Failure Code [Daf8Kb] Camera Power Supply Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06135-00

Failure code [DAF8KB] Camera Power Supply Short Circuit

Action
Failure code
level
L03 DAF8KB
q
Output power supply voltage (rating: 8 V) from machine monitor to camera is below 6.0 V or above
Detail of failure
10 V.
q
Action of Stops output of power supply voltage (Rating: 8 V) to camera.
q
machine moni- Even if cause of failure disappears, machine does not become normal until starting switch is turned
tor to OFF position.
Problem on
q
Camera image is not displayed on monitor screen.
machine
Related infor-
q
Method of reproducing failure code: Turn starting switch to ON position.
mation
Cause
Defective camera (internal short
1
circuit)
2 Defective machine monitor
Ground fault in wiring harness
3
(contact with ground circuit)
Hot short circuit in wiring harness
4
(Contact with 24 V circuit)
28
40-303
Failure code [DAF8KB] Camera Power Supply Short Circuit
Camera Power Supply Short Circuit
Failure
(Machine monitor system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect camera connector(s), and turn starting switch to ON position.
After above operation (disconnecting camera connector and performing failure
code reproducing procedure), if failure code disappears, camera has internal
defect.
1. Turn starting switch to OFF position.
2. Disconnect connector CM04.
3. Connect T-adapters to male side of connector CM04.
4. Turn starting switch to ON position.
Between CM04 (male) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector CM04 and camera connector (s).
3. Connect T-adapters to female side of connector CM04.
Between CM04 (female) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect camera connector(s).
3. Insert T-adapters into connector CM04.
4. Turn starting switch to ON position.
(Disconnect camera and check that camera is not defective in advance.)
Between CM04 (1) and (5)
303 Troubleshooting by failure code, Part 3
Voltage
Resistance Min. 1 Mz
Voltage
PC200, 200LC, 220, 220LC-8M0
6 to 10 V
Max. 10 V