User manual JVC 4VR-5446 schematic

[. . . ] X Y Bracket (I) Bracket (I) Spacer Spacer Bracket (L) Bracket (L) For safety. . . . • Do not raise the volume level too much, as this will block outside sounds, making driving dangerous. • Stop the car before performing any complicated operations. CAUTIONS AND NOTES This unit is designed to operate on 12 V DC, NEGATIVE ground electrical systems. • This unit uses BTL (Balanced Transformerless) amplifier circuitry, i. e. , floating ground system, so comply with the following: Do not connect the “·” terminals of the speakers to each other. Do not connect the “·” terminals of the speakers to the metal body or chassis. [. . . ] • Connect the RCA pin cords to the INPUT jacks. • Confirm the speaker wirings (See “SPEAKER CONNECTIONS” on page 2). Control cover Status lamp The lamp normally lights in blue while the unit is turned on. • When the lamp does not light • When the lamp lights in red • When the lamp lights in violet frequently – It indicates there may be a problem. See “TROUBLESHOOTING” on the right column. Input LEVEL controller The input level can be adjusted with this control when this unit is connected to other source equipment. Adjust the level while listening to the sound. This control is preset to MIN when the unit is shipped. LPF (Low-Pass Filter) controller Adjust the cutoff frequency (the Low-Pass Filter transmits frequencies lower than the cutoff frequency) within the range of 50 Hz to 300 Hz. Adjust the level while listening to the sound. This control is preset to 50 Hz when the unit is shipped. PHASE switch Select either normal (NOM) or reverse (REV), whichever reproduces a better sound. If you have any questions or require information regarding installation kits, consult your “JVC IN-CAR ENTERTAINMENT” car audio dealer or a company supplying the kits. Mount this unit on a firm surface, such as in the trunk or under the front seat. • Since heat is generated in the unit, do not mount it near inflammable objects. In addition, mount it in an area that will not prevent the unit from dissipating the heat. • Do not mount the unit in the places subject to heat: near a radiator, in a glove compartment or in insulated areas such as under a car mat that will prevent the unit from dissipating heat. • When mounting the unit under the front seat, make sure that adjusting the seat position will not catch any wire of the unit. (To an accessory terminal) Remote turn-on line Ignition switch Car battery JVC car receiver, etc. CAUTION To prevent short circuits while making connections, keep the battery’s negative terminal disconnected. 1 Remote turn-on line (not included with this unit) a When you use a JVC car receiver with a remote lead, connect to the remote lead. b When you connect a unit without a remote lead, connect to the accessory circuit of the car which is activated by the ignition switch. In this case, noise may occur when the car receiver is turned on or off. To avoid this noise, do not turn on or off the car receiver itself. You can turn on or off the car receiver along with the on/off operation of the ignition switch. [. . . ] Adjust the level while listening to the sound. This control is preset to MIN when the unit is shipped. LPF (Low-Pass Filter) controller Adjust the cutoff frequency (the Low-Pass Filter transmits frequencies lower than the cutoff frequency) within the range of 50 Hz to 300 Hz. Adjust the level while listening to the sound. [. . . ]