Philips V30 manual Repair Flow Chart, 107T5, Go to cover page

Repair Flow Chart

A. Power Supply Failure

107T5 73

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1. Sympton :

no startup sound LED light off

check 7102 pin8 100V<pin8<380V

NO

check

1102/6101/

7101/2105

	check 7102
Ok
	pin1 > 2V

replace 7102

	check 7102
Ok
	pin 5=2.4V
		NO

replace 7102

check

6105

Ok	check 7102
	pin6 output ?
	Ok	NO
	check
	3113/
	3104/7101
	check
	pin6>8V

2.Sympton : hicup mode with startup sound or blinking LED

Turn power off
check the resistance for	check 7102
all output voltages+190,
	pin 1 < 13.5V
83,12,-12,+6.0,+5,
check 6151~6158 short?
		No

	check 7102
OK
	pin 5
		No

check	check 7105		OVP possibly active	OCP possibly active
		No		check 3109
7155/7152/7154	open circuit		check 6105
				3105,
			Ok
			replace 5156	replace 5156

7102 pin4 DEMAG possibly active short 7154 pinC

OK

Ok

check CPU pin 22