- 3 -
Important safety notice . . . . . . . . . . . . . . . . . . . 2
Safety precautions . . . . . . . . . . . . . . . . . 2
Leakage current cold check . . . . . . . . . . 2
Leakage current hot check . . . . . . . . . . . 2
X-ray radiation . . . . . . . . . . . . . . . . . . . . 2
High voltage (crt anode) . . . . . . . . . . . . . 2
Service notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Leadless chip component
(surface mount) . . . . . . . . . . . . . . . . . . . 4
Component removal . . . . . . . . . . . . . . . . 4
Chip component installation . . . . . . . . . . 4
How to replace flat-IC . . . . . . . . . . . . . . . 4
X-Ray protection circuit check
& adjustments . . . . . . . . . . . . . . . . . 5
Location of receiver controls . . . . . . . . . . . . . . 8
Quick reference . . . . . . . . . . . . . . . . . . . 8
Control operation . . . . . . . . . . . . . . . . . . 8
Disassembly for service . . . . . . . . . . . . . . . . . . 9
Back cover . . . . . . . . . . . . . . . . . . . . . . . 9
A-Board -- main chassis . . . . . . . . . . . . . 9
C-Board -- CRT output . . . . . . . . . . . . . . 9
Z-Board -- (some models) . . . . . . . . . . . 9
DI-Board -- (some models) . . . . . . . . . . . 9
speakers . . . . . . . . . . . . . . . . . . . . . . . . . 9
Keyboard push button assembly . . . . . . 9
Disassembly for CRT replacement . . . . . 9
CRT replacement . . . . . . . . . . . . . . . . . . 9
Chassis service adjustment procedures. . . . 10
130.0V B+ voltage confirmation . . . . . . 10
Source voltage chart. . . . . . . . . . . . . . . 10
High voltage check . . . . . . . . . . . . . . . . 10
Purity and convergence procedure . . . . . . . . .11
For a 2-piece assembly . . . . . . . . . . . . .11
For a 1-piece assembly . . . . . . . . . . . . .11
Vertical raster shift adjustment . . . . . . . .11
initial center static convergence . . . . . . .11
For a 2-piece assembly . . . . . . . . . . . . 12
For a 1-piece assembly . . . . . . . . . . . . 12
Permalloy convergence corrector
strip (part No. 0FMK014ZZ) . . . . . . 12
Service mode (electronic controls) . . . . . . . . 14
Quick entry to service mode . . . . . . . . . 14
To toggle between aging and
service modes . . . . . . . . . . . . . . . . 14
Entering service mode
(back-open method) . . . . . . . . . . . . 18
Sub-Contrast . . . . . . . . . . . . . . . . . . . . 21
Sub-Brightness . . . . . . . . . . . . . . . . . . . 21
Tint/Color adjustment . . . . . . . . . . . . . . 21
White balance . . . . . . . . . . . . . . . . . . . . 21
Sub-Brightness final adjustment . . . . . . 22
Horizontal centering . . . . . . . . . . . . . . . 22
Vertical size . . . . . . . . . . . . . . . . . . . . . 23
MTS circuit adjustments . . . . . . . . . . . . 23
Input level adjustment (M00) . . . . . . . . 23
Stereo separation adjustment
(M01 & M02) . . . . . . . . . . . . . . . . . 23
Clock adjustment (X03) . . . . . . . . . . . . 23
Service adjustments
(mechanical controls) . . . . . . . . . . . 24
focus (part of T551) . . . . . . . . . . . . . . . 24
Identification of components . . . . . . . . . . . . . 28
Audio signal path block diagram . . . . . . . . . . 30
Video signal path block diagram . . . . . . . . . . 31
Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Components abbreviations guide . . . . . . . . . 46
Schematic notes . . . . . . . . . . . . . . . . . . . . . . . 47
A-Board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
A-Board schematic
(left portion CT-2022HE/HCE) . . . . . . . . . . . . . . . .50
A-Board schematic
(right portion CT-2022HE/HCE) . . . . . . . . . . . . . . .51
A-Board schematic
(left portion CT-2512HE/HCE) . . . . . . . . . . . . . . . .52
A-Board schematic
(right portion CT-2512HE/HCE) . . . . . . . . . . . . . . .53
A-Board schematic
(left portion CT-2522HE/HCE) . . . . . . . . . . . . . . . .54
A-Board schematic
(right portion CT-2522HE/HCE) . . . . . . . . . . . . . . .55
A-Board schematic
(left portion CT-2722HEHCE). . . . . . . . . . . . . . . . .56
A-Board schematic
(right portion CT-2722HEHCE). . . . . . . . . . . . . . . .57
A-Board schematic
(left portion CT-3222HE/HCE) . . . . . . . . . . . . . . . .58
A-Board schematic
(right portion CT-3222HE/HCE) . . . . . . . . . . . . . . .59
C-Board layout, schematic & voltages. . . . . . . . . . . .60
Z-Board layout, schematic & voltages,
C-Board schematic . . . . . . . . . . . . . . . . . . . . . . . . . .61
DI-Board layout, schematic & voltages . . . . . . . . . . .62
A-Board voltages and waveforms . . . . . . . . . . . . . . .63
Содержание CT2022HE - 20" HOTEL/MOTEL TV
Страница 49: ... 49 Todos los Modelos All Models Diagrama Impreso Tarjeta A A Board Layout ...
Страница 50: ... 50 CT 2022HE HCE Diagrama Eléctrico Tarjeta A Porción Izquierda A Board Schematic Left Portion ...
Страница 51: ... 51 CT 2022HE HCE Diagrama Eléctrico Tarjeta A Porción Derecha A Board Schematic Right Portion 6 3A 125V ...
Страница 52: ... 52 CT 2512HE HCE Diagrama Eléctrico Tarjeta A Porción Izquierda A Board Schematic Left Portion ...
Страница 53: ... 53 CT 2512HE HCE Diagrama Eléctrico Tarjeta A Porción Derecha A Board Schematic Right Portion 6 3A 125V ...
Страница 54: ... 54 CT 2522HE HCE Diagrama Eléctrico Tarjeta A Porción Izquierda A Board Schematic Left Portion ...
Страница 55: ... 55 CT 2522HE HCE Diagrama Eléctrico Tarjeta A Porción Derecha A Board Schematic Right Portion 6 3A 125V ...
Страница 56: ... 56 CT 2722HE HCE Diagrama Eléctrico Tarjeta A Porción Izquierda A Board Schematic Left Portion ...
Страница 57: ... 57 CT 2722HE HCE Diagrama Eléctrico Tarjeta A Porción Derecha A Board Schematic Right Portion 6 3A 125V ...
Страница 58: ... 58 CT 3222HE HCE Diagrama Eléctrico Tarjeta A Porción Izquierda A Board Schematic Left Portion ...
Страница 59: ... 59 CT 3222HE HCE Diagrama Eléctrico Tarjeta A Porción Derecha A Board Schematic Right Portion ...
Страница 64: ... 64 NOTES ...
Страница 65: ... 65 NOTES ...
Страница 66: ... 66 Printed in USA K01082223PL0801 ...
