Sony BM-850D Troubleshooting Guide, The unit does not operate, No sound from the built-in speaker

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.

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Additional Information

BM-850D/T. 3-757-398-32. U. E