Sony DVP-NS400D Service Manual page 75

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Submenu
Selecting 2 and subsequent items calls the submenu screen of each
item.
For example, if "5. Supply" is selected, the following submenu
will be displayed.
### Syscon Diagnosis ###
Check Menu
No. 5 Supply
0. Quit
1. All
2. ARP Register Check
3. ARP to RAM Data Bus
4. ARP to RAM Address Bus
5. ARP RAM Check
_
0. Quit
Quit the submenu and return to the main menu.
1. All
All submenu items continuous check.
This menu checks 2 and subsequent items successively. At the item
where visual check is required for judgment or an error occurred,
the checking is suspended and the message is output for key entry.
Normally, all items are checked successively one after another au-
tomatically unless an error is found.
Selecting 2 and subsequent items executes respective menus and
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L 13942296513
outputs the results.
For the contents of each submenu, see "General Description of
Checking Method" and "Check Items List".
General Description of Checking Method
2. Version
(2-2) Revision
ROM revision number is displayed.
Error: Not detected.
The revision number defined in the source file of ROM
(IC107) is displayed with four digits.
(2-3) ROM Check Sum
Check sum is calculated.
Error: Not detected.
8-bit data are added up to the ROM (IC107) address
0x000F0000 to 0x002EFFFF, and the result is displayed
with 4-digit hexadecimal number. Error is not detected.
Compare the result with the specified value.
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(2-4) Model Type
Model code is displayed.
Error: Not detected.
The model code read from the EEPROM is displayed with
2-digit hexadecimal number.
US, CND
AR, E, MX
AEP (DPX1411BM, DPX1411HM), UK
AEP (DPX1412BM, DPX1412HM)
BR
• Abbreviation
AR : Argentina
BR : Brazilian
CND : Canadian
MX : Mexican
• Description about model name
DPX14xxBM
Color of set
B : Black
H : Titanium gray
(2-5) Region
Region code is displayed.
Error: Not detected.
The region code determined from the model code is dis-
played.
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(2-6) AD 3 PORT Check
AD 3 PORT status is displayed.
Error: Not detected.
Which status, High (Pull Up), NC (Non Connect), or Low
(Pull Down), the AD 3 PORT is placed in now is checked.
3. Peripheral
(3-2) Gate Array Check
Data write → read, and accord check
Error 02: Gate array write/read discord
Data of 0x00 to 0xFF is written sequentially to the address
0xF and then read for checking.
(3-3) EEPROM Check
Data write → read, and accord check
Error 03: EEPROM write/read discord
0x9249, 0x2942 and 0x4294 are written to the address 0x00
to 0xFF of the EEPROM and then read for checking. Be-
fore writing, the data are saved, then after checking, they
are written to restore the contents of EEPROM.
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6-2
9 4 2 8
Model Type
1 0
1 2
1 3
1 4
1 6
0 5 8 2 9 9 4 2 8
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9 9
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