Star Tech Journal

Issue: 1991-April - Vol 13 Issue 2

CRT Alignnient
This month, I'd like to say afew words on CRT
alignment Have you ever replaced a CRT only to
frnd rainbows on screen? Tried degaussing with
no help? Ok, let's go over it again.
* After replacing the CRf, align the yoke back on
the neck roughly where it was on the old CRf.
Snag the clamp just enough to hold it.
* If the game has an internal convergence gen-
erator, then power down, disconnect the +5v
jumper, reconnect the RGB lines and use it to
converge and purify the screen. If not, and no
pattern generator is handy, try this.
* With the +5 jumper in place (RGB lines dis-
* Install the magnets in the same approximate
connected. Sync must be connected!), shrink
the picture both horizontally and vertically to get
a small square block.
* NOW, disconnect the RGB lines from the logic
* Connect additional jumpers from +5v to B&G
place on the new CRf that were in the old one
(roughly just ahead of the guns).
board and install a jumper from +5v to the red
monitor input. Leave the sync connected. Power
it up. This will give you a red screen (on most
monitors - some AC coupled monitors this won't
work, and it's back to the shop for the pattern
generator). Gently loosen the yoke clamp and
move the yoke back and forth on the neck to give
a full solid color screen without rainbows. Also,
level the screen with the tube outline.
*Snug the clamp. Degauss theCRfatthis point
and then double check your yoke setting - pic-
ture square and mono colored? Fine. Go ahead
and glue in the rubber yoke wedges.
inputs. The square should now be white, on a
black background. Align the convergence to a
single white square. No R, G, or B "shadow lines"
on the edges. Enlarge the picture horizontally
noting any minor corrections and then verti-
cally.
*
Power down, disconnect jumpers and
reconnect RGB lines. Put up the game and check
it out.
I've been told this method was kind of crude. I ~
is, I admit it, but it has worked for me.
Happy gaming.
~
Wurlitzer CD Juke
Disc/Arm.
Service Dept.
Drew's Inc.
Spartanburg, South Carolina
PROBLEM
Wurlitzer compact disc jukes centering disc life.
SOLUTION
Wurlitzer has available now an Updated Cen-
tering Disc/ Ann Assembly that replaces the old
units entirely. The new unit has an adjustment
screw that limits downward travel and a mag-
netic centering disc that has no bearing point
like before.
ORDER
Part number 003524 7.
William.s Hit The
Ice Harness Error
Del Jones
Bar-Del Amusements
West Chester, Pennsylvania
PROBLEM
On the Williams Hit the Ice two player conversion
kit. the wiring instructions are wrong for the
main E JAMMA connector harness.
JOHN FLUKE MFG. TEST EQUIPMENT
Fl.ux:E 73: Low cost, rugged, dependabe quality mul-
timeter. Features unique analog/digital display. Of-
fers basic de accuracy of 0. 7%, the speed & conve-
nience of instant autoranging, &a l0Acurrentrange.
Three year warranty. $83 ($8).
Fl.ux:E 75: Incorporates all the features of the Fluke 73
plus 0.5% basic de accuracy, autorangingwith range
hold, a lOAand autoranged mAranges, and a beeper.
Three year warranty. $123 ($8).
Fl.ux:E 77: Has all the features of the Fluke 75 rugged
design with the ingenious ''Touch Hold" function
(locks the reading while you concentrate on the test
points), basic de accuracy to 0.3% and a custom
multipurpose holster. Three year warranty. $162 ($8).
Fl.ux:E 83: Fast 3-3/4 digit, 4000 count digital dis-
play. Dependable multimeter. Features an analog
bargraph with unique zoom mode for higher resolu-
tion. Measures frequencies from 0.5Hz to 200KHz.
Capacitance from lOpf to 5uf. 3 yr warranty. $211 (8).
Fl.UKE 85: All features of the FL83 but offers higher
accuracy and AC frequency response. $250 (8).
Fl.ux:E 87: All the features of the 85, plus a backlit
display, 4-1/2 digit mode, 1 ms Peak Min Max hold
and true RMS measurements. $294 (8).
Fl.ux:E 37: Bench/Portable Multimeter. 3200 count
digital display, 31-segment analog bar graph. Fast
autoranging and ''Touch Hold" functions. Built-in
storage compartment for test leads. 0.1 % basic de
accuracy. Audible continuity/ diode test. Front panel
slopes 15 degrees permitting easyviewing. $264 ($12).
.'l'o. Ord~r:• J)t'epa1a O~•·tj()D. §ltippirlgand • lrt;urahce···costs
•am•listed.atl:~tit~Itl<:(l$H.Ne~p-~r~Y restd.erits~dd•7'¾>sale1J
ta:t. '.f'9~igri 9:r ...
·····•··-·
CAUSE
Toe one player Pass/Save button Pin 22 and
Shoot/ Check Pin 23 should be reversed as
should player two Pass/Save Pin Z and Shoot/
Check Pin A be reversed.
NoTE
Toe kit came with no JAMMA harness so a re-
~lacement may be necessary. You might want to
check closely the same wire orientation for the
three and four player version. If you are too far
into the kit installation, just reverse the button
decals for the one & two players on control panel.
.... ..... ................ __
diil¢9t1r>J¢clfo.-Ui¢ Q<>i11-Qp l11dustry.: §!eridC)r(lers to: l'O
Bq,(JQE}f?, M~~11m,,tvllle. N,J.0~109. J?ll: §09/§62-1oso.
I



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~------------------~
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