Philips DC570/12 Service Manual page 6

SERVICE TEST PROGRAM
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How to read USB fireware version:
1) Insert any USB device at USB mode.
2) Press PLAY/PAUSE button on Front Panel for 7 seconds, the display will shows yy ---> mmdd---> uu.
yy refers to year.
mmdd refers to month & date.
uu refers to Software version number of USB.
How to upgrade USB fireware:
1) Insert the USB device which contains new version software at USB mode.
2) Press SOURCE button on Front Panel for 10 seconds, the display will shows ISP. Then OTI IC will be upgraded automatically within 15 seconds.
To start service test program
hold PRESET+ & VOLUME+
depressed while
plugging in the mains cord
Display shows the
ROM version *
V refers to Version.
"Vxxx"
xxx refers to Software version number of µProcessor.
(Counting up from 001 to 099)
DISPLAY
TEST
N
T
Button pressed?
Y
Display shows all LEDs on
N
VOL-
Button pressed?
Y
Set restored, Display shows
"CLr"
2-1