Chapter 5 TROUBLESHOOTING
5.1 Troubleshooting List
For qualified personnel only
The troubleshooting list below gives common symptoms of equipment malfunction and means to restore normal operation. If you cannot restore normal operation, please do not check inside any unit. Any repair is best left to a qualified radiotelephone technician. Improper handling or adjustment may cause more serious damage.
Troubleshooting list
TROUBLE | PROBABLE CAUSE | REMEDY |
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Power can not be turned on | The mains switchboard may be | Turn on the mains switch. |
| off. |
|
| DC overvoltage input. | Check supply voltage. It should |
| The battery may have | be less than 31.2V |
| Recharge battery and tighten | |
| discharged, or poor contact at | terminal connections. |
| terminals. |
|
| Check fuse on the power cable | Replace the blown fuses. |
| or Power Supply Unit. |
|
|
|
|
Frequency readout appears | The [DIMMER] key may be | Operate the [DIMMER] key. |
but no lamps light | off. |
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|
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|
Power is on but no sound | The [SPEAKER] key is off. | Press the [SPEAKER] key. |
from loudspeaker | Volume may be too low. | Adjust the VOLUME control. |
| ||
| Squelch is on. | Press the [SQ] key if "SQ" |
|
| appears on the display. |
| Reduced RF Gain. | Turn the RF Gain control |
|
| clockwise. |
|
|
|
Poor articulation | Wrong class of emission may | Select class of emission same as |
| be in use. (For example, | that of incoming signal. |
| receiving signal in J3E mode. |
|
| J3E should be used only on |
|
| 2182 kHz.) | In Custom or ITU channel |
|
| |
| Receiver detuned. | mode, press the [CLARIFY] |
|
| key then fine tune frequency by |
|
| the FREQ/CH control. |
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|
|
Output power is reduced to | Power is automatically reduced | Wait until the unit returns to |
low ("LOW" indication | to protect against overheating | normal condition. |
blinks) | due to continuous transmission. |
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