“Confidential, Do Not Duplicate without written authorization from NEC.”
8-17
CIRCUIT DESCRIPTION
5
Pump driver circuit
Under the control from the CPU PWB, the power of 12V (pump ON) or 0V (pump OFF) is fed as the power
supply for the pump.
The power for the above-mentioned pump is fed via the RELAY PWB.
Voltage level control is carried out in this case so that the revolution pulse signals obtained from the pump
can be recognized at the CPU PWB.
The power of 12V is generally fed to the pump. In the case of malfunction, however, pump ON/OFF operation
is repeated for the trial for restarting.
6
Memory
There is provision of a 4k-byte EEPROM that is connected to the CPU PWB through I2C.
This memory keeps the serial number and such information that is singular to the set.
The same memory is accommodated in the CPU PWB and the PJKEY PWB. Therefore, even though any
board is replaced, the previously mentioned information is made to be retained.
7
Motorized anamorphic lens turret driver circuit
Under the control from the CPU PWB, the power of 12V or 0V is fed as the power supply for the turret.
The driving capability is 12V/200mA, supported by the protective circuit of 500mA.
8
Lamp door detector circuit
This circuit is used to supervise the open/shut condition of the door where the lamp house is accommodated.
It is also connected to the hardware protective circuit that is used to cause the above-mentioned lamp to be
unlit.
When the door is opened, the lamp is unlit.
If the door is opened in the middle of operation of the set, the standby mode is assumed without lamp
cooling.
(There is a lamp cooling fan behind the door and it is used to stop the fan for safety.)
If the door is opened in the standby mode, the power supply of the set cannot be turned on.
9
Thermostat detector circuit
The lamp house temperature is supervised with the aid of a thermostat.
It is also connected to the hardware protective circuit that is used to cause the above-mentioned lamp to be
unlit.
When the lamp house temperature exceeds the specified level, the lamp is unlit.
If the temperature exceeds the specified level in the middle of operation of the set, the standby mode is
assumed after the completion of lamp cooling.
If the temperature exceeds the specified level in the standby mode, the power supply of the set cannot be
turned on.
0
Buzzer
The buzzer is turned ON/OFF under the control from the CPU PWB.
The buzzer sounds shortly after the closure of the AC power switch and at the occurrence of an error.
Summary of Contents for DLP CINEMA NC1600C
Page 7: ...NC1600C User s Manual DLP Cinema Projector ...
Page 53: ...47 6 Appendix 6 5 Outline Drawing 700 503 360 990 Units mm ...
Page 63: ... NEC Display Solutions Ltd 2007 Ver 2 07 07 ...
Page 64: ...NC TP6402 NC TP6401 User s Manual Touch Panel Controller NEC Viewtechnology Ltd ...
Page 71: ...G 3 MEMO Important Information ...
Page 94: ... NEC Viewtechnology Ltd 2005 2006 Printed in Japan Ver 2 06 06 ...
Page 95: ...7N8P6692 Printed on recycled paper NC TP6402 NC TP6401 User s Manual ...
Page 382: ...01154041 NC1600C ...