STAR*TECH JOURNAL/JULY 1983
2 6
I_N_QizITIVE
.---- _ _ _ _ _
49. In digital gates and flip-flops, a higher 50. In shift registers made up of several flip-
voltage level usually indicates:
flops, the clock signal:
a) "l"
a) Tells what time it is
b)Yes
b) Indicates when to shift a bit of data from
c) "O"
the input of the flip-flop to the output
d)No
c) Is a bit of information stored in the flip-
e) a and b above
flop
t) c and d above
d) None of the above
lnQuizitive Answers (June)
51. Reading from right to left, binary digits
represent 1, 2, 4, 8, 16, 32, etc. Thus, the
decimal number "10" is written in binary
number code as:
bit values:
8 4 2
a) .......... . . . ............ 1 0 l 0
b) .... . ......... . .......... 0 0 1 0
c) ......................... 1 1 1 0
d) ......................... 1111
e) None of the above
45) b 46) e 47) e 48) e
HELP!
WILLIAMS GORGAR SOLENOID PROBLEM
Dear Stanffech Journal,
I'm writing to ask you for some help on a problem that has been plaguing
me for the past six months or more. It has to do with a Williams Gorgar that
blows the solenoid fuse, or burns up solenoid coils. The coils that burn up are
the 3-target reset coils (Gor & Gar) and the saucer-hole kicker.
I've tried the following things with no effect
• Replaced the Solenoid Driver Board
• Replaced the MPU Board
• Replaced the batteries, cleaned contacts for same
• Replaced the PIA on the Solenoid Board
• Checked all Supply Voltages from Supply
The game occasionally "locks up" when the ball is trapped on the magnet, .
repeating the message from three to six times. The coils bum up in the non-
operated condition, indicating low leakage current, but it is so intermittent,
occurring about once every two or three weeks. I've checked the whole
playfield wiring, and even called Williams' hot line and two distributors'
repair people - no help.
This letter was sent to us by Les Foggin, 615 N. Milwaukee Avenue,
Glenview, IL 60025 . .if you have any i,iformation regarding this problem
or can offer any assistance, please contact Les.
StAR1f IECH JOURNAL
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VOL. 5/#1 MARCH '83
Purity, Coovergence, and Tracking Adjustments for Wells-
Gardner Color X·Y Mooitor • On The Service Trail ..
Atarfs "Pole Position" Notes, Alan"s "Dig Dug" DifficlJlty
Adjustment. Atarfs "Black Wldow"rGravilal' Uixlate, The
OperatOf's Business Stallls, Sega "Tac-Scan" Conversion
Kit Bally/M ilway"Super Pac-Man" DrOI) Off, Baly/Midway
"Pac-Man Plus" • Sega "Frogge(' Intermittent Sound •
Rowe/Seeburg Service Tips • Atari "Pole Position" High
Score Retention Mod, Gas Pedal Maintenance, Steering
Wheel Lock-Up, Intermittent Gear Shill. Double Vision •
ROM/PROM Test Cable Assy • Sega Electronics' ROM
Line (Part 6) • Data East Cassette System Power Supply
Mod• NewSystemPreview/Atarfs "Xevious" • Coinco
Coo Return Level Mod • Bally/Midway "Pac-Man Plus"
Precaution • Taito "Front Line" Ribbon Cables • Taito
"Wild Western" Option Switch Settings • Atari Coin D00<
Part Numbers • Bally/Midway Picture Tube Interchange-
ability • Manufacts: Surrrnary of Major OJ>-Amp circuits
(Part 3) • News Bits/ NEC 4-Megabil Memory Chip •
Bally Featin Lamp Power Supply Mod • Gottlieb
· o·Bert" Technical Notes, Gottlieb's MA4000 FIiter Board,
Troubleshooting Gottlieb's"O•Bert" GG-111 System• The
"Beaf' Facts . .. Digital Logic Intro, 555 Timer Circuits,
Kasco "Driver II", Ticket Dispenser Feedback • An R&D
Tax Credit for Your Electrooic Coi~Dp Business? •
lnOuizilive • In Other Words/Video Games
VOL. 5/#2 APRIL '83
Stem "Lost Tomb" Service Notes • Atari "Pole Position"
Gas Pedal ModHication • On The Seivice Trail .. Atari
Cusl0018t'/Field Service, Atari "Millipede" and "Tempesr
Option Selling Recommendations, Wico's New Cootact
Points • Design Scene Slroolatioo System for Sale •
Bally Milway Service Bulletins: "Baby Pac-Mart' Vldiot
PCB Adjustments, "Baby Pac-Man" Schematic Typo,
"Baby Pac-Man" Flipper E.D.S. Wiri~ "Centalll" &
"Speak Easy" Solenoid Expander PCBs • Sega Elec-
tronics' ROM Line (Part 7) • Manufacturer Phone ,
Numbers for Canada and Other Countries • Gottlieb
"O•Bert" SY111>1oms/Possbe Causes, 8088 MicrqJrocessor
Notes• Nlntendo"DonkeyKongJr." Speed uiwDownKlts
• News Bits/Flat C001)Uler Displays • Manufacts:
Logic Board Lock-Ups • New System Preview/Nintendo's
"Popeye" • Tailo Troubleshooting Chart for FMP001
Switching Regulator • Atari "Pole Position" Pulley Cable
• The "Bear" Facts .. . Logic Truth Tables, "Scoutbalf'
Troubleshooting Tips • In Other Words/Technical Tenms
• Data East "Bump 'N' Jul11)" Option Switch Settings •
lnOuizitlve
VOL. S/#3 MAY '83
AOE '83 Highlights • Coln Acceptors, Inc. Introduces
low-Cost Logic Board Tester • Bally Midway Service
Bulletin: Thun1)8r Bumper Locking Ring • On The Service
Trall . .. National Lock ReportS oo Lockout Problem, AOE
'83 in Review• AOE Expo'83/Noo-Videos • Manufacts:
Sega ''Turbo" PROM ldenlllicalion Chart • News Bits/
Service TrendsSurwy. ADEAsldes. SegaEleclronlcs'
ROM Line (Part 8) • A New Company Introduces a New
Imaging Surface • New System Preview/Saga's "Star
Trek" • Bally Milway Wire Cheating Kits • Tech Shop
Profile • Bally Feature Lamp Burnout Cure • New-Tone
Electronics, lnc.'sTransien!Voltage Prolac1lon Unit• The
"Bear" Facts .. ' Logic Gates, Logic Math, Dlvid&-by-N
Counters. Pulse ' Generator, Namco "Holbalf' Hockey,
Destron"Blo-Rhythnf and"Astrograph" ModHlcatioos.
In Other Words,'Vldeo Game Manufaclllrers • lnQulzlllve
VOL S/#4 JUNE '83
AOE '83: Largest Yet • Kiddle Rides USA Debuts New
Rides • COINCO Conducts Service Seminars • On The
Service Tral .. . Willams Orop Target Jumper Wire Fix,
Wllllams "Black Knlghr Flipper Coll Replacement • Atari
"lefl1)8st" Color X·Y Monitor, Bally Midway "Super Pac-
Man" Enhancement Chip • TCG Adds New Replacement
Parts • Manufacts: lntrocilclion to the 68000 • News
Bits/Hybrid Flat Displays, Other Video Game Applications
• Sega Electronlcs' ROM Line (Part 9) • Chemtronlcs
Electronk: Grade Coolant • Bally Midway "Grand Slam"
Fly-Away Target Adjustmen, Bally Milway "Journey"
Cassette Notes • New System Preview/Clnematronics'
"Cosmic Chasm"• TechShopProflle/Unll8dDislribulors,
Inc. • SEga Eleclronlcs Service Bulletins: Sega G-80
~ Supply Ground Mod, Sega "Zaxxon" Upright/Table
Joyslk:k Mod • Sega Color X· Y Monitor Zener Replac.-
men! • Analyzing the Data East Cassette System • The
"Bear" Facts: PAO Show, R-S Latch Operation, Keyboard
Programmable Dlvlde-By,N Counter, "Scoulbalf' Trouble-
shoolilgllpsforllghlorSoundFaliln. SoleProprletor·
ship LHe Insurance • Randuslrial Corp. Maintenance
Catalog • In Other Words/Pinball Gamel/Mfg. •
lnOulzltlve
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