JVC DynaPix LT-26DR7SJ, Руководство по обслуживанию

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(No.YA408)1-25
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 bias (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 , TU3002
[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 Red turnig on and off at 1 second intervals.
Abnormal rise of temperature in audio circuit Green turnig on and off at 0.5 second intervals.