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D-VM1
### 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
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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
automatically unless an error is found. Selecting 2 and subsequent
items execute respective menus and output 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
(IC1105) is displayed with four digits.
(2-3) ROM Checksum
Checksum is calculated.
Error : Not detected.
The data stored in the ROM (IC1105) are added and the re-
sult 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 is displayed with 2-digit hexadecimal num-
ber.
Model
D-VM1 (HK)
D-VM1 (JE)
(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
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
12
Type
9
7
9
7
(4-3) DSP Driver Test
Test signal data → DSP Driver
Error : Not detected.
5. Supply
Caution : Do not conduct this check with a mechanical deck connected.
An access is made to the stream supply and servo control IC
(IC1002) and external RAM (IC1003) using check data. If
mechanical deck is connected, the motor and optics could be
damaged. This check is also executed by the "All" menu item.
Supplement : How to disconnect mechanical deck
Disconnect flat cables connected to the CN601 and CN1601
of MAIN board.
(5-2) ARP Register Check
Data write → read, and accord check
Error 08 : ARP register write, and read data disaccord
(5-3) ARP to RAM Data Bus
Data write → read, and accord check
Error 09: ARP ← → RAM data bus error
Data 0x0001 to 0x8000 where one bit each is set to 1 are
written to the address 0 of RAM (IC1003) connected to the
ARP (IC1002) through the bus, then they are read and
checked. In case of discord, written bit pattern and read data
are displayed. If data where multiple bits are 1 are read, the
bits concerned may touch each other. Further, if data where
certain bit is always 1 or 0 regardless of written data, the line
could be disconnected or shorted.
(5-4) ARP to RAM address Bus
Data write → other address read discord check
Error 10: ARP ← → RAM address bus error
Caution : Address and data display in case of an error is different from
the display of other diagnosis (described later). Before start-
ing the test, all addresses of RAM (IC1003) are cleared to
0x0000. First, 0xA55A is written to the address 0x00000, and
the address data are read and checked from addresses 0x00001
to 0x80000 while shifting 1 bit each. Next, the data at that
address is cleared, and it is written to the address 0x00001,
and read and checked in the same manner. This check is re-
peated up to the address 0x80000 while shifting the address
data by 1 bit each.
If data other than 0 is read at the addresses except written
address, an error is given because all addresses were already
cleared to 0. In this check, the error display pattern is differ-
ent from that of other diagnosis; read data, written address,
and read address are displayed in this order. However, the
message uses same template, and accordingly exchange Ad-
dress and Data when reading. The following display, for ex-
ample, shows the data 0xA55A was read from address
0x00080000 though it was written to the address 0x00000000.
This implies that these addresses are in the form of shadow.
Also, if the read data is not 0xA55A, another error will be
present.
### Syscon Diagnosis ###
5-4. ARP to RAM Address Bus
Error 10: ARP - RAM Address B
Address
: 0000A55A
Write Data : 00000000
Read Data : 00080000
Press NEXT Key to Continue
Press PREV Key to Repeat
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