If Con Self Diagnostic Function - Sony DVP-NS330 Service Manual

6-10. IF CON SELF DIAGNOSTIC FUNCTION

1. AF-98 BOARD (IF CON) TEXT MODE
The AF-98 board (IF CON) test mode is the IF CON self-
diagnosis mode. THe IF CON can diagnose the functions of the
AF98 board that the IF CON controls. Normally, the IF CON
makes a serial communication with the SYSTEM CONTROL
and operates following the commands from the SYSTEM
CONTROL, but in the Test mode, the IF CON operates
independently from the SYSTEM CONTROL.
In the test mode, the following functions can be checked.
1. Button function
2. Remote commander receiving function
3. SYSTEM CONTROL-IF CON serial communication
4. Clisk shuttle function
5. Fluorescent display tube lighting check
Grid check
Anode check
6. LED control function
In the test mode, the main unit operates same as usual, except
voltage monitoring, communication, display of fluorescent
display tube, and LED control.
1. Theroutine that monitors +3.3V (PCONT) of MB-108 board
is not provided.
2. The monitoring timer for serial communication with the
SYSTEM CONTROL is not provided. The main unit is not
placed in the Standby mode, even if the communication with
SYSTEM CONTROL is normal.
3. Display of fluorescent display tube.
(Normally, display is mode following the commands from
SYSTEM CONTROL).
4. LED control.
(Normally, control is mode made following the commands
from SYSTEM CONTROL).
2. OPERATION OF SELF CHECK MODE
The Self Check mode is the function to conduct the basic test to
the FL display and DVD panel section.
2-1. Self Check Mode Transition Processing
At the AC Power ON after reset of IF CON is released with the
MB-108 board are not connected to the AF-98 board, or while
pressing the key on the main unit with the IF CON in
x
STANDBY mode, enter [RETURN] t [DISPLAY] (or [SETUP])
on the remote commander, and the main unit transits to the Self
Check Mode.
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