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.
C77
a
swact
(MASTR
$73)
Feet
inal
ee
a
13.188 2504
: : i
—
—
oo
Tet
:
Ele
nCTON 5
:
nee!
onez
——
Lns2
382
a3e3
|
Ose)
a
ages
ST
AI
Caz
a aa va203 vant Yas
eac eec csc
“tn Lses
1D
eS! il
xe
sw2et
RLast
atces
vense
Rat oneae7 147
ces
ve-160) Cr irany
fc. aye bed
cana meme ey 1472 BM 8 Dz
a
ece
:
vaiss
Q
Te-ne 7
x2 o Tueer
a T11
an mn e
won
we
{|
cnnes
Ece
TT)
ram
an
Pe
n
:D
Ears carez
: Oo pre 0 ye Qa
coset TRIG coc cnc J

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.