Swann CUBIC ASTRO 102 BX Service Manual page 173

)
<--.
AStRO 102BX, 102 BXA, and 103
+5 Volt Regulator Modification
Page 2
I
Dress the wires at the 1eft rear of the large printed circuit board
so a loop is formed towards the front. Push the large board toward
the rear of the box, now the display board should clear the front
top lip of the box (gently remove this assembly from the box, the
P!OA and PTOB L.E.D.s can bend downward to clear the box front top
IIp). Remove the +5 volt regulator with its mounting hardware
save these items. Be careful that the thermalcote compound on'the
+SV regulator does not get removed. Turning the box on its side
will help accomplish the modifications to the large printed circuit
board. Remove RlOl (4.7 ohm
sW
resistor) and replace with the
l~"
jumper wire (see figure #1). Remove the wires to the three pin
molex connecter from the large printed circuit board and install
the 5/8" jumper wire between the tioints where the red wire and the
orange wire for the molex connecter were soldered (see figure #1).
Save the molex connecter.
3. Reinstallation of frequency counter board(s)
Check for broken wires on the large board and repair if necessary.
Reinstall this board in its box by reversing the removal procedure.
Make sure the PTOA and PTOB L.E.D.s stick straight out before in-
stalling the board mounting hardware. ASTRO 103 only: Please follow
the note on the left side of figure #1 concerning lead dress for the
• wires to the aux. counter board. Check and repair any broken wires
to the feed-thru capacitors at the rear of the box. ASTRO 103 only:
Install the aux. counter board and its connecter the way they were
before removal (Reference figure #2 and #5). Set the counter box
aside.
I
4. +5V regulator terminal strip wiring:
Reference figure #3. Use the original +5V regulator and its 3 pin
molex connecter which were removed from the counter box earlier.
Drill and de burr a #4 hole through the rear panel 1" below the top
edge, between the power connecter (3158) and the EXT. speaker jack
(3155) .
5. ASTRO 102BX and I02BXA ONLY
Rewiring the set: Remove pin 2 (red or Red/Vio)
fr~m
P127 molex
connecter (mates to 3127 on left rear of distribution board) and
cut off this pin. Pull back the wire and reroute on right side
and rear of distribution board to area where the hole was drilled
in step·.IJ4. Install a new 7 5/8" red wire with clip in PI27 (for
Bin 2) and route along rear of distribution board to area where the
hole was drilled in step #4. Solder this wire to lug #1 (bottom
lug) of the new regulator terminal strip. (Reference figure #3).
Solder the other wire, previously rerouted, to lug #3 on the ter-
minal strip. Make sure there is thermalcote on the back of the
+5 volt regulator, connect the molex connecter to it, and mount it
along with theterminal strip to the rear panel (reference figure 14).