(No.YA665<Rev.001>)1-21
5.1.6 DETAILS
Self check is performed for the following items: (---- is not used 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 bias protection
circuit.
IC9401
,
Q9401
,
Q9601
,
Q9703
[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
----
----
----
----
AUD
----
----
----
Devices on the ANALOG
PWB
ANA
Confirmation of reply of ACK signal which uses
I
2
C communication.
IC101
,
IC102
,
IC601
,
IC3501
,
TU3001
[ANALOG PWB]
SDA
Detection starts 3 seconds after
the power is turned on. 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.
IC5001
[DIGITAL PWB]
SDA
Detection starts 3 seconds after
the power is turned on. 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
----
TMP
----
----
----
----
L1
----
----
----
----
L2
----
----
----
----
DDT
----
----
----
----
FAN
----
----
----
----
LC
----
----
----
----
IRS
----
----
----
Type of error
POWER LED flash cycle
Low bias line short protection
POWER LED turnig on and off at 1 second intervals.
