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Metz 45CL-4 not firing consistently... Hi, Have a problem with a Metz 45CL-4 flashgun. I may have damaged the circuit by rapid charging from an external NiMh pack whilst trying to form the main capacitor. Have done this previously, with this and other Metz 45s and it's always been OK. I normally get a full charge in about 2.5 seconds only now I have a problem firing the flash. Have reverted to testing with 6 good alkaline AA batteries (reading 9.06v on pack) but problem persists. Symptoms: - Looks like flash charges OK and holds charge, but won't discharge on command. Green 'ready' LED is on. Triggering by test button or sync lead makes red LED come on then fade down. Initial test button press results in one very rapid fade of red LED, subsequent test button trippings slow red LED to a fade in about 1.5 seconds. I can hear a faint electronic 'click' when using the test button but flash fails to fire most of time. Very occasionally the flash will fire so it could be a trigger circuit problem. If I press test button repeatedly I can get a flash once in about every 15-40 attempts to trigger, typically taking about 20-30 seconds! I haven't yet measured the output but subjectively it looks about correct for the head mode setting. I think main cap is OK because I can get an occasional flash, heard an initial whine on first charge and green 'ready' LED is on. No subsequent whine until new attempt again on following day, when some of charge may have dissipated or if I eventually trigger a full discharge. All LEDS on head work OK as head dial is switched between modes or power settings. Are you familiar with this problem? Is it fairly easy to fix? Is this a DIY fix (it looks quite complex inside? I know to be careful with/discharge main cap) or will it need professional repair? I opened casing, nothing looks or smells burnt out. Apart from not firing gun is in excellent, unmarked condition. Would appreciate any advice. Thanks. Ricky

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  • dmhphoto Sep 04, 2008

    Exactly the problem I have with the 45-CL1!
    I used NIMHs (various brands, from 1200 mAh to 1450 mAh) for about a year. never mixed brands in the battery holder (45-39). Worked great for a long time. Must have put a full set of batteries through it every day for a year! Now it whines just fine, ready light illuminates, ready light blinks out when triggered (by cord-test button) but flash fires only occassionally. It seems that a fresh charge or some fresh Alkaline cells help to make the flashes more frequent, but not for long.


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Hi Guys!
I have had the same problem on CT-1 s and CT-5s.
In both cases the flash cable (called PC synch cable) was to blame. If flash fires correctly with the test button on the handle, then cleaning the cable contacts with contact cleaner spray seems to be the best first step.

Posted on Apr 29, 2009

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