ViewSonic G220f-1 User manual

Service Manual
ViewSonic G220f-1
Model No. VCDTS23852-1M
21” Digital Controlled Color Monitor
(G220f-1_G220fB-1_SM Rev. 1b Mar. 2006)
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
G220fB-1
VCDTS23852-2M

ii
Copyright
Copyright
¤
2006by ViewSonic Corporation. All rights reserved. No partof this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time
to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or
changes.
Trademarks
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision Date Description Of Changes Approval
1a 5/23/02 Initial Release DCN-2248 K.Yang
Confidential – Do Not Copy
ViewSonic Corporation G220f-1_G220fB-1
1b 3/30/06
Modify model number of cover page Jamie Chang

ViewSonic Corporation iii
TABLE OF CONTENTS
1. PRECAUTIONS AND NOTICES...............................................................................1
2. SPECIFICATIONS.....................................................................................................4
3. FRONT PANEL FUNCTION CONTROL DESCRIPTION....................................16
4. CIRCUIT DESCRIPTION........................................................................................19
5. BLOCK DIAGRAM .................................................................................................24
6. SCHEMATIC DIAGRAMS.......................................................................................25
7. ADJUSTING PROCEDURE....................................................................................41
8. TROUBLE SHOOTING FLOW CHART..................................................................51
9.EXPLODED DIAGRAM AND SPARE PARTS LIST...............................................57
Confidential – Do Not Copy
10.DISASSEMBLY INSTRUTCTION............................................................................59
11.PCB LAYOUT DIAGRAMS......................................................................................61
12.RECOMMEND SPARE PARTS LIST.......................................................................63
G220f-1_G220fB-1

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1. PRECAUTIONS AND NOTICES

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ViewSonic Corporation 2Confidential – Do NotCopy
G220f-1_G220fB-1

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ViewSonic Corporation 3Confidential – Do NotCopy
G220f-1_G220fB-1

1.0 SCOPE
This specification defines the performance of C110 SAW 21inch digital OSD controlled color monitor. This color monitor
is designed to accept timing signals within horizontal frequency ranging from 30KHz to 110KHz and vertical frequency
ranging from 50Hz to 180Hz. It is compatible with VGA, super VGA, and enhanced VESA standards for 640x480,
800x600, 1024x768, 1280x1024 and 1600x1200 non-interlaced display. All parameters within this specification must be
met at any line voltage, line frequency and temperature within the limits specified in this document.
2.0 GENERAL PERFORMANCE
2.1 Display mode & resolution
15 settings of display parameters are pre-adjusted and stored in memory for user’s convenience, another 10 settings
of memory are available for user to adjust and store parameters.
PRESET MODE FREQUENCY SYNC POLARITY
RESOLUTION HOR. VER. HOR. VER.
640x400 31.47KHz 70Hz - +
640x480 31.47KHz 60Hz - -
640x480 43.269KHz 85Hz - -
800x600 46.875KHz 75Hz + +
800x600 53.674KHz 85.01Hz + +
1024x768 60.24KHz 74.927Hz + +
1024x768 60.023KHz 75.029Hz + +
1024x768 68.677KHz 84.997Hz + +
1280x1024 79.976KHz 75.025Hz + +
1280x1024 91.146KHz 85.024Hz + +
1600x1200 93.750KHz 60.00Hz + +
832x624 49.714KHz 75.534Hz - -
1152x870 68.681KHz 75.061Hz - -
1600x1200 106.25KHz 85Hz + +
2.2 Scanning Frequency ：30KHz to 110KHz for Horizontal
50Hz to 180Hz for Vertical
2.3 Display Size ：390mm x 290mm for all modes
2.4 Display Brightness ：30±3 FL at center of screen (Full white pattern)
33±3 FL at center of screen (20% window block pattern)
(Brightness set to 50% & Contrast set to 100%)
2.5 White Balance ：CIE coordinates
9300K
x = 0.283±0.015
y = 0.297±0.015
6500K
x = 0.313±0.015
y = 0.329±0.015
5000K
x = 0.346±0.015
y = 0.359±0.015
2.6 Power Input Range ：AC 90 to 264V, 50/60Hz ± 3Hz
2.7 Power Consumption ︰115 Watts max.
2.8 Degauss ：both Automatic and Manual
ViewSonic Corporation 4Confidential – Do NotCopy
2. SPECIFICATIONS
G220f-1_G220fB-1

2.9 Display Data Channel ︰DDC1/2B
2.10 Mechanical Adjustment ：with Tilt & Swivel base
2.11 Display controls ：a. Power on/off switch
b. Digital On Screen Display controls`
Contrast Brightness
Horizontal size Horizontal Position
Vertical size Vertical Position
Zoom
Pincushion Pin Balance
Trapezoid Parallel
Top Hook Bottom hook
Tilt H/V Convergence
Degauss
H- moiré V- moiré
Color ( 9300, 6500 5000 , user color )
Input level
Language
OSD H-position OSD V-position
View meter
Memory recall Exit
ViewSonic Corporation 5Confidential – Do NotCopy
G220f-1_G220fB-1

3.0 REGULATORY REQUIREMENT
3.1 Safety Approvals
The unit design shall meet the standards of the following domestic and foreign agencies:
UL listed ：UL1950 listing (Information processing and business equipment)
CSA ：CSA C22.2 No.950 (Information technology equipment)
TUV ：EN60950 ( for business machines)
TUV/GS ：EN60950/EKI/ISO 9241-3,-7,-8
IEC Standard ：IEC 60950 (Information technology and business equipment)
MPRII ：MPR 1990：8 / MPR 1990：10
TCO99 (OPTION) ︰July, 1998 / Emission, Energe
3.2 EMI Emission Approvals
The unit shall meet following EMI specifications.
FCC Compliance ：FCC Rules and Regulations, Part 15, sub-part J, Class B
CE ︰EN55022, EN55024
3.3 DHHS
The unit must comply with all applicable radiation limit and labeling and licensing requirement of DHHS Rule 21
CFR Sub-chapter J for X-ray radiation limits.
ViewSonic Corporation 6Confidential – Do NotCopy
G220f-1_G220fB-1

4.0 INTERFACE REQUIREMENT
4.1 Power input requirements
4.1.1 Operating voltage range：90 ~ 264VAC , 50/60 ± 3Hz
4.1.2 Input Current at 120V
a. Operating ：2.0Amps RMS maximum
b. Inrush current ：40 Amps peak maximum
4.1.3 Input Current at 240V
a. Operating ：1.0 Amps RMS maximum
b. Inrush current ：60 Amps peak maximum
4.1.4 Power management
MODE H-SYNC V-SYNC POWER INDICATOR
NORMAL YES YES ≦115W GREEN
Power saving NO YES ≦10W AMBER
Power saving YES NO ≦10W AMBER
Power saving NO NO ≦2W AMBER
4.2 Signal Input Requirement
4.2.1 Connector
a. 15 pin D-sub high-density connector for video and sync signals. (See Appendix A for pin assignment)
b. Cable length ︰1.8meters with ivory color.
4.2.2 Video Signals
a. Red, Green, Blue channels analog input.
b. Amplitude ：0.7Vp-p/1Vp-p(OSD SLECT)
c. Polarity ：Positive bright, 0.7Vp-p for full intensity and 0Vp-p for black.
d. Impedance ：75 ohms±5%
4.2.3 Sync signal
a. Separate H and V sync or composite H+V sync.
b. Voltage level ︰Standard TTL
c. Input impedance ︰2KΩ
d. Polarity ︰Negative or Positive.
ViewSonic Corporation 7Confidential – Do NotCopy
G220f-1_G220fB-1