Sony DVP-C660 Service Ma page 82

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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
(IC104) is displayed with four digits.
(2-3) ROM Check Sum
Check sum is calculated.
Error: Not detected.
The data are added of ROM (IC104) and the result is dis-
played with 4-digit hexadecimal number. Error is not de-
tected. 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-
TE
L 13942296513
ber.
DVP-C660 (US/CND)
DVP-C670D (US/CND), DVP-C675D (PX)
DVP-C670D (E)
DVP-C670D (AUS)
• Abbreviation
CND: Canadian AUS: Australia
(2-5) Region
Region code is displayed.
Error: Not detected.
The region code determined from the model code is dis-
played.
US, Canadian and PX models: 01
Australian and E models
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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.
(3-3) Gate Array Check
Data write → read, and accord check
Error 02: Gate array write/read discord
(3-4) NAND Flash Check
Data clear → write → read, and accord check
Error 04: Clear error
05: Write error
06: Read data discord
21: Faulty blocks exceed 10
The data clear, write, read, and check are executed to the
block 0 of Flash memory (IC802).
In case of a faulty block, its address is displayed.
4. Servo
(4-2) Servo DSP Check
Data write → read, and accord check
Error 12: Read data discord
(4-3) DSP Driver Test
Test signal data → DSP Driver
Error: Not detected.
5. Supply
Q Q
3 6 7 1 3 1 5
Caution: Do not conduct this check with a mechanical deck con-
nected.
An access is made to the stream supply and servo control
IC (IC302) and external RAM (IC303) 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 flexible flat cables connected to the
CN404 and CN405 of MB-87 board.
(5-2) ARP Register Check
Data write → read, and accord check
Error 08: ARP register write, and read data discord
(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 (IC303) connected to the
ARP (IC302) 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.
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