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Modifiche - Forumradioamatori.it non รจ in alcun modo responsabile di eventuali danni subiti, se non sei sicuro di quello che fai lascia perdere e basta!!! => KENWOOD => Discussione aperta da: RADIOMOD il Lun 07 Gennaio, 14:45 2013
KENWOOD TH-28A
Expanded RF
1- Disconnect the battery and antenna.
2- Remove 4 back case screws and open the radio.
NOTE: There are 2 versions of this radio. The later version have 2 green
jumpers wires.
CUT W2 jumper only and go to step 8 below
3- Locate and unsolder the two solder tack point on the shield.
( Not required in later version ).
4- Remove 2 screws holding the shield.
5- Locate chip diode positions D8... D15. [ part # MA110 or 1SS355 ].
6- Remove diode D8, D10, D15, [ save the diodes ].
7- Install diode D11 and D14. ( Use diodes removed in the previous step ).
8- Reassemble the radio.
9 Reset the microprocessor. [ Press and hold [ M ] and turn power on ].
ATTENTION - W1 and W2 only on letter version.
ALIGNMENT POINTS
VR-1 CTCSS adjustment ------- VR-4 S-Meter
VR-4 High/Low power ------- VR-5 Mid power
VR-7 DTMF deviation Adj. ------- VR-8 Modulation Adj.