Media Receiver Unit (Mbt-Xbr900) - Sony KE-50XBR900 - 50" Xbr Plasma Wega™ Integrated Television Service Manual

3-2. MEDIA RECEIVER UNIT (MBT-XBR900)

Sound not output
from speaker
No sound from Both
speakers for all input
NO
YES
"MONITOR OUT"
output ?
NO
YES
"SUBWOOFER"
output ?
NO
(try to turn up volume)
YES
(make sure the input signal
is under 200Hz)
Display Signal Out
(Black) 26pin output?
26 i ? NO
(DC signal only)
YES
Possibility
Cable defect
•
Panel failure
•
Note)
If the condition of small or no sound occurs for only one speaker,
perform the balance adjustment beforehand as follows:
MENU AUDIO BALANCE ADJUST
No sound from one
speaker for all input
YES
Check CXA2069Qs
•
(IC4001, IC4303) on AD
"SURROUND" ON
YES
Check input of
•
NJW1149
(IC4703) on AU
Check AK4524
•
(IC5002) on M
Check AK4114
•
(IC5003) on M
Check
•
Check CXA2069Q
•
SN65LVDS1050
(IC4001, IC4303) on AD
(IC5101) on M
Check input of
•
NJW1149
(IC4703) on AU
NO
output?
NO
Check output of NJW1149
•
(IC4703) on AU
Check output of AK4524
•
(IC5002) on M
Panel failure
•
Check of AK4524 (IC5002) on M
•
No problem when around 3MHz of rectangular wave(3.3Vpp) is output from the 13-pin
SDTO.(The rectangular wave changes depending on the audio signal.)
For the analog system, check the inputs ( 2 and 3pins) and the outputs( 25 through 28pins). The
outputs of these terminals change depending on the volume adjustments.
Check of AK4114 (IC5003) on M
•
No problem when around 3MHz of rectangular wave(3.3Vpp) is output for the JL5003[SPDIF].
(The rectangular wave changes depending on the audio signal.)
Check that 48kHz of rectangular wave(3.3Vpp) is supplied to the 24-pin LRCK.(Supply source: AK4524)
Check that 3.072MHz of rectangular wave(3.3Vpp) is supplied to the 26-pin BICK.(Supply source: AK4524)
Check of Display Signal Out (Black) 26pin
•
The output signal level is about 3.3Vpp when the Display Signal Out terminals are not connected to the
Display unit.
If the signals, SPDIF+/- and UART_O+/-, are output, no problem for the sending end.
(When the Diplay Signal Out terminals are connected to the Display unit via display interface cable,
the signal level is about 350mVpp since the signal is terminated at Display unit.)
For receiving ends ( SIRCS input and UART input) the check can only be performed when the Display
Signal
Out terminals are connected to the diplay unit.
Check the source of input signal whichsound does not
come.
Check TUNER
•
Check INPUT TERMINAL
•
Check CXA2069Q
•
(IC4001, IC4303) on AD
KE-50XBR900(UC) 3-2