Self Diagnosis Function; Summary Of Self-Diagnosis Function; Diagnosis Items And Prediction Of Malfunction Location - Sony KDX-46Q005 Service Manual

1-1. SUMMARY OF SELF-DIAGNOSIS FUNCTION

1. This device includes a self-diagnosis function.
2. In case of abnormalities, the POWER/STANDBY indicator automatically blinks.
It is possible to predict the abnormality location by the number of blinks.
The instruction manual describes blinking of the POWER/STANDBY indicator.
3. If the symptom is not reproduced sometimes in case of a malfunction, there is recording of whether a malfunction was generated or
not.
Operate the remote command to confirm the matter on the screen and to predict the location of the abnormality.

1-2. DIAGNOSIS ITEMS AND PREDICTION OF MALFUNCTION LOCATION

1. When a malfunction occurs the POWER/STANDBY indicator only blinks for one of the following diagnosis items.
In case of two or more malfunctions, the item which first occurred blinks.
If the malfunctions occurred simultaneously, the item with the lower blink count blinks first.
2. The screen display displays the results regarding all the diagnosis items listed below.
•RECEIVER UNIT (MBD-Q005)
Number of
Diagnosis item LED (POWER/STANDBY)
blink times
BOX TEMP 2 times
+B OVP 3 times
FAN 4 times
LOWB ERR 6 times
D OVP 8 times
PNL ERR 9 times
SECTION 1

SELF DIAGNOSIS FUNCTION

Excessively high ambient temperature or overheat of BOX (due to dust, etc.).
Improper connection of inter-board connectors.
Fan (or fan stop due to dust or other causes).
• Main converter primary circuit.
• Secondary-side regulator circuit.
• PFC converter circuit.
• AC-RLY circuit, AC-RYL signal line.
• STBY circuit.
• THRU3.3V circuit.
• THRU3.3V, SW_5V, SW_3.3V, SW_2.5V line output (over voltage).
Panel unit.
Possible cause (faulty location)
KDX-46Q005 (UC) 1-1