(No.YA462)1-21
5.1.6 DETAILS
Self check is performed for the following items:
< Page 1 of screen >
< Page 2 of screen >
5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT
In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.
< Explanation of operation >
If error is detected, the power is turned off.
Shortly after a power is turned off, POWER LED will be blinked.
Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.
Detection item Display Detection content
Diagnosis
signal (line)
Detection timing
Low bias line short
protection
LOB Confirm the operation of the low bais (16V / 5V /
LCD5V / 3.3V / 1.2V) protection circuit.
Q9601
, Q9651[DC-DC PWB]
LB_PRO Detection starts 3 seconds after
the power is turned on. If error
continues between 200 ms the
power is turned off.
Fan lock FAN Not used ---- ----
Abnormal rise of
temperature in audio
circuit
AUD Confirmation of the temperature of audio circuit.
TH6401
[D-AMP PWB]
---- Detection starts 3 seconds after
the power is turned on.
If the temperture of 90°C is
detected for 3 seconds the power
is turned off.
Devices on the ANALOG
PWB
ANA Confirmation of reply of ACK signal which uses
I
2
C communication.
IC101, IC102, IC381, IC601, IC606, TU3001
[ANALOG PWB]
SDA If it checks whenever I
2
C
communication is performed and
no reply of ACK signal an error
will be counted.
Devices on the DIGITAL
PWB
DIG Confirmation of reply of ACK signal which uses
I
2
C communication.
IC6401 [DIGITAL PWB]
SDA If it checks whenever I
2
C
communication is performed and
no reply of ACK signal an error
will be counted.
Detection item Display Detection content
Diagnosis
signal (line)
Detection timing
Temp. sensor TEM Not used ---- ----
Lamp does not light up L1 Not used ---- ----
Lamp goes out L2 Not used ---- ----
Abnormal DD CPU
circuit
DDT Not used ---- ----
Fan lock FAN Not used ---- ----
Lamp cover open LC Not used ---- ----
Abnormal of optical iris IRS Not used ---- ----
Type of error POWER LED flash cycle
Low bias line short protection Blue turnig on and off at 1 second intervals.
Abnormal rise of temperature in audio circuit Blue turnig on and off at 0.5 second intervals.
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