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Cheaper than buying a new radio!
is part of the manual is very useful for repairing
Here are circuit diagrams
if there is damage, I recommend using this part of the
a complete list of circuit boards and components
- SETTING THE UNIT
8. OPERATIONS AND SPECIFICATIONS
Cut Off Frequency Control Power Indicator
If the LPF/HPF select switch is set The power indicator lights when to LPF or HPF, you can select a cut the power is switched on. off
Adjusting the gain controls A and B will help match output of the car stereo to the Pioneer amplifier. Normally, set switch to the â€śNORMALâ€ť position. If the output is low, even when the volume of the car stereo is turned up, turn these controls clockwise. If there is distortion when volume of the car stereo is turned up, turn these controls counter-clockwise.
â€¢ If you only use one input plug, set
the gain controls for speaker outputs A and B to the same position.
â€¢ Set the gain control to â€śNORMALâ€ť
when this amplifier is connected to a Pioneer car stereo with RCA output jacks. If the sound level is too low or LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch distorts, adjust the gain control.
â€¢ Adjust gain control â€śMINâ€ť Set LPF/HPF select switch as follows according to the type of
side of â€śNORMALâ€ť when this amplithat is connected to speaker output connector and the fier is connected to a Pioneer car stereo system: stereo (High voltage output type).
RCA Input Select Switch
LPF/HPF Select Audio frequency range Speaker Remarks Switch to be output Type
LPF (left) * â€” 50 to 120 Hz Sub-woofer Connect a sub-woofer. HPF (right) * 50 120 Hz â€” Full range Use if you want to cut the very-low-frequency range* because it is not necessary for the speakers you are using. * See the â€śCut Off Frequency Controlâ€ť section.
For two-channel input, slide this OFF (center) Full range switch to the left. For four-channel input, slide this switch to the right.