Sony DNW-A75 Maintenance Manual page 129

C23 : AUDIO TEST SG
AUDIO/VIDEO CHECK MODE
C23:AUDIO TEST SG
*
OFF
This menu selects the operation in the maintenance mode
of an audio test signal generator incorporated in this unit.
OFF: The audio test signal generator operation
stops.
Except OFF: An audio test signal generator outputs the
selected signals (below).
Silence
1 kHz sine 0 VU
1 kHz sine burst/1 field
1 kHz sine burst/2 field
1 kHz sine burst/5 field
1 kHz sine burst/8 field
1 kHz sine burst(10)
4 kHz sine burst(40)
Saw wave
Setting of audio test signal generator
To set the audio test signal generator, turn the search dial
while pressing the JOG button and display the desired
setting.
This setting is valid until the maintenance mode is termi-
nated.
m
. This menu is set to OFF when the maintenance mode is
activated.
. The output signal of a test signal generator can also be
recorded on the tape. In this case, press the SET button
to display the white square in the upper-right position of
the superimposed display, before recording.
DNW-A75/A75P
C24 : DPR-118 DIAG INFO
AUDIO/VIDEO CHECK MODE
C24:DPR-118 DIAG INFO
DPR-118 DIAG. OK!
This function informs the result of the self-diagnosis of the
DPR-118 board in this unit.
When a failure occurs on the DPR-118 board, this function
guess the default IC but do not specified.
n
"ERROR" may be displayed as the diagnosis result even if
the boards except DPR-118 are defective.
An initialize check and something check are available as
the self-diagnosis function.
. In the initialize check, check the communication of the
communication bus (PAD0-7, STAT0-1, STRB, and CS)
between SY2 CPU on the SS-83 board and each IC on
the DPR-118 board.
Initialization data is transferred from SY2 CPU to each IC.
After that, the initialization data set in each IC is read and
compared with the initialization data transferred at first.
. In the something check, a parity check and external
memory check are performed for the input signals of the
following ICs, and the result of the self-diagnosis of each
IC is displayed by reading from SY2 CPU.
Target IC for the diagnosis
No. Screen display
1, 11 F-CONT
2, 12 DIGI FIL
3, 13 SX ENC
4, 14 SX MEP
5, 15 ECC ENC
6, 16 OUTER
7, 17 SX DEC
To display the self-diagnosis function result
(1) Select the C24 : DPR-118 DIAG INFO menu.
(2) To scroll the screen, turn the JOG dial.
Downward: Turn it in REVERSE (3) direction.
Upward: Turn it in FORWARD (2) direction.
(3) Press the MENU button to terminate the menu after
checking the self-diagnosis result.
4-2. TAPE Maintenance Mode (M0)
4-2-5. AUDIO/VIDEO CHECK Mode (C2)
Target IC Ref. No. (IC name)
IC251 (CXD8997R)
IC209 (CXD9025R)
IC200 (CXD8973BR)
IC300 (CXD8974AR)
IC402 (CXD8946Q)
IC600 (CXD8945BR)
IC800 (CXD9012AR)
4-39