Sony GY-8240UWD Maintenance Manual page 156

3-20. Threading Ring Assembly Replacement
11. Removing the Ring Roller
Remove the screw, then remove the ring roller (B).
n
Be careful not to touch the drum (especially the
rotary heads).
12. Removing the Threading Ring
Assembly
Remove the threading ring assembly from the
chassis, while pressing the T tension arm in the
arrow direction.
n
Be careful not to damage the drum (especially the
rotary heads and the tape running surface of the
upper drum) and the capstan motor shaft.
Installation
13. Cleaning
Clean the inside of a new threading ring assembly
with a cleaning cloth moistened with cleaning fluid.
14. Installing the Threading Ring Assembly
Press the T tension arm in the arrow direction,
and install the threading ring assembly while
attempting to fit it to the grooves of the ring
rollers (A) and (C).
15. Installing the Ring Roller
(1) Pass the ring roller (B) through the roller
shaft while holding the threading ring
assembly so that it does not come off from
the grooves of the ring rollers (A) and (C).
Then tighten the screw.
(2) Check that the threading ring assembly does
not come off from the three ring rollers.
And check that the roller of the T tension
regulator assembly does not come off from
the side of the threading ring.
16. Installing the Gear Box Assembly
Install the gear box assembly.
Refer to steps 4 to 6 in Section 3-19.
17. Confirming the Threading Ring
Operation
Turn the M gear of the gear box assembly
manually and confirm that the threading ring and
the three ring rollers rotate smoothly while
repeating the threading and unthreading.
3-70
* Omits the illustration of parts around the threading ring (drum etc.).
Ring roller (C)
Remove/Install the Threading Ring Assembly
B3 x 16
Washer
Ring roller (B)
Threading ring
assembly
T tension arm
Ring roller (A)
Roller
T tension
regulator assembly
GY-8240UWD
GY-8240FC