Sony SEQ-711 - Troubleshooting; No audio even when the POWER switch is turned on; No equalization; The operation cannot be performed with the remote commander

Specifications
Inputs LINE IN: Phono jacks, 245 mV
(-10 dBs), 50 kilohms
TAPE IN: Phono jacks, 245 mV
(-10 dBs) 50 kilohms
Outputs LINE OUT: Phono jacks, 245 mV
(-10 dBs),
Load impedance: more than 10
kilonms
TAPE REC OUT: Phono jacks, 245 mV
(-10 dBs),
Load impedance: more than 10
kilohms
Graphic equalizer Boost/cut range: + 10 dB
Center frequencies: 63 Hz, 160 Hz,
400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz,
16 KHz
Frequency response (with EFFECT OFF)
LINE IN: 20 Hz to 50 kHz, *°, dB
Harmonic distortion LINE IN: Less than 0.01 %
(at 1 kHz, 1 V output)
Signal-to-noise ratio (with EFFECT OFF)
LINE IN: Better than 100 dB
(A network, 1 V output)
Power requirements 120 V AC, 60 Hz
Power consumption 13W
AC outlet 1 unswitched, 120 W/1A max.
Dimensions Approx.430 X 110 X 265mm (w/h/d)
(17 x 4/, x 10 '/, inches)
including projecting parts and controls
Weight Approx. 3.2 kg (7 ib 1 oz)
Accessories supplied
Audio connecting cords (2)
Remote commander RM-J711(1)
Sony batteries SUM-3 (NS) (2)
Design and specifications are subject to change without
notice.
Troubleshooting
Before going through the check list below, first refer back to
the connections and operating procedures.
Should any problem persist after you have made these
checks, consult your nearest Sony deaier.
Trouble
Cause
No audio even when
the POWER switch is
turned on.
© The power cord is
disconnected.
® The connecting cord is
disconnected.
No equalization
© The EFFECT button is switched
off (the indicator is off).
¢ Connections are not made
properly.
The operation cannot
be performed with the
remote commander.
¢ Check that the batteries are
loaded correctly.
* Check if there is any obstacle
between the remote
commander and this unit.
¢ Check if the batteries are
exhausted.
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