NEC NC1600C Service Manual page 171

ADJUSTMENTS AND INSPECTIONS ATTRIBUTABLE TO THE REPLECEMENT OF ELECTRICAL AND OPTICAL PARTS
7) Operation check for the GPIO terminal
Check the operation of the GPIO terminal by means of the I/O tester.
1 Before turning ON the AC Switch of the Projector, make a connection between the GPIO tester and the
Projector (GPIO terminal and REMOTE IN terminal). (For the connection between the GPIO tester and
the REMOTE IN terminal of the set, use a cable for the remote controller.)
In this case, all the GPIO-IN POWER keys of the GPIO tester shall be made to stay in OFF positions.
2 Start the Projector and confirm that the respective functions specified in the table below are available under
the control from the GPIO tester. (On- > Off in the table below: The On period shall be 500ms or more.)
However, operation check for the Lamp on/off function is possible even in the middle of the projector in
Standby mode.
In the standby mode, the present Lamp on/off status is displayed in the LCD screen. The GPIO system is
regarded to have passed the test if the Lamp ON/OFF status displayed in the LCD screen changes when
the Lamp on/off function in the table below is used.
Example) Execution of Lamp on with the GPIO tester → Defined as PASS with a display of "Lamp on" in
the LCD screen
Function
Lamp on
Lamp off
Douser on
Douser off
Macro Key 1
Macro Key 2
Macro Key 3
Macro Key 4
Macro Key 5
Macro Key 6
Macro Key 7
Macro Key 8
Caution) At the time of execution of the Macro Key functions, On-Off control shall be carried out
simultaneously for the two GPIO terminals.
Complementary info) If the projector is started in the Standby mode in the state that "Lamp off" is displayed
"Confidential, Do Not Duplicate without written authorization from NEC."
GPIO-IN1 GPIO-IN2
EXT-EN POWER
On->Off Off
Off On->0ff
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
in the LCD screen [starting in Lamp off mode (Default)], the lamp remains to be
turned OFF even after the start of the projector. To check the presence of pictures
from the projector and others, the lamp can be turned on in the method specified
below.
[Method of Lamp on/off after the start of the Projector]
There are three methods.
• Operation from DDC → Press Lamp [On]/[Off] in START Menu.
• Operation from GPIO → Execute the Lamp on/off function specified in the table above.
• Operation from main-unit key → Refer to the separate page [Control key and
LED operation check].
GPIO-IN3 GPIO-IN6
SHUTTER INPUT SW2
Off Off
Off Off
Off Off
Off Off
On->Off Off
On->Off Off
On->Off Off
On->Off Off
On->Off On->Off
On->Off On->Off
On->Off On->Off
On->Off On->Off
7-8
GPIO-IN5 GPIO-IN4
INPUT SW1 INPUT SW0
Off Off
Off Off
Off On->Off
On->Off Off
Off Off
Off On->Off
On->Off Off
On->Off On->Off
Off Off
Off On->Off
On->Off Off
On->Off On->Off