If Con Self Diagnostic Function - Sony RMT-D122A Service Manual

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On the Test Mode Menu screen, selecting
for prog level adjustment. During display of color bars, OSD dis-
appears but the menu screen will be restored if pressing any key.
2. PROG VIDEO LEVEL ADJUSTMENT
Measurement point
Measuring instrument : Oscilloscope
Adjustment device
Specified value
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displays color bars
: COMPONENT VIDEO OUT (Y)
(75 Ω terminating resistance)
: RV401 on VP-52 board
+ 0.04
: 1.00 Vp-p
– 0.02
1.00
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6-10. IF CON SELF DIAGNOSTIC FUNCTION

1. FL-114 BOARD (IF CON) TEST MODE
The front board test mode is the IF CON self diagnostic mode.
The IF CON can diagnose the functions of the front panel boards
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. Remocon receiving function
3. SYSTEM CONTROL-IF CON serial communication
+ 0.04
Vp-p
– 0.02
4. Click shuttle function
5. Fluorescent display tube lighting check
Grid check
Anode check
6. LED control function
7. DIMMER test
8. BEEP test
9. SOUND test
10. SCACE test
11. FADE IN/OUT test
In the Test mode, the set operates same as usual, except voltage
monitoring, communication monitoring, display of fluorescent
display tube, and LED control.
1. The routine that monitors +3.3 V (PCONT) of MB-91 board is
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not provided.
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2. The monitoring timer for serial communication with the SYS-
TEM CONTROL is not provided. The set 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 made
following the commands from SYSTEM CONTROL)
4. LED control (normally, control is made following the com-
mands 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 IF CON was reset (assuming that the
MB-91 board is not connected). While pressing the
the main unit with the IF CON in STANDBY mode, enter
→
[DISPLAY]
transits to the Self Check Mode. The Self Check mode terminates
when the IF CON transits to the STANDBY mode.
.
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[SET UP]
(or ) on the remote commander, and the unit
m
co
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[STOP]
key on
[RETURN]