SERVICE MANUAL CHANGE NOTICE

Shure T2 Vocal Artist Microphone Transmitter
2. Tack-solder the cable to side 1 of the RF circuit board as follows:
Center conductor to the 50 Ω solder pad, I210
Shielding to I2GN (on older versions, IGND)
ETSI-Approved Units
1. Obtain a 50 Ω coaxial test cable for connecting the circuit boards
to various test equipment. (To construct this cable, see “50 Ω
Test Cable Assembly” in the Wireless Service Equipment manual.)
2. Tack-solder the cable to the bottom of the RF circuit board as follows:
Center conductor to the 50 Ω solder pad, TP6
Shielding to TP7 (ground)
High-Impedance Probe for TP5: When measuring test point 5,
fashion a high-impedance probe on the end of the test cable by connecting
a 50 Ω resistor between the center conductor and the shield, and a
0.5 pF capacitor to the end of the center conductor (see the following
illustration).
0.5 pF
shield
50 Ω
ÌÌ
Figure 4.
High-Impedance Probe for ETSI-Approved Models
All Units
3. Carefully remove C240 (domestic units) or C242 (ETSI units) from
the RF board.
Note: This disconnects the battery antenna to allow accurate
conductive-power measurements.
Display Checks
1. Connect the 9 Vdc power supply to the audio board: the positive
lead to I140 (the positive battery terminal), and the negative lead
to I145 (ground).
2. Slide S101 (Power) to “On” (toward the board number), and
S102 (Mic) to “Off” (away from S101): the green LED should
glow. If it doesn’t, there is a circuit malfunction.
3. Reduce the power-supply voltage to 6 Vdc: the red LED should
glow.
4. Return the power supply voltage to 9 Vdc.
25C1018 (CC)
15 Service Procedures