LesComm

 

8719-192-L-PLCC ***V2*** KIT INSTRUCTIONS

 

 

Figure 1

NOTE: RADIO MUST BE IN ORIGINAL CHANNEL CONFIGURATION. ALL CHANNEL MODS MUST BE REMOVED AND COMPONENTS RETURNED TO ORIGINAL CONDITION.

 

Presteps;

 

DX959, 949, 939, 2547, Ranger 69X, 96X, Freedom-1, Replace X3 with the 14.730 xtal.

 

Figure 2

 

 

RA1 has already been installed the correct way.

RA1’s common pin is denoted by a dot above the pin.

 

 

EPT069610Z,. If your PLL IC is labeled like the one in this pic “RCI 8719-97”. Do not replace X3. Instead, leave the original crystal in place and connect A14 to +5 volts. See Figure 1.

If your radio has the PLL IC labeled “RCI 8719-99” replace X3 with the 14.730 xtal.

In both cases, install RA1 common pin to ground hole (pull down).

 

 

 

 

 

 

 

 

 

 

 

1. Remove the top and bottom covers.

 

2. Unplug the multi colored cable, that comes from the channel selector board, at the main board. Refer to Figure 6.

 

 

Figure 6.

 

3. Plug the loose end into J1 of the LesComm board.

 

4. Connect the cable from J3 of the LesComm board to the connector on the main board you just unplugged the channel selector from, J33. See figure 2.

 

5. Unplug the ANL/NB connector from the radio board and plug it into the V2 board.

 

 

 

 

 

 

 

5a. Find a suitable place to install the 10kc switch.

 

6. Mount the LesComm board.

 

7. Connect to power and power up the radio. STOP. Check for full coverage. If full coverage is present, you’re done. Replace covers. If not, proceed to step 8.

 

 

 

8. Place the NB/ANL (Band) switch in the HI  channels position, channel selector on channel 1.

 

9. Check for the frequency of  27.415mhz. If not present, using a digital voltmeter, measure the voltage on pin 17 of the 8719 PLL chip. (Should be approximately 4 volts.)

 

10. Connect the voltmeter to test point 1 (Cathode of D1) on the LesComm board.

 

11. Adjust VR1 to match the voltage you measured on pin 17 of the PLL, minus .3volts.

Example; If you measured 4.65 volts on pin 17, set VR1 for 4.35 volts at TP 1.

Note: If using an MMB8719, set voltage .75 volts below pin 17.

 

12. Check for the frequency of  27.415mhz.

 

13. Switch to channel 1. Select LO Band.

 

14. Check for the frequency of  26.515mhz.

 

 

Reassemble your radio.

 

Enjoy!