Star Tech Journal

Issue: 1983-October - Vol 5 Issue 8

STAR*TECH JOURNAL/OCTOBER 1983
26
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The names of various Star*Tech Journal
Advertisers comprise this issue's word
puzzle. Find and encircle these words as
they appear below. They run vertically,
horizontally, diagonally and sometimes
backwards.
S*TJ ADVERTISERS
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Find these hidden words in the above puzzle:
RCA
COIN
CROWN
AMAZIN
NEWTONE
REPAIRS
SPECTRA
BALLY
BOBS
HOFFMAN
RIPPY
SFMUSIC
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64. PNP transistors are less widely used than NPN types because:
a) they were only recently invented, so designers are less familiar with them.
b) they perform an altogether different operation than NPN transistors - a function
that happens to be considerably less useful.
c) they are generally slower in operating speed than NPN types.
d) they are generally more costly to manufacture than NPN types.
e) c and d above.
65. The hFE or "beta" of a transistor is:
a) the noise figure.
b) the current gain.
c) the ratio of output signal current to input signal current
d) the degree of current amplification of the transistor.
e) All but a above.
lnQulzltive Answers (September) 56)a
57)a
58)e
59)e
60)a
StaNtTech Journal Technical Seminars
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63. What is the advantage of using an NPN and a PNP transistor instead of two NPN
transistors in a class B amplifier (that is, "push-pull" type- in which one transistor is
on when the other is off)?
a) The PNP is cheaper and works just as well.
b) There is no particular advantage. An NPN can do the very same thing that the
PNP does.
c) The PNP transistor can regulate alternating current passing through it
d) The input can be connected fairly simply and directly to both transistor bases,
because the PNP turns on when conventional current is withdrawn from the base
while the NPN turns on when conventional current is pumped into the base.
e) None of the above.
Left to themselves, things tend to go from bad to worse.
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62. Which symbol is the PNP transistor?
MURPHY'S LAW #508
T M
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transistor performs as a switch or an amplifier is:
a) the type of transistor.
b) the control circuit which provides the input signal to the transistor.
c) the working circuit
d) the transistor package.
d) None of the above.
I
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61. In a basic transistor circuit, the most significant factor which detennines whether the
Distributror-sponsored S•TJ Technical Seminars are available to any distributor
interested in assisting their clients understand operation and maintenance of videos, pins
and lasers.
If you'd like to sponsor this 5-day course, contact Star*Tech Journal at 609/662-3432
and ask for our information package. This package helps you plan your promotion for a
successful seminar.
Here is the answer key
to September's puzzle:
GAME SYNONYMS
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IN
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OLD ADDRESS
0
C
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Address _ _ _ _ _ _ _ _ _ _ _ _
STAR*TECH JOURNAL/OCTOBER 1983
27
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VOL. 5/#1 MARCH '83
Purity, Convergence, and Tracking Adjustments for Wells-
Gardner Color X-Y Monitor • On The Service Trail . .. Atari's
"Pole Position" Notes, Atari's "Dig Dug" Difficulty Adjustment
Atari's "Black Widow"f'Gravitar" Update, The Operato(s Bus~
ness Status, Sega "Tac-Scan" Conversion Kit Bally/Midway
"Super Pac-Man" Drop Off, Bally/Midway "Pac-Man Plus" •
Sega "Frogger" Intermittent Sound • Rowe/Seeburg Service
Tips • Atari "Pole Position" High Score Retention Mod, Gas
Pedal Maintenance, Steering Wheel Lock-Up, Intermittent Gear
Shift Double Vision • ROM/ PROM Test Cable Assy • Sega
Electronics' ROM Line (Part 6) • Data East Cassette System
Power Supply Mod • New System Preview/Atari's "Xevious"
• Coinco Coin Return Level Mod • Bally/Midway "Pac-Man
Plus" Precaution • Taito "Front Line" Ribbon Cables • Taito
"Wild Western" Option Switch Settings • Atari Coin Door Part
Numbers • Bally/ Midway Picture Tube Interchangeability •
Manufacts: Summary of Major Op-Amp circuits (Part 3) •
News Bits/ NEC 4-Megabit Memory Chip • Bally Feature
Lamp Power Supply Mod • Gottlieb "Q•Bert" Technical Notes,
Gottlieb's MA4000 Filter Board, Troubleshooting Gottlieb's
"Q•Bert" GG-11I System • The "Bear" Facts . .. Digital Logic
Intro, 555 Timer Circuits, Kasco "Driver II", Ticket Dispenser
Feedback • An R&D Tax Credit for Your Electronic Coin-Op
Business? • lnQuizitive • In Other Words/Video Games
VOL. 5/#2 APRIL '83
Stem "Lost Tomb" Service Notes • Atari "Pole Position" Gas
Pedal Modification • On The Service Trail .. Atari Customer/
Field Service, Atari "Millipede" and "Tempest" Option Setting
Recommendations, Wico's New Contact Points • Design
Scene Simulation System for Sale • Bally Midway Service
Bulletins: "Baby Pac-Man" Vidiot PCB Adjustments, "Baby
Pac-Man" Schematic Typo, "Baby Pac-Man" Flipper E.O.S.
Wiring, "Centaur" & "Speak Easy" Solenoid Expander PCBs •
Sega Electronics' ROM Line (Part 7) • Manufacturer Phone
Numbers for Canada and Other Countries • Gottlieb "Q•Berf'
Symptoms/Possible Causes, 8088 Microprocessor Notes •
Nintendo "Donkey Kong Jr." Speed Up/Down Kits • News
Bits/Flat Computer Displays • Manufacts: Logic Board Lock-
Ups • New System Preview/Nintendo's "Popeye" • Taito
Troubleshooting Chart for FMP001 Switching Regulator •
Atari "Pole Position" Pulley Cable • The "Bear" Facts ... Logic
Truth Tables, "Scoutball" Troubleshooting Tips • In Other
Words/Technical Terms• Data East"Bump 'N' Jump" Option
Switch Settings • lnQuizitive
VOL. 5/#3 MAY '83
AOE '83 Highlights • Coin Acceptors, Inc. Introduces Low-
Cost Logic Board Tester • Bally Midway Service Bulletin:
Thumper Bumper Locking Ring • On The Service Trail ...
National Lock Reports on Lockout Problem AOE '83 in Review
• AOE Expo'83/Non-Videos • Maoofacts: Sega"Ttxtxf PROM
Identification Chart • News Bits/ Service Trends Survey •
AOE Asides • Sega Electronics' ROM Line (Part 8) • A New
Company Introduces a New Imaging Surface • New System
Preview/Sega's "Star Trek'' • Bally Midway Wire Cheating
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Kits • Tech Shop Profile • Bally Feature Lamp Burnout Cure
• New-Tone Electronics, lnc.'s Transient Voltage Protection
Unit • The "Bear" Facts .. . Logic Gates, Logic Math, Divide-
by-N Counters, Pulse Generator, Namco "Hotball" Hockey,
Destron "Bio-Rhythm" and "Astrograph" Modifications • In
Other Words/Video Game Manufacturers • lnQuizitive
VOL. 5/#4 JUNE '83
AOE '83: Largest Yet • Kiddie Rides USA Debuts New Rides
• COINCO Conducts Service Seminars • On The Service Trail
... Williams Drop Target Jumper Wire Fix, Williams "Black
Knight'' Flipper Coil Replacement• Atari"Tempest" ColorX-Y
Monitor, Bally Midway "Super Pac-Man" Enhancement Chip •
TCG Adds New Replacement Parts • Manufacts: Introduction
to the 68000 • News Bits/Hybrid Flat Displays, Other Video
Game Applications • Sega Electronics' ROM Line (Part 9) •
Chemtronics Electronic Grade Coolant• BallyMidway"Grand
Slam" Fly-AwayTarget Adjustment Bally Midway "Journey"
Cassette Notes • New System Preview/Cinematronics'
"Cosmic Chasm" • Tech Shop Profile/United Distributors, Inc.
• Sega Electronics Service Bulletins: Sega G-80 Power Supply
Ground Mod, Sega "Zaxxon" Upright/Table Joystick Mod •
Sega Color X-Y Monitor Zener Replacement • Analyzing the
Data East Cassette System • The"Bea(' Facts: PAO Show, R-
S Latch Operation, Keyboard Programmable Divide-By-N
Counter, "Scoutball" Troubleshooting Tips for Light or Sound
Failure • Sole Proprietorship Lile Insurance • Randustrial
Corp. Maintenance Catalog • In Other Words/Pinball Games/
Mfg. • lnQuizitive
VOL. 5/#5 JULY 1983
News Bits/Dept of Labor Service Industry Growth Report New
Tube Family • Abloy Electric Switchlocks Get UL Listing •
On The Service Trail ... Atari "Pole Position" Front Glass Panel
Atari "Dig-Dug'' and "Xevious" Contact Points, Sega Sit Down
"Star Trek'' Start Button, Meltec "Boom Balls" Trouble Areas •
Bally Midway Service Bulletins: "Journey" Intermittent Shut-Off
of Tape Cassette, "Mappy" Difficulty Level Setting, "Wacko",
"Kozmik Krootr", "Journey", etc. Power Schematic Manual
Errors, "Super Pac-Man"/ "Mappy" Similar Electronics Circuits
• Midway Initiates Service Newsletter for Operators •
American Lock Company Develops New Security Cam Lock •
Wells-Gardner Color X-Y High Voltage Supply • Pace's Pulse
Heat Power Source • Manufacts: Sega Electronics' "Turbo"
Troubleshooting (Part 1) • Sega's New24-Hour Rapid Return
on Serviced Parts • Chemtronics Triple Purpose Plastic/Glass
Cleaner • Build Your Own Logic Probe • Cinernatronics
"Cosmic Chasm" Engineering Changes: Monitor. Jitter, Stray
Lines, Power Problem Cooling, Erratic Trackball Game Lock Up,
Power Up Credits, Muffled Audio • Sega Electronics' ROM
Line(Part10) • NewSystemPreview/Universal's"Mr. Do!"•
Analyzing the Data East Cassette System (Part 2) • The
Importance of Good Cash Management • Tech Shop Profile/
Pioneer Sales& Service Inc. • The "Beaffacts: Power Supply
Primer, JK Divide-By-Counters, "Audio Skeeball" Tickets,
Cotton Candy Vendor Retrofit KiVNew EPROM, Troubleshooting
the CDC Micron Timer • Industry Technical Schools • Bally
"Baby Pac-Man" Switched Illumination Mod, Atari "Quantum"
Monitor Mod • In Other Words/Conversion Kits • lnQuizitive
• HELP! Williams "Gorgar" Solenoid Problem
VOL. 5/#6 AUGUST '83
News Bits/Downloading Video Software, ICs Soon to Become
Centipedes • Armor Chain Company Announces New Ant~
Theft Anchor for Vending Machines • On The Service Trail ...
Varistor Protection, Sega's "Star Trek" Kit Taito Rectifier Heat
Sinks, Williams' New Plastic Cabinets • Atari Tech Tips:
Dangerous Display Harness, Using the 280 Interface, "Food
Fight" Joystick CalibratiorvSelecting Options • Bally Midway
125VA Power Supply Blown Fuses Care • Bally Midway
Service Bulletins: "Baby Pac-Man" Memory Combinations,
"Ms. Pac-Man" RFI Modification• Atari "Star Wars" Hardware
• Sega "Star Trek''/"The Kit'' • Sega 24-Hour Turnaround
Update • Gottlieb Power Distribution for the GG-I11 Video
System • Atari "Pole Position" Heat Cure • ETA Elects New
Officers at Annual Convention • TD P's New"Motion Fluid 60"
Handles Lubrication for Close-Fitting Parts • New System
Preview/Atari's "Star Wars'' • Protection Mod for Kurz-Kasch
TF650 • Tech Shop Profile/Sandler Vending Company •
Manufacts: Sega Electronics' "Turbo" Troubleshooting (Part 2) •
The "Bear" Facts: Using Ohm's Law, How to Troubleshoot DC
Power Supplies, Troubleshooting Gino Rondina Hydraulic Toys,
"Superball" Ticket Motor Drive Mod; Ball Release Kit Ball Stop
Guard, Ikemoto "Frog Hunter" Ticket Dispenser Kit • How to
Use Low-Cost Photo Equipment to Fight Crime • lnQuizitive
• All-Purpose Non-Contact Aerosol Dust/Lint Remover
Announced by Chemtronics • In Other Words/CPU System
VOL 5/#7 SEPTEMBER '83
News Bits/Funtastic Signs with the Games Network, Home
Computers to Win in Electronic Game Market Gameline Offers
On-Line Video Games for the Atari VCS • Sega Monitor Repair
Policy • On The Service Trail. .. Atari's "Food Fight" Location
Adjustments, Atari's "Star Wars" Controls/Monitor Hi-Voltage
Board, Williams New Flipper Assembly, Sega's "Star Trek'' Kit
Installation • Troubleshooting Gottlieb's "Q•Berf'/Foreground,
Background• AMOA Exposition 1983 • The"Bear" Facts ...
Series and Parallel Resistance/Capacitance Ckts, Non-Video
Game Troubleshooting (Part 2), Bally "Baby Pac-Man" Power-
Up Problem Solid State Sound Replaces Tape Players in Kiddie
Rides • Sega Plans Release of Real-Time Interactive Laser
Disc System • Bally "Mr. & Mrs. Pac-Man" Top Saucer
Problem • Ten Ways to Ruin Your Business • Manufacts:
Troubleshooting the Atari Amplttone Color X-Y Display, Atari
"Crystal Castles" Checksums • Atari "Star Wars" Color X-Y
Monitor Modifications • New System Preview/Cinematronics'
"Dragon's Lair" • Sega Tech Tips/Universal Sound Board •
Arcade Debit Card System • 7th Annual Bally Midway 5-Day
School • Tech Shop Profile/Bally Southwest • Atari Tech
Tips: Amplilone Color X-Y Monitor Voltage Regulator Ckt
"Tempest'' Wells-Gardner X-Y Monitor IPC Board Mod •
Service Tips: Nintendo Monitor Vertical Roller, Bally Pins 555
Lamp Burnout Bally "Baby Pac-Man" Feature Lamp Burnout
• In Other Words/Game Synonyms • lnQuizitive
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