Onkyo TX-SR308 Service Manual page 4

A B
Note:
TROUBLE SHOOT-3
This is just for general reference and does not include every single case.
No Sound
The above waveforms are got by Oscilloscope of Maximum Horizontal Sensitivity: 100MHz.
The results depend on the oscilloscope.
1
No Sound
from HDMI input
BAHDM-0401(HDMI Board)
P8001 16pin HDMI_SPDIF .
Y
15pin HDMI_MCK
13pin HDMI_BCK
11pin HDMI_LRCK
9pin HDMI_FLR
Waveforms are no problem?
2
N
BAHDM-0401 (HDMI Board)
JL801 1&4pin +12V
N
3
BAETC-0352(torans terminal)
JL952 1-3pin AC10V
Repair
Y Y
BAVD-0375(Video)
Replace Video Board or Repair
D9011/R9013/R9012
and their peripheral circuit.
4
Replace Power
transformer or
Repair its peripheral
circuit.
BAHDM-0401(HDMI Board)
Make sure that JL801 3pin is 12V
Replace HDMI Board
or Replace Q8101(HDMI_4RX)
or Repair its peripheral circuit.
5
6
HDMI_SPDIF
7
V:1V/cm H:0.1µ/cm
8
TX-SR308 HT-R280/ 380/ 538/ C230
C D
No Sound
from COASXL/OPT input
BADG-0364(MPU Board)
N
BAHDM-0403(HDMI Board)
P2001 21 22pin +5V
DIR_OUT
P8001 3pin DIR_BCK
5pin DIR_LRCK
Y
7pin DIR_FLR
P8002 23pin DIR_MCK
Waveforms are no problem?
BADG-0364(MPU Board)
Replace MPU Board or
Replace
Y
U131/132 Q301 Q131 or
Repair their peripheral circuit.
BADG-0364
(MPU Board) DSP_OUT
P8002 24pin DSP_FL/R
N
BADG-0401(HDMI Board)
P8001 8pin DSP_SL/R
,
10pin DSP_CSW JL801 2pin and 4pin +12V
,
4pin CX_SCLK
.
6pin CX_LRCLK
Y
Waveforms are no problem?
Y
BAHDM-0401(HDMI Board)
Make sure that JL801 2pin & 4pin is
12V. Replace HDMI Board or
Replace Q201(DSP-IC) or
Repair its peripheral circuit.
N
BADG-0364(MPU Board)
DAC_OUT
Analog signal outputs from 4-9
N BADG-0364(MPU Board)
pins of P5502?
P2001 21 22pin +5V
4pin----FR 5pin----FL
6pin----SW 7pin----C
8pin----SR 9pin----SL
BADG-0364(MPU Board)
Replace MPU Board or
Y
Replace Q302 or
Repair its peripheral circuit.
DIR_FLR DIR_LRCK
DSP_FLR/SLR/CSW CX_LRCK
HDMI_FLR HDMI_LRCK
V:1V/cm H:0.1µ/cm
E F
BAETC-0352(torans terminal)
N N
JL952 1-3pin AC10V
Y
BAVD-0375(Video Board)
Replace Video Board or
Repair
Q9031/D9011/R9013/R9012
and their peripheral circuit.
N
N
BAETC-0359(torans terminal)
JL952 1-3pin AC10V
Y
BAVD-0382/0389(Video Board)
Replace Video Board or
Repair
D9011/9013/R9012
and their peripheral circuit.
BAETC-0352(torans terminal)
N
N
JL952 1-3pin AC10V
Y Y
BAVD-0382/0389(Video Board)
Replace Video Board or Replace Power
Repair transformer or
Repair its peripheral
Q9031/D9011/R9013/R9012
circuit.
and their peripheral circuit.
DIR_BCK
CX_SCLK
HDMI_BCK
V:1V/cm H:5µ/cm V:1V /cm H:0.1µv/cm
G H I
No Sound
from ANALOG input
Y
AUDIO-SEL_OUT
BAAF-0341(AF Board)
Signal output is no problem?
Q4170 3pin +15V
BAAF-0341(AF Board) N
Q4171 3pin -15V
SR--J4083 FR----J4081
D4172 anode +7V
C----J4093 FL----J4095
D4171 cathode -7V
SL--J4175 SW--J4082
Y
refer to a figure
BCAF-0341(AF Board)
Y
Replace AF Board or
Repair Q4001 and its
peripheral circuit.
(AMP_OUT)
Signal output is no problem?
BAAF-0341(AF Board)
N
central lead wire of the resistance
SR---R6064 FR---R6061
C-----R6062 FL----R6060
SL----R6063
SW---R6067
Y
BCAF-0341(AF Board)
BAAF-0341(AF Board)
N Replace AF Board or
R6302 or 6322 +22V
Repair R4160/4166
refer to a figure
D4300/4301/4302/4303 and
their peripheral circuit.
Y
BADG-0364(MPU Board)
N
P5503 3pin (SEC1H)
Voltage changes from 0V to
3V about 2 or 3 seconds after
power-on? BADG-0364(MPU Board)
P5503 6pin(I-pro):0V
Y
5pin(V- pro):0V
8pin(V-olh):0V
BADG-0364(MPU Board)
JL501 3pin(THE): +1V or lower
P5504 2pin, 4pin, 5pin
N
Voltage changes from 0V to
3V about 3 or 4 seconds
after power-on?
Y Y
BAAF-0341(AF Board)
BADG-0364(MPU Board)
Replace AF Board or
Replace MPU Board or
Repair Replace Q701 and repair
Q6053/6055/6052/6051
its peripheral circuit.
R6057, and their peripheral
circuit.
DIR_MCK
HDMI_MCK
V:1V/cm H:0.1µv/cm
TX-SR308 HT-280/ 380/ 538/ C230
J K
BCAF-0341(AF Board)
N Replace AF Board or
Repair Q4170, Q4171, D4172, D4171
and their peripheral circuit.
N
N BCAF-0341 (AF Board) N
P6901(+49V) P6902(-49V)
Y
BCAF-0341(AF Board)
Replace AF Board or
BCAF-0341(AF Board)
Replace D6901 F6901
Replace AF Board or
F6902 and repair their
Repair power IC(Q6601/6602)
peripheral circuit.
and their peripheral circuit.
figure