Parts Designations - Shure U4D Service Manual

Replacement Parts and Drawings
U4D Model Variations

Parts Designations

Replacement Parts and Drawings
Shure U4D Dual Diversity UHF Receiver
Different frequency versions of the U4D receiver are currently available
for use in various countries. Each version is identified in the table below by
country code, frequency range, and printed circuit board version.
COUNTRY FREQUENCY
CODE RANGE
UA 782–806 MHz
UB 692–716 MHz
MA 782–810 MHz
MB 800–830 MHz
M3 692–716 MHz
R7 782–810 MHz
R2 800–830 MHz
MC 774–782 MHz
R3 774–782 MHz
MD To create an MD board, order the 90MB8902 PCB and install the
II 806–810 MHz
JB 806–810 MHz
KK 854–862 MHz
R6 800–820 MHz
S2 838–862 MHz
Note: The PC board number is a family panel part number which
includes the main PCB and the front panel digital PCB.
The following comments apply to the parts list and the schematic:
Resistors: Unless otherwise noted, all resistors are surface-mount
1
with / rating and 1% tolerance.
W
10
Capacitors: Unless otherwise noted, non-polarized capacitors are
surface-mount dielectric types with a 100
NPO
tolerance, and polarized capacitors are tantalum types.
35
Table 3
U4D Model Variations
COUNTRY
DESIGNATION
U.S.A. and Canada
U.S.A.
Germany
Europe
Europe
Europe
Europe
Netherlands
Netherlands
MD EEPROM (188R131MD).
Japan
Japan
United Kingdom
Scandanavia
England
RF-AUDIO
PC BOARD
NUMBER
90UA8902
90UB8902
90MA8902
90MB8902
90M38902
90R78902
90R28902
90MC8902
90R38902
90II8902
90JB8902
90KK8902
90R68902
90S28902
capacity and a 5%
V
25D1062 (AG)