NEC PX-50XM4, Service Manual

Page: 250 / 535

(2) Blinking in green
Alarm of te

mperature sensor error
YES
NO
The TS connector
or the SENC PWB
is fault.
NO
YES
The TR connector
or the SEND PWB
is fault.
Is there a display of
numerals (almost room
temperatures) at the right
side of [T1, T2, T3]?
YES
NO
When a [-] display is presented, the PWB with the symbol shown
below is fault. T1: SEND PWB, T2: SENB PWB, T3: SENC PWB
Are there a 3.3Vdc
output at Pin and

a
clock signal (3.3Vpp)
at Pins and of the
 
TR in the state that the
TR connector is
disconnected and the
main power supply is
turned on?
Are there a 3.3Vdc
output at Pin

and a
clock signal (3.3Vpp)
at Pins
 and  of
the TM in the state
that the TM connector
is disconnected and
the main power
supply is turned on?
YES
The TM connector
or the SENB PWB
is fault.
NO
The MAIN PWB is fault.
Is there a display of [-] for
all the numerals at the
right side of [T1, T2, T3]?
NO
YES
Press the remove control keys in the
sequential order of [POWER ON]
→
[POWER ON] → [EXIT] → [DISPLAY] and
enter the factory adjustment menu. Press
the [MENU/ENTER] key to
display the FAN SET menu (P2/11).
Blinking in green (intervals of 2 seconds)
FAN SET
Turn off the main power supply.
Pressing the [MENU] key of the product,
turn on the main power supply to cancel
alarming.
FAN SET
FAN MODE
H CONT ENA –
FAN OFF/L – CONT UP –
FAN L/M – CONT TIME –
FAN M/H – UP STEP 2
SF SAVE 075 DOWN STEP 2
PLE SAVE 070 READ TIME 60
T ALM 095 TEMP LEVEL 1
RET TME 030
PLE TIME 001
T1 030 T2 025
T3 030 T4 –
MODE 2
IC ERROR –
[MENU/ENTER] NEXT [EXIT] PREV 2/11
The MAIN PWB
is fault.
Are there a 3.3Vdc
output at Pin and a

clock signal (3.3Vpp)
at Pins and of the
 
TS in the state that the
TS connector is
disconnected and the
main power supply is
turned on?
CONFIDENTIAL
5-3