Star Tech Journal

3
STAR*TECH JOURNAL/NOVEMBER 1982
BALLY/MIDWAY
ATARI
SERVICE BULLETINS/"TRON", "SOLAR FOX", "BLUE PRINT'
"TEMPEST' MONITOR JITTERS
Game: "Tron"
Subject: Leg leveler clearance at logic board
When leg levelers are inserted without leg-leveler nuts, the left leveler can damage the logic board.
Use only 2-inch type leg levelers with leg leveler nuts (Part Number 0017-00102-0048).
By Jeff Young
World Wide Distributors, Inc.
Grand Rapids, MI
Game: "Tron"
Subject: Objectionable vertical line (lower right side of video screen)
Modification:
Adjust vertical center and vertical shift controls to move objectionable line to the edge of the video
screen.
Check cycle game for correct boundary alignment.
Game: "Tron" (Serial #101-1202)
Subject: Control Assembly
Condition: Loose Actuating Pin
Modification: (An update of Mod in S*TJ, Vol. 4, #6)
Add a shoulder washer, a periphery washer and a roller as shown in Figure #1 (tighten securely).
Check out mechanically.
Notes:
I. Torque actuating pin to 75 in.fibs. ± 10%. It is suggested to use a loctite compound.
2. A light grease (0017--0008-0087) must be put between the actuating pin and roller.
Shoulder Washer
0628-00922-0000
Periphery (Dish) Washer
0017-00104-0014
Actuating Pin
0628-00700·00XF
After fighting a problem in the Atari "Tempest"
for three days and finding a silly mistake, I
thought I should write to you.
Wells-Gardner Monitors #19K6101 use a
1.5-ohm IO-watt resistor in location R610-
R710. If you replace these resistors with
standard wire-wound units, the monitor will
exhibit the "shakes" or "jitters" referred to in
S*TJ, Vol. 4, No. 7 Service Tips, but the
symptoms will be misleading in that R610 and
R710 must be Non-Inductive.
Please tell your readers about this problem
as Atari and Wells do not point out this
requirement in the parts listing, and only put
down the initials "N.I." on the schematic. •
PACE's
POWER DESOLDERING SYSTEM
REMOVES COMPONENTS FROM
ANY ELECTRONIC ASSEMBLY
""'!"" . : i
I ·i ) -:
;;
.i
Roller
0628-00706·00XF
Figure #1
Game: "Tron"
Subject: Self-Test BAD ROM Locations
When a bad ROM is located in self test, the video screen will indicate location 02, 03, etc.
Due to computer-type letters, this " O" is really the letter "D" which locates the bad ROM.
Game: "Tron" and " Solar Fox"
Subject: Power Supply (A082-90412-COOO)
A 68-ohm ½-watt resistor has been added between +5vdc and common (ground).
This resistor is a dummy load for proper voltage measurement when the logic board is
disconnected.
The dummy load resistor will not, however, affect the logic system if it is missing.
Game: " Blue Print"
Subject: ROM Self-Test Display
Due to an early program change, the ROM self-test display read out in the operating manual was not
used.
The following self-test display read outs are valid.
0
82
I
09
2
30
PROGRAM #1
4
3
5
D6
D5
FF
PROGRAM #2
(with falling flower pots)
0
I
2
4
3
5
00
56
10
DF
CE
FF
The ROM self-test display is the actual check sum total.
6
FF
7
7F
6
7F
7
7F
Pace's Model SX-301 is a completely self-
contained, spike-free power desoldering/
soldering system. The SX-301's new light-
weight, low-profile design makes it suitable for
any work station at any time.
The system contains two variably controlled
polarized outputs for temperature level control,
zero power switching for safe ESD operation, a
fast-rise vacuum pump with fixed vacuum
outlet, a variable pressure outlet for pressure/
hot-air jet operations and easy foot pedal
control switch. The unit is corrosion proof and
is shock mounted for vibration isolation. It
weights just 7½ pounds. Also featured is the
No Clog Dual Path Solder Extractor.
For more information, contact: Marc Siegel,
Pace, Incorporated, 9893 Brewers Court,
Laurel, MD 20707. (301) 490-9860.
Star*Te Address mqu,nes to: P.O. Box 1065, Merchantville, New Jersey 08109. Phone: 609/662·3432. Star*Tech Journal verifies the contents of the articles herein as much as
possible. However, any reader using this information does so at his/her own risk. Star*Tech Journal accepts no responsibilities for its advertisers' activities. Subscription
rates: U.S.A. - $40.00. Canada - $45.00. Other Countries - $70.00. Please remit payment in U.S. funds. Advertising rates available upon request. Staff: Publisher/Editor:
James Galore. Administrative Assistant: LT. Di Renzo. Art/Advertising Coordinator. Paul Ehlinger. Circulation Promotion: Linda Geseking. Contributing Technical Writers:
Todd Erickson, Joe Connor, Frank Becker.