User manual

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USER MANUAL |
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DIAGNOSTIC INFORMATION
The DPP-450 has several built-in diagnostic modes.
• Holding <LF> button while power on for ~ 0.5 sec (first sound
signal) – short self-test.
• Holding <LF> button while power on for ~ 2.5 sec (second sound
signal) – start dump mode. All input data are printed hexadecimal
and as text.
• Holding <LF> button while power on for more than 8.5 sec (fifth
4-tone sound signal) – enter firmware updating mode.
• Holding <ON/OFF> button while power on for ~ 4 sec (first sound
signal).
o If serial cable is connected (RS232 communication) –
temporary forcing 9600 bps serial speed.
o If no serial cable connected (Bluetooth® or USB
communication) – starting a hardware menu for fast
Bluetooth® pairing info reset.
• Holding <ON/OFF> button while power on for more than 6 sec –
enter hardware setup mode.
• Holding <ON/OFF> button while power off for more than ~ 1sec.
• Holding <ON/OFF> button while less than ~ 1sec, backlight is turn
on for short time.
• Holding <ON/OFF> button and press <LF> button – printing WIFI
info.