DEBUG MODE-9
HDMI TROUBLESHOOT(3/3)
TX-SR876/SA876
HDMI no picture
or dropout
trouble
Check video
version
Old version
Version is not
displayed
Analog video
(V or S or Comp)
is output at
HDMI OUT ?
Up-conversion
from analog
video to HDMI
is NG
Display HDMI
DEBUG MODE
HDMI IN1 & IN2
no output
HDMI IN3 & IN4
no output
HDMI IN1,
IN2, IN3, IN4
all no output
One of IN1,
IN2,IN3,IN4
no output
Q8401 SII9134
is NG
Only HDMI OUT
SUB no output
Path from
Q8401/8451 to
HDMI OUT
terminal is NG
HDMI IN1 to
IN4 are
normally output
Check the
Information
on FL
Update to the
latest version
Q7001 MPU
is NG
U8001
VX-50 is NG
Interface of
U8001 and
Q7001 is NG
Q8151 AD8196
is NG
Path from
the terminal
to Q8101 or
Q8151 is NG
Q8501 SII9135
is NG
Check power
supply pin of
Q8401
HDMI OUT
terminal is NG
U8001
VX-50 is
NG
Path from
U8001 to
Q8401 is NG
Refer
DEBUG
MODE-5,6
According to
each remedy,
solve the
problems
Check the
power supply
pin of Q7001
Impossible to
replace
U8001
Check power
supply pin of
U8001
Impossible to
replace Q8151
Confirm waveform
is viewable by
oscilloscope
from the terminal
to Q8101 or Q8151
Confirm waveform
is viewable by
oscilloscope
from Q8401/8451
to the terminal
The HDMI
terminal is NG
Resolder the
pins of the parts
from the terminal
to Q8101 or
Q8151
Resolder the
pins of the
parts from
Q8401/8451
to the terminal
Check power
supply pin of
Q8501
Replace the
terminal
Replace
Q7001 MPU
Check RESET
pin #19
of Q7001.
It moves H -->
L --> H after
powered on.
Check POFF
& POFF2 pins
(#25 & #26)
of Q7001.
They must be
“high”
Check +3.3V
power supply
circuit
Change HDMI
Board
NAHDM-9114
Replace
HDMI Board
NAHDM-9114
Check power
supply circuit
for U8001
Check
the power
supply circuit
for Q8501
Check the
power supply
circuit for
Q8401
OK
NG
OK NG
Find out
bad part and
replace it
Find out
bad part and
replace it
Replace the
terminal
Check the
power supply
pin of Q8151
OK
Check the
power supply
pin of Q8101
OK
NGNG
Replace
HDMI Board
NAHDM-9114
Impossible to
replace Q8501
Replace
HDMI Board
NAHDM-9114
Confirm waveform
is viewable by
oscilloscope
from U8001 to
Q8401
Resolder the
pins of the
parts from
U8001 to
Q8401
Find out
bad part and
replace it
NOTE:
1. This trouble shooting map focuses on the HDMI hardware troubles.
For detailes, refer to TX-SR876 Block Diagrams and Schematic Diagrams.
2. Analysis written below is of typical cases. So, more detailed check may
need in actual cases.
3. Before replace ICs or pcb below, resolder the pins first to save resources.
No
Ye s
Latest version
Impossible to
replace
U8001
Check power
supply pin of
U8001
Change HDMI
Board
NAHDM-9114
Check the
power supply
circuit for
U8001
OK NG
Resolder
the pins of
the parts
from HDMI IN1
to Q8151
Confirm waveform
is viewable by
oscilloscope
from HDMI IN1
to Q8151
Find out
bad part and
replace it
Check
the power
supply circuit
HDMI HARDWARE TROUBLE
Q8101 AD8196
is NG
Impossible to
replace Q8101
Impossible to
replace Q8401
Q8451 SII9134
is NG
Check power
supply pin of
Q8451
Check the
power supply
circuit for
Q8451
Replace
HDMI Board
NAHDM-9114
Impossible to
replace Q8451
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