Sony VPL-CX21 User Manual (English)

Questions and Answers:

J
Joanne WilliamsAug 20, 2025
Why does my Sony VPL-CX21 Projector show no picture?
- T
  Thomas CervantesAug 20, 2025
  If your Sony Projector shows no picture, first ensure all cables are properly connected. If you're connecting a computer, and it's DDC2B compatible, turn on the projector after connecting it to the computer, and then start the computer. Also, verify you've selected the correct input source using the INPUT key. Finally, ensure your computer signal is set to output to an external monitor only. You may need to adjust your computer settings or press specific keys to switch the output.
S
Scott PerkinsAug 22, 2025
How to fix the too dark picture on Sony VPL-CX21?
- W
  wrightsusanAug 22, 2025
  If your Sony Projector's picture is too dark, try adjusting the contrast or brightness in the 'Adjust Picture...' menu of the Picture menu. If that doesn't help, the lamp may be burnt out or dim and needs replacing.
B
browndianaAug 25, 2025
How to fix Sony VPL-CX21 if the power is not turned on?
- D
  Daniel ParkerAug 25, 2025
  If your Sony Projector's power is not turning on, it might be because the power was recently turned off and on too quickly. Wait about 45 seconds before trying to turn it on again. Also, make sure the lamp cover and the air filter cover are securely closed and attached, respectively.
V
Victor BarnettAug 26, 2025
What to do if LAMP/COVER indicator flashes on Sony VPL-CX21?
- J
  Jacqueline FernandezAug 26, 2025
  If the LAMP/COVER indicator on your Sony Projector is flashing, it means the lamp cover or the air filter cover is detached. Attach the cover securely.
T
thomas72Aug 27, 2025
How to fix the unclear picture on Sony VPL-CX21 Projector?
- K
  Katie BellAug 28, 2025
  If the picture on your Sony Projector is not clear, first adjust the focus. If the image extends beyond the screen, and condensation has accumulated on the lens, leave the projector on for about two hours to clear it.
C
carriesolisAug 29, 2025
How to adjust color balance on Sony VPL-CX21 Projector?
- E
  Emily JohnsonAug 29, 2025
  If the color balance is incorrect on your Sony Projector, adjust the picture settings. Also, ensure the 'Color System' setting in the Setup menu matches the color system being input.
A
Anthony JordanAug 31, 2025
What does it mean if TEMP/FAN indicator lights up on Sony Projector?
- R
  Robert Robinson MDAug 31, 2025
  If the TEMP/FAN indicator on your Sony Projector lights up, check that nothing is blocking the ventilation holes. If you're using the projector at a high altitude, make sure 'High Altitude Mode' in the Installation menu is set to 'On.'
D
Dominic ColonSep 1, 2025
How to stop picture flickering on Sony VPL-CX21?
- R
  ruizjohnSep 2, 2025
  If your Sony Projector's picture flickers, adjust 'Dot Phase' in the Adjust Signal... menu of the Signal menu.
M
Matthew SmithSep 3, 2025
What to do if LAMP/COVER indicator lights up on Sony VPL-CX21?
- B
  Brenda HallSep 3, 2025
  If the LAMP/COVER indicator lights up on your Sony Projector, it could mean the lamp has reached the end of its life and needs replacing. It could also mean the lamp has reached a high temperature; in this case, wait 45 seconds to cool the lamp before turning the power on again.
M
melaniejacksonSep 5, 2025
Why is there no sound on my Sony VPL-CX21?
- M
  Mr. Brian GoodSep 5, 2025
  If your Sony Projector has no sound, check that all audio cables are properly connected. Ensure you are using the correct A/V connecting adaptor. Also, check and adjust the volume in the Picture menu.

Sony VPL-CX21 Specifications

General

Heat dissipation	750.7 BTU/h
Projection technology	LCD
Projector native resolution	XGA (1024x768)
Lamp power	165 W
Light source type	Lamp
Service life of light source	2000 h
Number of built-in speakers	1
I/O ports	-RGB/Component: HD D-sub 15 pin x 1 -S-Video: Mini DIN 4 pin x 1; -Composite: RCA pin jack x 1; -Audio: RCA pin jack x 2 (L/R);
Dimensions (WxDxH)	273 x 52 x 210 mm
Power requirements	AC 100 - 240 V, 50/60 Hz
Power consumption (standby)	0.8 W
Power consumption (typical)	220 W
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 35 °C
Storage relative humidity (H-H)	10 - 90 %
Operating relative humidity (H-H)	35 - 85 %
Product type	Standard throw projector