Pioneer AVH-P7950DVD/RC Service Manual page 43

5
Check 2: Is VDD5 (VCC33, VCC12) power supply voltage OK?
VDD5
F.E. driver control system
IC1007
VDD5
3.3 V output regulator
IC1008
DC/DC converter
1.2 V output
Fig 2.1: Power supply configuration
<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
Fig 2.2: VDD5, VCC33, VCC12 voltage check points
5
6
VCC33 (= 3.3 V )
VCC12 (= 1.2 V )
Specification value
Module No.
5.0 ± 0.4
ALL
3.3 ± 0.15
ALL
1.2 ± 0.12
ALL
AVH-P7950DVD/RC
6
7
IC1401 FLASH power supply (Data)
IC1402 FLASH power supply (Program)
IC1481 SDRAM power supply
IC1501 DVD-LSI power supply
IC1501 DVD-LSI power supply
Unit
V
V
V
VDD5_3
VCC33
DGND1
VCC12_1
7
8
A
B
C
D
E
F
43
8