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Block Diagrams



10. Block Diagrams


SIGNAL PART


SPEAKER R
AUDIO AMP LNA RF TUNER IF MODULE AUDIO MODULE
SPEAKER L
R-CONV.AMP
H-BLK R-CY
DIGITAL PEAKING PICTURE BOOST
RF
CONVERGENCE G-CONV.AMP TUNER
V-BLK G-CY
_ 5.7V
+ MODULE (PIP) R,G,B VIDEO
B-CONV.AMP PROCESSOR
B-CY CTI/Y-DELAY

PIP MODULE R-DRIVE R CRT
H-PARA H/V-PARA DYNAMIC FOCUS
SUM OUTPUT FOCUS 1H DELAY TTX MODULE
V-PARA PACK m-COM G-DRIVE G CRT

CONVERGENCE PART
B-DRIVE B CRT
SMPS PART E2PROM


STR MAIN RECTIFI- EXTERNAL EXTERNAL A/V MULTI DECODER
S6709 TRANS CATION DEFL &
SIGNAL A/V INPUT SWITCHING BLOCK

PHOTO COUPLER ERROR AMP
D.Y
VERTICAL
STR SUB RECTIFI- DEFL PART
S6709 TRANS CATION CONV. & V-AMP & E/W CORRECTION CRT
SOUND HIGH VOLTAGE
BRIDGE PHOTO COUPLER ERROR AMP
RECTIFI- HIGH VOLTAGE HIGH VOLTAGE SCREEN
CATION FBT
DRIVE OUTPUT TR

DUMMY D.Y
D.Y
HORIZONTAL HORIZONTAL HORIZONTAL
DRIVE OUTPUT TR DUMMY FBT



Samsung Electronics 10-1
Schematic Diagrams



12. Schematic Diagrams
12-1 SIGNAL (MICOM,TTX, B+ , AV-S/W)




TP91
TP92




TP93

TP94




: Power Line
: Signal Line



Samsung Electronics 12-1
Schematic Diagrams


12-2 SIGNAL(PIP-IF, AUDIO-MODULE)




TP4




TP6




TP3



TP2



TP1

TP5


: Power Line
: Signal Line




12-2 Samsung Electronics
Schematic Diagrams


12-3 SIGNAL (VIDEO, CHROMA, PEAKING)




TP22




TP28




TP24



TP25
TP27
TP26
TP23




TP21

: Power Line
: Signal Line




Samsung Electronics 12-3
Schematic Diagrams


12-4 SIGNAL (CONV, KARAOKE, COMB-PART)




TP30

TP29




TP32




TP31




: Power Line
: Signal Line




12-4 Samsung Electronics
Schematic Diagrams


12-5 P0WER




TP83
TP81
TP82




TP84




TP87
TP86



TP85




: Power Line
: Signal Line




Samsung Electronics 12-5
Schematic Diagrams


12-6 DEFL




TP39


TP38




TP42
TP37




TP43
TP41




: Power Line
: Signal Line
TP44




12-6 Samsung Electronics
Schematic Diagrams


12-7 CONVER.




TP62
TP61



TP70




TP71




TP69 TP64
TP63




TP68




TP66




TP67

TP65




: Power Line
: Signal Line




Samsung Electronics 12-7
Schematic Diagrams


12-8 CRT



TP51



TP53


TP52




TP54




TP55

TP56




TP57




12-8 Samsung Electronics
Schematic Diagrams


12-9 PWB-PIP




: Power Line
: Signal Line




Samsung Electronics 12-9
Schematic Diagrams


12-10 AUDIO-MODULE




: Power Line
: Signal Line




12-10 Samsung Electronics
Schematic Diagrams


12-11 IF




: Power Line
: Signal Line




Samsung Electronics 12-11
Schematic Diagrams


12-12 TTX




: Power Line
: Signal Line




12-12 Samsung Electronics
Schematic Diagrams


12-13 CONTROL-JACK-A, CONTROL-DOOR,PRE-AMP




: Power Line
: Signal Line




Samsung Electronics 12-13
Schematic Diagrams


12-14 A/V-SWITCHING




TP34


TP33




TP35 TP36




12-14 Samsung Electronics
Schematic Diagrams


12-15 MIC.MASTER S/W




Samsung Electronics 12-15
Schematic Diagrams




TP13
TP12
TP11

TP14



TP15




TP16


TP17


TP18




12-16 Samsung Electronics
Wiring Diagram



11. Wiring Diagram




CTRL-MIC


CNE01
CN902
CTRL-DOOR CRTL-JACK CRT-R
H/V
CN802
CN803 POWER
CN503-1 CN503 CN504
CN904 CN901
R
G FOUCS PACK CN801
CN601 CN905
B CONVERGENCE SIGNAL CN201 CRT-G
CN701
H/V


CN203 CN202 CNZ01 CNQ01 CN702 PREAMP CN501
CN502-1 CN502 CN505
LNA CN201 CN202
VM
R
G
CONVG. DEFLECTION
B A/V BACK CRT-B
MODULE
H/V

CN401
FOCUS SCREEN
R, G, B, DY CNH01




Samsung Electronics 11-1
Troubleshooting




6. Troubleshooting



6-1 No Power


Abnormal 0V Check CN801 Pin 2 Normal 12V
(STB B + ).




Abnormal Normal 3V 0V
Check C801 Check the voltage
on CN801 Pin 1




Check/Replace Check/Replace Normal Abnormal Check IC901
D808 & R801 Check F851.
HC801 (VCC)



Check/Replace
Q401 and Q402



Replace F854




Normal 0V Check the base voltage Abnormal 0.6V
on Q852


Check/Replace Check/Replace
Q851 and Q852. Q854.




Normal

Abnormal


Check IC901 Replace IC901
Peripheral Circuits




Samsung Electronics 6-1
Troubleshooting


6-2 No Picture




Check TDA4780 Normal
(IC203) Pin 1, Pin 13
Low-High

Check/Replace
Abnormal m-com (IC901



Check TDA9160 (IC202) Abnormal
Y-output (Pin 1)


Replace
Normal TDA9160 (IC202)




Check TDA4780 Abnormal
Y-input (Pin 8)


Check/Replace
Normal IC203


Check Pin 8 of IC501,
IC502, IC503




6-2 Samsung Electronics
Troubleshooting


6-3 No Sound




Normal (_28V)
+ Abnormal (0V)
Check pins 9 and 11
of HC651




Check D859,D860,
Check the Pin 5 Abnormal
of the CN601(mute) F852, F853 on the SMPS



Check/Replace RL651
Normal and m-com (IC901



Check pins 3 and 5 of Normal
the Audio module



Abnormal


Check/Replace Abnormal Check pins 24 and 22
upc1853 (IC602) of the Audio mdl



Check/Replace KA2192, Normal
TC4053BP on the A/V switch



Abnormal Check pins 16 and 18 Normal
of the audio mdl



Check/Replace Check/Replace
TDA9840 IC601




Samsung Electronics 6-3
Troubleshooting


6-4 Horizontal Line




Normal Check the Waveform of Abnormal
IC202 Pin 15,16



Check IC301 and its Check IC202 and its
peripheral circuits peripherial circuits




6-5 Convergence Misaligned




Check
Normal the waveform of each Abnormal
terminal in Convergence Module
CN203




Normal Check the voltage on Abnormal Check the Waveform of Abnormal
Normal
CN803 pins 4,6 each terminal in Convergence
Module CN202

After checking the _ 26V
+ Check the Circuits
Check the Differential Replace the
load line, check/replace Connected to each
Amplifier of each Convergence Module.
the Fuse F854, F855 on terminal of Convergence
Convergence terminal
the SMPS board Module CN202




6-4 Samsung Electronics
5. Alignment and Adjustments

5-1 RF AGC Adjustment 5-4 FBT B+ Voltage Adjustment
1. Tune to the strongest local station. PREPARATION

2. Turn the AGC control fully clockwise (VR111, 1. Note: The B+ voltage adjustment (FBT) is
on the IF board). done during the chassis check at the factory.
Perform this adjustment after Sub-Brightness
3. Adjust the AGC control until noise (snow) and Convergence.
disappears from the screen.
2. Warm up the TV for at least for 10 minutes.
5-2 Screen Adjustment
3. Input 100% white pattern.
1. Turn to the Active channel.
4. Select the "STANDARD" video mode.
2. Adjust the VR (VR501, VR531, VR561) screen
ADJUSTMENT
for a normal picture is (no blooming or flyback
line).
1. Connect the leads of a multimeter to GT405
3. Adjust the FOCUS control for well defined (B+) and GT406(G).
scanning lines in the center area of the screen.
2. Set VR401 (on deflection board) to either
126.9V (for NTSC), or 125.6V (for PAL).
5-3 Horizontal Dynamic Focus
Adjustment

PREPARATION
1. Input a crosshatch pattern.

2. Cover the Red and Blue Lenses.

3. Enter "STANDARD" video mode.

4. Adjust the Green Lens for best focus.

ADJUSTMENT
Adjust VRZ01 (located on the convergence board).
Balance the left and right sides of the dynamic
focus lines.




Fig. 5-1 Balance the left and right sides




Samsung Electronics 5-1
Alignment and Adjustments


5-5 Lens Focus and Static Focus
Adjustment
5-5-1 Static Focus (Electric Focus) 5-5-2 Lens Focus

PREPARATION PREPARATION
1. Select the "STANDARD" video mode. 1. Do this adjustment after the static focus
adjustment .
2. Input a crosshatch pattern.
2. Select the " STANDARD" video mode.
3. Cover the lenses that are not being adjusted. (Contrast: 64, Brightness: 32)

4. Connect a convergence jig and read data. 3. Input a cross hatch pattern.

5. Adjust the lens for best focus. ADJUSTMENT

ADJUSTMENT 1. Loosen the lens screws.

Vary the focus pack VR (Red, Blue) on the front 2. Cover the two lenses that are not being
cabinet. Adjust the TV for best possible focus adjusted.
around the center of the crosshatch pattern,
without losing overall screen balance. 3. Adjust the lens, observing the color aberration
vertically and horizontally within 3 blocks of
the center of the crosshatch pattern.

4. When the lens is turned clockwise, the color
aberration will change as follows:
Lens Color Aberration Change
R Orange --- Crimson
Fig. 5-2 Crosshatch Pattern. Examine these points together G Blue --- Red
B Purple --- Green
5. Green lens adjustment:
Set the lens at the point where Blue just
changes to Red. If the color aberration is
irregular throughout the picture screen,
adjust the lens to show Red within a 3-block
grid around the horizontal center-line.

Observe the the color aberration near the
intersection points of the horizontal and
vertical lines (approximately 1 - 3 mm area).
If the aberration is irregular, adjust the lens as
shown in the diagram below. (Accurate
alignment of Green is important for overall
color quality.)
Fig. 5-3 Color Aberration
6. Set the Red lens at the point where Orange
becomes Crimson.

7. Set the Blue lens at the point where Purple
becomes Green.




5-2 Samsung Electronics
Alignment and Adjustments


5-6 Convergence Adjustment

5-6-1 Convergence Adjustment

1. Input a PAL pattern. 11. Adjust Blue as above.

2. Warm up the set for 30 minutes before 12. After the adjustments are completed, press
adjustment. "Recall" to save the data.

3. Display the test pattern (Crosshatch) by 13. Change from PAL mode to NTSC when
pressing the remote-control keys in this making NTSC adjustments.
sequence : Conv.