Sony Microcassette Recorder BM 850T User Manual

3-757-398-32(1)  
Microcassette  
Dictator/Transcriber  
Operating Instructions  
BM-850D  
BM-850T  
1996 by Sony Corporation  
 
BM-850D/T 3-757-398-32 U E  
Features  
About This Manual  
As a dictator (BM-850D)  
The instructions in this manual are for the BM-850D  
and BM-850T. Before you start, please check your  
model number.  
• The hand control unit remotely controls the BM-  
850.  
The main unit is the BM-850 for both the BM-850D  
and the BM-850T. You can use the BM-850D as a  
dictator since the BM-850D is supplied with  
accessories for dictating, while you can use the BM-  
850T as a transcriber since the BM-850T is supplied  
with accessories for transcribing. Any differences in  
operation are clearly indicated in the text, for  
example, “BM-850D only”.  
• Dual electronic indexing function signals—“LTR”  
(end of letter) and “SEC” (special instructions to  
secretary) signals—can be recorded on a tape  
during dictating, recording of telephone calls,  
listening or in the stop mode.  
• The REC/ERASE lamp for checking that the  
recording or erasing is done.  
• Alarm sound and indication on the display  
window informs recording error.  
• Recording of telephone calls can be performed  
with the use of the optional TL-4 telephone  
recording adaptor.  
• With the use of the optional DE-45 or MDR-U10M  
earphones, you can monitor the sound with the  
desired sound level during recording.  
If you buy the accessories which your model does  
not have, your model works as both dictator and  
transcriber.  
Differences in supplied accessories  
Model  
Accessory  
BM-850D  
Supplied  
Supplied  
BM-850T  
Hand Control Unit  
Not supplied  
Not supplied  
Cradle of the hand  
control unit  
Dictation  
Hand control  
unit  
Foot Control Unit  
Earphone  
Not supplied  
Not supplied  
Supplied  
Supplied  
BM-850  
As a transcriber (BM-850T)  
• The foot control unit allows you to move the tape  
without using your hands.  
• Auto-stop function quickly accesses instructions  
and documents.  
• Auto backspace function with the REVERSE  
TIME control makes transcribing easy by  
enabling the reviewing of the last recorded words  
each time listening is resumed.  
• Two tape speeds (2.4 cm/sec. and 1.2 cm/sec.)  
can be selected according to the user’s needs.  
• Rapid erasing function with ERASE and REW  
buttons.  
• The Electronic “Index OFF” mode allows you to  
transcribe a cassette which was not recorded  
using a Sony Professional Dictating Machine.  
Transcription  
BM-850  
Foot control unit  
Introduction  
3
 
BM-850D/T 3-757-398-32 U E  
Operation Flow Chart  
For details, refer to the pages in ( ).  
: Necessary step  
: Optional step  
Dictation (BM-850D)  
Connect the AC power adaptor to the unit and to an AC outlet (6).  
.
Connect the hand control unit (6).  
.
Set POWER to ON.  
.
Insert a cassette (7).  
.
Set TAPE SPEED.  
.
Press RESET to set the digital counters to zero.  
.
Set the function selector of the hand control unit to DICT.  
Speak into the microphone.  
Record the SEC signal before giving instructions to the secretary  
(10).  
Quick review playback and correct the dictated material.  
Keep the function selector of the hand control unit pressed  
down toward B. SPACE to rewind the tape until the desired  
point on the tape is reached. Release the selector and playback  
of the dictation begins. When the reviewing is completed, set  
the function selector to DICT to proceed with dictation.  
Record the LTR signal at the end of each document (10).  
.
Set the function selector of the hand control unit to STOP.  
.
Press the eject button to remove the cassette.  
.
Hand the cassette to your secretary or transcriptionist.  
.
Introduction  
4
 
BM-850D/T 3-757-398-32 U E  
Transcription (BM-850T)  
.
Disconnect the hand control unit.  
.
Connect the foot control unit (6).  
.
Set POWER to ON.  
.
Insert the cassette (7).  
.
Set SPEAKER to BUILT-IN or connect earphones.  
.
Press AUTO STOP to make the AUTO STOP indication disappear (13).  
.
Set TAPE SPEED.  
.
Press REW.  
When the tape reaches the beginning of the dictated material, a  
beep tone is heard and the unit automatically shuts off (12).  
.
Press RESET to set the digital counters to zero.  
.
Keep the right side of the pedal depressed.  
(When the foot control unit is connected.) (14)  
or  
Set the function selector of the hand control unit to LISTEN.  
(When the hand control unit is connected.) (14)  
or  
Press LISTEN.  
(When the BM-850 is used for operation.) (14)  
.
Adjust VOLUME and TONE.  
Adjust the starting point for playback with the use of  
REVERSE TIME. (When the foot control unit is used.)  
Set SPEED CONTROL to ON and adjust SPEED.  
.
After transcribing, stop the tape.  
Release the pedal. (When the foot control unit is used.) (14)  
or  
Set the function selector to STOP. (When the hand control unit  
is used.) (14)  
or  
Press STOP. (When LISTEN on the BM-850 is pressed to play  
back the tape.) (14)  
.
Erase the tape (16).  
Introduction  
5
 
BM-850D/T 3-757-398-32 U E  
Power Connection  
Note on the AC power  
adaptor  
Use only the AC power adaptor  
supplied. Do not use any other AC  
power adaptor.  
to a wall  
outlet  
Rear  
to DC IN 9 V  
AC power adaptor  
(supplied)  
Porarity of the plug  
Setting Up the Unit  
Connecting the Hand Control Unit (supplied  
with the BM-850D only)  
For operation, refer to “Dictation” on page 8.  
BM-850  
to CONTROL UNIT  
Hand control unit  
Attaching the cradle  
Attach the cradle to the left or right side of the unit. Place the hand control  
unit on the cradle while not in use. Insert the cradle into the slots and slide  
to secure it.  
Left side  
Right side  
Connecting the Foot Control Unit (supplied  
with the BM-850T only)  
For operation, refer to “Transcription” on page 12.  
BM-850  
Foot control  
unit  
to CONTROL UNIT  
Setting Up  
6
 
BM-850D/T. 3-757-398-31. U. E  
Cassette Insertion  
1
4
5
3
2
Microcassette  
]
1
2
3
4
Take up any slack in the tape.  
Set POWER to ON.  
Press the eject button to open the cassette holder.  
Insert a cassette into the cassette holder with the side to  
be recorded on or played back facing upward.  
Push the cassette into the holder completely.  
5
Close the cassette holder.  
Notes on the Microcassette  
This unit uses only standard  
Microcassettes.  
Non standard cassettes cannot be  
used because their “L” dimension  
(see illustration) is different.  
To protect cassettes from accidental  
erasure  
When a recording is made, the previous  
recording is automatically erased.  
To prevent erasure, break the cassette tabs.  
Break out and  
remove the tab.  
Only standard  
Microcassettes have  
a small indentation  
on side A.  
Standard  
Plastic tape  
To reuse a cassette  
To record on a cassette with removed tabs,  
cover each slot with a piece of plastic tape.  
L
Approx. 5 mm  
Non standard  
Approx.  
2.5 mm  
L
Setting Up  
7
 
BM-850D/T. 3-757-398-31. U. E  
Dictation  
You need the BM-850D or, if  
your model is BM-850T, the  
hand control unit.  
To use the unit as a dictating  
machine, connect the hand  
control unit.  
Microphone  
DICT lamp  
SEC  
REC/ERASE  
2
FWD SPACE  
5
Function selector  
For connection, see page 6.  
LTR  
Hand  
speaker  
14 3  
Hand control unit  
1
2
3
Set POWER to ON.  
Tips for More Efficient  
Dictation  
Before you start dictation  
• Organize your thoughts.  
• Make notes or an outline of  
what you want to dictate.  
• Check that the cassette is erased.  
(See page 16.)  
Insert a cassette. (See page 7.)  
Set TAPE SPEED to the desired tape speed, 2.4 or 1.2 (cm/  
sec.).  
When you dictate  
• Identify yourself. (Name,  
department, phone number)  
• Indicate the type of dictation.  
(Memo, letter, etc.)  
• Give transcribing instructions.  
(Type of stationery, number of  
copies and who they are for,  
envelopes, etc.)  
4
5
Press RESET to set the digital counters to zero.  
Set the function selector to DICT.  
• Specify distribution. (Names,  
addresses, etc.)  
Recording starts. Speak into the microphone. ( appears on the  
display window. The DICT lamp on the hand control unit lights up  
and REC/ERASE lamp on the BM-850 blinks when the microphone  
picks up sound.  
During dictation  
• Relax and speak clearly, at  
normal speed.  
• Short sentences are best.  
• Include punctuation.  
• Spell difficult or unusual words.  
• Correct your mistakes. (Review  
and redictate, or use SEC signal  
to alert the transcriptionist of  
changes or corrections.)  
• At the end of each document,  
record an LTR signal.  
To stop the tape  
Set the function selector to STOP.  
Note  
Keep the hand control unit away  
from the BM-850 during recording.  
Otherwise, noise may be recorded.  
Operations  
8
 
BM-850D/T 3-757-398-32 U E  
Digital Counter While Dictating  
1
2
3
1 The LTR (end of letter) counter: Reference for the number of the LTR  
signals recorded.  
2 Tape counter: Numerical reference for recording and listening.  
3 The SEC (special instructions to secretary) counter: Reference for the  
number of the SEC signals recorded.  
To set the digital counter to zero  
We recommend that you press the RESET button before starting dictation.  
Keep the RESET button pressed for about one second to reset the LTR  
(document), SEC (special instruction) and tape counters to zero.  
Note  
• The numbers on the digital  
counter are memorized even  
when the POWER switch is set  
to STANDBY or a cassette is  
being removed.  
Convenient Functions  
To record LTR (letter) and SEC (secretary) signals  
You can record electronic index signals on the tape while the unit is set in  
recording (dictation), telephone recording, stop or playback (with the  
hand control unit) mode.  
LTR (letter=end of document) signal: Record at the end of each  
document.  
SEC (secretary=special instructions to secretary) signal: Record  
before giving instructions to the secretary.  
When the AUTO STOP function (see page 13) is activated (AUTO STOP:  
ON), the tape automatically stops at each index signal when it is rewound  
or rapidly advanced. Documents and instructions can be located without  
the user’s having to listen to the entire tape.  
Before dictating, press RESET to reset the counters to zero.  
Continued on next page.  
Operations  
9
 
BM-850D/T 3-757-398-32 U E  
Dictation (continued)  
To record the LTR signal  
LTR  
Press LTR on the hand control unit.  
Each time the button is pressed, the number  
on the LTR (document) counter increases by  
one and “LTR” flashes for about three seconds.  
Notes  
• The LTR or the SEC signal  
should be recorded with the  
intervals of more than 6  
seconds.  
• Playback sound is muted when  
either the LTR or SEC button is  
pressed.  
• If either the LTR or SEC button  
is pressed while turning on the  
SPEED CONTROL selector, the  
tape will run at normal tape  
speed.  
To record the SEC signal  
SEC  
Press SEC on the hand control unit.  
Each time the button is pressed, the number  
on the SEC (special instruction) counter  
increases by one and “SEC” flashes for about  
three seconds.  
Up to nine signals each can be recorded. If more than nine signals are  
recorded, “E” appears in the counter display.  
Recording time  
Select the desired tape speed for recording with the use of the TAPE  
SPEED selector.  
2.4 cm:For optimum sound (recommended for normal use)  
A 60-minute recording can be made using both sides of the MC-  
60BM Microcassette.  
1.2 cm:For longer recording time  
A 120-minute recording can be made using both sides of the MC-  
60BM Microcassette.  
Monitoring while dictating  
The recording can be monitored through earphones. Connect a Sony DE-  
45 or MDR-U10M earphones (not supplied) to the EARPHONE jack  
located on the left side of the unit. Adjust VOLUME if required.  
to EARPHONE  
VOLUME  
Earphone (supplied  
with BM-850T only)  
Operations  
10  
 
BM-850D/T 3-757-398-32 U E  
Quick reviewing (playback)/correcting the dictated material  
You can easily listen to the dictated material and correct it if required.  
1
2
3
Keep the function selector of the hand  
control unit pressed down toward  
B. SPACE to rewind the tape.  
to B. SPACE  
Release the selector. Playback of  
the dictation begins.  
LISTEN  
When the reviewing is completed,  
set the function selector to DICT to  
proceed with the dictation.  
to DICT  
For fast winding of the tape  
Keep the FWD SPACE button of the hand control  
unit pressed until the desired portion is reached.  
FWD SPACE  
When you have finished dictating  
Hand the cassette to your secretary without rewinding the tape.  
Operations  
11  
 
BM-850D/T 3-757-398-32 U E  
Transcription  
You need the BM-850T or, if  
your model is BM-850D the  
foot control unit.  
74 2  
To use the unit as a  
Fast forward  
transcribing machine, connect  
the foot control unit.  
For connection, see page 6.  
8
Rewind  
Start/Stop  
(Listen)  
61  
5 3 9  
Foot control unit  
1
2
3
4
Set POWER to ON.  
Tips on Transcription  
• Before typing, check the number  
of LTR and SEC signals  
recorded on the cassette and  
review the contents using the  
AUTO STOP function.  
Insert a cassette. (See page 7.)  
• Erase the tape when  
transcription is finished.  
Set SPEAKER to BUILT-IN.  
Set AUTO STOP to make AUTO STOP disappear (AUTO STOP  
function is off). (See page 13.)  
5
6
Set TAPE SPEED to the same tape speed as that used for  
recording (dictation).  
Press REW to rewind the tape.  
When the tape is completely rewound, a beep is heard and the unit  
automatically shuts off.  
7
8
Press RESET to set the digital counters to zero.  
Keep the right side of the foot control unit pedal  
depressed to listen to the tape.  
9
Adjust VOLUME and TONE.  
To stop the tape  
Release the pedal.  
Operations  
12  
 
BM-850D/T 3-757-398-32 U E  
To rewind the tape  
Keep the left side of the foot control unit pedal depressed.  
To rapidly advance the tape  
Keep the center top of the foot control unit pedal depressed.  
Convenient Functions  
AUTO STOP  
EARPHONE  
SPEED  
0 REW  
REVERSE TIME  
) FF  
p STOP  
SPEAKER  
SPEED CONTROL  
( LISTEN  
Note  
AUTO STOP function  
• The tape does not stop at the  
LTR or SEC signal even if the  
AUTO STOP function is on  
while the FF or REW button is  
continuously pressed.  
With the AUTO STOP function, recorded documents and instructions can  
be located without the user’s having to listen to the entire tape.  
This function activates only in rewind or fast forward mode.  
When the AUTO STOP button is pressed, AUTO STOP appears on the  
display window and the tape automatically stops at each electronic index  
signal previously recorded on the tape. (See “To record LTR and SEC  
signals” on page 9.)  
When the LTR signal is detected, the LTR document counter number  
increases or decreases, “LTR” blinks for approximately 3 seconds, and a  
beep tone is heard. The tape stops automatically.  
When the SEC signal is detected, the special instruction counter  
number increases or decreases, “SEC” blinks for approximately 3  
seconds, and a beep tone is heard. The tape stops automatically.  
When the AUTO STOP function is off, the numbers on the LTR  
(document) and SEC (special instruction) counters increase or decrease  
and “LTR” or “SEC” blinks when an LTR or SEC signal is detected, but the  
tape does not stop.  
Notes  
• E-INDEX signal of the Sony  
conventional models BM-577  
and so on corresponds to the  
LTR signal of the model BM-850.  
• LTR/SEC signals and E-INDEX  
signal do not correspond to the  
cue signals used for consumer  
type tape recorder.  
Controlling the speed  
Set the SPEED CONTROL switch* to ON to adjust the speed only by the  
SPEED control. The tape can be played back at higher or lower speed than  
normal.  
When the SPEED CONTROL switch is set to OFF, the tape moves at the  
normal speed regardless of the position of the SPEED control.  
* Tape speed can be changed in the range of about –10% to +50% with the use of  
the SPEED control.  
Continued on next page.  
Operations  
13  
 
BM-850D/T 3-757-398-32 U E  
Transcription (continued)  
Note  
Auto backspace function  
If the LTR or SEC signal is  
detected while the tape is being  
rewound with this function, the  
length of the reverse time may be  
longer than the setting you have  
selected.  
This control operates only when the foot control unit is connected.  
With the use of the REVERSE TIME control, the tape is rewound a little  
each time it is stopped. Then, the last few recorded words can be reviewed  
when you resume listening. Adjust the REVERSE TIME control to  
determine the length of tape to be rewound.  
At “9” position, the tape is rewound so that the dictated material can be  
reviewed for about 5 seconds*. At “0” position, the tape stops without  
being rewound at all.  
Set the REVERSE TIME control to the desired position and keep the right  
side of the pedal depressed to listen to the tape.  
* Measured at some point near the middle of the tape. The reverse time will vary in  
accordance with the remaining length of the tape.  
REVERSE TIME : at “9” position  
STOP is pressed at this point.  
Playback  
Tape  
approx. 5 seconds  
playback  
Next playback will start from this point.  
REVERSE TIME : at “0” position  
STOP is pressed at this point.  
Playback  
Tape  
playback  
Next playback will start from this point.  
Notes  
Tape transport operation  
• When the button is pressed  
while detecting the index signal  
during playback, the switching  
time of the operation modes  
may be delayed.  
• When a cassette which was not  
recorded using a Sony  
To  
BM-850  
Hand control unit Foot control unit  
Rewind Press 0 REW. Keep the function  
Keep the left side of the  
selector pressed down pedal depressed.  
toward B.SPACE.  
Stop  
Press p STOP. Set the function  
Release the pedal.  
Professional Dictating Machine  
(BM-531, 560, 570, 577, 820, 880,  
890, etc.) is played back or  
wound rapidly (in fast forward  
or rewind mode), the switching  
time of the operation modes  
may be delayed. In this case, set  
the unit to the Electronic “Index  
OFF” mode. (See page 15.)  
selector to STOP.  
Listen  
Press (  
LISTEN.  
Set the function  
selector to LISTEN.  
Keep the right side of  
the pedal depressed.  
Fast  
forward  
Press ) FF.  
Keep the FWD SPACE Keep the top center of  
button pressed. the pedal depressed.  
Operations  
14  
 
BM-850D/T 3-757-398-32 U E  
Private listening  
Connect a Sony DE-45 or MDR-U10M earphones (not supplied) to the  
EARPHONE jack.  
The sound will be heard through the earphones and speaker sound will be  
disconnected.  
Selecting the speaker  
You can listen to the dictated material through the built-in speaker or the  
speaker on the hand control unit by switching the SPEAKER selector to  
BUILT-IN or HAND.  
Transcribing a Cassette Recorded with a  
Dictator Other Than Sony’s  
If you transcribe a cassette which was not recorded using a Sony  
Professional Dictating Machine, set the unit to the Electronic “Index OFF”  
mode.  
RESET  
p STOP  
Notes  
In the tape stop mode, keep both RESET and STOP pressed for more  
than 2 seconds.  
Only the tape counter is displayed and the number is reset to “000”. The  
unit is in the Electronic “Index OFF” mode.  
• In the Electronic “Index OFF”  
mode  
— the LTR or the SEC signal is  
not recorded even if you  
press the LTR or SEC button.  
— the AUTO STOP function  
does not work even if the  
AUTO STOP button is  
pressed.  
• If you play back in the  
Electronic “Index ON” mode  
and the cassette was not  
recorded using a Sony  
To return the unit to the Electronic “Index ON” mode  
Change the mode by following the procedure above.  
Professional Dictating Machine  
(BM-531, 560, 570, 577, 820, 880,  
890 etc.), neither the operation  
buttons, the LTR and SEC  
counters nor the auto backspace  
function will work correctly.  
Operations  
15  
 
BM-850D/T 3-757-398-32 U E  
Erasing  
The recording can be erased  
rapidly.  
1
REC/ERASE  
p STOP  
2
1
2
Insert the cassette with the side to be erased up. (See page  
7.)  
Be sure not to rewind the tape after transcribing. The end portion of  
the dictated material to be erased should be positioned at the  
recording head.  
Keep ERASE pressed and then press 0 REW.  
The REC/ERASE lamp lights up and 0 appears on the display  
window.  
The portion of the tape being rewound is erased.  
To stop the tape  
Press p STOP.  
Operations  
16  
 
BM-850D/T 3-757-398-32 U E  
Telephone Recording  
To record telephone  
conversation, connect the  
optional TL-4 telephone  
recording adaptor* to the  
TELEPHONE PICKUP jack.  
For further details, refer to the  
instruction manual of the  
1
REC/ERASE  
3
Telephone  
TL-4 (not  
supplied)  
BM-850  
telephone recording adaptor.  
5
2
* The TL-4 cannot be used on  
some telephones.  
Rear  
to TELEPHONE  
PICKUP  
p STOP  
4
At the beginning of  
1
2
3
4
5
Connect the TL-4 (not supplied) to the unit.  
Set POWER to ON.  
telephone recording  
LTR signal is automatically  
recorded for about 3 seconds and  
the telephone recording begins at  
the same time.  
While the LTR signal is being  
recorded (for about 3 seconds), the  
unit cannot be stopped even  
though the STOP button is  
pressed.  
Insert a cassette. (See page 7.)  
During telephone recording  
Only the LTR, SEC and STOP  
buttons are operative.  
Set TAPE SPEED to the desired tape speed.  
Note  
If the TEL REC button is pressed  
when the telephone recording  
adaptor, etc. is not connected, the  
beep tone will be heard and the  
recording will not start.  
Keep TEL REC pressed for more than a second.  
Telephone recording begins. REC/ERASE lamp blinks and (  
appears on the display window.  
To stop the tape  
Press p STOP.  
Operations  
17  
 
BM-850D/T 3-757-398-32 U E  
Example of Dictation and Transcription  
Example of Dictation  
Set the function selector of the hand control unit to DICT.  
.
Blinks for approx. 3 seconds and  
stops blinking.  
Press SEC.  
“This is a letter. Type it up and send it by express.”  
“Today’s date is July 4, 1996.  
This letter is for Mr. Alan R. Jefferson  
Pyrene House, Sunbury on Thames,  
Middlesex, TW16 7AT, U.K.  
Dear Sir,  
We received your order for”  
.
Blinks for approx. 3 seconds and  
stops blinking.  
Press SEC.  
“under line  
POI-L-5049-D3581”, “quantity 270,000 today.  
Shipment can be made within two weeks by Air.  
Please accept our thanks for your order.  
Faithfully yours,  
John S. Smith  
Sales Manager  
U.K.G. Ltd.”  
.
Blinks for approx. 3 seconds and  
stops blinking.  
Press LTR.  
.
Set the function selector of the hand control unit to STOP.  
Example of Transcription  
Insert the cassette.  
.
Set AUTO STOP to make AUTO STOP disappear.  
.
Press REW to rewind the tape.  
The unit automatically shuts off when the tape reaches the tape  
top.  
.
Press RESET to set the digital counters to zero.  
.
Keep the right side of the foot control unit pedal depressed.  
Tape playback starts.  
.
Operations  
18  
 
BM-850D/T. 3-757-398-31. U. E  
Blinks for approx. 3 seconds and  
stops blinking.  
.
July 4, 1996  
Mr. Alan R. Jefferson  
Pyrene House, Sunbury on Thames,  
Middlesex, TW 16 7AT, U.K.  
Blinks for about 3 seconds and  
then stops blinking.  
Dear Sir,  
We received your order for POI-L-5049-D3581, quantity  
270,000 today. Shipment can be made within two weeks  
by Air.  
Please accept our thanks for your order.  
Faithfully yours,  
John S. Smith  
Sales Manager  
U.K.G.Ltd.  
Blinks for approx. 3 seconds  
and stops blinking.  
JSS/hh  
.
Stop the tape when the transcription is finished.  
If desired, keep ERASE pressed and then, press 0 REW to  
erase the cassette.  
Operations  
19  
 
BM-850D/T. 3-757-398-31. U. E  
Troubleshooting Guide  
Should any problem occur, conduct the following  
simple tests to determine whether or not servicing is  
required. If the problem persists after you have  
conducted these tests, consult the nearest  
Sony Dictation Systems dealer.  
The LTR or SEC counter does not work  
correctly.  
The reverse time of the auto backspace  
function is not correct.  
• A cassette which was not recorded using a Sony  
Professional Dictating Machine (BM-531, 560, 570,  
577, 820, 880, 890 etc.) is played back in the  
Electronic “Index ON” mode. (See page 15.)  
• The reverse time of the auto backspace function  
may become longer when the LTR or SEC signal is  
detected on the tape.  
The unit does not operate.  
• The AC power adaptor is not plugged into a wall  
outlet.  
• The POWER switch is set to STANDBY.  
No sound from the built-in speaker  
• The SPEAKER selector is set to HAND.  
• The VOLUME control is set in the MIN position.  
• An earphone is plugged in.  
The switching time of the operation modes  
(STOP, LISTEN, FF or REW) is delayed.  
• A cassette which was not recorded using a Sony  
Professional Dictating Machine (BM-531, 560, 570,  
577, 820, 880, 890 etc.) is played back in the  
Electronic “Index ON” mode. (See page 15).  
• When a button is pressed while detecting  
electronic index signal during playback.  
• The cassette is not inserted properly.  
The tape speed is too fast or too slow.  
• The TAPE SPEED selector is set incorrectly.  
• The SPEED control is set incorrectly.  
• The SPEED CONTROL switch is set to ON.  
The tape stops in the rewind or fast forward  
mode and the alarm sounds.  
• The AUTO STOP switch is activated and a tape  
with electronic index signal recorded is used.  
• The entire tape has been wound.  
Recording functions (Dict, Erase, Telephone  
recording, LTR, SEC) do not activate.  
• The tape is completely rewound.  
• The cassette tabs have been removed.  
The hand control unit or the foot control  
unit does not operate.  
• The plug is not connected to the CONTROL UNIT  
connector firmly.  
• The BM-850 is operated with the tape operation  
buttons on the BM-850. Press STOP and proceed  
with the operation on the hand control unit or the  
foot control unit.  
Sound drop-outs, loss of high frequency  
sounds, or excessive noise  
• The heads are dirty. See “Maintenance”.  
Erasing is unsatisfactory.  
• The erase head is dirty. See “Maintenance”.  
The LTR or SEC signal can not be recorded.  
• The unit is in the Electronic “Index OFF” mode.  
(See page 15).  
The LTR or SEC counter is not indicated.  
• The unit is in the Electronic “Index OFF” mode.  
(See page 15).  
Additional Information  
20  
 
BM-850D/T. 3-757-398-32. U. E  
Alarm System  
An alarm sounds and an indication appears on the display window in the following situations.  
Alarm system  
Situation  
To release alarm system  
When you press a button.  
m A beep is heard and  
blinks.  
• No cassette is inserted.  
• The cassette’s safety tabs have been  
removed.  
First, release the button, then  
• Insert a cassette.  
• Insert a new cassette or cover the  
safety slot.  
The unit shuts off.  
m A long beep is heard and †  
blinks.  
• End of tape  
• The tape is torn.  
• Rewind the tape.  
• Insert a new cassette.  
m “E” appears.  
• The number of LTR or SEC signal  
exceeds 9.  
• Do not press LTR or SEC button  
more than 9 times.  
The unit shuts off.  
m A short beep is heard and  
“LTR” or “SEC” blinks.  
• Either LTR or SEC are detected  
while the tape is wound rapidly (in  
fast forward or rewind mode) and  
the AUTO STOP function is on.  
• “LTR” or “SEC” stops blinking  
and lights up automatically  
when about 3 seconds have  
passed.  
When you press a button.  
m A beep is heard.  
• When you press the TEL REC  
button except in the stop mode.  
• When you put the hand control unit  
in the dictating mode during the FF,  
REW, ERASE or TEL REC mode.  
• To stop alarm sound, release the  
TEL REC button, or put the hand  
control unit in the stop mode.  
• To start recording, put the BM-  
850 in the stop mode first and  
then start recording.  
When you press a button.  
m Short beeps are heard.  
• When you press the TEL REC  
button though telephone recording  
adaptor, etc. is not connected to the  
TELEPHONE PICKUP jack  
properly.  
• Connect it properly.  
Additional Information  
21  
 
BM-850D/T. 3-757-398-32. U. E  
Specifications  
Tape  
Maintenance  
y (normal position type)  
Recording system  
4-track 2-channel monaural  
(L channel for electronic index signals, R channel for  
sound signals)  
Tape speed  
2.4 cm/s (1516 in./s), 1.2 cm/s (1532 in./s)  
Fast winding time  
Approx. 1 min. 50 sec. (2.4 cm/s) with Sony  
microcassette MC-60BM  
Frequency response  
Pinch roller  
Erase head  
Capstan  
Record/playback head  
200 – 4,000 Hz (at 1.2 cm/s)  
200 – 6,000 Hz (at 2.4 cm/s)  
Speaker  
Approx. 5.7 cm (214 inches) dia.  
Power output  
350 mW (at 10% distortion)  
Input  
TELEPHONE PICKUP (minijack)  
Sensitivity 0.2 mV  
Input impedance 10 kilohms  
Output  
EARPHONE (minijack)  
for 8 – 300-ohm earphones  
CONTROL UNIT connector  
for hand control unit or foot control unit  
Power requirements  
Cleaning the heads  
9 V DC  
To produce optimum sound, clean the tape heads  
after every 10 hours of use.  
First, disconnect the AC power adaptor. Press EJECT  
to open the cassette compartment lid. Moisten a  
cotton swab or a soft cloth with alcohol, and wipe  
the parts shown on the left.  
DC IN 9 V jack accepts the supplied AC power  
adaptor for use on 120 V AC, 60 Hz  
Power consumption  
14 W (with the supplied AC power adaptor)  
Dimensions  
Approx. 200 x 70.5 x 245 mm (w/h/d) (778 x 278 x 934  
inches)  
including projecting parts and controls  
Mass  
Cleaning the cabinet  
Approx. 1.2 kg (2 lb 11 oz)  
Accessories supplied  
Clean the cabinet with a soft cloth slightly moistened  
with a mild detergent solution. Never use strong  
solvents, such as thinner or benzine, since they may  
damage the finish.  
AC power adaptor (1)  
Hand control unit (1, BM-850D only)  
Cradle for the hand control unit (1, BM-850D only)  
Foot control unit (1, BM-850T only)  
Earphone (1, BM-850T only)  
Design and specifications are subject to change without  
notice.  
Optional accessories  
Hand control unit HU-80  
Foot control unit FS-85  
Earphone DE-45  
Headphones MDR-U10M  
Telephone recording adaptor TL-4  
Telephone pickup TP-15  
Message coupler TL-2  
Cleaning kit KK-31  
Your dealer may not handle some of the above listed  
optional accessories. Please ask the dealer for detailed  
information about the optional accessories.  
Additional Information  
22  
 
BM-850D/T. 3-757-398-32. U. E  
Location and Function of Controls  
For details, refer to the pages indicated in ( ).  
1 Eject button  
1
2
3
6
Press to eject the cassette.  
2 Display window (Back cover)  
3 Built-in speaker  
4 REC (record)/ERASE lamp (8, 16)  
5 POWER switch  
6 Cassette holder  
7 SPEED control (13)  
7
8
4
8 VOLUME control  
9 TONE control  
0 REVERSE TIME control (14)  
SPEAKER selector (15)  
!™ TAPE SPEED selector (12)  
SPEED CONTROL switch (13)  
RESET button (9)  
!∞ AUTO STOP button (13)  
TEL REC (telephone recording) button (17)  
r ERASE button (16)  
!• 0 REW (rewind)  
9
!º  
!¡  
!™  
!£  
5
!¢  
!§  
!∞  
!¶  
p STOP  
( LISTEN  
) FF (fast forwad)  
!• !ª @º @¡  
Left side  
Left side  
@™ CONTROL UNIT connector (6)  
EARPHONE jack (10, 15)  
@™  
@£  
Rear  
Rear  
TELEPHONE PICKUP jack (17)  
@∞ DC IN 9 V (6)  
@¢ @∞  
Additional Information  
23  
 
BM-850D/T. 3-757-398-32. U. E  
Display Window  
Notes  
1
2 3  
4
• It may be difficult to read the liquid crystal counter  
display due to the watching angle.  
• If you play back a cassette which was not recorded  
using a Sony Professional Dictating Machine, set the  
unit to the Electronic “Index OFF” mode (see page 15).  
5
6
7
8
1 ( indicator  
Displayed while the tape is being transported  
in the forward direction.  
2 0 (rewind) indicator  
Displayed while the cassette is being  
rewound.  
3 ) (fast forward) indicator  
Displayed while the tape is advanced rapidly.  
4 AUTO STOP indicator  
Displayed when the AUTO STOP button is  
pressed (AUTO STOP function is on).  
5 LTR (letter) counter  
End of letter counter  
Displays the number of end-of-letter signals  
(i.e. the number of documents) recorded.  
6 SEC (secretary) counter  
Special instructions for secretary counter  
Displays the number of special-instructions-  
for-secretary signals recorded.  
7 Tape counter  
8 (cassette) indicator  
Normally this indicator is not displayed.  
However, the indicator blinks in the  
following cases:  
• One of the TEL REC, LTR, SEC and ERASE  
buttons is pressed or the function selector  
is set to DICT when no cassette is inserted  
or when the cassette’s safety tabs have been  
removed.  
• A tape reaches the end.  
• A tape is torn while being rewound.  
Sony Corporation Printed in Japan  
 
BM-850D/T 3-757-398-32 U E  

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