HIKVISION DS7208HVI-SN Product/Maintenance Manual - Page 12
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- 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
- 6. Network Module
- 7. Power Supply Module
- 8. Ds80061 Mainboard Failure Analysis
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
1
8563T
2
UL4
3
4
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:
3.3V
DG1
DG2
8
7
6
5
X1
32768Hz
8563T
Diode
Battery
DG3
BATTERY
3.3V