Sl'AR1f IECHJOURNAL
THE TECHNICAL M9NTHLY FOR THE AMUSEMENTS INDUSTRY
VOLUME 8, NUMBER 7
SEPTEMBER 1986
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Atari PAPERBOY Display Failures ·
By Atari Field Service Department
Milpitas, California
GAME:
System II (PAPERBOY) Medium Resolution
Display Failures.
SYMPIU-1.:
The loss of one or roore of the RGB colors
on the raster of the ADI display roodel
AGM-20M.
PRCBLEM:
Cold solder joints on transistors Q202,
Q206, and Q210 of the RGB anplifier
circuit located on the Main Circuit Board
Assenbly.
Tinning the soldering iron with some
solder prior to touching the pad will
shorten the time the iron is required to
touch the pad.
OOl'E:
Reassenble the Assenbly to the chassis of
the display to check for proper operation.
If this does not fix the problem, try
resoldering the associated conponents in
the anplifier circuit. If the color is
still missing, troubleshoot the anplifier
circuit.
If you still have probleIIE, please call
Atari Service at (408) 434-3950.
SOLUTICN:
Reroove the Main Circuit Board Assenbly
rrounting screws from the chassis. Slide
the Assenbly to the rear of the display
frame and tilt the chassis up so that the
front of the Assenbly can be set on the
bench.
Locate the pads of transistors Q202, Q206,
and Q210 on the trace side of the board.
Touch the tip of a hot soldering iron to
each of the transistor pads (marked E, B,
and C). Hold the tip of the soldering iron
on the pad just long enough to melt the
solder (approxiimately 5-6 seconds).
CAUI'ION: Holding the iron on the pads
longer may cause permanent damage to the
solder pad or transistor.
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Atari ROADRUNNER Color Ram Failure
By Atari Field Service Department
Milpitas, California
Symptoms: On power-up or self-test,
game comes up with Color Ram
Failure.
Solution:
the LSI Main PCB, (larger of
the two PCBS), at I.e. location
5C (74I.S244) add a 330 ohm l/4w
resistor from pin 13 to ground,
and another 330 ohm resistor
from pin 15 to ground.
On
STAR•TECH JOURNAL, September 1986,
Volume 8, Number 7. Copyright (c) 1986 by
Star*Tech Journal, Inc. ALL rights
reserved. Address inquiries to: POB 1065,
Merchantville, NJ 08109. Advertising rates
on request. Phone: 609/662-1080.
James Calore: Publisher/Editor.