261.
PG-13 EQUIPMENT TROUBLE CHART
See Section 254
|
| Trouble | Indication | Cause | Remedy |
| No Sound | | Volume control not set correctly. | Set volume control correctly. |
| M-G set not running. | Open in power supply line. | Check for open switches in the power supply line. replace any fuses which may be burned out. See figure 36. |
| Amplifier tubes and exciter lamps fail to light. Reading obtained on low voltage meter of M-G set. | Fuse blown in low voltage generator circuit. | Replace fuse and if it blows again, check for short on low voltage line. See section 248, and figure 36. |
| Amplifier tubes and exciter lamps light. Reading obtained on high voltage meter of the M-G set. | Fuse blown in high voltage generator circuit. | Replace fuse and if it blows again, replace the UX-250 tubes in the amplifier unit and again replace the fuse. See figure 36. |
| Amplifier tubes and exciter lamps light. Fuses of M-G set OK. | Defective UX-112A tube. | Replace all UX-112A tubes with tubes known to be good. |
| Low Volume | | Defective UX-112A tube. | Replace all UX-112A tubes. |
| One or more UX-250 tubes do not light. | Burned out UX-250 tube. | Replace burned out UX-250 tubes. |
| | Defective UX-250 tube. | Replace all UX-250 tubes. |
| Noise or Motor-Boating | | Loose connections. | Inspect all connections and tighten where necessary. |
| | Poor ground connections on projectors. | Clean and tighten connections. |
| | Defective "C" batteries. | Replace "C" batteries. |
| Hum | | Dirty commutators on generators. | Clean the commutators. See section 37. |
| Whistling Sound | | Defective or unmatched UX-250 tubes. | Replace the UX-250 tubes with matched tubes. |
| | Microphonic UX-112A tube. | Tap tubes lightly to determine which tube is defective, and replace defective tube. |
