Shure U4D, Service Manual

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Shure U4D Dual Diversity UHF Receiver
18
25D1062 (AG)
Service Procedures
Test Equipment
Most test equipment needed is described in the Shure Wireless
Service Equipment Manual. The following test equipment (or approved
equivalent) is also needed.
Table 2
Test Equipment
Equipment Type Model
Audio analyzer *Hewlett-Packard 8903B
Digital multimeter Fluke 87
Rf signal generator HP 8656B or E440B
Frequency counter Hewlett-Packard 53181A
Spectrum analyzer HP 8590L or E4403B
Shure U4D receiver Shure U4D
*Audio levels in dBu are marked as dBm on the HP8903B.
LCD Back Light
Brightness Adjustment
Adjust R531 on the display board to achieve desired brightness
level.
This adjustment is only possible on G and later versions of the
printed circuit board.