Sanyo PLC-ET30L User manual

Multimedia Projector
SERVICE MANUAL
PRODUCT CODE
1 122 427 20 (KF7AL)
1 122 428 20 (LF7AL)
1 122 428 22 (LF7CL)
Original Version
REFERENCE NO. SM5110953-00
FILE NO.
Model No. PLC-ET30L
U.S.A, Canada,
Europe, U.K, Asia
Chassis No. KF7-ET30L00
Match the Chassis No. on the unit's back cover with the
Chassis No. in the Service Manual.
If the Original Version Service Manual Chassis No. does
not match the unit’s, additional Service Literature is re-
quired. You must refer to “Notices” to the Original Service
Manual prior to servicing the unit.
* Projeccton Lens is optional

-2-
Contents
SERVICE MANUAL....................................................... 1
Contents ........................................................................ 2
Safety Instructions......................................................... 3
Safety Precautions ..................................................... 3
Product Safety Notice................................................. 3
Service Personnel Warning ........................................ 3
Specifications ................................................................ 4
Circuit Protections ......................................................... 5
Fuse............................................................................ 5
Thermostat (SW901) .................................................. 6
Lamp cover switch (SW902)....................................... 6
Temperature sensors (TH901, TH902, IC8841)......... 7
Power failure and fan lock detection........................... 8
Maintenance.................................................................. 9
Cleaning the Air Filter ................................................. 9
Resetting the Filter Counter........................................ 9
Lamp Replacement .................................................. 10
Resetting the Lamp Counter..................................... 11
How to check Lamp Used Time................................ 11
Quick maintenance................................................... 12
Prohibition of motor control....................................... 13
Cleaning ................................................................... 14
Security Function Notice.............................................. 15
Mechanical Disassembly............................................. 16
Optical Parts Disassembly........................................... 34
Adjustments................................................................. 49
Adjustments after Parts Replacement ...................... 49
Note on the main board replacement ....................... 49
Optical Adjustments..................................................... 50
Before Adjustment .................................................... 50
1. Optical axis adjustment ........................................ 51
2. Contrast adjustment ............................................. 55
Electrical Adjustments ................................................. 56
Service Adjustment Menu Operation........................ 56
Memory IC (IC1391) Replacement........................... 56
Circuit Adjustments................................................... 57
Test Points and Locations ........................................ 60
Service Adjustment Data Table ................................ 61
Troubleshooting........................................................... 77
Chassis over view..................................................... 77
No Picture................................................................. 78
No Sound.................................................................. 80
Motor Control Problems............................................ 84
Bus control................................................................ 85
LED drive & RC control ............................................ 86
Indicators and Projector Condition ........................... 87
Power failure detection system ................................ 89
Error information table .............................................. 89
Power failure detection tree...................................... 90
Error History Log ...................................................... 91
Diagnosis of Power Failure with RS-232C port ........ 92
Diagnosis procedure................................................. 92
Control Port Functions................................................. 93
System Control I/O Port Functions (PW392, IC301) 93
Parallel I/O Expander Port Functions (TE7783,
IC1801)..................................................................... 94
Parallel Bus Input Expander Port Functions
(TC74LCX541, IC1881)............................................ 95
IC Block Diagrams....................................................... 96
Parts Location Diagrams ........................................... 103
Mechanical Parts Location ..................................... 103
Electrical Parts Location ......................................... 110
Mechanical Parts List ................................................ 111
Electrical Parts List.................................................... 112
Diagrams & Drawings..................................................A1
Parts description and reading in schematic diagram...A2
Schematic Diagrams ...................................................A3
Printed Wiring Board Diagrams.................................A11
Pin description of diode, transistor and IC.................A15
Note on Soldering......................................................A16

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Safety Instructions
WARNING:
The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side
of the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is
identified with the line ( ) in the schematic diagram. For continued product safety and protection of per-
sonnel injury, servicing should be made with qualified personnel.
The following precautions must be observed.
Safety Precautions
1: An isolation transformer should be connected in
the power line between the projector and the AC
line before any service is performed on the projec-
tor.
2: Comply with all caution and safety-related notes
provided on the cabinet back, cabinet bottom, inside
the cabinet or on the chassis.
3: When replacing a chassis in the cabinet, always
be certain that all the protective devices are
installed properly, such as, control knobs, adjust-
ment covers or shields, barriers, etc.
DO NOT OPERATE THIS PROJECTOR WITHOUT
THE PROTECTIVE SHIELD IN POSITION AND PR
OPERLY SECURED.
4: Before replacing the cabinet cover, thoroughly
inspect the inside of the cabinet to see that no stray
parts or tools have been left inside.
Before returning any projector to the customer, the
service personnel must be sure it is completely safe
to operate without danger of electric shock.
Service Personnel Warning
Eye damage may result from directly viewing the light produced by the Lamp used in this equipment. Always
turn off Lamp before opening cover. The Ultraviolet radiation eye protection required during this servicing.
Never turn the power on without the lamp to avoid electric-shock or damage of the devices since the stabilizer
generates high voltages (15kV - 25kV) at its starts.
Since the lamp is very high temperature during units operation replacement of the lamp should be done at least
45 minutes after the power has been turned off, to allow the lamp cool-off.
Product Safety Notice
Product safety should be considered when a component replacement is made in any area of the projector.
Components indicated by mark !in the parts list and the schematic diagram designate components in which
safety can be of special significance. It is, therefore, particularly recommended that the replacement of there
parts must be made by exactly the same parts.
DO NOT ATTEMPT TO SERVICING THE REMOTE CONTROL UNIT.
Laser Beam may be leaked out when in disassemble the Unit. As the Laser Beam
used in this Remote control unit is harmful to the eyes.
If the remote control unit is failed, replace with new one.

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Specifications
This symbol on the nameplate means the product is Listed by Underwriters
Laboratories Inc. It is designed and manufactured to meet rigid U.L. safety stan-
dards against risk of fire, casualty and electrical hazards.
Mechanical Information
Projector Type Multi-media Projector
Dimensions (W x H x D) 13.7” x 6.46” x.17.48” (348.1 mm x 164 mm x 444 mm) (Not including adjustable feet)
Net Weight 17.86 lbs (8.1 kg)
Feet Adjustment 0˚ to 5.0˚
Panel Resolution
LCD Panel System 1.0” TFT Active Matrix type, 3 panels
Panel Resolution 1,400 x 1,050 dots
Number of Pixels 4,410,000 (1,400 x 1,050 x 3 panels)
Signal Compatibility
Color System PAL, SECAM, NTSC, NTSC4.43, PAL-M, and PAL-N
High Definition TV Signal 480i, 480p, 575i, 575p, 720p, 1035i, and 1080i
Scanning Frequency H-sync. 15 kHz–100 kHz, V-sync. 50 Hz–100 Hz
Optical Information
Projection Lamp 330 W
Interface
Input 1 Digital (DVI-D) x 1, Analog (Mini D-sub 15 pin) x 1
Input 2 BNC Type x 5 (G or Video/Y, B or Cb-Pb, R or Cr-Pr, HV and V)
Input 3 RCA Type x 1, Mini DIN 4 pin x 1
AUDIO IN Audio 1 (Mini Type stereo), Audio 2 (Mini Type stereo), Audio 3 (RCA Type) x 2
Analog Out Mini D-sub 15 pin x 1
Audio Out Audio (Mini Type stereo) x 1
R/C Jack Mini Type (Wired Remote) x 1
Control Port Mini DIN 8 pin x 1
USB Connector USB Series B x 1
Option PJ-Net Organizer Terminal x 1
Audio
Internal Audio Amp 1.0 W RMS
Built-in Speaker 1 speaker, ø1.1” (28 mm)
Power
Voltage and Power Consumption AC 100–120 V (4.6A Max. Ampere), 50/60 Hz (The U.S.A and Canada)
AC 200–240 V (2.3A Max. Ampere), 50/60 Hz (Continental Europe and The U.K.)
Operating Environment
Operating Temperature 41˚F–95˚F (5˚C–35˚C)
Storage Temperature 14˚F–140˚F (-10˚C–60˚C)
Remote Control
Battery AAA or LR03 Type x 2
Operating Range 16.4’ (5 m/±30˚)
Dimensions 1.8” (W) x 1.0” (H) x 5.7” (D) (45 mm x 25 mm x 145 mm)
Net Weight 3.5 oz (99 g) (including batteries)
Laser Pointer Class II Laser (Max. Output: 1 m W/Wave length: 640–660 nm)

-5-
This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the projec-
tor, it will automatically turn off by operating one of the following protection circuits.
Circuit Protections
Fuse
A fuse is located inside of the projector. When the POWER
indicator is not lightning, the fuse may be opened. Check
the fuse as following steps.
The fuse should be used with the following type;
Fuse Part No. : 323 027 2605
TYPE T10.0AH 250V FUSE
215010. LITTEL
How to replace the fuse
1. Loosen the screw of the lamp cover and open the lamp
cover.
2. Loosen 2 screws of lamp ass'y and pull out the lamp
ass'y.
3. Remove the screw-A and remove the fuse cover follow-
ing to "Mechanical Disassembly".
4. Remove the fuse from fuse holder on the Power(Filter)
board .
To install the fuse, take reversed step in the above.
Loosen the screw and
open the lamp cover.
Loosen the 2 screws and pull out
the lamp ass'y.
Fuse
Screw-A
Fuse cover

-6-
Lamp cover switch (SW902)
The lamp cover switch (SW902) cuts off the drive signal
to the lamp circuit when the lamp cover is removed or not
closed completely. After opening the lamp cover for replac-
ing the lamp ass’y, place the lamp cover correctly otherwise
the projector can not turn on.
Thermostat (SW901)
There is the thermostat (SW901) inside of the projector to
detect the internal temperature rising abnormally. When the
internal temperature reaches near 100˚C, the thermostat
opens to stop the operation of the power supply circuit.
The thermostat will automatically return to normal condi-
tion when the internal temperature becomes normal (about
60 ˚C) .
Thermostat
(SW901)
Lamp cover
Lamp cover switch
(SW902)
Circuit Protections

-7-
The projector provides a temperature sensor IC on the Main board and 2 thermistors. The temperature sensor IC
monitors around the lamp house, the thermistors are placed on the blue panel holder and on the intake duct.
- Internal temperature sensor A (IC8841) (around the lamp house)
- Panel sensor B (TH902) (around the blue panel)
- Room temperature sensor C (TH901) (around the intake duct)
Circuit Protections
TH902
TH901
IC8841
(Behind PWB)
The projector is shut down and the WARNING TEMP. indi-
cator is blinking red.
When the temperature inside the projector reaches a cer-
tain level, the WARNING TEMP. indicator is blinking slowly.
When the inside temperature becomes high, the projector
will be automatically shut down to protect the inside of the
projector. The WARNING TEMP. indicator is blinking faster
and the POWER indicator is blinking. The POWER indicator
is blinking while the projector is being cooled down. When
the projector has cooled down enough (to its normal operat-
ing temperature), it can be turned on again by pressing the
ON/STAND-BY button.
✔Note:
• The WARNING TEMP. indicator continues to blink even after
the temperature inside the projector returns to normal. When
the projector is turned on again, the WARNING TEMP. indica-
tor stops blinking.
WARNING TEMP. indicator
POWER indicator
Temperature sensors (TH901, TH902, IC8841)

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The projector provides the detection circuits of the power failure and the fan lock. When the detection circuit detects
an error at the power supply line or at the fan operation circuit, the projector will turn into the standby mode to protect
the other circuits defective.
Circuit Protections
The projector is shut down and all five indicators are
blinking.
When the projector detects an abnormal condition, it will be
automatically shut down to protect the inside of the projec-
tor and all five indicators on the top panel blink. In this case,
unplug the AC power cord and plug it, and then turn on the
projector once again to verify operation. If the projector can-
not be turned on and these indicators are still blinking, unplug
the AC power cord.
CAUTION
DO NOT LEAVE THE PROJECTOR WITH THE AC
POWER CORD CONNECTED UNDER AN AB-
NORMAL CONDITION. IT MAY RESULT IN FIRE
OR ELECTRIC SHOCK.
All five indicators
are blinking
Top Control
Power failure and fan lock detection

-9-
Maintenance
Cleaning the Air Filter
Turn off the projector, and unplug the AC power cord
from the AC outlet.
First, clean up the dust on the projector and around the
air vents.
1
2
Filter prevents dust from accumulating on the optical elements inside the projector. Should the filter becomes
clogged with dust particles, it will reduce cooling fans’ effectiveness and may result in internal heat buildup and
adversely affect the life of the projector. If a “Filter warning” icon (yellow or red) appears on the screen and the
WARNING FILTER indicator lights or blinks, clean the filter immediately. Clean the filter by following the steps
below.
Pull out the filter cover from the projector and then re-
move the filter.
3
Reinstall the filter into the projector properly.
5
CAUTION
Do not operate the projector with the filter removed.
Dust may accumulate on the optical elements de-
grading picture quality.
Do not put anything into the air vents. Doing so may
result in malfunction of the projector.
Gently clean the filter by using a brush or blower.
WARNING: Do not wash the filter with water and any
other liquid matter. Otherwise the filter may be dam-
aged.
4
Reset the filter counter in the Setting Menu. See “Reset-
ting the Filter Counter” below.
6
Press and hold the
filter cover and pull
out the filter.
Filter cover Filter
Filter
Filter cover
Be sure to reset the Filter counter after cleaning or replacing the filter.
Press the MENU button to display the On-Screen Menu.
Use the Point 7 8 buttons to move the red framed
pointer to the Setting Menu icon.
Use the Point ed buttons to move the red framed point-
er to Filter counter and then press the SELECT button.
A dialog box appears showing the total accumulated
time of the filter use, a timer setting option, and the re-
set option. Select Reset and the “Filter counter Reset?”
appears. Select [Yes] to continue.
1
2
Resetting the Filter Counter
Filter counter
NOTE: If the filter is heavily clogged and unable
to clean, replace it with a new one.
Consult your dealer for details.
Select Reset and the“ Filter
counter Reset?” appears.
Select [Yes],
then another
confirmation
box appears.
Select [Yes] again to reset
the Filter counter.
Another confirmation dialog box appears, select [Yes] to
reset the Filter counter.
3
Replacement Filter Part No.: 910 330 7184

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Maintenance
Lamp Replacement
ORDER REPLACEMENT LAMP
Type No. POA-LMP116
Service Parts No. 610 335 8093
When the projection lamp of the projector reaches its end
of life, the Lamp replacement icon appears on the screen
and LAMP REPLACE indicator lights yellow. Replace the
lamp with a new one promptly. The timing when the LAMP
REPLACE indicator should light is depending on the lamp
mode.
Follow these steps to replace the lamp.
For continued safety, replace with a lamp of the same
type lamp. Do not drop the lamp or touch the glass bulb!
The glass can shatter and may cause injury.
Allow a projector to cool for at least 45 minutes
before you open the Lamp cover. The inside of
the projector can become very hot.
CAUTION
Turn off the projector and unplug the AC power cord. Let
the projector cool for at least 45 minutes.
Remove the two (2) screws that secure the lamp. Lift the
lamp out of the projector by using the handle.
1
3
Replace the lamp with a new one and secure the two (2)
screws. Make sure that the lamp is set properly. Put the
lamp cover back and secure it with the screw.
4
Remove the screw that secures the lamp cover, and
then open the lamp cover.
2
Connect the AC power cord to the projector and turn on
the projector.
6Reset the lamp counter.
See “Resetting the Lamp Counter” on the next page.
5
CAUTION
Screw
Lamp replacement icon
WARNING:
TURN OFF THE UV LAMP BEFORE
OPENING THE LAMP COVER
Top Control
Handle
Screws
LAMP REPLACE
indicator
Lamp Cover

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The LAMP REPLACE indicator will light yellow when the total lamp used time (Corresponding value) reaches 3,000
hours. This is to indicate that lamp replacement is required.
The total lamp used time is calculated by using the below expression,
Total lamp used time (Corresponding value) = Teco + (Tnormal x 1.25) + (Thigh x 1.5)
Teco: used time in the Eco mode
Tnormal : used time in the Normal mode
Thigh : used time in the High mode
You can check the lamp used time following to the below procedure.
1Press and hold the ON/STAND-BY button on the projector for more than 20 seconds.
2The projector used time and lamp used time will be displayed on the screen briefly as follows.
Counter
Projector 700 H
Lamp
High 200 H
Normal 200 H
Eco 300 H
Corresponding value 850 H
Total lamp used time
Projector used time
How to check Lamp Used Time
Maintenance
Be sure to reset the Lamp counter after the lamp is replaced. When the Lamp counter is reset, the LAMP RE-
PLACE indicator stops lighting and the Lamp replacement icon disappears.
Press the MENU button to display the On-Screen Menu.
Use the Point 7 8 buttons to move the red framed
pointer to the Setting Menu icon.
Use the Point ed buttons to move the red framed point-
er to Lamp counter and then press the SELECT button.
A dialog box appears showing the total accumulated time
of the lamp usage and the reset option. Select Reset and
the “Lamp replacement counter Reset?” appears. Select
[Yes] to continue.
1
2
Another confirmation dialog box appears, select [Yes] to
reset the Lamp counter.
3
Resetting the Lamp Counter
✔Note:
• Do not reset the Lamp counter without implementing lamp
replacement. Be sure to reset the Lamp counter only after
replacing the lamp.
Select [Yes],
then another
confirmation
box appears.
Select [Yes] again to reset
the Lamp counter.
Select Reset and the “Lamp
replacement counter Reset?”
appears.
Lamp counter

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Maintenance
Screw-A
Prism cover panel
This projector provides a prism cover on the cabinet top to enhance the service maintenance. This enables service
personnel to align the optical adjustment or replace the optical parts without disassembly the cabinet top.
1. Loosen 1 screw-A and open the prism cover panel.
2. To remove the LCD Panel/Prism ass'y, loosen 3 screws-B and disonnect a socket-D, and then pull the LCD Panel/
Prism ass'y up.
3. To remove the Optical filter ass'y, remove a screw-C on each stopper of the Optical filter ass'y and then pull the
Optical filter ass'y up.
Screw-B
Screw-C
Screw-B
Screw-B
Screw-C
Screw-C
L
L
Maintenance
Quick maintenance
Socket-D
Grounding
wire

-13-
This projector provides a function to prohibit the operation of motors. After installing the projector and then setting up
this function. You can protect the unexpected operation by the users. All the motor controls, Focus, Zoom and Lens-
shift, will not be operated. The prohibition icon will appear on the screen when user presses any of the motor control
buttons.
Maintenance
Prohibition of motor control
!
Prohibition icon
Setting up procedures
1. Enter the service mode.
2. Select Group no. "200" and Item no. "55". Change Data value from "0" (Not prohibited) to "1" (Prohibited). Now the
motor control is prohibited.
3. Exit from the service mode.
To cancel the prohibition mode, set value to "0" in the step 2.
* How to enter the service mode and select the group, item and data value, see "Service Adjustment Menu Opera-
tion".

-14-
Cleaning
Cleaning with air spray
1. Remove the cabinet top following to “Mechanical Dis-
assemblies”.
2. Clean up the LCD panel and polarizing plate by using
the air spray from the cabinet top opening.
Caution:
Use a commercial (inert gas) air spray designed for
cleaning camera and computer equipment. Use a resin-
based nozzle only. Be vary careful not to damage optical
parts with the nozzle tip. Never use any kind of cleanser
on the unit. Also, never use abrasive materials on the
unit as this may cause irreparable damage.
After long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarized glass,
lens, etc., causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit.
Remove dust and other particles using air spray. If dirt cannot be removed by air spray, disassemble and clean the
optical unit.
Disassembly Cleaning
Disassembly cleaning method should only be performed
when the unit is considerable dirty and cannot be suf-
ficiently cleaned by air spraying alone.
Be sure to readjust the optical system after perform-
ing disassembly cleaning.
1. Remove the cabinet top and main units following to
“Mechanical Disassemblies”.
2. Remove the optical base top following to “Optical Unit
Disassemblies”. If the LCD panel needs cleaning, re-
move the LCD panel unit following to “LCD panel re-
placement”.
3. Clean the optical parts with a soft cloth. Clean ex-
tremely dirty areas using a cloth moistened with al-
cohol.
Caution:
The surface of the optical components consists of mul-
tiple dielectric layers with varying degrees of refraction.
Never use organic solvents (thinner, etc.) or any kind of
cleanser on these components.
Since the LCD panel is equipped with an electronic cir-
cuit, never use any liquids (water, etc.) to clean the unit.
Use of liquid may cause the unit to malfunction.
Maintenance

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This projector provides security functions such as "Key lock", "PIN code lock" and "Logo PIN code lock". When the
projector has set these security function on, you are required to enter correct PIN code to use the projector. If you
do not know the correct PIN code to the projector, the projector can no longer be operated or started. In this case,
you must reset those function first according to the resetting procedure described below and then check up on the
projector.
Security Function Notice
Resetting procedure
1Disconnect the AC power cord from the AC outlet.
2As pressing the SELECT button on the projector, connect the AC power cord into an AC outlet again. Keep
pressing the SELECT button until the POWER indicator lights continuously.
This is complete the resetting of the security function. The PIN code lock and Logo PIN code lock are reset
as the initial PIN code at the factory and the Key lock function is disabled.
Please refer to the owner's manual for further information of the security functions.
Function Description
Key lock
Locks operation of the top control or the remote con-
trol.
If the Key lock is enabled with top control lock, the pro-
jector can no longer be started.
Initial setting: Key lock function is disabled
PIN code lock
Prevents the projector from being operated by an un-
authorized person.
Initial code: “1234”
Logo PIN code lock
Prevents an unauthorized person for changing the
start-up logo on the screen.
Initial code: “4321”

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Mechanical Disassembly
Mechanical disassembly should be made following procedures in numerical
order.
Following steps show the basic procedures, therefore unnecessary step may
be ignored.
Caution:
The parts and screws should be placed exactly the same position as the origi-
nal otherwise it may cause loss of performance and product safety.
The wiring method of the leads and ferrite cores should be returned exactly
the same state as the original, otherwise it may cause lose of performance and
product safety.
Screws Expression
(Type Diameter x Length) mm
T type M Type
1-1 Cabinet top ass'y removal-1.
1. Remove 1 cover-A and 2 covers-B.
Fig. 1-1
1-2 Cabinet top ass'y removal-2.
Cover-B
Cover-A
1. Loosen 1 screw-A(M3X11) and open the Lamp cover.
2.Remove 1 screw-B(M3X8).
A
Lamp cover
BFig. 1-2

-17-
Mechanical Disassembly
Fig. 1-4
Fig. 1-4a
Fig. 1-3
A
B
B
A
A
A
A
A
Cabinet top ass'y
A
Prism cover panel
1. Remove 6 screws-A(M3X8) and remove the Cabinet top
ass'y.
Prism cover panel
Shield plate
1-3 Cabinet top ass'y removal-3.
1-4 Cabinet top ass'y removal-4.
1. Loosen screw-A(M3X11) and open the Prism cover panel.
(Press 2 places (unhook) and remove the Prism cover panel upward.)
2. Remove 4 screws-B(T3X8) and remove the shield plate.
Press the 2 places
(unhook) and upward
B
B

-18-
Mechanical Disassembly
2AV Panel and Side Panel removal.
1. Remove 5 screws-A(M3X8) and remove the AV Panel.
2. Remove 1 screw-B(M3X6) and remove the Side Panel.
Fig. 2
Fig. 3
3Shield plate top-A removal.
1. Remove 11 screws-A(M3X8) and remove the Shield plate top-A.
A
A
AA
A
A
A
A
A
A
A
AA
A
B
Side panel
Shield plate top-A
AV panel
AA

-19-
Mechanical Disassembly
4-1 Main board ass'y removal-1.
1. Remove 3 screws-A(M3X6) and remove 2 screws-B(M3X6).
2. Remove the Shield plate top-B, Main board ass'y.
A
A
B
B
Shield plate top-B
Main board ass'y
Fig. 4-1
A

-20-
Mechanical Disassembly
4-3 Main board ass'y removal-3.
1. Remove 1 screw-A(M3X6).
2. Remove 2 nuts-B, 2 nuts-C, 1 screw-D and remove the Main PWB Holder
and Shield plate bottom.
Fig. 4-3
A
B
C
CB
Main PWB Holder
D
4-2 Main board ass'y removal-2.
1. Unhook and remove the Button upward.
2. Remove the DEC inlay.
Fig. 4-2
Button
DEC inlay
Shield plate bottom