Nikon NIKONOS Speedlight SB-103 Instruction Manual

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PREPARATION-confinued ______ _Examining and lubricating the O·rings:1. To remove the O-rings, except the one in the synchrosocket cover, grasp the ring between your thumb andforefinger. Pinch your fingers together as you slidethem in the direction of the arrow to create slack inthe O-ring. Then grasp the slack portion with yourother hand and pull the ring off (see Fig. 1).To remove the O-ring in the synchro socket cover,use the edge of a credit card or dive card or somethin , blunt, instrument. Never use a knife or othersharp·edged object. Push up on the center of thecover with a fingertip (or pOinted object), insert thecard under the ring, and pull it up to lift the O-ring out(see Fig . 2). Do not scratch the O-ring in the process.2. Visually examine each O-ring for imperfections. Ifany O-ring is damaged (by tears, cuts, or other imper-fections), discard it immediately. If any O-ring has dirt,sand, hair, or foreign matter on it , rinse the O-ring infresh water to remove it.3. When lubricating the various parts of your flash unit,use only the special non·water·soluble siliconelubricant supplied with the speedlight. Never useother lubricants (such as Vaseline) which are water-soluble.4. To lubricate the O-rings, smear a small amount of thespecial silicone lubricant on your fingertips and thengently run each O-ring between your fingertips. Neveruse a brush or similar object to apply the lubricant ;small hairs may fall into the channel and allow waterto enter the flash unit. While lubricating each O-ring ,examine it with your fingertips for imperfections. Ifan O-ring is properly lubricated it will glisten and wi llFig . 1not have "gobs" of lubricant on it. To ensure thelongest possible flash unit life, apply lubricant when-ever necessary. Lubrication protects the O-rings fromexcessive wear ; it also makes it easier to attach orremove other parts.5. Visually examine the channels into which the O-ringsfit to determine that each is clean and smooth . If anychannel is dirty, clean it with a non-lint-bearing mate-rial. Coat each channel with a thin film of lubricantwhile being careful not to apply too much.6. Reseat all of the O-rings with your fingertips by in -serting one side of the ring into the channel andholding it in position while rolling the other side of thering into place (see Fig . 3) . To insert the O-ring intothe channel of the synchro socket cover, push up onthe center of the cover with a fingertip (or pointedobject), place the ring over the channel, then pressit down into place. Check that the O-ring is not twistedand that each of its edges is properly seated (seeFig . 4).7. Check the surfaces which are opposite the O-ringsto determine that each is clean, smooth , and free offoreign matter. Clean and lubricate the surfaces inthe same manner as the channels .8. When reattaching the parts with O-rings, be sure thateach O-ring seats properly and securely. All of theO-rings must be properly aligned and not "pinched."