Technics SU-V660 User Manual

Troubleshooting
Guide
Before requesting service for this unit, check the chart below for a possible cause of the problem you are experiencing. Some simple checks or
a minor adjustment on your part may ¢liminate the problem and restore proper operation.
If you are in doubt about some of the check points, or if the remedies indicated in the chart do not solve the problem, refer to the directory of
Authorized Service Centers {enclosed with this unit) to locate a convenient service center, or consult your Technics dealer for Instructions.
Problem Probable causa(s
F
volume. the “MM” position when a moving-coil type
_ Cartridge is being used.
The high-frequency range
cannot be clearly heard. : the "MC" position when a moving-magnet type
: cartridge is being used.
Problems noted at all times
The sound lacks clarity and | The phono cartridge selector is incorrectly set to
The phono cartridge selector is incorrectly set to © « Set it to the "MM" position.
Sugaested remedy
SS SS ee ?
* Set it to the "MC" position.
No sound ie heard when the
power is switched ON.
Tha noawer cnrri
PRR ROMP RTE Werle h ee
i mili
wiht um L ‘
Te thee
Connections are incomplete or incorrect to the
speaker systems, etc.
The input setector’s setting is Incorrect.
The speaker selectors are set incorrectly.
One of the speakers is connected out of phase
When listening to stereo
sound, the sound lacks
depth (i.e. thin bass, tinny
sound).
When listening to stereo
sound, the ieft and right
sounds are reversed.
A lfow-pitched noise (“hum”
or “buzz”) is heard.
Sound is not heard from
one of the speaker
systems.
(Ct) at) tC
: The left and right speaker connections, source
- connections, or graphic equalizer connections
; are reversed.
the connection wires.
The speaker wires are disconnected.
The balance control is set too far to one side.
Sound stops during a
performance, or no sound
is heard when the power is
switched ON.
_ the pasitive and negative speaker connection
: impedance less than the Indicated rated
: impedance of the amplifier are used.
| DC voltage appears in the output, causing the
| protection circuitry to function.
Maintenance
To clean this unit, use a soft, dry cloth,
Tor very dirty Surfaces, dip a soft cloth in a weak soap-and-water
solution and wring well. After cleaning. wipe with a soft, dry cloth.
ee a es
[om ic aat camniletaly incartad
vw tw he ie Vwi iw.
; * Check all connections and correct them it
' The power cord or a fluorescent light, etc.,isnear |,
; © Check and correct the connections of the speaker
: ® Set so that sounds are heard at the center,
The protection circuitry has functioned because * Switch OFF the power, and, after determining and -
wires are “shorted” or speaker systems with an
¢ Confirm tha
completely.
* Check to be Sure that all connection wires are
correctly connected.
t tra nawar nara nlicn ic rannacstan
BREEN PPM pt ee OE ee er ee et
* Check ta be sure that the selection of the desired
sound source is made correctly.
* Set them to the correct position.
* Reconnect the speakers maintaining proper
polarity [i-e., (+) (+). (-J>(-JL
necessary.
¢ Try separating this unit as far as possible from the
electric appliance.
wires.
between the speaker systems.
correcting the cause, switch ON the power once
again.
«Use a speaker system of the proper impedance
rating.
Never use alcohol, palnt thinner, benzine, or a chemicaily treated
cloth to clean this unit.
Such chemicals may damage the unit’s finish.

Technics SU-V660 Specifications

General

Type	Integrated Amplifier
Total Harmonic Distortion	0.007%
Damping Factor	60
Input Sensitivity	2.5mV (MM), 150mV (line)
Channel Separation	55 dB (line)
Speaker Load Impedance	4Ω to 16Ω
Signal to Noise Ratio	106dB (line)
Dimensions	430 x 150 x 360mm (W x H x D)