Self-diagnostic report sheet – JVC GM-P421U User Manual

Page 37

Self-diagnostic Indication

When something abnormal occurs with the Monitor, this
function informs you of the condition of the Monitor with
self-diagnostic lamps, allowing for smooth service work.

❑ If the screen monitor turns off and self-diagnostic

lamps light or flash

If the self-diagnostic lamps light or flash in red, check the

following before consulting the dealer where you
purchased the Monitor.
• If self-diagnostic lamp 1 (upper) flashes, lamp 2 (middle)

lights, and lamp 3 (lower) flashes
This may be caused by the dusty intakes on the rear. If
this happens, switch off the main power by

POWER

switch (set to “

OFF”), unplug the AC power cord,

then clean the intakes by referring to the instruction on
page 2.
– After cleaning, switch on the Monitor’s main power

again. If self-diagnostic lamps do not go off, consult
your dealer immediately.

❑ If the screen monitor dims a little and “TEMP. OVER”

lights (or flashes)

If “TEMP. OVER” lights or flashes at the right bottom of the

screen, check the following before consulting the dealer
where you purchased the Monitor.

“TEMP. OVER” appears to warn you of the internal heat

buildup, which is usually caused by accumulated dust
around the intakes or by improper installation. If the cause
of the internal heat buildup is eliminated, this indication
disappears and the screen recovers the brightness.
• If “TEMP. OVER” flashes in yellow

This may be caused by the dusty intakes on the rear. If
this happens, switch off the main power by

POWER

switch (set to “

OFF”), unplug the AC power cord,

then clean the intakes by referring to the instruction on
page 2.
– After cleaning, switch on the Monitor’s main power

again. If “TEMP. OVER” still flashes, this trouble may
be caused by improper installation or improper
location of the Monitor. In this case, consult your
dealer immediately to solve this improper
installation and to improve the circumstances around
the Monitor.

• If “TEMP. OVER” lights in red

“TEMP. OVER” will be shown for abut two minutes, the
Monitor will shut off automatically, then the Self-
diagonal lamps light in red. If this happens, switch off
the main power by

POWER switch (set to “

OFF”),

unplug the AC power cord, then consult your dealer
immediately.

If the trouble still persists, follow the procedure below:

Check which lamps are lighting or flashing.

On the Self-diagnostic Report Sheet (below), check the box
next to “Lights” or “Flashes” of the corresponding lamp or
lamps.
• Only one lamp may light or flash, or all three lamps

may do so.

Switch off the

POWER switch on the back of

the Monitor.

Unplug the power cord.

Call your dealer and tell which lamps are lighting
or flashing. (Copy and fax the Self-diagnostic
Report Sheet below.)

Note:
If you switch on the main power immediately after switching
it off (or after recovering from a brief power interruption), the
self-diagnostic lamps may light (or flash), and no image may
appear on the screen. In this case, switch off the main power
again, wait for about 10 seconds, then switch it on again. If no
self-diagnostic lamps light or flash, you can operate and use
the Monitor as usual.

Self-diagnostic Report Sheet

Store name where you purchased the Monitor

The self-diagnostic lamps light or flash as listed on the
following table. Please give me immediate advice or service if
necessary.

Self-diagnostic lamps

Upper

Middle

NO. Lamp position

Conditions

Lower

Flashes

Lights

TEMP. OVER

Flashes

Your Name:

Telephone No.:

Address:

MENU INPUT

POWER

Self-diagnostic lamps (1 to 3)

Remote sensor

Power lamp

Model Name:
Plasma Display Monitor
GM-P421U/GM-P420UG

31-37.GM-P420[US]f

02.4.1, 2:27 PM