Supplementary Information - Akai Professional DPS24 Service Manual

IV. SUPPLEMENTARY INFORMATION
1. Test Mode
While pressing the SHIFT button, press the CANCEL button to enter the DEBUG PAGE. To leave the DEBUG
page, press the MAIN SCREEN button. Return to the DEBUG PAGE from any TEST MODE by pressing the
CANCEL button while the SHIFT button is being pressed.
1-1. F1 (BUFFERS)
For confirmation of DISK BUFFERS LEVEL.
1-2. F3 (PANEL)
For confirmation of FADER TOUCH SENSE operation.
F1/F2 (RED TRACK LEDS)
To check whether red LED operation is correct or not.
The RECORD/EDIT SELECT LED, SIGNAL CLIP LED will light up in red.
All other LEDs will light.
F3/F4 (GREEN TRACK LEDS)
To check whether green LED operation is correct or not.
The RECORD/EDIT SELECT LED, SIGNAL CLIP LED will light up in green.
NOTE: After LED CHECK, even when the DEBUG mode has been escaped from, all LED indicators will go
out and only renewed modes will light up in order.
1-3. F4 (AUDIO)
The input AUDIO signal will be output to dircet according to display indicator specification. The main
purpose of this function is for factory testing.
1-4. F2 (MIX DSP) F6 (PATCH)
Not operational at V1.0.
2. PANEL OPERATION TEST MODE
This mode is operated by the OPERATION CPU and is not affected by the CPU circuit of the CPU PCB. This test
mode will operate even if the CPU PCB is not operating properly. Turn the power on while pressing down the
REWIND, FAST FORWARD, STOP and PLAY buttons.
This mode can be used to confirm correct operation of the SWITCH, FADER VR, MONITOR VR, JOG, SHUTTLE
and ENCODER. However, A/B SW, LINE/MIC SW, TRIM, TB LEVEL, PHONE LEVEL are omitted.
NOTE: FADER operation directly after power has been input cannot be tested.
3. OTHER HIDDEN MODES
3-1 With the SHUTTLE knob turned fully to the right, turning the power on will immediately access the VERSION
UP mode via the USB.
3-2 With the SHUTTLE knob turned fully to the left, turning the power on will boot up the system without
running a hard disc check.
This mode is convenient when the system will not startup because of hard disc data.
3-3 With the SHUTTLE knob turned 1/4 to the left, turning the power on will check hard disc content and start up
the system in PROJECT initial settings. Normally the DPS24 starts up in the last PROJECT created. This
mode is convenient when there is a problem with the last PROJECT data and the system won't start up.
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SERVICE MANUAL