Runco Vx 3c Projector User Manual

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MAINTENANCE
Case!
Clean the case with a soft dampened cloth. Use a mild commercial cleaner\
. Do not use liquid or 
aerosol cleaners.
Figure 4.1. Replacing Keypad Batteries
4.3 Replacing Keypad Batteries The optional IR Remote Keypad uses four AA size, 1.5V batteries (prefer\
ably alkaline). To
install new batteries, open the battery compartment at the back side of \
the keypad by pulling on
the raised portion of the cover as shown (Figure 4.1). 
Remove the old batteries and properly discard. Wait a minute or two and place the new batter- 
ies in the compartment, orienting the positive/negative of each battery \
according to the labels in
the compartment. When batteries are in place, replace the cover by inser\
ting its bottom edge
first and snapping the top into place. Do not force. 
NOTE: Always wait a minute or two when replacing batteries so that the internal electronics 
discharge and can recognize the change. 
NOTE: For this p rocedu re you will need a VX-3 c Lamp and Filter Replacement Kit f rom
Runco.
The high brightness of your projector is provided by a 700 watt Xenon la\
mp permanently 
mounted inside its own protective housing. When the bulb approaches 1000\
 hours of usage, this
lamp assembly should be replaced. 
How Old is The Lamp? 
The number of hours logged on the current lamp appears both in the  Lampsubmenu (accessed
through the  Advancedmenu) and the  Statusmenu. In the  Status menu, do not confuse “Lamp
Hours” with “Lamp Counter”, which indicates the number of hours\
 logged during the ‘rental
period’, in a situation where the VX-3c is to be rented for various functions. In a permanent
install, this would be of no consequence. 
NOTE: As the lamp nears its limit (as set in  Lamp Limit), a message can appear on screen to
warn that the lamp needs to be replaced. To make sure that this warning appears, enter a 
checkmark in the  Lamp Message checkbox located in the  Lamp submenu. 
						

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MAINTENANCE
4.4 Replacing The Lens
A variety of lenses are available to accommodate different throw distances and specific types of
installations. See page 5-1 for details. To change a lens, follow the steps below.
NOTES: 1)You will need a 9/64”(3mm or 3.5mm) hex socket ball driver (supplied with projec-
tor) or allen wrench for this procedure. 2)“Top” or “bottom” references assume a non-invert-
ed projector, as illustrated. 3) If you are installing a lens, first make sure its Lens Adapteris
present on either the lens or projector. Such an adapter/flange secures to the projector in the
same manner as the flange described below, but accommodates a screw-mount lens.
STEP 1!Turn off the projector, cool, and unplug.
Before removing or installing a lens, turn off the projector and allow it to cool for five minutes
before unplugging. Make sure that the lens cap is on.
WARNING
Unplug the projector.
Install the lens cap.
STEP 2!Loosen the 3 lens mount screws
!IF FIXED LENS: Use the hex socket ball driver
provided with the projector to loosen the 3 lens
mount screws that secure the lens flange to the
mount-loosen these screws only, do not remove. See
Figure 4.10.
Figure 4.9. Install lens cap
!
Figure 4.10. Loosen 3 screws
- FIXED LENS - 
						

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MAINTENANCE
!IF ZOOM LENS: Access to the 3 lens mount
screws is likely blocked by the toothed zoom
ring in front of it. First rotate the zoom ring by
hand until its 3 access holes align with the
screws, then insert the hex socket ball driver
through the holes to loosen the screws-do not
remove. See Figure 4.11. 
STEP 3!Rotate the lens barrel slightly
!Using both hands, rotate the lens barrel coun-
terclockwise until the screw heads align with the
larger end of their slots on the lens. See Figure
4.12.
Figure 4.11. Align zoom gear ring to
access 3 screws
-ZOOM LENS-
Figure 4.12. Rotate slightly 
						

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MAINTENANCE
STEP 4!Pull lens assembly out
!See Figure 4.13. Carefully pull the lens
assembly straight out of the projector and set
aside.
STEP 5!Install new lens assembly
!IMPORTANT:Remove the rear (smallest)
lens cap from the new lens. Make sure the front
lens cap remains on during installation.
!See Figure 4.14. Align the large cut-out area
on the lens flange to the bottomof the lens
mount (which has a matching cut-out). The 3
lens assembly slots should align with the lens
mount screws so that the screw heads will fit
through the large end of the slots.
NOTE: On most lenses, a small extra “keying”
slot located at approximately 2 o’clock on the
lens flange will align with a set screw in the
same location on the lens mount, preventing the
lens from being installed in the wrong orienta-
tion. If the lens flange does not seem to fit into
place over all screws, try rotating the lens assembly in one direction or another.
Figure 4.13. Remove lens assembly
Figure 4.14. Orientation 
						

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MAINTENANCE
!With the lens assembly aligned and the screws inserted through the flange, use both hands to
rotate the lens barrel clockwise until the lens mount screw heads lock into the small end of the
lens assembly slots.
!Secure the 3 lens mount screws.
STEP 6!Reposition the projector for new lens
Remove the front lens cap and reposition the projector closer or further from the screen as nec-
essary for the screen and the new lens type (refer to lens descriptions in Section 2andSection 5
and Appendix E, Throw Distance). In a permanent installation, always use the appropriate throw
distance formula to calculate the distance accurately Power up and test. Adjust offsets as neces-
sary.
4.5   Troubleshooting
If the projector appears not to be operating properly, note the symptoms present and use the fol-
lowing guide to assist you. If you cannot resolve the problems yourself, contact your Runco
dealer for assistance.
NOTE: Always check the LCD status window at the rear of the projector for initial information
about a problem.
Symptom!The projector will not turn on when          is pressed...
CAUSE / REMEDY:
1. Make sure to hold         for approximately one second. Or press  quickly and release, and fol-
low with        .
2. Do both LEDs come on at the rear of the projector? Check that the power cord is properly
connected at the wall outlet (100-240 VAC, 50-60 Hz nominal) and that you are using the origi-
nal high-current 13A cable provided.
3. Does the green “Status” LED flash with each key press? If not, the projector is not receiving
the keypad’s IR signals. Ensure the keypad is directed at either the front or rear of the projector,
or at the screen. Also make sure that these paths are not blocked. Try the built-in keypad.
4. The batteries in the IR remote keypad may be weak. Refer to 4.3, Replacing Keypad
Batteriesfor instructions.
5. The IR keypad may have been disabled by a change in protocol. See 2.10,Keypad Protocols
and Conversionand 3.7, Adjusting System Parametersand .
6. Use the         key on the built-in keypad to turn the projector on.
Symptom!The projector is on but I can’t see display of source input...
CAUSE / REMEDY:
1. Was the lens cover accidentally left on? Remove lens cover.
2. Is the shutter closed? Is the projector in standby? Press          to clear.
3. Is an active source connected properly? Check the cable connections. And is the correct
source selected? Press         ,        ,        , or        to select. See 2.4, Source Connectionsand 3.5,
Working with Inputs and Channelsfor details.
4. Are there test patterns or menus present? If so, check your source connections again.
5. The room lighting may be too bright. Lower the intensity of the room lighting. Reduce light
reflections as much as possible.
6. Increase contrast and/or brightness of image.
7. The projector may be too far from the screen. Move the projector closer.
8. Is the “Status” LED flashing a pattern of yellow and red lights while the “Power” LED is 
Power*
Power*
   ON
Power*
Exit
 Input1 Input2 Input3 Input4 
						

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MAINTENANCE
steady red? This indicates an internal system error that may prevent the projector from operat-
ing. If the problem persists contact a qualified Runco service technician.
Symptom!The projector does not respond to the infrared remote keypad...
CAUSE / REMEDY:
1. Does the built-in keypad work? If so, check that the keypads are enabled.
2. Does the green “Status” LED flash each time a key is pressed? If not, the projector is not
receiving the keypad’s IR signals. Ensure the keypad is directed to either the front or rear of the
projector, or towards the screen.
3. The viewing path between the IR keypad and the projector (or screen) may be blocked.
Ensure there is a clear line-of-sight between the keypad and the projector (or screen).
4. The batteries in the IR remote keypad may be weak. Refer to 4.3, Replacing Keypad
Batteries for instructions on how to replace the batteries.
5. There may be unusual lighting conditions in the room affecting IR keypad operation.
Determine if such conditions exist and correct.
6. The IR keypad may have been disabled for use with this projector(s). Press     to enable
broadcasting to all projectors. See 2.10, Keypad Protocols and Conversion and 3.7, Adjusting
and Checking System Parameters for additional information.
Symptom!The power is on but the lamp is not...
CAUSE / REMEDY:
1. Does the LCD status window say “warming up”?
2. The projector probably became overheated (there is likely an error code flashing and a mes-
sage in the LCD status window). Allow to cool and make sure that nothing blocks projector
vents. Do not operate in environments warmer than 35°C (95°F).
3. The lamp may have reached the end of its life. Check the “Lamp Hours” via RS-232 request
‘lph?’.
Symptom!The display is jittery or unstable...
CAUSE / REMEDY:
1. If the display is jittery or if it disappears and reappears erratically, check that the source is
properly connected and that its signal is of adequate quality for detection. For example, it the
projector scans the default input  for a signal to display, and a poor quality or improperly con-
nected source is connected, the projector will briefly and repeatedly attempt to display an
image. If no source is connected, the “No signal present” error message appears over a blank
display. Correct the source connection.
2. The horizontal or vertical scan frequency of the input signal may be out of range of the pro-
jector. Refer to Section 5, Specifications for scan frequency ranges.
3. The sync signal may be inadequate. Correct the source problem.
4. The input signal type may conflict with the input module. Install/use the correct module for
the source.
5. Pixel tracking, phase, filter, etc. may need more adjustment.
Symptom!The display is faint...
CAUSE / REMEDY:
1. Check Input Levels option-turn auto to “off”, then “on” again.
2. Brightness and/or contrast may be set too low. Adjust as necessary.
3. Gamma may be set too low. Recommended setting for most signals is 2.2.
4. The projection room may be too bright. Lower the intensity of projection room lighting and
reduce light reflections as much as possible.
5. The projector may be too far from the screen. Move the projector closer. 
						

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MAINTENANCE
6. The location of the audience with respect to the screen may not be ideal. Make sure the audi-
ence is within the viewing angle set by the projector and screen position, and the screen type.
7. The source may be double terminated. Ensure the source is terminated only once.
8. The source (if non-video) may need sync tip clamping. Enter a check in the Clamp Tip box
found in the Input Levelssubmenu.
Symptom!The display is reversed and/or upside-down…
CAUSE / REMEDY:
1. The projectors image orientation is not set correctly for the current installation. Refer to2.6,
Operating Orientation to set the projectors image orientation to match your installation. 
Symptom!The upper portion of the display is waving, tearing or jittering…
CAUSE / REMEDY:
1. This can sometimes occur with video or VCR sources. If you are using a VCR, make sure
that the VCR option is checked (in Advancedmenu).
Symptom!Portions of the display are cut off or wrap to the opposite edge…
CAUSE / REMEDY:
1. Reduce top, bottom, left or right blanking from within theSize and Position menu. Check
size and position adjustments.
2. Resizing may need adjustment. Adjust until entire image is visible and centered.
Symptom!The display appears compressed or stretched…
CAUSE / REMEDY:
1. The frequency of the pixel sampling clock is incorrect for the current source.
2. TheSize and Position options may be adjusted poorly for the incoming source signal. See
3.6, Adjusting the Image.
Symptom!Display quality appears to drift from good to bad, bad to good…
CAUSE / REMEDY:
1. The operating temperature of the projector may be fluctuating. Watch that the projector is not
located too close to heating/air conditioning vents.
2. The source input signal may be of low quality.
3. The horizontal or vertical frequency of the input may have changed at the source end.
Symptom!The display has suddenly frozen, or an unknown menu has appeared…
CAUSE / REMEDY:
1. You may have accidentally entered a special engineering code using the          key in combi-
nation with certain numbers, or you may have selected the Freeze Image option. Press
as necessary to cancel the function and return to presentation level.
2. If the screen blacks out inexplicably, it is possible that excessive voltage noise on the AC or
ground input has interrupted the projectors ability to lock on to a signal. Turn the projector off,
wait for the lamp fans to stop, and unplug. Plug in again and power up as usual.
Symptom!The display is not sharp or clean…
CAUSE / REMEDY:
1. More display adjustment may be required-focus, brightness, contrast, pixel tracking, pixel
phase, and detail.
2. If you are using a BNC T-connector, try using a distribution amplifier to boost signal levels.
3. Is the video input signal properly terminated? Set in Preferences menu.
4. The screen size may be too large. As screen size increases, magnification increases, reducing
brightness and clarity. See lens specifications in Section 5.
5. The source input signal may be of low quality. Try another source.
Func
Exit 
						

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MAINTENANCE
Symptom!Colors in the display are inaccurate…
CAUSE / REMEDY:
1. The color, tint, gamma, color space and/or color temperature settings may require adjustment.
Review all settings, and refer to 3.6, Adjusting the Image and 3.7, Adjusting System Parameters
and Advanced Controls.
Symptom!The display is not rectangular…
CAUSE / REMEDY:
1. Check leveling of the projector. If necessary, try relocating the projector or screen so that the
lens surface and screen are approximately parallel
2. Is the vertical offset set correctly? Adjust as necessary using the vertical offset knob on the
front of the projector.
3. The Vertical Stretch option may need adjustment. Also check pixel tracking.
Symptom!The display is noisy…
CAUSE / REMEDY:
1. Display adjustment may be required. Adjust pixel tracking, phase and filter.
2. The video input may not be terminated. Make sure the video input is terminated (75 Ω). If it
is the last connection in a loop-through chain, the video input should be terminated at thelast
projector only.
3. The signal cables carrying the input signal may be of poor quality. Use only good quality sig-
nal cables.
4. The distance between the input source device and the projector may be too great. If the dis-
tance between the input source device and the projector is greater than 25 feet, signal amplifica-
tion/conditioning may be required.
5. The input signal may be of poor quality.
6. If the source is a VCR or off-air broadcast, detail may be set too high. Keep near 4 for most
sources. 
						

							5-1
5.1 SpecificationsNOTE: Due to continuing research, specifications are subject to change without notice.
Display !
Resolution
Pixel format (H x V) on 3 DMD panels 1024 X 768 (XGA) 
Maximum digitizing sample rate 160 Mega samples per second 
Video luminance bandwidth 5.5 MHz
Brightness Vista = 3000 ANSI lumens, typical
Contrast Ratio Greater than 250:1 ANSI
Greater than 400:1 full on/full off
Colors and Gray Scale Displayable colors 16.8 million
Gray scale resolution 8 bits
Color Temperature Default 6500K
Range of Adjustment 3200K to 9300K
Lenses !
Inputs !
Number of inputs   2 RGBHV (second input via plug-in module)
2 Video
4 Stereo Audio
Specifications
Lens  Type / Throw Ratio        Diagonal Screen Size (ft.)  Max. % of image Offset from Lens Center
0.8:1      5-25                 105%       100%        77%
1.2:1      5-30                 126%       133%        85%
1.5-2.2:1 zoom   5-40                  129%        117%         77%
2.2-4:1 zoom   5-40                  129%        117%         77%
4-7:1 zoom   8-40                  137%      126%        77% 
NOTES: 1) The VistaGRAPHX lens (see above) requires a threaded adapter/flange for ins\
tallation in this projector. 
2) Maximum offset percentages are reduced when simultaneously offsettin\
g horizontally and vertically. 
						

							5-2
SPECIFICATIONS
Analog RGB and YPbPr (INTERLACED OR PROGRESSIVE SCAN FORMAT)
Horizontal frequency range 15 - 120 kHz *
Vertical frequency range ** 24 -120 Hz
Pixel clock rate 10 - 160 MHz
Signal format Analog RGB or YPbPr
Input levels
R,B,G,Y - with sync 1.0Vp-p ±2 dB
R,G,B - without sync 0.7Vp-p ±2 dB
Pb,Pr 0.7Vp-p ±2 dB
DC offset ± 5V
Nominal impedance 75 ohms
Maximum return loss (VSWR) 1.2:1 dB @ 200 MHz
*   Display quality may be limited by pixel sampling rate when at the higher end of the frequency range.
** Maximum vertical output rate = 72  Hz. H and V frequencies of the input source and of the DMDs may not be the same.
Analog Video
Signal formats Composite, S-Video (Y/C)
Video standards NTSC, NTSC 4.43, PAL, PAL-M, 
PAL-N, PAL-60 & SECAM
Input level, Composite 1.0 Vp-p  ± 3db (including sync tip)
Input level, S-Video, Luma (Y) 1.0 Vp-p  ± 3db (including sync tip)
Input level, S-Video, Chroma (C) 630 mVp-p nominal (burst)
DC offset ± 5V
Nominal impedance 75 ohms
Maximum return loss (VSWR) 1.2:1 dB @ 6 mHz
Sync (INTERLACED OR PROGRESSIVE SCAN FORMAT)
Input levels 0.5Vp-p - 5.0Vp-p 
Impedance (for composite or separate H & V) 75 ohms
Sync type · Separate H and V
· Bi-level or tri-level sync-on-green
· Bi-level or tri-level composite 
Polarity Positive or negative
Duty cycles 0.10% - 20% vertical3% - 20% horizontal
Maximum return loss (VSWR) 1.2:1 dB @ 200 MHz
Audio
Number & type of inputs 4 pairs of phono plug
Nominal input and output level 1.0 Vp-p
DC offset ± 2V
Impedance 30k ohms ± 10k ohm
Volume control range -60 dB to +20 dB
Bandwidth (± 3 dB) 30 Hz to 20 kHz
RS-232 Serial Input
Number of connectors 3 (1 network in, 1 network out, 1 for 
switcher control)
Connector type 9 pin D
RS-422 Serial Input
Number of connectors 2
Connector type 6-pin XLR