CID
-..J,...'TAR TECH J OURNAL
september 1994
MARS VFM-4
KEEPING THE WORK HORSE WORKING
Mike Smith
Joytime Amusement Co.
Greenville, Soutb Carolina
SUBJECT
After operating bill validators
now for approximately eight
years in the video pokers and
amusement industry, we have
seen and tried every acceptor on
the market.
TOP ACCEPTOR
The Mars VFM-4 has proven to
be very reliable and secure unit.
When the other units are on the
bench for repair, the VFM-4 will
still be out earning revenue, if you
will take a little time to keep them
running. By the time the VFM-4
hits the bench, it has probably run
the belts down to threads so it's
time to take the unit down any
way-so lets do it right now and it
will be a long time before you see
this unit again.
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cotton SW ab.
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it 2. Whenever you replace the tim-
f:
rn NOTE 1
!I:; ing belts always replace all four ; 1 1; Proms can be identified by pull-
[!! belts ( or two depending on which I~ ing back the MEI part number
~[; models you have) and replace the II label. CM OS Proms will have the
Ill pinch roller assembly (#91-16- Ill following identification:
~!! 202-4) also.
m
---~
i~
!:I
I 27c32. I
[\i 3. Now inspect the sensor hous- ;::;
~ --~
ings; if scratched or damaged, re- \Ill Depending on manufacture, non-
• ~I ti i place
it (part #07-14-063); it &'.! CMOS Proms could have one of
!;; seems some people think they !,!:; the following identifications:
m can dislodge a jammed bill with !/:l
2732
REHAB PROCEDURE
_ 1!:i a good sharp pocket knife and not m
trx,,--; __ ,.)_,._,._~ ... x,,~,::::, __ ,,,..;:;,~,&":..:.:«\'.:@,.::.'..,u,-i,'..,~,:::. .. w: .... ,,,~❖-"'"·''"'"·""·"" cause damage to the sensor hous- d
2732a
2732b
1111 1. After totally disassembling the
ings. Just remember that a good Iii!
!II unit, hot soapy water and a tooth smooth bill path will save you a rn
Ill brush will do wonders on the ny- lot of future service calls for ;::; NoTE 2
i:::! lon rollers and gears.
jammed bills.
j;!: Be sure to always solder the
ii::l
i:l piggy-back processor in -the pro-
11® la. Then inspect the motor and
4. After completing the assembly, ~il cessor very seldom fails and re-
t\l gear box assembly for wear, if any it's time to tune up the CPU. For i i moval of the dip socket elimi-
~:! replace with #91-10-309-4; always all units with piggyback micro- ~il nates intermittent problems.
&j fill gear box with lubricant. Fishes processors; there are major dif- ft
fl ~:: ~ Brothers Refining Co. makes a f erences in the consumption of 1:1 ~t REMEMBER
U good product that's been around current between a regular Prom f) Follow these tips and you won't
!1 1
:; a long time called Lubri-plate.
and a CMOS Prom. It is impor- !::; see this unit back on the bench
IM~.~mUfthffl=W--f~?v--rn-✓-~l~PZh?~ ✓Ww.XITV?Y
{:i
tant to install only CMOS Proms :J
in VMF-4 control boards. Instal- J
lation of non CMOS Proms may !J/I;
cause the +5Vdc regulator to cut !J
out -resulting in no bills being [!
accepted and a power reset be- III
ing necessary to clear the failure I:
mode.
,t
[ lb. Now clean roller shafts with
i:lj good old WD-40. I usually clean
1 l! all the metal and plastic parts
m:: with WD-40. It not only lubri-
M cates, it also leaves a protective
!:I coating. Now clean the credit le-
II ver sensor, bill entry sensors and
1/::: magnetic head with alcohol and
l.·1,_::::;,_11,:
❖-.-.:-.,,\ .. ..
.
n.
¼~+1.AM¼«~•-·'
for a longtime.