Sony STR-DH550 / STR-DH750 Service Manual ▷ View online
STR-DH550/DH750
7
2-3. BACK PANEL SECTION
8 three screws
(+BVTP
(+BVTP
3
u 8)
8 six screws
(+BVTP
(+BVTP
3
u 8)
8 one screw
(+BVTP
(+BVTP
3
u 8)
1 CNP902 (4P)
3 CN941 (4P)
4 CN1901 (12P)
5 CN3513
(3P)
(3P)
2 Wire is removed
from the pin, lead.
6 wire (flat type)
(9 core) (CN2003)
7 wire (flat type)
(23 core) (CN3514)
9 five screws
(+BVTP
(+BVTP
3
u 8)
0 back panel section
(DH750)
(DH750)
pin, lead
STANDBY DCDC board
:LUHVHWWLQJ
rear side
Ver. 1.1
8
STR-DH550/DH750
2-4. MAIN BOARD SECTION
2 CN951 (5P)
3 CN950 (5P)
6 two screws
(+BVTP
(+BVTP
3
u 8)
7 INSULATION board
8 two screws
(+BVTP
(+BVTP
3
u 8)
9 two screws
(+BVTP
(+BVTP
3
u 8)
6 two screws
(+BVTP
(+BVTP
3
u 8)
:LUHVHWWLQJ
pin, lead
chassis
MAIN board
rear side
1 Wire is removed
from the pin, lead.
1 Wire is removed
from the pin, lead.
8 MAIN board
section
section
qa MAIN board
section
section
B
B
C
B
C
C
4 one screw
(+BVTP
(+BVTP
3
u 8)
5 USB INSULATION
MT PC board
4 one screw
(+BVTP
(+BVTP
3
u 8)
5 USB INSULATION
MT PC board
D
E
D
E
7 two screws
(+BVTP
(+BVTP
3
u 8)
(DH750)
(DH550)
0 one screw
(+BVTP
(+BVTP
3
u 8)
(DH750)
Ver. 1.1
STR-DH550/DH750
9
2-5. MAIN BOARD
Note: This illustration sees the MAIN board from back side.
3 heat sink section
3 heat sink section
4 MAIN board
2 one screw
(+BVTP
(+BVTP
3
u 8)
2 one screw
(+BVTP
(+BVTP
3
u 8)
2 one screw
(+BVTP
(+BVTP
3
u 8)
1 Remove the thirty solders.
(DH550)
Remove the forty-two solders.
(DH750)
(DH550)
(DH750)
(DH750)
(DH750)
(DH750)
(DH550)
F
F
F
STR-DH550/DH750
10
SECTION 3
TEST MODE
TUNER AM STEP CHANGE MODE
(US and Canadian models only)
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Press the [
(US and Canadian models only)
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Press the [
?/1
] button to turn on the main power.
2. Turn the [INPUT SELECTOR] knob to select the “AM TUNER”.
3. Press the [?/1] button to turn off the main power.
4. While pressing the [TUNING MODE] button, press the [?/1]
3. Press the [?/1] button to turn off the main power.
4. While pressing the [TUNING MODE] button, press the [?/1]
button to turn on the main power.
5. Either the message “10K Step” or “9K Step” appears.
6. Repeat step (4) to select desired step.
6. Repeat step (4) to select desired step.
VACUUM FLOURESCENT DISPLAY TEST MODE
All fl ourescent segments are tested.
When this test is activated, all segments light on at the same time,
then each segment lights on one after another.
Procedure:
While pressing [SPEAKERS] and [DIMMER] buttons simultane-
ously, press the [
All fl ourescent segments are tested.
When this test is activated, all segments light on at the same time,
then each segment lights on one after another.
Procedure:
While pressing [SPEAKERS] and [DIMMER] buttons simultane-
ously, press the [
?
/
1
] button to turn on the main power.
1. ALL segments light on.
2. Press the [DISPLAY] button to confi rm display as below.
3. Press the [DISPLAY] button to confi rm display as below.
4. Press the [DISPLAY] button, all segments light off.
SOUND FIELD CLEAR MODE
The preset sound fi eld is cleared when this mode is activated.
Use this mode before returning the product to clients upon com-
pletion of repair.
Procedure:
1. While pressing [MUSIC] button, press the [
The preset sound fi eld is cleared when this mode is activated.
Use this mode before returning the product to clients upon com-
pletion of repair.
Procedure:
1. While pressing [MUSIC] button, press the [
?/1
] button to
turn on the main power.
2. The message “S.F. CLEAR” appears for a moment and
initialization is performed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
1. While pressing [A.F.D./2CH] and [PURE DIRECT] buttons
The software version is displayed.
Procedure:
1. While pressing [A.F.D./2CH] and [PURE DIRECT] buttons
simultaneously, press the [
?
/
1
] button to turn on the main
power.
2. The message “H55 XXX” or “H75 XXX” appears.
XXX:
XXX:
Area
display
Each time the [DISPLAY] button is pressed, “SYS. vX.XX”,
“MAIN vX.XX”, “VIDEO vX.XX”, “OSD vX.XX” and
“SFLASHvX.XX” appear in this order, and returns to the
“H55 XXX” or “H75 XXX” display.
“SFLASHvX.XX” appear in this order, and returns to the
“H55 XXX” or “H75 XXX” display.
X.XX: Software version
KEY CHECK MODE
Each button can be checked.
Procedure:
1. While pressing [SPEAKERS] and [PURE DIRECT] buttons
Each button can be checked.
Procedure:
1. While pressing [SPEAKERS] and [PURE DIRECT] buttons
simultaneously, press the [
?/1
] button to turn on the main
power.
2. The message “REST 12” appears.
Every pressing of any button other than the [
?/1
] counts
down the buttons.
3. The buttons which are already counted once are not counted
again.
4. When all buttons are pressed, “REST 00” appears.
SWAP ALL MODE
The signal will be swap to all channels so that all speakers will
have sound output.
Procedure:
1. While pressing [PURE DIRECT] and [MOVIE] buttons
The signal will be swap to all channels so that all speakers will
have sound output.
Procedure:
1. While pressing [PURE DIRECT] and [MOVIE] buttons
simultaneously, press the [
?
/
1
] button to turn on the main
power.
2. “SWAP MODE” appears.
INITIALIZE MODE
All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
(a) SHIPMENT MODE
Procedure:
1. While pressing [A.F.D./2CH] and [DIMMER] buttons
Procedure:
1. While pressing [A.F.D./2CH] and [DIMMER] buttons
simultaneously, press the [
?
/
1
] button to turn on the main
power.
2. The message “CLEARING” appears and the memories are
reset to the default values.
3. When done, the message “CLEARED *” appears, the set will
power off.
(b) ALL CLEAR INITIALIZE
Procedure:
1. While pressing [A.F.D./2CH] and [DISPLAY] buttons, press
Procedure:
1. While pressing [A.F.D./2CH] and [DISPLAY] buttons, press
the [
?
/
1
] button to turn on the main power.
2. The message “CLEARING” appears and the memories are
reset to the default values.
3. When done, the message “CLEARED *” appears, the set will
power on.
(c) USER INITIALIZE
Procedure:
1. Hold the [
Procedure:
1. Hold the [
?
/
1
] button for 5 seconds.
2. The message “CLEARING” appears on the display.
3. After few seconds, “CLEARED *” appears.
3. After few seconds, “CLEARED *” appears.
PROTECTOR AUTO OFF
To disable auto off after protector occur.
Procedure:
1. While pressing [DISPLAY] and [MOVIE] buttons simultane-
To disable auto off after protector occur.
Procedure:
1. While pressing [DISPLAY] and [MOVIE] buttons simultane-
ously, press the [
?
/
1
] button to turn on the main power.
2. “PROTEVER” appears and switch on the set.
DCAC TEST MODE
To test audio output from mic input and speakers.
Procedure:
1. While pressing [MUSIC] and [DIMMER] buttons simultane-
To test audio output from mic input and speakers.
Procedure:
1. While pressing [MUSIC] and [DIMMER] buttons simultane-
ously, press the [
?
/
1
] button to turn on the main power.
2. The message “MIC” appears.
MIC: mode that output audio from mic input
USB ARC MEM D.R.C.
True HD
PL EQ DTS-HD ST D.C.A.C. SLEEP
OPT BT
COAX
HDMI
SP A B
USB ARC MEM
D.R.C.
True HD
PL
EQ
DTS-HD
ST
D.C.A.C.
SLEEP
OPT BT
COAX
HDMI
SP
A
B
k
USB
ARC
MEM
D.R.C.
True HD
PL
EQ
DTS-HD
ST
D.C.A.C.
SLEEP
OPT
BT
COAX
HDMI
SP
A
B
dB
MHz
k Hz
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