Sony UVW-1800P Service Manual page 183

6-3. DRUM ASSEMBLY REPLACEMENT
+ The Drum Assembly is the periodic replacement parts. It is recommended to replace referring to the periodic replacement table.
+ Replace the Drum Assembly in the following cases.
(1) When the rabbet guide of the lower drum has wom out, and the correct RF envelope cannot be obtained by the tape path adjustment.
(2) When the rabbet guide or tape contacting surface of the lower drum is injured.
(3) When the drum rotation is abnormal! and the performance as a VIR cannot be maintained due to noise or jitter.
+ The Drum Assembly includes the Upper Drum Assembly. When the Drum Assembly is replaced, the Upper Drum Assembly is also
teplaced at the same time.
Tools :
Cleaning piece : 2-034-697-00
Cleaning fluid : 9-919-573-01
Replacement flow chart
DR-214 Board Removal
7-13
RF Switching Position Adjustment
Picture Splitting Compensation Adjustment
Drum Motor Operation Check
7-3 10
Tape Path Check Servo System Adjustment
7-4 12
Tape Path (Entrance Side) Adjustment Video System Alignment
7-5
Tape Path (Exit Side) Adjustment
7-6 {
[ CTL Head Height Adjustment
TT
CTL Head Position Adjustment
Ti t
TC Head Position Adjustment
18 i
Audio Head Height Check
79 Y
Audio/Timecode Head Phase Adjustment
73 y
Tape Path Check