BACKUP UPDATE FOR THE PRESIDENT LINCOLN AND THE UNIDEN
In the first instance is intended for this modification sets in which the processor chip switch is used, but can be, of course, also carried out in a standard type.
Much use is not. However, With the Chip Switch can stand next to a large number of memory channels also several other settings at your disposal.
Here, the back-up system allows for storage of various data in programmed.
Is there now for about one month or not worked with the transmitter / receiver longer go though all you've programmed in the memory data is lost and you must enter it again.
To prevent this, it is sufficient simply by the replacement of an electrolytic capacitor of a type having a higher capacitance value.
The memory then remains when not in use, about 6 to 7 months intact.
All you need is there for a standing subminiature capacitor with a value of 2200 MF and 6.3 volts a slightly higher voltage may also Class A.
In itself, it is a simple procedure, but caution is advised.
Thus, you must first disconnect the power supply voltage and remove the on and off button to turn on any residual voltage.
In order to be able to carry out the modification, the processor board of the transmitter receiver is to be removed.
Here we are going to proceed as follows. Remove the connectors from the slots any brands to avoid, then the two coax cables. Faulty reconnection
Then tighten the screws 2 to the left as far apart from the chassis portion to be the same correspond to the portion in which the processor board is housed.
After this, remove the four screws on the processor board which can then be removed from the transmitter / receiver.
As with placement of the Chip Switch should be. Discharge the capacitor to remove
You hereby submit for 30 sec flat hand at the height of the microprocessor, however, on the solder.
Then search on C393.
On it is a declared value of 1000 uF 3.6 Volts, and is located opposite the microprocessor.
Remove C393 with some suction wick or the soldeerunit.
Please note that the print on these points by metallized.
You solder the new capacitor is now the site of the old taking care that the + and - of the capacitors are connected correctly.
Should the new capacitors are too high for an upright mounting, it can of course also be placed horizontally.
In that case you have to glue them. Print
For resetting the processor board and the connectors in reverse order as when dismantling.
SOURCE: CB RADIO
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