JVC PD-Z50DX4/S Service Manual page 30

5.1.6 DETAILS
Self check is performed for the following items:
< Page 1 of screen (RECEIVER UNIT) >
Detection item Display
Low bias line short
protection
Fan lock
Presence of sync signal SYNC Confirmation of presence of video
AC power input
Main CPU MSM
communication
Digital tuner
Main memory MEM
AV select switch AVSW Same as above.
3 dimensions YC
separator
Multi sound process
RF tuner
Ghost reduction
DIST process
RGB process
DVI (Digital communication)
Digital input HDMI
1-30 (No.YA229)
Detection content
LOB Confirmation of operation of the low bais
(2.5V / 3.3V / 5V / 9V) protection circuit.
Q9822 [REGULATOR PWB]
FAN Not used.
sync signal.
M : Main sync signal
S : Sub sync signal
HD : Component sync signal
IC201 [ANALOG SIGNAL PWB]
TIM Not used.
Confirmation of ACK (response)
signal which uses sync communications
with Chassis CPU.
IC7501 [DIGITAL SIGNAL PWB]
DIGI Not used.
Confirmation of reply of ACK signal
2
which uses I C communication.
IC7602 [DIGITAL SIGNAL PWB]
IC301, IC501 [ANALOG SIGNAL PWB]
YC Same as above.
IC1001 [DIGITAL SIGNAL PWB]
AIO Same as above.
IC3501 [RECEIVER PWB]
TUN Confirmation of reply of ACK signal
2
which uses I C communication.
TU3001 [RECEIVER PWB]
GCR Not used.
IP Confirmation of reply of ACK signal
2
which uses I C communication.
IC3001 [DIGITAL SIGNAL PWB]
RGB Confirmation of reply of ACK signal
2
which uses I C communication.
IC4001 [DIGITAL SIGNAL PWB]
DVI Same as above.
IC6101 [DIGITAL SIGNAL PWB]
Confirmation of reply of ACK signal
2
which uses I C communication.
IC8001 [DIGITAL SIGNAL PWB]
Diagnosis
Detection timing
signal (line)
LB_PRO Detection starts 3 seconds after the
power is turned on.
If error continues between 400ms the
power is turned off.
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SDA Confirmation of presence of sync signal
in video signal.
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WAKE If it checks whenever sync communication
with Chassis CPUperformed and no reply
of ACK signal an error will be counted.
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SDA If it checks whenever I
is performed and no reply of ACK signal
an error will be counted.
SDA Same as above.
SDA Same as above.
SDA Same as above.
SDA If it checks whenever I
is performed and no reply of ACK signal
an error will be counted.
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SDA If it checks whenever I
is performed and no reply of ACK signal
an error will be counted.
SDA If it checks whenever I
is performed and no reply of ACK signal
an error will be counted.
SDA Same as above.
SDA Same as above.
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2
C communication
2
C communication
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2
C communication
2
C communication