ES6128
128M SDRAM
EPROM
16M FLASH
CPLD
ISP2064VE
ES7010
数据
输出
内 外
处 理
视频
输入
音频
输入
音频
ADC
WM8739
数据缓冲器
LVT244B
64M SDRAM
64M SDRAM
ES6128
128M SDRAM
128M SDRAM
EPROM
16M FLASH
CPLD
ISP2064VE
ES7010
A u d i o
ADCWM8739
Data Buffer
LVT244B
64M SDRAM
64M SDRAM
64M SDRAM
64M SDRAM
Data Buffer
LVT244B
Data
outpu
t
Video
input
In/out
buffer
Audio
input
V i d e o
d e c o d e r
SAA7114
A u d i o
s w i t c h
CD4052
V i d e o
output
Audio
output
Video
1
Video
2
S
video
TV
Tuner
Output
signal
I/O LVTH273
Panel
control
signal and others
D V D + R / R W
recorder chip
Video
1
Video
2
TV
signal
BSA-3800R Service Manual
Ⅰ
. Introduction of the Function
BSA-3800R is Digital recorder & player, it is the representative product in DVR
series of Wanlida. It can recorder the signal of video tape recorder or of vidicon or of TV
to be DVD disc. It supports recording DVD+R/RW discs. It composites two groups of
video input, one group of S-video, TV signal etc. Real time clock set , it can support
recording programs by presenting time, channel, times of channel and quality level. For
example, one DVD+R/W disc of 4.7G will cost 1 hour, 2hours, 3 hours and 4 hours
differently with different recording quality level.
BSA-3800R composites video, S-video, RCA video output, 5.1 CH, Optical, Coaxial
audio output. Built-in all range of TV frequency Tuner.
Ⅱ
. Schematic Diagram
BSA-3800R adopts NEC recorder chip ND-1100A, based on ATAPI jack. The
whole system based on ES7010, ES6128 decoder chip, input origin signal and TV
signal then transfer to digital signal by SAA7114 decoder. The digital signal will be
recorder DVD signal after dealing by ES7010 encoder. The following is the schematic
diagram of mainboard:
Figure 1
、
BSA-3800R mainboard schematic diagram
Send one group of Video 1, or Video 2, or S-video , or TV video signal to SAA7114
video decoder. SAA7114 is apply to the control aspect of video graphic array. It has six
groups of separated inputs. After interior software controlled and chosen the original
signal, video AD will be transferred to digital signal and output from 81-94 pin. The
digital video signal will be sent to ES7010 and ES6128 through the data buffer
LVT244B. When it enter into the outside source, digital video signal will be directly
outputted the video signal by ES6128 decoder. This way is called “direct signal”, it will
shorten the time of transferring between signal output and video output, and it can
avoid the complicated step of encoding and decoding to make the switch speed of TV
