Audio Fix / setup help

Denon AVR-X3900H / Denon AVR-X2900H / Denon AVR-X1800H / Marantz CINEMA 50: force the already assigned analogue connector for an intended line-level source

Correct named input has an analogue line source, but INPUT MODE is currently HDMI/DIGITAL.

Manufacturer-documented Reviewed 2026-11-09 · Revision 1

When this guide applies

Only the explicitly listed models and their separately cited exact regional manuals. Correct named input has an analogue line source, but INPUT MODE is currently HDMI/DIGITAL.

Connection scope: Analog line / headphone audio. Symptom: Switching between devices isn’t working.

This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.

If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.

Checks and possible outcomes

Start at step-0. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

step-0

Is the intended line-level source already connected to the analogue jack assigned to this named input?

A raw cartridge, unknown mapping or missing cable stops here.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

If Yes, confirmed → Is this source not the TV Audio ARC/eARC input, whose mode is fixed?
If No → Stop at the unconfirmed condition
If I do not know / cannot check → A required fact is unknown

Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.North American AVR-X3900H only. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.European AVR-X2900H / DAB shared instructions. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X1800H official manual ↗PDF pages 1, 197 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09
Manufacturer-documented Marantz CINEMA 50 official manual ↗PDF pages 1, 144, 188 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09

step-1

Is this source not the TV Audio ARC/eARC input, whose mode is fixed?

Do not remove TV return assignments to fit a procedure.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

If Yes, confirmed → Is INPUT MODE explicitly HDMI or DIGITAL while the analogue connector is wanted?
If No → Stop at the unconfirmed condition
If I do not know / cannot check → A required fact is unknown

Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.North American AVR-X3900H only. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.European AVR-X2900H / DAB shared instructions. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X1800H official manual ↗PDF pages 1, 197 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09
Manufacturer-documented Marantz CINEMA 50 official manual ↗PDF pages 1, 144, 188 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09

step-2

Is INPUT MODE explicitly HDMI or DIGITAL while the analogue connector is wanted?

Do not change an already correct or unknown setting.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

If Yes, confirmed → May the connector type change with listening paused and levels initially low?
If No → Stop at the unconfirmed condition
If I do not know / cannot check → A required fact is unknown

Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.North American AVR-X3900H only. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.European AVR-X2900H / DAB shared instructions. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X1800H official manual ↗PDF pages 1, 197 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09
Manufacturer-documented Marantz CINEMA 50 official manual ↗PDF pages 1, 144, 188 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09

step-3

May the connector type change with listening paused and levels initially low?

The previously forced digital source will stop; retain its setting.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

If Yes, confirmed → Set only Inputs > Input Assign > INPUT MODE for this source to ANALOG
If No → Stop at the unconfirmed condition
If I do not know / cannot check → A required fact is unknown

Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.North American AVR-X3900H only. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.European AVR-X2900H / DAB shared instructions. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X1800H official manual ↗PDF pages 1, 197 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09
Manufacturer-documented Marantz CINEMA 50 official manual ↗PDF pages 1, 144, 188 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09

step-4

Set only Inputs > Input Assign > INPUT MODE for this source to ANALOG

Do not alter physical assignments, Set Defaults or HDMI Audio Out.

Look for: Perform only the stated operation, then confirm it was possible.

If I completed this → Does the intended analogue programme now play?
If I could not do this → Stop at the unconfirmed condition
If I do not know / cannot check → A required fact is unknown

Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.North American AVR-X3900H only. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.European AVR-X2900H / DAB shared instructions. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X1800H official manual ↗PDF pages 1, 197 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09
Manufacturer-documented Marantz CINEMA 50 official manual ↗PDF pages 1, 144, 188 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09

step-5

Does the intended analogue programme now play?

Choosing a connector does not verify the source output voltage or repair a cable.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

If Yes, confirmed → Checks completed — report the actual result
If No → Stop at the unconfirmed condition
If I do not know / cannot check → A required fact is unknown

Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.North American AVR-X3900H only. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 200, 201 — INPUT MODE is per source: HDMI, DIGITAL or ANALOG force that connector type, while AUTO detects. Input Assign separately maps physical connectors; TV Audio return is fixed to ARC/eARC in that setup.European AVR-X2900H / DAB shared instructions. Existing line-level analogue route, not a turntable raw cartridge or output destination. · Source checked 2026-11-09
Manufacturer-documented Denon AVR-X1800H official manual ↗PDF pages 1, 197 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09
Manufacturer-documented Marantz CINEMA 50 official manual ↗PDF pages 1, 144, 188 — INPUT MODE ANALOG forces the assigned analogue connector; HDMI/DIGITAL force other signal types. TV Audio return mode is fixed to ARC/eARC.Exact EU model verified from its model-specific manual download index and internal model identity; only this independently read common control is shared. No regional tuner, connector count, default state or firmware cure assumed. · Source checked 2026-11-09

Possible result

Checks completed — report the actual result

Completion does not automatically mean the problem is solved. Report what actually happened; no physical test or measured repair is claimed.

steps completed

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

Possible result

Stop at the unconfirmed condition

A required setup or response was not confirmed. Retain the actual observation and consult the exact source/partner manual or official support. Do not escalate to a reset, update installation, internal repair or unsafe wiring change.

next support

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

Possible result

A required fact is unknown

Confirm the actual model, connection, partner capability and state before continuing. Do not guess a menu, interrupt an installation or modify a live source by trial and error.

insufficient data

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

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