QRP PROJECT Blue Cool Radio, Manual, Page: 4 / 45

Rev: November 20 2006
4
Group 2 Controller Section
This section we call the digital heart of our BCR. All functions of the radio
are controlled by the Common PIC Controller. If the controller is in
function, it gives you some internal tools as an advantage: The controler
side tone enables testing the AF part, and the Controllers RF part gives us a
complete signal Generator to
test the IF section later on.
[ ] R63 not used with green
display
[ ] R54 220R 1Watt
D-1
[ ] D15 1N4148 C-1
[ ] R56 1K C-1
[ ] R55 2M2 C/D-1
[ ] R62 6,8K C/D-1
[ ] R61 3,3K C/D-2
[ ] R59 1K C-1/2
[ ] R57 2,7K C-2
[ ] R58 4,7K C-2
[ ] R60 22k C-2
[ ] C86 10nF (103) C-2
[ ] C77 10nF (103) C-2
[ ] Q5 4,0MHz Resonator C-1/2
[ ] C84 1,5
u F C/D-2
(This one must be installed
lying, with legs bent down by
90 degrees, otherwise you will have trouble with the display later on.
[ ] C83 1,5
u F 63V Folie Also Lying D-1/2
[ ] C85 10nF (103) B-2
[ ] C80 1000pF(102) B-2
[ ] C79 1000pF (102) B-2
[ ] C78 1000pF (102) B-2
[ ] R52 100R A-2
[ ] C76 1000pF (102) B-2
[ ] C81 100nF (104) B-1/2
[ ] R53 100R A/B-1/2
[X] C82 100nF SMD 0805 Bottom
[ ] Bu1 3,5mmStereo Jack A-1/2
The following trimmer
potentiometer must be placed
at the bottom side of the PCB
[ ] P7 5K PIHER PT6 A/B-1
Now solder the socket for the PIC
and the socket for the display.
Carefully think what you are
doing, before you solder them,
especially the big PIC socket is
the hell to desolder if it is wrong.
Look at the PIC socket (PLCC
socket). One of its 4 corners
shows a 45 dgree angle. This corner must be placed into the lower left
corner as can be seen in the picture below. Place the socket on the part side
of the PCB. Again compare the 45 degree corner with the drawing. All pins
must find there way into their holes easily without forcing the socket . If it
is at its place, hold it with your fingers and control at the solder side if all
pins found their way
through the PCB. If this is
ok, firmly press the socket
against the PCB and solder
two pins at diagonal
corners. Recheck if the
socket is placed absolutely
flat on the PCB. If not,
resolder the 2 pinst while
pressing the socket down.
If it is ok, solder carefully
all remaining pins.
Use bright light and a
magnifier to controll if all
pins are soldered properly.
[ ] IC4 Socket PLCC44 B/C-
1/2