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Adjustments and Repair tips 3.9
Heat regulation
In heat regulation, the temperature sensors on the screen and chassis are tested,
and the fan are tested to ensure they are working. The sensors and fan are
connected using plugs that can fail or that the assembler can forget to attach.
If the test detects that a screen or chassis sensor is disconnected or short-circuited,
the status display shows “SENSOR ERROR” for approximately 2 minutes. This
happens only once, and lasts until the power is disconnected from the device.
If the test detects that the fan are not running (no tacho pulser), the status display
shows “FAN ERROR” for approximately 2 minutes. This happens only once, and
lasts until the power is disconnected from the device.
Final check after repair
The final check after repair, describes the activities that are needed to ensure the
product will be returned in perfect condition to the customer.
The contents is:
-
AC leakage test.
-
Check product information.
-
Restore the setup and check connections, picture and sound.
-
Final cleaning of the product.
-
PIN-code setting.
Insulation test
Each set must be insulation tested after having been dismantled. Make the test
when the set has been reassembled and is ready to be returned to the customer.
Flashovers must not occur during the testing procedure!
Make the insulation test as follows:
Short-circuit the two pins of the mains plug and connect them to one of the
terminals of the insulation tester. Connect the other terminal to ground on the
aerial socket.
NOTE!
To avoid damaging the set it is essential that both terminals of the insulation tester
have good contact.
Slowly turn the voltage control of the insulation tester until a voltage of .5 kV
and max. 0mA is obtained. Maintain that voltage for one second, then slowly
turn it down again.
Monitor information
The scope of this check is, to ensure the following:
-
The product has maintained the correct identity.
-
Is set to correct option.
-
The error code register is cleared.
Procedure
. Enter Service menu – monitor service menu – monitor information
2. check the serial number is correct
3. check option setting is correct
4. clear the error code
5. select error code and press
GO
ABO-CENTER
v/HENRIKSENS
ELEKTRONIK