Drum Assembly Replacement - Sony SRW-5000 Maintenance Manual

5-2. Drum Assembly Replacement

Outlinem
Replacement
1. Removing the Video Head Cleaner Assembly
(Refer to steps 1 and 2 in Section 5-4.)
2. Removing the Drum Assembly
3. Cleaning (Drum assembly mounting surfaces and Chassis mounting surfaces)
4. Attaching the Drum Assembly
5. Cleaning (Video heads, Upper drum's tape running surface and Lower drum's
tape running surface)
6. Reattaching the Video Head Cleaner Assembly
(Refer to steps 4 to 6 in Section 5-4.)
Adjustment after Replacement
7. Confirming the Drum Motor Operation (Refer to Section 3-3-4.)
[F1] (DRUM MOTOR) of the ALT SERVO CHECK menu
8. Adjusting the Tape Running (Refer to Sections 6-2 to 6-11.)
9. Confirming the Tape Running (Refer to Section 6-12.)
10. Electrical Adjustment after Replacing the Drum (Refer to Section 7-2.)
Note
. Be sure to perform the tape path alignment after replacing the drum assembly.
(Do not finish the alignment only checking.)
. Be careful not to damage the AT head and peripheral tape guides when removing/
installing the drum assembly.
Basic Knowledge
Except in the periodic replacement time, replace the drum assembly in the following
cases.
. The lower drum's tape running surface is damaged and cannot be repaired.
. A correct RF signal waveform cannot be obtained due to the worn lower drum
even if the tracking adjustment is performed.
. The performance of the unit deteriorates because of the noise or jitter caused by
the bearing life.
Tools
. Hexagonal wrench driver (2.5 mm):
. Torque screwdriver (6 kg.cm) (JB-5251):
. Torque screwdriver (12 kg.cm) (JB-5252):
. Torque screwdriver's hexagonal bit (d = 2.5 mm, l = 120 mm): J-6251-090-A
. Cleaning cloth:
. Cleaning fluid:
SRW-5000/5500
7-700-766-04
J-6252-510-A
J-6252-520-A
3-184-527-01
9-919-573-01
5-9