JVC PD-Z35DV4 Service Manual page 41

5.1.6 DETAILS
Self- check is performed for the following items.
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Item
Detection item
name
Low bias line short LOB
protection
Fan lock FAN
Presence of sync SYNC
signal
AC power input TIM
Main CPU MSM
communication
Digital tuner DIGI
Main memory MEM
AV select AVSW
3 dimensions YC YC
separation
Multi sound AIO
process
RF tuner TUN
Ghost reduction GCR
DIST process IP
RGB process RGB
DVI (Digital DVI
communication)
Digital input HDMI
Detection content
Confirm the operation of the low bais
(2.5V / 3.3V / 5V / 9V) protection circuit.
Q9822 [REGULATOR PWB]
Not used.
Confirmation of presence of video
sync signal.
M : Main sync signal
S : Sub sync signal
HD : Component sync signal
IC201 [ANALOG SIGNAL PWB]
Not used.
Confirmation of ACK (response)
signal which uses sync
communications with chassis CPU.
IC7501 [DIGITAL SIGNAL PWB]
Not used.
Confirmation of reply of ACK signal
which uses I C communication.
2
IC7602 [DIGITAL SIGNAL PWB]
Same as above.
IC301, IC501
[ANALOG SIGNAL PWB]
Same as above.
IC1001 [DIGITAL SIGNAL PWB]
Same as above.
IC3501 [RECEIVER PWB]
Same as above.
IC3001 [RECEIVER PWB]
Not used.
Confirmation of reply of ACK signal
which uses I C communication.
2
IC3001 [DIGITAL SIGNAL PWB]
Same as above.
IC4001 [DIGITAL SIGNAL PWB]
Not used.
Not used.
Detection
signal (line)
LB_PRO Detection starts 3 seconds after the power is
turned on.
If error continues between 400ms, the power
is turned off.
--- Not used.
SDA Confirmation of presence of sync signal in
video signal.
--- Not used.
WAKE If it checks whenever sync communication with
SHM performed , and no reply of ACK signal,
an error will be counted.
--- Not used.
SDA If it checks whenever I
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 Same as above.
--- Not used.
SDA If it checks whenever I
performed, and no reply of ACK signal, an error
will be counted.
SDA Same as above.
--- Not used.
--- Not used.
Detection timing
C communication is
2
2 C communication is
(No.YA101) 1-41