2.
Checking the PC L ink (Fuse)
A visual check of the PC link on the foil side
of the P.C. board should indicate whether it
i:::; open or not.
3.
Adding a New PC Link (Figure
6-6
&
6-7)
The new PC link will be soldered in place on
the component side of the printed circuit
board. You will need the following:
A 40 watt (max) soldering iron
1 #90279 1 PC Link (Fuse)
Rosin Core solder
2-1 /2" pieces of 24 gage buss wire
Solder one end of each of the buss wires
into the holes provided on the component
side of the printed circuit board.
Insert the extended buss wire leads through
the holes in the PC link. Slide the link down
until flat on the board and solder in place.
Clip off any excess lead.
Care Must be exercised, and good soldering
techniques used, in the replacing of the PC
Link
Excessive heat or poor
workmanship can easily damage foil and
components on a printed circuit board . . .
H.
SERVICING AIDS
Several servicing aids are available from Coinco
1.
Coin Changer Tester/Test Stand
Coinco Part
#405326
The coin changer is an intregal part of th
e
vending machine and certain functions by
the coin changer are directly related to the
operation of the vendor.
To simulate these functions when the
changer is removed from the vendor, Coinco
has made available a coin changer tester.
Also available is a coin changer test stand
which holds the coin changer and tester
during testing. It has separate areas for the
coin return and cash box outlets of the
changer.
2.
Volt-Ohm Meter - Coinco Part # 902462
Coinco has also available a volt-ohm meter
for the purpose of taking voltage and
resistance readings throughout the
changer.
If you decide to service the logic board
yourself, other servicing aids are available.
3 . Logic Probe - Coinco Part #404056
In some areas of trouble shooting the logic
board with Coinco Publication #902868 it
calls out the use of a logic probe. This is an
electronic device used to detect voltage
changes that are faster than the reaction
time of a volt-ohm meter.
15
=
=
=
=
=
=
=
=
=
=
.�I
Figure 6-6
S75-9800A
Figure 6-7
D
0
575-98008
4. Test Probe - Coinco Part# 404057
The test probe is used to force some test
points on the logic board to a high or low
voltage state to check certain areas of the
electronic circuit.
5. 575-98008/C
Logic
Board Tester
-
P/N 404984
The S75-S800B/C Logic Board Tester provides instant
testing of all components on the logic board. Its digital
readout will display if the logic board is good or display
the faulty component if the logic board is defective.
