JVC KD-R338/KD-R330 Installation and Connection Manual

Warnings and Precautions

WARNINGS / ADVERTENCIAS / AVERTISSEMENTS

General safety warnings are provided, emphasizing proper installation procedures, electrical connections, and potential hazards like short circuits and overheating.

PRECAUTIONS on power supply and speaker connections

DO NOT connect the speaker leads of the power cord to the car battery; otherwise, the unit will be seriously damaged.
BEFORE connecting the speaker leads of the power cord to the speakers, check the speaker wiring in your car.

Installation

In-dash Mounting

To install the unit in your vehicle's dashboard:

Use the appropriate installation kits for your car. Consult your JVC car audio dealer or a kit supplier if you have questions.
The unit requires a 12 V DC power supply with a negative ground.
Disconnect the car battery's negative terminal before making any electrical connections.
Connect speakers with a maximum power of more than 50 W (4 Ω to 8 Ω impedance). Adjust the <AMP GAIN> setting if necessary (refer to the main INSTRUCTIONS manual, page 12).
Insulate any unconnected wires with vinyl tape or similar material to prevent short circuits. Do not remove protective caps from unconnected wires or terminals.
If a fuse blows, first check for short circuits in the wiring, then replace the fuse with one of the same rating.
Install the unit in the vehicle's console.
Mount the unit so the mounting angle is 30° or less.
Ensure the unit is properly grounded to the car's chassis after installation.
After installation, verify that the car's brake lamps, blinkers, wipers, etc., are functioning correctly.
Be aware that metal parts of the unit, such as the heat sink and enclosure, can become hot during and shortly after use.

Part List

The following parts are typically included:

A Control panel
B Sleeve (for mounting)
C Trim plate (for finishing the dashboard opening)
D Power cord
E Handles (for securing the unit)

Note: Bracket, Pocket, and Flat head screws (M5 x 8 mm) are not supplied with this unit.

Removing the Unit

To remove the unit from the dashboard:

Release the rear section of the unit first.
Then, carefully pull the unit out of the mounting sleeve.

Electrical Connections

This section details the wiring required to connect the JVC KD-R338/KD-R330 to your vehicle's power and speaker system.

Power and Ground Connections

Connect the power cord (D) as follows:

Yellow wire: Connect to the vehicle's 12 V Battery terminal.
Red wire: Connect to the vehicle's 12 V Ignition Switch. If your vehicle's factory wiring harness does not have an "12V ignition switch" lead, connect this red wire to the vehicle fuse block via a separate red lead and fuse tap (sold separately).
Black wire: Connect securely to the vehicle's chassis (a clean, unpainted metal part) for grounding.

Speaker Connections

Connect the speaker wires from the unit to your vehicle's speakers. Ensure speakers have a minimum power handling of 50W and an impedance of 4 Ω to 8 Ω.

Front Left Speaker: Connect the unit's White wire to the positive (+) terminal of the front left speaker, and the White (black stripe) wire to the negative (-) terminal.
Front Right Speaker: Connect the unit's Gray wire to the positive (+) terminal of the front right speaker, and the Gray (black stripe) wire to the negative (-) terminal.
Rear Left Speaker: Connect the unit's Green wire to the positive (+) terminal of the rear left speaker, and the Green (black stripe) wire to the negative (-) terminal.
Rear Right Speaker: Connect the unit's Purple wire to the positive (+) terminal of the rear right speaker, and the Purple (black stripe) wire to the negative (-) terminal.

Other Connections

Blue (white stripe) wire: Connect to the power antenna lead or amplifier turn-on lead.
Blue wire: Connect to the automatic antenna control lead.
Orange (white stripe) wire: Connect to the vehicle's illumination circuit to dim the display when headlights are on.
Brown wire: Connect to the telephone muting lead for hands-free calling.
Purple (black stripe) wire: This is the remote lead, typically used for connecting to a JVC amplifier.
Signal cord: Used for connecting rear speakers or a subwoofer. Make the <L/O MODE> setting accordingly (refer to the main INSTRUCTIONS manual, page 11).

Wire Joining and Harnesses

To join wires:

Strip the ends of the leads.
Twist the ends together securely.
Solder the connection for reliability.
Cover the connection with vinyl tape or electrical tape.

If your vehicle's factory wiring harness is not compatible, you may need a vehicle-specific wiring harness adapter. These can be obtained from companies like Metra Electronics (www.metraonline.com) or Scosche Industries (www.scosche.com).

Connecting External Devices

Bluetooth Adapter or Portable Audio Player:

The JVC KS-BTA100 Bluetooth adapter (sold separately) can be connected for Bluetooth functionality.
A portable audio player can be connected using a 3.5 mm (1/8") stereo mini plug to the unit's AUX input.

Ensure the appropriate source selection (<SRC SELECT>) is made in the unit's settings (refer to the main INSTRUCTIONS manual, pages 9, 12, and 14).

Troubleshooting

Here are solutions for common issues:

Problem: The fuse blows.
Solution: Are the red and black leads connected correctly?
Problem: Power cannot be turned on.
Solution: Is the yellow lead connected to a 12V source? Is the red lead connected to the ignition switch or a fused accessory circuit?
Problem: No sound from the speakers.
Solution: Check if the speaker output leads are short-circuited. Ensure speaker wires are correctly connected to the speakers.
Problem: "MISWIRING CHK WIRING THEN RESET UNIT" or "WARNING CHK WIRING THEN RESET UNIT" appears on the display, and no operation is possible.
Solution: Check if any speaker output lead is short-circuited or touching the car chassis or head unit chassis. Reset the unit.
Problem: Sound is distorted.
Solution: Check if the speaker output leads are grounded. Ensure the negative terminals ("-") of left and right speakers are not commonly grounded if not intended.
Problem: Noise interferes with sounds.
Solution: Ensure the rear ground terminal is connected to the car's chassis using a short and thick cord.
Problem: This unit becomes hot.
Solution: This is normal if the unit is operating under heavy load or in high ambient temperatures. Ensure speaker output leads are not grounded and negative terminals are not commonly grounded.
Problem: This unit does not work at all.
Solution: Reset the unit.

For further assistance, refer to the main INSTRUCTIONS manual or contact JVC customer support.

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