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10

• If you press 

TUNING

 

UP

 at the top of the frequency 

range or 

TUNING

 

DOWN

 at the bottom of the frequency 

range, the frequency at the opposite end of the range 
appears.

Direct Tuning (Remote Control Only)

Follow these steps to directly enter a frequency.

1. Press 

FM

 or 

AM

 on the front panel (or on the remote 

control) to select the desired band. The receiver tunes to 
and displays the frequency last selected in that band.

2. Press 

DIRECT TUNING

 on the remote control. 

DIRECT

 

IN

 scrolls by, followed by 

AM

 

– – – –

 

kHz

 for AM or 

FM

 

– – 

 .

 

– –

 

MHz

 for FM. The first 

 flashes.

3. Enter the desired frequency using the remote control’s 

number buttons.

Notes:

• If you press 

1

 to enter a FM frequency, such as 103.5, 

10

 automatically appears. If you also press the zero, the 

frequency that appears would be 

100.30

.

• The last zero always appears automatically in both FM 

and AM frequencies.

• If you do not press a key within 5 seconds, the receiver 

exits direct tuning. Start over at Step 2.

MEMORY TUNING

Memory tuning lets you instantly tune to a stored frequency. 
You can store up to 30 AM and 30 FM frequencies in the 
receiver’s memory. The receiver automatically stores the first 
30 stations found in the selected band into the memory. You 
can also manually store a station into memory.

Automatically Storing Stations

1. Press 

FM

 or 

AM

 on the front panel (or on the remote 

control) to select the desired band. The receiver tunes to 
and displays the frequency last selected in that band.

2. Hold down 

MEMORY

 for more than 2 seconds. 

MEMORY

 

and 

CH

 appear while the receiver steps through the 

frequencies, beginning with the low end (87.5 MHz for 
FM or 530 kHz for AM).

3. When the receiver finds a station, it stores in the first 

memory channel, the 

CH

 number increments, and the 

receiver looks for the next station. When the receiver finds 
the thirtieth station or when it reaches the high end of the 
frequency range, 

MEMORY

 disappears and the receiver 

tunes to the lowest frequency station in the band.

Repeat these steps to automatically store stations in the other 
band.

Manually Storing a Station

When the receiver automatically stores stations, some of them 
might not be your favorites. Or, the 30-channel memory might 
have filled up before the receiver reached your favorite station 
at the high end of the frequency range. Follow these steps to 
manually replace a station in memory.

1. Press 

FM

 or 

AM

 on the front panel (or on the remote 

control) to select the desired band. The receiver tunes to 
and displays the frequency last selected in that band.

2. If 

CH

 appears on the right side of the display, press 

MODE

 

to change the receiver to manual-tuning mode. 

MANUAL

 

briefly appears.

3. Use either automatic or manual tuning to find the desired 

station.

4. Press 

MEMORY

MEMORY

 flashes on the display.

5. While 

MEMORY

 flashes, press 

TUNING

 

UP

 or 

DOWN

 until 

the desired memory channel number appears.

6. Press 

MEMORY

 again to store the station immediately. Or, 

wait about 5 seconds and the station is automatically 
stored in the selected channel.

Notes: 

• If you store a frequency in a memory that already contains 

a frequency, you replace the previous frequency.

• If your receiver is disconnected from AC power for several 

days, it loses all the stored frequencies.

Tuning to a Station in Memory

1. Press 

FM

 or 

AM

 on the front panel (or on the remote 

control) to select the desired band. The receiver tunes to 
and displays the frequency last selected in that band.

2. If 

CH

 does not appear on the right side of the display, press 

MODE

 to change the receiver to memory-tuning mode. 

PRESET

 briefly appears.

3. Press 

TUNING

 

UP

 or 

DOWN

 (or 

PRESET

 

CALL

  

and 

 on the remote control) to tune to the next higher or 

lower station stored in memory.

Or, press 

PRESET

 

SCAN

 to scan through the stations in 

memory. The receiver tunes to each station for about 5 
seconds. When you hear the station you want to listen to, 
press 

PRESET

 

SCAN

 again.

You can also tune to a station in memory by using the 
remote control’s number buttons to enter the channel 
number. For single-digit channels, enter 

0

 first (for 

example, enter 

06

 for Channel 6).

Summary of Contents for STA-3850

Page 1: ...owner s manual STA 3850 STEREO RECEIVER ...

Page 2: ...k for extended periods FCC NOTICE This system complies with the limits for a Class B digital device as specified in Part 15 of FCC Rules These limits provide reasonable protection against radio and TV interference in a residential area However your equipment might cause TV or radio interference even when it is operating properly To eliminate interference you can try one or more of the following co...

Page 3: ...ord Power Cord Protection Route power supply cords so they are not likely to be walked on or pinched by items placed on or against them paying particular attention to cords at plugs convenience receptacles and the point where they exit from the product Lightning For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time unplug i...

Page 4: ...ntrol s Batteries 8 Connecting to AC Power 8 Operation 9 Using the Sleep Timer 9 Tuning the Radio 9 Manual and Automatic Tuning 9 Direct Tuning Remote Control Only 10 Memory Tuning 10 Automatically Storing Stations 10 Manually Storing a Station 10 Tuning to a Station in Memory 10 Adjusting Balance 11 Muting the Receiver 11 Using Headphones 11 Listening Safely 11 Cassette Deck Features 11 Using the...

Page 5: ...and the other pair to the B SPEAKERS terminals Optimus and other high quality speakers have color coded speaker terminals red for positive polarity and black for negative polarity Use these color coded terminals as a guide to help you properly connect the speakers to the receiver Use 16 gauge or larger speaker wire for all speaker connections and consider possible speaker locations before you deci...

Page 6: ...und wire to the receiver s GND screw terminal Connecting a CD Player To connect a CD player to the receiver connect the CD player s left and right output jacks to the receiver s L and R CD IN jacks Connecting a Cassette Deck You can connect a cassette deck to the TAPE MONITOR jacks Connect the cassette deck s output jacks to the PLAY jacks and connect the cassette deck s input jacks to the REC jac...

Page 7: ...se only or an outdoor VHF TV antenna To connect the TV antenna to the receiver you need a VHF UHF FM splitter not included RadioShack stores carry a full line of quality antennas and antenna connection accessories Warning To prevent injury read and follow all cautions and warnings that accompany the outdoor antenna For the best radio reception use an outdoor antenna Follow these steps to connect a...

Page 8: ...he battery compartment cover push the compartment s tab in the direction of the arrow then lift off the cover 2 Place two fresh AA batteries in the compartment as indicated by the polarity symbols and marked inside 3 Replace the battery compartment cover Note If the remote s range is reduced replace the batteries CONNECTING TO AC POWER Warning To prevent electric shock do not use this polarized pl...

Page 9: ...u can use VOLUME and on the remote control 5 To adjust the tone turn BASS and TREBLE toward or To increase the high and low ranges of sound at low volume press LOUDNESS To turn off this feature press LOUDNESS again 6 To adjust the balance of sound between the left and right speakers see Adjusting Balance on Page 11 7 When you finish using the receiver press POWER to turn it off USING THE SLEEP TIM...

Page 10: ...st frequency station in the band Repeat these steps to automatically store stations in the other band Manually Storing a Station When the receiver automatically stores stations some of them might not be your favorites Or the 30 channel memory might have filled up before the receiver reached your favorite station at the high end of the frequency range Follow these steps to manually replace a statio...

Page 11: ...the volume level so a volume level that does not cause discomfort might still damage your hearing CASSETTE DECK FEATURES You can connect a cassette deck to the receiver Selecting TAPE MONITOR lets you hear the playback from the cassette deck you connected to the receiver s TAPE MONITOR jacks Using the Tape Monitor Button Press TAPE MONITOR TAPE MON appears along with the last program source you se...

Page 12: ...ne of the speaker wires or the input cord is disconnected Check all connections BALANCE is set too far to one side Set BALANCE to the center position High noise level Station not correctly tuned Adjust tuning Antenna not connected Connect the antenna FM antenna still coiled or is not pointing in the correct direction Stretch both ends of the antenna taut and reposition the antenna AM loop antenna ...

Page 13: ...hack and is covered by a limited warranty from RadioShack If your receiver is not operating as it should take it to your local RadioShack store or call 1 800 THE SHACK for assistance THE FCC WANTS YOU TO KNOW Your receiver might cause radio or TV interference even when it is operating properly To determine whether your receiver is causing the interference turn off your receiver If the interference...

Page 14: ...B FM Tuner Frequency Range 87 5 to 108 MHz Usable Sensitivity Mono 15 µV m EMF Signal to Noise Ratio Mono 68 dB Stereo 63 dB Distortion Stereo 0 5 1 kHz Alternate Channel Selectivity 45 dB 400 kHz Stereo Separation 35 dB 1 kHz AM Tuner Frequency Range 530 to 1720 kHz Sensitivity IHF Loop Antenna 500 µV m Selectivity 25 dB Signal to Noise Ratio 35 dB General Power Requirements 120 Volts AC 60 Hz Po...

Page 15: ...15 NOTES ...

Page 16: ...nt of a product defect during the warranty period take the product and the RadioShack sales receipt as proof of purchase date to any RadioShack store RadioShack will at its option un less otherwise provided by law a correct the defect by product repair without charge for parts and labor b replace the product with one of the same or similar design or c refund the purchase price All replaced parts a...

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