BenQ Projector TH670 User Manual

Maintenance 61
Lamp information
Getting to know the lamp hour
When the projector is in operation, the duration (in hours) of lamp usage is 
automatically calculated by the built-in timer. The method of calculating the equivalent 
lamp hour is as follows:
Total (equivalent) lamp hour
= 1 (hours used in Economic mode) + 4/3 (hours used in normal mode)
See Setting Lamp Power below for more information on Economic mode.
The lamp hour in Economic mode is calculated as 3/4 of that in Normal mode. That is,...

Maintenance
62
Setting Auto Power Off
This function allows the projector to turn off automatically if no input source is 
detected after a set period of time to prevent unnecessary waste of lamp life.
To  s e t  Auto Power Off, go to the 
Advanced menu > System Setup: Basic > 
Auto Power Off menu and press  / . The time period can be set from 5 to 30 
minutes in 5-minute increments. If the preset time lengths are not suitable for your 
presentation, select Disable. The projector will not automatically...

Maintenance 63
Timing of replacing the lamp
When the Lamp indicator lights up red or a message appears suggesting it is time to 
replace the lamp, please install a new lamp or consult your dealer. An old lamp may 
cause a malfunction in the projector and in some instances the lamp may explode.
The Lamp indicator light and Temperature warning light will light up if the lamp 
becomes too hot. See Indicators on page 67 for details.
The following lamp warning displays will remind you to change the lamp.
The...

Maintenance
64
Replacing the lamp (FOR SERVICE PERSONNEL 
ONLY)
• Hg - Lamp contains mercury. Manage in accordance with local 
disposal laws. See www.lamprecycle.org.
• If lamp replacement is performed while the projector is suspended 
upside-down from the ceiling, make sure that no one is underneath the 
lamp socket to avoid any possible injury or damage to the human eyes 
caused by fractured lamp.
• To reduce the risk of electrical shock, always turn the projector off and 
disconnect the power cord...

Maintenance 65 3. Remove the lamp cover by (a) 
pushing the lamp cover upward and 
(b) lifting it off.
• Do not turn the power on with 
the lamp cover removed.
• Do not insert your fingers 
between the lamp and the 
projector. The sharp edges inside 
the projector may cause injuries.
4. Loosen the screws that secure the 
lamp.
5. Lift the handle so that it stands up. 
Use the handle to slowly pull the 
lamp out of the projector.
• Pulling it too quickly may cause 
the lamp to break and scatter 
broken...

Maintenance
6611. Restart the projector.
Do not turn the power on with the lamp cover removed.
Resetting the lamp timer
12. After the startup logo, open the On-
Screen Display (OSD) menu. Go to the 
Advanced menu > System Setup: 
Advanced > Lamp Settings > Reset 
Lamp Timer menu and press OK on 
the projector or remote control. A 
warning message displays asking if you want to reset the lamp timer. Select 
Reset and press OK on the projector or remote control. The lamp time will be 
reset to 0.
Do not...

Maintenance 67
Indicators
LightStatus & DescriptionPOWERTEMPLAMP1LAMP2
Pow e r  eve n t s
Orange Off Off Off
Stand-by
Green
FlashingOff Off OffPowering up
Green Off Off OffNormal operation
Orange
FlashingOff Off OffNormal power-down cooling
Red 
FlashingRed 
FlashingRed 
FlashingOffDownload
Green Off Red OffCW start fail
Red 
FlashingOff Off OffScaler shutdown fail (data abord)
Red Off Red OffScaler reset fail (video projector only)
Burn-in message
Green Off Off
Burn-in ON
Green Green GreenBurn-in OFF...

Maintenance
68
Green
FlashingGreen
FlashingOff OffThermal IC #2 I2C Connection error 

Troubleshooting 69
Troubleshooting
The projector does not turn on.
No picture
Blurred image
Remote control does not work
The password is incorrect
CauseRemedy
There is no power from the power 
cable.Plug the power cord into the AC inlet on the 
projector, and plug the power cord into the 
power outlet. If the power outlet has a 
switch, make sure that it is switched on.
Attempting to turn the projector on 
again during the cooling process.Wait until the cooling down process has 
completed.
CauseRemedy...

Specifications
70
Specifications
All specifications are subject to change without notice.
Lamp life results will vary depending on environmental conditions and usage.
Optical
Resolution
1920x1080, 1080p
Display system
1-CHIP DMD
Lens F/Number
F= 2.55~2.79
f= 22.3mm~26.76mm
Offset
116%
Zoom ratio1.2X
Lamp
210W
Electrical
Power supply
AC100–240V, 2.90 A,
50-60 Hz (Automatic)
Power consumption
270 W (Max.); < 0.5 W (Standby) 
Mechanical
We i g h t
3.0 kg (6.6 lbs.)
Output terminals
Speaker
(Stereo) 10 watt...