Service Mode; Overview Of Service Mode; Check Mode Operation - Pioneer CDJ-400 Service Manual

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6. SERVICE MODE

6.1 OVERVIEW OF SERVICE MODE

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Two microcomputers are provided for this unit: One is for the Display section, and it controls key input, displays on the FL
display, and lighting of LEDs. The other is for the Player section, and it controls the drive of the player. Test modes are provided
for each microcomputer:
1 Display Check mode for the Display section
Mode for confirmation of key input and display functions
2 Mode for checking load on the JOG dial and Adjustment
Mode for measuring load on the JOG dial when turned
3 Version Check mode
Mode for checking the software version of each microcomputer
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4 Updating mode
Mode for updating software of the microcomputer for the Player section (main microcomputer)
5 List of Error codes/Detail Display mode
Up to 16 error logs can be checked.
6 Operation Check mode for the Player section
This mode for operation check of the mechanism and servomechanism of the Player section consists of Player
Operation mode and Test Operation mode.
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6.2 CHECK MODE OPERATION

6.2.1 Display Check mode for the Display section
In this mode, you can light up some LEDs and part of the Display section to check if the input of each key/variable control is
correctly reflected on the display. An LED or part of the display is lit while the corresponding key is held pressed.
How to enter Display Check mode
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POWER OFF
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How to exit Display Check mode
F
POWER OFF
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POWER ON
CDJ-400
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FL Display
S ERV I CE MODE
If the TEMPO slider is located
anywhere other than the plus
(bottom) or positive (lowest)
maximum-value positions, the unit
enters Display Check mode for the
Display section.
Display Check mode
for the Display section
In this mode, while a key is held pressed,
the corresponding FL display and LED are lit.
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