Benq PB6200 Manuale Utente
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Smaller boards
Keypad
function
1.chk U1 voltage source(5V)
2.chk U1 output signal (always 5V dc in regular tim e,no pulse voltage)
2.chk U1 output signal (always 5V dc in regular tim e,no pulse voltage)
Yes
Y es
No
No
No
Rear Front IR
function
FAN /B D
Fan control:
1.chk the voltage of Q F1 (5,6,7,8)
2.chk the fan voltage U502(2,15),U503(8)
3.check Y 501(32.768kHz)
N o 5V
1.C heck Q 701 & therm al B reaker
1.chk the voltage of Q F1 (5,6,7,8)
2.chk the fan voltage U502(2,15),U503(8)
3.check Y 501(32.768kHz)
N o 5V
1.C heck Q 701 & therm al B reaker
LED dark
1.chk LE D voltage from J1
2.chk the m ounting direction of LE Ds
No work
1.chk buttons contact to P CB
1.chk LE D voltage from J1
2.chk the m ounting direction of LE Ds
No work
1.chk buttons contact to P CB
PFC BOARD