Sony dvp-s3000 Service Manual page 33

(4-3) Drvcon common RAM (IC138) check
IC093 (Syscon ROM) n IC138 (common RAM) collating check
Checking range: 0x03000001 - 0x03000fff
After confirming that the RAM areas common to Drvcon are not
occupied by Drvcon (namely, the contents of common RAM ad-
dresses are true), the IC093 (Syscon RAM) codes are copied to the
IC138 (common RAM) areas from address 1, then the data are read
for checking. If all are same, the IC093 code bits are inverted and
checked again. If compared data are not same, a checking is sus-
pended, and error code 05, its address, written data, and read data
are displayed.
After checking, reset the Drvcon because irregular values are writ-
ten to the IC138.
If common RAM areas are occupied by Drvcon and they are not
opened even after about 2 seconds, the write error 03 is output.
(4-4) Drvcon data exchange check
IC090 (Syscon) n IC136 (Drvcon), IC136 (Drvcon) n IC090
(Syscon) command path check
The path check command is sent from IC090 (Syscon) to IC136
(Drvcon), and as a result, whether the data same as sent data is
returned to the IC138 (common RAM) is checked. In the Syscon
Diagnosis, only the ROM revision is displayed. If no response is
returned from Drvcon or the data are not same, the error code 73 is
output.
(4-5) Drvcon interrupt line check
IC136 (Drvcon) n IC090 (Syscon), IC090 (Syscon) n IC136
(Drvcon) interrupt line check
If CXD8663Q check command is sent from IC090 to IC136, the
IC136 returns IC181 (CXD8663Q) register read/write command.
Receiving this command, the IC090 outputs a response signal im-
plying that the interrupt signal was received, then the IC136 con-
firms this signal input and writes the Command Done to the IC138
(common RAM).
When the Command Done is not returned even after 1 second, the
error code 70 (DRV INT is not detected) is output if the interrupt
signal has not been received, or the error code 71 (Drvcon does not
recognize SYS INT) is output if the interrupt signal has been re-
ceived.
Also, upon detection of an error in IC181 (CXD8663Q) by this
command, the error code 30 is output.
If DRV INT signal is kept "low", the Syscon repeats an interrupt
processing continuously, thus making error display impossible. For
this reason, only for this command, the Drvcon returns the DRV
INT signal to "high" even if SYS INT is not detected. (The Syscon
makes judgment whether Command Done is returned or not.)
Here, if the Syscon makes no response, the DRV INT signal itself
will be faulty.
(4-6) Drvcon SRAM check
IC090 (Syscon) n IC136 (Drvcon) check request command
The SRAM check command is sent from IC090 to IC136, and its
response result is displayed.
In case of an error, the error information of Drvcon is read, then the
error code 05, error address, written data, and read data are dis-
played.
(4-7) EEPROM check
IC090 (Syscon) n IC136 (Drvcon) check request command
The EEPROM check command is sent from IC090 to IC136, and
its response result is displayed.
The error code 74 when IC139 (EEPROM) write signal is not ready,
or error code 05 when written data and read data are not same, error
address, written data, and read data are displayed.
(4-8) RF Processor check
IC090 (Syscon) n IC136 (Drvcon) check request command
The RF processor check command is sent from IC090 to IC136,
and its response result is displayed.
In case of an error in IC770 (RF processor), the error code 76 is
output.
(4-9) CXD2545 RAM check
The CXD2545 check command is sent from IC090 to IC136, and
its response result is displayed.
In case of an error in IC717 (CXD2545), the error code 75 is out-
put.
(4-10) Drvcon ROM check
IC090 n IC136 check request command
The EPROM check command is sent from IC090 to IC136.
The Drvcon calculates checksum of IC140 (EPROM), and returns
its result and the checksum value is displayed, if there is no error.
Compare the result displayed on the screen with the checksum of
original EPROM.
(4-11) VCO offset automatic adjustment
IC090 n IC136 check request command
The VCO offset automatic adjust command is sent from IC090 to
IC136.
If automatic adjustment failed, the error code 77 is output.
(5) Data supply system
(5-2) IC217 (CXD8598R) reset check
Write to register n Hard reset n Read from register
Registers to be checked: TSC2 (0x06200011)
Data other than 0 are written to readable and writable registers in
IC217 (CXD8598R), and they are read after hard reset, then the
error code 02 is output if they are not cleared to 0.
6-3
TSC1 (0x06200012)
TSC0 (0x06200013)