HIK VISION DS7208HVI-ST User manual

Product Maintenance Manual
（HIK/DS7208HVI-ST/SN）
Functional Characteristics：
VGA video output resolution topped 1024 * 768;
Partial digital zoom by using mouse when in HIKVISION PTZ control mode
The first channel support 4CIF/2CIF/CIF/QCIF real-time coding, the others
channel support CIF/QCIF real-time coding;
Support preview images and playback image of electronic amplification；
VGA, VIDEO OUT can be simultaneously screen preview, of which the main
output can output menu operation;
Support four channel synchronous playback;
Support one SATA interface;
Support NTP (network school), SADP (automatic search IP address)
agreement.

1. DS7208HVI-ST/SN Equipment Physical Interface
2. DS7208HVI-ST/SN Equipment Internal Structure
3. DS80061 Mainboard Hardware Principle Diagram
4. DS80061 Mainboard Hardware Modules Diagram
5. DS80061 Mainboard Hardware Module Introduction
5.1. Audio Video A/D Module
5.2. VGA Output Module (Local Preview Image Output Module)
5.3 VOUT Output Module (Local Preview Image Output Module)
5.4 Network Module
5.5 SATA Module
5.6. RS485 Module
5.7. Clock Module
5.8. Voice Talkback Module
5.9. Power Supply Module
6. DS80061 Mainboard Failure Analysis
6.1. First Meet VGA Display
6.2. First Meet VOUT Monitor
6.3 Fault Analysis
①. No VGA Output
②. No VOUT Output
③. Image Problem
④. Voice Problems
⑤.RS485 Failure
⑥. Internet Links
⑦.SATA Hard Dish Fault
⑧. Clock Fault
⑨.VGA Output Color Devation
⑩.USB Fault
Schedule: 1 Crystal Effect
Schedule:2 Voltage Effect

1. DS7208HVI-ST/SN Equipment Physical Interface
Note: Note: The back panel is similar to7208HVI-ST/SN(7216HVI-ST/SN)
2. DS7208HVI-ST/SN Equipment Internal Structure
Note: the front panel no menu operation function
SATA power interface
Front-panel
12V power interfac
SATA interface
Panel line interface
Panel line
USB line
USB interface

3. DS80061 Mainboard Hardware Principle Diagram
DSP
Network
interface
（RTL8201）
TW2866
（US1）
FLASH
DDR∏
6LB18
4
SGM9111
UTP
USB
VGA
VOUT
SATA
LVC07A＋6303
RS232
RS485
Audio in
Video in
Audio out
AOUT
Diagram1.1 DS80061 Hardware Principle Diagram
Note：
TW2866 (US1) support 1 road audio and 4 road video input, voice talkback Line In input
and AOUT output
VGA signal output directly from KY2010 chip, the external circuit by LVC07A + 6303
control VGA output amplification
VOUT signal directly from KY2010 chip output, the external circuit control by SGM9111
VOUT signal amplifier output
no alarm input/out of modules

4. DS80061 Mainboard Hardware Modules Diagram
Diagram 1.2 DS80061 Mainboard Hardware Modules Diagram
VGAmodule
RS485module
USB interface
Network module
VOUT module
SATA
power
module
A/D module
Power module
SATA interface
Clock module
RS232 interface
Network module
Front-panel interface

5. DS80061 Mainboard Hardware Module Introduction
5.1. Audio Video A/D Module
Video A/D Module Main Control Chip：TW2866 Audio
TW2866（US1）PIN 6 control first audio input（input matching resistance 100
(RU9) and capacitance (CS18)）
TW2866（US1）PIN 13/17/21/25 control 1-4 road vedio input（BNC input
matching 4 HK-5 production tube（TVS2/4/6/8）；4 75Ωresistance（RV2/4/6/8）；
4 100Ωresistance（RU1/2/3/4）； 4 capacitance（CS12/8/13/11））
TW2866（US2）PIN 13/17/21/25 control 5-8 road vedio input（BNC input
matching 4 HK-5 production tube（TVS1/3/5/7）；4 75Ωresistance（RV1/3/5/7）；
4 100Ωresistance（RU5/6/7/8）； 4 capacitance（CS42/48/29/33））
27 M (Y4/Y5) : TW2866 work clock, PIN 82 input 27 M
Audio video A/D module component：
100
Ω（
RU1-4
）
（
CS12/8/13/11
）
100
Ω（
RU9
）
TW2866
（
US1
）
75
Ω（
RV1-8
）
HK-5
（
TVS1-8
）
TW2866
（
US2
）
（
CS18
）
27M(Y4/5)
100
Ω（
5-8
）
电容 （
CS42/48/29/33
）

5.2. VGA Output Module (Local Preview Image Output Module)
VGA main chip module：LVC07A, 6303; LVC07A PIN 2 output single(VS)
and 1 K resistance (RL50) connect 5V voltage, PIN 4 output signal (HS) and
1 K (RL51) resistance connect 5V voltage
BAV99: control VGA output amplification, if BAV99 (Q9) 3 feet low level
(voltage 0 V), it means the system to detect VGA display; If you meet VGA
display, system and output signal and system menu VGA; If behind the VGA
display, the system only output VGA signal; If the high level (close to 3.3 V),
it means the system does not detect the display
VGA signal output basic schemes:
①: PIN 10 output “R” signal ;
②: PIN 11 output “B” signal ;
③: PIN 12 output “G” signal ;
④: PIN 4 output “HS” signal ;
⑤: PIN 2 output “VS” signal ;
VGAmaster chip : 74LV07 and 6303
Description:
6303
74LV07
75Ω(RG6)
75Ω(RG5)
75Ω(RG4)
BAV99(Q3)
BAV99(Q8)
BAV99(Q7)
②
①
③
④
⑤

74LV07
PIN4
PIN2
5V
5V
RL50
1KΩ
RL51
1KΩ
VS(Interlacing signal)
HS(Line signal)
BAV99 :
If the PIN 3 of BAV99(Q9) is Low-level ( 0V ), Said system detects VGA
monitor;
If the PIN 3 of BAV99(Q9) is high-level (nearly 3.3V),said system doesn’t detect
VGA monitor;
VGA module components：
5.3. VOUT Output Module (Local Preview Image Output Module)
VOUT main control chip: SGM9111, PIN 3 pull-down 75Ωresistance
(RS188) grounding and input CVBS-OUT signal, PIN 4 through the
75Ωresistance (RS117) output VOUT signal, working voltage through a
LVC07A
BAV99
（
Q3/7/8/9/10/11
）
6303
75
Ω（
RG4/5/6
）
1K
（
RL50
）
33
Ω（
RG27/28
）
1K
（
RL51
）

WCX(FBS48) for 5V power supply
VOUT interface TVS protection tube: VOUT interface connect HK-5 (TVS9)
VOUT signal output basic schemes:
SGM9111
CVBS-VOUT
Pin3 input
75Ω
（RS188）
Pin4 output
75Ω（RS117）
VOUT
FBS48
5V
DSP
Pin5
VOUT Module components：
5.4. Network Module
Network module components：
SGM9111
75
Ω（
RS117
）
WCX
（
FBS48
）
75
Ω（
RS188
）
HK-5
（
TVS9
）

5.4.1 LAN master chip :
Chip name pin Description voltage
RTL8201 36
Operation voltage
input “pin 36” via
“FBN1”
V≈3.3V
5.4.2 Transformer
Chip name Description
MS10232NL Network transmission signal
amplification, rectification
5.4.3 Crystal
Chip name Description
25M(Y3) RTL8201 clock chip
5.4.4 Signal amplification chip :
BV03C（TVS32/17）: used to amply signal transmission (TX) / Receive (RX) ;
5.5.SATA Module
SATA main control chip: KY2010
BD9329 (U1) power piece: PIN 2 enter 12 V, PIN3 output 5V for SATA power
source
SATA module part:
BV03C
（
TVS32/17
）
MS10232
RTL8201
25M
（
Y3
）
WCX
（
FBN1
）

5.6. RS485 Module
RS485 main control chip:6LB184, PIN 6, 7 were TX +,TX-,the difference
voltage close to 5 V
TVS（B03NC）：B03NC（BA2、BA7）protect the sending end (TX +, TX-R +,
R-)
Thermistors (JK250) : JK250 (RPT1/2) protect the sending end (TX +, TX-R
+, R-)
RS485 module part:
BD9329
（
U1
）
SATA interface
SATA
power
interface
B03NC
（
BA2
、
BA7
）
6LB184
JK250
（
RPT1/2
）

5.7. Clock Module
Clock control chip: 8563 T
32768 HZ: 8563 T reset the clock
Battery: External Battery, normal voltage 3.3 V
Diodes (DG1, DG2, DG3) : DG1 connects to 3.3 V voltage, DG2, DG3
Battery are connected at one end, when the mainboard electricity, DG2,
DG3 globe, DG1 conduction, Battery don't power supply; When the
mainboard power cuts, in turn, the Battery power supply, DG2, DG3
conduction, DG1 deadline
The clock module component
8563T
UL4
1
2
3
4
8
7
6
5
DG1
BATTERY
3.3V
DG2 DG3
3.3V
X1
32768Hz
5.8. Voice Talkback Module
Voice talkback module main control chip: TW2866 (US1), PIN 2 through 3.9
K resistance (RS60) + 390Ωresistance (RP24) output Aout
Voice talkback module part:
8563T
32768HZ
Battery
Diode


(note: voice talkback Line In input and the first road audio input share)
5.9. Power Supply Module
The power module component：
BD9329 (U1) : 2 feet enter 12 V, 3 feet output 5 V, mainly for the SATA hard disk normal
power
BD9328 (U3) : 2 feet enter 12 V, 3 feet output 3.3 V, mainly for the power of BD00IC0WE
turn 1.8 V output, as well as the other components provide normal work voltage
BD9328 (U5) : 2 feet enter 12 V, 3 feet 1 V, mainly for the KY2010 system starts kernel
working voltage
BD00IC0WE (U6) : 8 feet input 3.3 V, foot 1 output 1.8 V, mainly for the KY2010 system
working voltage and DDR2 memory work voltage
BD9329
（
U1
）
BD00IC0WE
BD9328
（
U3
）
BD9328
（
U5
）
390
Ω（
RP24
）
TW2866
（
US1
）
3.9K
（
RS60
）

6. DS80061 Mainboard Failure Analysis
VGA and VOUT and output image, but not at the same time output system
menu, the system default first detection VGA output, then detection VOUT
output
6.1. First Meet VGA Display
Boot to meet VGA monitor (or also meet VGA display and VOUT monitor),
BAV99 (Q6) PIN 3 low level effective, display output VGA signal and system
menu, monitor only VOUT signal
6.2. First Meet VOUT Monitor
Boot first meet VOUT monitors, BAV99 (Q9) 3 feet is high level, the high level
signal feedback to the CPU, monitor output VOUT signal and system menu,
display show only the VGA signal
Note: ①BAV99 (Q9) 3 feet high level, only output signal VGA monitor, monitor
and output signal and system VOUT menu
②BAV99 (Q9) 3 feet low level, display and VGA output signal and system
menu, monitor only output VOUT signal
6.3 Fault Analysis
①. No VGAOutput
Step 1: measure 1 K resistance (RL50/51), or replacement (1 K value too large,
LVC07A chip PIN 2 VS signal output, PIN4 HS signal output voltage
value will be lower, then cause no VGA output)
Step 2: measurement 33Ωresistance (RG30/31), or replacement
Step 3: using a multimeter to measure LVC07A PIN 1 input (VS signal) voltage
about 3.3V and PIN 3 input (HS signal) voltage 3V also, and then
measure PIN 2 output (VS signal) voltage about 5V, the PIN4 output
(HS signal) voltage about 4.3V, otherwise LVC07A ruled out

②. No VOUT Output
Step 1: measurement HK-5 (TVS9) whether short circuit, or replacement
Step 2: measuring 75Ωresistance (RS117) impedence, or replacement
Step 3: monitor’s signal lines connected to the probe, directly from SGM9111
(US7) chip PIN 4 draw out the VOUT signal, or replacement
Step 4: measuring 75Ω resistance (RS188), or replacement, and then monitor’s
signal lines connected to the probe, directly lead CVBS -VOUT signal
from 75Ωresistance (RS188) end, or KY2010 ruled out
③. Image Problem
Phenomenon 1: there is no video signal, first exclude HK-5 (TVS1-8) whether
short circuit, or replacement; Measuring 75Ω(RV1-8) resistance, or
replacement, and then ruled out 100Ωresistance (RU1-8); Finally ruled out
TW2866 (can directly introduce video signal into TW2866 chip video input
end,PIN13/17/21/25, to rule out the chip is normal or not)
Phenomenon 2: a few channel image black screen, first rule out the software
settings, otherwise introduce video signal into TW2866 chip video input end,PIN
13/ 17/21/25, to rule out the chip is normal, or replacement
Phenomenon 3: all black and white images or flower screen, to rule out 27 M
(Y4/Y5), then rule out software, or change TW2866
④. Voice Problems
Phenomenon 1: preview no voice, first without software Settings, then
measuring 100 resistance (RS46) and capacitance (CS18) impedance, or
replacement, finally ruled out TW2866 (US1) (can directly introduce audio
signal into TW2866 chip audio input PIN 6, to rule out the chip is normal or not)
Phenomenon 2: voice talkback AOUT no output, measuring 3.9 K resistance
(RS60) + 390Ωresistance (RP24) resistance, or replacement, finally ruled out
TW2866 (US1) (directly lead AOUT signal from the TW2866 chip PIN2, to
exclude the chip is normal or not)

⑤.RS485 Failure
Step 1: the first to exclude thermistors JK250 (RPT1/2)
Step 2: measurement TVS tube B03NC (BA2/7) impedance, or replacement
Step 3: measurement 6L184 6and 7 feet chip difference voltage (normal close
to 5 V), or replacement
⑥. Internet Links
Network light and network data transmission light are flashing
Step 1: first measurement RTL8201 chip PIN 36 input voltage 3.3V is normal, or
to measure WCX (FBN1) impedance, or replacement
Both network light and network data transmission light not bright
Step one: first measurement 25 M (Y3) crystal, or replacement
Step two: replace RTL8201
Both network light and network data transmission light are nomal
Step one: first replace RTL8201, and then ruled out MS10232, BV03C
（TVS32/17）
⑦.SATAHard Dish Fault
Step one: first measurement BD9329 (U1) PIN 3 power output voltage wheather 5V or short
circuit, or replacement
⑧. Clock Fault
Step one: the first to rule out the battery (normal voltage 3.3 V), and then ruled
out 8563 T, 32768 HZ, diodes
⑨.VGAOutput Color Devation
Step 1: measuring 75Ωresistance (RG4/5/6), or replacement
Step 2: measurement BAV99 (Q3/7/8) PIN 3 impendance to GND, or
replacement
Step 3: rule out 6303 chip

⑩.USB Fault
Step one: measurement SESR05 (QA1 or QA2) 2, 3 feet voltage difference
value (normal voltage difference about 3.05 V), as well as the impedance to the
GND, or replacement
Note: SESR05 (QA1 or QA2),front and after USB interface is independent of
each other
SESR05
（
QA2
）
SESR05
（
QA1
）

Schedule: 1 Crystal Effect
Schedule:2 Voltage Effect
Serial
numberCrystals Action (devices work clock)
1 27M（Y4）TW2866 chips work clock (82 feet input 27 M)
2 25M（Y3）RTL8201 chips work clock
3 24M（Y1）
KY2010 system startup clock, and integrated USB
module clock
The serial
number Power chip function (devices working voltage)
1
BD9329 (U1) 2 feet enter 12 V, 3 feet output 5 V, mainly for the SATA hard
disk normal power
2
BD9328 (U3) 2 feet enter 12 V, 3 feet output 3.3 V, mainly for the power of
BD00IC0WE turn 1.8 V output, as well as the other components
provide normal work voltage
BD9328 (U5) 2 feet enter 12 V, 3 feet 1 V, mainly for the KY2010 system
starts kernel working voltage
3 BD00IC0WE
(U6) 8 feet input 3.3 V, foot 1 output 1.8 V, mainly for the KY2010 system working voltage and DDR2 memory work voltage