Outline; Debug Mode; Service Mode; Expansion Key Function - Sony MDP-V10 Service Manual

1. OUTLINE

1-1. Debug Mode

The "Debug Mode" is a state in which the function (debug func-
tion) which displays microprocessor RAM information on the screen
can be used.
This mode differs from the normal mode as follows.
1) The Fluorescent tube goes off when the commands of this mode
are effective.
2) When the key of the remote control is pressed in the state of 1),
debug information such as emergency history, etc., can be dis-
played. During this time, only some keys will be effective.

1-2. Service Mode

The "Service Mode" is a state in which the function (service func-
tion) which facilitates repairs and inspections can be used.
This mode differs from the normal mode as follows.
1) Special operations such as focus search, sled forwarding, etc.
can be performed.
2) The power will not go off automatically even when emergencies
which turn off the power occur.
3) When this mode is set, the debug mode will also be set auto-
matically.

1-3. Expansion Key Function

The "Expansion Key Function" is the function which operates when
several keys of the unit or remote control are pressed simultaneously
for tests, etc. according to a set of procedures.
This function can be used in the service mode, debug mode, and in
normal operations.
This function consists of the "Unit Key Simultaneous Pressing Func-
tion" used by pressing several keys of the unit simultaneously and
the "Unit Key+Remote Control Key Simultaneous Pressing Func-
tion" used by pressing the unit key together with a key of the re-
mote control twice.
2. DEBUG MODE

2-1. Setting the Debug Mode

To set the debug mode from the normal mode (normal state), press
the [10/0] key and then the [STOP] key of the remote control while
pressing the [STOP] key of the unit with the power on.
The following screen should be displayed.
This screen shows the microprocessor version. For details, refer to
"2-4-1. Microprocessor Version".
So as to valid the debugging commands at the debugging mode,
press the [10/0] key and then the [8] key of the remote control while
pressing the [STOP] key of the unit. And the Fluorescent tube will
be off while debug commands are effective.
So as to invalid the debugging commands at the debugging mode,
press the [10/0] key and then [9] key of the remote control while
pressing the [STOP] key of the unit. The Fluorescent tube will be
on while debugging commands are not effective.
1 2 3 4 5 6 7 8 9 101 2 3 4 5 6 7 8 9 201 2 3 4
1st line
V E R
2nd line
3rd line M M I - 1 1 5 1 A
4th line
5th line V F D - 1 1 5 1 A
6th line
M C M - 9 6 2 B
7th line
8th line
9th line
10th line
Fig. 9-1. Debug Mode Initial Screen

2-2. Exiting the Debug Mode

To return to the normal mode from the debug mode, press the
[CLEAR] key of the remote control at the screen shown in Fig. 9-2.
(Microprocessor Version Screen), which should be effective the
debugging commands.

2-3. Switching the Screen Display

When the debug mode is set, the screen will display the "Debug
Screen".
Press the [DISPLAY] key will switch it to the display format as in
the normal mode.
In the debug mode, the display format can be selected from "No-
Display" (normally nothing is displayed), "Small Display" (only
the first line displayed)", "Large Display" (the whole screen is dis-
played constantly), and "Debug-Display".
When the [DISPLAY] key is pressed in the normal mode, the dis-
play will be switched as follows.
nNo DisplaynSmall DisplaynLarge Displayn
In the debug mode, it will be switched as follows
No Small
n n
Display Display
9-2
S T O P
0 3 / 3 1 A
0 2 / 1 7 A
9 6 0 6 1 9 6 2
Large Debug
n n n
Display Display