Failure Code [Daf8Kb] Short Circuit In Camera Power Supply - Komatsu PC130-8 Shop Manual

SEN04121-02

Failure code [DAF8KB] Short circuit in camera power supply

User code Failure code
— DAF8KB
Contents of • Output power supply voltage (Rating: 8 V) from machine monitor to camera is below 6.0 V or above
trouble 10 V.
Action of • Turns output power supply voltage (Rating: 8 V) to camera OFF.
machine monitor • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Camera image is not displayed on monitor screen.
machine
Related
• Method of reproducing failure code: Turn starting switch ON.
information
Defective camera (Internal
1
short circuit)
2 Defective machine monitor
Possible causes
and standard
value in normal
Ground fault in wiring har-
state
3 ness (Contact with GND cir-
cuit)
Hot short (Contact with 24V
4
circuit) in wiring harness
6
Short circuit in camera power supply
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
1. Turn starting switch to OFF position.
2. Disconnect camera connector and turn starting switch to ON
Disconnect camera and perform failure reproduction operation. If
failure code disappears at this time, camera is defective.
1. Turn starting switch to OFF position.
2. Disconnect connector CM05, and connect T-adapter to male
3. Turn starting switch to ON position.
Between CM05 (male) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect camera connector.
3. Disconnect connector CM05 and connect T-adapter to female
Between CM05 (female) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect camera connector.
3. Connect T-adapter to connector CM05.
4. Turn starting switch to ON position.
Between CM05 (1) and (6)
Between CM05 (1) and (7)
position.
side.
side.
(Disconnect camera and check that it is not defective in
advance.)
40 Troubleshooting
1
Voltage 6 to 10 V
Resis-
Min. 1 MΩ
tance
Voltage Max. 10 V
Voltage Max. 10 V
PC130-8