HConnector pin locator diagram
Equipment Required
The following equipment and accessory itemsare required to perform the
TroubleshootingProcedures. Minimum requirement specifications are followed
by an example of equipment that meetthese specifications.
Table6- 3: Equipment required for troubleshooting
Equipment description Minimum requirements Equipment example
Televisiontest signal generator 75% colorbar and 100% flat fi eld test signals for
the television standard of the monitor to be
tested
NTSC: TektronixTSG100;
PAL:Tektronix TSG111
Audio generator Amplitude Range: --10dBu to 8 dBu;
Frequency:1 kHz t o 50 kHz
TektronixASG100 Audio Signal Generator
Oscilloscope 100MHz Tektronix1465B
Picture monitor Composite video for the television standard of
themonitortobetested
75Ωcoaxi al cable Twocables required, male-to-male BNC
connectors
Tektronixpart number 012-0159-00 (42-inch)
Circuit board vise
Testresistor Two 30 Ω,3W Tektronixpart number 308-0142-00
Testresistor 10kΩ,2W Tektronix part number 305-0103-00
Jumperwi res Three,8 i nch 20AWG
12V powersupply TektronixPS282