Panasonic PT-302 User manual

ORDER NO. VED86100027C3
ervice Manual
Colour Video Projector
PT-302
chassis No. Q5
The service technician is required to read and follow the ‘‘Safety Precautions’ and ’’Important Safety Notice” in this
service manual.
Specifications
Power Source: AC 220V ~ 240V, 50/60 Hz 4318 mm (170 inch) Picture size:
Power Consumption: 179W (average) 5102 mm (200 7/8 inch)
Projection T ube: 7 inches (179 mm) specially developed 5080 mm (200 inch) Picture size:
High-Brightness liquid cooled 5963 mm (234 3/4 inch)
CRTs (R, G, B). 6350 mm (250 inch) Picture size:
Lenses: Double Focus, Three F 1.0 145 7400 mm (291 11/32 inch)
Lenses (HYBRID) 7620 mm (300 inch) Picture size:
Resolution: Video...... 650 TV Lines (typical) 8835 mm (345 27/32 inch)
RGB........ 1000 TV Lines (typical) Light Flux: 500 lumens (typical) at white peak
Video Input Level: 140.3Vp-p 75Q Operating Ambient
Line in/out Level: 1+0,3Vp-p 75Q or high impedance Temperature: 32°F ~ 104°F (0°C ~ +40°C)
RGB Input Level R: 0.74+0.3Vp-p 752 Operating Ambient
G: 0.7+0.3Vp-p 75Q Humidity: 20% ~ 80%
(GSYNC: 140.3Vp-p 75Q) Supplied Accessories: AC Cord (3 types)
B: 0.7+0.3Vp-p 75 Mounting kit (1 set)
H/HV: 0.3 ~ 6V, high impedance Dimensions: Height: 290 mm (11 13/32 inch)
V: 0.3 ~ 6V, high impedance Width: 576mm (22 11/16 inch}
Screen Size: 3810 ~ 7620 mm (150 ~ 300 inch) Depth: 606 mm (23 29/32 inch)
Throw Distance: 3810 mm (150 inch) Picture size: Weight: 77 \|bs. (35 kg)
4528 mm (178 1/4 inch)
; Specifications are subject to change without notice.
Weight and dimensions shown are approximate.
a
rs Fy
5
Panasonic
Matsushita
Elecite
Weds
Co.

PT-302
CONTENTS
FEATURES oc. o's Sys ase 8 ad Reece che erarae Beddacs ar ahaa Ay. eee a eee RO oes ee A 2
SAFETY PRECAUTIONS 225.25 iecce Sie 5 ata ela alee le esti ee tee as Wwe Gee a Ste 9 She 3
LOCATION OF CONTROLS, OPERATIONS AND
CONNECTION OPTIONAL EQUIPMENT........... 0.00 cue ue c ences 4~8
DISASSEMBLY INSTRUCTIONS ........... 00. ccc cere eee ne eres 9,10
MAIN PARTS LOCATION CHART .......... 0... cc cece cece ee tee ere eens 11
CAUTIONS FOR SERVICING ......... 0... ccc ee ee eee eens 12,13
FIELD ADJUSTMENTS. ..... 2... .. eee e ee eee eee eee eee eee ane 14 ~20
INSTALLATION/ADJUSTMENT PROCEDURE ..............0 000 ec ucuae 21 ~ 32
LOCATION OF TEST POINT AND CONTROLS ............ 00 veer e eee eee 33 ~ 35
BLOCK DIAGRAM). 6.5.4.0 6-06 eee g ow be Ses COS Se EO Hews Gee Rae 36 ~ 38
INTERCONNECTION... 0... 0... cc cee eee eee ee ee eee eee ee eee 39, 40
TERMINAL GUIDE OF IC’S, TRANSISTOR AND DIODES. ..............0 0000 ae 41
CIRCUIT: BOARD i oie: oa hia ish ae. hb Gee ie ee SPR ew le Ge Oe bala wee 42 ~ 54
SCHEMATIC DIAGRAM ......... 0.0. ecw ee ee ee eee eee anaes 55 ~ 74
F/K/P/Q/V/X-BOARD Sections. ......... 0.00 cece eee ee eee eee ee ees 57, 58
M-BOARD Section ....... 0.0... ce eee eee ewe eee ee eee eens 59, 60
B/S/LR/LG/LB-BOARD Sections... .......... 00 cc eee uceceucuveees 65 ~ 68
C/J/TR1/TR2-BOARD Sections... 2.2... 0.0... cece ee eee ee 69 ~ 71
A/G/R/T-BOARD Sections... 0.0... 0... cece ee ee et eee eee 72 ~74
EXPLODED: VIEWS en. 5: ees cece ese el a a ote eae eae eee. AS. rete bl ce 75 ~ 80
TROUBLESHOOTING. .... 0.0... cece ccc eee eee te eee 81, 82
REPLACEMENT PARTS LIST... 0... .. eee ee ee eee eee ees 83 ~ 110
FEATURES
1 Superb bright picture: High luminance output: 5 Improved raster quality:
500 lumens (typical) at white peak High voltage regulation characteristic: 0.3 MQ
2 Superb resolution: 1000 Lines (RGB) (typical) 6 eee installation and front/rear projection easily
selectable.
650 Lines (Video) (typical)
RGB character reproduction:
e Ceiling mount/front projection
e Ceiling mount/rear projection
equivalent to 2000 characters e Floor placement/front projection
(80 x 25) e Ceiling mount rear projection with mirror
3 Compact size and light weight (35 kg, 77 Ibs), for easy ¢ Floor placement rear projection with mirror
7 Wide-range computer compatibility
placement/installation.
aor . : . : 8 Four broadcast system capabilit
4 Compatibility with various signal input sources: sys Spe arty
PAL, SECAM, NTSC and M-NTSC 4.43
VTR/VCR Video Disk
Video Camera RGB Computer
TV Tuner

SAFETY PRECAUTIONS
GENERAL GUIDELINES
1. It 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 voltage circuit. In case of a short circuit,
replace every part which has overheated.
3. After servicing observe that all protective devices such as
insulation barriers, fish paper, shields, isolation networks
and fuses are properly installed.
4. Before turning the receiver on, the resistance between
the B+ line and chassis ground should be checked.
Connect the © side of an ohmmeter to the B+ line and
the @ side to chassis ground.
Each line should have more resistance than specified,
as follows:
B+ (B—) Line Minimum Resistance
206V 10kQ
116V 3kQ.
27V 30022
17V 2002
12V 10022
10V 3Q
* -17V 150Q
* — Side to ground
5. If the set is not intended to be used for a long time, the
power cord should be unplugged from the AC line outlet.
6. Potentials, as high as 32.5 kV are present when this
set is in operation. Removal of the covers involves the
danger of a shock hazard from the set’s power supply.
Servicing should not be attempted by anyone who is not
thoroughly familiar with the precautions necessary when
working on high-voltage equipment.
Always discharge the anode of the projection tube to
the set chassis before handling the tube.
7. After servicing, make the following leakage current
checks to prevent a shock hazard.
LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the
two plug prongs.
2. Turn on the set.
3. Measure the resistance value with an ohmmeter between
the jumpered AC plug and each exposed metallic part
such as screwheads, input terminals, control shafts, etc.
When the exposed metallic part has a return path to the
chassis, the reading should be between 490 k{2 and
9 M&2. When the exposed metal does not have a return
path to the chassis, the reading must be infinite. —_
PT-302
LEAKAGE CURRENT HOT CHECK (See Fig. 1)
I
Plug the AC cord directly into the AC outlet. Do not
use an isolation transformer for this check.
. Connect a 2 kQ, 10W resistor, in series with an exposed
metallic part on the receiver and an earth such as a
water pipe.
. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
. Check each exposed’ metallic part, and measure the
voltage at each point.
. Reverse the AC plug in the AC outlet and repeat each of
the above measurements.
. The potential at any point should not exceed 1.4 volts
RMS. _ In case a measurement is outside of the limits
specified, there is a possibility of a shock hazard, and the
receiver should be repaired and rechecked before it is
returned to the customer.
HOT- CHECK CIRCUIT
AC VOLTMETER (High Impedance)
TO WATER PIPE
INSTRUMENT ’S 2kn, LOW J (EARTH)
EXPOSED
METALLIC PARTS
Fig. 1
X-RADIATION
WARNING: | The potential source of X-Radiation in the
color Projection System is the High Voltage
section and the projection tubes.
NOTE: it is important to use an accurate, peliodically,
calibrated high voltage meter.
1. Turn the Brightness control fully counterclockwise.
. Measure the High Voltage. The high voltage meter
should indicate 32 kV + 0.5 kV. If the upper meter
indication is out of tolerance, immediate sevice and
correction is required to prevent the possbility of
premature component failure. (Refer to hich voltage
adjustment in the manual.)
. TO prevent an X-Radiation possibility, it ig esen tial to
use the specified projection tube only.
. To prevent exposure to X-Radiation, the groy ection
tube shield must be kept in place with power ap lied to
the set.
WARNING: When using a projection tube tet jig for
service, ensure that jig is capable otha Nndling
32.5 kV without causing X-Radiati«n.

PT-302
LOCATION
OF
CONTROLS,
OPERATION
AND
CONNECTING
OPTIONAL
EQUIPMENT
LOCATION OF CONTROLS
AC IN
MAIN POWER SWITCH
IMPEDANCE SELECTOR SWITCH
LINE IN/OUT TERMINAL
VIDEO INPUT TERMINAL
G/EXT
SYNC
SELECTOR
SWITCH
V
INPUT
TERMINAL
H/HV INPUT TERMINAL
B INPUT TERMINAL
G/G SYNC INPUT TERMINAL
R INPUT TERMINAL
BLUE SELECTOR
@prower SWITCH
SWITCH
TV SYSTEM
SELECTOR
SWITCH
COLO
R
CONTRAST
SHARPNESS
OPERATION
TO
Operate
the
projector
switches
@
and
@
must
be
turned
ON,
and
switch
@
must
be
set
to
the
proper
input
signal
type.
Note:
When
the
separately
supplied
remote
controller
(ET-12R)
is
connected
to
the
video
projector,
switches
@
through
@
and
@
through
@ are
inoperable.
Please use
the
remote
controiller
for these
functions.
= AS

Switch. PURPOSE
MAIN POWER
SWITCH
OFF BL = ON Switches main power supply ON/OFF.
MAIN POWER
Power ON/OFF switch.
POWER SWITCH
REMOTE BH = ON This switch is set to the OFF position, when the remote control
is in use.
RGB LINE VIDEO VIDEO---Push this button to view signals input via the VIDEO
input terminal.
LINE ---Push this button to view signals input via the LINE
input terminal.
RGB_---Push this button to view signals input via the RGB
INPUT SELECTOR input terminal.
INPUT SELECTOR
SWITCHES
This switch is operable only when RGB signals are being re-
NORMAL . a ceived. Use this switch when the blue portion of the picture is
weak.
FINE BLUE + NI) NORMAL ---Normal blue.
BLUE MONO- FINE BLUE -:--A finer , easier-on-the-eye, blue.
BLUE MONO:-:--White picture on a blue back ground.
Note: When Linear or TTL RGB signals are input at inappro-
BLUE
SELECTOR
priate
levels,
the
FINE
BLUE
and
BLUE
MONO
modes
might not operate properly.
BLUE SELECTOR
SWITCH
SECAM , This switch is normally set at AUTO.
PAL. i i ity i
TV SYSTEM igre: eiedel if the isk eae bad . the use of dubbed
SELECTOR SWITCH Nee: pes, etc., reception may not be satis ac ory.
AUTO * In that case, set the switch to the appropriate input signal using
a screwdriver.
SYSTEM
The click-stop indicates standard, brightness.
=== (y EDO Adjust to the appropriate brightness level for current viewing
- conditions.
Decrease Increase
EC ds Adjust to a desirable color intensity.
Decrease Increase
E=0 ==) Es. To obtain a sharper picture rotate the control clockwse.
For a softer picture rotate the control counter-clockwse.
soft sharp
|
EC
DO0-
Adjust
to
a
comfortable
viewing
level,
a
slightly
less
iniense
Low High picture is easier on the eyes.
Color Color
0 eB Adjust for proper skin tone.
red gree
If the picture rolls, as shown, adjust
E) ED ttre contro uP or DOWN until it
UP DOWN stabilises.
Sh

PT-302
CONNECTING OPTIONAL EQUIPMENT
Connect optional equipment (example) according to following illustration.
CASE 1: Connection to a video source —_—TV Monitor
Video Projector
HIZ M0750
VIDEO IN aa
eT
Video
Camera
Hifi VCR
beveneaienenenene 2 es |
TV Tuner
PERSONAL COMPUTER
RGB INTERFACE (optional)
ET-11G/12G
=
—
SELECT THE
APPROPRIATE
SYNC TYPE
G. G/SYNC

CASE 3: Connection to the remote controller ET-12R (optional)
REMOTE CONTROLLER (optional) hee
ET-12R
ERTAMIPILIER
Presentation System
This is the most orthodox VTR playback
system. Various variations can be de-
veloped on this system according to the
required applications.
Applications:
®@ Conference Rooms
® Classrooms
@ Public Areas
REMOTE IN
Note:
The PT-302 operates on positive or
negative SYNC. The SYNC inverting
switch is factory preset to the ‘““NOR-
MAL” position for negative SYNC.
For positive SYNC set the switch to the
“REVERSE” position.
During installation set the SYNC invert
switch for the appropriate SYNC polarity.
~#—_
REMOTE
CONTROL
CABLE
(opticonal)
ET-11C15.......
ET-11C30.......
ET-11C50.......
50 feet (15 m)
100 feet (30 m)
164 feet (49.5 m)
GRRE EE
Entertainment System 1
This system is ideal for use for parties,
ceremonies, etc. to’ be held in large
places. Great effects are possible with
the powerful video images from colour
video projectors, when combined with
video cameras and audio equipment.
Applications:
@ Banquet Halls
@ Lounges Discos
Video Camera
aaa
1
Remote Control _ Monitor
Unit
Effects
AV Switcher
Controller
Monitor Microphone
[ ¥y 7 ---
aa
Es
Controller
Audio
Mixer
Amp
- Monitor Pa
i = i Wireless
Microphone
Tuner Wireless Amp
ERSTAIMIPILIERS
Business Application
This system is designed to concentrate
on data presentations for business, con-
ferences, showrooms, etc. Its superb re-
solution and capacity to match various
types of personal computers make it ideal
for upgrading office-automation systems
and diversifled video/data services.
Applications:
® Conference Rooms
@ Training Areas
@ Information Displays
ae I en HO
Video Projector
-————__——]
7 feos]
[ ¥ Special
Video Camera _ Monitor
Generator AV Switcher
Gal Sa — Pcl Screen
Hi-Fi VTR Monitor Video polices
ene
grttctt
His
T
ee oe
ices cea
v
ae
Had Vo
'
t
!
VTR !
rr en
i
j
7 Video Projector
i
i
I
OM eR Hm Mtn SHOE RON ONG nl en nenpncenteeon omen
:
RGB Interface ——
Computer ~T |
Be cece enw ae eer rannsieramanraes
crane
BREE EE &
Entertainment System 2
This system is particularly suited to such
recreational facilities as bars, restaurant,
dance clubs, etc. A wide variety of atmos-
pheric effects can be produced. When
used together with stereo sound, a re-
laxed aura of “background video“ and
“mood” music, or dynamic video images
with music with a beat to match.
Applications:
@ Lounges Discos
@ Restaurants
Hi-Fi VTR
Monitor
Controller
Hi-Fi VTR
r-
U
!
Monitor '
Controller a
a a eer 1
‘
—[ J O
Monitor Microphone Turntable
a a
ERIAIMPPILIERS
Educational System
Ideal for a wide range of educational acti-
vities, particularly as an effective teaching
aid.
Applications:
@ Classrooms
® Auditoriums
@ Lecture Halls
Screen
{ Video Projector
Ce
| AV Switcher =
reas)
rot
Jt
Audio Mixer Amp
PT-302
rv
t
1
-~ eall--!
Microphone
AV Switcher
aay
[
=
|
Video shea ctor

PT-302 PT-302
DISASSEMBLY INSTRUCTIONS 5) “G”-Board 5. HOW TO REMOVE THE PROJECTOR TUBE
1. HOW TO REMOVE THE TOP COVER 4, HOW TO OPEN THE PRINTED CIRCUIT BOARD © Remove 2 screws @ in fig. 8. (WHEN RED)
1) Open the cover of control panel. 1) Cand D, V-Boards @ Then pull the G"-Board toward the back side of 1) Remove the two retaining 2 screws (L) from the tube
2) Remove 3 screws () in fig. 2. @ Loosen 2 screws ©) to counterclockwise by 90° in the deck, and carefully lift it to open the 'G” Board. shown in fig. 12.
3) Then pull the Top Cover toward the back side of the fig. 5. 2) Remove the lens grill shown in fig. 3. (Remove 4 screws
deck and carefully lift it for removal. @ The lift the rear of the chassis to open the “C",- ®).
3) Remove the anode lead @) from the high voltage
distributor shown in fig, 13.
4) Remove the LR printed circuit board (N) in fig. 13.
5) Remove the retaining screw of the neck shield ©) and
“D" V-Board.
D-Board-7”
M-Board
3
screws
2
screws
G-Board
remove
the
neck
shield
©
in
fig.
13.
w
@
(3)
6)
Remove
the
retaining
screw
of
the
deflecting
coil
@
Fig.
8
and draw
out
the
centering
magnet
®
and
the
diflecting
Cover
of
6)
“K’’-Board
coil
S)
in
fig.
13.
<
control
panel
@
Remove
the
Front
Panel.
7)
Remove
the
grounding
lead
from
the
tube.
@
Then
carefully
pull
and
lift
the
Terminal
Panel
for
8)
Remove
the
4
retaining
screws
@® from the
tube
and
removal
in
fig.
9.
draw
it
out
shown
in
fig.
14.
@
Remove
2
screws
(1)
in
fig.
10.
2)
“A’
-
“B"-Boards
@
Then
lift
and
pull
out
the
““K’'-Board.
@
Remove
a
1
screw
©
in
fig.
6,
and
remove
the P.C-Board fixing metal.
Fig. 2 @ Then carefully pull and lift the ‘A’ and B” Boards
for removal.
2. HOW TO REMOVE THE LENS GRIL
1) Remove 4 screws in fig. 3.
2)
Remove
the
Lens
Gril.
Terminal
anel
Lens
Gril
pi
P.C Board Fixing Metal
Fig. 6
3) "F’-Board
@ Remove a 1 screw © in fig. 7, then open the F”-
Board.
Fig. 3
3. HOW TO REMOVE THE CONVERGENCE
CONTROL COVER
1) Open the cover of control panel.
7) “P” and ‘‘Q’’-Boards
@ Remove the Front Panel! and Terminal Panel.
@ Remove 2 screws YQ) in fig. 10.
@
Remove
4
screws
()
in
fig.
11,
and
lift
the
box
cover.
4
screws
(T)
@
Then
open
the
‘’P”’
and
‘‘0’'-Boards.
ee
2) Remove a1 screw ©) in fig. 4.
3) Then pull the Convergence Control Cover toward the
control panel side for removal.
Cover of Convergence Box cover
control panel control cover
1 screw ©
Fig. 7
4) “M"-Board
@ Remove 3 screws @) in fig. 8.
@ Then pull the ‘’M’’-Board toward the back side of
the deck, and carefully lift it to open the ‘‘M"’-Board.,
Fig.
4
Fig.
14

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Fig. 15

PT-302
CAUTIONS FOR SERVICING
HORIZONTAL OSC. DISABLE CIRCUIT TEST REPAIR PROCEDURES OF THE HORIZONTAL
This test must be made as a final check before the set is OSCILLATOR DISABLE CIRCUIT
returned to the customer. 1. Connect a DC voltmeter between capacitor C1413 +
1. With the chassis case removed, supply a nominal 120V on the D-PCB and chassis ground. If approximately
AC to the set, and turn the set on.. 150V is not present at that point find the cause. Check
2. Set the customer controls to normal operating positions. R535, R591, R1430, R534, C1413 and D1408.
3. Locate Q1404 and short it’s collector to the emitter 2. Connect a DC voltmeter between capacitor C518 + on
with a jumper wire. Confirm that this shorts the high the C-PCB and chassis ground. C518 + potential varies
voltage and that the raster disappears. from nearly OV approx to nearly 4V approx when
4. |f this does not occur, the Horizontal Osc. Disable shorting Q1404 (C-E). If this does not occur, find the
Circuit is not operating. Follow the Horizontal Oscil- cause. Check R530, R531, R537, R538, R539, R540,
lator Disable Circuit Repair Procedures before the set is R541, R542, R543, R544, C513, C518, C519, C520,
returned to the customer. D507, 0510, Q511 and O512.
NOTE: The power on/off switch must be turned off and 3. Carefully check the above specified parts and related
then on to restore operation. circuits and parts. When the circuit is repaired, try the
Horizontal Oscillator Disable Circuit Test again.
4. In case that at least one of R535, R591, R534, D507,
and the FBT is replaced follow the Adjustment Pro-
cedure for the Horizontal Oscillator Disable Circuit as
follows.
+27V
To 1C401
Pin ®
R542 R541
Q511
2SB709A 0.01 D1408 R1430
RvU1 220
R531. +} C513. +] C518 FBT PULSE
Q512
2SD601A QA207M3
—i2-—

ADJUSTMENT PROCEDURE OF THE HORIZON-
TAL OSCILLATOR DISABLE CIRCUIT
Replace R534 (Protector Adj.) and R1419 (HV Adj.)
before this adjustment. But R534 (Protector Adj.) and
R1419 (HV Adj.) are only manufactures specified parts.
1. Set the following controls at the position indicated.
Input Selector SW. (S3003)...........000.. LINE
TV-System Selector SW. (S8002).......... AUTO
Impedance Selector (75/HIZ) SW. (S71) .. 2.0000. HIZ
R1419 (HV Adj.) .........0.0.. Fully clockwise
R534 (Protector Adj.) ..... Fully Counter-clockwise
Connect the ® (positive) side of DC voltage meter
to and © (negative) side to PGB on D-PCB.
2. Connect the high voltage meter to anode lead of the
distributer as shown in Fig. 17.
3. Turn on the Power Switch, and receive a monoscope
pattern signal.
4. Connect a short jumper between BG anc TPM2 §
5. Adjust R1419 (HV Adj.) the Brightness control and
the Contrast control to obtain (33.5 kV + 0.3 kV) on
the high-voltage meter, and obtain (1.8V + 0.05V) on
the voltage meter.
CAUTION:
Use only a Static Type of High Voltage Meter which
has a 5% tolerance at 40 kV.
6. Adjust R534 (Protector Adj.) slowly clockwise until
shut-down occurs and hold that position.
7. Turn off the power switch.
8. Adjust R1419 (HV Adj.) slightly clockwise.
9. Turn on the power switch.
10. Adjust R1419 (HV Adj.) slowly counter-clockwise
until shut-down occurs High voltage should be 33.5 kV
+ 0.5 kV, and 1.8V + 0.05V on the voltage meter just
before shut-down.
11. If the readings in step 10 are not confirmed, repeat
steps 5, 6 and 7 again.
12. Turn off the power switch.
13. Disconnect the short jumper between Wajid and say .
14. Set the 75/HIZ selector SW. (S1) to 75Q.
15. Turn on the power switch, and confirm that the high
voltage is 32.0kV+ 0.5 kV.
16. Confirm that the high voltage does not change by
turnning of the Brightness and Contrast controls.
17. Fix R534 (Protector Adj.) and R1419 (H.V Adj.) with
bond as illustrated below.
(R534, R1419)
PT-302
DISCONNECTION OF ANODE LEAD FROM
THE DISTRIBUTER
Anode
lead
Fig. 17
X-RAY PRECAUTIONS
The front area (between the projection tube and the lens.)
is enclosed by a metal box to ensure positive safety during
abnormal and normal conditions when checking and doing
repair work. To fully ensure safety, however, the fol lowing
precautions must be observed.
(1) Do not remove the lens.
(2) Be sure to turn OFF the power when the lensmust be
removed and when you could be exposed to 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 the LEAD TAPE on the CRTs.
(5) Do not remove the METAL COVER on the CFTs.
LEAD TAPE
WAFRANING
WARNING
LABEL
WARNING
LABEL
= 43-—

PT-302
FIELD ADJUSTMENTS
Note:
1.
When
a
screwdriver
is
needed
during
adjustment,
use
a
non-metallic
screwdriver
to
prevent
unexpected short-circuits.
LOWER SIDE
Transformer
VL bh bbbbhhhhhidihihihihhddukuke
2. Transformer core position. (Application for both Field
Adjustment and General Alignment.) Unless otherwise
noted, a transformer core which has two tuning peak
points should be adjusted at the lower position as
shown in Fig. 19.
UPPER SIDE
CZithbidbiibidkhdhhhhdihded
1.DC VOLTAGE CONFIRMATION
1) Set the following controls at the positions indicated.
Brightness control VR (R3009)......... Minimum
Contrast control VR (R3011) .......... Minimum
2) Connect a DC voltmeter between each Test Point and
aa teyda(carth).
3) Check below for the indicated test points and their
specified voltages. (See Table 1)
Test Points
Pin @) of connector D14 115.5V = coy
Pin
©
of
connector
C4
115.5v
*
ey
Voltage
Pin © of connector C4 26V + 1.0V
Pin @ of connector C4 17V+1.0V
Pin @) of connector C4
—17V+£1.0V
12V £0.5V
Table 1
2. HORIZONTAL CIRCUIT ADJUSTMENT
1) Set the following controls at the positions indicated.
Input Signal Selector SW. (S3003) ......... VIDEO
TV-System Selector SW. (S8002).......... AUTO
G/EXT Sync Selector SW. (S2) ......... Ext. Sync
NTSC H. Hold control VR (R520) ......... Centre
PAL/SECAM H. Hold control VR (R519) .. . . Centre
RGB Horizontal Hold VR (R523).......... Centre
Brightness control VR (R3009) ........... Centre
Contrast contro! VR (R3011) ............ Centre
1)-1.
Connect
a
Resistor
Jumper
(10k)
between
filigss
and | TPB11 |
1)-2.
Connect
a
Jumper
between
Suds]
and
earth.
Fig. 19
2) Bvgio) tek fe) o] ee
1. Receive a monoscope pattern signal (NTSC).
2. Connect a capacitor (1uF/50V) between fiiexmand
earth.
3. Adjust the NTSC H. Hold control VR (R520) to
stabilize the picture.
3) green ole) Sa NS ter h)
1. Receive a Phillips pattern signal (PAL).
2. Connect a capacitor (1uF/50V) between fIGERH and
earth.
3. Adjust the PAL/SECAM H. Hold control VR (R519)
to stabilize the picture.
4) Biket=w tele)
1. Set the Input Signal Selestor SW. (S3003) to the
RGB position.
2. Receive an RGB signal from an RGB signal generator.
(The horizontal frequency of the RGB signal should
be in 15.750 kHz + 0.25 kHz range.).
3. Connect a capacitor (1uF/50V) between GERM and
earth.
4. Adjust the RGB H. Hold control VR (R523) to
stabilize the picture.
3. SUB CONTRAST ADJUSTMENT (1)
1) Set the following controls at the position indicated.
Colour control VR (R3002) ........... Minimum
Sub Contrast control VR (R353) .......... Centre
2) Receive an colour bar signal.
3) Connect an oscilloscope between QREM and earth.
4) Adjust Sub Contrast control VR (R353) to achieve
0.7V + 0.05V on the oscilloscope as shown in Fig. 20.
—14—

Fig. 20
4.
SUB
CONTRAST
ADJUSTMENT
(2)
1) Set the following controls at the positions indicated.
Brightness control VR (R3009)......... Minimum
Sub Brightness control VR(R1107)......... Center
Colour control VR (R3002) .........., Minimum
Contrast control VR (R3011) .......... Maximum
Sub
Contrast
control
VR
(R1103)
.........
Centre
2) Receive an NTSC colour bar signal.
3} Remove the D11 connector. (D-PCB).
4) Connect an oscilloscope between and earth.
5)
Adjust
Sub
Contrast
control
VR
(R1103)
to
achieve
2.5V
+
0.2V
on
the
oscilloscope
as
shown
in
Fig.
21.
6)
Set
Power
switch
to
OFF
position
and
insert
the
D11
connector.
White
Fig. 21
5. VERTICAL LINEARITY ADJUSTMENT
1) Set the following controls and switches at the positions
indicated.
Input signal Selector SW. (S3003).......... VIDEO
TV-System Selector SW. (S8002).......... AUTO
Brightness control VR (R3009)......... Click Stop
Contrast control VR (R3011).......... Maximum
Vertical Linearity control VR (R442)....... Centre
2) Receive an PAL Phillips pattern signal.
3) Adjust the Vertical Linearity control VR (R442) until
the circle of the pattern is symmetrical from top to
bottom (real circle).
6. VERTICAL HEIGHT ADJUSTMENT
Note: At the 300 inch size.
1) Set the following controls and switches at the positions
indicated.
Input Signal Selector SW. (S3003) ........ VIDEO
TV-System Selector SW. (S8002).......... AUTO
G/EXT Sync Selector SW. (S2) ......... Ext. Sync.
Video V-Size control VR (R428) .........., Centre
NTSC Sub V-Size control VR (R432) ....... Centre
RGB V-Size control VR (R437). 2.0.0.0... Centre
Brightness control VR (R3009) ......... Click Stop
Contrast control VR (R3011) ........0.. Maximum
2) Male sek le)s)=
1. Receive a PAL Phillips pattern signal.
2. Adjust the Video V-Size control VR (R428) to
achieve
a
pattern
height
of
3261
mm.
3. Set the Input Signal Selector SW. (S38003) to VIDEO
and receive an NTSC monoscope pattern signal.
4. Adjust the NTSC Sub V-Size control VR (R432) to
achieve a pattern height of 3261 mm.
3) Stem foley
1. Set the Input Signal Selector SW. (S3003) to RGB.
2. Receive an RGB signal from an RGB signal generator.
3. Adjust the RGB V-Size control VR (R437) to achieve
a pattern height of 3261 mm.
7.HORIZONTAL WIDTH ADJUSTMENT
Note: At the 300 inch size.
1) Set the following controls and switches at the positions
indicated.
Input Signal Selector SW. (S3003) ........., VIDEO
TV-System Selector SW. (S8002).........., AUTO
G/EXT Sync Selector SW. (S2) ......... Ext. Sync.
Video
H-Size
control
VR
(R1541)
.0
2000...
Centre
RGB H-Size control VR (R1536).........., Centre
Brightness control VR (R3009) ......... Click Stop
Contrast control VR (R3011) ... 0.0002. Maximum
2) Rabelsen\fele) 5
1. Receive an PAL Phillips pattern signal.
2. Adjust the Video H-Size control VR (R1541) to
achieve a pattern width of 4348 mm.
a

PT-302
3) Bteiemitele)s
1. Set the Input signal selector SW. (S3003) to RGB.
2. Receive an RGB signal from an RGB signal generator.
3. Adjust the RGB H-Size control VR (R1536) to
achieve a pattern width of 4348 mm.
8. RASTER GEOMETRIC ADJUSTMENT
1) Set the following controls and switches at the positions
indicated.
Input Signal Selector SW. (S8003) ......... VIDEO
Brightness control VR (R3009)......... Click Stop
Contrast control VR (R3011) .......... Maximum
Red, Blue Static convergence controls
VR (R8001 ~ R8004)...........-20-.. Centre
Green Static convergence controls
VR (R7005, R7006).............-.-0-. Centre
Red, Blue Dynamic convergence controls VR (R871,
R873, 876, 878, 880, 882, 884, 885, 887, 890, 892,
R894, 896, 898, 900, 901, 904, 905, 909, 911, 913,
R915, 917, 919, 921, 923, 924, 926, 928, 930, 932,
R935, 937, 939,941,943, 7012, 7013)...... Centre
Red, Blue Top and Bottom Pincushion
compensation VRs (R870, R907).......... Centre
Green Top and Bottom Pincushion
Compensation VR (R788)............40. Centre
T/B incushion Waveform Adjustment
VRs (R955, R958, R70386).............. Centre
TV-System Selector SW. (S8002).......... AUTO
2) Receive an NTSC cross hatch pattern signal.
3) Connect an oscilloscope between figeggand earth.
4) Adjust R955, R958 and R7036 to achieve maximum
amplitude and confirm that both side of the bow tie
pattern are symmetrical (A, B in Fig. 22).
Amplitude—R955
Axis-R958 and R7036
Fig. 22
5) Disconnect oscilloscope from :
6) Connect an oscilloscope Ay: TPC2
(earth).
7) Adjust R787 and R791 to achieve the correct wave-
form as shown in Fig. 23.
a. Both sides of bow tie wave should be symmetrical.
b. Peak points should be at the same level.
Same level
Cc D
Symmetric
Fig. 23
8) Cover the Red and Biue lenses with lens covers.
9) Adjust Green Top and Bottom Pincushion Compensa-
tion VR (R788) to obtain straight horizontal Green lines
from top to bottom.
10) If adjusting R788 is insufficient, adjust R7036, R958
and R788 accordingly by the following procedures.
(Refer to Fig. 24-A, 24-B).
Line of
Centre
Straightened —p»
by R788
Straightened —»
by R958
Straightened —p»
by R788
Fig. 24-A
> =: <cpP
Line of by
Centre R7036
OVER
Vy
Straightened —»
by R788
Straightened —>>
by R958
Straightened —»
by R788
Fig. 24-B
— 14—

PT-302
11) Adjust R745 to get staright horizontal lines from top 4) Readjust the deflection yoke if any of the horizontal
to bottom as shown in Fig. 25. lines ate tilted.
5) Receive an RGB signal and turn on the TEST SW.
(S8001).
=> 6) Cover the Blue lens with the lens cover.
7) Adjust the convergence as follows.
8) The following controls are located on the convergence
control board.
Fig. 25.
9) Adjust each of the red convergence adjustment
controls in the order of the instructions @) to @) in
9. CONVERGENCE ADJUSTMENT the figure so that the red pattern matches the green
1) Demagetize the chassis and CRTs using a degaussing pattern.
coil.
10)
Remove
the
lens
cover
from
the
Blue
lens
and
cover
the Red lens.
=
2) Adjust all three deflection yokes to converge all
horizontal lines at the centre of the screen. Deflection 11) Adjust each of the blue convergence adjustment
yokes be inserted all the way towards the front side controls in the order of the instructions @6) to mM
of the CRT the figure so that the blue pattern matches the green
pattern.
3) Adjust each centring magnet to set the pattern centre ;
12) Return the red CRT to operation.
Function of Adjustment VR’S
to at the geometric centre of the screen.
Order of Adjustment VR’S
CONVERGENCE LIMITS :
(in mm from centre of
raster centre)
—17—

PT-302
10. GK DRIVE ADJUSTMENT
1) Set the following controls at the position indicated.
Brightness control VR (R3009) .......... Click ‘Stop
Colour control VR (R3002) ........... Minimum
Contrast control VR (R3011) ......0... Maximum
2) Remove the D11 connector {(D-PCB).
3) Receive an NTSC colour bar signal.
4) Connect the oscilloscope between BRIMEY and earth.
5) Adjust Brightness control VR (R3009) to control the
black level, less than B+ (205V) level.
6) Adjust G-Drive control VR (R1801) to achieve 130V +
3V as shown in Fig. 26.
130V + 3V
Fig. 26
7) Set Power switch to OFF position and insert the D11
connector.
11, CUT OFF ADJUSTMENT
1) Set the following controls at the positions indicated.
Colour control VR (R3002) ........... Minimum
Brightness control VR (R3009)......... Click Stop
Screen VR (FOCUS SCREEN VR)....... Minimum
2) Receive an NTSC colour bar signal.
3) Set Service switch (S10) to Service position.
4) Connect oscilloscope to @igMenh and earth.
5) Adjust Sub Contrast control VR (R353) such that
voltage meter reading is 182V + 2V at the horizontal
scanning period.
Scanning period
182V + 2V
Fig. 27
12. WHITE BALANCE ADJUSTMENT
Note: Do not adjust Focus screen VR (G) and G drive
VR (R1801).
1) Receive an white pattern signal.
2) Set service switch (S10) to the SERVICE position.
3) Set the Focus screen VR (R/B) to the minimum position.
4) Adjust Brightness control VR (R3009) so that the
picture tube (G) becomes faint light.
5) Set service switch (S10) to the NORMAL position and
adjust high light, white balance with R drive VR
(R1701) and B drive VR (R1901) controls.
13. SUB BRIGHTNESS ADJUSTMENT AND ABL
CONFIRMATION
1) Set the following controls at the positions indicated.
Brightness contro! VR (R3009) ......... Click Stop
Contrast control VR (R3011) .......... Minimum
Sub Brightness control VR (R1107)...... Minimum
2) Connect a digital voltmeter between FEGIN (+) and
Gra -).
3) Receive a monoscope pattern signal.
4) Adjust the Sub Brightness control
achieve 500 mV + 15 mV.
5) Set Brightness VR (R3009) and Contrast VR (R3011)
controls to maximum then confirm that 1.5V + 0.1V is
present between fggegl and TPD2)
VR (R1107) to
14, PAL APC ADJUSTMENT
1) Set the following controls at the position indicated.
Colour control VR (R3002) ........... Maximum
R651 (SECAM DL Adj.)........... 00006 Centre
2) Receive an PAL colour bar signal and set the .|nput signal
selector SW. (S3003) to the PAL position.
3) Connect an oscilloscope between |TPA10 Fag chassis
GND.
4) Adjust PAL APC ADJ. (R619) to achieve waveform
shown in Fig. 28.
Adjust this
level to zero
Fig. 28
15.PAL DELAY LINE ADJUSTMENT
1) Set the following control at the position indicated.
Colour control VR (R3002) ........... Maximum
2) Receive an PAL colour bar signal and set the Input signal
selector SW. (S3003) to the PAL position.
3) Connect an oscilloscope between Gray and chassis
GND.
— 18 —

4) Adjust Delay Line Adj. VR (R633) and Delay Line
Matching Trans. (L617) to achieve waveform shown in
Fig. 29.
Minimize the differences
(by L617)
Adjust this level to
zero (by R633)
Fig. 29
16. PAL COLOUR OUTPUT ADJUSTMENT
1) Set the following control at the position indicated.
Colour control VR (R3002) ........... Maximum
2) Receive an PAL colour bar signal and set the Input signal
selector SW. (S3003) to the PAL position.
3) Connect an oscilloscope between | TPA12 faa chassis
GND. When adjust Sub colour VR (R629) to achive
1.8V + 0.1Vp-p on the oscilloscope as shown in Fig. 30
4) Connect an oscilloscope between | TPA10 Fame chassis
GND. When confirm that the waveform level is 2.2V +
0.5Vp-p on the oscilloscope as shown in Fig. 30.
sae, (1.8V + 0.1Vp-p)
Bawls)
(2.2V
+
0.5Vp-p)
Fig. 30
17. NTSC APC ADJUSTMENT
Note: Before making this adjustment, PAL APC adjust-
ment must be completed.
1) Set the following control at the position indicated.
Colour control VR (R3002) ........... Maximum
Tint VR (R3006) .............. Fully clockwise
2) Receive an PAL colour bar signal and set the Input
signal selector SW. (S3003) to the PAL position.
3) Connect an electronic voltmeter to figgjend memorize
indication of the electronic voltmeter.
4) Change signal PAL colour bar pattern into NTSC
rainbow colour bar pattern and Input signal selector
SW. (S3003) to the NTSC position.
5) Adjust C613 to obtain the value specified in item 4)
within a tolerance + 0.1V.
PT-302
18. 3.58 NTSC COLOUR OUTPUT
1) Set the following contro! at the position indicated.
Colour control (R3002).............. Maximum
2) Receive an NTSC rainbow colour bar signal and set
the input signal selector SW. (S3003) to the NTSC
position.
3) Connect an oscilloscope between (B-Output)
and chassis GND. When confirm that the waveform
level is 0.7V + 0.2Vo-p on the oscilloscope.
4) Disconnect oscilloscope from Bul7Wha (B-Output) and
connect oscilloscope to a or
When confirm that the waveform level is O.6V + 0.2Vo-p
on the oscilloscope.
5) Disconnect oscilloscope from BUGZWI (R-Output) and
connect oscilloscope to ae oe
6) Turn Tint control (R3006) and confirm that the variable
range is more than 60°.
Fig. 31
19. M-NTSC COLOUR OUTPUT
Note: Before making this adjustment, PAL APC adjust-
ment must be completed.
1) Set the following control at the position indicated .
Colour control (R3002).............. Ma ximum
2) Receive an M-NTSC rainbow colour bar signal and set
the Input signal selector SW. (S3003) to the W-NTSC
position.
3) Connect an oscilloscope between Buea (B-Output)
and chassis GND. When confirm that the waveform
level is O.6V + 0.2Vo-p on the oscilloscope as sown in
Fig. 32.
4) Disconnect oscilloscope from (B-Output) and
connect oscilloscope to (R-Output).
When confirm that the waveform level is 0.5V £0.2Vo-p
on the oscilloscope as shown in Fig. 32.
5) Disconnect oscilloscope from MIGgWi (R-Output) and
connect oscilloscope tp SUGe-Wya (B-Output).
6) Turn Tint control (R3006) and confirm that thevariable
range is more than 60° as shown in Fig. 32.
— 19 —

PT-302
-Same height
(Tint VR R3006)
sewed (0.6V + 0.2Vo-p)
aie wie) (0.5V + 0.2Vo-p)
@® @
Fig. 32
20. SECAM DELAY LINE ADJUSTMENT
1) Set the following control at the position indicated.
Colour control (R3002).............. Maximum
Adjust R-Y Gain (R646) and B-Y Gain (R659) controls
shown in Fig. 33.
°
a MS
Center Center
R646 R659
Fig. 33
2) Receive an SECAM colour bar signal and set the Input
signal selector SW. (S3003) to the SECAM position.
3) Connect an oscilloscope between (B-Output)
and chassis GND.
4) Adjust Delay Line Adj. (R651) and Delay Line Match-
ing Trans. (L619) to achieve waveform shown in Fig. 34.
Minimize the differences
{by R651)
Minimize the difference
(by L619)
Fig. 34
21.BELL FILTER/LINE DISCRIMINATOR
1) Set the following contro! at the position indicated.
Colour control (R3002).............. Maximum
2) Receive an SECAM colour bar signal and set the Input
signal selector SW. (S3003) to the SECAM position.
3) Connect an oscilloscope between BWP (B-Output)
and chassis GND.
4) Adjust L615 to achieve waveform shown in Fig. 35.
ee by L615
Fig. 35
22. SECAM COLOUR OUTPUT ADJUSTMENT
1) Set the following control at the position indicated.
Colour control (R3002).............. Maximum
2) Receive an SECAM colour bar signal.
3) Adjust R-Y Gain (R646) and B-Y (R659) controls
shown in Fig. 36.
Fig. 36
4) Connect an oscilloscope between Ey Weae (B-Output)
and chassis GND.
5) Adjust R659 and L619 to achieve waveform shown in
Fig. 37,
Adjust this difference
to zero (by L619)
1.7Vp-p + 0.1V
(by R659)
Fig. 37
6) Disconnect oscilloscope between [aa Wewe (B-Output)
and connect oscilloscope to #agg-Wtem (R-Output).
7) Adjust R646 and L611 to achieve waveform shown in
Fig. 38.
Adjust this difference
to zero (by L611)
1.9Vp-p + 0.1V
(by R646)
Fig. 38
— 20 —

INSTALLATION /ADJUSTMENT PROCEDURE
The PT-302 is preset for a 5080 mm (200 inch) screen-FRONT CEILING mode.
Procedure
Installation
Preparation for Adjustment
ens Focus Adjustment
Varification of Image Position
Deflection Adjustment
reen Raster Adjustment
7
| 4 |
| 2 |
Ey
Ee
| 8 |
ea
eae
ES
| 9 |
tatic Convergence Adjustment
hading Correction
0 R.G.B Mode Adjustment
Dynamic Convergence Adjustment
eg
| installation Cd
| Preparation for Adjustment
[| Deflection Adjustment
| Dynamic Convergence Adjustment |
| RGBMode Adjustment
YES
YES
YES
+|3la
m (o)
Rear with
mirror
Rear with
mirror
@lf necessary
[Table 2] Projection Mode and Installation/Adjustment Procedure.
H Variations on Standard Installation
There are two fundamental installation methods: floor placement and ceiling mount, and it is easy to change to the desired
method. The method should be selected according to the location of the installation and other circumstances, such as using
a mirror for indirect projection in cramped locations, or projection from behind the screen, etc.
(1) Front Ceiling Type
2777” Video
Projector
Application:
This type of installation is appropriate for a large area where the in-
Stallation will be secured in place and many people will be viewing the
screen. Because the projector is ceiling-mounted, it won't interfere
with floor fevel activities. (Examples: halls, classrooms, etc.)
(4) Rear Floor Type with mirror
Application:
This type of installation is appropriate for a conference, meetings, etc.
in a small area.
1. Installation
(2) Front Floor Type
Application:
This type of installation is appropriate if the unit is not to be secured in
place, so that it can be moved as needed. (Examples: conferences,
meetings, product introductions, etc.)
(5) Rear Ceiling Type
Application:
This type of installation is appropriate for a clear screen image in a
bright environment.
1-1. Front Ceiling, Front Floor, Rear Ceiling and Rear Floor.
Ceiling Type (Front or Rear)
130 mm
(5 3/32 inch)
Screen
Screen Center
Floor Type (Front or Rear)
{3) Rear Ceiling Type with mirror
This type of installation is appropriate if the area is small or cramped.
(Examples: show windows, store front displays, etc.)
(6) Rear Floor Type
Application:
This type of installation is appropriate for a clear screen image in a
bright environment.
Screen Center
(16%2 inch)
= 24
A=A-84 mm
(/teinch)
[Table 3] Retationship between picture size and mounting distance.
eet Teter l
@ 9 ™
[er [el ae [ae RE]
(300) (240) (180) (343%1e)_ | (91%18) | (B477%s0) | (473/52) (616)
poe
(250) (200) (150) (2884) (785/16) (291 ""/0) (131/32) (4)
oo | eo _| tem _| asm | esta | az
(170) (136) (102) (200/16) (87¥32) (2007/4)
am roma | orria | cova [Frente] reente] tor
(150) (95/48) (71°32) (178°%F52) | (5125/32) (1781/4)
Note: Measurment in mm and (inch)
>
For conventional flat screen
(Aspect ratio 3 x 4)
X: Picture width
Y: Picture height
Z: Diagonal Picture size
A: Distance from screen to center of hole of the front holding bolt.
B: Distance from mounting plate bottom to center of screen.
C: Distance from screen center to lens surface.
1-2. Rear Ceiling or Rear Floor with Mirror
Ceiling Type Floor Type
Translucent Screen
X+Y =C
C = Distance from screen center to lens surface.
(Throw Distance)
F=X-Sinlat+8 )
D=Y:Sina +F
1-3. Projector Positioning
ane
4 O Parallel
———
Centerd
Check to be sure that the screen
is installed at a 90° angle relative
to the ceiling and floor. (as illus-
trated, a weight plumb line would
be helpful for verifying the
screen's vertical positioning.)
Refer to Table 3 for projector
positioning.
Note:
Projector must be centered on
screen.
(“A” and “B” dimensions above
should be equal.)
Projector should be paafiel to
the screen surface (“C” ind “D”
dimensions above shald be
equal).

1-4. Installation Kit (Ceiling Mount)
PT-302 PT-302
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2. Examples of installation in typical wood frame structures
(1) For installation in single-story structure or on the uppermost floor.
Sectional View
+130
mm
(5
3/32
inch)
:
[Side
View]
|
Holding
Bolts
Nuts Min. 51 x 152 mm (2 x 6 inch) Ceiling Joist
—— Min, 51 x 102 mm (2 x 4 inch) Cross Member
ZEEE —— Ceili
M10-Nut XNG10B ame 7a OO an eiling
®
XWH10
(19/32
~
25/32
inch)
uts.
=|>-— Spring Washers——>|=
Holding Plate
Washers
= meet hh =
(2) For installation in ceiling other than on the uppermost floor.
Sectional View my 30 mm (5 3/32 inch) +
[ Side View] PILLIL LLL Floor
i7Min, 51 x 152 mm (2 x 6 inch) Floor Joist
Min. 51 x 102 mm (2 x 4 inch) Cross Member
‘
Mereeeeree
Ceiling
Hpiding Bots (19/32 ~ 25/32 inch)
< Nuts
1-5. Holding Plate Installation Example for 5080 mm (200 inch) Picture Size
1.
Boson
of
Hetaing
Plate
[Side
View]
Holding
:
(1) Decide the distance (A)’ between the front @—— Balt Position = | Holding Plate
holding bolts and the wall which will hold
the screen.
MW
[ceiling | Ee
Holding Bolt
=—>-—~- Washers
= me j Nuts
@®’ = 5930 mm (233 15/32 inch)+ t mm. $8] Ht ia Epa
, = » x 3. Main Unit Installation
(t: distance between wall and front surface ExX@ £
Eo ‘S| Note: Make sure that the Holding Plate is installed : ;
of screen.) Bin £ re absolutely horizontal. ti oe (1) Raise the PT-302 and hook latch to the Pivot (@) on the Holding Plate.
‘ Coq ; Center of screen i it wit
(2) Calculate the distance @ barwaanaihe ~2 aan Zz Fereen (2) Set the tilt angle and secure the unit with screw©).
mm =
ceiling and the Holding Plate. (200 inch) ©
= ceiling height - G@ — ® 1652 mm
(65 1/32 inch).
Screen
Floor
i
(3) Be careful when positioning the 4 bolts. The holding bolts should be parallel to the screen. Also, the center of the
screen should match the center of the holding plate as shown in the figure below.
[Top View]
Parailel
Center
314 mm (12 3/8 inch)
oe Holding Plate
130 mm (5 3/32 inch)
2. Preparation For Adjustment
If the signal input to the Projector is a VIDEO signal, set
the signal selector switch to VIDEO; if they are LINE
signals, set the switch to LINE; and if they are RGB signals,
Power Switch
Input Selector
t j :
set
the
switch
to
RGB
Switch
® if the REMOTE CONTROLLER is connected, use it
to set the signal selector switch (RGB/VIDEO/LINE),
and to adjust the Colour, the Tint, the Brightness, the
Contrast and the Sharpness.
Blue Selector Switch
TV System Selector Switch
Test Selector Switch
Static Convergence Control
Main Power
Switch
ec —)