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1
Check 2 : VDD5(VCC33,VCC12) power supply voltages OK?
VDD5
A
VDD5
B
<Check>
Verify the voltage of the sensing pin in the state where the power supply is on.
It checks on the basis of DGND.
Verification location
No.
1 VDD5_1 - DGND4
2 VCC33_1 - DGND1
3 VCC12 - DGND1
C
Side A
D
E
F
186
1
2
F.E. driver
PU peripheral
IC1003
VCC 3.3 V/1.2 V output
DC/DC converter
Module No.
ALL
ALL
ALL
DGND1
VCC33_1
VCC12
Fig.2.2 : VDD5,VCC33,VCC12 power supply voltage point
AVH-P7800DVD/UC
2
3
VCC33 (= 3.3 V )
VCC12 (= 1.2 V )
Fig.2.1 : Power supply
3
4
IC1402 FLASH power supply
IC1481 SDRAM power supply
IC1501 DVD-LSI power supply
IC1501
DVD-LSI power supply
Rated value
Unit
5.0
0.4
V
3.3
0.15
V
1.2
0.12
V
VDD5_1
DGND4
4
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