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Where is/are the ballast located for the two flourecent lamps in the front of the GDM-33C please? I suspect this is the root cause, any tips appreciated.
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front panel at top - 2 starters, one for top panel, one for internal lights. early cocacola models had them inside the bottom panel on the right, and some later models had electronic ballasts (no starters) in the centre under the bottom of the fridge.
The ballast is located down by the compressor if you take off the cover the ventilation slats. Then in the very center where there is a plug from the compressor plugged into the side of the center support as a cover on the front of that open the cover and inside you'll find The ballast.
Check the lamp ballast, it works just like a flourecent light if the ballast is bad it will turn the light off. It comes on a board try searchinng ......ebay or thetvdoctor.comXHRWN5
The ballast is located on the bottom inside wall where the compressor is located. Its usaually mounted, and can be easily removed and replaced. The ballast is rectangular in shape and has a few wires protruding from each end. To replace simply dismount the bad ballast and clip the wires. Match the ballast to a new one, reattach the wires using wire nuts, and remount ballast.
The dimmer you purchase needs to be compatable with the ballasts of the C.F. light. A compact flourescent potlight has a ballast, if your replacing incandescent bulbs with compact flourecent lamps
you still need a flourescent dimmer. Remember a ballast is like a transformer! If you compact flourecent fixture has a ballast by Lutron. then you need a lutron dimmer as there ballasts are not officially compatable with other dimmers, allthough I've seen them work. My advise is buy Pass & Seymour (Legrand) or Leviton.
Good Day; I would suspect the ballast, but try these first:
Causes:
Cause #1
1. (Lamp may light and go out) suspect bad lamp part # 915P020010 2. Check for 12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check for an open F9A09 on the Power PCB, if it is open replace F9A09 part # 283P127060 and the Light Engine part # 939P977010 3. (Lamp may light and go out) Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if low or missing check C9A37 and C9A38 both 3300 UFD 10 V part # 181P732040 on the Power PCB (part # 930B921002) 4. At power on the lamp turns on and off three times and then the unit shuts down with a red lamp LED (lamp error). Replace the Light Engine part # 939P977010 5. Lamp enable line at J14 pin 6 does not switch to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 6. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on and does go to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Lamp Power PCB (ballast) part # 939P978010 7. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010. Good Luck, big IRISH.
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.
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