Sony STR-DH720 / STR-DH720HP Service Manual ▷ View online
STR-DH720/DH720HP
9
SECTION 3
TEST MODE
AM CHANNEL STEP 9 kHz/10 kHz SELECTION MODE
(US and Canadian only)
* Either the 9 kHz step or 10 kHz step can be selected for the
(US and Canadian only)
* Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.
* Procedure:
1. Press the [
1. Press the [
?/1
] button to turn on the main power.
2. Turn the [INPUT SELECTOR] buttons 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 “9k STEP” or “10k STEP”.
6. After a few second, “AM 531
6. After a few second, “AM 531
kHz
” or “AM 530
kHz
” appears,
select the desire step.
VACUUM FLUORESCENT DISPLAY TEST MODE
* All fl uorescent segments are tested.
When this test is activated, all segments light on at the same
* All fl uorescent 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 depressing the [TUNING +] and the [DIMMER] but-
While depressing the [TUNING +] and the [DIMMER] but-
tons simultaneously, press the [
?
/
1
] button to turn on the main
power.
1. ALL segments light on.
LH
RH
SW
L
R
C
SBL
SBR
SB
SL
SR
S
x z
II
PL
D + EX
LFE
COAX
HDMI
OPT
-ES
MSTR
96/24
HI RES
NEO:6
LBR
S-AIR
LPCM
TrueHD
SLEEP
D.RANGE
AAC ST
dB RDS
k Hz m
MHz ft.
MHz ft.
DTS
DTS-HD
2. Press the [DISPLAY] control, confi rm display.
LH
RH
SW
L
R
C
SBL
SBR
SB
SL
SR
S
z
PL
+
LFE
COAX
HDMI
OPT
-ES
MSTR
96/24
HI RES
NEO:6
LBR
S-AIR
LPCM
TrueHD
SLEEP
D.RANGE
AAC
dB
k m
ft.
DTS
DTS-HD
3. Press the [DISPLAY] control, confi rm display.
LH
RH
SW
L
R
SBL
SBR
S
x
II
PL
D EX
LFE
COAX
HDMI
OPT
-ES
MSTR
96/24
HI RES
NEO:6
LBR
S-AIR
LPCM
TrueHD
SLEEP
D.RANGE
ST
RDS
Hz
MHz
DTS
DTS-HD
4. Press the [DISPLAY] control, 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
* The preset sound fi eld is cleared when this mode is activated.
Use this mode before returning the product to clients upon
completion of repair.
* Procedure:
1. While depressing the [MUSIC] button, press the [
1. While depressing the [MUSIC] button, press the [
?/1
] button
to turn on the main power.
2. The message “S.F. CLEAR” appears for a moment and initiali-
zation is performed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
* Procedure:
1. While pressing the [TUNING MODE] and [DISPLAY] but-
The software version is displayed.
* Procedure:
1. While pressing the [TUNING MODE] and [DISPLAY] but-
tons, press the [
?
/
1
] button to turn on the main power.
2. The message “H7 ** MX.XX” appears.
**: Destination
X.XX: Software version
X.XX: Software version
Each time the [DISPLAY] button is pressed, “H.VER X.XX”,
“S.VER X.XX” and “F.VER X.XX” appear in this order, and
returns to the “H7 ** MX.XX” display.
“S.VER X.XX” and “F.VER X.XX” appear in this order, and
returns to the “H7 ** MX.XX” display.
KEY CHECK MODE
* Button check
* Procedure:
1. While depressing the [TUNING +] and the [MUTING] but-
* Button check
* Procedure:
1. While depressing the [TUNING +] and the [MUTING] but-
tons simultaneously, press the [
?/1
] button to turn on the
main power.
2. Either the message “REST 14” appears.
Every pressing of any button other than the [
?/1
] counts
down the buttons. The buttons which are already counted
once are not counted again. When all buttons are pressed
“REST 00” appears.
once are not counted again. When all buttons are pressed
“REST 00” appears.
SWAP ALL MODE
* The signal will be swap to all channel so that all speaker will
* The signal will be swap to all channel so that all speaker will
have sound output.
* Procedure:
1. While depressing the [TUNING MODE] and the [MOVIE]
1. While depressing the [TUNING MODE] and the [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.
(a) SHIPMENT MODE
* Procedure:
1. While pressing the [TUNING MODE] and [DIMMER] but-
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 the [TUNING MODE] and [DIMMER] but-
tons, 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 the [TUNING MODE] and [MUTING] but-
* Procedure:
1. While pressing the [TUNING MODE] and [MUTING] but-
tons, 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 depressing the [INPUT MODE] and the [A.F.D.] but-
* To disable auto off after protector occur.
* Procedure:
1. While depressing the [INPUT MODE] and the [A.F.D.] but-
tons simultaneously, press the [
?
/
1
] button to turn on the main
power.
2. “PROT OFF” appears and switch on the set.
STR-DH720/DH720HP
10
HISTORY MODE
The state that the set is used is memorized.
* Procedure:
1. While pressing the [INPUT MODE] and [MUSIC] buttons,
The state that the set is used is memorized.
* Procedure:
1. While pressing the [INPUT MODE] and [MUSIC] buttons,
press the [
?/1
] button to turn on the power and “HISTORY”
is displayed.
2. Each time the [ r ] [ R ] key of remote commander is pressed,
the item is switched in order as follows.
Items
Display
Protector count
COUNT XX
Total single power on time
XXXXXHXX 01
Sound fi eld
SND FLD
Input function
FUNCTION
Input mode
INP MODE
Digital select
DIG IN
Stream information
STREAM
Signal confi guration
CO XXXXX
Headphones
HP XXX
Volume
VOL XX
Bass
BASS XXX
Treble
TREB XXX
Level FL/FR
F XXXXXX
Level SL/SR
S XXXXXX
Level CT/SW
CWXXXXXX
Level BL/BR
B XXXXXX
Level LH/RH
H XXXXXX
Total power on time
XXXXXHXX 02
Muting
MUTE XXX
Power on counter
(Rebox test mode)
(Rebox test mode)
REBX.XXXX
Protector Type
PROTXXXX
Temperature record
TEM XXXX
DCAC TEST MODE
* Procedure:
1. While pressing [INPUT MODE] and [MOVIE] buttons, press
the [?/1] button to turn on the main power.
2. The message “SOURCE” or “MIC” appears.
Repeat step 1 to toggle between “SOURCE” and “MIC”.
SOURCE: normal mode
MIC: mode that output audio from mic input
USB UPDATE TEST MODE
To update Main MCU, Video MCU, DSP serial fl ash and Hudson
II software through USB.
* Procedure:
1. Plug in USB device in power off condition.
2. While pressing the [TONE MODE] and the [DISPLAY]
To update Main MCU, Video MCU, DSP serial fl ash and Hudson
II software through USB.
* Procedure:
1. Plug in USB device in power off condition.
2. While pressing the [TONE MODE] and the [DISPLAY]
buttons, press the [
?/1
] button to turn on the 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 [TONE MODE] and [DIMMER] buttons,
Function that displays the version number to check whether USB
update is necessary or not.
* Procedure:
1. While pressing [TONE 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:
(MAIN ver. + DSP ver. + HDMI ver. + FARO ver. + 6)/10 =
Displayed version
Displayed version
MAIN = 1.02, DSP = 1.01, HDMI = 1.00, FARO = 1.03
↓
(1.02 + 1.01 + 1.00 + 1.03 + 6)/10 = 1.006
1.006 = X.XXX
STR-DH720/DH720HP
11
SECTION 4
ELECTRICAL ADJUSTMENT
VIDEO CALIBRATION ADJUSTMENT
Adjustment to decide the standard of the video input signal.
Note: After replacing DIGITAL VIDEO board, or after “RESET” of the
special menu mode is executed, perform this adjustment.
special menu mode is executed, perform this adjustment.
1. Adjustment jig
The color pattern generator that can output 100% in NTSC/PAL/
HD color bar signal to the component and the composite at the
same time is necessary for the adjustment.
When there is no color pattern generator, it is possible to substitute
it by the Blu-ray Disc player that can output the component
terminal and the video terminal at the same time (Substitution
model name example: BDP-S350).
However, please do the following signal output confi rmation with
the oscilloscope beforehand when substituting it with the Blu-ray
Disc player.
The color pattern generator that can output 100% in NTSC/PAL/
HD color bar signal to the component and the composite at the
same time is necessary for the adjustment.
When there is no color pattern generator, it is possible to substitute
it by the Blu-ray Disc player that can output the component
terminal and the video terminal at the same time (Substitution
model name example: BDP-S350).
However, please do the following signal output confi rmation with
the oscilloscope beforehand when substituting it with the Blu-ray
Disc player.
2. Video calibration adjustment
2-1. Connection
2-1. Connection
color pattern
generator
or
Blu-ray
Disc player
set
HDMI TV
OUT
ANALOG VIDEO board
COMPONENT
COMPONENT
VIDEO
SAT/CATV
(IN2)
SAT/CATV VIDEO IN jack
2-2. Procedure for color pattern generator
1. It connects of step 2-1, and then turn on the main power.
2. “SAT/CATV” is selected by using [INPUT SELECTOR] dial.
3. Input NTSC color bars signal from the color pattern generator.
4. Press the [
1. It connects of step 2-1, and then turn on the main power.
2. “SAT/CATV” is selected by using [INPUT SELECTOR] dial.
3. Input NTSC color bars signal from the color pattern generator.
4. Press the [
?/1
] button to turn off the main power.
5. While pressing the [MOVIE] and [SPEAKERS] buttons, press
the [
?/1
] button to turn on the main power. When correctly
entering the test mode “FIN_ _ _” is displayed (press the
buttons again until the message appear).
buttons again until the message appear).
6. The NTSC signal adjustment is begun when press the cross
(center of cursor) button of remote commander, and the display
changes from “N-MWX_ _ _” to “N-MWOCDV” little by little.
changes from “N-MWX_ _ _” to “N-MWOCDV” little by little.
Finally, the display returns to the display of “FINN _ _”.
7. Input PAL color bars signal from the color pattern generator.
8. Perform step 6 to 7 for the PAL signal adjustment.
9. Input HD color bars signal (720p or 1080i) from the color
8. Perform step 6 to 7 for the PAL signal adjustment.
9. Input HD color bars signal (720p or 1080i) from the color
pattern generator.
10. Perform step 6 to 7 for the HD signal adjustment.
11. Then turn off the main power.
11. Then turn off the main power.
2-3. Procedure for Blu-ray Disc player
1. It connects of step 2-1, and then turn on the main power of set
1. It connects of step 2-1, and then turn on the main power of set
and Blu-ray Disc player.
2. “SAT/CATV” is selected by using [INPUT SELECTOR] dial.
3. Press the OPEN/CLOSE button of the Blu-ray Disc player, and
3. Press the OPEN/CLOSE button of the Blu-ray Disc player, and
DVD test disc “HLX-504 (Part No. J-6090-088-A)” or “HLX-
513 (Part No. J-2501-305-A)” is insert. The disc playback
automatically becomes start “Main Menu” is display.
513 (Part No. J-2501-305-A)” is insert. The disc playback
automatically becomes start “Main Menu” is display.
4. “1.Color Bar 100%” of “1.Video Signal” is reproduced, and
100% in the color bar is displayed in the TV monitor, playing
the Blu-ray Disc player is pause playback.
the Blu-ray Disc player is pause playback.
5. Press the [
?/1
] button to turn off the main power of the set.
6. While pressing the [MOVIE] and [SPEAKERS] buttons, press
the [
?/1
] button to turn on the main power of the set. When
correctly entering the test mode “FIN_ _ _” is displayed
(press the buttons again until the message appear).
(press the buttons again until the message appear).
7. The NTSC signal adjustment is begun when press the cross
(center of cursor) button of remote commander, and the display
changes from “N-MWX_ _ _” to “N-MWOCDV” little by little.
changes from “N-MWX_ _ _” to “N-MWOCDV” little by little.
Finally, the display returns to the display of “FINN _ _”.
8. Press the OPEN/CLOSE button of the Blu-ray Disc player, and
change to DVD test disc “HLX-506 (Part No. J-6090-077-A)”
or “HLX-507 (Part No. J-6090-078-A)”. The disc playback
automatically becomes start “Main Menu” is display.
or “HLX-507 (Part No. J-6090-078-A)”. The disc playback
automatically becomes start “Main Menu” is display.
9. “1.Color Bar 100%” of “1.Video Signal” is reproduced, and
100% in the color bar is displayed in the TV monitor, playing
the Blu-ray Disc player is pause playback.
the Blu-ray Disc player is pause playback.
10. The PAL signal adjustment is begun when press the cross
(center of cursor) button of remote commander. Finally, the
display returns to the display of “FINN P _”.
display returns to the display of “FINN P _”.
11. Press the OPEN/CLOSE button of the Blu-ray Disc player, and
change to DVD test disc “HLX-104 (Part No. J-6090-199-A)”.
The disc playback automatically becomes start “Main Menu”
is display.
The disc playback automatically becomes start “Main Menu”
is display.
12. “59.94Hz, 1080i” → “1.Video Signal” → “1.Color Bar 100%”
is selected, and 100% in the color bar is displayed in the TV
monitor, playing the Blu-ray Disc player is pause playback.
monitor, playing the Blu-ray Disc player is pause playback.
13. The video output of the Blu-ray Disc player is switched 1080i
(The output from the component terminal of the Blu-ray Disc
player becomes 1080i output).
player becomes 1080i output).
14. The HD signal adjustment is begun when press the cross
(center of cursor) button of remote commander. Finally, the
display returns to the display of “FINN P N”.
display returns to the display of “FINN P N”.
15. Then turn off the main power.
STR-DH720/DH720HP
12
FM AUTO STOP CHECK
generator
OUT (75
Ω)
set
Procedure:
1. Turn on the set.
2. Input the following signal from Signal Generator to FM an-
1. Turn on the set.
2. Input the following signal from Signal Generator to FM an-
tenna input directly.
* Carrier Frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
Deviation
: 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
ANT input : 35 dBu (EMF)
Note:
Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confi rm that input Frequency of A, B and C are detected and
automatic scanning stops.
The stop of automatic scanning means “The station signal is
received in good condition.”
received in good condition.”
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