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Additional Information
BM-850D/T. 3-757-398-32. 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 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 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).
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 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.