Troubleshooting Guide; Specifications - Kenwood KAC-746 Instruction Manual

Troubleshooting guide

Often, what appears to be a malfunction is due to user error. Before
calling for service, please consult the following table.
Symptom
No sound.
(No sound from one side.)
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
Max Power Output (4 Ω)
4 Channel Mode ..........................................................................................................70 W
3 Channel Mode ....................................................................................70 W
2 Channel Mode ........................................................................................................200 W
Rated Power Output (4 Ω)
4 Channel Mode ..................................................................35 W
3 Channel Mode) ..................35 W
2 Channel Mode........................................................................100 W
Rated Power Output (2 Ω)
4 Channel Mode..........................................................................50 W
Frequency Response (+0, –1 dB) ............................................................................5 Hz ~ 50 kHz
Signal to Noise Ratio............................................................................................................100 dB
Sensitivity (MAX) (rated output) ............................................................................................0.15 V
Sensitivity (MIN) (rated output) ..............................................................................................4.0 V
Input Impedance....................................................................................................................10 kΩ
Low Pass Filter (12 dB/oct.) (Variable) ........................................................................50 ~ 200 Hz
High Pass Filter (12 dB/oct.) (Variable) ........................................................................50 ~ 200 Hz
General
Operating Voltage ..............................................................................14.4 V (11 ~ 16 V allowable)
Current Consumption (1 kHz, 10% THD) ................................................................................28 A
Dimensions (W H
Weight ..................................................................................................................................3.1 kg
Cause
• Input (or output) cables are
disconnected.
• Protection circuit may be
activated.
• The fuse may be blown
because the volume was too
high.
The input sensitivity adjusting
control is not set to the correct
position.
• The speakers cable are
connected with wrong + / -
polarity.
• A speaker cable is pinched by a
screw in the car body.
• The switches may be set
improperly.
2 (1 kHz, 0.08 % THD) + 100 W
D) ................................................................................290
Remedy
• Connect the input (or output)
cables.
• Check connections by referring
to "Protection function".
• Replace the fuse with a new
fuse and use a lower volume.
Adjust the control correctly
referring to "Controls".
• Connect them properly checking
the + / - of the terminals and
cables well.
• Connect the speaker cable again
so that it is not pinched by
anything.
• Set switches properly by
referring to "Controls" and
"System examples".
2 + 200 W
4 (DIN45324, +B=14.4 V)
1 (1 kHz, 0.8 % THD
2 (1 kHz, 0.8 % THD)
4 (1 kHz, 0.8 % THD)
52
4
1
2
230 mm
9