1-22 (No.YA422)
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
I2C communication.
IC101
,
IC102
,
IC381
,
IC601
,
IC606
,
TU3001
[ANALOG PWB]
SDA
If it checks whenever I2C
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
I2C communication.
IC6401
[DIGITAL PWB]
SDA
If it checks whenever I2C
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.
