YAMAHA A-1020 (01) PDF MANUAL

The serial number is located on the rear of the chassis.

Read all safety and operating instructions before use.

Retain instructions for future reference.

Heed all warnings on the appliance and in the instructions.

Follow all operating and other instructions.

Do not use the appliance near water (e.g., bathtub, washbowl, kitchen sink, laundry tub, wet basement, swimming pool).

Use only with a recommended cart or stand.

Mount to a wall or ceiling only as recommended.

Ensure proper ventilation; do not block ventilation openings by placing on a bed, sofa, rug, or similar surface, or in a built-in installation like a bookcase or cabinet.

Situate away from heat sources like radiators, stoves, or other heat-producing appliances.

Connect only to the power supply type described in the instructions or marked on the appliance.

Route power cords to avoid being walked on or pinched, especially at plugs, receptacles, and exit points.

Clean only as recommended by the manufacturer.

Unplug the power cord when unused for long periods.

Prevent objects from falling and liquids from spilling into the appliance.

Refer servicing to qualified personnel if the power cord/plug is damaged, objects have fallen/liquid spilled in, it’s been exposed to rain, it doesn’t operate normally or performance changes markedly, or it has been dropped/cabinet damaged.

Do not attempt service beyond what’s described in the operating instructions; refer all other servicing to qualified personnel.

Read the owner’s manual carefully to ensure proper operation.

Choose the installation location carefully. Avoid direct sunlight, heat sources, vibration, excessive dust, heat, cold, or moisture. Keep away from sources of hum like transformers or motors.

Do not open the cabinet to avoid damage or electrical shock. Contact your dealer if a foreign object gets inside.

Do not block ventilation holes by placing objects on top of the amplifier, as this can cause internal temperature rise and failure.

When removing the power plug, always pull the plug directly, never yank the cord.

Do not use force when operating switches and knobs.

When moving the amplifier, first pull out the power plug and remove cords connecting to other equipment.

Always set the volume control to “∞” (minimum) when lowering the tonearm to play a record, then turn the volume up after the stylus is seated.

Do not clean with chemical solvents; use a clean, dry cloth.

Consult the “Troubleshooting” section before assuming the amplifier is faulty.

Keep the manual in a safe place for future reference.

Do not connect audio equipment to the rear panel AC outlets if it requires more power than the outlets are rated for.

Turn off all equipment before making any connections.

Ensure you connect the left (L) and right (R) channels consistently from component to component.

Position all cords as far apart from each other as possible to avoid undesirable interactions.

Make sure the system is installed in a location with adequate ventilation.

Refer to the connection diagram for proper connections.

The matching impedance for this amplifier is 6Ω.

You can connect up to three pairs of speakers (A, B, C).

Speakers A are in parallel with B and/or C. Speakers B and C are in series with each other.

Connection options and minimum impedances:

(1) One pair (A, B, or C): 4 ohms minimum per speaker.

(2) Two pairs in parallel (A+B or A+C): 8 ohms minimum per speaker.

(3) Two pairs in series (B+C): 2 ohms minimum per speaker.

(4) Three pairs (A+B+C): 8 ohms minimum for A, 4 ohms minimum for B and C.

Do not use speakers with lower impedance than recommended.

Connect the left speaker cords to the L terminals and right speaker cords to the R terminals, observing the “+” and “-” polarity markings. Incorrect polarity results in unnatural sound and lack of bass.

Keep speaker cords as short as possible; do not coil excess wire. Do not bundle speaker cords with cords from other system components.

Strip about 1cm of insulation from the speaker cord ends.

Loosen the speaker terminal knobs (Red for +, Black for -).

Insert the exposed wire into the hole.

Tighten the speaker terminal knobs securely.

Note: When using only B or only C speaker terminals, the unused terminals (C or B respectively) must be turned OFF using the front panel speaker selector switch. If the unused terminal pair is left ON, no sound will be heard from the active pair.

Use the Phono 1 jacks for either MM (Moving Magnet) or MC (Moving Coil) cartridges. Set the front panel Phono Selector switch to match the cartridge type.

Use the Phono 2 jacks for MM cartridges only. Cartridge load impedance can be selected for MM cartridges via the Phono Selector switch.

Plug the turntable’s output cords into the appropriate Phono jacks (L to L, R to R).

Connect the turntable’s ground wire to the Gnd (Ground) terminal on the amplifier. Normally, this minimizes hum, but try disconnecting it if hum persists or worsens.

Position the turntable’s output cords and the cartridge away from hum sources like power cords or transformers.

Connect cords from the tuner’s output jacks to the Tuner input jacks on the amplifier (L to L, R to R).

Position the tuner so its AM antenna is well away from the amplifier to minimize potential radio frequency noise interference from the amplifier’s power supply.

Connect the output jacks of the additional equipment (e.g., CD player, second tuner) to the CD or AUX input jacks on the amplifier (L to L, R to R).

Note: A turntable cannot be connected to the CD jacks as they lack RIAA equalization.

Connect the tape deck’s Line In (Record) jacks to the amplifier’s Tape 1 Rec Out jacks (L to L, R to R).

Connect the tape deck’s Line Out (Play) jacks to the amplifier’s Tape 1 Tape PB (Playback) jacks (L to L, R to R).

A second tape deck can be connected similarly using the Tape 2 jacks.

The A-1020 provides 3 AC outlets: 2 switched and 1 unswitched.

Do not connect appliances totaling more than 100 watts to the 2 switched outlets combined.

Do not connect appliances totaling more than 200 watts to the 1 unswitched outlet.

The Accessory Jacks allow connecting a signal processor (like an equalizer) into the signal path before the tone controls.

When using the jacks, first pull out the jumper bars connecting the Send and Receive terminals.

Connect the Accessory Send terminals on the amplifier to the inputs of your processor.

Connect the outputs of your processor to the Accessory Receive terminals on the amplifier.

When not using an external processor, leave the jumper bars in place.

This is a “push-on, push-off” switch.

When pushed on, the indicator lamp for the selected input source lights up.

Before turning power on, set the Volume control to its lowest position (∞) to prevent loud power-on noise.

There will be a delay of several seconds before sound is heard from the speakers due to the speaker protection circuit activating.

These switches (A, B, C) select which connected speaker pairs are active.

The following table shows the switch settings for different speaker configurations:

When listening through headphones only, turn all speaker switches (A, B, and C) to the OFF position.

Remember: If using only B or only C speakers, ensure the switch for the unused pair (C or B) is OFF, otherwise no sound will be heard.

Auto Class A provides low-distortion Class A amplification for lower output levels (most listening situations) and automatically shifts to Class AB amplification for higher output levels.

Set the switch to ON (left indicator lights up) to enable Auto Class A operation.

Set the switch to OFF for standard Class AB operation only.

Note: Class A operation generates more heat than Class AB, even with no signal. Ensure adequate ventilation when using Auto Class A mode.

Pressing this switch (right indicator lights up) bypasses the Bass and Treble tone control circuitry. The signal path is shortened, passing only through the DC flat amp, DC power amp (and phono equalizer if Phono is selected).

This minimizes the influence of amplifier circuitry for potentially higher fidelity sound reproduction.

When Tone Bypass is ON, the Bass and Treble controls have no effect.

Turn Tone Bypass OFF if you wish to use the Bass or Treble controls.

It can also be used to quickly check the total effect of your tone control settings by toggling it on and off.

Press the button corresponding to the program source you wish to listen to (e.g., PHONO, CD, TUNER, AUX, TAPE 1, TAPE 2).

Pressing this switch (left indicator lights up) lowers the volume level by 20dB without changing the main Volume control setting.

Press it again to restore the original volume.

This is useful for temporarily lowering the volume (e.g., to answer a phone call) or for making finer volume adjustments at low listening levels.

Caution: Turning the Muting switch off when the main Volume control is set very high could result in excessively loud sound that might damage your speakers.

Turn the VOLUME control knob clockwise to increase the overall sound level and counter-clockwise to decrease it.

Plug your headphones into the PHONES jack on the front panel. Ensure the L and R markings on the headphones correspond to the correct ears.

If you want to listen only through headphones, set all Speaker Selection switches (A, B, C) to the OFF position.

These controls adjust the low (Bass) and high (Treble) frequency response. The center “DEFEAT” position provides a flat response.

Each control has a selectable turnover frequency:

Bass: 125 Hz or 500 Hz. Using 500 Hz creates a bolder change; 125 Hz provides a subtler effect.

Treble: 2.5 kHz or 8 kHz. Using 2.5 kHz creates a more pronounced change; 8 kHz provides a more delicate effect.

Note: These controls are inactive when the TONE BYPASS switch is ON.

The continuously variable Loudness control compensates for the ear’s reduced sensitivity to low and high frequencies at low listening volumes.

1. Set the Loudness control to the FLAT position.

2. Adjust the main VOLUME control to the loudest level you anticipate listening at.

3. To listen at lower levels, turn the Loudness control counter-clockwise. This will reduce the overall volume while progressively boosting the extreme low and high frequencies to maintain a natural perceived tonal balance.

SUBSONIC FILTER: Set this switch to 15Hz to cut ultra-low frequencies caused by turntable rumble or warped records. This prevents wasted amplifier power and potential speaker damage without significantly affecting audible sound. It helps prevent large woofer cone movements (cone instability) caused by subsonic frequencies.

HIGH FILTER: Set this switch to 10kHz to remove high-frequency noise like tape hiss or record surface noise above 10 kHz. It has minimal effect on the desired audio signal but is best left OFF when not needed.

Set the Filter switch to OFF when filters are not required.

This switch selects between STEREO and MONO operation. Normally, it should be set to STEREO.

The REC OUT SELECTOR determines which audio source is sent to the TAPE 1 and TAPE 2 REC OUT jacks for recording, independently of the source selected for listening with the INPUT SELECTOR.

Set the REC OUT SELECTOR to the source you wish to record (PHONO, CD, TUNER, AUX).

To monitor the source while recording, set the INPUT SELECTOR to the same source.

To listen to a different source while recording, set the INPUT SELECTOR to that other source.

If your tape deck has 3-head monitoring capability, you can monitor the recording directly from the tape by setting the INPUT SELECTOR to the corresponding Tape input (TAPE 1 or TAPE 2) while recording.

Yes. Set the REC OUT SELECTOR to the source you want to record. Set the INPUT SELECTOR to the source you want to listen to.

Example: To listen to a record (Phono) while recording an FM broadcast (Tuner):

1. Set REC OUT SELECTOR to TUNER.

2. Set INPUT SELECTOR to PHONO.

To dub from Tape Deck 1 (connected to TAPE 1 jacks) to Tape Deck 2 (connected to TAPE 2 jacks):

1. Set the REC OUT SELECTOR to TAPE COPY 1 ► 2.

2. Set Tape Deck 1 to Play.

3. Set Tape Deck 2 to Record.

To dub from Tape Deck 2 to Tape Deck 1:

1. Set the REC OUT SELECTOR to TAPE COPY 2 ► 1.

2. Set Tape Deck 2 to Play.

3. Set Tape Deck 1 to Record.

The PHONO SELECTOR sets the amplifier to match the turntable and cartridge connected to the PHONO 1 or PHONO 2 inputs.

For PHONO 1 input:

• If using a low-output Moving Coil (MC) cartridge: Select either MC 10kΩ or MC 100Ω, choosing the impedance setting closest to your cartridge’s rated impedance.

• If using a Moving Magnet (MM), Induced Magnet (IM), or Moving Iron (MI) cartridge: Select MM 47kΩ/220pF.

Caution: Selecting MC when an MM cartridge is connected will cause a sudden volume change and could harm speakers.

For PHONO 2 input (MM type cartridges only):

• Select 2/MM 47kΩ/220pF or 2/MM 47kΩ/330pF based on your MM cartridge’s requirements for load capacitance.

• Select 2/MM 100Ω for high-output MC cartridges connected to the Phono 2 input.

Switching between the different MM load impedance settings will alter the frequency response.

The hinged panel covers less frequently used controls for a cleaner look. To open the panel, push the panel section lightly.

Cause: The power plug is not securely plugged in.

Cure: Plug it in securely.

Cause: A fuse is blown.

Cure: Consult a service engineer.

Cause: The Speakers switch is not set correctly.

Cure: Set the Speakers switch correctly.

Cause: The input cords are not connected securely.

Cure: Connect them securely.

Cause: The speaker system is not connected correctly.

Cure: Check and secure connections.

Cause: The speaker connections are not secure.

Cure: Secure the connections.

Cause: The Balance control is set all the way to the left or right.

Cure: Adjust the Balance control correctly.

Cause: The + and – cords have been reversed at the amp or the speakers.

Cure: Connect the speaker wires in the correct phase (+ and -).

Cause: The input cords are not connected securely.

Cure: Plug the input cords in securely.

Cause: The turntable’s ground wire is not connected.

Cure: Connect the ground wire.

Cause: The output of the MC cartridge is connected to the Phono 2 terminal.

Cure: Connect it to the Phono 1 terminal.

Cause: The Phono Selector switch is set to MM.

Cure: Set the Phono Selector switch to MC.

Cause: The turntable and the speakers are too close together or the turntable is not mounted on a firm surface.

Cure: Change the location of the turntable or the speakers.

Cause: A transmitter is located nearby.

Cure: Consult a service engineer. Consult with the company that is transmitting.

Cause: The Tone Bypass switch is on.

Cure: The Tone Bypass switch must be turned off to use the tone controls.

Cause: The Muting switch is on.

Cure: Turn the Muting switch off.

Cause: Driving speakers outside the rated impedance range at high power for an extended period has activated the speaker protection circuit.

Cure: Turning the A-1020 off and then on will reset the speaker protection circuit. Use speakers inside the rated impedance range.

Cause: There is a malfunction in the amplifier.

Cure: Consult your Yamaha dealer.