SONY DSBK-120
Manual de Servicio

3-11. HEAD CLEANING WHEN HEAD CLOGGING OCCURS
Clean the video head as follows when the head gets dirty. . Procedure to use the cleaning cassette 1. Insert the cleaning cassette DVM12CL in the DSR-85/ 85P and press the [PLAY] key immediately (within 1 second). Make sure that the [EJECT] key flashes, the [PLAY] key lights and the display appears. Note : . Use only the DVM12CL cleaning cassette tape. If another cleaning cassette tape is used, abnormal abrasion or breakage of the video head could occur. . Press the [PLAY] key immediately after inserting the cleaning cassette tape. 2. The cleaning cassette tape is automatically ejected after running for 10 seconds. Note : Do not rewind the cleaning cassette tape to use it again. 3. Make sure that the head is no longer dirty. If the video head is still dirty after step 2 above, clean the video head as follows. . Procedure to use the cleaning cloth 1. Soak the cleaning cloth with cleaning liquid and bring it into contact lightly with the video head. 2. Turn the upper drum slowly by hand in the rotating direction of the head (counterclockwise when viewed from the top) to clean the video head. Note : . Never move the cleaning cloth in the vertical direction against the video head because it may break the head. . Turn the power switch off when cleaning the video head.

3-12. OPERATING THE VTR WITHOUT A CASSETTE TAPE
When adjusting the mechanical block, the VTR is sometimes operated without a cassette tape. This section describes how to do this. 1. Remove the cassette compartment from the DSR-85/ 85P or remove the connector of the cassette compartment. 2. Turn on switches S501-3 and 4 of the SY-220 board, then turn on the main power. Note : If switch S501-3 of the SY-220 board is not on, an error will occur. The operating method of each mode is as follows. . THREADING After the reel motor and the upper drum rotate, the threading ring rotates to enter the threading mode. The tension arm and the threading ring move to the specified position, then the threading is completed. This condition in which the threading is completed is referred to as the STOP status. . PLAY Press the [PLAY] key. The pinch roller is pressed against the capstan shaft to enter the PLAY status. When the [PLAY] key is pressed during threading, the pinch roller is pressed against the capstan shaft to enter the PLAY status after the threading has completed. . FF Press the [F|FWD] key. . The pinch roller is pressed against the capstan shaft to set the FWD.SEARCH to five-times speed. . REW Press the [REW] key. The pinch roller is pressed against the capstan shaft to set REV.SEARCH to five-times speed.

DSR-85/85P

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