Test Equipment - Shure U4D Service Manual

Test Equipment

LCD Back Light
Brightness Adjustment
25D1062 (AG)
Shure U4D Dual Diversity UHF Receiver
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
Audio analyzer
Digital multimeter
Rf signal generator
Frequency counter
Spectrum analyzer
Shure U4D receiver
*Audio levels in dBu are marked as dBm on the HP8903B.
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.
18
Model
*Hewlett-Packard 8903B
Fluke 87
HP 8656B or E440B
Hewlett-Packard 53181A
HP 8590L or E4403B
Shure U4D
Service Procedures