Adjustment Procedures; Inspection - NEC MultiSync FP1350 Service Manual

ADJUSTMENT PROCEDURES

Application
These specifications outline the adjustment procedures for Model FP1350-1 22 inch color monitor.
Model :
Standard Adjustment Conditions
1. Power Supply Voltage
2. Warm Up
Adjust this monitor after a minimum of 90 minutes to allow unit to reach ambient operating temperature.
(Use the Self Test screen. Refer item 7-5-3. about Self Test. )
* Adjust the monitor according to item "Rough Adjustment before warm up" before warm up.
* When aging, cover with back cabinet or aging jig.
3. Signals
Unless otherwise specified, inspection should be Mini D-SUB 15 pins.
Video: Analog 0.7±0.01 Vp-p Positive polarity (terminated at 75 ohms ±1%)
or
Analog sync. on green
Video 0.7±0.01 Vp-p positive polarity
Sync 0.3±0.01 Vp-p negative polarity (terminated at 75 ohms ±1%)
Sync.: TTL level (High level: more than 2.4V / Low level: less than 0.8V)
H/V separate, positive / negative polarity
or
H/V composite, positive / negative polarity
or
Sync. on green, 0.3±0.01 Vp-p negative polarity (terminated at 75 ohms ±1%)
4. Magnetic Fields
Vertical Magnetic Fields: 40±1µT
* Unless instructed otherwise, the CRT face should be facing to the east.
* Degauss the entire unit with an external degaussing coil for the adjustment.
* Notes about degaussing method
Follow the degaussing procedure below. (To prevent intertwinement of aperture grille)
1) Use cylinder-shaped degaussing coil. Do not use ring degaussing coil. But ring degaussing coil can be used at
degaussing chassis.
2) In order to remove a magnetization from top sides, base shield and chassis, degauss each side.
Do not switch off the degaussing coil abruptly. Move the degaussing coil slowly when degaussing.
Note: If the degaussing coil is switched off near the set, the set will be magnetized.
FP1350-1
Destination: Europe Standard Adjustment Conditions
AC 100V±5% 50/60Hz or AC 120V±5% 60Hz or AC 220V±5% 50Hz
Horizontal Magnetic Fields: 30±1µT
5-1