Samsung SDC-313ANA, Service Manual

Page: 43 / 82

5-3 DC Iris do not operate
DC Iris do not operate
Refer to Waveform-3
Does it use DC drive Lens?
Check the lens select "DC" on the
camera
Check the connector of DC lens
Is the waveform appeared at CN1 #1,3,4
(BACK PCB)
YES
Connect DC drive Lens to the camera
Change the DC Iris lens Plug-Jack
connection states.
NO
YES
YES
NO
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
Set the DC/VIDEO switch to "DC" select
DC on the SET UP MENU
NO
YES
YES
NO
Check the IRIS-PWM1 signal on CN2 #15
(MOTHER BOARD)
Check the pin5 of U300B
NO
Check the IRIS-ref signal on CN2 #9
(MOTHER BOARD)
Check the pin3 of U300A
YES
DC IRIS check end
Refer to Waveform-4,5
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