User manual FENDER PRECISION BASS

[. . . ] The PRECISION BASS keyboard amplifier was designed to give years of reliable service under all conditions and is equipped with a unique implementation of our exclusive, defeatable DELTACOMPTM compressor system. When DELTACOMPTM is engaged, it is practically impossible to cause the power amplifier to clip (distort). With DELTACOMPTM, apparent compressor release time is kept short, yet waveform distortion is kept to a minimum at low frequencies. The selection of a Fender® amplifier will reward you with years of quality music in a wide range of sonic possibilities. [. . . ] This is very useful if the signal source is weak. CHANNEL 1 EFFECTS SEND CONTROL - This control works in conjunction with the effects send jack (item R), effects return jack (item S), and the effect return control (item J) to , respectively, allow a desired amount of preamp signal to be massaged, and to control the amount of return signal that has gone through an external effects device. The effects send control in conjunction with the effects send jack could be used to drive another PRECISION BASS as a slave amp. This is done by connecting the effects send jack, with a standard guitar cord, to the effects return jack of another PRECISION BASS. Note that each channel could be set to send a different amount of signal to the effects bus. CHANNEL 1 REVERB SEND CONTROL - This control works in conjunction with the reverb return control (item K) to allow the amount of reverb to be mixed with the dry signal. The amount of reverb-sent signal is independent for each channel. C. F, G. CHANNEL 2 AND 3 - These two channels are provided for two additional instruments. All the controls and jacks operate in the same manner as those in channel 1. When not in use, it is best to turn the channel volume, the effects send and the reverb send controls all the way down to avoid any amplification of unwanted noise. Likewise, when not in use, the equalizer sections should be kept flat ( i. e. POWER SWITCH - This switch turns the PRECISION BASS on or off. When the switch is off, the amplifier is completely shut down. J. K. PRECISION BASS REAR PANEL P, Q. LINE OUTPUT JACKS - Signal from each of the channels are combined with reverb and effects to form the input to the power amplifier stage. The Line Outs are wired from this point. The 1/4 Jack (Item P) and the XLR jack (Item Q) provide easy connection paths from the PRECISION BASS to any external devices, such as a slave amp or a mixer. It is also useful for recording live performances. Note that inserting a plug into one of the Line Outs jacks does not interrupt the normal internal signal flow of the PRECISION BASS. EFFECTS SEND JACK - This jack is the output of the effects bus, where all the channels Effects Send are combined. The signal coming out of this jack could be used to drive an effects device, a slave amp, or as an input to a mixer . Note that the signal coming out of this jack is reverb-free. EFFECTS RETURN JACK - This jack inputs signal to the master section of the PRECISION BASS through the Effects Return control (Item J). [. . . ] WARNING : THIS EQUIPMENT MUST BE EARTH GROUNDED. COVERING CARE - UNPLUG THE POWER CORD BEFORE CLEANING - The exclusive vinyl covering on your cabinet has been especially designed for years of lasting beauty. A very light, soapy solution on a sponge may be used to remove dirt and residue that may accumulate in the texture. Be careful as not to let any liquid get inside the chassis or contact the operating surfaces. S. T. PRECISION BASS BLOCK DIAGRAM Reverb Equalizer Channel 1 Volume Low Mid Hi Reverb Send Insert (Rear Panel) Effects Effects Send Effects Loop (Rear Panel) Main Channel 1 Balanced High Z Input Channel 2 Balanced High Z Input Effects Send Equalizer Channel 2 Volume Effects Return Low Mid Hi Reverb Send Insert (Rear Panel) Channel 3 Balanced High Z Input Effects Send Equalizer Channel 3 Volume Reverb Circuit Reverb Return Deltacomp Reverb Send Insert (Rear Panel) TM Low Mid Hi Master Volume Effects Send Power Amp Speakers Balanced Low Z Equalizer Channel 4 Volume Line Outputs Channel 4 Inputs Low Low Hi Hi Mid Mid Reverb Send Insert (Rear Panel) Effects Send Balanced High Z TROUBLESHOOTER`S CHECKLIST If the amplifier is set up but does not function, check the following items: · Is the amplifier power cord plugged into an electrical outlet ? [. . . ]