Genius 3693, ISO XFR-75W, 2093, 1493, 2793, 1793 Equipment Setup For Repairing The Model XX93 Monitor

Equipment Setup For Repairing The Model XX93 Monitor.

OSCILLOSCOPE

+17.1

DVM

No DVM

320Vpp 40,G1

1-4VDC 12Vpp 50,E2

115 VAC

ISOLATION

TRANSFORMER

ISOLATED

DUAL 1A DC

POWER

SUPPLY

0 to 30V 0 to 30V

VARIABLE

TRANSFORMER

Test

Generator

or

Signal

Source

CERONIX Model XX93

When all else fails, connect 20 volts to the power supply 17 volt line and slowly increase the AC voltage up to just before the the power supply chirps. This is called the smoke test.

Legend Description

	Represents the XX93 board part number. The parts list gives the
No.	{ CERONIX PART NUMBER which is indexed to the board part number.

LTR.No. Part numbers of the resistors on the PRA indicated by LTR.

X

X{ PRA pin number. To determine which PRA the pin number belongs to, look for the nearest PRA part number on that line.

X- DC voltages are measured to GND except in the power supply

Y V

X-Y VDC where V- is the reference. Use a DVM for DC measurements.

	LEGEND
No	BOARD PART No.

X-Y VDC Sync.

Vp-p TP-REF.

WAVEFORM

Test Point, board cross REFerence location.

{ The waveform is normally checked with a oscilloscope. It has a P-P voltage amplitude of Vp-p .

	Measurements
CAUTION: When making measurements	are taken with
	a white screen.
on the power supply be sure that the other
	Hs - 5uS/div.
scope probe is not connected to GND.
	Vs - 2mS/div.

LTR.No		PART No. ON PRA.
.X	X	PRA PIN No.
X-		DC VOLTAGE RANGE,
Y	X-Y VDC	{USING A DMM.
X-Y VDC Sync.		USE V. or H. SYNC.
		AC VOLTS TEST POINT
Vp-p TP-REF.
WAVEFORM		Peak to Peak ASS. REF.
		Measured with scope

92