Pioneer PDP-503CMX Service Manual page 127

5
Types and function of the various protection circuits (P.D. circuits)
Assy Name OSD Display
Y-DRV
Y DRIVE Assy
Y-DDC
X-DDC
X DRIVE Assy
X-DRV
SW POWER SUPPLY
POWER
Module
ADR CONNECT Assy ADRES
RESONANCE Assy ADR-K
DIGITAL VIDEO Assy DC-DC
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-503MXE model.
5
6
Red "STANDBY/
Type of P.D.
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
PDP-503CMX
6
7
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 the 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)
7
8
Remarks
A
B
C
Note 1
D
E
F
127
8