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4. Lamp Control
Lamp Driving Circuit
Lamps on and off are carried out by signal "BALAST1_SW" and "BALAST2_SW". IC801<CPU> sends IC4802<I/O
EXPANDER> the lamp on/off signal through the parallel bus. IC4802 outputs the lamp drive signals from pins 34
and 35 and sends to the Lamp Ballast Unit via the IC5825<BUFFER> as the name of "BALAST1_SW" and "BAL-
AST2_SW".
The signals "LAMP1_TXD", "LAMP1_RXD","LAMP2_TXD" and "LAMP2_RXD" are sent to Balast1 and Balast2 via
IC4751<INVERTER>. IC801<CPU> communicates Ballast1 and Balast2 with these signals to control the each lamp.
When an abnormality occurs at the lamp or ballast, the error signals "LAMP1_RX_EX" and "LAMP2_RX_EX" output
from the ballast unit is sent to pins 167 and 168 of IC801<CPU> through IC4751<INVERTER>. Then IC801 sends
driving signals "BALAST1_SW" and "BALAST2_SW" to ballast unit to stop operating of the ballast unit which has a
failure.
Power Supply Circuit
Signals "BALAST1_SW" and "BALAST2_SW" are applied to POWER 1(AC) unit and POWER 2(AC) unit as the signal
"LAMP1_SW" and "LAMP2_SW" respectively. These signals drive the output power of lamp ballast. Signal "PFC_SW"
output from pin 36 of IC4802<I/O EXPANDER> is applied to power control circuit of POWER 1(AC)/POWER 2(AC)
through the IC5825<BUFFER>. The power control signal "POWER_SW_CPU" output from pin 211 of IC801 is applied
to power switching circuit of POWER (DC) unit through the IC5825.
Lamp Cover Switch (SW902/SW905), Thermal Switch(SW914)
When the Lamp Cover is not fixed securely, the switches SW902/SW904<LAMP COVER SW> do not turn on. The
signal "LAMP_COVER" passing through the SW902/SW904 is applied to pin 2 of IC9870<OR>. The signal "MS_
THERMO" output from the thermal switch <SW914> for the mechanical-shutter is applied on pin 1 of IC9870. When
either the input signal "LAMP_COVER" or "MS_THERMO" becomes "High", the output signal "LAMP_STOP" on pin
4 becomes "High", and the cuts off Q9802. As the result, the power supply for the lamp ballast unit is cut off and the
lamp ballast unit stops operating.
Thermal Switch (SW911/SW912)
The signal "SHUTDOWN1" becomes "High" and stops lamp ballast unit operation if the below cases happen.
- The temperature of Lamp1 or Lamp2 exceeds a certain value. (SW911 or SW912 turns off)
[NO POWER]
Point of Repair
When am abnormality occurs on the Lamp1, Lamp2, Ballast1 or Ballast2, projector cannot turn on due to operate the
protection circuit. Also if Lamp Cover or Bottom Cover is not fixed securely, projector cannot turn on due to operate
the protection circuit.
LAMP
REPLACE1
WARMING
TEMP
WARNING
FILTER
LAMP
READY
SHUTTER
LAMP
REPLACE2
Failure Parts
[SIgnals]
❂
●
❂
SW902 or SW905 is opening
[LAMPCOVER: High]
❂
●
●
Lamp1 failuer
[LAMP1_RXD: High]
●
●
❂
Lamp2 failuer
[LAMP2_RXD: High]
❂
●
●
SW914
[MS_THERMO: High]
SW904, SW911, SW912
[SHUTDOWN1: High]
●
...... LED lightning
❂
...... LED blinking
LED Indication in the Lamp Failure
Chassis Description & Troubleshooting
Содержание PLC-EF60A
Страница 100: ... 100 IC Block Diagrams BA7078AF Sync Separator IC9033 L3E01031F0A RGB Level Shift IC3501 IC3521 IC3541 ...
Страница 101: ... 101 IC Block Diagrams LB1641 Motor Driver IC1601 IC1611 IC1621 IC1631 TB1274AF RGB Matrix IC3101 ...
Страница 102: ... 102 IC Block Diagrams TC4052BFT Selector IC9005 TC90A69F PAL Y C Separator IC2101 ...
Страница 103: ... 103 IC Block Diagrams TE7780 I O Expander IC4801 IC4802 MAS1390 G Sensor IC5711 ...
Страница 104: ... 104 IC Block Diagrams ...
Страница 149: ...KJ6 EF60A00 149 Mechanical Parts List 149 A B M02 1 M02 Lens Mount M02 4 M02 4 M02 3 M02 2 Lens Mount Ass y M02 3 ...
Страница 151: ...KJ6 EF60A00 151 Mechanical Parts List Optical Filter UV IR Mirrors L12 Optical Filter UV IR L11 Mirror Cold ...
Страница 153: ...KJ6 EF60A00 153 Mechanical Parts List L15 R G Optical Filter WV Optical Filter WV S05 S05 ...
Страница 154: ...KJ6 EF60A00 154 Mechanical Parts List 1 2 0 5 L03 Integrator In Integrator In ...
Страница 155: ...KJ6 EF60A00 155 Mechanical Parts List 1 2 0 5 L02 PBS L04 Integrator Out Integartor Out PBS S05 S05 ...
Страница 156: ...KJ6 EF60A00 156 Mechanical Parts List L09 Mirror R Mirror R S05 S05 ...
Страница 157: ...KJ6 EF60A00 157 Mechanical Parts List 157 Relay lens Out L08 Relay Lens Out ...
Страница 160: ... KJ6A Feb 2006 BB 400 Printed in Japan SANYO Electric Co Ltd ...
Страница 184: ...Diagrams Drawings KJ6 EF60A00 ...