34
CX-3311
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Check 2: Is VDD5 (VCC33, VCC12) power supply voltage OK?
VDD5
VCC33 (= 3.3V )
VCC12 (= 1.2V )
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.
Check the “DGND1” test point at the reference.
No.
Check point
Module No.
Specification value Unit
1
VDD5_1 - DGND1
ALL
5.0 ± 0.4
V
2
VCC33_1 - DGND1
ALL
3.3 ± 0.033
V
3
VCC12_1 - DGND1
ALL
1.2 ± 0.015
V
Side A
Fig 2.2: VDD5, VCC33, VCC12 voltage check points
IC1401 FLASH power supply (Data)
IC1402 FLASH power supply (Program)
IC1480 SDRAM power supply
IC1501 DV5 power supply
IC1501 DV5 power supply
IC1004
3.3 V output regulator
IC1953
1.2 V output regulator
DGND1
VCC12_1
VCC33_1
VDD5_1