JVC LT-40FH96 Service Manual page 23

5.1.6 DETAILS
Self check is performed for the following items:
< Page 1 of screen >
Detection item Display
Low bias line short LOB
protection
Fan lock FAN
Audio AUD
Devices on the ANALOG ANA
PWB
Devices on the DIGITAL DIG
PWB
< Page 2 of screen >
Detection item Display
Temp. sensor TEM
Lamp does not light up L1
Lamp goes out L2
Abnormal DD CPU DDT
circuit
Fan lock FAN
Lamp cover open LC
Abnormal of optical iris IRS
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.
Type of error
Low bias line short protection
MAIN CPU error detection
ATSC TUNER error detection
< 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 content
Confirm the operation of the low bais (16V / 5V /
LCD5V / 3.3V / 1.2V) protection circuit.
Q9601, Q9651[POWER PWB]
Not used
Not used
Confirmation of reply of ACK signal which uses
I2C communication.
IC101, IC102, IC281, IC381, IC601, IC606,
IC061, TU001 [ANALOG PWB]
Confirmation of reply of ACK signal which uses
I2C communication.
IC6401, IC8831 [DIGITAL PWB]
Detection content
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Low luminance blue turnig on and off at 1 second intervals.
Low luminance blue turnig on and off at 2 second intervals.
Low luminance blue turnig on and off at 2 second intervals.
Diagnosis
signal (line)
LB_PRO Detection starts 3 seconds after
the power is turned on. If error
continues between 200 ms the
power is turned off.
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SDA If it
communication is performed and
no reply of ACK signal an error
will be counted.
SDA If it
communication is performed and
no reply of ACK signal an error
will be counted.
Diagnosis
signal (line)
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POWER LED flash cycle
Detection timing
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checks whenever I2C
checks whenever I2C
Detection timing
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(No.YA363)1-23