24
CDJ-3000
1
2
3
4
A
B
C
D
E
F
1
2
3
4
5.3 JLCD ASSY DIAGNOSIS METHOD
JLCD ASSY
PNLB
ASSY
Jog
LCD
MAIN ASSY
SOC
LVDS
Power circuit
Power circuit
Control signal
Control signal
Backlight
3.3 V
LVDS
The JLCD Assy is structured in such a way that it cannot be diagnosed when the product is in operation.
Because the JLCD Assy is located inside the Jog Assy, as the below figure.
The disassembly procedure to the diagnostic status is listed under the following conditions.
Case 1 : The procedure for repairing that
the JOG LCD does not work
Case 2 : The procedure for repairing that
the product cannot detect the Jog touch
+
The Jog Assy does not need the disassemble when the product cannot detect the Jog rotation.
In order to perform a diagnosis in this case, you need to disassemble the Jog to the following states.
Front side
Overall
Diagnostic state
Back side
g
Problem about the JOG
"
Remove the Control panel Section.
(Refer to "7. DISASSEMBLY".)
g
Diagnostic procedure and contents
Case 1 : The procedure for repairing that
the JOG LCD does not work
1
Before disassembling the Jog Assy, confirm that the MAIN Assy is not defective.
+
MAIN Assy defects can be diagnosed without having to disassemble the Jog Assy.
!
Is the back light power (BL1_C) normal?
!
Is the control power (V+3R3D) normal?
!
Is the control signal from MAIN CPU (IC1801) to LVDS Tx (IC4401) normal?
!
Is the output signal from LVDS Tx (IC4401) normal?
These signals are supplied via PNLB Assy, so you should also confirm the output from PNLB Assy first.
If you don't find any problems after confirming so far, disassemble the Jog Assy.