(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.
