WARNING
WARNING
Service
Troubleshooting
Troubleshooting
Refer to Chapter 1, “Introduction and Installation,” to make sure the test set is connected properly to the analyzer and that the analyzer has been configured for use with the multiport test set.
Troubleshooting consists of isolating the cause of any problem to an individual assembly. The multiport test set has three main assemblies:
•power supply
•LED display board
•main switch board assembly
Line voltage may be present on exposed metal
The Power Supply
For continued protection against fire hazard, replace fuse only with same type and ratings (H 3.15 A, 250 VAC). The use of other fuses or materials is prohibited.
The line fuse is located on the power supply assembly. See the parts list (later in this chapter) for the fuse part number. The power supply is autoranging and will accept from 90 to 254 volts AC. The power supply provides ±15 volts and +5 volts to the main board assembly via a four wire cable assembly. The
Pin # | Voltage | Wire Color | LED | |
Ref. Designator | ||||
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1 | +15 volts | brown | DS701 | |
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3 | +5 volts | orange | DS700 | |
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4 | ground | yellow | N/A | |
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6 | −15 volts | blue | DS702 | |
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136 | Chapter 9 |
