Adjustments - Compaq P900 Service Manual

P900
Connect the communication cable of the connector located on the D board on the monitor. Run the service software and then follow
these instructions.
IBM AT Computer
as a Jig
Allow a 30 minute warm-up period prior to making the following adjustments:
3-1. Landing Rough Adjustment
1. Enter the full white signal.
2. Adjust the contrast to the maximum.
3. Input full green signal.
(Note: Turn off the outputs from R ch and B ch of SG)
4. Move the DY backward and adjust the purity magnet so that a
green raster positions in the center of screen.
5. Moving the DY forward, adjust so that an entire screen
becomes pure green.
6. Adjust DY Tilt, use TLV of DY for this adjustment. Adjust the
Register "TILT" to 0.
7. Lightly tighten the DY screw.
3-2. Landing Fine Adjustment
1. Place the set in the Helmholtz coil.
2. Set TLH plate to the zero position.
3. Adjust Purity Magnet on the Neck Assembly to zero position
and secure it with white pin.
4. Set "VPIN SAW TOP" and "VPIN SAW BTM" to zero
position.
5. Display a plain green pattern.
6. Degauss CRT and shield with hand-degausser.
7. Perform auto-degauss.
8. Attach a wobbling coil to the specified position of CRT.
9. Attach a landing adjuster sensor on the CRT.
10. Using a landing checker, adjust the DY position, purity,
tilt of DY.
11. Tighten the DY screw.
Clamping torque: 22 ± 2 kg.cm (2.2 ± 0.2 N.m)
12. Perform auto-degauss.
13. Adjust top and bottom pin pitching DY with two wedges so
that (a) is equal to (b)(see the figure at top of next column).
Also, leave the yaw of DY to the physical center position with
another two wedges.

ADJUSTMENTS

1 1-690-391-21 2 A-1500-819-A
Interface Unit
D-sub mini Din
(9 Pin [female]) (8Pin)
*The parts above ( ~ ) are necessary for DAS adjustment.
1 3
SECTION 3
3 3-702-691-01
Connector Attachment
To BUS CONNECTOR
4 Pin 4 Pin 4 Pin
Fasten wedges so that DY does not move.
14. If landing does not meet specifications, correct with a
disc magnet.
15. Perform auto-degauss.
16. Remove sensor and wobbling coil.
17. Confirm that there is no DY tilt. Affix purity magnet on
DY using white paint.
3-3. Convergence Rough Adjustment
1. Enter the white crosshatch signal.
2. Roughly adjust the H. STAT and V. STAT with a
four-pole magnet.
3. Roughly adjust HMC and VMC with a six-pole magnet.
3-4. Convergence Fine Adjustment
1. Display crosshatch pattern with R and B.
2. Adjust H. STAT and V. STAT with 4-pole magnet.
(Do not adjust H.STAT and V.STAT with resistor.)
TLV VR (Unused)
CRT
DY
XCV Core TLH Plate
— 8 —
a
b
2 Pole
6 Pole Mg
A Board
Neck Assy
2 Pole (Unused)
4 Pole Mg