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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:
V i d e o
128 M SDRAM
128 M SDRAM
128 M SDRAM
output
ES6128
ES6128
Audio
output
EPROM
EPROM
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
BSA-3800R Service Manual
Data Buffer
LVT244B
CPLD
CPLD
ISP2064VE
ISP2064VE
D V D + R / R W
recorder chip
I/O LVTH273
16 M FLASH
16 M FLASH
Data
Buffer
数据缓冲器
LVT244B
LVT244B
V i d e o
ES7010
ES7010
d e c o d e r
SAA7114
Data
Video
数据
视频
outpu
input
输出
输入
t
A u d i o
In/out
Audio
ADCWM8739
内 外
音频
音频 ADC
input
处 理
输入
WM8739
buffer
64 M SDRAM
64 M SDRAM
64 M SDRAM
64 M SDRAM
64 M SDRAM
64 M SDRAM
Panel
control
signal and others
S
TV
Video
Video
video
Tuner
1
2
Output
signal
A u d i o
s w i t c h
CD4052
Video
Video
TV
1
signal
2
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Summary of Contents for Belson BSA-3800R
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Page 1: Schematic Diagram
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. - Page 2 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.
- Page 3 I/0 5 Input bus unit Output circuit assemble Big module I/0 0 I/0 23 O u t p u t I/0 1 I/0 22 c i r c u i t I n p u t I/0 2 I/0 21 I n pu t Mutual circuit...
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Page 4: Reset Circuit
SDRAM DSCK_EN DSCK_EN DSCK DSCK LA[21:0] LA[21:0] DCS#[1:0] DCS#[1:0] DRAM DRAM LCS#[3:0] LCS#[3:0] SDRAM DMA[11:0] DMA[11:0] LD[15:0] LD[15:0] JACK DWE# DWE# JACK 接口 接口 DOE# DOE# LWRHL# LWRHL# DRAS#[2:0] DRAS#[2:0] LWRLL# LWRLL# ESS RISC MPEG DB[I5:0] DB[I5:0] MPEG LOE# LOE# DCAS# DCAS# RISC... - Page 5 3、The time clock circuit is composed by 27MHz, 24.576MHz crystal oscillator and their multiple frequency circuits. The time clock ACLK of WM8739 can be produced by 24.576MHz crystal oscillator’s half frequency. 27MHz crystal oscillator can provide ES6128 and time clock of ES7010. The following is part circuit figure of it: Figure 6、Time clock circuit From the above figure, you will see that the time clock circuit is mainly composed...
- Page 6 power supply work normally. You can confirm the troubleshooting took place on chip or on mainboard by exchanging the chip. For example, some chip cannot read disc, it may relevant to the coherency of chip besides the problem of disc. In the checking of mainboard, if it can not display picture after power on, you should check and measure:（1）all the groups of voltage between power board and mainboard, the first group voltage is GND +5V +12V GND –12V, the second group voltage is +5V GND...
- Page 7 communicated signal between ES7010 and 64M SDRAM.（2）Test the 8 channels of digital video signal between SAA7114 and ES7010. （3）Test the communicated signal between WM8739 and ES7010, the relevant resistance is RN16.（4）Test the output of ES7010 to LVT244B and the data buffer which composed with LVT374.
- Page 8 RC4558, so can confirm that RC4558 is invalid, exchange it. （3）One BSA-3800R player is found that there is no audio output from 5.1 CH, find it is still has no sound before amplified by RC4558, so exchange PCM1606 DAC.
- Page 9 ES7010 and WM8739, so may WM8739 is invalid, exchange it and the trouble is removed. （13）One BSA-3800R player is hang-up when it is recording with external signal. The signals of above are normal, but there is no signal output after passing data buffer that is composed by LVT244B and LVTH374.
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