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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 [

?/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] 

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.

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 [

?

/

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 [

?/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 

simultaneously, press the [

?

/

1

] button to turn on the main 

power.

2.  The message “H55 XXX” or “H75 XXX” appears.
 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.

 

X.XX: Software version

KEY  CHECK  MODE
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 

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 [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 

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 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-

ously, press the [

?

/

1

] button to turn on the main power.

2.  The message “MIC” appears.
 

MIC: mode that output audio from mic input

HISTORY  MODE
The state that the set is used is memorized.
Procedure:
1.  While pressing [TUNING MODE] and [DISPLAY] buttons si-

multaneously, 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.

  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 Config

 

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 

   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
  (Only for STR-DH750)

 

B     x x x /  x x x

  Front Height Level
  (Only for STR-DH750)

 

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] 

buttons simultaneously, 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 of all firmware to 
check whether USB Update Test 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 =

 

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

FIX  MODEL  AND  DESTINATION  MODE
This mode is to fix the set for model & destination.
When turning on the set, the message below appears if the setting 
is not fixed with its model or destination or both (model & destina-
tion).

  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

 AREA/DESTINATION
 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 

[A.F.D./2CH], [MOVIE], [MUSIC] button in order, the 
message “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.

 

MODEL 

setting

 

M 

O 

D 

E 

L 

    

  DESTINATION setting  D  E  S  T  I 

N  Y   

 

 MODEL & 
 DESTINATION check

 

M O D E L  + D E S T

 

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

6.  Go to MODEL setting and press the [

] key of remote 

commander.

7.  Either one of the message as below appears.

 Model not fix 

yet

 

M O D E L. U N F  I  X

 Model STR-H55 fix

 

H 5 5   f  i  x    

 Model STR-H75 fix

 

H 7 5   f  i  x    

8.  Press the [ 

M ] or [ m ] key of remote commander to set model 

info as “H55 fi x” or “H75 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 

remote commander.

12. Either one of the display below appears according to the 

destination of the set.

 Destination

 

D E S T   U N F I  X

 Destination  UCA 

fix  

U 

C 

A 

 f i x 

  

 Destination  J 

fix  

J 

   f i x 

  

 Destination  TW/SA2 fix  

T 

W 

  f i x 

  

 Destination  SP/CN fix  

C 

N 

  f i x 

  

 Destination  KR 

fix  

K 

R 

  f i x 

  

 Destination  E2/E3  fix  

C 

H 

3 

 f i x 

  

  Destination CEL 

fix  

C 

E 

L 

 f i x 

  

  Destination AU 

fix  

A 

U 

  f i x 

  

  Destination E12 

fix  

E 1 2   f  i  x    

  Destination E51 

fix  

E 5 1   f  i  x    

  Destination BR 

fix  

B 

R 

  f i x 

  

  Destination AR 

fix  

A 

R 

  f i x 

  

  Destination MX 

fix  

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 [

] 

key of remote commander.

17. Either one of the message as below appears.

  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-H55

H 5

5

x

x

x

 STR-H75

H 7

5

x

x

x

 xxx: 

Area 

display

18. Repeat step (6) onwards if message “MD.DST.UNFIX” 

appears.

19. Repeat step (6) until step (10) 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 

pressing [?/1] button.

Procedure:
1.  Turn on the set.
2.  Input the following signal from Signal Generator to FM 

antenna 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: 

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.”

MHL  VBUS  TEST  MODE
To display MHL VBUS status
Procedure:
1.  Press the [

?

/

1

] button to turn on the main power.

2.  While pressing [DISPLAY] button, press and release the 

[MUSIC], [MOVIE], [A.F.D./2CH] button in order, the 
message “VBUS STAT” appears.

3.  Press the [

] key of the remote commander to check the 

items.

 No Error

N O

E R O R

 Current Limited

C U R

L

I

M

I

T D

 Current Stopped

C U R

S T O P P D