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:
TV
S
Video
V i d e o
output
128M SDRAM
128M SDRAM128M SDRAM
Data Buffer
LVT244B
Data Buffer
数据缓冲器
LVT244B
LVT244B
Video
1
2
Output
signal
Tuner
video
V i d e o
d e c o d e r
SAA7114
A u d i o
ADCWM8739
ADC
音频
WM8739
64M SDRAM
64M SDRAM64M SDRAM
64M SDRAM
64M SDRAM64M SDRAM
Panel control
signal and others
Video
1
A u d i o
s w i t c h
CD4052
Video
2
TV
signal
Audio
output
ES6128
ES6128
EPROM
EPROM
CPLD
CPLD
ISP2064VE
ISP2064VE
16M FLASH
16M FLASH
D V D + R / R W
recorder chip
I/O LVTH273
ES7010
ES7010
Data
Video
数据
ou tp u
input
输出
t
In/ out
Audio
内 外
input
处 理
buffer
视频
输入
音频
输入
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
channel be faster. When it recording, the digital video signal will be recorded into
DVD+R/RW disc by ES7010 decoder, and then the decoded signal will be sent to
ES6128 decoder to output video signal. Three groups of audio signal will be chosen
one group to output at 3 and 13 pins through 4 groups multi output CD4052. The
chosen audio signal will be transferred into digital audio signal by stereo audio ADC that
integrated with WM8739. The digital audio signal will be sent to ES7010 decoder.
ES7010 is a MPEG2 audio&video encoding chip. The main frequency of ES70101 is
27MHz. In ES7010, there are one unit of video decoding&decoding transfer, digital
audio signal dealer, one CPU with 32 bits, one video input/output unit and one system
control unit. Depending on the function, it can use SDRAM. of 8M or 16M. The
following is the ES7010 interior diagram：
control
S e r i a l
interface
串
jack unit
接
单
Reset signal
GPIO
GPIO
data
数
Serial interface control
Saved data
存储数据
Time clock
signal
Audio input
音频输入
S D R A M
input unit
SDRAM
接口单元
PLL
PLL
in pu
输
t
入
V i d e o
视频输入单视频输出
input unit
Audio digital
音频数字
signal dealer
信号处理
装
output
输
出
V i d e o
o u t p u t
单
Interior CPU
内
Video encoding/
视频编码/编码转换单元
Encoding transfer
System control unit
绻统控制单元
data
数
据 制
Main CPU j ack
CPU
主
接口单元
unit
CPU
Figure
2、ES7010 interior diagram
ES6128 exchange data with ES7010 by ISPLSI 2064. ISP LSI2064 is a logic
equipment that can programme with high density. It including 64 registers, 32 universal
I/O jacks,4 special inputs, 3 special time clock inputs. It is integrated with input bus unit,
output bus unit and system bus unit. The main function of ISP LSI2064 is controlling the
input and output of separated I/O data by software. In whole system, it is used for
controlling and harmonize the data transfer among ES7010, ES6128 and recording
chip. When it loading a disc, the signal of chip communicating with ES6128. When it
recording a disc, ISP LSI 2064 controlling the communication among ES7010, ES6128
and recording chip.
I/0 5
Big module
Input bus unit
Output circuit assemble
B7 B6 B5 B4
I/0 0
I/0 1
I/0 2
I/0 3
I/0 7
I/0 6
I/0 4
TDO/IN0
TDO/IN1
BSCAN
In pu t
b u s
unit
O u t p u t
c i r c u i t
assemble
A0
A1
A2
A3
Mutual circuit
assemble
A4 A5 A6
Output circuit assemble
I/O 11
I/O 10
I/O 9
I/O 8
Input bus unit
I/O 12I/O13I/O 15I/O14
Figure 3、ISPLSI 2064 interior diagram
B3
B2
B1
B0
A7
CLK0CLK1CLK2
O u t p u t
c i r c u i t
In p ut
assemble
b u s
unit
I/0 23
I/0 22
I/0 21
I/0 20
I/0 19
I/0 18
I/0 17
I/0 16
GOE0/IN3
TMS/IN 2
ES6128 is a integration with single chip and MPEG video decoder. It
composites progressive video decoding function to make the picture more clear and
more real. The main frequency of it is 27MHz. ES6128 can deal the audio data signal
and can encode TV signal, it including 4 video DACs and supports Marovision anti-copy
function. At the same time, is has DVD system induct function, system control function
and manage function. It based on double CPU that is programmable multiplayer,
including 32 bits RISC, 64 bits DSP (digital signal processor). The double processor
can be connected through two separated data bus. Every processor has its own direct
memorizer DMA and outside memorizer jacks. When the system is encoding and
decoding, double processor can execute the system command and data dealing. It not
only supports parallel ATAPI chip ports but also supports serial ATAPI chip ports, this
will makes the audio/video data signal input be possible. The standard I2S audio data
will be input to DACs and output to ADCs. High speed EPROM, SDRAM command
access, audio/video data buffer. It supports DVD、SVCD, VCD1.1、VCD2.0、Karaoke
CD、MP3. Following is the interior diagram of ES6128:
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