Sony DVP-F11 Service Manual page 76

4. DESCRIPTION OF IF CON FUNCTION CHECK
MODE
1. Button Function
In the Test mode, press any button (except
the set. This operation terminates the automatic display test mode
of the FL display tube. During the time that the button is pressed,
the function name of the pressed button is displayed on the FL
display tube, and "NOTHING" is displayed if releasing the but-
ton. For the button names displayed, refer to the following table.
For the illuminated button (LED built in), it turns on and off alter-
nately each time it is pressed. For the multi-channel LED (blue
LED), it blinks when the "RETURN" button is pressed because
its dedicated button is not provided.
Input Voltage [V]
1 0
2 0.65
3 1.24
4 1.88
5 2.41
The direction buttons are used to enter special modes.
: FL display tube grid check
: LED check
: Direct search dial check
: FL display tube anode check
The buttons are all checked with the voltage at the A/D port. The
reference voltage of A/D port is ever 5V. The voltage is calculated
at 10bit accuracy and evaluated whether same voltage can be ob-
tained in two-time operations to eliminate the chattering.
For the button check by the IF CON, a dead zone is provided, and
if voltage in the dead zone is entered, "IGNORE" is displayed.
2. Remocon Receiving Function
Upon reception of a code from the Remocon when "NOTHING"
is displayed, the function name of Remocon code is displayed on
the FL display tube. The codes that can be received are DVD cat-
egory codes only. The "DISPLAY" on Remocon functions to
change over the function name display and the code display. In the
code display mode, "REM NO xx" is displayed. A xx part is the
received code in Hex notation. It is FF when a Remocon code is
not received.
3. SYSTEM CONTROL-IF CON Serial Communication
Normally, two-way communication at 24ms interval is made be-
tween IF CON and SYSTEM CONTROL. Whether this commu-
nication is carried out normally can be checked easily. When
"NOTHING" is displayed, OFF display of "ANGLE", "DTS",
"PBC", and "NTSC" characters on the left side of FL display tube
indicates that a serial communication with the SYSTEM CON-
TROL is carried out normally. ON display of these characters in-
dicates that the communication with the SYSTEM CONTROL is
not made.
However, the communication is not made for several seconds af-
ter the Test mode became active (until MB-85 board is initialized),
and these characters may turn on. This status is normal.
[POWER]
button) on
IC601: Pin No. (Signal)
Pin 6 (AN0)
POWER
OPEN/CLOSE
PLAY
STOP
PAUSE
6-14
4. Direct Search Dial
The grid X part displays images that rotate. At the same time, the
numbers on music calendar shift toward the direction in which the
direct search dial was rotated.
(Though this is displayed on the models which do not have the
dial, it does not function because of no dial.)
5. Click Shuttle
Whether the IF CON can judge the rotation of click shuttle is
checked.In the following grid check and anode check, if the part
that lights up is shifted as the click shuttle rotates, the function is
normal.
6. Display of Fluorescent Display Tube
Use this mode when checking the FL display tube precisely, though
the FL display tube is roughly checked in the auto display mode.
[STOP]
Press simultaneously the
so that the FL display tube can all be lighted up.
[PLAY]
and buttons on the set,