Hdmi Hardware Trouble - Onkyo TX-SR876 Service Manual

DEBUG MODE-9
HDMI TROUBLESHOOT(3/3)

HDMI HARDWARE TROUBLE

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.
Latest version
Check video
version
Version is not
Old version
displayed
Interface of
Update to the Q7001 MPU U8001
U8001 and
latest version is NG VX-50 is NG
Q7001 is NG
Check the Check power
Impossible to
power supply supply pin of
replace
pin of Q7001 U8001
U8001
OK NG
Change HDMI Check power
Check +3.3V Replace
Board supply circuit
power supply Q7001 MPU
NAHDM-9114 for U8001
circuit
Check POFF Check RESET Resolder
& POFF2 pins pin #19 the pins of
(#25 & #26) of Q7001. the parts
of Q7001. It moves H --> from HDMI IN1
They must be L --> H after to Q8151
"high" powered on.
Confirm waveform
is viewable by
oscilloscope
from HDMI IN1
to Q8151
HDMI no picture
or dropout
trouble
Analog video
No
(V or S or Comp)
is output at
HDMI OUT ?
Yes
HDMI IN3 & IN4 One of IN1,
HDMI IN1 & IN2
no output IN2,IN3,IN4
no output
no output
Q8151 AD8196 Q8101 AD8196 Path from
is NG is NG the terminal
to Q8101 or
Q8151 is NG
Check the
Check the
The HDMI
NG NG
power supply
power supply
terminal is NG
pin of Q8101
pin of Q8151
OK
OK
Impossible to Check Impossible to
Replace the
replace Q8151 the power replace Q8101
terminal
supply circuit
Replace Confirm waveform
HDMI Board is viewable by
NAHDM-9114 oscilloscope
from the terminal
to Q8101 or Q8151
Find out Find out
bad part and bad part and
replace it replace it
HDMI IN1,
Q8401 SII9134
IN2, IN3, IN4
is NG
all no output
Check power
Q8501 SII9135
supply pin of
is NG
Q8401
Check the
Check power
NG
power supply
supply pin of
circuit for
Q8501
Q8401
OK
Impossible to Check Impossible to
replace Q8501 the power replace Q8401
supply circuit
for Q8501
Resolder the Replace Replace
pins of the parts HDMI Board HDMI Board
from the terminal NAHDM-9114 NAHDM-9114
to Q8101 or
Q8151
Up-conversion
Only HDMI OUT
from analog
SUB no output
video to HDMI
is NG
Path from HDMI IN1 to
Q8451 SII9134
Q8401/8451 to IN4 are
is NG
HDMI OUT normally output
terminal is NG
Check power U8001
HDMI OUT
supply pin of VX-50 is
terminal is NG
Q8451 NG
Check the
Replace the
power supply
terminal
circuit for
Q8451
Check power
Resolder the Impossible to
Impossible to
supply pin of
pins of the replace
replace Q8451
U8001
parts from U8001
Q8401/8451
OK
to the terminal
Change HDMI
Confirm waveform Replace Check the
Board
is viewable by HDMI Board power supply
NAHDM-9114
oscilloscope NAHDM-9114 circuit for
from Q8401/8451 U8001
to the terminal
Find out
bad part and
replace it
TX-SR876/SA876
Display HDMI
DEBUG MODE
Check the
Information
on FL
Path from Refer
U8001 to DEBUG
Q8401 is NG MODE-5,6
According to
each remedy,
solve the
problems
Resolder the
pins of the
parts from
U8001 to
NG
Q8401
Confirm waveform
is viewable by
oscilloscope
from U8001 to
Q8401
Find out
bad part and
replace it