Self Diagnosis Function; Diagnostic Test Indicators; Self-Diagnostic Screen Display - Sony KDL-32R420A Service Manual

SELF DIAGNOSIS FUNCTION

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem.
A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user's knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these
problems occur.

DIAGNOSTIC TEST INDICATORS

When an error occurs, the STANDBY LED will flash a set number of times to
indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a "0", no error has occurred .
DISPLAY OF STANDBY LED FLASH COUNT

SELF-DIAGNOSTIC SCREEN DISPLAY

For errors with symptoms such as "power sometimes shuts off" or "screen sometimes goes out" that cannot be confirmed, it is possible to bring up past occurrences of failure for
confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK)
Service menu Item
STBY LED
name
Flash time
(Screen Display)
2 MAIN_POWER
3
TUNER_ERR
AUDIO_PROT
DC_ALERT1
4
BALANCER_ERR
5
TCON_ERR
PANEL_POWE
6 BACKLIGHT_ERR
7
TEMP_ERR
8 -
9 -
10 -
11 -
12 -
Diagnostic Item Description
Detect power board 12V. (V_DROP_DET)
Detect TS signal Error.
Detect Audio Amp Error.
Detect +3.3V+5V Drop. (V_DROP_DET)
Not used
Not used
Not used
Detect panel backlight ready.
Not used
Not used
Not used
Not used
Not used
Not used
9