Sony Digital Betacam DVW-707 Maintenance Manual page 92

4-2. Parts Replacement
Notes
If rotary heads are worn out or broken, replace the upper drum assembly.
The head chip can not be replaced.
Basic information
Apart from the periodic replacement time, the upper drum assembly needs to be replaced in the following
case.
. If a correct RF waveform is not obtained after the tracking adjustment
Preparations
1. Check that the unit is in the unthreading end mode.
2. Turn the power off.
3. Remove the front lid and the outside panel. (Refer to section 1-6 of Maintenance Manual Part 1.)
n
The upper drum assembly can replace when the cassette compartment attaches to the unit.
Tools
. Torque screwdriver bit (for M2)
. Hexagon bit (across 1.5 mm)
. Torque screwdriver (for 3 kg)
. Upper drum eccentricity adjustment tool (3)
. Upper drum eccentricity adjustment tool (2)
. Upper drum eccentricity adjustment tool (5)
. Upper drum eccentricity adjustment tool (6)
. L wrench (across 1.5 mm)
. Cleaning cloth
. Cleaning fluid
m
(1) If the upper drum assembly is attached to the flange, tighten the screws to the following torque reading.
. First: 9.8 x 10 _2
N.m {1 kfg.cm}
. Second: 24.5 x 10 _2
N.m {2.5 kgf.cm}
To tighten the screws to the above torque reading, set the torque to 9.8 x 10
attaching the hexagon bit to the torque screwdriver.
(2) Assemble the upper drum eccentricity adjustment tool before it is used.
Upper drum eccentricty
adjustment tool (5)
4-8
: J-6325-380-A
: J-6326-120-A
: J-6325-400-A
: J-6001-820-A
: J-6001-830-A
: J-6087-000-A
: J-6325-530-A
: 7-700-736-05
: 3-184-527-01
: 9-919-573-01
Upper drum eccentricity
adjustment tool (3)
Upper drum eccentricity
adjustment tool (2)
Upper drum eccentricity
adjustment tool (6)
_2
N.m {1kgf.cm} after
DVW-790WS/709WS/707
DVW-790WSP/709WSP/707P P2V1