Hitachi 28LD5200E specifications Yes

28LD5200E (PW1L)

Power cannot be turned on (LED does not light)

Is the input voltage

No

applied to Power supply unit?

(CN5 [1][3])

Yes

AC

Power

Power supply

Sub

inlet

switch

unit

Power board

Are the

voltages applied to

P804 [1][8]pins, P806[1]pin

No

and P808 [1][4][8][12]pins

of Power supply

unit?

P804 [1] +5V

P808 [1] +30V

[8] +6V

[4] +5V

Yes

[8] +12V

P806 [1] +12V

[12] +10V

Joint / Formatter PWB

Is the voltage

Yes(high)

applied to P804[3]pin of Power

supply unit high?

Picture is displayed. But no sound

P804 [3]

No(low)

Power GO

Is the voltage

Check

Unlocked

applied to P804[5]pin of Power

Speaker terminal and

Yes(high)

supply unit high?

Speaker cord.

Check

No(low)

P804 [5]

Locked

No sound

Power OFF

Joint / Formatter PWB

Power

Are the voltages

No

supply unit

applied to EAJ1[1][5]pins

of the Audio PWB?

	Yes	[1] +5V					Are the voltage
		[5] +12V
						applied to EAJ1[1][5]pins?
		[3] GND
							(When EAJ1 is
							disconnected.)
	Are the signals		No
applied to EAF1[1][3]pins
							Yes
of the Audio PWB?
	Yes	[1] L ch					Audio PWB
		[3] R ch
				Formatter PWB or
		[2] GND
					Video PWB
	Are there signals
			No
on Speaker Terminals?
	Yes
					Audio PWB
	Speaker

No

Power supply

unit

20

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