Realisitic TRC453 Service Manual

Realistic TRC453
Documentation Project
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PLL Alignment Procedure

Refer to ALIGNMENT POINTS

Test Equipment required
a. Oscilloscope (DC - 50 MHz)
b. Frequency Counter (0 - 30 MHz)
c. DC Power Supply d. 50 ohm Load

STEP | SETTINGS | CONNECTION | ADJUST | ADJUST FOR
1 | CH: 40, AM, RX Clarifier in center | Connect scope to TP2 | L13 | Adjust for 4.5V DC reading on Oscilloscope. (Oscilloscope in DC mode)
2 | Same as step 1. CH: 1. | Connect scope to TP2 |  | Check that the voltage is more than 2V DC on Oscilloscope.
3 | Same as step 1. CH:19 USB, RX | Connect scope to TP3 | L14 | Adjust for maximum reading on Oscilloscope.
4 | Same as step 3. | Connect Frequency counter to TP3 | L16 | Adjust for 16.4925 MHz ±20 Hz.
5 | Same as step 1. CH: 19 AM, RX | Same as step 4. | L15 | Adjust for 16.4900 MHz ±20 Hz.
6. | Same as step 1 CH: 19 LSB, RX. | Same as step 5. | L17 | Adjust for 16.4875 MHz ±20 Hz.
7. | Same as step 1 CH: 19 LSB, TX | Same as step 6. | VR3 | Adjust fur 16.4875 MHz ±20 Hz.
8. | Same as step 1. CH: 19 LSB, RX | Connect Frequency counterTP5 | L20 | Adjust for 10.6925 MHz ±20 Hz.
9. | Same as step 1 CH: 19 USB, RX | Same as step 8 | L19 | Adjust for 10.6975 MHz ±20 Hz.
10. | Same as step 1. CH: 19, TX, AM. Disconnect TP6, TP7, TP8 | Connect Frequency counter TP9 | L18 | Adjust for 10.6950 MHz ±5 Hz.

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