Sanyo PLC-XF47 Service Manual

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NOTE : Temperature monitor operation
The temperature monitor system is provided to prevents damage of
optical components (the LCD panel and polarization film etc.) inside
a projector from overheat. Two protection systems are provided. Each
system operation as follows :
------ The temperature monitor -1: -----------------------------------
■ To control the air-flow of the cooling fans.
The CPU checks the temperature and atmospheric pressure inside a
projector. It checks a temperature using temperature sensor-IC2541
and it checks an atmospheric pressure using pressure sensor-IC886.
The CPU judges data from sensors and controls the air flow of the
cooling fans so the temperature inside the projector is maintained to
normal temperature.
■ To shut down the projector urgent.
The CPU checks temperature of LCD panel periphery(Z8P & TH) and
inhalation air(IC5801). If each part temperature reaches to abnor-
mal temperature, the CPU will turn off the projector, and will blink
WARNING TEMP. indicator at intervals of 0.5 seconds. Cooling fans oper-
ate until temperature returns to normal. Indicator will stop blink, if tem-
perature returns to normal.
------ The temperature monitor -2 : ----------------------------------
■ Temperature check of lamps :
Temperature switches are arranged near the lamps. Temperature
switches will operate, if temperature reaches 12 0 degrees. When
temperature switches become open, they cut off 12V_PFC line, the
power failure "PF_TH" signal become Low, and then the CPU will shut
down the projector, and both of READY and WARNING TEMP.
indicators will start flashing.
NOTE : SENSORS OPERATION
■ The sensor's operation is as follows:
IC886 : For FAN control
PTH901 : Abnormal temperature detection
IC2541 : Inside air temperature monitor
IC5801 : Abnormal temperature detection and
for FAN control
WARNING TEMP. indicator
(red) blink?
Th e pro jec to r is turn ed
off when the temperature
around the LCD panel reach-
es abnormal temperature.
And a WARNING TEMP. indi-
cator blinks.
The temperature
switch is operated?
If the temperature
around FET reaches 85
degrees, a PFC circuit
will be shut down.
The temperature switch is
operated?
When the temperature
around a lamp driver reach-
es 85 degrees, the lamp bal-
last will be shut down and
a lamp error signal changes
from L to H.
Temperature sensors location can be seen on
"protections"( page-8).
Troubleshooting
● Temperature Abnormality
IC801
CPU
R/C
FAN
FAN
ASS'Y
POWER
UNIT_SUB POWER
NOISE
FILTER
AC
SENSOR
AC
INPUT
BALLAST
1/2/3/4
P.F.C.
1/2/3/4
LAMP_1/2/3/4
Z8P & TH
TEMP. SENSOR
IC2541
TEMP. SENSOR
IC5801
TEMP. SENSOR
IC886
PRESSURE SENSOR
INDICATORS
FAN
CONTROL
FAN
CONTROL
RESET KEY
SW902
LAMP COVER SW
DA
CONVERTER
SW903/904/905/906
THERMAL SW
MAINS
SW
FUSE
SWITCHING
POWER
SUPPLY
PRIMARY CIRCUIT
PF_
FANS
POWER
FAIL
POWER
FAIL
12VA
12V
PF_TH
LAMP1/2/3/4
PF_PFC1/2/3/4
PWR_SW
BLAST_SW1/2/3/4
IIC
IC5851
IO
IC1881
Check FAN
circuits.
Check the
temperature
switches.

Sanyo PLC-XF47 Specifications

General

Vertical scan range	48 - 120 Hz
Horizontal scan range	15 - 120 kHz
Projection technology	LCD
Contrast ratio (typical)	2000:1
Screen size compatibility	40 - 600 \
Projector native resolution	XGA (1024x768)
Keystone correction, vertical	80 °
Keystone correction, horizontal	40 °
I/O ports	Analog (D-sub15), Serial in & Serial out (D-Sub 9 x 2)
Video out	UXGA, SXGA+, SXGA, WXGA, XGA, SVGA, VGA, MAC
Resolution	2359296 pixels
Aspect ratio	4:3
RS-232 ports	1
Dimensions (WxDxH)	581 x 815.5 x 251.5 mm
Power requirements	200-240 V AC 9.7 A Max, 50 / 60 Hz
Connectivity technology	Wired
Lamp type	NSH
Lamp power	330 W
Light source type	Lamp
Dot clock scanning frequency	230 MHz
Serial interface type	RS-232
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Power consumption (typical)	1700 W

Weight and Dimensions

Weight	36500 g