Pioneer CX-3250 Service Manual page 59

5
Check 2: Is VDD5 (VCC33, VCC12) power supply voltage OK?
V D D 5
IC1004
3.3 V output regulator
IC1005
DC/DC converter
1.2 V output
Fig 2.1: Power supply configuration
<Check> Check the voltage at the "VDD5_1, VCC33_1 and VCC12_1" test point while the power is on.
Use the "DGND1" test point at the reference.
NO. Check point
1 VDD5_1 - DGND1
2 VCC33_1 - DGND1
3 VCC12_1 - DGND1
Side A
Fig 2.2: VDD5, VCC33, VCC12 voltage check points
5
6
VCC33 (= 3.3 V)
VCC12 (= 1.2 V)
Specification value
Module No.
ALL 5.0 ± 0.4
ALL 3.3 ± 0.15
ALL 1.2 ± 0.12
VDD5_1
AVIC-X930BT/XNUC
6
7
IC1401 FLASH power supply (Data)
IC1402 FLASH power supply (Program)
IC1481 SDRAM power supply
IC1501 DV5U power supply
IC1501 DV5U power supply
Unit
V
V
V
VCC33_1
VCC12_1
DGND1
7
8
A
B
C
D
E
F
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