Filter
Top Products
76
Smaller boards
Keypad
function
1.chk U1 voltage source(5V)
2.chk U1 output signal (always 5Vdc in regular time,no pulse voltage)
Yes
Yes
No
No
No
Rear Front IR
function
FAN/BD
Fan control:
1.chk the voltage of QF1 (5,6,7,8)
2.chk the fan voltage U502(2,15),U503(8)
3.check Y501(32.768kHz)
No 5V
1.Check Q701 & thermal Breaker
LED dark
1.chk LED voltage from J1
2.chk the mounting direction of LEDs
No work
1.chk buttons contact to PCB
PFC BOARD