Dc Iris Doesn't Operate - Samsung SDC-415 Series Service Manual

5-3 DC Iris do not operate
DC Iris do not operate
Refer to Waveform-3
Does it use DC drive Lens?
YES
Check the lens select "DC" on the
camera
YES
Check the connector of DC lens
YES
Is the waveform appeared at CN1 #1,3,4
(BACK PCB)
YES
Check the IRIS-PWM1 signal on CN2 #15
(MOTHER BOARD)
YES
Check the IRIS-ref signal on CN2 #9
(MOTHER BOARD)
YES
DC IRIS check end
CHECK FLOW
1 ) L e n s s w i t c h c h e c k
2 ) C o n n e c t o r c h e c k
3 ) I r i s c o n t r o l s i g n a l C h e c k
NO
Connect DC drive Lens to the camera
Set the DC/VIDEO switch to "DC" select
NO
DC on the SET UP MENU
Change the DC Iris lens Plug-Jack
NO
connection states.
NO
Check the pin5 of U300B
NO
Check the pin3 of U300A
-43-
Refer to Waveform-4,5