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1
Types and functions of the various protection circuits (P.D. circuits)
Red "STAND-
Assy Name
A
Y DRIVE Assy
X DRIVE Assy
B
SW POWER SUPPLY
Module
C
ADR CONNECT Assy
RESONANCE Assy
D
DIGITAL VIDEO Assy
Reference
OVP : Over Voltage Protect
UVP : Under Voltage Protect
OCP : Over Current Protect
PD
: Power Down
Note 1: The AC200V P.D. circuit is not mounted in the PDP-503PE and PDP-503PU models.
E
F
82
1
2
Type of P.D.
BY/ON" LED
Circuits
Number of
Blinks
1
VCP OCP
VOFS OVP
VOFS UVP
2
VH OVP
VH UVP
IC5V UVP
VRN OVP
3
VRN UVP
4
VCP OCP
VSUS OVP
VSUS UVP
VADR OVP
VADR UVP
15V OVP
15V UVP
12V UVP
6.5V OVP
5
6.5V UVP
13.5V UVP
-9V UVP
+B OVP
+B OCP
AC200V P.D.
6
ADR.PD
7
ADR.K.PD
5.0V OVP
5.0V UVP
3.3V OVP
8
3.3V UVP
2.5V OVP
2.5V UVP
2
3
Function
P.D. by VCP overcurrent
P.D. by VOFS overvoltage
P.D. by VOFS undervoltage (= overcurrent)
P.D. by VH overvoltage
P.D. by VH undervoltage (= overcurrent)
P.D. by IC5V undervoltage (= overcurrent)
P.D. by VRN overvoltage
P.D. by VRN undervoltage (= overcurrent)
P.D. by VCP overcurrent
P.D. by VSUS overvoltage
P.D. by VSUS undervoltage (= overcurrent)
P.D. by VADR overvoltage
P.D. by VADR undervoltage (= overcurrent)
P.D. by 15V overvoltage
P.D. by 15V undervoltage (= overcurrent)
P.D. by 12V undervoltage (= overcurrent)
P.D. by 6.5V overvoltage
P.D. by 6.5V undervoltage (= overcurrent)
P.D. by 13.5V undervoltage (= overcurrent)
P.D. by -9V undervoltage (= overcurrent)
P.D. by +B overvoltage
P.D. by +B overcurrent
P.D. by AC200V applied
PFC module overheat protection
VSUS arc resistance overheat protection
P.D. by disconnection of connectors
P.D. by ICP open and TCP defective
P.D. by 5V overvoltage
P.D. by 5V undervoltage (= overcurrent)
P.D. by 3.3V overvoltage
P.D. by 3.3V undervoltage (= overcurrent)
P.D. by 2.5V overvoltage
P.D. by 2.5V undervoltage (= overcurrent)
PDP-433PU
3
4
Remarks
Note 1
4
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