Williams Sound 16P-3001-103 R-T manual 5

CMOS RAM DIAGNOSTICS – TEST 3

From RAM Diagnostics depress ADVANCE in AUTO-UP.

RESULT	CRT	LED INDICATION	FAULTY AREA
	INDICATION
PASS	CMOS RAM TEST	¡¡•¡	-
		3rd LED blinks
	PASSED	twice.
	CMOS RAM	¡¡•¡	CMOS RAM 1E memory
FAIL	FAILURE		protect gates 4J, 6H, or
		3rd LED lights.
			address decoder 4K, 5P.
	CMOS	¡¡•¡	Coin door interlock,
	INTERLOCK		Memory protect gates 5B,
		3rd LED lights.
	FAILURE		6H,4J, OR CMOS RAM 1E

COLOUR RAM TEST – TEST 4

From CMOS RAM test depress ADVANCE in AUTO-UP.

		COLOUR					FAULT
CRT SEQUENCES THROUGH 8		SEQUENCES			RAM 2C			RAM 1C
COLOURS, 2 SECONDS EACH	1 LIGHT RED			Band of red				Band of magenta
	2	RED		intensity variance
	3	DARK RED		or washout
	4	LIGHT GREEN		Band of yellow				Band of cyan
	5	GREEN
	6	DARK GREEN
	7	LIGHT BLUE		Band of magenta				Band of blue
	8	BLUE						intensity variance
	9	DARK BLUE						or washout
	4	LIGHT GREEN		Band of green				Band of dark	green
VERTICAL BAND INDICATES								or washout
	5 GREEN			Band of light green				Band of faint
COLOUR RAM FAULT.								green, Band of
¡¡¡•								darker green
	6 DARK GREEN							Band of washout
4TH LED REMAINS LIT
	Note		that a blank		sequence	or	two	sequences with	same
DURING TEST	shade		indicate	2C	or 1C RAM	or	color analogue circuit
	faulty.

Tests 5 and 7 provide sequential subtests. To stop automatic cycling set switch to MANUAL/DOWN. Depress ADVANCE in MANUAL-DOWN to step through subtests.

SOUND TEST – TEST 5

From Color RAM test, depress ADVANCE in AUTO-UP.

Test sequences sounds 1 through 31, skipping 19, 27, and 28.

Missing Check

12P4/10P3 Pin 3

22P4/lOP3 Pin 2

42P4/10P3 Pin 5

82P4/10P3 Pin 4

16 2P4/10P3 Pin 7

All Perform Sound Board Diagnostics