Pioneer AVIC-F90BT/XS/UC Service Manual page 43

5
QQ
3 7 63 1515 0
Check 2: Is VDD5 (VCC33, VCC12) power supply voltage OK?
VDD5
VDD5
<Check> Check the voltage at the "VDD5_3, VCC33_3 and VCC12_1" test point while the power is on.
Use the "DGND1" test point at the reference.
NO. Check point
1 VDD5_3 - DGND1
2 VCC33_3 - DGND1
3 VCC12_1 - DGND1
Side A
TE
L 13942296513
Fig 2.2: VDD5, VCC33, VCC12 voltage check points
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F.E. driver control system
IC1007
3.3 V output regulator
IC1008
DC/DC converter
1.2 V output
Fig 2.1: Power supply configuration
Module No.
ALL
ALL
ALL
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i
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7
2 9
8
IC1401 FLASH power supply (Data)
IC1402 FLASH power supply (Program)
IC1481 SDRAM power supply
VCC33 (= 3.3 V )
IC1501 DVD-LSI power supply
IC1501 DVD-LSI power supply
VCC12 (= 1.2 V )
Specification value
Unit
5.0 ± 0.4 V
3.3 ± 0.15 V
1.2 ± 0.12 V
Q Q
3 6 7 1 3 1 5
VDD5_3
DGND1
co
.
AVIC-F90BT/XS/UC
7
9 4 2 8
0 5 8 2 9 9 4 2 8
VCC33
VCC12_1
m
8
9 9
A
B
C
9 9
D
E
F
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