DVP-S9, MHC-S9D - Sony Audio Service Manual (repair manual). Page 13

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13
DVP-S9
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
outputs the results.
For the contents of each submenu, see “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 (At
the beginning of mass production, the Flash ROM of IC107
is used) is displayed with four digits.
(2-3) ROM Check Sum
Check sum is calculated.
Error: Not detected.
The 8-bit data are added at addresses 0x000F0000 ~
0x002EFFFF of ROM (IC107) and the result is displayed
with 4-digit hexadecimal number. Error is not detected.
Compare the result with the specified value.
(2-4) Model Type
Model code is displayed.
Error: Not detected.
The model code read from EEPROM (IC101) is displayed
with 2-digit hexadecimal number.
(2-5) Region
Region code is displayed.
Error: Not detected.
The region code determined from the model code is displayed.
3.
Peripheral
(3-2) EEPROM Check
Data write 
→ read, and accord check
Error 03: EEPROM write/read discord
Data 0x9249, 0x2942, 0x4294 are written to addresses
0x00~0xFF of EEPROM (IC101), then read and checked.
Before writing, the data are saved, then after checking, they
are written to restore the contents of EEPROM.
4.
Servo
(4-2) Servo DSP Check
Data write 
→ read, and accord check
Error 12: Read data discord
Data 0x9249, 0x2942, 0x4294 are written to the address
0x602 of RAM in the Servo DSP (IC302), then read and
checked.
(4-3) DSP Driver Test
Test signal data 
→ DSP Driver
Error: Not detected.
Caution: Do not conduct this test with a mechanical deck
connected.
The maximum voltage is applied to the Servo Driver IC
(IC401). If mechanical deck is connected, the motor and
optics could be damaged. Disconnect mechanical deck fol-
lowing the output message, then enter specified 4- or 5-
digit number from the remote commander, and press the
[ENTER]
. The test is conducted only when the input data
accord. Check the output level, then press the
>
to fin-
ish the test.
This test is skipped if “All” is selected.
Supplement: How to disconnect mechanical deck
Disconnect flat cables connected to the CN010 and CN015
of MB board. Also, disconnect harness from the CN203.
Ver 1.6
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