Hitachi CMP5000WXJ Service Manual page 104

Kind and function of the various protection circuit (P.D. circuit)
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
Note 1: AC200V P.D. is not applicable to the CMP5000WXE model.
132
Red LED
Kind of P.D.
Number of
Circuit
Blinks
1 VCP OCP
VOFS OVP
VOFS UVP
2 VH OVP
VH UVP
IC5V UVP
VRN OVP
3
VRN UVP
VCP OCP
4
RESET 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
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 reset circuit 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 apply
PFC module overheat protection
VSUS arc resistance overheat protection
P.D. by disconnecting the connector
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)
Remarks
Note 1