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ELECTRONICS CORNER
My Repair Jobs
General information
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Job Number |
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0101-17 |
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Equipment type |
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Telephone |
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Maker + Model # |
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Omega |
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Made in |
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? |
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Comments |
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Phone was pulled violently from Line chord. |
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Symptoms observed
BAD |
1 |
No Line tone |
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2 |
Talk LED (when hand set
is lifted) is always off. |
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GOOD |
1 |
LCD Display and most of
digital system is OK. |
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Repair notes
Full repair description and observations |
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1 |
On opening the
telephone, it was noted that there was space for 3 batteries, but only one
was used as there were no battery connections for the other two |
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2 |
On inspecting the
circuit, no faults were found. |
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3 |
Before inspecting for
more difficult faults, the line wire was replaced with another one and the
telephone worked perfectly. |
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4 |
The cable was checked
and found that it was open circuit. It was replaced. |
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Repair summary |
LINE CABLE OPEN CIRCUIT |
Other measurements and technical comments
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1 |
The voltage of the power
supply from the telephone line is 50V. When offline, the voltage after the
hang-on switch is 50V, while it becomes about 7.8V when the phone is raised
(i.e. when on-line). |
