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6 Alignments and Adjustments
This section of the service manual explains how to control the linearity, raster, size, position, pincushion,
parallelogram, trapezoid, and pinbalance. Additionally, this section describes how to use the micom control
jig to make the adjustments.
6-1 Adjustment Conditions
Warning: Changes made without the micom jig are saved only to the user mode settings. As such, the
settings are not permanently stored and may be inadvertently deleted by the user.
Power Supply Voltage
AC 90 ~ 264 volt (60/50 Hz+3 Hz).
High Voltage Control
Adjust VR501 to 25 kV+0.2 kV.
Note: When using PHILIPS CRT, set the high
voltage to 24+0.2 kV.
Testing and Burn-in Mode
For testing and burn-in, remove the signal cable
from the monitor. Power on the monitor and
warm it up. Use the burn-in mode to age
the monitor.
Warm-Up Time
The display must be on for 30 minutes before
starting alignment. Warm-up time is especially
critical in color temperature and white balance
adjustments.
Signal
Video analog 0.714 Vp-p positive at 75 ohm
terminated.
Sync: Separate /composite
(TTL level negative/positive).
Scanning Frequency
Horizontal : 30 kKHz-65 kHz (Automatic).
Vertical
: 50 Hz-120 Hz (Automatic).
Unless otherwise specified, adjust to 640x480
mode (H : 37 kHz,
V: 75 Hz) signals. Refer to
table 4-1 on page 4-1 and 4-2.
6-2 Prepare Main PCB for Adjustment
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+B 85 V Line Adjustment
(No beam, Contrast: Min, Brightness: Min)
Adjust VR601 to be DC 85 V+1 V at TP601 and
GND.
High Voltage Adjustment
(No beam, Contrast: Min, Brightness: Min)
Adjust VR501 to 25 kV+0.2 kV (For other CRTs).
Adjust VR501 to 24 kV+0.2 kV (For PHILIPS CRT).
Samsung Electronics SyncMaster 15GLi
Horizontal Raster Center
Adjust SW401 so that the back raster comes to the
center when you apply a signal of 37 kHz/75 Hz.
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