Sharp XV-310P User manual

1 xv-31OP
st-iARi= SERWCE MANUAlm
SERVICE-ANLEITUNG
S92J3XV31 OPII
SECAMIPAUNTSC SYSTEM
LCD PROJECTOR
LCD PROJEKTOR
In the interrests of user-safety (Required by safety regulations in some countries) the set should be
restored to its original condition and only parts identical to those specified should be used
I
Im lnteresse der Benutzer-Sicherheit (in emigen Lander durch Sicherheitzvorschriften gefordert)
sollte dieses Gerat wieder auf seinen ursprijnglichen Zustand eingestellt und nur die
vorgeschriebenen Teile verwendet werden.
CONTENTS
INHALT
Page
.
SPECIFICATIONS .........................
2
.
NOTE TO SERVICE PERSONNEL
............
3
0 LOCATION OF CONTROLS
................
4
0 REMOVAL OF MAJOR PARTS
............
12
0 ELECTRICAL ADJUSTMENT ..............
16
.TROUBLESHOOTINGTABLE ;
............ 21
. CHASSIS LAYOUT ......................
49
. DESCRIPTION OF SCHEMATIC DIAGRAMS .
51
l WA VE FORMS
..........................
52
l SCHEMATIC DIAGRAM
..................
53
. PRINTED WIRING BOARD ASSEMBLIES ....
65
l BLOCKDIAGRAM
......................
75
l PARTS LIST
0 ELECTRICALPARTS ...................
81
q CABINET AND MECHANICAL PARTS
... 100
0 PACKING PARTS
....................
103
UACCESSORIES PARTS
................
103
l PACKING OF THE SET
..................
104
Seite
l TECHNISCHE DATEN . . . . . . . . . . . . . . . . . . . . . 2
l HINWEISE FUR DEN WARTUNGSTEHNIKER 26
0 BEDIENELEMENTE . . . . . . . . . . . . . . . . . . . . . . 27
l AUSBAU DER HAUPTTEILE . . . . . . . . . . . . . . 35
l EINSTELLUNG DER
ELEKTRISCHEN BAUTEILE . . . . . . . . . . . . . 39
. FEHLERSUCHTABELLEN . . . . . . . . . . . . . . . . . 44
. CHASSISANORDNUNGSPLAN . . . . . . . . . . . . 49
l BESCHREIBUNG DES
SCHEMATISCHEN SCHALTPLANS . . . . . . . 51
. WELLENFORMEN . . . . . . . . . . . . . . _. . . . . . .
52
l SCHEMATISCHER SCHALTPLAN _ _ . . . . . . . . 53
. LEITERPLATTENEINHEITEN _. . . . _. . _. . . . . 65
0 BLOCKSCHALTPLAN . . . . . . . . . . . . . . . . . . . . 75
0 TEILELISTE
0 ELEKTRISCHE TEILE . . . . . . . . . . . . . . . . . . . 81
cl GEHAUSE UND MECHANISCHE BAUTEILE lb0
q VERPACKUNGSTEILE . . . . . . . . . . . . . . . . 103
q ZUBEHOR . . . . . . . . . . . . . . . . . . . . . . . . . . 103
. VERPACKEN DES GERATS . . . . . . . . . . . . . . 104
SHARP CORPORATION

xv-31 OP
SPECIFICATIONS
System :
Projection image size (diagonal):
LCD panels:
No. of pixels:
Lens:
Contrast ratio:
Horizontal resolution:
Operating temperature:
Storage temperature:
Power Source:
Audio output:
Speaker:
Power consumption:
Dimensions (W x H x D):
Weight:
Accessories:
PAUSECAMlNTSC3.58INTSC4.43 SYSTEM
76 cm (30 inch) at a distance of approx. 1 m
152 cm (60 inch) at a distance of approx. 2 m
9.1 cm (3.6”) Twin-TFT Active Matrix panel
RGB Trio 100,386 pixels (234(V) x429(H))
F2.8 f=123mm
1OO:l
PAL:More than 320 lines, NTSC: More than 350 lines
5°C - 40°C
- 20°C - 55°C
AC 220 - 24OV, 50/60Hz
3W (Monoural)
8 cm (Round Speaker)
175w
215mmx149mmx385mm
4.3 kg (9.51 Ibs)
LensCover: 1 pc.
Air Filter: 1 pc. (installed)
21-pin RCA conversion adapter: 1 pc.(ln some ares, this adapter is
not supplied with the unit.)
System :
ProjektionsbildgroBe (diagonal):
LCD-Projektionsplatten:
Anzahl der Punkte:
Objectiv:
Kontrastverhaltnis:
Horizontale Auflosungf
Betriebstemperatur:
Laget-temperatur:
Stromversorgung:
Tonausgangsleistung:
Lautsprecher:
Nennaufnahme:
Abmessungen (B x H x T):
Gewicht:
Zubehor:
I
Specifications are subject to change without notice.
I
TECHNISCHE DATEN
PAUSECAM/NTSC3.58/NTSC4.43-System
76 cm (3OZolI) bei einem Abstand von ca. 1 m
152 cm (60 Zoll) bei einem Abstand von ca. 2 m
9,l cm (3,6Zoll) Twin-TFT Aktivmatrixplatten
RGB-torio 100.386 Bilpunkut (234(V) x429(H))
F2,8f = 123 mm
1OO:l
PAL: Mehr aks 320 Zeilen, NTSC: mehr als 350 Zeilen
5°C - 40°C
- 20°C - 55°C
Wechselstrom 220 - 24OV, 50/60Hz
3W (monoural)
8 cm (Rundlautsprecher)
175w
215mmx149mmx385mm
4,3 kg
Objektivkappel St&k
Luftfilter: 1 Stuck (installiert)
21-pol. RCA-Konvrsionadaptor: 1 Stijck
(In einigen Gebieten wird der Rca-Konversinadapter nicht mit der
Get-at mitgeliefert.)
I
Anderrungen der technische Daten vorbehalten.
I

1 xv-31OP
NOTE TO SERVICE PERSONNEL
UV-RADIATION PRECAUTION
The light source, metal halide lamp, in the LCD projector emits small
amounts of UV-Radiation.
AVOID DIRECT EYE AND SKIN EXPOSURE.
To ensure safety please adhere to the following:
1. Be sure to wear sun-glasses when servicing the
projector with the lamp turned “on” and the top
enclosure removed.
2. Do not operate the lamp outside of, the lamp
housing.
3. Do not operate for more than 2 hours with the
enclosure removed.
UV-Radiation and Medium Pressure Lamp Precautions
1. Be sure to disconnect the AC plug when replacing the lamp.
2. Allow one hour for the unit to cool down before servicing.
3. Replace only with same type lamp. Type MSFRl20S12H rated 8OV/12OW.
4. The lamp emits small amounts of UV-Radiation, avoid direct-eye contact.
5. The medium pressure lamp involves a risk of explosion. Be sure to follow installation instructions
described below and handle the lamp with care.
H Lamp Replacement
Note:
Since the lamp reaches a very high temperature during
units operation replacement of the lamp should be
done at least one hour after the power has been
turned off. (to allow the lamp to cool off.)
Installing the new lamp, make sure not to touch the
lamp (bulb) replace the lamp by holding its reflector
8.
[Use original replacement only.]
@ Reflector
DANGER! -
Never turn the power on without the lamp to avoid electric-shock or
damage of the devices since the stabilizer generates high voltages at its start.
,
3

About the Temperature
Monitor Function:
l If the projector starts to overheat due to
ON SCREEN DISPLAY
set-up problems or a dirty filter, “TEMP”
TEMP.
will flash in the upper-left portion of the
picture. If the temperature continues to
rise, then the Temperature Monitor Indi-
cator will turn on and the power will shut
El
off, refer to “Warning lamps”, when the warning appearsin the
picture.
aThe Cooling Fan regulates the internal temperature and its per-
formance is automatically controlled. The sound of the fan may
change during operation due to changes in the fan speed.
Cooling fan (air inlet)
SYSTEM
SYSTEM mode button
---I--@
S-VIDEO INPUT
VIDEO INPUT-1
AUDIO INPUT-1
OC12V OUTPUT
DC 12V OUTPUT
Carrying handle
Speaker
1
1
Place a finger under the
“A” portion and lift.
/
-VIDEO INPUT-2
L
TRIPOD SCREW MOUNT (Bottom)
INPUT-2
Tripod
Choose a tripod that is sturdy enough
to svpport the full weight of the set
(20 kg [44 Ibsj).
l Do not use a small tripod, since it will
not be able to reliably support the
st?t.
_. .
-.
l Inquiries should be directed to your
local Sharp dealer or Sharp Service
Station.
r
Temperature warning indicator
Lamp replacement indicator
Power indicator
LAMP/POWER (ON/OFF) button
d
-VOLUME control button
-b’
!
A/V
REVERSE
AV SELECT button
REVERSE button
BLUE SCREEN OFF/ON switch
M
D
+
-
E
MEMORY button
PICTURE mode button
PICTURE control button
MAIN POWER switch

I
should be within this range.
Do not place the projector in excessively humid or dusty locations or in location exposed to soot
or cigarette smoke. If the lens, mirror or other optical component become dirty, the picture will blur
or darken, making viewing difficult.
l Do not expose the projector to extreme heat or cold.
Screen size Distance
from lens
Operating temperature: 5”C-40°C
(diagonal) Projection
distance L
center to lower edge
Storage temperature: -2O”G55°C
of screen (Ii)
152 cm (60 Inch) 2.0 m
25 cm
101 cm (40 inch) 1.4m 16cm
Example of a standard setup
1 76cm(30l”ch) 1 l.Om
12cm
mPosition the screen so that it is not in direct sunlight or room light. Light falling directly onto the
screen turns the screen white and makes viewing difficult. Close the curtains when using the
screen in a bright room.
N Place the projector at a 90” angle to the screen to achieve optimum viewing quality.
If tha screen and projector are not properly positioned
with respect to one another, the picture may become
distorted and difficult to view.
J
1
152cm
(60 inch)
Lens center
Lower edge of screen (white portion)
Projection distance L
n After positioning the projector, adjust the focus as shown.
Focusing
n Focus the lens so that the screen
image is as sharp as possible.

n Use the adjuster at the bottom of the projector to adjust the height of the projector.
When the height of the projector is adjusted with the
adjuster. the image on the acreen will look distorted
since the projector is not at right angles to the screen.
Raising *
Lowering 4
n Use the carrying handle when moving the projector.
m
Carrying handle
I
When moving the projector. replace the lens cap to
protect the lens.
Lift up the carrying handle
Press the “&,” portion
and lift up.
Press down on the
“&,” portion to stor
To connect the projector to video equipment for viewing played-back
images.
am3
l When connecting the vidao equipment, pteasa be sure that the power is off This
will protect both the projector and the equipment being connected.
*Refer to the instruction manuals of other equipment being connected to the
projector for proper connection.
When
Connecting
lo S-video
oulpul jack
Video equipment
,,_ ,. _.
_? . .
Use the AN SELECT button to select
either VIDEO 1 or-VIDEO 2.
r---g pTy7+
S-Video Terminal Priority Input Function
‘Ihe Video Input 1 and S-video input termin& on this projector am set up
to give priority to input from the S-video lerminsl.
*When video equipment is wnnected lo both terminals, the video image
from the S-video input terminal is shown on the screen.
*To view video Input from video equipment connected to the Video Input
1 terminal. disconnect tha plug from the S-video terminal.

To connect the projector to video and audio equipment for viewing
n When the BLUE SCREEN function is turned ON, the screen will turn blue when there is no video signal
played-back images. (With an audio amplifier connection.) input to the projector.
H Press the BLUE SCREEN button once more to turn the BLUE SCREEN function OFF.
m When connecting equipment with an S-video output, such as an S-VHS VCR.
and one or more video decks to an AV amplifier, connect up both the S-VIDEO
terminal and the VIDEO-P JACK on the projector.
n Use the the VIDEO SELECT button to select either S-VIDEO INPUT to watch
played-back images from equipment connected to the S-VIDEO terminal. or
VIDEO INPUT 2 to watch played-back images from equipment connected to the
VIDEO-2 terminal.
A/V
‘0
RRfERSE
0-
N/O
o-
When
connecting
to S-video
output jack
To S-video
otipui jack
!
To video
otipul jack
fl=+2
To audio output jacks m c
u
1
Video equipment
lSpeakerl
1
Blue screen function
-When the Blue Screen button is set to wo (ON/
OFF), the following display is shown for a few
seconds on your screen.
(oNI
l When the BLUE SCREEN button is set to the so (ON)
position, the screen turns blue when no signal
or noise is input. (If the Blue Screen function is
engaged for wer 15 minutes, the AUTO OFF func-
tion engages and power is automatically turned off.
Five minutes before the power turns off. the remain-
ing time (in minutes) is displayed at one-minute
intervals in the top left of the screen.)
r
2
REVERSE ON/OFF button
1
Blue screen button
2
Reversing the image
*When the REVERSE ON/OFF button is set to
REVERSE mode, the following display is shown for
a few seconds on your screen.
1
c3fl
ION)
*When a mirror or reverse image is required for an
application such as rear projection, the REVERSE
image switch can be used.
Press the reverse image button. The image on the
screen will Rip to a mirror image of the input video
signal. Press the button again and the image will
return to its normal appearance.

00
3
SYSTEM mode button
1
Turning on the main power switch
Set the Main Power switch
to ON.
L-iJJ
When you are using the projector for the first time or
when the power indicator lamp is off. set the main
power switch to ON. (Indicator lights red.)
The power indicator lamp turns off when the main
power switch is set to OH.
Main Power swPCh is set to OFF
Indicator lights red:
Standby StatUS
lndicstor lights green:
Projector lamp on
f
2
Turning on the lamp power
Press LAMP/POWER (ON/OFF) button
13
System change
Press SYSTEM mode button.
*When the button is pressed. the seleci COLOR system
is displayed in the top right corner of the screen for
about a few seconds.
*In Auto mode, ‘“PAL”. “SECAM”.“NTSC4.43”or
“NTSC3.58” is displayed on the screen for about
a few seconds when modes are automatically
chanqed.
4
NV Select
Press the AN SELECT button.
a&V button on the projector Opwatm panel
The indication is cycled as shown below when the
button is pressed.
VIDEO 1 ---+ VIDEO 2
The screen display changes as shown in
these
figures
. Even when the power is turned ofi using the POWER button. the COOLING FAN will continue to operate as long as the projector’s
internal temperature remains high (about 90 seconds). Do not disconnect the AC power cord plug while the COOLING FAN is
*This projector is equipped with three video input systems: S-video. Video-l, and Video-Z.
operating. *TO
choose between these system% press the AN button to select input from either the VIDEO-l (S-VIDEO given priority) or
elf the projector is turned on immediately after it has been turned off, it may take a short while before the lamp is turned on. (During the
VIDEO-2 terminals.
this period the Lamp Monitor indicator flashes green.)

n This projector’spicture is set to standard specifications at the factory. However, you can adjust it to suit
your own preferences using the VIDEO ADJUST buttons.
fl The positions of the picture settings are committed to memory when set.
=I
Adjusting the Volume
Press the Volume control button.
-1
Volume control button
2
9
Selecting the MEMORY
Press the MEMORY button.
M
0
*When the MEMORY button is pressed, the present
settings will be displayed on the screen for about
a few seconds.
2
MEMORY button
3
PICTURE mode
+
3
PICTURE control
-
3
Picture adjustments
Use the PICTURE MODE and
PICTURE CONTROL buttons
Cl
to set the picture to suite
0
your preferences.
+
-
6
The picture modes change as shown below when the
Picture mode button is pressed.
(Ml shows a mamofy number.)
.Select the mode that is to be adjusted and use the
PICTURE control buttons to make the adjustments.
*The modes are displayed on the screen for about
a few seconds. The adjustments have to be made
while the screen is displayed.
Tint setting can only be adjusted when receiving
NTSC signal.

n The air filter should be cleaned about every 100 hours. Clean the filter more often when the projector is
used in a dusty location.
l Have your dealer replace the filter when it is no longer possible to clean it.
I
Cooling fan
(filter)
I
MAIN
POWER
switch

=The projector’s lamp has a limited operating life.
When the lamp is nearly burned out, the picture and colour quality deteriorate. In this event, have the
lamp replaced by qualified service personnel.
Replacing the projector lamp requires special technical expertise and should be performed by your local
Sharp dealer or Sharp Service Station.
/
Hihis projector is equipped with warning indicators that go on when an abnormal condition occurs.
HThere are two warning indicators in the projector: the temperature warning lamp and lamp replacement
indicator.
n lf the projector malfunctions, the temperature warning lamp or the lamp replacement indicator will light
red and the power is turned off. Perform the following procedures when you have turned off the main
power switch.
Warning lamp Symptom Potential problems
*The air vents are blocked.
Countermeasures
l Install the projector in an
aoorooriate location.
l Clean the filter.
Temperature
The temperature
inside IS loo high.
*The air filter is clogged.
*The cooling fan Is
defective.
-Any of the internal circuits
are defective.
*Turn in the projector for
service.
Projector lamp
The projector lamp
does not light.
l The projector lamp has
reached the end of its life.
*The projector lamp circuit
is defective.
*Turn in the projector for
service.
If the temperature warnrng lamp lights up red and the power cuts off, the projector will enter stand-by mode.
Afler turning off the projector. be sure to wait until the unit’s internal temperature has sufficiently lowered before turning it on again
(at least 5 min.).
No picture
*The projector is not plugged into the mains supply.
*The MAIN POWER switch is set to off.
*The BRIGHT (-) control is set to the minimum position.
Colour is poor or faded *Check that the COLOUR (+) and (-1 controls are
properly adjusted.
Picture is blurred l Adjust the focus
*The projection distance is too long or short to allow for
proper focus.
An unusual sound is occasionally
heard from cabinet
l If picture is normal, the sound is due to cabinet shrinkage
caused by temperature changes. This will not effect
operation.
Maintenance indicator lights up
l Refer to “Warning lamps’:
No sound *Check
if the volume control is turned all the way down
*Check to make sure that the wires at the back of the LCD
projector are properly connected

xv-31OP 1
REMOVING THE MAJOR PARTS
1. Removing the rear panel
l-l. Unscrew the six screws off the rear panel and take out the rear panel.
1-2. Unscrew the two screws off the bottom of the unit.
Precautions on Handling the Cabinet
when removing and attaching the top cabinet, take the following precautions. The cable that connects
the speakers on the inside of the top cabinet with the main PWB is short. Do not pull up the top cabinet
too far, because otherwise the cable connector may be damaged. Slowly lift the top cabinet a -little,
disconnect the speaker cable from the “SP” connector on the main PWB, and take out the top cabinet
completely. To place the top cabinet back in position, first reconnect the speaker cable to the “SP”
connector on the main PWB, and then fit the top cabinet to the bottom cabinet. In this fitting, keep the
flexible cable, which runs between the LCD panel and the main PWB, inside the top cabinet. This cable
might be caught between the top and bottom cabinets.
cl
1
12

j xv-31OP
2. Removing the PWB
Disconnect the LCD panel connector and the bimetal PWB connector.
3.
Removing the lamp ballast and power PWB unit
3-1. Untwist the lamp guide catch and take out the light shielding plate.
3-2. Untwist the lamp guide bracket catch and detach the bracket.
3-3. Unscrew the screw to disconnect the grounding lug terminal.
Now take out the lamp ballast and the
power unit.
LCD panel tonne
cl
3
limetal PWB connector
13

xv-31OP
4. Removing the lamp unit
4-l. Unscrew the screw to detach the bottom cover.
4-2. Unscrew the two screws off the lamp unit. Take the lamp unit out.
5. Removing the optical unit
Unscrew the four screws off the optical unit and take the optical unit out.
cl
4
0
5
14

xv-31OP
6. Removing the fan
6-l. Unscrew the two screws to take out the front cover of the unit.
6-2. Keep the fort claws pressed and release the duct holder. Then unscrew the screw to take out the
fan unit.
7. Disassembling and reassembling the optical unit
7-1. Pull up the optical unit top cover.
7-2:Turn the projection lens clockwise and remove the lens.
7-3. Pull up the following optical unit parts: Fresnel lens, light-in deflection plate, LCD panel, light-out
deflection plate, condenser lens and U/V cut filter.
Press the duct holder
claws to remove the holder.
t----e I
Bottom cabinet
Optical unittopcover
Optical unit bottom cover
15

xv-3lOP j
ELECTRICAL ADJUSTMENT
Note: Unless othenkise specified, all the adjustment& should be made in the standard
conditions.
Adjustment position Adjustment condition Adjustment method
1
AGC (Automatic 0 Receive the ,NTSC monoscope
Adjust RI 546 so that the voltmeter
Gain Control):
pattern signal. should read 3.0
f 0.05V.
RI 546
l Connect the voltmeter between
TPI 501 and GND.
2 5 Y level: R861
0Receive the NTSC colour bar signal.
Adjust R861 so that the difference
0 Apply 5 V to TP1604 to turn off the between the sync level and the
gamma correction.
100% white level be’5.8 f 0.1 Vp-p.
8 Connect the oscilloscope between
TP1602 and GND.
100% white level
------_---
0 Turn on the gamma correction.
If the signal is out of sync or the
white portion is degraded, turn
T
RI 604 to restore the original state.
5.8 Vp-p
ul - ---
Sync level
3
Sub-brightness:
0 Receive the NTSC monoscope Keep TP1604 under 5
V load and
R2139 pattern signal.
then under no load.
0 Connect the oscilloscope between
Repeat this several times. Adjust
TPI 602 (G output) and GND.
R2139 so that the DC level at the
l Apply 5 V to TP2001 via a 6.8-kohm front porch be unchanged
resistor. whether TP1604 is under load or
not.
Front porch’s DC level
to be unchanged
,’
-I)
4
Sub-bias:Rl604 l Receive the NTSC colour bar signal.
Turn RI 604 so that the peak of the
(Green),
l Connect the oscilloscope between
sync signal be at -5.5 + 0.5 V.
TP1602 and GND.
‘I
5
Sub-bias:R1602
l Receive the NTSC colour bar signal.
‘Turn RI602 so that the DC level at
(Red)
l Connect the oscilloscope between
TP1601 be the same as that at
TPI 601 and GND.
TPI 602.
DC level at TPI 602 + 0. I V
16

I
xv-3lOP
Adjustment position Adjustment condition Adjustment method
6
Sub-bias: RI 608
l Receive the NTSC colour bar signal.
Turn RI608 so that the DC level at
(Blue)
l Connect the oscilloscope between
TP1603 be the same as that at
TP1603 and GND.
TPI 602.
DC level at TPI 602 5 0.1 V
7
White balance:
l Receive the NTSC monoscope Observe the
CHI and CH2
RI 629 (B output)
pattern signal. waveforms in the ADD mode.
l Connect the oscilloscope’s CHI to
Adjust RI629 so that the
TPI 602. amplitude be minimum.
l Connect the oscilloscope’s CH2 to
TP1603 (B output) and invert the
waveform.
8
White balance:
l Receive the NTSC monoscope Observe the
CHI and CH2
RI 623 (R output)
pattern signal. waveforms in the ADD mode.
l Connect the oscilloscope’s CHI to
Adjust RI623 so that the
TPI 602. amplitude be minimum.
l Connect the oscilloscope’s CH2 to
TPl601 (R output) and invert the
AL colour bar signal.
Turn T402 so that the chroma
l Connect the oscilloscope between
carrier level be minimum.
TP401 and GND.
Chroma carrier lew
to be minimum
carrier level be minimum.
l Connect the oscilloscope between
TP401 and GND.
Chroma
carrier levc
to be minimum
17

xv-31 OP
I
l Connect the cilloscope
between the same in amplitude. See the
To be at the same level
l Connect the oscilloscope between
TP803 and GND.
l Turn 1802 so that the offset be
zero. See the figure at right.
l Connect the oscilloscope between
TP804 and GND.
l Turn T801 so that the offset be
zero. See the figure at right.
e Connect the oscilloscope between
l Connect 2.2-kohm resistors to the
emitters of 4804 and Q805. Now
hook up the oscilloscope between
the middle point and GND. See the
Matrix circuit
18

xv-3lOP
16
-
17
-
18
-
19
-
20
Adjustment position
NTSC tint:
R860
Colour
saturation: R858
(su b-colour)
Sub-bias (RGB):
Ri434
Common bias:
R520
Sub-bias (red):
RI602
Sub-bias (blue):
RI608
Adjustment condition
l Receive the NTSC colour bar signal.
l Turn the user colour and contrast
controls by ~10 steps toward the red
tint (-10 points).
Connect a 330-,uF capacitor, as
shown below, to drop the Y level.
l Receive the NTSC colour bar signal.
l Connect the oscilloscope between
TP803 and GND.
l Set the colour and contrast controls
to + 7 points.
l Receive the monoscope patter,n
signal.
l Connect the oscilloscope between
TP1405 (G output) and GND.
l Make this adjustment in a dark
room using the following tools and
instruments.
l Receive the NTSC monoscope
pattern signal.
l Receive the NTSC monoscope
pattern signal.
19
Adjustment method
Turn R860 to obtain the waveform
shown below.
To be aligned
To be aligned
Turn R858 to obtain the waveform
shown below.
75% white level
Y B’ue
- w---------
Tobe
aligned
Turn RI434 so that the vertical
sync level difference between two
black portions at TP1405 be
7.8 f 0.1 VP-P.
H Vertical sync
Vertical sync
Adjust R520 so that the tone
contrast be maximum.
Turn RI602 and RI608 until the
best white balance can be
achieved.

xv-31 BP
Adjustment position
Adjustment condition Adjustment method
!I
NTSC horizontal
l Receive the NTSC monoscope Turn the control on the panel (see
center
pattern signal. the figure at.left) to make the
image at the center of the screen.
Horizontal center control
Conneaor 0
fIl
00
El
22 Scanning line
0 Receive the PAL monoscope Adjust
R1119 so that the image
conversion
pattern signal.
should come at the center of the
phase: RI119
screen.
23 Oscillation
0 Ground pin (70) of IClOOl.
Turn LlOOl so that the oscillation
frequency: Ll 001
l Connect the frequency counter
frequency be 15.625 + 0.01 kHz.
between TPlOOl and GND.
24 Oscillation
0 Ground pin (43) of ICl 001. Adjust L1002 so that the oscillation
frequency: b1002
l Connect the frequency counter
frequency be 15.625 + 0.01 kHz.
between TPlOO2 and GND.
25 Sign position:
T2001
l Display the sign on the screen.
l Adjust T2001 to position the sign
on the screen.
l Receive the NTSC monoscope
pattern signal.
0 Press the VOL button.
- -
This symbol to be in contact
with the outer circle
26 Audio output:
R2062
e Connect the voltmeter between Turn up the VOL button from
the center terminal of R2062 and minimum to the fourth step
GND.
(where the second sign becomes
reddish).
Adjust R2062 so that the voltmeter
should read 0.8 2 0.02 V.
20