Alignment And Adjustments; Adjustment Conditions - Samsung CHB5707L/5237L Service Manual

6 Alignment and Adjustments

This section of the service manual explains how to make permanent adjustments to the monitor. Directions
are given for adjustments using the monitor Interface Board Ver. 2.0 and software (SoftJig).

6-1 Adjustment Conditions

Caution: Changes made without the SoftJig are saved only to the user mode settings. As such, the
settings are not permanently stored and may be inadvertently deleted by the user.
6-1-1 Before Making Adjustments
6-1-1 (a) ORIENTATION
When servicing, always face the monitor to the
east.
6-1-1 (b) MAGNETIC FIELDS
Whenever possible, use magnetic field isolation
equipment such as a Helmholtz field to surround
the monitor. If a Helmholtz field is not available,
frequently degauss the unit under test.
Caution: Other electrical equipment may cause
external magnetic fields which may
interfere with monitor performance.
Use an external degaussing coil to limit magnetic
build up on the monitor. If an external degaussing
coil is not available, use the internal degaussing
circuit. However, do not use the internal
degaussing circuit more than once per 30 minutes.
6-1-1 (c) WARM-UP TIME
The monitor must be on for 30 minutes before
starting alignment. Warm-up time is especially
critical in color temperature and white balance
adjustments.
6-1-1 (d) SIGNAL
Analog, 0.714 Vp-p positive at 75 ohm, internal
termination
Sync: Separate
(TTL level negative/positive)
6-1-1 (e) SCANNING FREQUENCY
Horizontal: 30 kHz to 70 kHz (Automatic)
Vertical: 50 Hz to 160 Hz (Automatic)
Unless otherwise specified, adjust at the
16Ó/17Ó: 1024 x 768 mode (68 kHz/85 Hz),
15Ó: 800 x 600 mode (54 kHz/85 Hz) signals.
Refer to Table 3-1 on page 3-3.
CHB5**7L/6**7L/7**7L
6-1-2 Required Equipment
The following equipment may be necessary for
adjustment procedures:
6-1-2 (a) DISPLAY CONTROL ADJUSTMENT
1. Non-metallic (Ð) screwdriver: 1.5 mm
Non-metallic (Ð) screwdriver: 3 mm
2. Philips (+) screwdriver: 1.5 mm
3. Non-metallic hexkey: 2.5 mm
4. Digital Multimeter (DMM), or
Digital Voltmeter (DVM)
5. Signal generator, or
Computer with a video board that uses the
ET-4000 chipset (strongly recommended if
using Samsung DM 200 software) and that
displays: 1024 x 768 @ 85 Hz, or 800 x 600
@ 85 Hz (minimum).
6. Personal computer
7. Required software: Softjig.exe from Samsung
which includes the cg17e.c data file
Samsung DM200, or DisplayMate for
Windows from Sonera Technologies
8. Interface Board Ver. 2.0 Code No.
BH81-90001K
9. Parallel communications cable (25-pin to
25-pin); Code No. BH81-90001H
10. Signal cable (15-pin to 15-pin cable with
additional 3-pin connector); Code No.
BH81-90001J
11. 5 V DC adapter, not supplied
Note: SoftJig AssÕy (includes items 8, 9 and 10)
Code No. BH81-90001L
6-1-2 (b) COLOR ADJUSTMENTS
1. All equipment listed in 6-1-2 (a), above
2. Color analyzer, or any luminance
measurement equipment
6-1