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Resumen del manual
To alleviate the problem, change the orientation of this unit; or move it farther away from the source of interference. • This device may interfere with radio and television reception. Do not use this device in the vicinity of such receivers. • Do not expose the unit to direct sunl ight, place it near devices that radiate heat, leave it inside an enclosed vehicle, or otherwise subject it to temperature extremes. Excessive heat can deform or discolor the unit. Maintenance • For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth. • Never use benzene, thinners, alcohol or solvents of any kind, to avoid the possibility of discoloration and/or deformation. Additional Precautions • Use a reasonable amount of care when using the unit's buttons, si iders, or other controls; and when using its jacks and connectors. Rough handling can lead to malfunctions. • When connecting/disconnecting all cables, grasp the connector itself—never pull on the cable. This way you will avoid causing shorts, or damage to the cable's internal elements. • A small amount of heat will radiate from the unit during normal operation. • To avoid disturbing your neighbors, try to keep the unit's volume at reasonable levels. You may prefer to use headphones, so you do not need to be concerned about those around you (especially when it is late at night). • When you need to transport the unit, package it in the box (including padding) that itcame in, if possible. Otherwise, you will need to use equivalent packaging materials. Panel Descriptions < Front Panel > 1. INPUT Jacks Two input jacks are provided. For a guitar with a standard output, use the "HIGF-I" input. For very high output instruments, use the "LOW" input. 2. DISTORTION Knob Clockwise rotation will intensify the distortion effect. "OFF" turns the effect off. 3. VOLUME Knob Clockwise rotation will increase the amplifier's overall volume. 4. HI-TREBLE Control Knob Clockwise rotation will boost the high frequencies. 4 5. TREBLE Control Knob Clockwise rotation will boost the higher frequencies. 6. MIDDLE Control Knob Clockwise rotation will boost the all-important middle frequencies. 7. BASS Control Knob Clockwise rotation will boost the lower frequencies. 8. REVERB Knob Clockwise rotation will intensify the reverb effect. 9. RATE Knob This knob adjusts the rate (frequency of the sound vibrations) of the chorus effect. Clockwise rotation increases the chorus speed. 10. DEPTH Knob This knob adjusts the depth of the chorus effect. Clockwise rotation deepens the chorus effect. 11. CHORUS Switch This knob selects the Chorus effect mode (FIXED/OFF/MANUAL). When it is settothe "OFF" position neither effect will be obtained. * Neither the speed nor depth of the FIXED mode can be changed. 12. Pilot Lamp This will light when the amplifier is switched on. 13. POWER Switch This switch turns the amplifier on and off. 14. EFFECT LOOP SEND Jack This is the jack from which the dry (unprocessed) signal is sent to the effects device. 15. EFFECT LOOP RETURN Jacks Theseare input jacks forthe return signal from youreffects device. Stereo connections (L/R) are possible. To use the unit in mono, use the L (MONO) jack only. * Before you make connections to the RETURN jack(s), be sure to switch the units off. 16. LINE OUT Jacks Use these jacks to connect the JC-90 to another guitar amplifier or mixer, or to a tape deck for recording. A stereo pair (L/R) is provided, but mono connections are also possible (use the L (MONO) jack). 17. FOOT SWITCH Jacks With the proper foot switch connected to the appropriate jack, you can obtain on/off control of Chorus, Reverb and/or Distortion. * Even when a foot switch is turned on, no effect will be obtained if knobs 2 and 11 are "OFF" positions. 18. PHONES Jack Connect headphones to this jack. When headphones are connected, no sound will be output through the internal speakers. 5 Connections To prevent malfunction and/or damage to speakers or other devices, always turn down the volume, and turn off the power on all devices before making any connections. LINE OUT Jacks ▼ ▼ EFFECT LOOP Jacks Line In О I-1 a . 1 -, 1=1 П к3