Jlcd Assy Diagnosis Method - PIONEER DJ AlphaTheta CDJ-3000 Service Manual

1

5.3 JLCD ASSY DIAGNOSIS METHOD

g Problem about the JOG
A
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.
Front side
B
The disassembly procedure to the diagnostic status is listed under the following conditions.
Case 1 : The procedure for repairing that
Case 2 : The procedure for repairing that
+ The Jog Assy does not need the disassemble when the product cannot detect the Jog rotation.
C
Case 1 : The procedure for repairing that
In order to perform a diagnosis in this case, you need to disassemble the Jog to the following states.
Overall
D
g Diagnostic procedure and contents
" Remove the Control panel Section.
(Refer to "7. DISASSEMBLY".)
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?
E
! 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.
MAIN ASSY
Power circuit
Power circuit
SOC
LVDS
F
If you don't find any problems after confirming so far, disassemble the Jog Assy.
24
1
2
Back side
the JOG LCD does not work
the product cannot detect the Jog touch
PNLB JLCD ASSY
ASSY
Backlight
3.3 V
LVDS
Control signal Control signal
2
3
the JOG LCD does not work
Diagnostic state
Jog
LCD
CDJ-3000
3
4
4