19” CDT Color Monitor 109B7
1
Service
Service
Service
Horizontal Frequency
30-92 kHz
Table of contents
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE
NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
3138 106 10540
Table Of Contents...............................................1
Revision List.......................................................2
Important Safety Notice.................................3
1. Specifications..........................................4
2. Precaution and Notices................................7
2-1Safety Precautions....…...............…..............7
2-2 Product Safety Notice .......................................8
2-3 Service Notices....................…………......8
2-4 High Voltage Warning......................................8
3. Operating Instructions.................………............9
4. Adjustment ............................…………………....10
4 -1. Adjustment Conditions and Precautions .......10
4-2. Main Adjustments..............................10
4-3 Adjustment Methods........................................12
4-4
DDC Instructions
....................…………...............17
5.Circuit Description ..………………………............22
5-1.Micro Controller and Deflection Circuit ..........22
5-2.Transistor & Diode Circuit...............................24
6.Mechanical Instructions…………………...….……25
7. Trouble Shooting Chart........................…...........28
7-1.
No Power (No voltage)......………………….........28
7-2. No Picture
（
The Relative Scan Circuit
）
……...29
7-3 No Raster
（
CRT Relative Circuit Problem
）
......30
7-4 Abnormal Display(The Relative Video Amplifying
Circuit)……………………………………………………31
7-5. No Horizontal Blanking.................................32
7-6. A Horizontal Bright Trace…........................32
7-7. Abnormal Horizontal Size Function……….........33
7-8. Abnormal Vertical Size....…………..................34
7-9. Focus Failure......…………………………...........34
8. Mechanical of Cabinet Front Dis-Assembly..........35
9. Spare Parts List...........………….............................36
10. Differen parts list...................................................50
11. Block Diagram..................……..........................58
12. IC Block Diagrams..........…..................................59
13. PCB Layout............…………................................64
13-1 Main Board PCB Layout.....................................64
13-2 CRPC Board Layout.........................................65
14. Schematic Diagram.........................................66
15. General Product Specification…………………70
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
GB
Summary of Contents for 109B7
Page 21: ...19 CDT Color Monitor 109B7 21 Step 5 Enter into Fig 8 Fig 8 Step 6 Enter into Fig 9 Fig 9 ...
Page 35: ...19 CDT Color Monitor 109B7 35 8 Mechanical of Cabinet Front Dis Assembly ...
Page 58: ...19 CDT Color Monitor 109B7 58 11 Block Diagram ...
Page 60: ...19 CDT Color Monitor 109B7 60 SAA4849 ...
Page 64: ...19 CDT Color Monitor 109B7 64 13 PCB Layout 13 1 Main Board PCB layout ...
Page 65: ...19 CDT Color Monitor 109B7 65 13 2 CRPC Board Layout ...
