Pioneer PRO-510HD 3. P.D, If the FU202 and FU204 fuses are blown, see the following table

PRO-610HD, PRO-510HD, SD-582HD5, SD-532HD5

Note: The anode of the diode is high only for a short time after the power is turned on until the protection circuits are activated (P.D.) The LEDs are lit by the HOLD circuit.

Note that the power may be shut down when the voltages 130 V, 25 V, and 12 V from the POWER SUPPLY Assy are not supplied because the DEFLECTION SERVICE Assy is powered by the POWER SUPPLY Assy.

When overload detection mechanisms 1 and 2 are activated, the 130 V line is short-circuited. If the power switch is set to ON again in this condition, there may be a case where the power cannot be turned on, with just a whining sound, and where only the D915 LED in the POWER SUPPLY Assy is lit. If this happens, first replace only the DEFLECTION SERVICE Assy, disconnect the AC cord from the AC outlet or turn the main power switch OFF, and wait for five minutes. Then, turn on the power again. If the condition is ameliorated, only the DEFLECTION SERVICE Assy is defective. If the same symptom occurs, replace the POWER SUPPLY Assy. In the latter case, the DEFLECTION SERVICE Assy may not be defective.

Be sure to check the fuses in the POWER SUPPLY Assy because one or more may be blown as a result of short-circuiting of the load circuit of the DEFLECTION SERVICE Assy.

3. P.D. (3)

Failure in the CONV. AMP Assy

The following reason may be suspected: 1. V. deflection stopping detection

Status	Causes	Check Items	Probable Defective Parts
		Check that the connectors (G1, G2, G3) of the	Plug in the connectors.
		convergence yoke are plugged in.
		Check that the connectors (G4, G5) of the DIGITAL	Plug in the connectors.
		CONV. Assy are plugged in.
		Check that the connector (H4) from the POWER
		SUPPLY Assy is plugged in to the DIGITAL CONV.	Plug in the connectors.
		Assy.
		Check that the connector (H3) from the
D923, P.D.	V. deflection stopping	DEFLECTION SERVICE Assy is plugged in to the	Plug in the connectors.
LED, lit		DIGITAL CONV. Assy.
		Abnormality in V. BLK 2 waveform that is output
		from Pin 6 of the CN1653 in the DIGITAL CONV.	IC4802 in the SUB VIDEO Assy
		Assy (too long a high period with the DC voltage on)
		Abnormality in V. BLK 0 waveform that is output	IC301 in the DEFLECTION SERVICE
		from Pin 2 of the CN1652 in the DIGITAL CONV.
			Assy
		Assy (too long a high period with the DC voltage on)
		No waveform is output from Pin 1 of the CN902.	Q913, Q914

Note: The anode of the diode is high only for a short time after the power is turned on until the protection circuits are activated (P.D.) The LEDs are lit by the HOLD circuit.

Be sure to check the fuses in the POWER SUPPLY Assy because one or more may be blown as a result of short-circuiting of the load circuit of the CONV. AMP Assy. See the table below.

Note that the power may be shut down when the voltages 25 V, -20 V, +5 V and -5 V from the POWER SUPPLY Assy are not supplied because the CONV. AMP and DIGITAL CONVER. Assys are powered by the POWER SUPPLY Assy.

If the FU202 and FU204 fuses are blown, see the following table:

Causes	Check Items	Probable Defective Parts
	Check that waveform signals are output from Pin 3 and Pin 5
Too high loading on the CONVER. AMP	of the CN901, CN902 and CN903, and that the DC element is	IC901, IC903
	not added to the signals.
CONVER. MUTING not activated	Check that the electric potential of Pin 3 and Pin 4 of IC901	Q904, Q918
	and IC903 are at the same level when the power is turned on.

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