SCD-XB940 (serv.man2) - Sony Audio Service Manual (repair manual). Page 3

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3
“Check F0” 
→
 “EEPROM OK” 
→
  “2. EEPROM”
(4) 3. HGA
From the “SELF DIAG Menu” display, rotate 
[       AMS       ]
controller clockwise to select “3. HGA” and press 
[        AMS        ]
controller.
Then, “HGA Start” 
→
 “HGA OK” 
→
 “3. HGA” will be displayed
and the check will finish.
(5) 4. Servo DSP
From the “SELF DIAG Menu” display, rotate 
[       AMS       ]
controller clockwise to select “4. Servo DSP” and press
[       AMS       ]
 controller.
Then, “SDSP Start” 
→
 “SDSP OK” 
→
 “4. Servo DSP” will be
displayed and the check will finish.
(6) 5. ARP Check
From the “SELF DIAG Menu” display, rotate 
[       AMS       ]
controller clockwise to select “5. ARP”.
• Checking items
DISPLAY
Contents of Check
0. All Check
Check of all items 1. – 4.
1. ARP Register
ARP register check
2. ARP Data
ARP data check
3. ARP Address
ARP address check
4. ARP DRAM
ARM DRAM check
1
1. ARP Register
From the “5. ARP” display, press 
[       AMS       ]
 controller, and
then “1. ARP Register” will be displayed.
Press 
[       AMS       ]
 controller once more, and then “ARP Reg
Start” 
→
 “ARP Reg OK” will be displayed and the check will
finish.
2
2. ARP Data
From the “1. ARP Register” display, rotate 
[       AMS       ] 
con-
troller clockwise to select “2. ARP Data”.
Press 
[       AMS       ]
 controller, and then “ARP DBus Start” 
→
“ARP DBus OK” 
→
  “2. ARP Data” will be displayed and the
check will finish.
3
3. ARP Address
From the “1. ARP Register” display, rotate 
[       AMS       ] 
con-
troller clockwise to select “3. ARP Address”.
Press 
[       AMS       ]
 controller, and then “ARP ABus Start” 
→
“ARP ABus OK” 
→
 “3. ARP Address” will be displayed and the
check will finish.
4
4. ARP DRAM
From the “1. ARP Register” display, rotate 
[       AMS       ]
 con-
troller clockwise to select “4. ARP DRAM”.
Press 
[       AMS       ]
 controller, and then “ARP DRAM Start” 
→
“Wait ...” 
→
 “ARP DRAM OK” 
→
 “4. ARP DRAM” will be dis-
played and the check will finish.
5
0. All Check
From the “1. ARP Register” display, rotate 
[       AMS       ]
 con-
troller counterclockwise to select “0. All Check”.
Press 
[       AMS       ]
 controller, and then the following will be
displayed and the check will finish.
“ARP Register” 
→
 “ARP Reg Start” 
→
 “ARP Reg OK” 
→
 “ARP
Data” 
→
 “ARP DBus Start” 
→
 “ARP DBus OK” 
→
 “ARP Ad-
dress” 
→
 “ARP ABus Start” 
→
 “ARP ABus OK” 
→
 “ARP DRAM”
→
 “ARP DRAM Start” 
→
 “Wait ...” 
→
 “ARP DRAM OK” 
→
“Diag Success” 
→
 “0. All Check”
(7) 6. SACD Chip
From the “SELF DIAG Menu” display, rotate 
[       AMS       ]
controller clockwise to select “6. SACD Chip”.
• Checking items
DISPLAY
Contents of Check
0. All Check
Check of all items 1. and 2.
1. DSD Chp Bus
Check presence of error in SACD DSD
Chp Bus
2. DSD Chp DRAM
Check presence of error in SACD DSD
Chp DRAM
1
1. DSD Chp Bus
From the “6. SACD Chip” display, press 
[       AMS       ]
 controller,
and then “1. DSD Chp Bus” will be displayed.
Press 
[       AMS       ]
 controller once more, and then “DSD Bus
Start” 
→
  “DSD Bus OK” 
→
  “1. DSD Chp Bus” will be dis-
played and the check will finish.
2
2. DSD Chp DRAM
From the “1. DSD Chp Bus” display, rotate 
[       AMS       ]
 con-
troller clockwise to select “2. DSD Chp DRAM”.
Press 
[       AMS       ]
 controller, and then “DSD DRAM Start” 
→
“Wait ...” 
→
  “DSD DRAM OK” 
→
  “DSD Chp DRAM” will be
displayed and the check will finish.
3
0. All Check
From the “1. DSD Chp Bus” display, rotate 
[       AMS       ]
 con-
troller counterclockwise to select “0. All Check”.
Press 
[       AMS       ]
 controller, and then the following will be
displayed and the check will finish.
“DSD Chp Bus” 
→
  “DSD Bus Start” 
→
  “DSD Bus OK” 
→
“DSD Chp DRAM” 
→
  “DSD DRAM Start” 
→
  “Wait ...” 
→
“DSD DRAM OK” 
→
  “Diag Success” 
→
  “0. All Check”
(8) 7. SDBus
From the “SELF DIAG Menu” display, rotate 
[       AMS       ]
controller clockwise to select “7. SDBus”.
Press 
[       AMS       ]
 controller, and then “SDBus Start”  
→
“Wait ...”  
→
  “SDBus OK” 
→
 “7. SDBus” will be displayed and
the check will finish.
(9) 8. Diag Hist
From the “SELF DIAG Menu” display, rotate 
[       AMS       ]
controller clockwise to select “8. Diag Hist”.
Press 
[       AMS       ]
 controller, and then “1.” will be displayed,
and as the 
[       AMS       ]
 controller is rotated clockwise, “2.” –
“10.” will be displayed.

1. Auto Adjust Menu
From the “Test Mode Menu”, rotate  
[       AMS       ]
 controller
clockwise to select “1. Auto Adjust”.
Press 
[       AMS       ]
 controller, and then “Auto Adj Menu” will
be displayed, where you can select the following menu by rotating
the 
[       AMS       ]
 controller.
DISPLAY
Contents of Adjustment
0. All (Adjust)
Adjustment of all items 1. – 3.
1. SACD-SL
SACD-SL adjustment
2. CD
CD adjustment
3. SACD-DL
SACD-DL adjustment
4. HYBRID
HYBRID adjustment
5. All-Adj LFO
Adjustment of all items 1. – 3. with
LFO value
6. Memory Check
Memory check
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