STR-DH800 - Sony Audio Service Manual (repair manual). Page 9

DIGITAL  MEDIA  PORT  TEST
Procedure:
1.  Connect the DMPORT check jig (Part No. J-2501-309-A) with 

the DMPORT jack (CN2007) on the DIGITAL board.

2.  While pressing the [TONE MODE] and [MUSIC] buttons, 

press the [

?/1

] button to turn on the main power.

3.  The message “DMPORT T.” appears on the fl uorescent indica-

tor tube and enter the digital media port test mode. (Confi rma-
tion of communication line)

 

When “NO DETECT”, “UART NG” and “UART TO” are dis-
played on the fl uorescent indicator tube, confi rm the connec-
tion of the DMPORT check jig, and enter the mode again.

  Each time the [>] button on the remote commander is 

pressed, the connect check and adaptor version check are 
switched.

 

Press the [.] button on the remote commander, connected 
confi rmation of the DMPORT check jig is done again.

4.  To a pin-jack of the DMPORT check jig input information 

relevant to audio signal (sine-wave 1.0 Vrms) and composite 
video signal. (white 100% 1.0 Vp-p, color bar, etc.)

5. Confi rm the output of speakers and monitor TV. (Confi rmation 

of analog signal)

6.  To release from this mode, press the [x] button on the remote 

commander. 

 

FLUORESCENT  INDICATOR  TUBE  PATTERN CHECK  
MODE
All fl uorescent segments are tested. When this test is activated, all 
segments turn on at the same time, then each segment turns on one 
after another.
Procedure:
1.  While pressing the [DISPLAY] and [DIMMER] buttons, press 

the [

?/1

] button to turn on the main power.

2.  All segments and all LEDs turn on. Each time [DISPLAY] but-

ton to change as follows all on, test pattern 1, test pattern 2, all 
off, all on in this order.

MEMORY  CLEARING  MODE
All preset contents are cleared when this mode is activated. Use 
this mode before returning the product to clients upon completion 
of repair.
Procedure:
1.  While pressing the [TONE MODE] and [MUTING] 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.

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 pressing the [MUSIC] button, press the [

?/1

] button to 

turn on the main power.

2.  The message “S. F. CLEAR” appears and initialization is per-

formed.

TUNER  AM  STEP  CHANGE  MODE 
(US, Canadian, Australian, Taiwan and Thai 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] dial to select the “AM TUNER”.
3.  Press the [POWER] 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 “AM9k Step” or “AM10k Step” appears, se-

lect the desired step.

HISTORY  MODE
The state that the set is used is memorized.
Procedure:
1.  While pressing the [INPUT MODE] and [MUSIC] buttons, 

press the [POWER] button to turn on the power and “HIS-
TORY” is displayed.

2. Each 

time 

the 

[M]/[m] buttons of remote commander is pressed, 

the item is switched in order as follows.

Protector count

COUNT  xx

Total single power on time

S xxxxxHxxM

Sound fi eld

xxxxxxxxxx

Input function

xxxxxxxxxx

Input mode

xxxxxxxxxx

Digital select

xxxxxxxxxx

Stream information

xxxxxxxxxx

Signal confi guration

CONF xxxxx

Headphones

HEADPH xxx

Volume

VOL  xx

Bass

BASS  xxxdB

Treble

TREB  xxxdB

Level FL/FR

FL/R xxxxx

Level SL/SR

SL/R xxxxx

Level CT/SW

C/SW xxxxx

Level BL/BR

BL/R xxxxx

Total power on time

T   xxxHxxM

Muting

MUTING xxx

Power on counter 
(Rebox test mode)

REBOX   xx

Protector type

PROT  xxxx

Temperature record

TEMP  xxxxc

SOFTWARE  VERSION  CHECK
Procedure:
1.  While pressing the [TONE MODE] and [DISPLAY] buttons, 

press the [

?/1

] button to turn on the main power.

2.  The message “H8 ** Mx.xx” appears. This is main micro-pro-

cessor version. 

 

**: destination, x.xx: software version

3.  Press the [DISPLAY] button on the remote commander, HDMI 

micro-processor version or DSP fi rmware version is changed. 

 

HDMI micro-processor version “H. Ver x.xx” appears. 

 DSP 

fi rmware version “S.Ver x.xx” appears.

PROTECTOR  OFF  MODE
This mode switching on/off the protector to investigate the cause 
of the protector.
Procedure:
1.  While pressing the [INPUT MODE] and [A.F.D.] buttons, 

press the [

?/1

] button to turn on the main power.

2.  Either the message “PROT ON” or “PROT OFF” appears.