Garland EM-C180 service manual Component, Checkout Procedure, Result, Power, P.C.B, Control

WARNING:

When removing the cabinet, you must disconnect the power supply cord from the wall oulet for your safety. Only the checkout procedure below needs the power supply on. TAKE GREAT CARE to avoid possible electrical shock.

For your safety, proceed with the test only after removing the wire leads from the pri- mary winding of the high voltage transformer

Primary

Winding

Lower

Primary

Winding

Upper

COMPONENT	CHECKOUT PROCEDURE	RESULT
	Check voltage at S104 and S105 after remov-	Normal reading:
POWER	ing each connector (female) from power circuit	Connection
	board.
P.C.B
	Pin No.3 (Ground) and 4,5, 1,2 at S105.	Pin No.,	Voltage(V)
	Pin No.1 and 2 at S104.	S105
		#3 to #4	DC 12
	CAUTION:	#3 to #5	DC 16
	For your safety, proceed with the test only	#3 to #1	DC 30
	after removing the wire leads from the pri-	#3 to #2	DC 35
	mary winding of high voltage transformer.	S104
	Test procedures:
	a) Make sure that the power supply cord is not	#1 to #2	AC 2.4
	plugged in.
	b) Remove the connector S104 and S105 from
	the power circuit board.
	c) Plug the power supply cord : back in.
	d) And then, measure each voltage.
	Measure the voltage: Between test points TP-1,
CONTROL	TP-2 ,TP-3 and ground (See figure 16 on page	Test point
	23)
P.C.B		TP,	Voltage(V)
	Note	TP-1	DC - 5
	- Proceed with the check of the control P.C.B to
		TP-2	DC - 12
	see if any one of the measured values is differ-
		TP-3	DC - 16
	ent from the specified values.
		TP-4	DC - 35

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