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6-12

The IF-89 board (IF CON) test mode is the IF CON self-diagnosis
mode. The IF CON can diagnose the functions of the IF-89 board
that the IF CON controls. Normally, the IF CON makes a serial
communication with the SYSTEM CONTROL and operates fol-
lowing the commands from the SYSTEM CONTROL, but in the
Test mode, the IF CON operates independently from the SYS-
TEM 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. Click 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 monitoring, display of fluo-
rescent display tube, and LED control.
1. The routine that monitors +3.3 V (PCONT) of MB-103 board

is not provided.

2. The monitoring timer for serial communication with the SYS-

TEM CONTROL is not provided. The main unit is not placed
in the Standby mode, even if the communication with SYS-
TEM CONTROL is normal.

3. Display of fluorescent display tube.

(Normally, display is made following the commands from SYS-
TEM CONTROL)

4. LED control.

(Normally, control is made following the commands from SYS-
TEM CONTROL)

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-103 board are not connected to the AV-61 board, or while
pressing the  x  key on the main unit with the IF CON in
STANDBY mode, enter [RETURN] 

t [DISPLAY] (or [SET UP])

on the remote commander, and the main unit transits to the Self
Check Mode.

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2-2. Operation of Auto Self Check
When the Self Check mode becomes active at the AC Power ON or by key input, the test display of the following steps (1) to (4) is
repeated.

(1) FLD and LED all ON (for 5 seconds)

(2) MODEL display (for 2 seconds)

(3) Version display (for 2 seconds)

(4) ROM creation date display (for 2 seconds)

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2-3. Each Self Check Function
Each Self Check function tests the FLD display, LED display, and
key input.

2-3-1. FLD and LED All ON
2-3-1-1. Transition Keys in Self Check Mode
•  x  key and  Z  key on the main unit
• 

%

  key on the main unit and the remote commander

2-3-1-2. Operation and Display
In this mode, all LEDs except STANDBY LED and all segments of
FLD turn ON.

2-3-2. Main Unit Key Name Display and Key Code Display
2-3-2-1. Transition Keys in Self Check Mode
• Keys on the main unit except keys transited in Self Check Mode

2-3-2-2. Operation and Display
When a key on the main unit is pressed in the Self Check mode, the
name of that key is displayed on the FLD. Also, the key name display
and the key code display can be switched with the [DISPLAY] key on
the remote commander. “NOTHING” is displayed when nothing is
entered. Also, VIDEO CD, DVD, and CD segments turn on when a
communication error occurred.

• FLD display (at input of   H  key on the main unit)

Input

IC404: Pin No. (Signal)

Voltage [V]

Pin ed

 (BNRKEY)

Pin ef

 (PLAY)

Pin eg

 (O/C)

Pin eh 

(TVS)

0 – 0.2

–

PLAY

OPEN/CLOSE

TVS

0.6 – 0.82

–

NEXT

–

PIC MODE

1.16 – 1.47

–

PREVIOUS

–

MODE

1.8 – 2.12

–

PAUSE

–

–

2.48 – 2.7

–

STOP

–

–

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• Key code display
  (at input of   H  key, key code: 0 Ah)

• Remote commander key code display
   (at input of  X  key, key code: 39 h)

2-3-3. Remote Commander Key Name Display and Key
Code Display
2-3-3-1. Transition Keys in Self Check Mode
• Remote commander keys except keys transited in Self Check Mode

2-3-3-2. Operation and Display
When a key on the remote commander is pressed in the Self Check
Mode, the name of that key is displayed on the FLD. Also, the key
name display and the key code display can be switched with the
[DISPLAY] key on the remote commander. “NOTHING” is displayed
when nothing is entered. Also, VIDEO CD, DVD, and CD segments
turn on when a communication error occurred.

• Remote commander key name display (at input of  X  key)