Panasonic KX-FC235G-S Service Manual ▷ View online
7.7.9.2. Troubleshooting Flow Chart
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7.7.9.3. Broken Parts Repair Details
(D101, D102, D103, D104)
Check for a short-circuit in terminal 4. If D101, D102, D103 and D104 are short-circuits, F101 will melt (open).
In this case, replace all of the parts (D101, D102, D103, D104, F101).
Check for a short-circuit in terminal 4. If D101, D102, D103 and D104 are short-circuits, F101 will melt (open).
In this case, replace all of the parts (D101, D102, D103, D104, F101).
(Q101)
The worst case of Q101 is a short-circuit between the Drain and Gate because damage expands to the peripheral circuit of Q101.
This is due to a very high voltage through the Gate circuit which is composed of R128, R109, D106 and IC101.
You should change all of the parts listed as follows.
F101, Q101, R128, R109, D106, IC101
The worst case of Q101 is a short-circuit between the Drain and Gate because damage expands to the peripheral circuit of Q101.
This is due to a very high voltage through the Gate circuit which is composed of R128, R109, D106 and IC101.
You should change all of the parts listed as follows.
F101, Q101, R128, R109, D106, IC101
(D201)
If D201 is broken, the oscillation circuit in the power supply cannot operate. Check it with an electric tester.
If D201 is broken, the oscillation circuit in the power supply cannot operate. Check it with an electric tester.
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7.7.10. Operation Panel Section
7.7.10.1. No Key Operation
CROSS REFERENCE:
TEST FUNCTIONS(P.60)
7.7.10.2. No LCD Indication
CROSS REFERENCE:
TEST FUNCTIONS(P.60)
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7.7.11. Sensor Section
Refer to SENSORS AND SWITCHES(P.169) for the circuit descriptions.
The Test Function makes the sensor circuit check easier. (Refer to TEST FUNCTIONS(P.60).)
For example, as for "FILM END/COVER OPEN SENSOR", "CO" is turned ON/OFF on the display when you open or close the
cover. Also, document sensor, read position sensor, recording paper sensor are turned ON/OFF by the copy operation. Therefore,
each sensor can be checked for proper mechanical operation.
As for the electric check, check whether each voltage is right or not with following flowchart turning each sensor lever ON/OFF
manually.
Refer to Error Message (Display) (P.4) for display message.
The Test Function makes the sensor circuit check easier. (Refer to TEST FUNCTIONS(P.60).)
For example, as for "FILM END/COVER OPEN SENSOR", "CO" is turned ON/OFF on the display when you open or close the
cover. Also, document sensor, read position sensor, recording paper sensor are turned ON/OFF by the copy operation. Therefore,
each sensor can be checked for proper mechanical operation.
As for the electric check, check whether each voltage is right or not with following flowchart turning each sensor lever ON/OFF
manually.
Refer to Error Message (Display) (P.4) for display message.
7.7.11.1. Check the Document Top SW (SW351)................."REMOVE DOCUMENT"
7.7.11.2. Check the Document Set Sensor (PS301)................."CHECK DOCUMENT"
7.7.11.3. Check the Cover Open and the Film End SW (SW501)................."COVER OPEN "
or "CHECK FILM"
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