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Nokia Display Products Oy
P.O.Box 14
FIN---24101 Salo, Finland
Chassis 446F

19" High Resolution Colour Monitor
446PRO

Contents
Service
Monitor Dismantling
Part List
PCB Part List
PCB Layout pictures

Level 1 1

Main Board module . . . . . . SMA241E SMA241H
CRT module . . . . . . . . . . . . . SMY052 SMY052

When re--- ordering manuals, please quote the model name and part number. ZB1680A
02.00
446F
Service
Contents
1. Product Overview
1.1. Technical Specifications
1.2. Certifications
1.2.1. Safety
1.2.2. EMC
1.2.3. X---ray, emissions, environmental, ergonomics
1.3. Preset Display Modes
1.4. S--Capacitor Table
1.5. Monitor Connection
1.6. User Controls
1.7. Menu
2. Site Preparation
2.1. Location
2.2. Troubleshooting
2.3. Checking the Operation of Power Saver
3. Controlling the Memory for Picture Adjustments
3.1. Memory for User Adjustments
3.1.1. Adjustment
3.1.2. Resetting the User Memory
3.2. Memory for Factory Adjustments
3.2.1. Adjustment
4. Service Mode
4.1. Grouping of the Adjustments
4.2. Service Menu
4.2.1. Access to the Service Mode
4.2.2. Geometry
4.2.3. Grey Scale
4.2.4. Memory settings and Initializing the Replacement IC (IC204 on SMA)
4.2.5. Storing Adjustments
4.2.6. Exit from Service Menu
5. Workshop Maintenance
5.1. Important Safety Notice
5.2. ESD--Sensitive Parts
5.3. Test Equipment
5.4. Test Patterns
5.5. Disassembly
6. Image performance
6.1. Image stabilising time
6.2. Colour temperature and tracking
6.3. White uniformity
6.4. Colour purity
6.5. Luminance
6.6. Image size
6.7. Linearity
6.8. Geometrical distortion
6.9. Jitter
7. Adjustment Procedure
7.1. Adjustment Flow Diagram
7.2. Preliminary Preparations
7.2.1. High Voltage
7.2.2. Coarse Width
7.3. Geometry
7.4. Grey Scale
7.4.1. The Most Dominant Colour
7.4.2. Low Light
7.4.3. High Light
7.5. Maximum/Minimum Contrast
7.6. Focus
7.7. Convergence
7.7.1. Measuring Conditions
7.7.2. Convergence Measuring Gauge

446F 1
7.7.3. Static Convergence
7.7.4. Dynamic Convergence
7.7.5. Allowed Error Levels for Convergence
7.8. Colour Purity
8. Screen and Faceplate Blemishes
8.1. Definitions of inspection conditions and terms
8.1.1. Standard observing condition
8.1.2. Zone division
8.1.3. Minimum distance beetween defects
8.1.4. Average diameter of defect
8.2. Face defect standard (black spot, stain)
8.3. Glass blemish
8.3.1. Scratch
8.3.2. Bubbles/foreign materials

Revision History
Rev Date Prepared by Comments
09.99 24.09.99
02.00 14.02.00 J. Paukku SMA241H added

2 446F
1. Product Overview
446F is a 19 inch monitor. The maximum resolution of 1600 x 1200 makes the monitor suitable for
PC, Macintosh and workstation applications in normally heated, ventialed and controlled office/home
environment. The monitor has an own power supply with nominal input voltage requirements from
90 V to 264 V.

1.1. Technical Specifications
Cathode Ray Tube . . . . . . . . . . 19" in diagonal 86