Using The Front Panel Led - Mitsubishi V19-V21 Tehnical Manual

LED Indications
Off
Fast Blink for 70 sec.
Fast Blink (doesn't stop)
Slow Blink
Troubleshooting the analog circuitry in the V19/V21 is
basically the same as in previous modes. Although the
DM Module is a replaceable component, the service
technician must determine that it is the cause of a prob-
lem. The following tips are useful in determining the
source of a problem

Using The Front Panel LED

The Front Panel LED helps isolate the cause of the
following problems.
• The TV will not turn On.
• The TV turns On, and then Shuts Off.
If the TV will not turn On, the LED response indi-
cates the possible cause of the problem. Table 11-1
lists the possible LED response when this problem
occurs.
When the TV turn On and then shuts Off, the LED
Diagnostic Error codes help isolate the problem. This
is the same LED Diagnostic featured on some previ-
ous model TVs.
Figure 11-1 shows the LED Error Code Activation
Procedure, an is describe in the following:
1) With the TV Off
2) Press and hold the front panel "MENU" and
"DEVICE" buttons for 5 seconds.
Chapter 11
Troubleshooting Tips
Conditions
After AC is applied Standy Power Supply or TV µPC not running
After AC is applied Normal - DM µPC is booting up
After AC is applied TV µPC is running, but DM failed to boot up
Set is Off
Table 11-1: Front Panel LED Indications
Probable Cause
Normal - Timer is set for Automatic Turn ON
3) The LED will flash the Error Code indicating
what caused the TV to shut Off.
4) The Error Code will be repeated 5 times.
5) When the LED stops flashing the mode is
automatically terminated.
Reading the Error Codes
The Error Codes are two digit numbers. The LED:
• Flashes the value of the most significant digit
(MSD).
• Then there is a pause.
• Flashes the value of the least significant digit
(LSD).
• The Error Code is repeated 5 times.
11-1