Pioneer G-5 Product Update Manual page 84

[ Diagnosis of abnormalities other than shutdown and power-down ]
Symptom
No power (both red and green LEDs unlit)
No power (green LED not lit)
The power is (sometimes) interrupted.
The power is interrupted, and the red and
green warning indications appear on the
screen.
While the red LED remains lit, the green
LED begins flashing (200 ms).
Key input not effective
Remote control unit not effective
Abnormality in a one-eighth area of the
screen
Abnormal screen
(Data of every other dot are abnormal)
Defective Assy Possible Cause
Cable disconnection
Defective 114-pin FPC
Defective system cables
System cables not connected
No backup copy
Cable disconnection
Cable disconnection
KEY CONTROL Defective KEY SCAN IC
Cable disconnection
PANEL IR Defective infrared receiver
DIGITAL VIDEO Defective IC4
ADDRESS
Defective 114-pin FPC
Possible
Check Point
Defective Part
Check if the connection between the POWER SUPPLY and PANEL
CN4001
IF assemblies is properly made.
CN4004 - CN5001 ADY1081 Check if the FPC is broken or not securely inserted.
Check if the system cables are securely connected. (See "7.1.4
CN4002, CN4003
Operation when the Media Receiver is not connected.")
Check connection of the system cables. (See "7.1.4 Operation
when the Media Receiver is not connected.")
The backup copy process was not performed when the Digital Assy
was replaced. (See "7.1.7 Backup when the main unit is adjusted".)
Check if the FPCs are properly connected. Check if imparting
CN4801 - CN4851 ADD1225 vibration to the unit affects key inputs. Check if a pulse is output
when the key corresponding to Pin 2 of the CN4852 is pressed.
Check if the cables are disconnected or not securely connected.
CN4852 - CN4010 Check if a pulse is output when the key corresponding to Pin 8 of
the CN4010 is pressed.
Check if a pulse is output when the key corresponding to Pin 2 of
KEY CONTROL Assy IC4851
the CN4852 is pressed.
CN4901 - CN4010 Check if the cables are not connected or securely connected.
Check if a pulse is output when the key corresponding to Pin 3 of
PANEL IR U4901
the CN4010 is pressed.
Check if an abnormal area in the screen changes when the FPC
IC4 BLOCK IC5401 connected to the address corresponding to the abnormal area is
replaced with the one corresponding to the next address.
Check that an abnormal area in the screen does not change when
the FPC connected to the address corresponding to the abnormal
area is replaced with the one corresponding to the next address.
CN4004 - CN5001 ADY1081 Check if the FPC is broken or not securely inserted.
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Remarks