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Lamp driver arcs lamp doesn't light - ViewSonic PJ1172 Multimedia Projector

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Picture is getting dark.


Try changing the lamp, some times as they age the electrodes in the arc lamp evaporate and depositing inside the arc tube, causing it to darken, if the lamp is clear there is a good change that the light tunnel is broken or has other problems with the light engine

Jul 05, 2014 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Replaced lamp in my samsung DLP HLS 5687W TV. New Lamp when turned on only shows a high voltage arc in the tube. Never ignites. The old lamp has a purple glow when put back in appearing that the gas in...


My experience,never require to taps any projection lamps before,wouldn't hurt u have the lamp right there try as the ventor said.My opinion,the lamp is dead.Mercury inside devices,are a solid stablize liquids.

Jun 24, 2010 | Televison & Video

2 Answers

SANYO PRO xtrax MULTIVERSE PROJECTOR


Likely the projector has seem some hours on it before being sold second hand to you. A worn out metal arc lamp will wink out like this when it is at END OF LIFE. As the lamp operates, pressures build from high voltage arc current passing through the pressurized bulb. More and more voltage is required to keep the arc struck and operating as temperature rises. As the bulb ages, it requires more power to maintain the arc in the glass envelope bulb. It can rise to a point where it overruns the ability for the power supply in the projector to safely maintain the arc and it winks off, only the fan is left running. When the unit cools, the arc re-strikes and illuminates the lamp.

In short - replace the bulb, but buy TWO of them. One to fix the projector, the other as a spare on hand while awaiting another replacement bulb down the road. These metal-arc lamps typically run anywhere from 50 to 100 hours depending on power supply design and cooling ability of the projector as a whole.

May 10, 2010 | Sanyo PLC XU35 Multimedia Projector

1 Answer

Samsung DLP HL-R5667W lamp won't fire. Changed lamp & ballast and still won't work. Fans are working fine, color wheel good. Lamp door switch good. When I power on, I hear ballast buzz like it's trying...


Was the replacement lamp the same part number as the original as there are different arc gaps for different lamps and the wrong arc gap will cause the lamp not to light. Since the ballast is powering up the lamp should light if the baalast is matched to the correct arc gap of the lamp being used.

Nov 27, 2009 | Samsung HLR5667W 56" Rear Projection HDTV

1 Answer

Optoma hd65 wont power on


The problem sounds like the lamp ballast is bad--it's a circuit that initially starts the lamp and then keeps it burning--the lamps are like a welder's arc inside of a glass globe. When you push the power button, the ballast uses a spark of electricity (sort of like a spark plug) to get the initial arc going and then switches to low voltage, but HIGH amps to keep it going.---Rick

Sep 06, 2009 | Optoma HD65 DLP Projector

1 Answer

Dont know what the difference is between lamps


these are Panasonic arc lamps .. the numbers 100-120 indicates the intended voltage range of operation .. the /1.3 or /1.4 is the current in amps .. so the 1.4 is slightly higher current and likely a bit brighter .. thats 156 watts vs. 168 watts .. arc lamps are much more efficient than incandescent so 150 watts in an arc lamp is a lot more light than a 150 watt incandescent...

Sep 04, 2009 | Mitsubishi WD-65000 65" Rear Projection...

1 Answer

Lamp Issue with Mitsubishi WD-62725


Hi I am Vortash it sounds as if the actual fault is in your ballast circuit this is the circuit that fires up the arc on the lamp and sends the signal to the main board that the lamp is running , if this is faulty no signal is received by the board and the lamp light comes on when this happens there is usually still sound but not always as sometimes the problem affects the power supply also .. this is a job for a trained engineer as voltages at the ballast are sometimes in excess of 25000 volts at first arc that then settles to a lower voltage to run ... regards Vortash

May 30, 2009 | Mitsubishi WD-62725 62" Rear Projection...

1 Answer

PT-50LC13 Lamp issue


i hope the lamp was panasonic or bought in a good place (average cost of this lamp is 250 dllrs)
if the lamp is trustfully. i would put attention in the back side when you listen the arcing that the lamp at least try flashing.

This moment of the repair where you are is critical because you arrive to conclusions according to the process you already did and suspect that what it is already done is fine (but is really true that lamp works plus is really true that the arcing is because the arcing devise arcs or is only the primary of the transformers in the ballast who holds 300 volts in the primary (really good voltage to make arcing sound too)
Now the error code is going to be 50 % good or not: i mean or gives you the error of the ballast and lamp or any voltage is missed in the power supply ( i don't have the error codes chart for you with me) because i would like to go far and the problem was in the same place where i started/

Apr 08, 2009 | Panasonic PT-50LC13 50" Rear Projection...

1 Answer

STANDBY LIGHT TURN ON


when turning on the set will go three startup cycles about 2-3 min. then all three leds will blink/ possible causes /lamp/ballast/dmd board check or purchase the dmd board last (costs) also listen for arcing from the ballest at startup and fan noise if you can and color wheel noise also.if you hear the ballast arcing and trying to fire the lamp look at the lamp.

Jun 15, 2008 | Samsung DLP HL-P5663W 56" TV

1 Answer

Hd50lpw175x7


Ballast Verification Process
1. Short out door switch (SP001)
2. Apply AC power and wait till DM module boots
3. Press power switch and observe spark gap on ballast
4. If spark gap arcs, suspect Lamp. If color wheel starts but ballast won’t strike
lamp, go to next step.
5. Measure BP252 on AC IN CBA for +300Vdc. If missing check door switch, cable
from AC IN CBA to switch and AC IN PCB. If correct go to next step.
6. Monitor pin 2 of BT251 for Ballast ON command from Light Engine. If present
suspect Ballast. If missing suspect Light Engine. Pin 5 of BT251 starts at 3.3V
after power switch is pressed and drops to .18V when the Light Engine sends the
start command. No change on pin 5 indicates Light Engine is suspect, change
on pin 5 with no ballast start, ballast is suspect.

Note: Lamp may arc but not start. Pin 5 of BT251 is "LAMP LIT" and goes to 1.48V
when lamp is lit. If ballast strikes lamp but lamp won’t stay lit, suspect Lamp.

Jun 09, 2008 | RCA HDLP50W151 50" Rear Projection HDTV

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