(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.
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