Harman Kardon TDC33 Owners Manual - Page 14

MAINTENANCE Your tape recorder has been designed to require a minimum of maintenance. After a period of use, however, tape oxide and dust particles will inevitably form on the Record, Playback, and Erase Heads, the Capstan and the Pressure Roller. To remove these particles, merely take a cotton-tipped stick that has been moistened with methyl alcohol (common household rubbing alcohol) and lightly wipe these areas. CAUTION: Commercial tape head cleaners may react unfavorably with the encapsulating compounds used in the Record/Playback and Erase heads. NEVER CLEAN THE HEADS WITH A SHARP METAL OBJECT. DO NOT USE A BRUSH WITH A METAL BAND AROUND THE BRISTLES. DEMAGNETIZING HEADS: Through continuous use, the varying magnetic fields of the tape will gradually build up residual magnetism on the gap of the head. Excessive residual magnetism on the head will produce noise while the tape is being played. Therefore, it is advisable to demagnetize the heads from time to time for which we recommend periodic use of Head Demagnetizer. HEAD COVER RECORD HEADS PLAYBACK HEADS CAPSTAN IMPORTANT Your Harman-Kardon Tape Recorder is a precision instrument, capable of professional performance. Only name brand "tapes of standard or premium quality should be used. We strongly recommend that the tapes be no thinner than 1 mil in the interest of temperature stability, long term storage life, print through and proper recording level, and bias characteristics. It is pertinent to note that professional recording studios use 1 .5 mil tape for all master recordings; however, 1 mil tape will provide excellent results for home use. HUM AND NOISE In any high fidelity installation, hum may be caused by the interconnection of auxiliary equipment, as a result of the cables and different grounds. If hum is experienced with your receiver, disconnect everything but the speakers from the receiver. If hum persists, reverse the AC line cord. Plug in the auxiliary equipment and if hum appears, reverse the auxiliary equipment power plugs. When using a record player it may be necessary to connect a single lead from the record player chassis to the ground post on the rear of the receiver chassis. CAUTION: Hum may be also induced by defective connecting cables or by running these cables too close to a strong AC field. 0 lojolo SERVICE POLICY Harman-Kardon has established a special consumer division to answer all questions pertinent to the installation and operation of your unit. Please feel free to write us at any time and we will endeavor to offer prompt and complete advice. If your problem cannot be resolved through our combined efforts we may wish to refer you to one of our authorized warranty stations. The unit must be shipped via Railway Express, Prepaid to the station designated, accompanied by a brief note describing the exact nature of the difficulty. Under no circumstances should the set be shipped directly to the factory without prior authorization! TAPE GUIDE LEFT I RIGHT REC RD ERASE HEAD TAPE GUIDE PRESSURE ROLLER SERVICE If this instrument should not perform properly during the first two (2) years after date of purchase, contact the factory for instructions. The factory has many authorized warranty service stations in the United States. To aid us in selecting a service station convenient to you, it would be helpful if you would indicate what major city is closest to your home. Please write our Customer Service Department, Harman-Kardon, Incorporated, Plainview, New York 11803. Be sure to include the model and serial number of the unit. A brief description of your other components is often of help in answering your questions. DO NOT return this instrument to Harman-Kardon without first receiving authorization.