Adjustments - Sony HMD-A400 Service Manual

HMD-A400
Connect the communication cable of the computer to the connector located on the monitor. Run the service software and then follow
the instruction.
Computer
as a Jig
• Landing Fine Adjustment
1. Put the set inside the Helmholtz coil.
2. Set TLH plate to zero position.
3. Input the single green signal.
4. Demagnetize the CRT surface with the hand degausser , and
perform auto degaussing.
5. Attach the wobbling coil to the designated part of the CRT
neck.
6. Attach the sensor of the landing adjustment unit on the CRT
surface.
Purity magnet position
7. Adjust the DY position and purity, and the DY tilt.
8. Fasten DY with screw.
+2
Note: Torque 20 kgcm
-1
9. Adjust top and bottom pins by pitching DY up and down
with two wedges.
Also leave the yaw of DY to physical center position with
Another two wedes.
a
c
b
<How to drive in wedges>

ADJUSTMENTS

2
I C Interface Card
2
I C Interface Cable
HD15 Connector Adapter
"a" and "b" must be equal, and
d
"c" and "d" must be equal.
SECTION 4
Video Cable
L/D control specification
± 5
± 5
± 5
10. If the corner landing is out of specification, put a disk mag-
net for the landing correction.
11. Perform auto degauss in case disk magnets are used.
12. Remove the sensor and wobbling coil.
13. Fix purity magnet on DY with UL black tape.
4-1
± 7 ± 5
± 7 ± 5
± 7 ± 5
(µm)