Sony STR-DH590 Service Manual page 34

STR-DH590
A
– From the page 33 –
Measure the power amplifier circuit (each channel
(FL/FR/SL/SR/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
(Q120, Q121, Q130, Q131, Q140, Q141, Q150,
Q151, Q160, Q161 on the MAIN board), and
surrounding circuit of power amplifier circuit (each
channel (FL/FR/SL/SR/C) on the MAIN board), and
replace the defective parts.
NG The sound occurs from the
Press the
[2CH/MULTI]
RY105 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/C/
Press the [
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 35 –
34
B
– From the page 33 –
OK
NG Check The following parts and
the surrounding circuit, and
replace the defective parts.
HP board: J2201
MAIN board: Q181, RY105
OK
Work completed
Replace the H59-DIGITAL
board.
NG
In the "SOFTWARE VERSION
] button on the
%
DISPLAY MODE" (refer to page
29), the DSP serial flash
software versions are not
"0.00".
OK
NG The "COAX" is displayed on the
display panel.
OK
D
– Continued the page 35 –
NG The "OPT" is displayed on the
display panel.
OK
D
– Continued the page 35 –
NG The audio data is inputted to the
following pins.
H59-DIGITAL board:
CN3015 pin 24, 26
OK
D
– Continued the page 35 –
NG Check the surrounding circuit,
and replace the defective parts.
NG
The voltage of the following
pins are the following value.
H59-DIGITAL board: CN3800
pin 4: 2.15 V
pin 5: 4.5 V
OK
Check the following parts and
the surrounding circuit, and
replace the defective parts.
DCDC board: IC1801, IC1841
NG Check the following part and the
surrounding circuit, and replace
the defective parts.
MAIN board: IC085
Work completed
Replace the H59-DIGITAL board.
Work completed
NG Check the following part and the
surrounding circuit, and replace
the defective parts.
MAIN board: IC095
NG Check the following parts and the
surrounding circuit, and replace
the defective parts.
MAIN board: IC104, J100, J101
OK
NG