Advertisement
http://www.jdwxzlw.com/?fromuser=华盛维修
No display on VFD, and buttons do not work
No display on VFD, and
buttons do not work
Check
voltage on main board is
normal
Check-24V+12V, VCC
(+5v) voltage on the
power and front board
Check the front board
signals on R24, R25,
R26. (SCK,SDA,STB)
1. Check whether bad solder exists
on U2 and pins of VFD,
2.
Check
connected to K2, K3, K4, K5 and
K6 is broken.
Replace U2 or VFD
家电维修资料网，免费下载各种维修资料
Yes
every
supply
Yes
Yes
Yes
whether
the
circuit
Yes
4-1
No
Refer to Power supply board part
No
Fix the connection JP1 on front board
and CN1 on power board
No
Check the U3's pin 2,4, 7 arrive the
U3's pin 6,8,9 connect condition
No
Correct connection
Trouble Shooting Chart
Advertisement
