akira 21BHS3/CE User manual

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Model No: 21BHS3CE
Version 1.0
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Model No: 21BHS3CE
Version 1.0
CONTENT
SPECIFICATION .................................................................................................................................... 4
THE SURVEY ......................................................................................................................................... 5
SIGNAL PROCESS ................................................................................................................................. 6
HORIZONTAL AND VERTICAL CIRCUIT ......................................................................................... 7
IC ILLUSTRATION ................................................................................................................................ 8
FACTORY MENU................................................................................................................................. 15
CIRCUIT DIAGRAM............................................................................................................................ 19
EXPLODED VIEW AND PART NAME .............................................................................................. 20
BOM LIST ............................................................................................................................................. 21

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Model No: 21BHS3CE
Version 1.0
SPECIFICATION
Rated Voltage AC 140V~250V 50Hz/60Hz
Sound output: 5W×2
Screen size Picture tube 54cm
RF PAL
Color AV NTSC
System:
Sound B.G
VHF Low channel (VL) =48.25 to 147.25 MHz
VHF high channel (VH) =154.25 to 463.25 MHz
Channel coverage:
UHF channel (U) =471.25 to 863.25 MHz
IF 38.9 MHz
Video/Audio (L/R) 2set input
YUV input
S-Video input
External input/output
Video/ Audio (L/R) 1 set output
 I2C Bus Control
 Auto Search
 Off/On Timer
 Teletext

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Model No: 21BHS3CE
Version 1.0
THE SURVEY
Table 1, the main IC and functions
Number Function IC Remark
1 Power supply KA5Q0765RT N611
2 CPU + SIGNAL PROCESSER OM 8370 /TDA9370 N301
3 Field driver STV9302A N401
4 Sound driver AN7522N N161
5 AV SWITCH TC4052BP N801 (Video)
N121 (sound)
6 Memory AT24C08 N702
7 Photo-coupler HS817B N504
8 IR-receiver HS0038A N1503
9 8V regulator L7808CV N503
10 5V regulator L7805CV N505