Read Sony KV-T25SN81 Service Manual online
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KV-T25SN81
RM-870
SELF DIAGNOSIS FUNCTION
If no acknowledgement is returned from a device which is turned "ON", the device has a problem.
In this case, one of the LED's responding to the problem device will flicker a defined number of times.
Flickering is operated by lighting the LED's for 60ss each time.
The flickering frequency responding to each failed device is shown below.
All the devices are checked one after another from the left of the table.
If an error is found, the responding LED will start flickering.
So, if more than 1 device have failed, only the one on the left side will flicker.
Device
Flickering
Frequency
NONVOLATILE
MEMORY
1
—
—
Y/C JUNGLE
(IC300)
3
—
—
—
—
TONE
CONTROL
(IC201)
6
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