Sony STR-DN1080 Service Manual page 46

STR-DN1080/ZA810ES
A
– From the page 45 –
Measure the power amplifier circuit (each channel
(FL/FR/SL/SR/SBL/SBR/C) on the MAIN board) with
a tester, and check the following things.
1. Between the power supply line and the ground
does not short-circuit.
2. The resistance is normal.
Check the surrounding circuit of power transistor
(Q1550, Q1551, Q1600, Q1601, Q1650, Q1651,
Q1700, Q1701, Q1750, Q1751, Q1800, Q1801,
Q1850, Q1851 on the MAIN board), and surrounding
circuit of power amplifier circuit (each channel
(FL/FR/SL/SR/SBL/SBR/C) on the MAIN board), and
replace the defective parts.
NG The sound occurs from the
Press the
[2CH/MULTI] RY1390 on the MAIN board by
button to select the inserting and removing
"MULTI ST.", and
headphone.
the sound by
various source
(example: coaxial
input, analog input)
is outputted from
all the channels
(FL/FR/SL/SR/
Press the [
SBL/SBR/C/SW
remote commander once, and
OK
the sound is outputted from this
unit.
Explain the settings of this unit
to the customer.
The sound from the coaxial input is
outputted, when the sound field is
"MULTI ST.".
OK
The sound from the optical input is
outputted, when the sound field is
"MULTI ST.".
OK
The sound from the analog input is
outputted, when the sound field is
"MULTI ST.".
OK
C
– Continued the page 47 –
46
B
– From the page 45 –
OK
NG Check The following parts and
the surrounding circuit, and
replace the defective parts.
HP board: J1101
MAIN board: Q1375, RY1390
OK
Work completed
Replace the MB-1613 board.
NG
In the "SOFTWARE VERSION
] button on the
%
DISPLAY MODE" (refer to page
36), the DSP1/DSP2/DSP3
serial flash software versions
are not "0.00".
OK
NG The "COAX" is displayed on the
display panel.
OK
D
– Continued the page 47 –
NG The "OPT" is displayed on the
display panel.
OK
D
– Continued the page 47 –
NG The audio data is inputted to the
following pins.
MB-1613 board: CN8001 pin 14, 16
OK
D
– Continued the page 47 –
NG Check the surrounding circuit,
and replace the defective parts.
NG
The voltage of the following
pins are the following value.
MB-1613 board: CN301
pin 4: 2.15 V
pin 6: 4.5 V
OK
Check the following parts and
the surrounding circuit, and
replace the defective parts.
DCDC board: IC1911, IC1916
NG Check the following part and the
surrounding circuit, and replace
the defective parts.
COAX board: IC101
Work completed
Replace the MB-1613 board.
Work completed
NG Check the following part and the
surrounding circuit, and replace
the defective parts.
MAIN board: IC1231
NG Check the following parts and the
surrounding circuit, and replace
the defective parts.
MAIN board: IC1414, J1401, J1402
OK
NG
SYS SET