Runco Sc 1 Projector User Manual

							Maintenance and Troubleshooting
Runco SC-1 Owner’s Operating Manual 89 
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5.3 
Maintenance and 
Cleaning
To help ensure optimized performance and reliability, check electrical, optical and other 
components regularly as described below. 
ElectricalDo the following every 60 days or 500 hours of projector use: 
 Check the contact surfaces of the positive (anode) and cathode (negative) connections 
for cleanliness. Clean electrical contact surfaces as necessary to prevent contact 
resistance from scorching connectors. 
 Verify that all electrical and lamp connections are tight. 
OpticalUnnecessary cleaning of optics can be more harmful than helpful, increasing the risk of 
degrading delicate coatings and surfaces. In this projector, check only the lens and lamp 
reflector — maintenance of other optical components requires a qualified service 
technician. Check these components periodically in a clean, dust-free environment using 
a high-intensity light source or flashlight. Clean them only when dust, dirt, oil or other 
marks are obvious. Never touch an optical surface with your bare hand; always wear latex 
lab gloves. 
When to Check the Lens: A small amount of dust or dirt on the lens has minimal effect 
on image quality — to avoid the risk of scratching the lens, clean the lens only if absolutely 
required; see below. 
When to Check the Lamp Reflector: Inspect the mirror surface (reflector) for 
cleanliness only during a lamp replacement, when the lamp is out. If necessary, clean as 
described below. Always wear protective clothing while inspecting or cleaning. 
Note that color on the reflector surface may vary; this is normal. 
Required Materials and 
Supplies
For cleaning off dust and/or grease, you will need: 
 Soft camel-hair brush. 
 Dust-free blower — filtered dry nitrogen blown through an anti-static nozzle. 
 Dust-free lens tissue: Melles Griot® Kodak tissues (18LAB020), Optowipes™ 
(18LAB022), Kimwipes® or equivalent. 
 Lens cleaning solution: Melles Griot Optics Cleaning Fluid 18LAB011 or equivalent (for 
lens only). 
 Methanol (for reflector only). 
 Cotton swabs with wooden stems only 
 Lens cleaning cloth/microfiber: Melles Griot 18LAB024 or equivalent. 
If the exhaust duct becomes significantly blocked — or if a fan 
fails
 — the projector’s airflow sensor should trigger a shutdown 
before the projector becomes overheated or unsafe. Regardless, 
check the airflow periodically. Note
SHOCK HAZARD. Turn off the SC-1 and disconnect it from AC 
before performing any maintenance or cleaning. WARNING 
						

							Maintenance and Troubleshooting
90 Runco SC-1 Owner’s Operating Manual
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Cleaning the LensRemoving Dust: 
1. Brush most of the dust off with a camel-hair brush and/or blow dust away with 
compressed air. 
2. Fold a microfibre cloth smooth and gently wipe remaining dust particles off the lens. 
Make sure to wipe evenly with the smooth portion of the cloth that has no folds or 
creases. Do not apply pressure with your fingers — use the tension in the folded cloth 
itself to collect the dust. 
3. If significant dust is still bound to the surface, dampen a clean microfibre cloth with 
lens cleaning solution (damp, not dripping). Wipe gently until clean. 
Removing Fingerprints, Smudges, Oil and Other Substances: 
1. Brush most of the dust off with a camel-hair brush and/or blow dust away with 
compressed air. 
2. Roll a lens tissue around a swab and soak in lens cleaning solution. The tissue should 
be damp but not dripping. 
3. Gently wipe the surface using a figure-8 motion. Repeat until blemish is removed. 
Cleaning the ReflectorRemoving Dust: 
1. Brush most of the dust off with a camel-hair brush and/or blow dust away with 
compressed air. 
2. If some dust remains, just leave as is — air circulating at the lamp is unfiltered, so 
some dust is inevitable. Avoid unnecessary cleaning. 
Removing Fingerprints, Smudges, Oil and Other Substances: 
1. Brush dust off with a camel-hair brush and/or blow dust away with compressed air. 
2. Fold a clean microfibre cloth and dampen with methanol. Make sure to wipe evenly 
with the smooth portion of the cloth that has no folds or creases. Do not apply 
pressure with your fingers; use the solution in the cloth to collect the dirt. 
Cleaning Other 
Components
In a normal operating environment check, clean and treat the following components every 
six months or so to help ensure proper lamp and projector function: 
Lamp Fan: A clogged lamp fan impeller or motor can reduce air flow, leading to possible 
overheating and failure of the lamp. Clean and treat the impeller as follows: 
1. Vacuum loose dirt from the lamp fan impeller. 
2. If necessary, use a brush with hot water and suitable detergent. 
Igniter: Clean the high voltage terminal and insulator to remove accumulated dust or dirt. 
➤
➤
➤
Do not bend the impeller blades or loosen the balancing weights. WARNING 
						

							Maintenance and Troubleshooting
Runco SC-1 Owner’s Operating Manual 91 
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Air Flow Interlocks: The lamp fan vane switch is located within the lamp cooling 
compartment. The extractor vane switch is located just inside the top exhaust duct on the 
projector. Check and, if necessary, clean the switches to remove accumulated dust or dirt 
that could impede movement. 
Within the exhaust duct connected at the top of the projector, adequate airflow must be 
maintained and routed away from the operating area surrounding the projector. Inspect 
regularly and confirm that:
 There are no obstructions or “kinks” within the ducting.
 All air intake areas of the projection head and ballast are unobstructed.
 Exhaust airflow at the top vent is at least 600 CFM. Make sure lamp wiring does not 
interfere with vane switch operation. Refer to 
Maintaining Proper Cooling on 
page 88. 
Laminar Airflow Device (LAD): Whenever you check or replace the air filter on the side 
of the projector, also visually check the small square laminar airflow device just beyond the 
filter opening. The LAD should be nearly white in color. If it is very dark (rare), it may need 
to be replaced by a qualified service technician. Contact Runco or your dealer. 
5.4 
Lamp and Filter 
Replacement
The SC-1 uses a xenon lamp to deliver its high brightness. The lamp should be replaced 
when it reaches the end of its life (typically 1000 hours), or sooner if a noticeable 
degradation in brightness occurs. When you replace a lamp, you should replace the air 
filter as well. 
Keep track of the number of hours the lamp has been in use and be aware of any changes 
to brightness. These indicators will help you effectively maintain operation of the projector. 
To find out how long the currently-installed lamp has been in service, select Lamp Hours 
from the DHD Controller Installation menu (available by selecting Service -> Display 
Device -> Configure -> Installation, in sequence). 
Lamp ReplacementFor lamp or filter replacement, please contact your nearest Runco authorized 
service center or Runco dealer. Do not attempt to replace the lamp yourself!
1.Turn off the projector. Allow the projector cooling fans to run for at least 10 minutes 
prior to disconnecting the power cord and removing the lamp assembly for 
replacement.
2. Disconnect the AC power cord from the projector.
3. Remove the screw holding the lamp/air filter cover in place. Then, lift the cover up and 
away from the projector (see 
Figure 3-6). 
4. Turn the knob to open the inner lamp cooling compartment and reveal the cathode 
end (–) of the lamp (see 
Figure 3-6). 
Xenon arc lamps are under high pressure and must be handled 
with great care at all times. Lamps may explode if dropped or 
mishandled. Allow the lamp to cool completely before attempting to 
remove it. 
Never open the lamp door unless you are wearing protective 
clothing. Recommended protective clothing includes — but may 
not be limited to — protective gloves, latex lab gloves, a 
double-layer 0.040” acetate face shield, and a quilted ballistic nylon 
jacket or welder’s jacket. 
WARNING 
						

							Maintenance and Troubleshooting
92 Runco SC-1 Owner’s Operating Manual
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5. Using a hex wrench of the appropriate size, loosen the set screws from the 
negative/cathode (rear, 7/64”) and positive/anode (front, 3/16”) lamp connectors; see 
Figure 5-1. Apply minimal torque and DO NOT stress the quartz tube. 
Figure 5-1. Disconnecting the Old Lamp
6.Carefully slip the positive anode connector off the front of the lamp.
7. Handling by the cathode end only, unscrew the lamp from the rear connector and 
carefully remove it from the projector. Immediately place the lamp inside the protective 
cover (saved from previous installation) and then seal it in a heavy carton on the floor 
where it cannot fall or be bumped. 
8. With the lamp removed, visually inspect the reflector for dust. Clean if necessary as 
described in When to Check the Lamp Reflector on page 89.  
9.Remove the new lamp from its protective cover: Remove the tape, knurled nut 
and locking star washer (if present) securing the lamp within its cover. 
10. Handling at the ends only, extract the lamp from the cover. Set aside the protective 
cover for re-use in your next lamp disposal or for warranty return of an expired lamp. 
11.Install new lamp: With protective clothing and face shield on, insert the threaded 
cathode (–) end of the lamp into the negative lamp connector nut located in the rear of 
the lamp compartment and screw in fully; see 
Figure 5-2. Hand-tighten only. 
 
Handle the box with extreme caution. The lamp is hazardous even 
when packaged. Dispose of the lamp box according to local 
safety regulations. 
Handle the lamp by the cathode/anode end shafts only, never the 
glass. Do not over-tighten or stress the glass.
Remove anode connector
Remove cathode connector
(inside lamp cooling compartment)
WARNING
WARNING 
						

							Maintenance and Troubleshooting
Runco SC-1 Owner’s Operating Manual 93 
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Figure 5-2. Installing A New Lamp
12. Rest the anode (+) end of the lamp on the lamp cradle as shown in Figure 5-2. Then, 
slip the positive lamp connector over the bulb end. 
13. Tighten the set screws in both negative and positive lamp connectors; see Figure 5-3. 
If you accidentally touch the quartz body of the lamp with your bare hands, clean the 
surface as described in Maintenance and Cleaning on page 89.  
Figure 5-3. Securing Lamp Anode (+) and Cathode (-) Connectors 
						

							Maintenance and Troubleshooting
94 Runco SC-1 Owner’s Operating Manual
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14.Check Leads: Make sure that the anode (+) lead between lamp and igniter is well 
away from any projector metal such as the reflector or firewall. 
 
15. Close the inner lamp cooling compartment door and turn the knob clockwise to 
secure it. 
16. Replace the lamp/air filter cover and tighten the screw to secure it. 
17. Re-attach the AC power cord to the projector.
18. If the new lamp is the same size as the replaced lamp, continue with Step 19. 
Otherwise, specify the new lamp size; refer to Defining the Installed Lamp Size on 
page 44.
19. Turn the projector back on. Allow the projector and lamp to warm up for 
approximately 10 minutes before continuing.
20.Adjust Lamp Position: Perform the steps listed in Maximizing Light Output on 
page 46. 
Record the New Lamp Serial Number: 
21. Press MENU on the projector remote control (Figure 3-29) or control panel 
(Figure 2-3). 
22. Select Lamp from the Main Menu. 
23. Select Change Lamp from the Lamp menu. 
24. Enter the serial number in the Lamp S/N text box using the remote numeric keypad.
25. Press ENTER to accept the change. This adds the new lamp serial number to the 
Lamp History menu and resets the Lamp Hours timer to “0.” Lamp Mode and Lamp 
Limit remain as they were for the previous lamp and can be changed at any time. 
Figure 5-4. Recording the Serial Number of a New Lamp
Leads too close to metal parts will cause arcing during starting 
pulse. This is a SAFETY HAZARD, and the lamp may not ignite. 
WARNING 
						

							Maintenance and Troubleshooting
Runco SC-1 Owner’s Operating Manual 95 
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Filter ReplacementWhenever you replace the lamp – or more often if the projector is installed in an extremely 
dusty environment – you should also replace the air filter. The filter is located on the lamp 
side of the projection head, near the front (see 
Figure 2-1). 
1.Turn off the projector. Allow the projector cooling fans to run for at least 10 minutes 
prior to disconnecting the power cord and removing the lamp assembly for 
replacement.
2. Disconnect the AC power cord from the projector.
3. Remove the screw holding the lamp/air filter cover in place. Then, lift the cover up and 
away from the projector (see 
Figure 3-6). 
4. Slide the old filter down and out, then discard. 
5. Insert the new air filter, following the labeling for proper inside/outside orientation. 
Slide all the way up, under top tabs. 
6. Replace the lamp/air filter cover and tighten the screw to secure it. 
5.5 
Lens Replacement
If you need to remove the lens – either to replace it or to prepare the projector for 
shipment – see 
Figure 3-5 and proceed as follows: 
1. Power down the projector and wait at least 10 minutes to allow the lamp to cool. 
2. Remove the secondary anamorphic lens, if present. 
3. Place the lens cap on the installed lens to protect it from damage. 
4. Release the lens safety tether from the lens ring clamp (if installed). 
5. Turn the lens locking lever to the “unlocked” (UP) position.
6. Pull the lens straight out. 
If you are installing a new lens, refer to Installing the Primary Lens on page 24. 
Always record the serial number of a new lamp. Do this only if you 
have just installed a new lamp. This will ensure that the lamp timer 
is not reset on an old lamp and that the number of hours logged on 
the lamp is accurate.Note
Use only Runco filters. Never operate the projector without the filter 
installed. WARNING 
						

							Maintenance and Troubleshooting
96 Runco SC-1 Owner’s Operating Manual
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5.6 
Troubleshooting Tips
Table 5-1 provides some general guidelines for troubleshooting problems you may 
encounter with the SC-1. If the suggested solutions fail to resolve the problem or if you 
encounter an issue not described here, please contact Runco Technical Support. 
Table 5-1. Troubleshooting Chart 
SymptomPossible Cause(s)Solution
The projector does not turn 
on.  The SC-1 is not plugged in 
or the AC outlet is not 
active. 
 The DHD Controller is not 
plugged in or the AC outlet 
is not active. 
 

batteries have run out. 
 The serial connection from 
the DHD Controller to the 
SC-1 is faulty or incorrect. 
 Ensure that the SC-1 is 
plugged in and that the AC 
outlet is active. 
 Ensure that the DHD 
Controller is plugged in 
and that the AC outlet is 
active. 
 Replace the batteries.  
 Ensure that the RS-232 
output from the DHD 
Controller is properly 
connected to the RS-232C 
input on the SC-1 (see 
Figure 3-13). 
The projector and DHD 
Controller are both on, but 
there is no picture and 
on-screen menus do not 
appear.  Lens cover is on or shutter 
is closed. 
 
 Lamp failed to ignite.  
 
 
 Faulty or incorrect video 
connection between the 
DHD Controller and the 
SC-1. 
 
 Ensure that the lens cover 
is off and the shutter is 
open. 
 Ensure that the lamp door 
is closed. If it is and the 
problem persists, replace 
the lamp. 
 Ensure that the HDMI 
output from the DHD 
Controller is properly 
connected to Input 2 (DVI) 
on the SC-1 (see 
Figure 
3-13). 
The display is on and menus 
appear, but there is no 
picture.  Incorrect source selection. 
 Source component is not 
turned on. 
 Source component is 
connected incorrectly or 
not at all. 
 Select the correct source. 
 Turn on the source 
component. 
 Check connections from 
source component to DHD 
Controller. 
A projected image from a 
DVD is split or otherwise 
scrambled.  DVD player is connected 
to the Component input 
and set to progressive 
scan mode.  Turn off progressive scan 
on the DVD player. Or, 
connect the DVD player to 
the HD1 or HD2 input. 
Image appears “squeezed” or 
vertically stretched into cen
-
ter of screen. 
 Incorrect aspect ratio 
selection.  Select a different aspect 
ratio.  
						

							Maintenance and Troubleshooting
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The display is jittery or 
unstable. Poor-quality or improperly 
connected source. 
 
 
 The horizontal or vertical 
scan frequency of the 
input signal may be out of 
range for the projector. 
 Ensure that the source is 
properly connected and of 
adequate quality for 
detection. 
 Correct at the source. 
Image is too bright and/or 
lacks definition in the bright 
areas of the image.  Contrast is set too high.  Lower the contrast setting. 
Image appears “washed out” 
and/or dark areas appear too 
bright.  Brightness is set too high.  Lower the brightness 
setting. 
Colors in the image are 
swapped; for example, reds 
appear blue or vice versa. 
Blue/Pb outputs from the 
source are connected to 
the wrong inputs on the 
DHD Controller.  Ensure that the source 
outputs are connected to 
the correct DHD Controller 
input. 
The display freezes suddenly.  Excessive voltage noise on 
the AC or ground input has 
interrupted the projector’s 
ability to lock on to a 
signal. Power down the projector 
and disconnect from AC. 
Then, plug in again and 
power up as usual.
The projector will not turn 
back on after it was powered 
down, or the image disap
-
pears during operation. 
 The projector will not turn 
on for several minutes after 
power-down, to protect 
the lamp. 
 The lamp has failed. 
 Wait until the LED at the 
front of the DHD Controller 
turns red. 
 
 Replace the lamp. 
AutoScope lens motor does 
not work. The motor is not plugged 
in and turned on, or the AC 
outlet is not active. 
 
 The motor is not 
connected to a trigger 
output on the DHD 
Controller. 
 Incorrect trigger 
assignment. 
 Ensure that the motor is 
plugged in and turned on, 
and that the AC outlet is 
active. 
 Check the trigger 
connection between the 
lens motor and DHD 
Controller (
Figure 3-18). 
 Correct the trigger 
assignment (refer to 
Configure Lens Motor 
Trigger on page 51). 
Table 5-1. Troubleshooting Chart (continued)
Symptom Possible Cause(s)Solution 
						

							Maintenance and Troubleshooting
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Error CodesIf the status code display on the back of the projector shows one of the following values, 
you have encountered a likely system error requiring the attention of a qualified service 
technician. Acknowledge and clear the error by pressing EXIT twice on the rear-panel 
keypad. Try resetting the projector by powering it off, allowing it to cool and powering it on 
again. Refer to 
Table 5-2 and contact your dealer if the problem persists. 
The specific code number identifies the source of the error detected, and is particularly 
useful in cases where the projector is far away. For example, the code “27” means the 
lamp could not be turned on. 
 
➤
Table 5-2. SC-1 Error Codes 
CodeDescription
General
12Software bug. Contact dealer or Runco Technical Support. 
13CRC error in flash ROM. Download new software. 
14Engineering-only programming is complete. Contact Runco, replace TIPM. 
15Attempting to download code without being in boot mode. 
16Invalid interrupt. Power off/on. If it persists, contact dealer or Runco Technical 
Support. 
17User forced system to stay in boot mode. 
18Jumper for programming boot not installed. 
Lamp Failures
20Lamp turned on unexpectedly (fault related to ballast). 
22One or more high-current lamp cables is not connected. 
26Lamp 1 Interlock: lamp door open, lamp not installed. 
27Can’t turn lamp on. 
28Lamp turned off unexpectedly. 
29Lamp ballast overheated. 
2CLamp communications fault; ballast is not detected. 
Note: To clear a system error, press the EXIT key (on the SC-1 control panel) twice. If necessary, 
reset the projector by powering it off, allowing it to cool and powering it on again. Contact your 
Runco dealer or Runco technical support if the error persists.