Samsung CX528ZSE User manual

Sy
WSC
FILE
NO.
:
P54S+RM101+SIF
CON.
SERVICE
MANUAL
COLOUR
TV
RECEIVER
REMOTE
CONTROL
SYSTEM
CHASSIS
NO.:
P54S
&
RM101
MODEL
NO.:
CX528ZSE/SGVX
SAFETY CAUTION :
Before
serving
this
chassis
it
is
important
that
the
service
techinician
read
and
follow
the
a
“Safety
Precaution”
and
"Product
Safety
Notice”
in
this
Service
Manual.
SPECIFICATIONS
Television
System
PAL/SECAM
PAL/SECAM SECAM
Bend
B.G D.K
VHF
PAL/SECAM SECAM
8.G D.K
Colour
Sub—carrier
34.47
34.47
(Units: MHz)
Channel Coverage
Intermediate
Frequencies
Picture
Tube
14”,
16",
18,
20°
diagonal
measured,
In—line—gun,
Black
stripe
90
degrees
deflection
VHF
/UHF
Telescopic
dipole
entenna
(75
ohm
unbalanced
type)
Power
Requirements
220V,
AC.
SOHz

PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have
special sefety-related characteristics. These characteristics
are often passed unnoticed by 8 visual inspection and the
protection afforded by them cannot necessarily be ob—
tained by using replacement components rated for higher
voltage,wattage,etc. Replacement parts which have these
special sefety characteristics are identified in this menue!
and its supplements; electrical components having such fea—
tures are identified by shading on the schematic diagram
and the perts list.
Before replacing any of these components, read the
perts list in this manual carefully. The use of substitute
replacement perts which do not have the same safety
characteristics as specified in the parts list may create
shock,fire,X—ray radiation or other hazards.
SERVICE NOTES
1. When replacing parts or circuit boards, clamp the lead
wires to terminals before soldering.
2. When replacing @ high wattage resistor (oxide metel
film resistor) in circuit board, keep the resistor 10mm
(1/2 in.) away from circuit board.
3. Keep wires away from high voltage or high temperature
components.
4. If any Fuse in this TV receiver is blown, replace it
with the FUSE specified in the chassis parts list.
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SAFETY INSTRUCTIONS
WARNING : BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION,” "SAFETY PRECAUTION”,
"PRODUCT SAFETY NOTICE” AND "SERVICE NOTICES” DESCRIBED BELOW.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazard—
ous X-RAY RADIATION. To avoid such hazards, the high
voltage must not be above the specified limit.
The nominal value of the high voltage of this receiver
is 24.5KV at zero beam current (mininum brightness).
The high voltage must not, under any circumstances,
exceed 25.5KV.
Each time a receiver requires servicing, the high vol-
tage should be checked following the HIGH VOLTAGE
CHECK procedure on this manual. It is recommended
the reading of the high voltage should be recorded as
a part of the service record.
It is important to use an accurate and reliable high
voltage meter.
. The only source of X-RAY RADIATION in this TV re—
ceiver is the picture tube. For continued X-RAY RA-
DIATION protection, the replacement tube must be ex—
actly the same type tube as specified in the parts list.
. Some parts in this receiver have special safety-related
characteristics for X-RAY RADIATION protection.
For continued safety, parts replacement should be un—
dertaken only after referring to the PRODUCT SAFETY
NOTICE.
SAFETY PRECAUTION
—
. Potentials as high as 25,000 volts are present when
this receiver is operating. Operation of the receiver out—
side the cabinet or with back board removed involves
a shock hazard from the receiver.
a. Servicing should not be attempted by anyone who is
not thoroughly familiar with the precautions necessary
when working on high-voltage equipment.
b. Alway discharge the picture tube anode to the re—
ceiver chassis to keep off the shock hazard before
removing the anode cap.
c. Perfectly discharge the high potential of the picture
tube before handling the tube. The picture tube is
highly evacuated and if broken, glass fragments will
on
an
be violently expelled.
. If any Fuse in this TV receiver is blown, replace it with
the FUSE specified in the chassis parts list.
. When replacing parts or circuit boards, wind the lead
wires around terminals before soldering.
When replacing a high wattage resistor (oxide metal
film resistor) in circuit board, keep the resistor 10mm
Keep wires away from high voltage or high temperature
components.
. This receiver can be operated under AC 220-240 volts,
50Hz. NEVER connect to DC supply or any other power.
PRODUCT SAFETY NOTICE
agram and the parts list.
X-RAY RADIATION.
Many electrical and mechanical parts in this chassis have special safety-related characteristics.
stics are often passed unnoticed by a visual inspection and the X-RAY RADIATION protection afforded by then
cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etec. Replace—
ment parts which have these special safety cheracteristics are identified in this manual and its supplements, ele—
ctrical components having such features are identified by the international hazard symbols on the schematic di-
Before replecing any of these components, read the parts list in this manual carefully. The use of substitute re—
placement parts which do not have the same sefety characteristics as specified in the parts list may create
These characteri—

ALIGNMENT
1. GENERAL
Read the following carefully before attempting alignment.
=
)
3)
4)
9)
A warm up period of at least twenty minutes should be allowed for proper stabilization of test equipment and receive
Alignment requires en exact procedure and sequence of contents.
A fine blade non-metallic alignment tool is required for peaking of coils during alignment.
Isolation transformer should be used to prevent shock hazards.
The test equipment specified or its equivalent is required to perform the alignment properly.
Use of equipment that does not meet these requirement may result in improper alignment.
Correct matching of the equipment is essential.
Failure to use the proper matching will result in response which can not represent the true operation of the receiver.
Excessive signal and bias voltages from the generator can cause overloading of the receiver circuits and distortion
of the response curve.
All shields and shield grounding braids must be in place and grounded to chassis before proceeding with alignment.
The A.C. power line voltage should be kept within the standard voltage + 5 volts during alignment.
10) Do not attempt to connect or disconnect any wire while the receiver is in operation.

2. MAGNIFIED RESPONSE ALIGNMENT
2.1. EQUIPMENT
2.1.1. Sweep /Marker generator
2.1.2. Monitor scope (or Oscilloscope)
2.1.3. D.C. Power Supply (+16.5Y)
2.1.4. Bias Supply (+4V ~~ +4.5V)
2.1.5. Matching Pad (See Figure 3)
2.1.6. Direct probe
2.2 CONNECTIONS
MONITOR SCOPE
SWEEP /MARKER GENERATOR

2.3. PREPARATION
2.3.1. Connect the horizontal output of sweep/marker generator to the horizontal input of monitor scope.
2.3.2. Set the monitor scope gain for 0.1V/DIV.
2.3.3. Connect the output of sweep/marker generator in series with matching pad to test point on the tuner thro
10K ohm resistor.
2.3.4. Connect the monitor scope with direct probe to terminal TP—11
2.3.5. Apply +16.5V power supply to TP—16 on main board.
2.3.6. Apply +4V-~+4.5V bias to terminal TP—14 on main board.
2.3.7. Gradually increase or decrease the output of sweep/marker generator to obtain the 1.0Vp—p response curve
on the scope. If necessary, adjust sweep center and sweep width control for the proper location curve.
2.4. STEPS
Adjust the video detector coil (1171) for maximum amplitude at point P. (See Fig..-c 4)
TV SYSTEM TABLE
c
Colour sub—cerrier Picture Intermediate
frequency frequency
PAL B/G,SECAM B/G,D/K 34.47 MHz 38.9 MHz
P
103P 10K OHM
FROM GEN. TO TEST POINT
OUT OF (TP)
75
OHM
C
1V
: Pp
Figure 3
MATCHING PAD Figure 4

3. OVERALL RESPONSE ALIGNMENT
3.1, EQUIPMENT
3.1.1. Sweep/Marker generator
3.1.2. Monitor scope
3.1.3. D.C. Power supply (+16.5V)
3.1.4. Bias Supply (+4V ~ +4.5V)
3.1.5. Direct probe and Matching pad (Figure 5)
3.1.6. Damping Resistor 100 OHM
3.2. CONNECTIONS
MONITOR SCOPE
SWEEP /MARKER GENERATOR
Figure 5 Overall Response Alignment
7

3.3. PREPARATION
3.3.1. Disconnect the CNO1 connector.
3.3.2.
Connect
the
horizontal
output
of
sweep/marker
generator
to
the
horizontal
input
of
monitor
scope.
3.3.3. Set the monitor scope gain for 0.1V/cm.
3.3.4.
Connect
the
output
of
sweep/marker
generator
in
series
with
matching
pad
to
test
point
in
the
tuner
through
10K
ohm
resistor.
(Figure
6)
3.3.5.
Connect
the
monitor
scope
with
direct
probe
to
terminal
TP—11
on
main
board.
3.3.6.
Connect
the
Damping
resistor
(100
ohm)
between
Ti
and
T2
(IC101
#20,
#19).
3.3.7. Apply +16.5 volts bias to terminal TP-16 on main board.
3.5.8.
Apply
+4V-~+4.5
volts
bias
to
terminal
TP—14
on
main
board.
3.3.9.
Gradually
increase
(or
decrease)
the
output
of
sweep
/marker
generator
to
obtain
the
1.0Vp—p
response
curve on the scope.
3.4. STEP
5.4.1.
Adjust
7101
until
the
amplitude
of
response
curve
is
maximum,
the
levels
of
C&P
MARKER
are
the
same
level.
3.4.2.
If
necessary,
adjust
the
core
of
tuner
for
the
response
shown
in
Figure
7.
103P 10K OHM
FROM TO TP
GEN
: OF TUNER
OUTPUT 75 OHM
Figure 6.
Figure 7
IF
Table
(Units:
MHz)
TV
SYSTEM
Ss
C
D
E
P
G
PAL/SECAM,B.G
33.4
34.47 35.05
38.15
38.9
40.4
SECAM
D.K
30.9
32.4
34.47
35.05
38.15
38.9
40.4

4. AFC RESPONSE ALIGNMENT
4.1. EQUIPMENT
4.1.1. Sweep/marker generator
4.1.2, Monitor scope
4.1.3, DC Power supply (+16.5V)
4.1.4, Bias supply (t4V~+4.5V)
4.1.5, Matching Pad
4.1.6. Direct probe
4.1.7. Digital Voltmeter
4.2. PREPARATION
4.2.1. Apply +16.5 volts to TP—16 on main board.
4.2.2. Apply +4V +4.5 volts to TP14 on main board.
4.2.3. Connect the output of sweep/marker generator through the matching pad to test point of tuner.
4.2.4. Connect the monitor scope with direct probe to terminal TP-17.
4.2.5, Put the AFC switch "OFF". (except remote control model)
4.2.6. Gradually increase or decrease the output of sweep/marker generator to obtain the 2Vp—p
response curve.
4.5. STEP
Adjust T172(AFC TANK COIL) the PIF marker position to be kept just the reference level.
After this adjustment, PIF keying pulse on the monitor scope must be in minimum amplitude.
(Refer to Figure 8.)
PIF (P) Point
Minimum
Amplitude
Level
ji 2Vp-p PAL B/G,SECAM B/G,D/K 38.9MHz
Keying pulse
Figure 8. AFC Response Alignment

She
ee
6.1;
6.2:
rae
dies
Tod.
8.1.
8.2.
9. HORIZ. OSC. ADJUSTMENT
PREPARATION
5.1.1. Receive Lion Head Pattern
5.1.2. Short TP-HO and TP—HG with short jumper to ground the sync input for free-running oscillation.
STEPS
5.2.1. According to above item 5.1.2. horiz and Vert sync will be out of sync.
5.2.2. Maintain vert sync best state with VR302 (Vert. Hold)
5.2.3. Set the Horinontal sync to be with VR401 (Horiz. Hold) to remove the candition.
Adjust the HORIZONTAL HOLD to the center of the pull—in range.
6. FOCUS ADJUSTMENT
PREPARATION
6.1.1. Check that the power A.C. line is normal.
(A.C. 220 volt, 50Hz)
6.1.2. Connect A.C. line and the receiver power switch sets in ON” position.
6.1.3. Receive a black and white signal.
6.1.4. Turn the fine tuning control for indication of the clearest picture.
STEP
Adjust the focus control on FBT(T444) for well defined scanning lines in the
center area of the screen.
7, VERTICAL HEIGHT ADJUSTMENT
PREPARATION
7.1.1, Check that the A.C. power line is normal. (AC 220 voit, 50Hz)
7.1.2. Connect A.C. line and the receiver power switch sets in “ON” position.
7.1.3. Set the channel selector to an active channel. (Lion Head Pattern)
SIEPS
7.2.1, Adjust the VERTICAL HEIGHT CONTROL VR302 so that the linearity may be optimum condition when
the inside of the largest circle of test pattern overscan the mask 2 Cm of the top an bottom.
7.2.2, And the center of the circumference circle of test pattern should be visible more than 3 circles.
NOTE
While this alignment, set the brigtness and contrast contro! to maximum position.
8. B+ ADJUSTMENT
Apply voltmeter to TP—125.
Adjust to 125V with VR801 on main board.

-
9.
COLOUR
MATRIX
ADJUSTMENT
9.1. EQUIPMENT
9.1.1. Oscilloscope.
9.1.2. Pattern Generator (FG-70)
9.2, PREPARATION
9.2.1.
Set
the
power
switch
in
“ON”
position.
9.2.2.
Receive
the
PAL
colour
signal
including
U/V
signal
with
colour
ber
pattern
generator.
9.2.3.
Set
the
contrast
(VR202),
Brightness
(VR201)
and
colour
control
(VR501
or
colour
up
button)
to
maximum
position.
9.2.4.
Connect
the
Oscilloscope
probe
to
TP—-51.
9:5. STEPS
< Method 1 >
9.3.1.
Adjust
the
VR507
(DL
phase
control)
to
be
proper
colour
display
9.3.2.
Adjust
Burst
clean
trimmer
(C506)
and
DL-Matching
coil
(L504)
to
be
minimum
venetion blind effect.
9.3.3.
If
Venetian
Blind
Effect
appears
after
this
adjustment,
repeat
above
STEP1
and
2.
Figure 7
METHOD 2
1. Receive colour ber pattern.
2.
Connect
the
synchroscope
to
the
TP—51
on
the
main
boerd.
3.
Adjust
C506
so
that
the
non—colour
part
and
horizontel
blenking
part
are
on
the
same
level.
.
Adjust
VR507
so
thet
the
non—colour
part
and
the
(B-Y)
0/180
part
are
on
the
same
level.
5.
Adjust
L504
so
that
each
difference
on
the
respective
H-Blanking
>
| aoe colour
+
peak
become
to
the
minimum.
;
L507
6.
If
venetian
blind
appears
after:
these
adjustments
repest
L504
minimum
difference
non—colour
above
step
3.4
and
5.
level
11

10.1.
10.2.
10. PURITY ADJUSTMENT
PREPARATION
10.1.1.
Operate the receiver for at least 20 minutes to warm up the C.R.T.
10.1.2.
Plug
the
deflection
yoke
in
the
C.R.T.
and
tighten
the
deflection
yoke
clamper
screw
temporarily.
10.1.3. Plug the convergencé yoke in the C.R.T. and set in as shown in Figure 11.
10.1.4. Check that the A.C. power line is normal.
(AC 220 volt 50Hz)
10.1.5. Connect the A.C. line and the receiver power switch sets in "ON” position.
10.1.6. Receive a black and white signal.
SIEPS
10.2.1. Demagnetize the receiver fully by using an external degaussing coil.
10.2.2. Turn the CONTRAST and BRIGHTNESS controls the maximum.
10.2.5.
Adjust
RED
and
BLUE
CUT
OFF
controls
(VR504
and
VR502)
to
provide
only
a
green
raster.
10.2.4. Advance the GREEN CUT OFF control (VR503) if necessary.
10.2.5,
Loosen
the
clamper
screw
holding
the
yoke,
agd
slide
the
yoke
backward
or
forward
to
provide
vertical
green
belt (zone)
in
the
picture
screen.
(Figure
12)
10.2.6. Then tighten the convergence yoke clamper.
10.2.7.
Slowly
move
the
deflection
yoke
forward
and
adjust
for
best
overall
green
screen.
10.2.8. Roughly tighten the deflection yoke clamper.
10.2.9.
Produce
the
blue
and
red
raster
by
low
light
control
and
observe
that
good
purity
is
obtained
on
the
respective field.
10.2.10 Tighten the deflection yoke clamper.

6 Pole magnet
4 Pole magnet
2 Pole magnet
Convergence magnet assembly
Figure 11.
VERTICAL GREEN BAND
Figure 12
13

11. CENTER CONVERGENCE ADJUSTMENT
11. 1. PREPARATION
11.1.1.
W. 1. 2.
WW. 1. 3.
1. 1. 4,
My Ze HSER S
1. 2. 1.
11.2. 2.
1. 2. 3.
11,2. 4.
11, 2. 5.
Tt. 3. NOTE
Operate the receiver for at least 20 minutes before attempting convergence adjustment.
Check that the power A.C. line is normal.
(AC 220 volt, 50Hz)
Connect A.C. line and the receiver power switch sets in “ON” position.
Receive a crosshatch pattern or dot pattern with a colour bar signal generator.
Adjust the brightness and contrast controls for well defined picture.
Adjust the two taps of the 4 pole magnets to change the angle between them and superimpose
red and blue vertical lines in the centre area of the screen.
Turn the both tabs at the same time keeping the constant angle to superimpose red and blue
horizontal lines at the center of the screen.
Adjust two taps of 6-pole magnets to superimpose red and blue line with green. Adjusting the
angle affects the vertical lines and rotating both magnets affects the horizontal lines.
Repeat adjustment (2~4) if necessary.
As 4 pole magnets and 6 pole magnets interact and it makes dots movement complex, practice above
steps until understanding red and blue movement. (Figure 13)
RED/BLUE >} ]e GREEN
! !
BLUE ->| je RED
RED/BLUE -—
GREEN -—
4 POLE MAGNET MOVEMENT 6 POLE MAGNET MOVEMENT
14

12.2,
CENTER CONVERGENCE BY CONVERGENCE MAGNETS
ADJUST THE ANGLE
(VERTICAL LINES) FIXED
ROTATE TWO TABS
AT THE SAME TIME
ADJUSTMENT OF MAGNETS
Figure 15 (HORIZONTAL LINES)
BGR ee age
G
{ ' R a _ B G R
iI it
iT T!
25g
ae =o G
BGR i
INCLINE THE YOKE UP INCLINE THE YOKE RIGHT
(OR DOWN) (OR LEFT)
Figure 14. CIRCUMFERENCE CONVERGENCE BY DEF. YOKE
12. WHITE BALANCE ADJUSTMENT
PREPARATION
12.
12.
12.
12.
12.
12.
12.
12.
12. 2. 4.
12. 2.5
1.1.
1. 2
1.3
1. 4.
12. 1. 5.
1. 6
1.7
1. 8
1. 9
Operate the receiver for at least 20 minutes before attempting white balance adjustment.
Connect A.C. line and the receiver power switch sets in “ON” position.
Receive a black and white signal (Lion haed pattern is better).
Set the colour control to center position.
Set the brightness and contrast controls to maximum position
Set the red, blue and green low light controls to mechanical center position.
Set the blue and green drive controls to mechanical center position.
Set the screen VR control on FBT to minimum position. (fully counter—clockwise)
Temporarily slide the service switch (SW201) on main board to left (Service) position to cut off
the vertical oscillation.
Rotate the SCREEN control on FBT (1444) gradually clockwise until the first horizontal line
appears slightly on the screen.
Adjust the two CUT-OFF controls to obtain the slightly lighted horizontal line in the same levels
of three colours (red, green, blue)
The line look like white if the CUT-OFF controls are adjusted properly.
Reset the SERVICE Switch (SW201) on main board to right position to obtain a raster.
("NORMAL” Position)
Adjust the blue and green drive controls to obtain proper white—bslenced picture in high light areas.
Set the contrast contro! to minimum position and turn the brightenss control slightly counterclockwise
to obtain a dark gray raster.
Then check the white balance in low brightness.
If the white balance is not enough, repeat step (1~4) for correct white balance.
15

13. CIRCUMFERENCE CONVERGENCE ADJUSTMENT
13. 1. PREPARATION
iP aoe (aa?
13. 1.2.
13. 1. 3.
13. 1. 4.
19..25: STEPS
13. 2. 1.
13, 2. 2.
13. 2. 4.
13. 2. 5.
Operate the receiver for at least 20 minutes before attempting circumference convergence adjustment.
Check that the power A.C. line is normal.
(AC 220 volt, 50Hz)
Connect A.C. line and the receiver power switch sets in “ON” position.
Receive a cross hatch pattern with a colour bar signal generator.
Temporarily place a rubber wedge (Spacer D.Y) as shown in Figure 16.
Tilt
front
of
the
deflection
yoke
up
and
down
to
obtain
better
convergence
in
circumference.
(Figure
14
Push
the
mounted
wedge
in
to
the
space
between
picture
tube
and
deflection
Yoke
to
fix
the
Yoke.
temporerily
in
place.
Put other wedge into bottom space and remove the cover paper to stick.
Tilt front of the yoke right or left to obtain better convergence in circumference.
Keep the yoke position and put another wedge in either upper space.
Remove cover paper and stick the wedge on picutre tube to fix the yoke.
Detach the temporarily mounted wedge and put it in another upper space.
Stick it on picture tube to fix the yoke.
After fixing three wedges, recheck overall convergence.
Tighten the screw firmly to fix the yoke and check the yoke is firm.
Stick three adhesive tapes on wedges.
13. 3. PRELIMINARY PREPARATION OF A WEDGE
13. 3. 1.
13. 3. 2.
13. 3. 3.
Paint the silicon bond on the edge of the wedge as shown in Figure 15.
Remove the cover paper and stick it on picture tube within 10 minutes.
Push a wedge into the space between picture tube and deflection yoke as shown in Figure 16.

RUBBER WEDGE
SILICON BOND ADHESIVE TAPE
COVER PAPER
Figure 15. RUBBER WEDGE
TEMPORARY
MOUNTING
120°
"DEFLECTION YOKE
PURITY AND
CONVERGENCE
MAGNET ASSY
Yr “es
3imm (1-3/16")
GLASS CLOTH TAPE
Figure 16. RUBBER WEDGES LOCATION

14.
5:
1
ae
z,
14. R. F. AGC ADJUSTMENT
PREPARATION
14.
1.
1.
Connect
A.C.
line
and
the
receiver
power
switch
in
“ON”
position.
14.
1.
2.
Connect
the
external
antenna
to
tuner
input.
14.
1.
3.
Receive
Lion
Head
Pattern.
14.1.
4.
Set the
signal
strength
to
be
60
dB.
14.
1.
5.
Turn
the
AGC—Delay
control
(VR151)
on
main
board
to
fully
counter
clockwise
position.
STEPS
14.
2.
1.
Turn
the
fine
tuning
control
for
indication
clearest
picture.
14.
2.
2.
Turn
the
AGC—Delay
control
(VR151)
on
main
board
to
clockwise
until
snow
noise
just
disappears
from
the
screen.
14.
2. 3.
Vary
signal
strength
from
weak
to
strong.
(60dB~90dB)
If
noise
or
saturation
appears,
turn
the
VR151
slightly
to
the
left
or
right
to
obtain
for
clearest
picture.
15.
SUB-BRIGHTNESS
ADJUSTMENT
EQUIPMENT
V.T.V.M. or digital voltmeter.
PREPARATION
15.
2.
1.
Receive
philips
colour
pattern.
15.
2
Set
the
contrast
and
colour
controls
to
minimum
postition
brightness
control
to
maximum.
15.
2
Set
the
A.F.C.
switch
"ON”
position.
(except
remote
control
model)
STEPS
15.
3.
1.
Connect
the
VTVM
or
digital
voltmeter
between
terminal
"#2"
(+lead)
and
"#Y"
(-lead)
on
main
board
respectively.
15.
3.
2.
Adjust
the
SUB-BRIGHTNESS
CONTROL
(VR203)
on
main
board
for
0.25
volts
40.05
volts
on
VTVM.
15.
3.
3.
Check
the
proper
picture
variation
by
rotating
the
brightness
and
contrast
control
to
both
extremes.
If
the
picture
does
not
appear
dark
with
the
contrast
and
brightness
controls
turned
to
the
minimum
or
not
appear
bright
with
the
controls
turned
to
the
maximum,
adjusted
the
sub—bright
control
again
for
the
acceptable
picture.
NOTE
Operate
the
receiver
for
at
least
20
minutes
before
attempting
adjustment.

PREPARATIONS ____. 1.
16.1.
16.2.
16.3.
16. SECAM COLOUR ALIGNMENT
horizontal voltage.
. Set the time division of the scope to 20 us/cm.
. Set the Vert. Gain to 0.1V/cm.
. Receive SECAM colour pattern.
. Push the AFC SW ON. (except remote control model)
mm —- WG dH
Bell Filter Alignment --..---
16.1.1. Connect the probe (10:1) of the scope to TP—8t.
16.1.2. Adjust LN51 so that each bar of (R-Y) and (B-Y) becomes even respectively. (Figure 1)
WlY M ala WIY clo |u}e a PROPER ALIGNMENT
IMPROPER ALIGNMENT
SECAM Colour Ident Alignment -.---_-
16.2.1. Connect the probe of the scope to IP—71.
16.2.2. Adjust LN52 (Ident. Det. Coil) so that DC voltage is maximum.
SECAM chroma DET, Coil alignment __-__-_--
16.3.1. Connect the probe of the oscilloscope to TP—61.
16.3.2. Adjust LN54 (R-Y Demod, Coil) so that non colour part and horizontal blanking part are on the
same level. (Figure 3)
16.3.3. Further, change connection of scope from TP61 to TP51 and adjust LNSS (B-Y Demod, Coil) the
same as above. (Figure 4)
Setting the trigger mode of the Oscilloscope to EXT. mode, hold the sync. using the induced
. Rotate the colour, Brightness and contrast control to maximum position. (VR501, VR201, VR202)

17.1,
17.2.
17.3.
(R-Y)
(B-Y)
IMPROPER
ALIGNMENT
IMPROPE
| ALIGNME
HORIZ.
BLANKING
HORIZ.
BLANKING
PROPER
ALIGNMENT
PROPER
ALIGNMEN
Figure
3
Figure
4
17,
SIF
CONVERTER
ALIGNMENT
EQUIPMENT
17.1.1. Oscilloscope
17.1.2.
Audio
Analyzer
or
Distortion
Meter.
17.1.3,
Decade
Resistance
Box
PREPARATION
17.2.1.
Receive
some
pattern
which
hes
the
sound
frequency
of
4G0Hz
or
1KHz.
STEPS
17.3.1.
Connect
a
audio
analyzer
(or
distortion
meter.)
with
a
decade
resistance
box.
17.3.2.
Connect
the
decade
resistance
box's
probe
to
the
sound
output
terminal,
CN601
of
main
chassis.
17.3.3.
Adjust
the
volume
contol
for
500mW
of
the
sound
output
wattage.
17.3.4.
Adjust
the
STO1,
IFT
of
the
PWB-SIF
converter
for
the
least
distortion
level
with
audio
analyzer(
or
distortion
meter).
20