Runco Cl 420 Projector User Manual

							Maintenance and Troubleshooting
Runco CL-420 Owner’s Operating Manual 51 
5.7 
Troubleshooting Tips
Table 5-1 provides some general guidelines for troubleshooting problems you may 
encounter with the CL-420. If you encounter an issue not described here, please contact 
your Runco dealer or Runco Technical Support. 
Table 5-1. Troubleshooting Chart 
SymptomPossible Cause(s)Solution
The projector does not turn 
on after initial installation.  The CL-420 is not plugged 
in or the AC outlet is not 
active. 
The remote control 
batteries have run out. 
 Ensure that the CL-420 is 
plugged in and that the AC 
outlet is active. 
 Replace the batteries. 
The projector is on, but there 
is no video image on-screen.  Incorrect source selection. 
 Source component is not 
turned on. 
 Select the correct source. 
 Turn on the source 
component. 
A projected image from a 
DVD is split or otherwise 
scrambled.  DVD player is set to 
progressive scan mode.  Turn off progressive scan 
on the DVD player. 
 Connect the DVD player to 
the HD/RGB 1 or 
HD/RGB
 2 input. 
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. The Red/Pr, Green/Y or 
Blue/Pb outputs from the 
source are connected to 
the wrong inputs on the 
CL-420.  Ensure that the source 
outputs are connected to 
the correct CL-420 input. 
RGB-HD images appear 
“noisy.” Clock and Phase settings 
need adjustment.  Manually adjust Clock and 
Phase settings, or perform 
an Auto-Tune (refer to 
HD/RGB Adjust on 
page 40).
The projector will not turn 
back on after it was powered 
down, or the image 
disappears during operation.  The projector will not turn 
on for two minutes after 
power-down, to protect 
the lamp. 
 The lamp has failed or was 
improperly installed. 
 Wait until the cooling fan 
stops. 
 
 
 Replace or re-install the 
lamp.  
						

							Maintenance and Troubleshooting
52 Runco CL-420 Owner’s Operating Manual
Notes: 
						

							Runco CL-420 Owner’s Operating Manual 53 
6.1 
RS-232 Connection 
and Port Configuration
To interface the CL-420 with a home theater automation/control system or a PC running 
terminal emulation software, connect it to your control system or PC as shown in 
Figure 
3-12. 
Configure the RS-232 controller or PC serial port as follows: no parity, 8 data bits, 1 stop 
bit and no flow control. Set the baud rate to 9600, to match that of the CL-420 RS-232 
port. 
6.2 
Serial Command 
Syntax
Table 6-1 lists the RS-232 command set. All commands are in ASCII format and must be 
in UPPERCASE. 
When you send a valid command, the CL-420 executes it and acknowledges it with the 
first three characters of the command followed by “OK;” for example, “RRAOK.“ When you 
send an invalid command, the CL-420 ignores it and returns the first three characters of 
the command followed by “NG;” for example, “RRXNG.“
6. Serial Communications
Table 6-1. Serial Commands 
CommandDescriptionReply
RRA00Saves current settings to the CUSTOM 1 memory 
(Note
 1)
RRAOK
RRA01Saves current settings to the ISF Day memory 
(Note
 1)
RRAOK
RRA02Saves current settings to the ISF Night memory 
(Note
 1)
RRAOK
RRB00Recalls the Custom 1 memory settingsRRBOK
RRB01Recalls the ISF Day memory settingsRRBOK
RRB02Recalls the ISF Night settingsRRBOK
RRC00Selects the S-VIDEO inputRRCOK
RRC01Selects the COMPOSITE VIDEO inputRRCOK
RRC02Selects the COMPONENT 1 inputRRCOK
RRC03Selects the COMPONENT 2 inputRRCOK
RRC04Selects the DVI inputRRCOK
RRC05Selects the RGB inputRRCOK
Notes:
1. All image quality settings must be made with the remote control. After the image adjustments 
are complete, you can use these commands to store the settings in the selected memory.
2. The power on command (PON) will not provide an OK reply; it will instead reply with a random 
character. For your automation system, simply ensure that you receive a character after the 
PON command. If you do not get any reply after PON, send PON again. 
						

							Serial Communications
54 Runco CL-420 Owner’s Operating Manual
RRD00Selects the ANAMORPHIC (16:9) aspect ratioRRDOK
RRD01Selects the STANDARD (4:3) aspect ratioRRDOK
RRD02Selects the LETTERBOX aspect ratioRRDOK
RRD03Selects the VIRTUALWIDE aspect ratioRRDOK
RRD04Selects the CINEMA (2.35:1) aspect ratioRRDOK
RRD05Selects the VIRTUAL CINEMA aspect ratioRRDOK
RRE00Turns the projector OFFRREOK
PONTurns the projector ONRandom (Note 2)
Table 6-1. Serial Commands (continued)
Command Description Reply
Notes:
1. All image quality settings must be made with the remote control. After the image adjustments 
are complete, you can use these commands to store the settings in the selected memory.
2. The power on command (PON) will not provide an OK reply; it will instead reply with a random 
character. For your automation system, simply ensure that you receive a character after the 
PON command. If you do not get any reply after PON, send PON again. 
						

							Runco CL-420 Owner’s Operating Manual 55 
7.1 
CL-420 Specifications
Table 7-1 lists the CL-420 specifications.  
7. Specifications
Table 7-1. CL-420 Specifications 
Projector Type:Digital Light Processing (DLP), single-chip SuperOnyx™ 
DMD
Native Resolution:1280 x 720 (16:9)
Aspect Ratios:4:3, Letterbox, 16:9 Anamorphic, VirtualWide, Cinema, 
Virtual Cinema
Video Standards:NTSC, PAL, SECAM
Scan Frequency:Horizontal: 15 - 80 kHz 
Vertical: 43 - 100 Hz
Picture Size (16:9 Screen):Recommended Width: 72 to 120 in. 
Maximum Width: 150 in.
Throw Distance 
(Factor x Screen Width):Minimum: Screen Width x 1.40
Maximum: Screen Width x 1.70
Horizontal and Vertical Offset:Horizontal -- 8% of screen width left or right 
Vertical (when ceiling-mounted) --  
63% of screen height below;  
46% of screen height above
Vertical (when floor-mounted) --  
46% of screen height below;  
63% of screen height above
Lamp:250 Watts
Estimated Lamp Life: 2000 hours
Source Inputs: (1) Composite; (1) S-Video; (2) RCA Component (YPbPr); 
(1) VGA; (1) DVI with HDCP
Control Options:- Discrete infrared remote
- Serial commands via RS-232
RS-232 Communication 
Parameters:9600 bps, no parity, 8 data bits, 1 stop bit, no flow control 
+12V Output:0.25 Amps, active when the projector is turned on
Power Requirements: 100 to 240 VAC (auto-sensing), 50/60 Hz, 370 Watts
Operating Environment:41°F to 95°F (5°C to 35°C), 0% to 90% humidity 
(non-condensing) 
Dimensions:See Figure 7-1
Weight (including lens):25 lbs. (11.34 kg) 
						

							Specifications
56 Runco CL-420 Owner’s Operating Manual
Brightness and Contrast:Cinema Standards Measurement System (CSMS) 
Specifications
- Brightness: 19 foot-Lamberts (fL)
- Contrast Ratio: 245:1
These measurements are taken from the projector in a controlled, 
home theater environment. All measurements are made to 
ANSI/NAPM IT7.228-1997 specifications using the Photo 
Research PR-650 SpectraColorimeter and Minolta LS-100 
Luminance Meter, Video Essentials test DVD and a 1.3 gain, 
72-inch wide screen. The projector is calibrated to a color 
temperature of 6,500K and has a minimum of 150 hours of usage.
The foot-Lambert (fL) is the unit of measurement used in 
commercial movie theaters to express image brightness at the 
screen surface. The Society of Motion Picture and Television 
Engineers (SMPTE) specifies 16 fL as the target image brightness 
for film-based projectors using an open gate (without film in the 
projector). More importantly, today SMPTE specifies 12 fL as the 
target image brightness in Digital Cinema theaters. The 
foot-Lambert measurement is dependent on screen size, screen 
gain and projector light output.
Home Theater Calibration Specifications
- Light Output: 457 ANSI Lumens
- Contrast Ratio: 245:1
These specifications are obtained by calibrating the projector as 
described above for CSMS measurements. 
Industry-Standard Specifications
- Light Output: 1200 ANSI Lumens
- Contrast Ratio: 2800:1
These are typical projector brightness and contrast specifications 
found in most companies’ sales literature. Runco includes these 
measurements in its literature to allow for direct comparison with 
other manufacturers’ projectors. These measurements are 
typically taken at 9,000K to 13,000K to get expected performance 
data when the projector is used in professional, commercial and 
industrial displays.
Regulatory Approvals:Complies with FCC, CE C-Tick
Limited Warranty: Projector: Two (2) years parts and labor from the date of 
delivery to the end user.
Lamp: 1000 hours or six (6) months, whichever comes first. 
Specifications are subject to change without notice. 
Table 7-1. CL-420 Specifications (continued) 
						

							Specifications
Runco CL-420 Owner’s Operating Manual 57 
7.2 
CL-420 Dimensions
Figure 7-1 shows the CL-420 dimensions. 
Figure 7-1. CL-420 Dimensions
3.425 in
87.0 mm3.425 in
87.0 mm 13.98 in
355.0 mm
8.276 in
210.2 mm5.701 in
144.8 mm
6.457 in
164.0 mm
0.8976 in
22.8 mm
7.354 in
186.8 mm7.354 in
186.8 mm 6.661 in
169.2 mm16.34 in
415.0 mm
16.85 in
428.0 mm0.1969 in
5.0 mm 16.12 in
409.5 mm 4.157 in
105.6 mm 
						

							Specifications
58 Runco CL-420 Owner’s Operating Manual
7.3 
Computer Signal 
Compatibility
The CL-420 can display video signals from a variety of computer sources via its RGB-HD 
and DVI inputs. It is compatible with the three most common sync modes -- 
sync-on-green, composite sync and RGB with separate sync -- as well as XGA display 
adapters that use advanced intelligent compression.
Table 7-2 lists the signal types that are compatible with the CL-420, and indicates which 
of those are VESA standards.
Table 7-2. Computer Signal Compatibility Chart 
PC/MAC/
WSResolution
Horizontal 
Frequency 
(kHz)Vertical 
Frequency 
(Hz)VESA 
StandardDVI 
SupportDisplay
PCVGA
640 x 350
27.060
Upscale
31.570
37.985√
720 x 35027.060
31.570
640 x 400
27.060√
31.570√
37.985√√
720 x 400
27.060√
31.570√
37.985√√
640 x 480
26.250√
31.560√
36.870√
37.972√√
37.575√√
43.385√√
47.990√
53.0100√
PCSVGA800 x 600
31.450√
Upscale
35.156√√
37.960√√
44.570√
48.172√√
46.975√√
Notes:
1. This projector may not be able to display images from notebook computers in simultaneous 
(CRT/LCD) mode. Should this occur, switch the notebook computer to “CRT only” mode. If you 
are unsure how to do this, refer to your notebook computer’s user manual.
2. When this projector receives 640 × 350 VESA format VGA signals, “640 × 400” appears on the 
screen.
3. Interlaced video signals received through the RGB input may not display correctly. If this occurs, 
use the Component 1, Component 2, S-video or Composite video input instead. 
						

							Specifications
Runco CL-420 Owner’s Operating Manual 59 
PCSVGA800 x 600
53.785√√
Upscale56.890√
64.0100√
PCXGA1024 x 768
35.543√
True
40.350√
48.460√√
56.570√√
60.075√√
68.785√√
73.590√
77.296
80.6100
MAC 13”VGA640 x 48034.967UpscaleMAC 16”SVGA832 x 62449.675
MAC 19”XGA1024 x 76848.460√True
Table 7-2. Computer Signal Compatibility Chart (continued)
PC/MAC/
WSResolutionHorizontal 
Frequency 
(kHz)Vertical 
Frequency 
(Hz)VESA 
StandardDVI 
SupportDisplay
Notes:
1. This projector may not be able to display images from notebook computers in simultaneous 
(CRT/LCD) mode. Should this occur, switch the notebook computer to “CRT only” mode. If you 
are unsure how to do this, refer to your notebook computer’s user manual.
2. When this projector receives 640 × 350 VESA format VGA signals, “640 × 400” appears on the 
screen.
3. Interlaced video signals received through the RGB input may not display correctly. If this occurs, 
use the Component 1, Component 2, S-video or Composite video input instead. 
						

							Specifications
60 Runco CL-420 Owner’s Operating Manual
7.4 
Video Signal 
Compatibility
Table 7-3 lists numerous common video signal formats and indicates which input(s) on the 
CL-420 can accept a given format. 
Table 7-3. Video Signal Compatibility Chart 
ResolutionH-Freq 
(kHz)V-Freq 
(Hz)Compatible Inputs (Note 1)
Comp. 
1Comp. 
2S-
VideoCom-
positeVGADVI
SD 
Video
NTSC640 x 
480i15.7359.94/
60√√√√
PAL768 x 
576i15.6350√√√√
SECAM√√√√
NTSC-
4.43
(adjustment required)
PAL-M
PAL-N
NTSC-
J
PAL-60
NTSC-
50(not supported)
EDTV
480p720 x 
480p31.559.94/
60√√√√
576p720 x 
576p31.350√√√√
HDTV
1080i/
50
1920 x
1080i28.150√√√√
1080i/
6033.859.94/
60√√√√
720p/
50
1280 x
720p37.550√√√√
720p/
6045.059.94/
60√√√√
HTPC
(Note 
2)
720p/
48
1280 x
720p48√
720p/
7575√
576p/
481024 x
576p48√
Notes: 
1. The Component 1 and Component 2 inputs accept both analog (YPbPr) and digital (YCbCr) 
signals. 
2. HTPC = Home Theater PC