jay_miao1

<p>Based on the numbers from a working DP-30 I figured that 3.3v and 12v lines on my finder seem to be fine where the 6K ohms on 3.3v is right. However, pin 1 to 6 for signal control on my finder measured ~0 ohms (short) must be wrong or the culprit. Thank you Marc.</p>

<p>I tried everything it could take me to troubleshoot but without another working DP-30 and/or F5 body handy or the finder schematics hard to tell whether the 3.3V line behaves normal. And yes I did test it without finder attached it's working fine. Another observation is with or without finder attached when I turn on the power switch top LCD display is kind of delayed about couple secs to show values, not instance as most other cameras I have does, is it normal?</p>

<p>Recently acquired a nice F5 however the viewfinder DP-30 is malfunctioning. Browsed the net and found the electronic pinouts definition from 1 to 13 (L to R while holding the camera) as GND in #1, 12V #4 and 3.3V #5 while other 4 pins in left segment for controls. Here's the problem, both 12 and 3.3 volts on the camera body are fine (measured) but as soon as the finder is attached and metering all LCD back light in VF blacked out (never turned on) and battery/voltage drops in few dry shots and camera could hang at end.</p> <p>I measured each pin of VF using multimeter with respect to GND (1~7 mainly for meter and LCD light control at left while right segment for speedlight) that resistance/impedance btw 5 to 1 for 3.3V is about 6K ohms only (should be much higher compare to 12V in 6M after cap fully charged) and pin 6 to 1 for control is basically 0 ohms or *short* which made me to believe why no LCD back light engaged and batt drained out so quickly.</p> <p>I'd like to ask someone who owns a working F5 a big favor please that what the resistance btw pin 5 and 6 to 1 (GND) on the VF (not camera body) respectively which might help me to understand as if my DP-30 is the culprit. Thanks in advance!</p>

<p>Golden Gate Bridge San Francisco</p><div></div>