Sony dvp-s3000 Service Manual page 37

(8-2) Video encoder check (color bar output)
The color bar is turned on for the NTSC encoder color bar enable
command IC475 (NTSC encoder).
In this check, the Syscon itself does not detect an error.
Confirm the video display screen.
(8-3) Video output check
IC093 (ROM) n IC216 (CXD1186) n IC217 (CXD8598R) n
IC281 (CXD1900BQ) n Video signal output
The bit stream data of still picture stored in IC093 (ROM) are trans-
ferred to the IC215 (SRAM of IC216), then the picture is displayed
on the video screen by flowing data to the IC281 (CXD1900BQ)
via IC217 (CXD8598R). If an error is present in any path, that code
is output and a checking is finished.
If no error is found, the controller waits for key entry.
Check the video display screen.
(8-4) IC310 (CXD8602Q) check (letter box output)
IC093 (ROM) n IC216 (CXD1186) n IC217 (CXD8598R) n
IC281 (CXD1900BQ) n IC310 (CXD8602Q) n Video signal
output
The bit stream data of still picture stored in IC093 (ROM) are trans-
ferred to the IC215 (SRAM of IC216), then the picture is displayed
on the video screen by flowing data to the IC281 (CXD1900BQ)
via IC217 (CXD8598R). In such a case, the letter box on command
is output on the IC310 (CXD8602Q).
If no error is found, the controller waits for key entry.
Check the video display screen.
(8-5) Video equalizer check (brightness control)
IC093 (ROM) n IC216 (CXD1186) n IC217 (CXD8598R) n
IC281 (CXD1900BQ) n IC317 (CXD8664Q) n Video signal
output
The bit stream data of still picture stored in IC093 (ROM) are trans-
ferred to the IC215 (SRAM of IC216), then the picture is displayed
on the video screen by flowing data to the IC281 (CXD1900BQ)
via IC217 (CXD8598R).
If no error is found, the brightness change command is sent to the
IC317 (CXD8664Q). The controller waits for key entry after chang-
ing the brightness twice.
Confirm that the brightness of video display screen changes.
(8-6) Subpicture output check
IC093 (ROM) n IC181 (CXD8663Q) n IC217 (CXD8598R)
n IC312 (CXD8600R) n Video signal output
The bit stream data including subpicture stored in IC093 (ROM)
are transferred to the IC312 (CXD8600R) via IC181 (CXD8663Q)
and IC217 (CXD8598R), and the picture is displayed on the video
screen unless an error is found.
Check the video display screen.
(8-7) S-terminal output check (0V)
I/O output
Make S-terminal output potential 0V.
In this check, the Syscon itself does not detect an error.
Observe the potential at the S-terminal with an instrument.
(8-8) S-terminal output check (5V)
I/O output
Make S-terminal output potential 5V.
In this check, the Syscon itself does not detect an error.
Observe the potential at the S-terminal with an instrument.
(8-9) S-terminal output check (2.5V)
(9) Audio Related
(9-2) IC380 (CXD8603R) reset check
Write to register n Hard reset n Read from register
Register to be checked: RAADRS (0x06100004)
Data other than 0 are written to readable and writable register in
IC380 (CXD8603R), and they are read after hard reset, then the
error code 02 is output if they are not cleared to 0.
Though this register has 16-bit length, MSB is always 0.
(9-3) IC380 (CXD8603R) register check
Register write n Register read collating check
Register to be checked: RAADRS (0x06100004)
Incrementing 1 each starting from 0, data are written to readable
and writable register, then they are read for checking. Incrementing
initial value by 1 each, a check is repeated 32768 times.
If compared data are not same, a checking is suspended, and error
code 05, its address, written data, and read data are displayed. Be-
cause of 16-bit length, 4-digit data is displayed (however, MSB is
always 0).
(9-4) IC380 (CXD8603R) SRAM check
IC093 (ROM) n IC380 (CXD8603R) n IC383 (SRAM) n
IC380 read collating check
Checking range: 0x00000000 - 0x00007fff
IC093 (ROM) pattern is copied to all areas to be checked. Each
time 256 bytes are copied, 255 bytes of original (IC093) address
are returned. A reading check is made after data are written to all
areas.
The data write/read to IC383 (SRAM) are executed every 256 bytes
using the direct access function of the IC380 (CXD8603R). If com-
pared data are not same, a checking is
suspended, and error code 05, its address, written data, and read
data are displayed.
(9-5) IC217 (CXD8598R) to IC380 (CXD8603R) connection check
6-7