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Troubleshooting Guide; Specifications - Kenwood KAC-8402 Instruction Manual

4/3/2 channel power amplifier
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Troubleshooting Guide

What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. Before calling service, first check the following
table for possible problems.
PROBLEM
No sound.
(No sound from one side.)
(Blown fuse.)
The output level is too small
(or too large).
The sound quality is bad.
(The sound is distorted.)

Specifications

Specifications subject to change without notice.
Audio Section ............................................................................................................................................ KAC-8452 KAC-8402
Max Power Output ....................................................................................................................................................................................................................... 800 W 720 W
Rated Power Output (+B = 14.4 V)
Normal (4 Ω) (20 Hz – 20 kHz, 0.08 % THD) ................................................................................................................................................ 70 W × 4 60 W × 4
Normal
(4 Ω) (DIN : 45324 , +B = 14.4V) ....................................................................................................................................................... 70 W × 4 60 W × 4
Normal
(2 Ω) (1 kHz, 0.8 % THD) .....................................................................................................................................................................100 W × 4 90 W × 4
Bridged (4 Ω) (1 kHz, 0.8 % THD) ....................................................................................................................................................................200 W × 2 180 W × 2
Frequency Response (+0, –3 dB) ...........................................................................................................................................................................5 Hz – 50 kHz 5 Hz – 50 kHz
Sensitivity (rated output) (MAX.) ............................................................................................................................................................................................. 0.2 V 0.2 V
Sensitivity (rated output)
(MIN.) .............................................................................................................................................................................................. 5.0 V 5.0 V
Input Impedance ............................................................................................................................................................................................................................ 10 kΩ 10 kΩ
Signal to Noise Ratio ............................................................................................................................................................................................................... ≤100 dB ≤100 dB
Low Pass Filter Frequency (18 dB/oct.) (B channel) .................................................................................................................. 50 – 200 Hz (variable) 50 – 200 Hz (variable)
High Pass Filter Frequency (12 dB/oct.) ........................................................................................................................................... 50 – 200 Hz (variable) 50 – 200 Hz (variable)
Bass Boost Circuit (90 Hz) (B channel) .................................................................................................................................................................................+6 dB +6 dB
General ...................................................................................................................................................... KAC-8452 KAC-8402
Operating Voltage ........................................................................................................................................................................... 14.4 V (11 – 16 V allowable) 14.4 V (11 – 16 V allowable)
Current Consumption .....................................................................................................................................................................................................................40 A 40 A
Installation Size (W × H × D) ..................................................................................................................................................................... 380 × 61 × 286 mm 380 × 61 × 286 mm
.......................................................................................................................................................................................................
Weight .............................................................................................................................................................................................................................5.8 kg (12.8 lbs) 5.8 kg (12.8 lbs)
CEA-2006 ................................................................................................................................................... KAC-8452 KAC-8402
RMS Watts per channel @ 4 ohms < 1 % THD+N ................................................................................................................................................... 70 W × 4 60 W × 4
RMS Watts per channel @ 2 ohms < 1 % THD+N .................................................................................................................................................100 W × 4 90 W × 4
POSSIBLE CAUSE
• Input (or output) cables are disconnected.
• Protection circuit may be activated.
• Volume is too high.
• The speaker cord is shorted.
• The input sensitivity adjusting control is not set to the correct
position.
• The speakers wire are connected with wrong + /-polarity.
• A speaker wire is pinched by a screw in the car body.
• The switches may be set improperly.
SOLUTION
• Connect the input (or output) cables.
• Check connections by referring to <Protection function>.
• Replace the fuse and use lower volume.
• After check the speaker cord and fixing the cause of the short,
replace the fuse.
• Adjust the control correctly referring to <Controls>.
• Connect them properly checking the + / - of the terminals
and wires well.
• Connect the speaker wire again so that it is not pinched by
anything.
• Set switches properly by referring to <System examples>.
15 × 2-3/8 × 11-5/16 inch 15 × 2-3/8 × 11-5/16 inch
English
7

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