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）
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