HIKVISION DS7208HVI-ST, DS7208HVI-SE Product/maintenance Manual

Product Maintenance Manual

（HIK/DS7208HVI-ST/SE）

Functional Characteristics：

 VGA video output resolution topped 1024 * 768；
 The first channel support 4 CIF real-time coding , the o thers channel

support CIF real-time coding；Support previe w 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 (ne tw or k scho o l) , SA DP (a utomatic search IP addre ss)

agreement.

1. DS7208HVI-ST/SE Equipment Physical Interface

2. DS7208HVI-ST/SE Equipment Internal Structure

3. DS80054 Mainboard Hardware Principle Diagram

4. DS80054 Mainboard Hardware Modules Diagram

5. DS80054 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 Mo du l e

5.8. Voice Talkback Module

5.9. Power Supply Module

6. DS80054 Mainboard Fa ilure 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/SE Equipment Physical Interface

Note: DS7208HVI-ST/SE equipment some no RS485 interface

2. DS7208HVI-ST/SE Equipment Internal Structure

SATA power interface

Front-panel

12V power interfac

SATA interface

Panel line interface

Panel line

USB line

USB interface

3. DS80054 Mainboard Hardware Principle Diagram

DSP

Network

（RTL8201）

TW2866

（US1）

FLASHDDR∏

SP491

SGM9111

UTP

Interface

USB

VGA

Interface

VOUT

Interface

SATA

interface

LVC07A＋6303

RS232

interface

RS485

interface

Audio in

Video in

Audio out

AOUTinterface

Diagram1.1 DS80054 Hardware P rinciple Diagram

Note：

 TW2866 (US1) support 1 r oad audio and 4 roa d video input, voice talkback Line In input

and AOUT output

 VGA signal output directly from KY2010 chip, the external circ uit by LVC07A + 6303

control VGA outpu t a m p lification

 VOUT signal directly from KY2010 chip output, th e external circu it c ontrol by SGM 911 1

VOUT signal amplifier output

 no alarm input/ou t of modules

4. DS80054 Mainboard Hardware Modules Diagram

Diagram 1.2 DS80054 Mainboard Hardware Modules Diagram

5. DS80054 Mainboard Hardware Module Introduction

5.1. Audio Vide o A/D Module

 Video A/D Module Main Control Chip：TW2866 Audio

1) TW2866（US1）P IN 6 control fi rst audio input （input matching re sistance
100 (RU9) and capacitance (CS18)）

2) TW2866（US1）PIN 13/1 7/21/25 control 1-4 road vedio input （BNC i nput
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））

3) TW2866（US2）PIN 13 /17/21/25 control 5-8 road vedio input （BNC i nput
matching 4 HK-5 production tube（ TVS1/3/5/7）； 4 75Ωresistance

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

（ RV1/3/5/7 ）； 4 100Ωresistance （ RU5/6/7/8 ）； 4 capacitance
（CS42/48/29/33））

 27 M (Y4) : TW2866 work clock, PIN 82 input 27 M
 Audio video A/D module component：

75Ω（RV1-8）

HK-5（TVS1-8）

5.2. VGA Output Module (Local Preview Image Output Mo dule)

 VGA main chip module： LVC07A, 6303; LVC 07A PI N 2 o utp ut si ngle(V S)

and 1 K resi stance (RL 50) conne ct 5V vol tage, PIN 4 output si gnal (HS) and
1 K (RL51) resistance co n nect 5V voltage

 BAV99: control VGA output amplification, if BAV99 (Q9) 3 feet low level

(voltage 0 V), it mea ns the sys tem to de tect V GA display ; If you me et VGA
display, system and output si gnal and syste m menu VGA; If be hind the VGA
display, the syste m 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:

27M（X4）

100Ω（RU1-4）

（

CS12/8/13/11）

100Ω（RU9）

TW2866（US1）

（

CS18）

100Ω（RU5-8）

（

CS42/48/29/33）

TW2866（US2）

① : PIN 10 output “R” signal ;
② : PIN 1 1 output “B” signal ;
③ : PIN 12 output “G” signal ;
④ : PIN 4 output “HS” signal ;
⑤ : PIN 2 output “VS” signal ;

VGA master chip : 74LV07 and 6303

Description:

74LV07

PIN4

PIN2

5V

5V

RL50
1K

Ω

RL51

1K

Ω

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 BA V99(Q 9) is high-leve l (nearly 3.3V), said syste m doesn’t detect
VGA monitor;

 VGA module components：

6303

74LV07

75Ω(RG6)
75Ω(RG5)
75Ω(RG4)

BAV99(Q3)

BAV99(Q8)

BAV99(Q7)

②

①

③

④

⑤



5.3 .VOUT Output Module (Local Preview Image Output Module)

 VOUT main control chip: SGM9111, PIN 3 pull-down 75Ωresistance

(RS188) groundi ng and in pu t CVBS -OUT signal, PIN 4 through the
75Ωresistanc e (RS117) output VOUT signal, working voltage through a
WCX(FBS48) for 5V power supply

 VOUT interface TVS protection tube: VOUT interface connect HK-5 (TVS9)
 VOUT signal output basic schemes:

LVC07A

BAV 99（Q3/7/8/9）

6303

75Ω（RG4/5/6）

1K（RL50/51）

33Ω（RG30/31）

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

75Ω（RS117）

WCX（FBS48）

75Ω（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 sig nal

amplification, rectificat ion

5.4.3 Crystal

Chip name Description

25M(Y3) RTL8201 clock chip

5.4.4 Signal amplification chip :

U2.8(UN3) : used to amply signal transmission (TX) / Receiv e ( RX ) ;

5.5. SATA Module

 SATA main control chip: KY2010
 BD9329(U2) power piece: PIN 2 enter 12 V, PIN3 output 5V for SATA power

source

 SATA module part:

U2.8

MS10232

RTL8201

25M（Y3）

WCX（FBN1）

5.6. RS485 Module

 RS485 main control chip: SP491EEN, PIN 9, 10 were TX +,TX-,the

difference voltage close to 5 V

 TVS: B03NC (BA5/6/7/ 8), HK-4 (D2/3 /4/ 5) pr otect the se ndi ng end (TX +,

TX-R +, R-)

 Thermistors (JK250) : JK250 (RPT1/2/3/4) protect the sending end (TX +,

TX-R +, R-)

 RS485 module part:

SATA interface

SATA
power
interface

B03NC（BA5/6/7/8）

SP491EEN

JK250（RPT1/2/3/4）

HK-4（D2/3/4/5）

BD9329（U2）

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 co nne cts to 3 .3 V vol ta ge, DG 2, DG3

Battery are co nnected at one end , when the mainbo ar d el ectricity, 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

8563T

32768HZ

Battery

Diode

5.8. Voice Talk back Module

 Voice talkback module main control chip: TW2866 (US1), PIN 2 through

3.9 K resistance (RS60) + 560Ωresistance (RP24) output Aout
 Voice talkback module pa rt:

(note: voice talkback Line In input and the first road audio input share)

5.9. Power Supply Module

 The power module component：

560Ω（RP24）

TW2866（US1）

3.9K（RS60）

 BD9328 (U1) : PIN 2 enter 12 V, PIN 3 output 5 V, mainly used for other

components provide normal work voltage

 BD9329 (U2) : PI N 2 enter 1 2 V,PIN 3 output 5 V , mainly fo r the SAT A hard

disk normal powe r BD9328 (U3) : PI N 2 enter 12 V,PIN 3 3.3 V, mainl y used
for other components provide normal working voltage, power of MP8904
turn 1.2 V output

 BD9328 (U4) : PIN 2 enter 12 V,PIN 1 output 1.8 V, mainly for the KY2010

system working voltage and DDR2 memory work voltage

 BD9328 (U5) : PI N 2 ente r 12 V,PI N 1 o utp ut 1.0 V , m ainly fo r t he K Y2010

system start working voltage

 MP8904 (UV3) :PI N 8 input 3.3 V,PIN 1 output 1.2 V, mainly for the TW2866

chip normal working voltage

BD9329（U2）

BD9328（U3）

BD9328（U1）

BD9328（U4）

BD9328（U5）

6. DS80054 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 (Q9) 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: ① BAV99 (Q9) 3 feet high le vel, only o utput signal VG A monitor, monitor
and output signal and system VOUT menu

② BAV99 (Q9) 3 feet low level, di splay and VGA output signal and system

menu, monitor only output VOUT signal

6.3 Fault Analysis

①. No VGA Output

Step 1: measure 1 K resist ance (RL50/5 1), or replace ment (1 K val ue 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 PI N 3 i np ut ( HS sig nal) voltage 3V also, and then

measure PIN 2 ou tp ut (V S signal) voltage about 5V, the PIN4 o ut pu t

(HS signal) voltage about 4.3V, otherwise LVC07A ruled out
Step 4: measuremen t cap aci ta nce CG1, CG2 impedance , or repl ace me t

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 re placement, and then monitor’s

signal lines connected to the probe, directl y lead CVBS -VOUT signal

from 75Ω resistance (RS188) end, or KY2010 ruled out

③. Image Problem

Phenomenon 1 : there is no video si g nal , fi r st e xcl u de HK -5 (TVS1-8) whether
short circuit, or replac e men t; Me as u rin g 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 fe w cha nnel image blac k sc re e n, f ir st r u le ou t the so ftw are
settings, o therwise int roduce video signal into TW28 66 chip video i nput end,PIN
13/ 17/21/25, to rule out the chip is normal , or repla ce me nt

Phenomenon 3: all black and white images or flower screen, to rule out 27 M
(Y4), then rule out software, or change TW2866

CG1，CG2

④. Voice Problems

Phenomenon 1: preview no voi ce , fi rs t w it hout software Se tti n g s, t he n
measuring 100 resistance (RU9) and capacitance (CS18) impedance, or
replacement, finally ruled out TW2866 (US1) (can directly introduce audio
signal into TW2866 chi p audio input PIN 6, to rule ou t the chip is normal o r not)

Phenomenon 2: voice talkback AOUT no output, measuring 3.9 K resistance
(RS60) + 560 Europe resistance (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 (RPT1/2/3/4)
Step 2: measurement TVS tube B 03 NC (BA 5/ 6/7/ 8 ), HK-4 (D2/3/4/5)
impedance, or replacement
Step 3: measurement SP491E EN 9 and 10 feet chip diffe rence vol tage (no rmal
close to 5 V), or replacement

⑥. Internet Links

 Network light and network data transmission light are flashing
Step 1: first mea surement RTL820 1 chip PIN 36 inp ut voltage 3.3V i s normal, or
to measure WCX (FBN1) impedance, or replaceme n t
 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 RTL82 01, an d the n rule d out MS1 02 32, U2.8

⑦.SATA Hard Dish Fault

Step one: first measurement BD9329(U2) PIN 3 power output voltage wheather 5V or short
circuit, or replacement

⑧. Clock Fault

Step one: the first to rule o ut the battery (normal volta ge 3.3 V), an d then ruled
out 8563 T, 32768 HZ, diodes

⑨.VGA Output Color Devation

Step 1: measuring 75Ω resistance (RG4/5/6), or replacement
Step 2: measurement BAV99 (Q3/ 7/8) PIN 3 impenda nce to GN D, 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 diff erence 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

number

Crystals Action (devices work clock )

1

27M（Y4）

TW2866 chips work clock (82 fee t input 27 M)

2

25M（Y3）

RTL8201 chips work cl ock

3

24M（Y1）

KY2010 system startup

clock, and integrated USB

module clock

The serial

number

Power chip function (devices working voltage)

1

BD9328（U1）

2 feet enter 12 V, 3 feet output 5 V, mainly used for
other components provide normal work voltage

BD9328（U5）

2 feet enter 12 V, foot 1 output 1.0 V, mainly for the
KY2010 system start working voltage

BD9328（U3）

2 feet enter 12 V, 3 feet 3.3 V, m ainly used f o r o the r

components provide normal working voltage, power
of MP8904 turn 1.2 V output

BD9328（U4）

2 feet enter 12 V, foot 1 output 1.8 V, mainly for the
KY2010 system worki n g vol ta ge an d DDR2 memory
work voltage

2

BD9329（U2）

2 feet enter 12 V, 3 feet output 5 V, mainly for the
SATA hard disk normal power

3 MP8904

（UV3）

feet 8 input 3.3 V, foot 1 output 1.2 V, mainly for the
TW2866 chip normal worki n g vol ta ge