STR-DH520 - Sony Audio Service Manual (repair manual). Page 10

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STR-DH520
10
SPDIF UPDATE MODE
User plays the CD that contains u-com/DSP data with CD/DVD 
player.
Update u-com/DSP etc. fi rmware from SPDIF input.
Connection:
CD/DVD
player
DIGITAL board
BD/DVD COAXIAL IN jack (J2301)
set
* Procedure:
Normal case
1.  While pressing [INPUT MODE] and [MUTING] button, 
press the [?/1] button to turn on the main power.
2.  The messages “UPDATE” and “PLAY. DISC” are displayed 
alternately every one second. 
After this step, all user operation is prohibited except power 
off. To cancel this mode, power off or AC power cord pull out 
is required.
3.  Connect CD player to BD/DVD COAXIAL IN jack (J2301 
on DIGITAL board), and play update CD. 
Update is started when DSP detect update signal. The 
message “UPDATING” is displayed blinks every one second. 
From this step, all user operation is prohibited. Power off is 
also prohibited.
4.  While main u-com is being updated, fl uorescent indicator tube 
is blacked out for few minutes.
5.  When update data error is detected or disc is not matched with 
target model, error messages “DISC ERR” and “PLAY. DISC” 
are displayed to restart playing valid CD. 
When fl ash writing error is happened, error messages “UPT.
ERR” and “PLAY. DISC” are displayed to restart playing CD.
6.  When all update is fi nished, set is reboot automatically. 
After reboot, complete message “COMPLETE” is displayed 
(displayed continuously until any user operation).
* Procedure:
After update is abnormal exit, and set is power on again
1.  Enter update mode automatically after power on.
2.  The messages “UPDATE” and “PLAY. DISC” are displayed 
alternately every one second. 
From this step, all user operation is prohibited. Power off is 
also prohibited. 
If main u-com was failed to update, nothing is displayed.
3.  Connect CD player to BD/DVD COAXIAL IN jack (J2301 
on DIGITAL board), and play update CD. 
Update is started when DSP detect update signal. From this, 
same as normal case.
SPDIF UPDATE VERSION
Function that displays the version number to check whether 
SPDIF update is necessary or not.
* Procedure:
1.  While pressing [INPUT MODE] and [DISPLAY] button, 
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. + 7)/10 = 
Displayed version 
MAIN = 1.02, DSP = 1.01, HDMI = 1.00 
↓ 
(1.02 + 1.01 + 1.00 + 1.03 + 7)/10 = 1.006 
1.006 = X.XXX
SPDIF UPDATE TEST
Function that checks hardware error for SPDIF update.
This test takes about 15 seconds.
* Procedure:
1.  While pressing [INPUT MODE] and [DIMMER] buttons, 
press the [?/1] button to turn on the main power.
2.  The message “TESTING” is displayed.
3.  When abnormality is not found, the message “COMPLETE” 
will display.
4.  Communication error between others devices micro-controller 
and DSP, the messages “UART” and “ERROR” are displayed. 
Communication error between HDMI microcomputer and 
DSP, the messages “HDMI” and “ERROR” are displayed. 
Communication error between MAIN MICOM and DSP, the 
messages “VIDEO” and “ERROR” are displayed. 
Unknown error, the messages “UNKNOWN” and “ERROR” 
are displayed.
5.  To release from this mode, AC power cord pull out.
HISTORY MODE
* The state that the set is used is memorized.
* Procedure:
1.  While depressing the [INPUT MODE] and the [MUSIC] 
buttons simultaneously, press the [
?/1
] button to turn on the 
main power.
2. “HISTORY” 
appears.
3. Each time the [↑] / [↓] buttons on the remote commander is 
pressed, the item is switched in order as follows.
Items
Display
Protector Count
COUNT XX
Total Single Power On Time
XXXXXHXX01
Sound Field
SND FLD
Input Function
FUNCTION
Input Mode
INP MODE
Digital Select
DIG IN 
Stream Information
 STREAM
Signal Confi guration
CO XXXXX
Headphone
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
XXXXXHXX02
Muting
MUTE XXX
Power ON Counter  
(Rebox Test Mode)
REBX.XXXX
Protector Type
PROTXXXX
Temperature Record
TEM XXXX
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