Marantz PM8003 Troubleshooting Guide | PM8003 Amplifier Manual

trouBleshootiNg

BeFore coNsideriNg it as a Failure

In case of trouble with this component, ﬁrst check the following before calling for service. What seems to be a serious malfunction is often due to a simple operation mistake.

If the trouble is not ﬁxed after making the following checks, contact the place of purchase, your nearest Marantz dealer, our customer service center, or our repair service center.

Phenomenon	Causes	Actions
	The power cable is disconnected.	Check the power cable connections.
		Turn the INPUT SELECTOR knob or
	The unit is in STANDBY mode.	press the POWER ON button on the
Power is not supplied.		remote controller.
		If the STANDBY indicator is ﬂashing,
	The protection circuit is activated.	turn the power OFF, then ON again
		after 1 minute or more.
	Speaker connection is incomplete.	Check the speaker cable connection.
	Input cord connection is incomplete.	Check the input cable connection.

	The INPUT SELECTOR knob is not set	Set the INPUT SELECTOR knob
	correctly.	properly.
	The VOLUME knob is set to minimum.	Turn the VOLUME knob to the proper
Power is supplied, but no	The VOLUME knob is set to minimum.	level.
		level.

sound is heard from the	• The SPEKAERS knob is set to OFF.	Set the SPEAKERS knob properly
speaker.	• Setting of the SPEAKERS knob is	according to the SPEAKER terminals
	incorrect.	to which the speakers are connected.
	Setting of the POWER AMP DIRECT	Set the POWER AMP DIRECT button
	button is incorrect.	properly.
		If the MUTE indicator is lit, press the
	The MUTE function is activated.	MUTE button on the remote controller
		to release the MUTE function.
Sound is heard from left or	Speaker connection is incomplete.	Check the speaker connections.

	Setting of the BALANCE knob is
right speakers only.	Setting of the BALANCE knob is	Set the BALANCE knob properly.
	incorrect.	Set the BALANCE knob properly.
	incorrect.
Left and right channels are	Connection of left and right speaker	Make connections properly.
reversed.	cords or input cords is reversed.	Make connections properly.
reversed.	cords or input cords is reversed.
	Grounding connection from the record	Check the connections to the PHONO
	player is improper.	GND terminal.
Noise occurs during record	Connection to the PHONO jacks is	Check the connection to the PHONO
playing.	incorrect.	input jacks.
	A TV set or the like placed too close to	Place the TV set or record player in
	the record player may affect the sound.	another position.
	Speakers are placed too close to the	Place the speakers away from the
Howling occurs when sound	record player.	record player as far as possible.
volume is increased during	The record player is placed on a rack or	If an insulating pad is not supplied with
record playing.		If an insulating pad is not supplied with
record playing.		the record player, use an insulating pad
	ﬂoor that is easily vibrated.	the record player, use an insulating pad
	ﬂoor that is easily vibrated.	available in the market.
		available in the market.

aBout the protectiVe circuit

This unit is equipped with a protective circuit to protect the ampliﬁer circuits and speaker system against damage.

If the protective circuit is activated, the sound is instantly muted.

In this case, either the MUTE indicator ﬂashes, or the STANDBY indicator above the POWER ON/OFF button ﬂashes.

at poWer oN

For about 8 seconds after the power is turned on, the protective circuit is activated muting the sound to give the ampliﬁer circuits time to stabilize. Once the ampliﬁer circuits stabilize, the protective circuit releases and audio is enabled.

iN the eVeNt oF oVercurreNt

The protective circuit is activated if current exceeding a certain level is detected, which can happen if excessive signal ﬂow is input to the ampliﬁer or if the unit is connected to a speaker system of less

than 4Ω impedance. The protective circuit is also activated if a speaker cable shorts.

In these cases, the MUTE indicator ﬂashes, and the volume is automatically reduced. Approximately 15 seconds later the protective circuit is released, therefore the volume needs readjusting to continue normal use.

Moreover,iftheovercurrentcontinues,theampliﬁer’s power shuts OFF and the STANDBY indicator above the POWER ON/OFF button ﬂashes.

iF eXcessiVe ultra-Bass sigNals are iNput

The protective circuit is also activated if ultra- bass signals that exceed the base signal range settings are input. In this case, the MUTE indicator ﬂashes, and the volume is automatically reduced. Approximately 15 seconds later, the protective circuit is released, therefore the volume needs readjusting to continue normal use. If excessive ultra-bass signal input continues or if DC voltage is detected due to trouble with the ampliﬁer, the power shuts OFF and the STANDBY indicator above the POWER ON/OFF button ﬂashes.

ENGLISH

iF the maiN-ampliFier oVerheats

The protective circuit is activated if the temperature of the main-ampliﬁer section rises above a certain level, which can happen if the ampliﬁer is continually used with excessive signal ﬂow being input into it. The protective circuit is also activated when the set operating temperature is exceeded, which can happen if the vents on top of the ampliﬁer are covered, or if the ampliﬁer is installed on a cramped audio rack. In these cases, the MUTE indicator ﬂashes, and the volume is automatically reduced. Approximately 15 seconds later, the protective circuit is released, therefore the volume needs readjusting to continue normal use.

If the temperature does not sufficiently lower within a certain amount of time after the protective circuit activation, the power shuts OFF and the STANDBY indicator above the POWER ON/OFF button ﬂashes.

iN the eVeNt oF ampliFier trouBle

The protective circuit is activated and the power is automatically shut OFF if an abnormality is detected in the power circuit. The same happens if the main fuse inside the ampliﬁer blows. In these cases, the STANDBY indicator above the POWER ON/OFF button ﬂashes.

In cases as mentioned above, immediately disconnect the power cord, and contact the place of purchase, your nearest Marantz dealer, our customer service center, or our repair service center.

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PM8003 specifications

The Marantz PM8003 is an integrated amplifier that stands as a testament to the brand's commitment to high-quality audio performance and craftsmanship. Designed with both audiophiles and casual listeners in mind, this amplifier blends advanced technology with user-friendly features to provide an exceptional listening experience.

One of the standout features of the PM8003 is its robust power output. With a power rating of 70 watts per channel into 8 ohms, the amplifier is capable of driving a wide range of speakers, ensuring clarity and dynamic range across various listening volumes. This power is complemented by a toroidal transformer that minimizes electromagnetic interference and optimizes power delivery to the components.

The PM8003 incorporates Marantz's proprietary Current Feedback topology, which allows for rapid response to dynamic audio signals, delivering a more natural sound. This technology enhances the amplifier's ability to reproduce high frequencies with precision while maintaining a rich midrange and controlled bass response. Such characteristics contribute to an immersive soundstage, making it ideal for enjoying a variety of music genres.

In terms of versatility, the PM8003 features multiple inputs, including phono input for moving magnet cartridges. This allows vinyl enthusiasts to connect their turntables directly, enjoying the warmth and depth of analog sound. Additionally, there are multiple line-level inputs, enabling users to connect various digital and analog devices seamlessly.

The build quality of the PM8003 is another highlight. Constructed with a solid chassis that minimizes vibrations, the amplifier not only performs well but also looks elegant in any audio setup. The front panel is equipped with a large volume knob and source selectors that promote ease of use, catering to both advanced users and those new to high-fidelity audio.

Further enhancing its performance, the PM8003 features a high-quality headphone amplifier, allowing for a personal listening experience without compromising sound quality. The tone control and loudness features provide users with the ability to tailor the sound to their preferences.

In conclusion, the Marantz PM8003 integrates power, technology, and craftsmanship into one compelling package. Its combination of current feedback technology, robust design, and versatile connectivity make it an exceptional choice for anyone seeking high-quality audio in their home or listening space. Whether you're a seasoned audiophile or a newcomer to high-end sound, the PM8003 promises an enriching auditory experience.