PIONEER GM-7200M
Service Manual

Setting the Unit
LPF (Low-Pass-Filter) Cut Off Frequency Control
You can select a cut off frequency from 40 to 240 Hz.

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BFC (Beat Frequency Control) Switch
If you hear a beat while listening to an AM broadcast with your car stereo, change the BFC switch using a small standard tip screwdriver.

Connecting the Unit
CAUTION

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Connection Diagram
� Make sure that wires will not interfere with moving parts of the vehicle, such as the gearshift, handbrake or seat sliding mechanism. � Do not shorten any wires. Otherwise the protection circuit may fail to work when it should. � Never feed power to other equipment by cutting the insulation of the power supply wire to tap from the wire. The current capacity of the wire will be exceeded, causing overheating. � Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns. Connecting wire with RCA pin plugs (sold separately). Fuse (30 A) Special red battery wire [RD-223] (sold separately) After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Fuse (30 A) Ground wire (black) [RD-223] (sold separately) Connect to metal body or chassis.

Connecting the Power Terminal
� Always use the special red battery and ground wire [RD-223], which is sold separately. Connect the battery wire directly to the car battery positive terminal (+) and the ground wire to the car body.

� Disconnect the negative (�) terminal of the battery to avoid the risk of short-circuit and damage to the unit. � Secure the wiring with cable clamps or adhesive tape. To protect the wiring, wrap adhesive tape around it where they lie against metal parts. � Do not route wires where they will get hot, for example where the heater will blow over them. If the insulation heats up, it may become damaged, resulting in a short-circuit through the vehicle body.

WARNING
Failure to securely fasten the battery wire to the terminal using the terminal screws could cause the terminal area to overheat and could result in damage and injury including minor burns.

Grommet

1. Pass the battery wire from the engine compartment to the interior of the vehicle.
� After making all other connections to the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Engine Fuse (30 A) compart- Interior of ment the vehicle

Connecting the Speaker Terminals
1. Expose the end of the speaker wires using nippers or a cutter by about 10 mm (3/8 in.) and twist. 2. Attach lugs to speaker wire ends. Lugs not supplied.
� Use pliers, etc., to crimp lugs to wires.

Gain Control
If the sound level is too low, even when the volume of the car stereo used along with this power amplifier is turned up, turn gain control on the front of the power amplifier clockwise. If the sound distorts when the volume is turned up, turn the gain control counterclockwise.
� When using with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL position. When using with an RCA equipped Pioneer car stereo with max. output of 4 V or more, adjust level to match the car stereo output level. � If you hear too much noise when using the speaker input terminals, turn the gain control counter-clockwise.

CAUTION: To prevent damage and/or injury
� Do not ground the speaker wire directly or connect a negative (�) lead wire for several speakers. � This unit is for vehicles with a 12-volt battery and negative grounding. Before installing it in a recreational vehicle, truck or bus, check the battery voltage. � If the car stereo is kept on for a long time while the engine is at rest or idling, the battery may go dead. Turn the car stereo off when the engine is at rest or idling. � If the system remote control wire of the amplifier is connected to the power terminal through the ignition switch (12 V DC), the amplifier will always be on when the ignition is on� regardless of whether the car stereo is on or off. Because of this, the battery could go dead if the engine is at rest or idling. � Connect a subwoofer with a 290 W or larger nominal input and an impedance between 2 and 8 ohms to the amplifier. If the nominal input and impedance are out of the above ranges, the subwoofer may catch fire, emit smoke or become damaged. � Install and route the separately sold battery wire as far away as possible from the speaker wires. Install and route the separately sold battery wire, ground wire, speaker wires and the amplifier as far away as possible from the antenna, antenna cable and tuner. � Cords for this product and those for other products may be different colors even if they have the same function. When connecting this product to another product, refer to the supplied Installation manuals of both products and connect cords that have the same function. Car stereo with RCA output jacks External Output (Subwoofer output) Front side

Fuse (30 A) Positive terminal

Drill a 14 mm (1/2 in.) hole Insert the O-ring rubber into the vehicle grommet into the vehicle body. body.

3. Connect the speaker wires to the speaker terminals.
� Fix the speaker wires securely with the terminal screws. Terminal screw

2. Twist the battery wire, ground wire and system remote control wire. 3. Attach lugs to wire ends. Lugs not supplied.
� Use pliers, etc., to crimp lugs to wires. RCA input jack Speaker input terminal See the �Using the Speaker Input� section. Speaker terminal

4. Connect the wires to the terminal.
� Fix the wires securely with the terminal screws. GND terminal Power terminal System remote control terminal

Speaker wire

Back side

Fuse (30 A) � 2

Bass Boost Control Switch
You can select a bass boost level from 0, 6 and 12 dB.
Speaker terminal System remote control wire (sold separately) Connect the male terminal of this wire to the system remote control terminal of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch. Battery wire See the �Connecting the Speaker Wires� section for speaker connection instructions.

System remote control wire Ground wire

Power Indicator
The power indicator lights when the power is switched on.