Sharp VT-2198B Manuals

Manuals and User Guides for Sharp VT-2198B. We have 1 Sharp VT-2198B manual available for free PDF download: Service Manual

Sharp VT-2198B Service Manual

Sharp VT-2198B Service Manual (111 pages)

Video TV

Brand: Sharp | Category: CRT TV | Size: 4.79 MB

Table of Contents

Contents
1
Specifications
2
Important Service Notes
3
Servicing of High Voltage System and Picture Tube
3
X-Ray
3
Before Returning the Receiver
3
Disassembly and Reassembly
4
TV Section
4
VCR Section
5
Adjustment of the TV Electrical Circuitry
6
Chassis Layout
6
Video/Chroma Adjustment
7
CRT Cut-Off Adjustment
7
White Balance and Back Ground Adjustment
7
Sub-Contrast Adjustment
8
PAL Chroma Adjustment
8
Sub-Tint Adjustment
9
PAL Sub-Colour Adjustment
9
Bell Filter Adjustment
9
SECAM Killer Adjustment
10
R-Y/B-Y Discriminator Adjustment
10
Deflection Loop Adjustment
11
Focus Adjustment
11
Horizontal Center Adjustment
11
Vertical Linearity Adjustment
11
CRT Display Adjustment
12
Vertical Size Adjustment
12
Vertical Centering Adjustment
12
Sign Position Adjustment
12
Purity Adjustment
13
Adjusting Conditions
13
Convergence Adjustment
14
Static Convergence
14
Dynamic Convergence
14
Adjustment of the VCR Electrical Circuitry
15
Adjustment of Power Circuit
15
Test Points Layout
15
Adjustment of Servo Circuit
16
Adjustment of PAL System Playback Switching Point
16
Adjustments of NTSC System Playback Switching Point
16
Adjustment of PAL System Slow Tracking
17
Adjustment of PAL System Still Picture Vertical Sync
17
Adjustment of NTSC System Still Picture Vertical Sync
17
Adjustment of Audio Circuit
18
Checking of Playback Level
18
Adjustment of Bias Current
18
Checking of Erase Voltage and Oscillation Frequency
18
Adjustment of Y/C Circuit
19
Adjustment of EE Level
19
Adjustment of Recording Current
20
Adjustment of Y/C Playback Circuit
21
Adjustment of the if Circuit
21
Adjustment of Playback Video Signal Level
21
Adjustment of the AFT
21
Overall Wiring Diagram
43
Overall Block Diagram
45
Servo Process Block Diagram
46
System Control Block Diagram
47
Safety Device Block Diagram
47
Luminance/Chrominance Block Diagram
48
Audio Block Diagram
49
Timer Block Diagram
50
Block Diagram
51
Description of Schematic Diagram
52
Waveforms
52
Voltage Measurement Conditions
52
Important Safety Notice
52
System Control / Servo Circuit
53
Main Circuit
54
Y/C Circuit
55
Head Amplifier Circuit
56
VCR Power Circuit
57
Audio Circuit
58
Operation Circuit
58
Mother/Crt Circuit
59
Mother/Crt/Line Filter Circuit
60
Timer/Control Circuit
61
IF Pack Circuit
62
Tuner Circuit
63
Infrared Remote Control Circuit
63
Printed Wiring Board Assemblies
64
Parts List
71
Electrical Parts
71
Picture Tube
71
VCR Section Mechanism Chassis Parts
96
Cassette Housing Control Parts
99
VCR Section Mechanical Parts
101
TV Section Mechanical Parts
103
Packing of the Set
109
Setting Positions of the Knobs
109

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