
4-6
No display on VFD, and buttons do not work
No
No
No
Yes
Yes
No display on VFD, and
buttons do not work
Check whether there is
correct contact between
XP1 and XP2
Correct connection
Fix power supply board top
a power supply for should
electric circuit
Check the value of the ninth line and the
seventh line are higher than 2.5V.
Replace U301 or VFD
Yes
Yes
check VCC(+5v) and
+12V voltage on the
power and front board
Check there are DATA
signals and CLOCK signals .
Trouble shooting chart
Содержание DVP5990K
Страница 32: ...Front Board Print layout Top side 6 10 6 10 ...
Страница 33: ...Front Board Pint layout Bottom side 6 11 6 11 ...
Страница 34: ...OK USB Board Print layout Top side 6 12 6 12 ...
Страница 35: ...OK USB Board Print layout Bottom side 6 13 6 13 ...
Страница 36: ...Power Board Electric Diagram Bottom side 6 14 6 14 ...
Страница 37: ...Main Board Print layout Top side 6 15 6 15 ...
Страница 38: ...Main Board Print layout Bottom side 6 16 6 16 ...
Страница 42: ...REVISION LIST Version 1 0 Initial release Version 1 1 Add in 98 8 1 ...