Sony XM-752EQX - Manuel (Page 14)

Troubleshooting Guide
The following checklist will assist in the correction of most problems which you may encounter with your
unit.
Before going through the checklist below, refer to the coimection and operating procedures.
Problem CausefSolution
The POWER/PROTECTOR
indicator does not light up. The fuse is blown. —► Replace the fuse with a new one.
The ground lead is not securely cormected. —♦ Fasten the ground lead
securely to a metal surface of the car.
The voltage going into the remote terminal is too low.
• The connected master unit is not turned on. — ♦ Turn on the master vmit.
• The system employs too many amplifiers. —► Use a relay.
Check the battery voltage (10.5 - 16 V).
The OVER CURRENT indicator lights
up in red.
Turn off the power switch. The speaker outputs are short-circuited. —►
Rectify the cause of the short-circuit.
The OFFSET indicator lights up in red. Turn off the power switch. Make sure the speaker cord and ground lead
are securely connected.
The THERMAL indicator lights up in
red. The unit heats up abnormally.
• Use speakers with suitable impedance.
• Make sure to place the unit in a well ventilated location.
Alternator noise is heard. The power connecting leads are installed too close to the RCA pin cords.
—► Keep the leads away from the cords.
The ground lead is not securely connected. —► Fasten the ground lead
securely to a metal point of the car.
Negative speaker leads are touching the car chassis. —► Keep the leads
away from the car chassis.
The sound is muffled. The FILTER selector switch is set to the "LPF" position.
The sound is too low. The LEVEL adjustment control is set to the "MIN" position.
HPF, LPF, and EQUAUZER does not
work.
The DIRECT switch is set to ON.
Specifications
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
75 watts per channel minimum continuous average power into
4 ohms, both channels driven from 20 Hz to 20 kHz with no more
than 0.04% total harmonic distortion per Car Audio Ad Hoc
Committee standards,
other Specifications
Circuit system OTL (output transformerless)
circuit
•Pulse power supply
Inputs RCA pin jacks
High level input cormector
Outputs Speaker terminals
Through out pin jacks
Speaker impedance
2 - 8 Q (stereo)
4 - 8 Q (when used as a bridging
amplifier)
Maximum outputs
150 watts X 2 (at 4 i2)
400 watts (monaural, at 4 £2)
Rated outputs (supply voltage at 14.4 V)
75 watts per channel (20 Hz -
20 kHz, 0.04 % THD, at 4 £2)
100 watts per channel (20 Hz -
20 kHz, 0.1 % THD, at 2 Q)
200 watts (monaural) (20 Hz -
20 kHz, 0.1 % THD, at 4 £2)
Frequency response
5 Hz-100 kHz (IdB)
Harmonic distortion
0.005 % or less
(at 1 kHz, 4 U)
Input level adjustment range
0.2 - 4,0 V (RCA pin jacks)
0.4 - 8.0 V (High level input)
50 - 200 Hz,-12 dB/oct
50 - 200 Hz, -12 dB/oct
50 Hz, 200 Hz, 800 Hz, 3.2 kHz,
12.8 kHz ±12 dB
Power requirements 12 V DC car battery
(negative ground)
Power supply voltage
10.5 -16 V
At rated output: 20 A
Remote input: 1.5 mA
Approx. 260 X 55 X 220 mm
(10 Vfx 2 74X8 Vf in.)
(1/h/p) not incl. projecting parts
and controls
Approx. 2.2 kg (4 Ib. 14 oz.)
not incl. accessories
Supplied accessories
Mounting screws (4),
Terminal cap (1)
Optional accessories
Connecting cord for power
amplifier RC--46
Design and specifications are subject to change
without notice.
High-pass filter
Low-pass filter
Equalizer
Current drain
Dimensions
Mass