DOWNLOAD Sony STR-DH720 / STR-DH720HP Service Manual ↓ Size: 9.19 MB | Pages: 127 in PDF or view online for FREE

Model
STR-DH720 STR-DH720HP
Pages
127
Size
9.19 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-dh720-str-dh720hp.pdf
Date

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 
AM channel step.
* Procedure:
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] 
button to turn on the main power.
5.  Either the message “9k STEP” or “10k STEP”.
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 
time, then each segment lights on one after another.
* Procedure:
  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.
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 
completion of repair.
* Procedure:
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-
tons, press the [
?
/
1
] button to turn on the main power.
2.  The message “H7 ** MX.XX” appears. 
**: Destination 
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.
KEY CHECK MODE
* 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.
SWAP ALL MODE
*  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] 
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-
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-
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 [
?
/
1
] button for 5 seconds.
2.  The message “CLEARING” appears on the display.
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-
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, 
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)
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] 
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” 
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, 
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
 
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.
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.
2.  Video calibration adjustment
2-1. Connection
color pattern
generator
or
Blu-ray 
Disc player
set
HDMI TV
OUT
ANALOG VIDEO board
 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
] 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).
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.
 
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 
pattern generator.
10. Perform step 6 to 7 for the HD signal adjustment.
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 
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 
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.
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.
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).
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.
 
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.
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.
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 _”.
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.
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.
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).
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”.
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-
tenna input directly.
*  Carrier Frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation 
: 75 kHz
Modulation  : 1 kHz
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.
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.”
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