Keystone 1157 instruction manual DVS-V Maintenance

DVS-V Maintenance

Under normal conditions of use, the DVS-V will require little maintenance if it is protected by a dust cover when not in use. Virtually no repair or adjustment will be needed, since all operat- ing component are protected and solid-state circuitry assures ex- ceptionally high reliability.

Cleaning

Periodically, some cleaning will be necessary. The main instru- ment housing and control unit should be dusted from time to time with a soft cloth or brush … and the lenses washed with soap and water and dried with a soft cloth or tissue.

If the instrument has become very soiled, it may be washed with a mild soap and water solu- tion or wiped with a general pur- pose spray cleaner. (Other sol- vents are not recommended.)

Be sure to disconnect the unit from its power supply before washing.

When the DVS-V is used in a heavy industrial environment, such as that of a foundry, it is possible that some dust may ac- cumulate on the stereo targets. In this case, remove the top cover of the instrument and care- fully dust the targets with a soft camel’s hair brush. The drum should not be removed. Instead, rotate it using the test advance / reverse buttons on the control panel.

If carrying the instrument long distances, Keystone View rec- ommends transporting it in its

specially-designed carrying case. (product #1140)

Lamp Replacement

Two Nichia NSPW515BS Long- Life Daylight LED’s lamps pro- vide illumination of the stereo targets. Although they are rated for a long duration of continuous use, replacement may eventually be required. Two extra lamps are included with the DVS-V, they are taped on the inside wall of the machine. Simply unscrew and remove the top panel in or- der to access the lamps.

Fuse Replacement

Astandard 3/4 ampere automo- tive-type fuse is incorporated in the circuitry of the DVS-V to protect the unit against possible electrical malfunction.

Should replacement ever be re- quired, order an 3 AG 3/4 amp. Fuse (1,25 inches long) from your distributor (Part No. 297- 800).

Target Drum Installation and Synchronization

The DVS-V Screener is shipped ready for operation, with the tar- get drum installed and synchro- nized with the control panel. Should the drum need to be re- placed or removed, instrument owners can reinstall the drum using the following guidelines:

Drum Removal: Push the spring clips outward from the end of the drum. Slide the drum towards the rear of the instrument (away from the gears) and lift it out.

Drum Replacement and Syn- chronization:

1)Turn power switch on. Slowly rotate the black position gear until the motor gear stops moving. Observe which signal light on the control panel is lit. This shows how the drum is to be installed.

2)To synchronize the target drum with the control, the drum must be inserted with the corre- sponding target facing the lens openings at the front.

Insert the drum downward be- tween the spring clips. Slide it forward toward the lenses until the clips snap in toward the drum. The drum gear cogs should now be engaged with the gears on both sides.

3)Press the test advance button on the control to move the drum to the next target. Look through the lenses to determine if the target is centered vertically in the lens openings.

4)If a centering adjustment is required, move only the left spring clip away from the drum and move left end of the drum backward and away from the gear. The gear must be disen- gaged from the drum cogs. Ro- tate the drum backward or for- ward to accomplish adjustment. Snap the drum back into posi- tion, re-engaging the gear. Re- check target alignment by look- ing through the lenses.

5)Repeat step 4 if necessary.

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