JVC HD-56FH97 Service Manual page 33

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 and the TUNER
PWB
Devices on the DIGITAL PWB DIG
< Page 2 of screen >
Detection item Display
Temp. sensor TMP
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
Detection content
Detection of the low bias line(5V/9V/12V) short.
Q9821, Q9831, Q9861 [POWER PWB]
Not used
Not used
Confirmation of reply of ACK signal which uses
2
I C communication.
IC101, IC102, IC281, IC381, IC601,
IC061,TU001 [TUNER PWB]
Not used
Detection content
Confirmation of the abnormal inner cabinet
temperature. (53 C)
IC2001 [THERMO PWB]
Confirm that the lamp dose not light up.
CNBCT1 [DRIVE PWB]
Confirm that the lamp dose not goes out.
CNBCT1 [DRIVE PWB]
Confirmation of the serial communication error
between DRIVE PWB and DIGITAL PWB.
IC3701 [DRIVE PWB]
Confirmation of the lock signals outputting the
operation(circuit) status of the cooling fan.
IC8005 [DRIVE PWB]
Confirmation of the interlock switch status for the
lamp cover.
S0861 [LAMP COVER SW PWB]
Confirmation of the abnormal optical iris
operation.
IC5005 [IRIS PWB]
Diagnosis
signal (line)
LB_PRO
----
----
SDA
IC606 [ANALOG PWB]
----
Diagnosis
signal (line)
TXD
TXD
TXD
TXD
TXD
TXD
TXD
Detection timing
Detection starts 3 seconds after
the power is turned on. If error
continues between 1000ms the
power is turned off.
----
----
If it checks whenever
communication is performed and
no reply of ACK signal an error
will be counted.
----
Detection timing
It will count if the serial
communication from a
MICOM is always supervised and
an error occurs.
It will count if the serial
communication from a
MICOM is always supervised and
an error occurs.
It will count if the serial
communication from a
MICOM is always supervised and
an error occurs.
It will count if the serial
communication error is error
occurs.
It will count if the serial
communication from a
MICOM is always supervised and
an error occurs.
It will count if the serial
communication from a
MICOM is always supervised and
an error occurs.
It will count if the serial
communication from a
MICOM is always supervised and
an error occurs.
(No.YA409)1-33
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I C
DD
DD
DD
DD
DD
DD