Sony DSR-20MD, Service Manual

Page: 104 / 225

5-12
5-1-4. PERIODIC CHECK AND MAINTENANCE
• Carry out the following maintenance and periodic checks not
only to fully display the functions and performance of the set,
but also for the equipment and tape. After repairing, service the
set as follows, regardless of the length of use.
4-1. CLEANING OF ROTARY DRUM ASSEMBLY
1) Press a wiping cloth (Ref No. J-2) moistened with cleaning
fluid (Ref No. J-1) against the rotary drum assembly gently,
and clean it while rotating the upper rotary drum assembly
slowly with your finger in the counterclockwise direction.
Note:
Do not rotate the motor on power or rotate the upper ro-
tary drum assembly in the clockwise direction with your
finger. The head tip will also be damaged if the wiping
cloth is moved perpendicularly against it.
Therefore, be sure to follow the above instructions when
cleaning the rotary drum assembly.
4-2. CLEANING OF TAPE PATH SYSTEM
(See Fig. 1.)
1) In the EJECT mode, clean the tape path systems (TG-1, 2, 3,
4, 5, 6, 7, 8, capstan) and the lower drum using a superfine
applicator (Ref No. J-3) moistened with cleaning fluid.
Note 1:
Make sure that no oil or grease of the link mechanisms
sticks to the superfine applicator. (Ref No. J-3)
Note 2: Do not use a applicator moistened with alcohol to the
other guide cleaning. But clean the pinch roller using al-
cohol.
Note: When cleaning the tape path system, be sure to set it to the LOADING position. (Refer to page 5-3)
Fig. 1.
TG3 TG4 TG5 TG6
Drum assembly
TG2
TG1
Capstan
Pinch roller
TG7
TG8