Kenwood AT-52 User manual

AUDIO TIMER
AT-52(B)
©
INSTRUCTION MANUAL
KENWOOD
This instruction manual can nike be used for model AT-52B.
The operations and specifications for both model AT-52B
and model AT-52 are the same.
Contents
Before applying POWET ................cce cece eee ees 3
FOAUTES sakes Ra elon aus oie 3
BeTOTO USE. cy cccue hada eraser tobedsn Vaheeisordeeeieuess 4
SYSTEM CONNECTIONS 20.2... cece ccc e cee ne eee e ee ees 5
Controls and indicators 00.00... ccc cece eee ees 6
PIUMO SOU Gi te. aloe dkrinee.s ela Sedeievele ed Daas 8
TIPGCESOUINGH.6t era ceusicr cei tesanegnees hae 9
Sleep timer S@tting.... 0. cece cece eee ee ea ee ees 10
IA-CasSe OFGIMICUITYs. ccascsa ces ooadivels ered osebedt 11
SPeCificatiOnS ..........c cece cece ee eeeeeee eee ce enees 12
PRINTED IN JAPAN B50-7124-00 (KUPM) {T)
5/54 67890N D12345/55

Introduction
Thank you for selecting our audio timer. It is
audio timer which embodies Kenwood’s rich
experience and outstanding technology.
This manual should be read carefully to
understand how to connect and operate
your new audio timer correctly.
For your records
Record the serial number, found on the
back of the unit, in the spaces designated
on the warranty card, and in the space pro-
vided below. Refer to the model and serial
numbers whenever you call upon your
Kenwood dealer for information or service
on this product.
Model AT-52/52B
Serial number
Unpacking
Examine the unit for any possibility of ship-
ping damage. if your unit is damaged or
fails to operate, notify your dealer im-
mediately. If your unit was shipped to you
directly, notify the shipping company
without delay. Only the consignee (the per-
son or company receiving the unit) can file
a claim against the carrier for shipping
damage.
We recommend that you retain the original
carton and packing materials for use
should you transport or ship the unit in the
future.
WARNING:
TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR
MOISTURE.
2 AT-52/52B (K.U.P.M)

Before applying power
AC voltage selector
This timer operates on 120 volts or
220~240 volts AC. The AC voltage
selector switch on the back panel is set to
the AC line voltage generally available in
the country where it is shipped. Before
connecting the power cord to your AC
outlet, make sure that the setting posi-
tion of this switch matches your AC line
voltage. If not, it must be properly chang-
ed to the proper setting.
Note:
Our warranty does not cover damage caused by
excessive AC line voltage due to improper set-
ting of the AC voltage selector switch.
120 V~ <> 220-240 V~ 120 V~ <e 220-240 V~
Switch lever
e
CiKese
H]
«
This shows switch
lever locked in the
220-240 V~ posi-
tion,
This shows switch
lever locked in the
120 V~ position.
Move switch lever to match your line voltage
with a small screw driver or other pointed tool.
AC voltage selector switch
Adjusting to your line frequency
The frequency selector switch is provided
at the rear panel. Be sure to set the selector
switch to your country frequency (50 Hz
or 60 Hz) before connecting the power
cord.
50Hz 60 Hz 50 Hz 60 Hz
Cai
(50 Hz Setting) (60 Hz Setting)
Frequency selector switch
Features
Easy-to-read display
The 24-hour fluorescent display shows the
_ time in green. The numerals have a height
of 13 mm, so they are easy to read.
AC outlet indicator
Indicates the status of AC outlet conditions
in red.
MOS type LSI
The MOS type LSI allows the AT-52/52B
to display the time accurately, and is syn-
chronized by the AC line frequency.
Accurate timer set
The timer can be set at 1 minute intervals;
the timer functions with an accuracy of
+0.02 second.
AT-52/52B (K.U.P.M) 3

Before use
Installation
*Do not use the unit in locations with high
temperature (40°C or more) and humidi-
ty and do not expose it to direct sunlight.
High temperatures adversely affect the
performance of the unit.
*Keep the unit away from water to prevent
any possibility of damage.
¢ install the unit on a flat surface, free from
dust and vibration.
Safety precautions
®The unit is factory adjusted for optimum
operation and no further adjustments are
required. Do not open the case.
eWhen connecting or disconnecting the
power cord, always hold the body of the
plug, not the cord, making sure that your
hand is dry. If your hand is wet, it could
result in an electrical shock.
Keep the unit away from any chemicals,
as they could affect the finish of the case.
When the unit is not to be used for a long
period of time, be sure to disconnect the
power cord.
A AT-52/52B (K.U.P.M)
Notes on operation
eThis unit should not be connected to a
cassette deck that does not feature a
stand-by mechanism. Connecting this
unit to such a tape deck will damage the
tape deck.
eWhen the power plug is connected or
power is stored after an outage, the
display will flickers. In this case, the
display shows wrong time. Correct the
time referring to the ‘’Time setting’’ on
page 8.
¢When the ‘‘AUTO’’ OUTLET pushbutton
is pressed, the time sometimes cannot be
set. In this case, the sleep timer may
sometimes work. To set the timer, refer
to ‘‘In case of difficulty’.

System connections
Connection
example
(auto
or
timer
recording
of
an
FM
broadcast)
Cassette deck
i p
El. o REEs.O.
To AC outlet
t
To wall
AC outlet wv _ KENWOOD, — aX
= eal (e821) “C)
Tuner’ = = ae eS
p| [826] [Ele O
Fas O)
Audio timer (AT-52/52B)
AT-52/52B (K.U.P.M) 5

Controls ani
KENWOOD
OUTLET
a ee
‘AUDIO TIMER
ON AUTO OFF
FORWARD
SSS
@
OUTLET pushbutton
@ OUTLET pushbuttons
ON........... Used to supply power to all AC
outlets. When this button is
pressed, the ‘AC OUTLET” of
the OUTLET INDICATOR lights
up.
AUTO....... Used when a timer or sleep
: timer is used. Power Is
available from the AC outlets
at the preset time.
ORF oicceee. Used to shut off all AC outlets.
When this button is pressed,
the ‘‘AC OUTLET’ of the
OUTLET INDICATOR goes off.
6 AT-52/528 (K.U.P.M)
@
TIME BACK
switch
@®
TIME FORWARD switch
@ TIME FORWARD switch
Use this switch to advance the time when
the fucntion selector is set to ‘‘ADJUST’’,
“TIMER SET” or ‘SLEEP SET’.
FAST ....... Advances the time quickly.
SLOW ...... Advances the time at a rate of
about 2 minutes per second.
@ TIME BACK switch
Use this switch to count back the time
when the fucntion selector is set to ‘‘AD-
JUST” or “TIMER SET’’.
FAST ....... Counts back the time quickly.
SLOW ...... Counts back the time at a rate
of about 2 minutes per se-
cond.
OUTLET |
NDICAT JR
a
OUTLE

| indicators
PRESENT TIME RSS |
ADSUST ——“Q0vy mA a
HOLD __f ;
\ TIMER SET
— OFF
m—— SLEEP SET
FUNCTION
©)
INDICATOR Display
@ OUTLET INDICATOR
FUNCTION selector
© FUNCTION selector
When the ‘AC OUTLET” indicator lights HOLD ....... Stops the time count and
up, power is available from the AC outlets. resets the seconds display to
When it does not light, power is not 0:00.
available. When the ‘AUTO’ OUTLET.
pushbutton is pressed, the “AUTO” in-
ADJUST ...Set to this position to adjust
hours and minutes.
dicator lights up. PRESENT
TIME ........ Set to this position to obtain’
® Display the current time. In normal
Indicates the time selected by the position use, set the switch to this posi-
of the FUNCTION selector. tion.
TIMER SET:
ON ........... Set to this position to automat-
ically turn the connected audio
components ON.
OFF: os sc04.: Set to this position to automat-
ically turn the connected audio
components OFF.
SLEEP
SET ...Set to this positon to adjust the
sleep timer operation time.
~ AT-52/52B (K.U.P.M) 7

Time setting
Set the time following the procedure below
and refer to ‘‘Controls and indicators’.
1. Connect the power plug to wall socket.
At this time, the display will flash.
2. Set the FUNCTION selector to ’‘AD-
JUST’’. and: operate the TIME FOR-
WARD or BACK switch to stop the
flashing.
PRESENT TIME —
eos -——— ON
apsusT ‘ TIMER SET
10,0—~¢ \— oF
\,
J SLEEP SET
FUNCTION
3. Press the ON or OFF button.
4. Depress the TIME FORWARD or BACK
switch so the display 1 or 2 minutes
ahead of the current time.
Example
When the current time is AM 10:46.45,
set the display to 10:48.00
Current time
B AT-52/52B (K.U.P.M)
Set the FUNCTION selector to
“HOLD”. At this time, the display
stops advancing.
a1
PRESENT TIME ————
ADJUST ena, on
ff \, TIMER SET
HOLD — OFF
"SLEEP SET
FUNCTION
Minute indication (1 digit)
6. Wait until the displayed time cor-
responds to the current time. At exactly
the moment when the displayed time
corresponds to the current time, set the
FUNCTION selector to ‘’PRESENT
TIME’. This sets the current time cor-
rectly.
PRESENT TIME on
ADJUST - y
Ly \, TIMER SET
HOLD ya OFF
—~ SLEEP SET
FUNCTION

Timer setting
Set the timer to turn the connected com-
ponents ON/OFF at the desired times.
Turn the power switches of the connected
audio components ON.
1. Set the FUNCTION selector to the
‘'TIMER SET (ON)’’ position.
PRESENT TIME ——-—
- on
ADJUST ——“ Sma GET
HOLD 4 b— OFF
\_ SLEEP SET
FUNCTION
Timer ON time
2. Set the ON time using the TIME FOR-
WARD or BACK switch.
3. Set the FUNCTION selector to ‘’TIMER
SET (OFF)’’.
PRESENT TIME aE |
orm ON
ADJUST —_Yy TIMER SET
HOLO —G SL oe
~— SLEEP SET
FUNCTION
Timer OFF time
4. Set the OFF time using the TIME FOR-
_ WARD or BACK switch.
5. Press the ‘’AUTO’’ OUTLET pushbut-
tons. When the ‘’AUTO”’ pushbutton is
pressed, the timer can be operated at
24-hour intervals in preset mode.
6. Set the FUNCTION selector to the
“PRESENT TIME’’, and the display in-
dicates the present time.
PRESENT TIME a,
A gym
AbJUST A TIMER SET
HouD orF
Jane SLEEP SET
FUNCTION
Current time
Note: ————____—_$$_________
The timer can function only in the ON-OFF se-
quence.
AT-52/52B (K.U.P.M) 9

Sleep
timer
setting
The
sleep
timer
automatically
turns
the
4.
Return
the
FUNCTION
selector
to
connected
audio
components
OFF
after
the
“PRESENT
TIME’’.
The
display
in-
preset
ON
time
has
been
passed.
The
ON
dicates
the
current
time.
time
can
be
preset
from
1
minute
to
1
hour
59
minutes
ahead.
at
1:
minute
intervals.
PRESENT TIME
TIMER SET
1.
Set
the
FUNCTION
selector
to
‘‘SLEEP
SET”.
FUNCTION
PRESENT TIME
ADJUST —I = ris set
Ee
\
OFF
.
’
5.
When
the
display
reaches
0:00,
the
ee
timer
automatically
turns
OFF
the
con-
ecincriGn
nected
audio
components.
Notes:————__—_—________________—-
:
e
To
stop
the
sleep
timer
mode
midway,
2.
Set
the
desired
ON
time
using
the
TIME
change
the
ON
time
to
0:00.
FORWARD
switch.
The
displayed
time
e
When
recording
in
the
sleep
timer
mode,
be
: :
3
.
careful
that
the
tape
being
used
is
not
C997
1:
oss,
TOO
ne
bes
“Bae
hols
shorter
than
the
preset
ON
time.
the
ON
time.
ee
Sleep timer
ap SSieel 28] “O:)
3.
Press
the
‘‘AUTO’’
OUTLET
pushbut-
ton.
Power
is
supplied
to
the
AC
outlets
and
the
“AC
OUTLET’’.
and
the
“AUTO”
outlet
indicator
light.
10 At-52/528 {K.U.P.M}

In case of difficulty
Before consulting your Kenwood dealer, check the timer referring to the table below.
Symptom
Possible cause
The current time is fast or
slow.
The power frequency selec-
tor is not set correctly. ,
Remedy
——-—___—_
Set the power frequency
selector to the correct posi-
tion {refer to the procedure
on Page 3.)
a
—
The displayed time does
not advance.
The FUNCTION selector is
set to ‘‘TIMER SET (ON or
pens
Set the FUNCTION selector
to ‘PRESENT TIME”’.
The display flashes and in-
dicates the wrong current
time or preset time.
stop at the preset time.
The power has been re-
stored after an outage.
9).
Preset time cannot be set. The timer is in the sleep | Set the FUNCTION selector
timer mode.
The sleep timer does not | The timer ON time is set at | Reset the timer set time
the sleep timer ON time.
oS a re et eee ee cet oe I Sa
Correct the current time
and preset time (refer to the
procedures on pages 8 and
to ‘‘SLEEP SET’’ and set
the sleep timer ON time
0:00.
Jater than the sleep timer
ON time.
AT-52/52B (K.U.P.M) 14

Specifications —
Clock
type
...........000.00..0000..
24-hour
digital
clock
Display
type
............0..0......
Fluorescent
display
Time
accuracy
...................
AC
power
supply
synchronized
Timer:
ON
time
.......:........
Can
be
set
at
1
minute
intervals
OFF
time
...............
Can
be
set
within
23
hours
59
minutes
at
1
minute
intervals.
Timer
accuracy
.......
Less
than
+0.02
second
after
preset
time
Sleep
timer
...0..00000000000.....
The
ON
time
can
be
set
from
between
1
minute
and
to
1
hour
59
minutes
AC
outlets
..00.00.
ee.
Two
parallel
outlets,
up
to
600
W
(U.S.A.
and
Canada),
1000
W
(Other
countries}
,
Power
requirements
............
U.S.A.
and
Canada
Models:
AC
120
V,
60
Hz
Other
Countries:
AC
120/220
~240
V
(Switchable},
50/60
Hz
(Switchable)
Power
consumption
............
6
W
Dimensions
.......................
W420
mm
(16-17/32"’)
H
57
mm
(2-1/4’’)
D
230
mm
(9-1/167')
Weight
«2000.00.00.
2.0
kg
(4.4
ibs}
(Kenwood
follows
a
policy
of
continuous
advancements
in
development.
For
this
reason
specifications
may
be
changed
without
notice.)
KENWOOD