Panasonic PT-M1083U User manual

. THESE MODELS COMPLY WITH DHHS RUlGS 21 CFR SUBCHAPTER J APPLICABLE AT DATE OF
MANUFACTURE.
There arespecialcomponentsusedin PanasonicColorVideo/Dataprojectorwhichareimportantforsafety.Theseparts
areshadedon the schematic diagram. 1\is essential that these criticalpartsshouldbe replacedwith manufacturer's
specifiedparts to preventX-RADIATION, shock, !ire, or other hazards. Do nol modify the original design without
permission of PANASONIC BROADCAST & TELEVISIONSYSTEMSCOMPANY.
PRECAUTION: To prevent permanent burningof the picture tubes do not operate the projector wilh a still picture for an
extended time period when not necessaryandbecertainto turn power off when notinuse.
Burne9picture tubes are not covered underwarranty.
SAFETY PRECAUTION
GENERAL GUIDELINES
, ,
1. II is advisable to use an isolation transformer in the AC line
, supply before servicing this model.
2. . When servicing observe the original lead dress, especially
in the high vollage circuit. In case of a short circuit, replace
every part which has overheated.
3. Alter servicing observe thai all protective devices such as
rnsulation barriers, fish paper, shields, isolation networks
and fuses are properly installed.
'1, Beiore turning the receiver on, the resistance between the
B+ line and chassis ground should be checked. Coonect
the :. side of an ohmmeter to the B+ lines and the (B side
, ,
10chassis ground.
Each line'should have more resistance than specified, as
'shown in Table 1:
5 Ir the set is not intendedto be used ror a longtime: the
power cord Should be unplugged from ihe AC line outlet.
6. Potentials. as high as 34.3kV are present when this set is
in operation. Removal of the covers involves the danger or
. a shock hazard rrom the set's power supply. Servicing
should not be attempted by anyone who is not thoroughly
familiar with the precautions necessary when working on
higll-voliage equipment
Alwaysdischargethe anodeof theprojeclion tubeto the
selchassi.sbeforehandlingthetube. .
7- .Alter servicing,maketheleakagecurrentchecks10prevent
ashockhazard.
IMPORTANTSAFETY NOTICE
.....
,
~
*:Connectthe (f) side or an ohmmeter to the B- Ijneand the
.:~:Isideto(;hasslsground. --"
Table 1
1

LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two
plug prongs.
Turn on theset.
Measure the resistance value with an ohmmeter between
thejumpered AC plug and eachexposed metallic partsuch
as screwheads, inpullerminals, control shafts, etc.
. Whentheexposedmetallicpart has.a return path to the
chassis. thereading shouldbe between490~2and9M!1.
3.
WhenIhe exposedmelaldoes not havea returnpathto
thechassis.thereadingmustbeinfinite. .
LEAKAGE CURRENt HOT CHECK (See Fig. 1)
1. PlugtheACcorddirectlyintotheACoutlet. Donotusean
isolationtransformerduringthis check.
2. Connect a L5k!2, 10 watts resistor, in parallel with a
O.15~Fcapacitorbetweeneachexposedmetallicpartand
anground.Useagoodground,forexample,awaterpipe.
3. Use a Iligh impedance AC voltage meter (VTVM) to
measurelhepotentialacrosstheresistor.
4. Movetheresistorconnectiontoeachexposedmetallicpart
. .
and measurethe.voltage present. '.
5. Check .thatanypotentialdoesnot exceed0.75 vol! RMS.
. ..
A leakagecurrenttester(SimposonModel229or equiv-
alent)maybe usedin theabovehotcheck,in whichcase
anycurrenlmeasuredmustnot exceed1/2milliamp. In
. caseanymeasurementis outof Ihe iimitsspecified.there
is a possibility of a shock hazard arid the set should
be repairedand recheckedbefore it is returnedto the
customer.
~~
r-'--"-'-'
; Hot-Check Circuit AC VOLTMETER
(i.-:J
I
I1O.15~F.t TO COL.D
j INSTRUMENT'S WATER PIPE
lEXPOSED l_.~ (EARTH GROUNO)
METAL PIIRTS 1.5110.lOW
. -.-
Fig. 1
Fig. 1
.-~.
~~~
X-RADIATION
WARNING: Thepotentialsourceof X-Radiation in the color
videoprojectoris the Highvoltagesectionand
theprojectionlubes.
NOTE: It is important to use an accurate, periodically,
calibratedhigh voltage meter.
1. Set to the bright mode by using menu selector button on
the projector.
Minimize Brightness by using control level adjustment
button.
2. Measure the High Voltage. The high voltage meter should
indiCate 32kV:!:O.5kV. If the upper meter indication is oul of
tolerance, immediate service and correction is required to
prevent the possibility of premature component railure.
(Refer to high voltage adjustment in the manual.)
3. To prevent an X-Radiation possibility, it is essential to use
the specifiedprojectiontube only.
4. To prevent exposure to X-Radiation, the projection tube
shield must be kept in place with power appliedtotheset.
WARNING: Whenusinga projectiontubetestjig lOtservice,
ensure that jig is capable of handling 32.5kV
without causing X-Radiation.
HORIZONTALOSC. DISABLE CIRCUITTEST
This test must be made as a final check before the set is
returnedto thecustomer. .
1. Withthe chassis case removed. supply a nominal 120VAC
to the set, turn on the set.
2. Set the customercontrols to normaloperatingpositions.
3. Press the TEST buttononce on the remole control and
displayInternalcrosshatch of NTSC sync.
4. Shortthe C6046 with ajumper wire.
5. ShorttheA6068 wilh ajumper wire.
Confirm vanish the high voltage. and reaster stop. and
120V:t10Von the voltmeter.
6. If this doesnotoccur,the Horizontal Ose. DisableCircuit is
nol operating. Follow the Horizontal Ose. Disable Circuit
Repair Procedures before the set is returned 10 the
customer.

REPAIR PROCEDURESOF THE HORIZONTAL
OSCILLATOR DISABLE CIRCUIT (Fig.2)
1. Connect a DC vOltagebetween capacitor C604Q::t)on the
E-P.C. board and chass.is ground. If nearly 23V is not
presentonthatpointfindthecause. CheckR6069.D6022,
C6040, R6D68,R6D66and R6067,
2. Connectthe + side01DCvoltmeterto collectorof 06025
and the -sideto TPE5(GND). Thecollectorof 06025
potentialvariesIrom nearly 11V \0 nearly 0.1V whenshor-
ling R6D68.If this doesnot occur,checkC6038,C6037,
Q6020, R6063. 06024, R6060, Q6021, R6062, R6064,
.ADJUSTMENTPROCEDURE OF THE HORIZONTAL
OSCILLATOR DISABLE CIRCUIT
. .. .
Replace R6066 (Protector 2 Adj.) and R6045 (HV Adj.) before
. .
this adjustment. R6066 (Protector 2 Adj.) and R6045 (HV Adj.)
are in~nulacturesspecifiedpartsonly.
1. 8etthefollowingcontrols at the positions indicated.
InputSignal Selector SW (87408) LlNE
R6045(HVAdj.) """"""""""""Fully Counter-clockwise
R6066(Pro/ector2 Adj.) """"""Fully Counter-clockwise
Connect the + (positive) side orDCvoltmeterto TPE1and
- (negalive) side to TPE2 on E-P.C. board.
2. Connect the high voltage meter to anode lead of the
distributer as shown in Fig. 3.
06025. C6042. R6065. 06028, R6078. 06027. C6043.
Q6022. R6071. R6073. R6072, C6044. Q6023, Q6024.
. D6026.R6D70.D6O29,R6074.R6075,C6045.R6061,and
Q6025.
3..Carefully check above specified parts related circuits and
parIs. When the circuit is repaired. try 1he Horizontal
Oscillator Disable Test again.
4. In case that at least one of R6066, R6067, R6068, D6024
and FBT is replaced. follow Adjustment Procedure of
HorizontalOscillator Disable Circuit as follows.
Turn on the Power Switch. and receive a window pattern
signal.
Connect a short jumper between TPE6 and TEPS and
C6046 both side.
Adjust R6045 (HV Adj.) the Brightness control and the
Contrast control to obtain (34kV:tO.3kV) on the high voltage
meier, and obtain (1 .9V.:!:O.1V)on the voltage meter.
3.
4.
5.
CAUTION:
Use only a StalicType01HighVoltageMeIerwhicJ1hasa
5%tolerence at 40kV-

Adjust R6066 (Protector 2 Adj.) slowly clockwise unit shut-
6. down occurs and hold that position.
7. Turn oilihe power switch.
B. Adjust R6045(HV Adj.)slightly counler-elockwise.
9. Turnonthepowerswitch.
10. Adjust R6045 (HV Adj.) slowly clockwise until shut-down
occurs High VoHage shouldbe34kV:!:O.5kV,and 1.9V
t.O.1V on the voltage meter just before shut-down.
, 1. " the readings in step 10 are not confirmed. repeat steps
5 to 10.
Turn ofl the power SWItch.
13. Disconnectthe shortjumperbetweenTPE6 andTPE5.
and C6046both sides.
Turn on the'powerswitch, and adjust (hal the high voltage
is 32.0kV:!:O.5kVwith R6045.
15: Confirmthatthehighvoltagedoesnotctiangeby iurnlng
. .' the Brightnessand Contrast controls.
16. Fix R6066 (Protector 2 Adj.) and R6045 (HV Adj.) with
.' .
bond asillustrated below. (Fig. 4)
Fig.4
tt;~!';:t;;;'-:5'/,;<" "'~:
X-RAY PRECAUTIONS
The Iront area (betweenthe projection tube and the lens.) is
enclosed by a metal box to ensure positive safety during
abnormal and normal conditions when checkinQ and doing
repair work. To fully ensure safety, however. the following
precautions must be observed.
(1) Do not remove the lens.
(2} Be sure to lurn OFF the power when the lens must be
removed and when yO~t could be exposed \0 X.rays
during cleaning and other routine servicing.
(3) Do not remove the lens to check the projection tube for
operation by watching it directly.
(4) Do not remove Ihe LEAD TAPE on the CRTs. (Fig. 5)
(5) Do not remove the METAL COVEA on the CATs. (Fig. 5)
(6) Do not remove the LEAD TAPE LENSes. (Fig. 5)
Fig. 5

~
RCUJTEXPLANATIONCI
~
HorizontalOscillator DisabieCircuit (SeeFig. 6)
For maximum security, this Panasonic Color Projection System has Horizontal Oscillator Disable Circuit which prevent an
excessiveX-Radiationpossibility. .
To monitor the high voltage. the positive DC voltage Irom the cathodes of06022 is applied through R6D68, R6D66 to the base of
06020.. ..
Under normal conditions, this voltage is insufficient to cause 06020 to conduct. If the high voltage increases over the specified
voltage in the worst case, the voltage at the base of 06020 increases, and causes Q6020 to conduct. thus loweringthe potential
at its collector. This lowered collector potential is appliedto the baseof 06021 through R6063 causing it to conduct. The voltage
al thecollectorof 06021 increases. This increasedpotentialis appliedto the baseof 06022 through 06025 causingit to
conduct. Thus lowering the potential at its collector. This lowered Collector potentialis appliedto the base 01 06023 through
R6073. causing Q6023 and 06024 to conduct. The voltage at the collector of Q6024 increases. .This increased potential isleed
back to the base of Q6022 through R6078, 06028 and hold the 06022,06023 and 06024 conducting. The increasedcollector
--.--.:-. ->""<on,., A ,- ---"--' .- k__- _I ,."",n,.,.c:11 .~... co:!n7 A --. ,_I_~ H In n~ft"" ""I
~~~~
potentialat06024is appliedtothebase0106025throughR6074causingilto conduct.
Thus lowering the potential at its collector. . .
. This lowered collector potential at 06025 is applied to thepin5 'ofIC6002through06029.
stopped and the high voltage is shut down. '.
~
IC6002 SPIn
+12V ~ C8044
R6O6O A6070A6072 ~ty 5OV 06029
4.7k Vie 15k 10 MA1S5
A6073
1k
C6037
50V
10
iif; C6O2O
25C3311 ~2
2SC3311A
C~39 D6028 D(rO26 ~
I5OV MA165 MAI062M
1 -=- +5V
112W {:):g R6O78
g< ,~
R6069 D6022 0 ~ ,. C6046
220 TVSRU1 5OV
. 10
- -
- -
F.B.T.Pulse PROTECT1VA.
Fig. 6
~~~~~~~~~~~~
The increasedcollector
Thus, the Horizontal Oscillator is

Automatic High Voltage Regurator (See Fig. 8)
The CRT anode high potential is conducted through the breeder resistance contained to base of transistor Q6018 with Jow
potentiaL The Jow impedance potential conducted by impedance transformer consist of the Darlington combination Q6017 and
Q6018and divider resistances consist of R6044. R6045and R6046,from high imperdance potential, is applied to Ihe 5 pin of the
operational amplifier (lC6001).
Theoperationamplifier(lC6001)comparesthepotentialonthe5pin(IC6001)withthe referencepotentialon the 6 pin (IC6DD1}
highly regulated by R6052 and sends, via Q6010 and Q6011, an error signal to the base of Q6012 and 06013. Thus throttles
theresistanceof Q6012 and 06013 to value that brings thesystemintobalance.
2.
~~~
. 6-
~~~~~

Locationof eachprojectorpart
When using the remote control unit, poinl
toward the window. Alternately, by pointing the
remote control unit at the screen, the IR
receiver will detect the reflected signal.
~~
The power cord which is supplied with
the projector is connected here.
Connecl a power cord thai is raled for
120 V and 60 Hz.
7
~~~~~~~

(j) AGB IN 1terminals
-'1' RGB IN 1 terminals (BNC x 5)
These terminals are used to input analog RGB
signals.
2.) RGB IN 2 terminal (D-SUBHD15-pinx 1)
Thisterminalcanbeusedto input signals directly
from aVGA-compatiblepersonalcomputer,
withouttheneedfora videosignalinterface.
~: LINEIN/OUTterminals (BNCx2)
Theseterminalsareused10inputandoutputvideo
siQnals.
4" S-VIDEOINterminal (Mini DIN4-pin)
This terminal is used to input the Y andC
separation signals.
'5' Audio IN/OUT terminals (RCA x 4)
Theseterminals are used to input and output
sound in stereo.
The projector remote control unit cannot be used
\0 switch the audio source.Furthermore.the
projector is not equipped with built.in speakers.
:'. . " '"
. . ' .
'}~iiri{'l:'; :~~';ii::" ::,..: :~' :',
~~
U>T-M1085U1PT-M1083U
Self-diagnosis function display
Ifanabnormalityisdetectedinsidethe
projector,a Iwo-digitcodeisdisplayedhere.
Powerindicator
This indicator illuminates green when tho proj~tor
is in operation mode(whenthe main power switch
and the power button on the remote control unit
are both ON). In standby mode.(when only the
main power switch is ON). the illumination color is
red.
I§) Signal selector connector
(I) REMOTE IN 2 connector
@ LINE IN/OUT terminals
@REMOTE IN 1 connector (D-SUB 9-pln x 1)
This connector isusedwhenconnectingan
exlernal control circuit.
ev REMOTE IN2 connector (D-SUB15-pinx 1~
Thisconnectoris usedwhenconnectinga
personalcomputerinorderto makeadjustments
totheprojectorduringsetup-Itshouldonlybe
usedbya qualifiedtechnician.
Signalselectorconnector
This connector is reservedfor use with a signal
selector which is to be developed in the future.\I
cannot be used at Ihe present.
ID
@REMOTE 3 IN/OUT terminals (M3 plug)
Theseterminalsareusedto connecttheremote
controlunitto theprojectorusing the accessory
remote controlcable.
8
~~~

Location of each remote control unit part
ESC (Escape) button --
This button is used to clear the screen of any
characters that arebeingdisplayed.
STATUSbutton --- IThis button is used 10display the timing of
signalswhich are being input and to list data
that hasbeenrecorded.
POWERbutton" ..-.....---..-
This button is used to turn the power supply for
the projector on or to the standby mode.
Input selector buttons L
These buttons are used to select the source for
input signals received by the projector.
It is not possible to switch over the audio signal
source"
Numericbuttons--.---..
Thesebuttonsare used 10input the ID number Ifor the remote control. -
Control patternswitch "_'_00""'" -;
This switchisusedtochangethefunctionsof
some of the remote control keys" It is only for
use by a qualified technician, and shouldalways
beleftal the NORMAL position during ordinary
use.
ASPECTbutton
This switch is used to switch the projector to one
of three modes.II is used when settingfunctions
Isuch as the aspect ralio"
ONSCREENbutton oo ,,---J
Thisbuttonisusedtoturntheon-screendisplay
ofcharaclersonandoff.
SYSTEMSELECTORbutton ......-.-..............-
signal between VIDEO and S-VIDEO. I
PNR(PicturenoisereducUon)button - .J
This buttonisusedtoswilchin coming video
This buttonis used tolurnthepicturenoise
reduclion function on and off.
Picture adjustment buttons
Thesebuttonsare used to
switch the projector to one of
the picture adiustment modes
I
FUNCTION MENU button
This button is usedto set
the 10 number, raster swing,
baud rate and V-shift.
9
~

VOLUME+and VOLUME-buttons
Thesebuttonsareusedtocontroltheoutput
levelofthesignalfrom the AUDIO OUT
I
SECOND button
This button is reserved lor operation of a signal selector which ISto be developed in the future. The
function ollhis key changes when the remole control unit is being usedbyaqualJfiedtechnicianto record
signals.
Remote control cable terminal
This terminal is usedto connect the accessory
remote control cable.
CONTROL LEVEL buttons
Thesebuttonsare used to control the
adjustment level in any of the picture
adjustment modes.
This buttonis usedto turn offthesoundwhich
is being output from the AUDIO OUT terminals.
IDALL button
This button is used to set the 10 number of the
remotecontroltoALL.
ID SELECT button
This button is used to record an 10number for
theremotecontrol.
10 -
~~~~~

Buttons that canbeusedinservicemode
POWER button ~Thisbuttonisusedto turn the power
supply for the projector DnDrtDIhe
stand-by mode.
Input selector buttons -'-'-"-"'--' '-"'",-
These buttons are used to select the ~
source for input signals received by the
projector.
RASTER SIZE button
Thisbuttonisusedto adjust the height and
width of the picture on the screen.
control operation mode between normal
operation mode and service mode. (If you
want to switch to seNice mode. set Ihe
servicemodeswitchinsidethebattery
compartmentto"ON".)
This butlon is used to adjust the position 01
the center of the picture.
This button is usedto registerdalasuchas
convergence adjustment data.
Three modes canberegisteredforeach '"
differenttypeof signal. /Whitebalanceadjustment mode buttons -.----
Thesebullonsareusedto switchtowhite
balanceadjustmenlmode.
~
RGBbuttons
Thesebuttonsareusedto select the color
ror adjustment In convergence adjustment
modeandothermodes.
"' "" , 1 . " .."'.,
This button is used to switch the
color temperature setting belween
LOW, MID and HIGH.
~~~~~

BlK button
Thisbuttonisusedto crop
unnecessarypartsfromthe
TEST button
~
I PT-M1085U1PT-M1083U
screen.
'" CLAMPPOSITIONbutton
~ This button is used to change theclamp
~ position for the black level of the video signal.
)1unit I
Light button
Thebuttonson the front of the remote control
unit willbe illuminated while this button is
Ipressed. The buttonilluminationwillswitch off
approximately ten seconds after this buttonis
released.
~ Function selection switch
-. TIlesettingfor this switch determines whether
the operation mode is changed or not when the
service mode switch is operated.
12 -
I
~~~~~~

System configuration examples
~~~~~~~~~

PT.M1085U1PT-M1083U I
Exampleof a system connected to the RGB IN 1terminals
Example ofvideo input
source
NOTE:
. The projectoris nol equippedwith built-in speakers,so youwill need to connect an externalamplifierand
speakers.
The audiosourcefortheprojectorcannotbechanged.
.
~~~~~~
Projector
~~
i
~

Example of a system connected to the RGB IN 2 terminal
ToRGBIN2
Exampleof asystem connected to the LlNE/5-VIDEO terminals
NOTE:
. The projectoris notequipped with built-in speakers,soyou will need to connect an external amplifier and
speakers.
. The audiosource for the projector cannot be changed.
Pin1N~.-Sign:~a~~-
12 Green
3 Blue I4 GND
5 GND!
6 RedGND I7 GreenGND
8 BlueGND :
9 GND I
10 GNO
11 GND
12 GND
13 H-Sync
14 V-Sync
15 GND
Personal computer
& 105 1
Projector
VCR with S-VIDEO terminal
~~

Connecting to a S-VIDEO signal source
Projector terminal
IN
NI 0=1011\0£
This is used to screw and lock onto the
S.vIDEO terminal ontheprojector.
TheseconverSion adapters make it possible to
increasethe distance between the S-VIDEO
terminal connections using BNC cables.
Points to note:
1. The cables used should be of the samelength.
and this length should not exceed328 feet
(100 m). Exceeding this length will have an
adverse effect on Y/C signal transmission.
2. The connectors are color keyed; the Y signal
connector ISred and the C signal connector IS
black.
~
VCRwith S-VIDEO
terminal
If the S-VIDEO output terminal on the VCR is a
screw-type terminal. the adapter should be
attached before connecting the cable to the
terminal.
Care shouldbeexercisedtoensureproper
"red"to "red"and"black"to "black" cable
connection.
To prevent connector damage or loss, do not piace too
much strain on the S-VIDEO connectors once they are
connected.
3.
IN/OUT
4-3
1
.:0:
2 PinNo.
~~~

Connectinganadvanceddigitalscanningconverter(soldseparately)
Aseparateadvanceddigital scanning converter(ET-100DS)can be usedtoconvertthesignalsfromthevideo
sourceto RGBsignals (with a horizontalscanningfrequencyof 31.5 kHz).
Colorvideocamera
Advanceddigital
scanningconverter
(ET-100DS)
VCRwith S-VIDEO terminal
. .
, ,", "
", ,
"!.~'~'}'::}<": ...;1:">:' ."':. :
Projector
17
'.
~

PT-M1085U1PT-M1083U I
Disassembly Instructions
WARNING:
1. Before disassembly. ramove the AC plug from the wall oullet.
2. Whenturningover a P.C. boardto adjust it. be sureto lay on insulatingmaterialunderit in order to prevent shorting.
3. P.C.boardsand wires should not be pulled forcibly, butbe handledcarefully.
4. Printedboardsand connectors should be handledwith care-aviodhandlingthem forcibly!
5. When handlingthe E, K and P-P.C.board with the power ON. there is a risk of an Electricshock if you use the COLD side
heat sink while working on the HOT side of the chassis.
CIRCUIT BOARD LAYOUT
H-P.C.Board-
CG-P.C.Board
CM-P.C.Board
.SC-P.C. Board
-LC-P.C. Board
-A-P.C. Board
MA-P.C.Board
- V-P.C.Board
'DC~P.C.Board
DA.P.C. Board