Uniden
PRO520E (UT-317A)
Documentation Project
CBTricks.com
ALIGIMENT OF PLL PORTION
Test Equipment Required
a. |
Oscilloscope (0-50MHz) |
b. |
DC Power Supply (13.8V) |
c. |
DC Voltmeter (by maximum, 100K ohm/V) |
Alignment Procedure
STEP |
PRESET TO |
ADJUSTMENT |
REMARKS |
1 |
TX
Mode |
L702 |
Connect
DC Voltmeter to TP1 (Lead of R77). |
2 |
RX
Mode |
L701 |
Sane as step 1. |
* Note MIC Signal Line of Dummy MIC requires electrolytic condenser due to MIC Jack J502's No. 1 pin added DC Voltage.
TEST EQUIPMENT CONNECTION
ALIGNMENT OF RECEIVER PORTION
Test Equipment Required
a. |
RF
Signal Generator (27 MHz Band, 1000 Hz, |
b. |
AF VTVM |
c. |
Oscilloscope (0 50MHz) |
d. |
Dummy Load (8 ohm, 5 watts, resistive (General Output Power)) |
e. |
DC Power Supply (13.8 V) |
f. |
DC Voltmeter |
Alignment Procedure
STEP |
PRESET TO |
ADJUSIMENT |
REMARKS |
1 |
RX
Mode |
L1,
L2, |
Connect RF SSG to ANT Connector (J501) and set it 27.185MHz. Connect AF VTVM to EXT. SPK. Jack (J3). Adjust coils for maximum reading on AF VTVM. |
2 |
Same as above. |
VR4 |
Set the SSG Attenuator to 0.25uV and adjust the output power to normal position. If the output power is less than normal, keep resistance value of VR4 at minimum (CW) and keep it at maximum (CCW) if over normal to the contrary. |
3 |
Same
as Step 1 except |
VR1 |
Set the RF Signal Generator to 1000uV output level. Adjust VR1 for 2V on AF VTVM. |
4 |
Same
as step 1 |
VR3 |
Set the RF Signal Generator to 1000uV output level. Adjust VR3 so that 4th digit of LED meter of the unit just illuminates. |
TEST EQUIPMENT CONNECTION
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.