Sony UVW-1800P Service Manual page 187

6-4, DRUM SHAFT GROUNDING ASSEMBLY REPLACEMENT
+ When the Shaft Grounding Assembly wom out, the white scattered noise may appear on the rhonitor. Then replace the Shaft Grounding
Assembly.
* Do not apply force on the Shaft Grounding Assembly nor bent it forcibly.
Tools ;
Cleaning piece : 2-034-697-00
Cleaning fluid : 9-919-573-01
Replacement flow chart
DR-214 Board Removal -
Removal
1. Stand the unit with the left side bottom.
2, Remove the four screws securing the DR-214
board brackets. (Refer to section 6-3.)
3. Unplug the connector connecting the DR-214 And
MB-470P boards.
4. Remove the screw fixing the Drum Shaft
Grounding Assembly and remove it.
Installation
5. Clean the protruding tip at the top of new Drum
Shaft Grounding Assembly with cleaning piece
moistened with cleaning fluid. After cleaning,
wipe the cleaned surface a few times with dry
cloth.
Precaution ; During cleaning, do not apply force on the
Shaft Grounding Assembly nor bent it
forcibly.
Shaft Grounding Assembly
6. Clean the Shaft Grounding Assembly and its
contacting surface of the Drum Assembly with
cleaning piece soaked with cleaning fluid.
7. Install the Shaft Grounding Assembly so that the ' screw (PS2.6X5)
protruding tip at the top of Drum Shaft Grounding
Assembly is positioned in the center of the
contacting surface on the bottom of the Dram
Assembly.
Precaution : During installation, do not apply force on
the Shaft Grounding Assembly nor bent it
forcibly:
8. Perform the works reversing the steps 3 through f.