Sony STR-DH740 (serv.man2) Service Manual ▷ View online
STR-DH740
9
2-6. MAIN BOARD
Note: This illustration sees the MAIN board from back side.
3 heat sink section
2 two screws
(+BVTP
(+BVTP
3
u 8)
4 MAIN board
1 Remove the
forty-two solders.
10
STR-DH740
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.
HDMI ARC PARTY S.OPTIMIZER
D.C.A.C.
PL
II x z NEO:6 X D.R.C. D.L.L.
EQ MEM RPT
True HD DTS-HD SPA+B
ST
USB BT UPDATE A.P.M.ZONE 2 3
COAX OPT
COAX OPT
SLEEP
MHz
k Hz
dB
HDMI OUT
A + B
2. Press the [DISPLAY] button to confi rm display as below.
HDMI
PARTY
D.C.A.C.
II z
6
D.R.C.
MEM
True HD
-HD
A B
ST
USB
UPDATE
ZONE 3
OPT
SLEEP
MHz
Hz
A B
3. Press the [DISPLAY] button to confi rm display as below.
ARC
S.OPTIMIZER
PL x NEO: X
D.L.L.
RPT
DTS
SP +
BT
A.P.M.
2
COAX
k
dB
EQ
HDMI OUT
A
+
B
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 comple-
tion 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 comple-
tion 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 initial-
ization is performed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
1. While pressing [A.F.D.] and [PURE DIRECT] buttons simul-
The software version is displayed.
Procedure:
1. While pressing [A.F.D.] and [PURE DIRECT] buttons simul-
taneously, press the [
?
/
1
] button to turn on the main power.
2. The message “H74 XXX” appears.
XXX:
XXX:
Area
display
Each time the [DISPLAY] button is pressed, “SYS vX.XXX”,
“MAIN vX.XX”, “VIDEO vX.XX”, “OSD vX.XX” and
“SFLASHvX.XX” appear in this order, and returns to the
“H74 XXX” display.
“H74 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 si-
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 si-
multaneously, 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.
(a) SHIPMENT MODE
Procedure:
1. While pressing [A.F.D.] and [DIMMER] buttons simultane-
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.] and [DIMMER] buttons simultane-
ously, press the [
?
/
1
] button to turn on the main power.
2. The message “CLEARING” appears and the memories are re-
set 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.] and [DISPLAY] buttons, press the
Procedure:
1. While pressing [A.F.D.] and [DISPLAY] buttons, press the
[
?
/
1
] button to turn on the main power.
2. The message “CLEARING” appears and the memories are re-
set 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
11
STR-DH740
HISTORY MODE
The state that the set is used is memorized.
Procedure:
1. While pressing [TUNING MODE] and [DISPLAY] buttons
The state that the set is used is memorized.
Procedure:
1. While pressing [TUNING MODE] and [DISPLAY] buttons
simultaneously, press the [
?/1
] button to turn on the power and
“HISTORY” is displayed.
2. Each time the [ M ] [ m ] key of remote commander is pressed,
the item is switched in order as follows.
Items
Display
Protector Count
C O U N T
x x x
Total
Power
ON
time
T x x x x x H x x M
Main
Power
On
M
x x x x x H x x M
Protector
type
P R O T x x x x
Sound Field
S N D
F I
E L D
Function
F U N C T I O N
Input Mode
I N P
M O D E
Digital
Select
D I G S E L E C T
Stream
S T R E A M I
N F O
Channel Confi
g
C O N F x x x x x
Headphone
H E A D P H x x x
Volume
V O L : x x
Muting
M U T I N G : x x
Bass
B
A
S
S
x x x
Treble
T R E B L E x x x
Front
Level
F x x x / x x x
Center
Level
C x x x / x x x
Surround
Level
S x x x / x x x
Surround
Back
Level
B x x x / x x x
Front
Height
Level
H x x x / x x x
Temperature
T
E
M
P
:
Total
Power
On
T x x x x x H x x M
Main
Power
On
M
x x x x x H x x M
Power On Count
R E B O X :
x x
USB UPDATE TEST MODE
To update micontroller software through USB.
Procedure:
1. Plug in USB device in power off condition.
2. While pressing [TUNING MODE] and [PURE DIRECT]
To update micontroller software through USB.
Procedure:
1. Plug in USB device in power off condition.
2. While pressing [TUNING MODE] and [PURE DIRECT]
buttons simultaneously, press the [?/1] button to turn on the
main power.
main power.
3. The message “UPDATING” appears.
4. If the updating progress succeeds, the message “COMPLETE”
4. If the updating progress succeeds, the message “COMPLETE”
appears.
5. If the updating progress fails, the message “ERROR” appears.
USB UPDATE VERSION MODE
Function that displays the version number to check whether USB
update is necessary or not.
Procedure:
1. While pressing [TUNING MODE] and [DIMMER] buttons,
Function that displays the version number to check whether USB
update is necessary or not.
Procedure:
1. While pressing [TUNING MODE] and [DIMMER] buttons,
press the [?/1] button to turn on the main power.
2. The message “VER X.XXX” is displayed. “X.XXX” is
calculated by adding all fi rmware version.
Example:
(MCU ver. + VIDEO ver. + DSP ver. + OSD ver. + 6)/10 =
Displayed USB Update version
MCU = 1.01, VIDEO = 1.04, DSP = 1.02, OSD = 1.03
↓
(1.01 + 1.04 + 1.02 + 1.03 + 6)/10 = 1.010
1.010 = X.XXX
12
STR-DH740
FIX MODEL AND DESTINATION MODE
This mode is to fi x the set for model & destination.
When turning on the set, the message below appears if the setting
is not fi xed with its model or destination or both (model & destina-
tion).
This mode is to fi x the set for model & destination.
When turning on the set, the message below appears if the setting
is not fi xed with its model or destination or both (model & destina-
tion).
Items
Display
MODEL & AREA NOT
FIX
FIX
M D. D S T. U N F I X
MODEL NOT FIX
M O D E L. U N F I
X
AREA/DESTINATION
NOT FIX
NOT FIX
D E S T. U N F I X
Procedure:
1. Press the [?/1] button to turn on the main power.
2. While pressing [DISPLAY] button, press and release the
1. Press the [?/1] button to turn on the main power.
2. While pressing [DISPLAY] button, press and release the
[A.F.D.], [MOVIE], [MUSIC] button in order, the message
“SPECIALIZE” appears.
“SPECIALIZE” appears.
3. Press the [ M ] or [ m ] key of the remote commander, the
message “<SPECIAL>” appears.
4. Press the [ ] key of the remote commander to enter the
Special Menu List.
5. Each time the [ M ] or [ m ] key of the remote commander is
pressed, the item is switched in order as follows.
Items
Display
SYSTEM
VERSION
S Y S v X. X X X
MAIN VERSION
M A I
N
v X. X X
VIDEO VERSION
V I
D E O
v X. X X
OSD VERSION
O S D
v X. X X
DSP SFLASH1 VER
S F L A S H v X. X X
MODEL
setting
M
O
D
E
L
DESTINATION setting D E S T I
N Y
MODEL &
DESTINATION check
DESTINATION check
M O D E L & A R E A
6. Go to MODEL setting and press the [ ] key of remote
commander.
7. Either one of the message as below appears.
Items
Display
Model not fi
x
yet
M O D E L. U N F I X
Model STR-H54 fi
x
H 5 4 f i x
Model STR-H74 fi
x
H 7 4 f i x
8. Press the [ M ] or [ m ] key of remote commander to set model
info as “H74 fi x” if message “MODEL UNFIX” appears.
9. Press the [ ] key of remote commander to select the model.
10. The message “MODEL” appears.
11. Go to DESTINATION setting and press the [ ] key of
10. The message “MODEL” appears.
11. Go to DESTINATION setting and press the [ ] key of
remote commander.
12. Either one of the display below appears according to the
destination of the set.
Items
Display
Destination
D E S T U N F I X
Destination UCA fi
x
U
C
A
f i x
Destination J
fi
x
J
f i x
Destination TW
fi
x
T
W
f i x
Destination SP/CN fi
x
C
N
f i x
Destination KR
fi
x
K
R
f i x
Destination E2/E3 fi
x
C
H
3 f i x
Destination CEL fi
x
C
E
L f i x
Destination AU
fi
x
A
U
f i x
Destination SP
fi
x
S
P
f i x
Destination E51 fi
x
E 5 1 f i x
Destination BR
fi
x
B
R
f i x
Destination AR
fi
x
A
R
f i x
Destination MX
fi
x
M
X
f i x
13. Press the [ M ] or [ m ] key of remote commander to set
destination info if message “DEST UNFIX” appears.
14. Press the [ ] key of remote commander to select the
destination.
15. The message “DESTINY” appear.
16. Go to MODEL & DESTINATION check and press the [ ]
16. Go to MODEL & DESTINATION check and press the [ ]
key of remote commander.
17. Either one of the message as below appears.
Items
Display
MODEL & AREA NOT FIX
M D. D S T. U N F I X
MODEL NOT FIX
M O D E L. U N F I X
DESTINATION NOT FIX
D E S T.
U N F I X
STR-H74
H 7 4 x x x
MODEL & DESTINATION
RESET
RESET
M D. D S T. U N F I X
xxx:
Area
display
18. Repeat step (6) onwards if message “MD.DST.UNFIX”
appears.
19. Repeat step (6) until step (9) and continue with step (16)
onwards if message “MODEL.UNFIX” appears.
20. Repeat step (13) onwards if message “DEST. UNFIX”
appears.
21. Set need to be reset and updated again if the message
appeared incorrectly.
22. Press the [ M ] or [ m ] key of remote commander goes to
“MD.DST.UNFIX”.
23. Press the [ ] key of remote commander.
24. The set will power off and then power on by itself.
25. Start the setting again from step (1) onwards.
26. Perform SHIPMENT MODE if the message appears correctly.
27. The set will be power off itself and can be used as normal by
24. The set will power off and then power on by itself.
25. Start the setting again from step (1) onwards.
26. Perform SHIPMENT MODE if the message appears correctly.
27. The set will be power off itself and can be used as normal by
pressing [?/1] button.
Ver. 1.3
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