OPERATING INSTRUCTIONS
AM/FM SYNTHESIZER
TUNER
DT-920
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
TOA Corporation
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
These markings are located on the bottom, side or back of the unit.
CAUTION: TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-
SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This symbol indicates that dangerous
voltage constituting a risk of electric shock
is present within this unit.
This symbol indicates that there are
important operating and maintenance
instructions in the literature accompany-
ing this unit.
CONNECTIONS
NOTE:
To minimize noise...
1. Connect the FM and AM antennas as shown below.
- Keepthespeakerwires, power cord and all other cables away from
the antennas.
FM antenna
The T-shaped indoor FM antenna (300-ohm) is sufficient
to receive most local FM broadcasts and should be
connected to the rear FM terminals on the DT-920.
Infringe areas, orwhere reception is distorted or noisy,
an FM outdoor antenna (not supplied) should be
connectedinstead ofthe indoorantenna. Theterminals
will accept 300-ohm twin lead cable.
- Do not place the antenna close to a TV or speaker.
2. Connect one end of a supplied audio cable to the
OUTPUT (1 or 2) jack on the TUNER and the other end
to the AUX input jack (-20 to 0dBV, 10k ) of the 900
series II amplifier.
3. After making all the connections, connectthe AC power
cord to 120V AC 60Hz outlet.
AM antenna
The AM loop antenna is
sufficient to receive most
local AM broadcasts.
Assemble the loop antenna
This unit is equipped with a polarized plug. If you have
difficulty inserting the plug, turn it over and reinsert it. If
the unit will not be used for a long time, disconnect the
AC plug fromtheAC outlet.
Unwind the antenna wires
(about 3 turns), then
connect them to the AM
LOOP terminals. Place the
loop antenna in a position
which yields the best AM
reception, or attach it to a
wall or other surface as
shown.
CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH
WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.
ATTENTION:
POUR ÉVITER LES CHOCS ÉLECTRIQUES, INTRODUIRE
LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE
CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'
AU FOND.
CAUTION:
Loose or incorrect connections will result in poor sound or
improper operation.
900 SERIES II AMPLIFIER
DT-920
-2-
CONTROLS
9. Scan level button (SCAN LEVEL)
1. Power button (POWER)
10. Automatic/Manual tuning select button
2. Channel/Frequency select button (CH/FREQ)
3. Display (MULTI-FUNCTION DISPLAY)
4. Band select button (BAND)
(AUTO/MANUAL)
5. Tuning button (DOWN TUNING UP)
6. Preset tuning buttons (PRESET)
7. Direct-in button (DIRECT IN)
8. Memory button (MEMORY)
LISTENING TO THE RADIO
Preparation
1. Press the POWER button on the tuner.
FREQUENCY UP/DOWN TUNING
Automatic tuning
Manual tuning
1. Press the BAND button to select AM or FM.
2. Press the CH/FREQ button to select the frequency
mode. "FREQ" appears.
3. Press the AUTO/MANUAL button to select the automatic
tuning mode. "AUTO" appears.
1. Press the BAND button to select AM or FM.
2. Press the CH/FREQ button to select the frequency
mode. "FREQ" appears.
3. Press the AUTO/MANUAL button to select the manual
tuning mode. ("AUTO" disappears and "MONO" appears
when FM band is selected.)
4. Press and hold the TUNING "UP" or "DOWN" button
until the desired station frequency appears on the
display.
4. Press the SCAN LEVEL button to select the desired
scanning level, "SCAN 1" or "SCAN 2."
SCAN 1: To receive stations with weak signals
SCAN 2: To receive stations with strong signals
5. Press the TUNING "UP" or "DOWN" button.
The unit will scan up or down the band and receivethe
next stationwith asignal that is at least as strong asthe
scanning level selected in step 4.
- Press and release the TUNING "UP" or "DOWN"
repeatedly change the selected frequency one step
at a time.
6. Adjustforthedesiredsound qualitywiththeappropriate
controls of the connected amplifier.
-3-
DIRECT TUNING
1. Press the BAND button to select AM or FM.
2. Press the DIRECT IN button.
"FM ---. -- MHz" or "AM - - - - kHz" appears and blinks.
3. Pressthe PRESET buttons (1 - 0) to enterthefrequency
of a broadcast station.
Example:
FM 98.1 MHz... Press 9, 8 and 1.
FM 103.5 MHz... Press 1, 0, 3 and 5.
AM 560 kHz... Press 5 and 6.
NOTE:
Ifyou tryto enter an incorrect station frequency (86.0MHz
or 500kHz, for example), the display will continue to blink
until the correct number is entered.
AM 1680 kHz... Press 1, 6 and 8.
AUTOMATIC OR MANUAL PRESET TUNING
Automatic preset tuning (APT)
Manual preset tuning
1. Press the BAND button to select AM or FM.
2. Press the SCAN LEVEL button to select the desired
scan level, "SCAN 1" or "SCAN 2."
3. Press and hold down the MEMORY button for at least 3
seconds, until "APT" and "CH" blink, then release the
button.
1. Press the BAND button to select AM or FM.
2. Tune in a station as described in "FREQUENCY UP/
DOWN TUNING" or "DIRECT TUNING."
3. Press the MEMORY button. "MEMO" appears and
"CH - -" blinks.
4. Press two PRESET buttons (1 - 0) while "CH - -" is
blinking.
Theunitwillstartatthelowendoftheselectedbandand
scan upward (higher frequency numbers). Up to 20
stations will be memorized automatically.
When presetting stations, two buttons mustbe pressed
(except when presetting CH40).
Example:
After the last station is programmed, the lowest preset
station number will be selected. "APT" disappears.
CH01 ....... Press "0" and "1".
CH05 ....... Press "0" and "5".
CH12 ....... Press "1" and "2".
CH39 ....... Press "3" and "9".
CH40 ....... Press "4" only.
4. To automatically preset stations on the other band,
press the BAND button, then follow steps 1 - 3 above.
IMPORTANT NOTE
The selected station is now programmed. The preset
channel number and the frequency ofthe programmed
station appear on the display.
- If APT is activated, all previously programmed stations
will be cleared and new stations will be programmed.
- FM stations will be automatically programmed into CH01
- CH20.
NOTES:
AM stations will be automatically programmed into
CH21 - CH40.
- You cannot enter preset numbers above CH40.
- If a new station is programmed into a band and
preset number already containing a programmed
station, the previously programmed station will be
cleared.
5. To manually preset stations on the other band, press
the BAND button, then follow steps 1 - 4 above.
-4-
LISTENING TO PRESET STATIONS
Program stations as described in "AUTOMATIC OR MANUAL TUNING."
Using the TUNING "UP" or "DOWN" button
Using the PRESET button
1. Pressthe CH/FREQ button to selectthe channel mode.
("FREQ" disappears.)
1. Press two PRESET buttons (1 - 0) to select the desired
channel number.
2. Press the TUNING "UP" or "DOWN" button until the
desired channel number appears on the display.
- The preset station for the selected channel number
can be heard.
Example:
CH01 ... Press "0" and "1".
CH05 ... Press "0" and "5".
CH12 ... Press "1" and "2".
CH39 ... Press "3" and "9".
CH40 ... Press "4" only.
You cannot enter preset numbers above CH40.
- The preset station forthe selected channel number can
be heard.
- If a channel number which has not been preset is
entered,"----" appearsfor2seconds andtheprevious
station is selected.
Changing the reception frequencies
It is not necessary to perform this procedure in U.S.A and CANADA.
1. Select the band to be changed.
2. Turn the power off.
3. While pressing the BAND button, press the POWER button.
AM: 520 - 1710 kHz (10 kHz steps)
FM: 87.9 - 107.9 MHz (200 kHz steps)
522 - 1710 kHz (9 kHz steps)
87.5-108.0 MHz (50 kHzsteps)
- The preset stations will be retained in the memory even
if the unit is turned off.
Ifthe memory contents are lost due to a powerfailure or
other condition, preset the stations again.
WHAT TO DO IF ...
Ifthe operation of the unit or display is not normal, or you
wish to clear the contents of the memory, disconnect the
power cord from the AC outlet, then press the RESET
button (rear of the unit) for at least 20 seconds.
-5-
MAINTENANCE
Cleaning the cabinet
WARNING:
Use a clean soft cloth moistened with plain lukewarm
water and wrung dry. Never use benzol, benzene or other
strong chemical cleaners since these could damage the
finish ofyour unit. It is important that no liquid reachesthe
inside of the unit.
FOR YOUR PERSONAL SAFETY, BE SURE TO
DISCONNECT THE AC POWER CORD BEFORE
PROCEEDING WITH ANY MAINTENANCE OR CLEANING.
TROUBLESHOOTING GUIDE
If you have followed the instruction and are having difficulty operating the unit, locate the SYMPTOM in the left column
below. Check the corresponding POSSIBLE CAUSE and CORRECTIVE ACTION columns to locate and remedy the
problem.
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
No power when the POWER button is set to No power plug connection at the AC outlet.
ON.
Insert power plug into the AC outlet
Poor FM reception.
No antenna is connected.
Connect the supplied FM antenna to the FM
antenna terminals on the rear panel of the unit.
Refer to the "CONNECTIONS" section.
Shorted or faulty connection(s) between the
FM antenna and the tuner.
Check the connections to the FM antenna
terminals on the rear panel of the unit.
The antenna is not positioned for the best
reception.
Change the position ofthe antenna. Refertothe
"CONNECTIONS" section.
Continuous or intermittent hissing noise Noise caused by motors, fluorescent lamps,
Keep the unit away from noise sources.
Install an outdoor AM antenna (Noise may be
reduced, but not completely eliminated.)
during AM reception, especially at night.
lightning, television. etc.
A humming noise can be heard during AM
broadcast reception.
The power cord may be too close to the AM
loop antenna or the antenna wire.
Position the power cord away from the antenna
line and the AM loop antenna.
Adjust the position of the AM loop antenna.
The tuner operation or display is not normal. The memory must be reset.
Disconnect the power cord, then press the
RESET button (rear of the tuner) at least 20
seconds. See page 5.
Servicing:
Should this product require service, refer to the TOA Electronics, Inc., TOA Canada Corporation warranty.
SPECIFICATIONS DT-920
Tuning range AM:
FM:
FM usable sensitivity
AM usable sensitivity
Power requirements
Power consumption
520kHz - 1710kHz (10kHz steps)/522kHz - 1710kHz (9kHz steps)
87.9MHz - 107.9MHz (200kHz steps)/87.5MHz - 108.0MHz (50kHz steps)
14.7dBf
700µV/m
120V AC 10%, 60Hz
6 Watts
Dimensions (W x H x D)
Weight
Approx. 420 x 82 x 270 mm
Approx. 2.8 kg
IMPORTANT INFORMATION
All specifications are subject to change without notice.
-6-
FCC INFORMATION
This device complies with Part 15 of the FCC Rules.
Operation is subject to the condition that this device does not
cause harmful interference.
CAUTION:
Changes or modifications not expressly approved by TOA may
void the user's authority to operate this equipment.
Printed in Hong Kong
1AD6P1P0022--A
TOA Corporation
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