Belson BSA-3800R Service Manual

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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:

Video

V i d e o output

128M SDRAM

128M SDRAM128M SDRAM

Data Buffer LVT244B

Data Buffer

数据缓冲器

LVT244B

Video 1

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

signal

Audio output

ES6128

EPROM

CPLD

ISP2064VE

16M FLASH

D V D + R / R W

recorder chip

I/O LVTH273

ES7010

Data

Video

数据

ou tp u

input

输出

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

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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

in pu

输

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.

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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

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

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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LA[21:0]

LCS#[3:0]

LD[15:0]

LWRHL#

LWRLL#

LOE#

HA[2:0]

HD[15:0]

HWRQ#

HWRQ# HRDQ#

HRDQ# HIRQ#

HIRQ# HRST#

HRST# HIORDY

HIORDY HWR#

HWR# HRD#

HRD#

HIOCS16#

TDMCLK

TDMCLK TDMDR

TDMDR TDMDX

TDMDX TDMFS

TDMFS

TDMTSC#

AUX[7:0]

AUX[7:0] I2C

I2C VFD

VFD IR

SDRAM

JACK

接口

E S S

ESS RISC

RISC

处理器

DMA

controler

控制器

ATAPI

JACK

接口

Audio

音频

serial

串行接口

Screen

显示

jack

接口

TDM

JACK

接口

GPIO

MPEG

decoder

解码器

System multi

绻统多路输出

output

选择器

DVD system

DVD

decoding

绻统幂解码

寄存器

Figure 4、ES6128 interior diagram

DRAM

JACK

接口

2Kx32 ROM

512x32 SRAM

Video dealer

视频处理器

Video output

视频输出

Screen display

幏幕显示

Video encoder

视频译码器

Time o’clock

时钟

DSCK_EN

DSCK_EN DSCK

DSCK DQM

DQM DCS#[1:0]

DCS#[1:0] DMA[11:0]

DMA[11:0] DWE#

DWE# DOE#

DOE# DRAS#[2:0]

DRAS#[2:0] DB[I5:0]

DB[I5:0] DCAS#

DCAS#

YUV[7:0]

YUV[7:0] PCLK2XSCN

PCLK2XSCN PCLKQSCN

PCLKQSCN VSYNC#

VSYNC# HSYNC#

HSYNC#

CDAC

CDAC YDAC

YDAC UDAC

UDAC VDAC

VDAC

RESET#

RESET# XIN

XIN XOUT

XOUT

Ⅲ. Whole unit circuits analysis

1、Main chip circuit

The main frequency of ES6128 is 121MHz, and it has a external 128Mbit

SDRAME, its working voltage is 3.3V or 2.0V. The working voltage of ES7010 is

3.3V or 2.5V. The voltage of workgroup that connecting between mainboard and

power supply board is 5V, 3.3V respectively. Its order is 5V GND GND GND 3.3V

3.3V DVDOFF. 3.3V、2.5V、2.0V can be transferred by REG3 (REG-3.3V)、

REG11( REG-2.5)、REG1(REG-ADJ) and then outputted at middle pin. The

mainboard including reset circuit, time clock circuit, I2C memorize circuit, FLASH

software controlling circuit.

2、Reset circuit

Reset circuit is composed by reset IC V6300, reset IC PIN5 to 5V power supply, PIN4 output reset signal, PIN2 to GND. After power on, PIN5 produce a signal with 4.5V level. From the above figure, you can see that reset IC U55 provides the reset signal for

ES6128, ES7010, 8M FLASH, LVTH273, ISP2064. ES6128、ES7010、8M FLASH、LVTH273、ISP2064. If the reset signal can not work normally, the other

composite chips can not work normally, so leading to no picture after power on.

Figure

5、Reset

circuit diagram

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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 by 27MHz, 24.576MHz crystal oscillator, so the stability of crystal oscillator count for much the reliability of system. In the case of no picture after power on, you should check 27MHz, 24.576MHz crystal oscillator besides IC reset signal. Check the output frequency of crystal frequency after passing the IC and check the frequency that reached to all composite chips.

4、I2C signal circuit controlled memory 24C01, X1226, video decoding composite SAA7114, TUNER in the whole system. I2C signal check 24C01, SAA7114, TUNER and initialize all these chips in the process of unit power on. 2C signal controlled the signal of 24C01, SAA7114, X1226, TUNER after unit worked. Following figure 7 is about the signal connecting process.

Figure 7、I2C signal connecting

(5) 16M FLASH software controls circuit, the circuit is mainly composed by FLASH and

its software. The 16M FLASH controls the work of unit and the software controlling

of system. 16M FLASH AM29LV1600B can be re-writable by disc.

Ⅳ Mainboard troubleshooting check flow

Mainboard troubleshooting should be in the case of all groups of output voltage of

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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 GND GND +3.3V +3.3V OFF. Two groups of voltage can provide to ES6128, its voltage is 3.3V and 2.0V respectively, they are transferred by REG3 and REG1 with 5V level. The voltage can be outputted on the middle pin of REG. The two groups of supply voltage provide to ES7010, and they are 3.3V and 2.5V respectively. 3.3V can be provided directly by power board, and 2.5V is transferred by REG11 with 5V level.

Other chips ‘s supply voltage are 3.3V、5V、+12V、-12V respectively. （2）Check the output of reset signal.（3）If the 27MHz, 24.576MHz crystal oscillator can work

normally, and if the frequency to every composite chip’s time clock is on the normal standard. Figure 8 is the sketch map of mainboard troubleshooting flow.

Power on

Test the connecting between ATAPI and ES6128, and resistance,

Test ISP2064 and peripheral circuit or exchange ISP2064

Check the data signal of SAA7114 and

Test the signal between

SAA7114 and ES6128

Check the resistance

between 7010 and SDRAM,

or exchange SDRAM

YES

8、Mainboard troubleshooting check schematic diagram

If it has boot picture

YES

Can load the disc

YES

Can enter

the monitor

Can recorder

disc

Test the signal

between ES7010 and two SDRAM

YES

Test all voltage

(including REG1 REG2 REG11 output)

YES

Test the crystal oscillator and the frequency

YES

If frequency of U15 ES6128 PIN102 is

YES

Test the boot signal of U28 16M FLASH

YES

If U16 SDRAM has data signal

Resolder or ex change WM8739 or perpheral

Test the signal

between WM8739 and ES7010 (relevant resistance is RN16

Test if it is shorted,

exchange REG1 REG2

REG11 and adjust

resistance

Check the reset signal or exchange rest IC

Test R66 R82 or resolder ES6128

Resolder 16M FLASH or exchange FLASH

Resolder SDRAM and relevant resistance or exchange SDRAM

Test the relevant circuit

Check the

signal between 7010 and 6028

Figu

（3）If the main frequency of ES6128 is 121MHz.（4）Test the communicated signal

between ES6128 and SDRAM, and test the communicated signal between ES6128

and 16M FLASH.(5) RN15 RN23 RN25 RN30。Test the resistances RN15 RN23

RN25 RN30 of ES7010.

Enter into the situation of monitor, if it takes abnormal picture, you should test the

communicated signal between SAA7114 and ES6128, and test the work of

SAA7114. If it hang up when it is recording, you should test the following:（1）the

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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. Test the 8 channels of digital video signals, the relevant

resistances are RN20, RN24.（5）Test the digital video data signal of data buffer

to ISP2064 and ES6128. The mainboard and output board have composite output, S-video, RCA video

output,. Audio output has 5.1 CH audio output, optical , coaxial digital audio output.

It includes 5.1 channel audio DA circuit, audio amplify circuit, optical and coaxial

output circuits, SCART audio/video output circuit. SCART SCART circuits is

composed with three SCART controlling signal lines and one audion controlling

circuits. It can switch different AV situations of TV with SCART port by voltage

level’s high and low. Three SCART lines produce high and low voltage level signal

by LVTH273 of mainboard, it can control the audion. Optical and coaxial circuit is

built by the digital audio signal which outputted by mainboard then amplified by

VHCU04, at last it will output at the coaxial jack. The video output circuit is mainly

about mainboard output all kinds of video signals, these signals can be outputted

on all kinds of video output jacks after matching the circuits. The mainboard

outputs digital signal and transferred to 6 channels audio by PCM1606 DAC

transfer circuits, and then the 6 channels ‘s audio would be output after amplified

by amplified circuits. This process can build 5.1 channel output circuit. The main

trouble displays that there is no sound from 5.1 channels, or no audio output from

one group of 5.1 channels, or there is no audio signal from optical and coaxial. If it

takes troubles, you should analyze the troubles from back to forward step by step.

If it has no audio output, you should check RC4558 amplifier and the process of

digital audio to simulate audio.

Ⅴ.Power supply board troubleshooting flow

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Power on

If it has +5V output

YES

If it has +3.3V output

Check DZ1(4V7 regulator), D1(31DQ04) and peripheral circuit

Check D2 D3 and peripheral circuit

、

If transformer has output

YES

If it has –12V output

YES

If it has +12V output

YES

If the other has +5V output

If it has +3.5V between

D+ and D-

YES

If it has –24V output

YES

The power supply work normally

Check DZ2 D5 RF1( especially RF1) and peripheral circuit

Check DZ3 DZ4 D6 and peripheral circuit

Check DZ5 D7 D8 and peripheral

circuit

Check DZ7 R23 R24 D10 and peripheral circuit

Check DZ6 D11 and peripheral circuit

Exchange transformer

Figure

9、Power

supply board troubleshooting schematic diagram

Ⅵ . Maintenance Example: （1）One BSA-3800R player with nothing displays on LCD screen, check the

power-supply part and find there is no –24V voltage output. Then find D11 is invalid, exchange it.

（2）One BSA-3800R player loading a disc with 5.1 CH, find there is no sound from surround left, and surround right. Then find the sound signal is normal before amplified by 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.

（4）One BSA-3800R player neither has sound from 5.1 CH, nor –12V voltage output, then check to find RF1 10Ω safety resistance is invalid, exchange it. （5）One BSA-3800R player switch to different video output, when it is connecting with

SCART TV. For example: after S-VIDEO system switch to Y /PB/PR system, TV can not switch automatically to AV input. Check and find there is one audion among four audions is invalid, exchange it.

（6）One BSA-3800R player cannot display picture after turning on. Check and find there is no +5V, 3.3V voltage output from power supply board, and find there is no

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voltage output from transformer, exchange transformer so the trouble is removed. （7）One BSA-3800R player cannot display picture after turning on. Check the voltage

of mainboard is normal, the outputs of REG1 REG2 REG11 are normal too. Test the frequency of crystal oscillator, it’s normal, then find the reset signal is abnormal, exchange the reset IC so the trouble is removed.

（8）One BSA-3800R player cannot display picture after turning on. Check voltage, reset signal and crystal oscillator circuit, all of them work normally. Then check the main frequency of main chip ES6128 PIN102 is incorrect, find the resistance of PLL is broken, re-solder the chip .

（9）One BSA-3800R player cannot display picture after turning on. Check voltage, reset signal, crystal oscillator circuit and main frequency of ES6128, all of them work normally. Find that there is no communicated signal between ES6128 and SDRAM, but there is communicated signal between ES6128 and 16M FLASH, re-solder SDRAM, but there is still no signal between them. Re-solder the resistances between ES6128 and SDRAM, so the trouble removed.

（10）One BSA-3800R cannot read, and after replacing mechanism the trouble still exists. Re-solder pins between ES6128 and APAPI port, re-solder ISP2064 and re-solder the resistances between ES6128 and APAPI port, the trouble still exists. May ISP 2064 is invalid, exchange it and the trouble removed.

（11）One BSA-3800R player cannot enter into the situation of connecting external signal, find there is one signal of 8 signal lines between the communication of SAA7114 and ES6128. Re-solder the resistances, the trouble is removed.

（12）One BSA-3800R player is hang-up when it is recording with external signal, check the communication between ES7010 and SAA7114, and check the communication between ES7010 and 64M SDRAM, all of them are work normally. Then find there is no signal between ES7010 and ISP2064, and neither signal between 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. Find there is a bad solder dot on the LVT244B leads to LVT244B cannot work, re-solder it and the trouble is removed.

（14）One BSA-3800R player has picture but sound when it connecting with TV, find there is audio signal exists before CD4052, but not exists after it. Check the voltage of chip, re-solder it ,the trouble still exists, so find CD4052 is invalid.

（15）One BSA-3800R player’s clock cannot work normally, exchange the U22 X1226 and 32.768KHZ crystal oscillator, the trouble still exists. Exchange 3.6V battery, the trouble still exists. Check diode between D4 BAT54 audion and battery, exchange BAT54, so the trouble is removed.