Mitsubishi Mr.Slim WD-52627, Training Manual

Page: 43 / 72

4-1
Chapter 4
Down-to-1
Troubleshooting
The goal of Down-to-1 troubleshooting is… using a
minimum amount of time and test equipment, make
an accurate diagnosis of a failure 9 out of 10 times.
The 2005-2006 Micro-Display product line lends itself
to this discipline very well.
Using The Front Panel LEDs
The front panel LEDs, Figure 4-1 , provide an indica-
tion of the sets operation, and the possible cause of a
malfunction. There are three front panel LEDs, “Power”,
“Status” and “Lamp”. Which LED is lit, the color and
whether it is blinking or steady indicates to the customer
the current status, or a possible malfunction. Using the
Front Panel LEDs is similar for LCD and DLP based
sets. The indications are also listed in the Owners Guide.
Figure 4-1: Front Panel LEDs
Normal Indications … The LEDs provide the cus-
tomer with status information that indicates several nor-
mal operational modes. Normal indications are give in
Table 4-1 .
Abnormal Indications … The LEDs also provide the
customer with status information indicating abnormal con-
ditions. Abnormal indications are give in
Table 4-2 .
POWER
LED
STATUS
LED
LAMP
LED
Power
Status
Condition
Off Off Off Stby Off
Green Off Off P-0N Power On
Off Off
Blinks
Green
30
Seconds
After Off
Set cannot be turned On until
Lamp has cooled.
Blinks
Green
Off Off Stby Booting after AC applied
Slow Blinks
Green
Off Off Stby On Timer is set
POWER
LED
STATUS
LED
LAMP
LED
Power
Status
Condition
Off Yellow Off
Low
Power
Excess Temperature
Off or On Off Yellow
No
change
Lamp time over 4000 Hrs.
Off Off
Blinks
Yellow
Low
Power
Lamp Cover open
Off
Blinks
Yellow
Off " Filter Cover Open (V28 Only)
Off Off Red Stby Lamp did not turn On
Off
Blinks
Red
Off
Low
Power
Fan Stopped
Off Red Off " Circuit Failure
Normal LED Indications
Abnormal LED Indications
Table 4-1
Table 4-2