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ROM DIAGNOSTICS – TEST 1
From game over, depress ADVANCE IN MANUAL-DOWN.
RESULT
CRT
INDICATION
LED INDICATION CORRECTIVE ACTION
PASS ALL ROMS OK
¡l¡¡
2
nd
LED blinks
twice.
None
FAIL
ROM FAILURE
x
¡l¡¡
2
nd
LED lights.
Replace ICx on ROM Board
or depress ADVANCE in
MANUAL-DOWN; Replace:
(x=ROM No
1 – 12)
Chip Indicated:
¡¡¡l
¡¡l¡
¡¡ll
l¡¡¡
l¡¡l
l¡l¡
l¡ll
¡l¡¡
¡l¡l
¡ll¡
¡lll
ll¡¡
IC1
IC2
IC3
IC4
IC5
IC6
IC7
IC8
IC9
IC10
IC11
IC12
RAM DIAGNOSTICS – TEST 2
From ROM Diagnostics depress ADVANCE in AUTO-UP.
RESULT
CRT
INDICATION
LED INDICATION CORRECTIVE ACTION
TESTING
Random
Pattern
- Depress ADVANCE in AUTO
to bypass test.
PASS ALL RAMS OK
l¡¡¡
1
st
LED blinks
twice.
-
FAIL
RAM FAILURE
xy
l¡¡¡
1
st
LED lights.
Replace RAM (see
following) or depress
ADVANCE in MANUAL-DOWN
(x=Bank,
y=Chip No)
Bank Indicated:
¡l¡¡ = 1
l¡¡¡ = 2
¡¡l¡ = 3
Depress ADVANCE in
MANUAL-DOWN
Chip Indicated:
¡¡¡l = 1
¡¡l¡ = 2
¡¡ll = 3
l¡¡¡ = 4
l¡¡l = 5
l¡l¡ = 6
l¡ll = 7
¡l¡¡ = 8
Replace in bank:
1 2 3
1R 2R 3R
1S 2S 3S
1T 2T 3T
1U 2U 3U
1W 2W 3W
1X 2X 3X
1Y 2Y 3Y
1Z 2Z 3Z