Head Cleaning When Head Clogging Occurs - Sony DSR-1800 Service Manual

4-3-2. Head Cleaning when Head Clogging
Occurs
Clean the video head as follows when the video head gets
dirty.
Procedure to use the cleaning cassette
n
Use only the cleaning cassette tape as follows.
If another cleaning cassette tape is used, abnormal abrasion
or breakage of the video head could occur.
Cleaning cassette tapes :
DV12CL (Standard)
DVM12CL (Mini)
1. Insert the specific cleaning cassette tape in this unit.
The unit is automatically set in the PLAY mode and
the cleaning tape starts running.
Confirm that the [PLAY] key lights and the display
appears.
2. The cleaning cassette tape is automatically ejected
after running for 10 seconds.
n
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.
m
. 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.
DSR-1800/P/1600/P
4-3-3. Operating the VTR without A Cassette
Tape
The VTR can be operated without a cassette tape by the
following switch setting.
Switch setting
1. Remove the cassette compartment from this unit.
2. Turn on switches S400-4 of the SSP-24 board (DSR-
1800/P)/SSP-23 board (DSR-1600/P).
3. Then turn on the main power.
Operating method
Threading
While pressing the S/T reel motors, press the [STOP] key.
The upper drum rotates, threading ring rotates. The unit
enters 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.
4-3. Countermeasure in an Emergency
4-17