SERVICE MANUAL
3
.
CHASSIS DESCRIPTION
General Description
CN-18ED chassis is applied in PF2939E. By use of Toshiba V/C/D-MCU 2IN1 IC for TV small
signal processing and bus control, the chassis enables TV tuning, adjustment, control and
picture correction, featuring high-integration, high-performance-to-price ratio and high-reliability
and compact circuit with fewer external components. The chassis, widely used in small and
medium TVs, provides much more convenience for manufacturing and technical service. It
includes:
2IN1 IC TMAP8827PSNG with function of E/W correction for PAL/NTSC/SECAM small
signal processing and bus control
EEPROM AT24C16 for data memory
LA78040 /LA78041for vertical output power amplifying
TDA8944J (mono) for audio power amplifying
Thick-film IC STR-G8656 for power circuit adjustment and control
AV control
TC90L01N
The following features are available in the chassis:
Color systems: PAL/ SECAM
Sound systems: D/K B/G
236 programs preset
Multilingual on screen display
I
2
C bus control
NICAM/AV stereo
Selectable picture/sound modes
Intelligent lock
Message board
Telephone directory
Game
Biorhythm
Calendar inquiry
The chassis mainly uses the following ICs and assemblies.
Table 5 Key ICs and Assemblies
Serial No. Position
Type
Description
1 N230
AT24C016
EERPOM
2
N210
CH08T0605 (TMPA8827PSNG)
2IN1 IC (Small signal pro micro control (UOC))
3
N603
TDA8944J
Stereo audio power amplifier
4
N301
LA78040/LA78041
Vertical scan output stage circuit
5
N801
STR-G8656
Switch-mode power supply control
6 N901
TC90L01N
AV
switch
7 A101
TDQ-5B6-M
Tuner
20
Содержание 29CT24FS
Страница 1: ...SERVICE MANUAL Models 29CT24FS 29CT71FS www akai ru COLOUR TV SET ...
Страница 25: ...SERVICE MANUAL 2 Block Diagram Fig 7 Block diagram 23 ...
Страница 32: ...SERVICE MANUAL 4 Pinning information 4 1 Pinning Fig 10 Pin configuration 30 ...
Страница 41: ...SERVICE MANUAL 3 Pin Assignment Fig 19 Pin assignment 39 ...
Страница 49: ...APPENDIX CIRCUIT DIAGRAM 1 JUC7 820 1117 ...
Страница 50: ...CIRCUIT DIAGRAM 2 JUC7 820 1014 8 5 JUC7 820 1151 CRT RGB SIDE AV BOARD ...
Страница 53: ...PRINTED CIRCUIT BOARD DIAGRAMS MAIN ...
Страница 54: ...CRT RGB PRINTED CIRCUIT BOARD AV PRINTED CIRCUIT BOARD ...
Страница 55: ...POWER PRINTED CIRCUIT BOARD ...