Samsung hcm4216wx service manual

PROJECTION TV RECEIVER
Chassis : P55A Model: HCM4216WX/XAC
PROJECTION TV RECEIVER CONTENTS
Precautions
Reference Information
Specifications
Troubleshooting
Exploded View and Parts List
Electric Parts List
Block Diagrams
Wiring Diagram
Schematic Diagrams
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
1. Precautions
1-1 Safety Precautions
1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.
2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.
3. Make sure that there are no cabinet openings through which people—particularly children—might insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet
ventilation slots, and improperly fitted back
covers.
If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer.
4. Leakage Current Hot Check (Figure 1-1): Warning: Do not use an isolation transformer during this test. Use a leakage­current tester or a metering system that complies with American National Standards Institute (ANIS C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).
5. With the unit completely reassembled, plug the AC line cord directly into the power outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the power­plug prongs in the AC outlet and repeat the test.
Fig. 1-1 AC Leakage Test
6. Antenna Cold Check: With the unit’s AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector.
7. X-ray Limits: The picture tube is especially designed to pro­hibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original. Carefully reinstall the picture tube shields and mounting hardware; these also provide X-ray protection.
8. High Voltage Limits: High voltage must be measured each time ser­vicing is done on the B+, horizontal deflection or high voltage circuits. Correct operation of the X-ray protection circuits must be reconfirmed whenever they are serviced.
(X-ray protection circuits also may be called
“horizontal disable” or “hold-down”.)
Heed the high voltage limits. These include the X–ray Protection Specifications Label, and the Product Safety and X-ray Warning Note on the service data schematic.
Precautions
Samsung Electronics 1-1
LEAKAGE CURRENT
TESTER
DEVICE UNDER
TEST
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
EARTH
GROUND
(READING SHOULD
NOT BE ABOVE
0.5mA)
Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays.
1-1 Safety Precautions (Continued)
9. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.
10. Design Alteration Warning: Never alter or add to the mechanical or electrical design of this unit. Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturer’s warranty.
11. Hot Chassis Warning: Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord. If an isolation transformer is not used, these units may be safely serviced only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC source.
To confirm that the AC power plug is inserted correctly, do the following: Using an AC voltmeter, measure the voltage between the chassis and a known earth ground. If the reading is greater than 1.0V, remove the AC power plug, reverse its polarity and reinsert. Re-measure the voltage between the chassis and ground.
12. Some TV chassis are designed to operate with 85 volts AC between chassis and ground, regardless of the AC plug polarity. These units can be safely serviced only if an isolation transformer inserted between the receiver and the power source.
13. Some TV chassis have a secondary ground system in addition to the main chassis ground. This secondary ground system is not isolated from the AC power line. The two ground systems are electrically separated by insulating material that must not be defeated or altered.
14. Components, parts and wiring that appear to have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications. Always determine the cause of damage or overheat­ing, and correct any potential hazards.
15. Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.
16. Picture Tube Implosion Warning: The picture tube in this receiver employs “integral implosion” protection. To ensure continued implosion protection, make sure that the replacement picture tube is the same as the original.
17. Do not remove, install or handle the picture tube without first putting on shatterproof goggles equipped with side shields. Never handle the picture tube by its neck. Some “in-line” picture tubes are equipped with a permanently attached deflection yoke; do not try to remove such “permanently attached” yokes from the picture tube.
18. Product Safety Notice: Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement compo­nent differs from the original—even if the replacement is rated for higher voltage, wattage, etc.
Components that are critical for safety are indicated in the circuit diagram by shading, ( ) or ( ).
Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.
Precautions
1-2 Samsung Electronics
1-2 Servicing Precautions
1. Servicing precautions are printed on the cabinet. Follow them.
2. Always unplug the unit’s AC power cord from the AC power source before attempting to: (a) Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.
3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.
4. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged.
5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).
6. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500V) to the blades of the AC plug.
The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.
7. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.
8. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last.
9. When some parts inside the optical engine (except lamp) are damaged, replace the whole optical engine.
Precautions
Samsung Electronics 1-3
Warning 1 : First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a
conflict between the servicing and safety precautions, always follow the safety precautions.
Warning 2 : An electrolytic capacitor installed with the wrong polarity might explode.
“CAUTION : Double-pole/neutral fusing”
1-3 Precautions for Electrostatically Sensitive Devices (ESDs)
1. Some semiconductor (“solid state”) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.
2. Immediately before handling any semicon ductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying power— this is an electric shock precaution.)
3. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of electrostatic charge.
4. Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDs.
5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.
6. Use only an anti-static solder removal device. Many solder removal devices are not rated as “anti-static”; these can accumulate sufficient electrical charge to damage ESDs.
7. Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.
8. Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.
9. Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD.
Precautions
1-4 Samsung Electronics
CAUTION
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.
Reference Information
Samsung Electronics 2-1
2. Reference Information
2-1 Tables of Abbreviations and Acronyms
A Ah Å dB dBm
°C °F °K F G GHz g H Hz h ips kWh kg kHz k km km/h kV kVA kW I MHz
Ampere Ampere-hour Angstrom Decibel Decibel Referenced to One Milliwatt Degree Celsius Degree Fahrenheit degree Kelvin Farad Gauss Gigahertz Gram Henry Hertz Hour Inches Per Second Kilowatt-hour Kilogram Kilohertz Kilohm Kilometer Kilometer Per Hour Kilovolt Kilovolt-ampere Kilowatt Liter Megahertz
MV MW M m µA µF µH µm µs µW mA mg mH mI mm ms mV nF
pF Ib rpm rps s V VA W Wh
Megavolt Megawatt Megohm Meter Microampere Microfarad Microhenry Micrometer Microsecond Microwatt Milliampere Milligram Millihenry Milliliter Millimeter Millisecond Millivolt Nanofarad Ohm Picofarad Pound Revolutions Per Minute Revolutions Per Second Second (Time) Volt Volt-ampere Watt Watt-hour
Table 2-1 Abbreviations
Reference Information
2-2 Samsung Electronics
Table 2-2 Table of Acronyms
ABL AC ACC AF AFC AFT AGC AM ANSI APC APC A/V AVC BAL BPF B-Y CATV CB CCD CCTV Ch CRT CW DC DVM EIA ESD ESD FBP FBT FF FM FS GND G-Y H HF HI-FI IC IC IF
Automatic Brightness Limiter Alternating Current Automatic Chroma Control Audio Frequency Automatic Frequency Control Automatic Fine Tuning Automatic Gain Control Amplitude Modulation American National Standards Institute Automatic Phase Control Automatic Picture Control Audio-Video Automatic Volume Control Balance Bandpass Filter Blue-Y Community Antenna Television (Cable TV) Citizens Band Charge Coupled Device Closed Circuit Television Channel Cathode Ray Tube Continuous Wave Direct Current Digital Volt Meter Electronics Industries Association Electrostatic Discharge Electrostatically Sensitive Device Feedback Pulse Flyback Transformer Flip-Flop Frequency Modulation Fail Safe Ground Green-Y High High-Frequency High Fidelity Inductance-Capacitance Integrated Circuit Intermediate Frequency
I/O L L LED LF MOSFET MTS NAB NEC NTSC OSD PCB PLL PWM QIF R RC RF R-Y SAP SAW SIF SMPS S/N SW TP TTL TV UHF UL UV VCD VCO VCXO VHF VIF VR VTR VTVM TR
Input/output Left Low Light Emitting Diode Low Frequency Metal-Oxide-Semiconductor-Field-Effect-Tr Multi-channel Television Sound National Association of Broadcasters National Electric Code National Television Systems Committee On Screen Display Printed Circuit Board Phase-Locked Loop Pulse Width Modulation Quadrature Intermediate Frequency Right Resistor & Capacitor Radio Frequency Red-Y Second Audio Program Surface Acoustic Wave(Filter) Sound Intermediate Frequency Switching Mode Power Supply Signal/Noise Switch Test Point Transistor Transistor Logic Television Ultra High Frequency Underwriters Laboratories Ultraviolet Variable-Capacitance Diode Voltage Controlled Oscillator Voltage Controlled Crystal Oscillator Very High Frequency Video Intermediate Frequency Variable Resistor Video Tape Recorder Vacuum Tube Voltmeter Transistor
Reference Information
Samsung Electronics 2-3
2-2 Description of Dynamic Focus
Most large-screen video display devices that are using CRT (including CDT) usually apply the Dynamic Focus (hereinafter D/F) circuit.
As CRT has non-spherical surface (perfect spherical surface = 1, non-spherical surface R>1), the distance that the electron beam emitted from the electron gun reaches to the center of CRT is different from the one that the electron beam reaches to the corners. (See Figure 1.) Only the beam, which has the equal distance as the beam from the electron gun to the center of CRT surface, can maintain the optimum focus. By this reason, focus dagradation at corners occurs inevitably. To recover this, the speed of the electron beam injected into the corners of CRT should increase and the focus dagradation by the difference of distances can be compensated. Increasing the voltage is used as a method of increasing the speed of the electron beam at the corners of screen. In this case, an ideal D/F voltage waveform is the form of parabola where the center of screen has low voltage and the corners has the highest voltages. The horizontal D/F waveform compensates the focus dagradation at left and right sides, but the vertical D/F waveform does at top and bottom sides. The horizontal D/F and vertical D/F waveforms are separately created and mix two signals to compensate the focus of the whole screen. And the vertical Dynamic Focus waveform is composed of the horizontal Dynamic Focus waveforms as much as the number of scanning lines. (See Figure 2.)
Fig. 1 Dynamic Focus Diagram (Horizantal)
Fig. 2 H/V Dynamic Focus Waveform
Stopped 2002/03/05 08:22:40
=Filter= Smoothing : OFF BW : FULL
CH1 : 0.00V CH2 : 0.000V CH3 : 0.0000V CH4 : -------
CH2=500mV
DC 10:1
CH2=500mV
=Offset=
ZOOM
=Record Length=
Main : 10K Zoom : 100
NORM:200kS/s
=Trigger= Mode : AUTO Type : EDGE CH2 Delay : 676.7ns Hold Off : MINIMUM
(5ms/div)
5ms/div
50us/div
=Trace2= Rms 1.194V Freq 15.15kHz
Ver. D/F Waveform
Hor. D/F Waveform
Reference Information
2-4 Samsung Electronics
2-3 IC Line Up
2-3-1 Progressive
No Block Name IC Location IC Name CODE-NO
1
MAIN
Table 2 - 3 IC Line - Up
IC601 TDA7265 AA96-00623E (ASSY)
IC602 MSP3420G (QFP) 1204-002002
IC603 TL062CDT (SOP) 1201-000541
IC604 TL062CDT (SOP) 1201-000541
IC605 TEA6422D (SOP) 1001-001178
IC701 TEA6425D (SOP) 1001-001177
IC702 TEA6425D (SOP) 1001-001177
IC704 PCF8591T 1002-001048
IC801
IC802
IC807 78R12 (DIP)
KA278RA05 X 3EA
+78R09+7808
7905 (DIP) 1203-000119
AA96-00475B (ASSY)
1203-000165
2 Micom
3
PRO-SCAN
4 CG-MDL
IC808 SI-3050C
IC901 SDA5550M (QGP) 204-001912
IC902 24C16 (SOP) 1103-000180
IC903 78RM33D 1203-002302
IC905 M27W201-80F6 (DIP) 1102-001130
IC01 VSP9407 (QFP) 1204-001938
IC02 CXA2151Q (QFP) 1204-001814
IC03 BA7657F (SOP) 1001-001082
IC04 CXA2165Q (QFP) 1204-001989
IC05 LF18 1203-002186
IC06 7027 1203-001211
IC11 78RM33D 1203-002302
IC13 74HC123 (SOP) 0801-000662
IC01
IC02
SDC12 (QFP) BP13-00003A
78RM33D 1203-002302
BP96-00020G (ASSY)
Reference Information
Samsung Electronics 2-5
Table 2 - 3 IC Line - Up (Continued)
No Block Name IC Location IC Name CODE-NO
IC03
IC04
IC05
IC06
IC07
IC08
4
CG-MDL
IC09
IC10
IC11
IC12
IC13
IC14
IC15
IC16
IC17
7042 1203-001824
7S04 0801-002345
24C64 (SOP) 1103-001195
TSC871251G2D (PLCC) AA09-00032A
EL2250CS (SOP) 1201-001520
74HC4052 (SOP) 1001-000164
072 (SOP) 1201-001504
072 (SOP) 1201-001504
072 (SOP) 1201-001504
LM324AM (SOP) 1201-001135
NC7SB3157 (SOT) 1001-001155
072 (SOP) 1201-001504
7S04 (SOP) 0801-002345
7S04 (SOP) 0801-002345
TLC2932IPWLE (SOP) 1209-001163
5 SUB
6 CRT
7
CG-AMP
ICS801
ICS802
IC301
IC421
IC430
IC431
IC471
IC831S
IC851
ICR01S
PC801S
PC811S
IC501, 531, 561
ICZ103, 104
VIPER12A 1203-002177
KA7805 1203-000568
LA7845 1204-000517
78R12 1203-000165
317 (TO-220) 1203-000161
MC4558C 1201-000191
TL494CN 1203-000610
STR-X6456 AA13-00105A
SE110N 1203-001400
431 (TO-92) 1203-001217
PS2561 0604-001032
PS2561 0604-001032
TDA6111Q 1201-001131
STK392-010 1201-001512
Reference Information
2-6 Samsung Electronics
2-4 MICOM IIC BUS LINE -UP
SDA...
SCL1 : 14 SCL2 : 11
I M
­4
7 4 A
SDA1 : 13 SDA2 : 10
(
M I C O M
)
(
E P R O M
)
M 2 7 W 2 0 1
SS D A 5 5 5 0
M
IIC 2 BUS
# : SDA2
# : SCL2
IIC 1 BUS
# : SDA1
# : SCL1
M27W201 (EPROM)
SCL : 6 SDA : 5
SCL : 2 SDA : 3
SCL : 2 SDA : 3
SCL : 4 SDA : 2
SCL : 4 SDA : 2
SCL : 27 SDA : 28
SCL : 10 SDA : 9
SCL : 6 SDA : 7
SCL : 6 SDA : 7
SCL : 13 SDA : 6
SCL : 26 SDA : 25
24C16 (IC902) Slave Addr : A0h
MSP3420/MSP3452 (IC601) Slave Addr : 80h
TEA6422D (IC605) Slave Addr : 98h
TEA6425D (IC701) Slave Addr : 90h
TEA6425D (IC702) Slave Addr : 96h
PCF8591T (IC704) Slave Addr : 92h
TCPN3081PC09A(S) (TU02) Slave Addr : C6h
TCPN3081PC09A(S) (TU04) Slave Addr : C0h
VSP9407 (IC01A) Slave Addr : B0h
CXA2151Q (IC02) Slave Addr : 84h
CXA2150AQ (IC04) Slave Addr : 86h
Micom
MDL
MAIN
MAIN
MAIN
MAIN
MAIN
MAIN
MAIN
Proscan
MDL
Proscan
MDL
Proscan
MDL
SCL : 30 SDA : 31
SCL : 59 SDA : 60
SCL : 3 SDA : 4
UPD64083GF (IC09) Slave Addr : B8h
SDC12 (IC01) Slave Addr : 20h
TSC87251G2D (IC06) Slave Addr : 20h
Proscan
MDL
CG MDL
CG MDL
Specifications
Samsung Electronics 3-1
3. Specifications
Broadcasting System
Scanning System
Tuning Range
Antenna Impedance
Intermediate Frequency
Sound Output
Rated Voltage
W/B Coordinates
High Voltage
FUSE
Power Consumption
Dimension
Weight
NTSC
Progressive Scanning
VHF : CH2 ~ CH13
75 ohm Unbalanced
Video : 45.75 MHz
Sound : 42.25 MHz
Chrominance Subcarrier : 42.17 MHz
STD : 10W
MAX : 15W
120V / 60 Hz
Hx : 266 Hy : 280 Y : 8.9
Lx : 268 Ly : 283 Y : 0.38
29KV
250V/6.3A
CODE NO : 3601-000300
240W
1002 X 450 X 1070mm
39.4 X 17.7 X 42.1 inch
49Kg 108lbs
Specifications
3-2 Samsung Electronics
MENO
Alignment and Adjustments
Samsung Electronics 4-1
4. Alignment and Adjustments
4-1 When entering the service mode:
1. Turn on the TV, and then select “STANDARD”on the picture adjustment mode.
2. Turn off the TV (STAND-BY).
3. Enter the service mode by pressing the remote control keys in the following sequence :
Note : If necessary, re-do steps 1~3.
Initial display when the service mode is switched.
SERVICE / Sim-474A
DEFLECTION 480P OFFSET 1080i OFFSET CONVERGENCE OFFSET VIDEO ADJUST 1 VIDEO ADJUST 2 VIDEO ADJUST 3 VIDEO ADJUST 4 OPTION (E3h 98h 0ch) RESET / 02-05-03
1. When a RF signal is received
MAIN MENU MENU DISPLAY
CH UP/DOWN Select item by moving cursor
VOL UP/DOWN Decrease or increase the adjustment values
3. Service Mode Control Keys
< PRECAUTIONS >
1. When EEPROM IC (IC902) is replaced, first connect the power cord and wait for about 4~5 seconds.
2. After replacing EEPROM IC (IC902), enter the Service mode. Next, enter the standard data or the previous EEPROM IC data before replacement. And then check and adjust any items related to Geometric, Picture, Option.
Alignment and Adjustments
4-2 Samsung Electronics
4-2-1 Defection
4-2 Factory Data
ITEM INITIAL DATA
V Amp
V Shift
H EW
H Shift
V Linearity
Upper Linearity
Lower Linearity
VSC
H Parabola
Upper Corner
Lower Corner
H Trapezium
Bow
Range
0 ~ 63
32
0 ~ 63
0 ~ 63
32
6 fix
7
8
3
10
32
32
32
32
0 ~ 63
0 ~ 15
0 ~ 15
0 ~ 15
0 ~ 15
0 ~ 63
0 ~ 63
0 ~ 63
0 ~ 63
0 ~ 63
EEP-ROM Copy Data
RF
31
29
31
31
7
0
0
7
31
31
31
31
31
480P
-
-
-
-
-
-
-
-
-
-
-
-
-
1080i
-
-
-
-
-
-
-
-
-
-
-
-
-
Remark
variable
variable
fix
fix
fix
fix
fix
fix
fix
fix
fix
fix
Angel
V Position
CXA Left Blk
CXA Right Blk
32
32
35
35
0 ~ 63
0 ~ 63
0 ~ 63
0 ~ 63
31
31
35
35
-
-
-
-
-
-
-
-
fix
fix
fix
fix
Alignment and Adjustments
Samsung Electronics 4-3
4-2-2 480P Offset
ITEM INITIAL DATA
V Amp
V Shift
H EW
H Shift
V Linearity
Upper Linearity
Lower Linearity
VSC
H Parabola
Upper Corner
Lower Corner
H Trapezium
Bow
Range
0
0
0
0
0
0
0
0
0
0
0
0
0
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-15~ 15
-15~ 15
-15~ 15
-15~ 15
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
EEP-ROM Copy Data
RF 480P
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
0
0
0
0
0
1080i
-
-
-
-
-
-
-
-
-
-
-
-
-
Remark
variable
variable
variable
variable
fix
fix
fix
fix
fix
fix
fix
fix
fix
Angel
V Position
CXA Left Blk
CXA Right Blk
0
0
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-
-
-
-
0
0
28
36
-
-
-
-
fix
fix
fix
fix
Alignment and Adjustments
4-4 Samsung Electronics
4-2-3 1080i Offset
ITEM INITIAL DATA
V Amp 0
V Shift 0
H EW 0
H Shift 0
V Linearity 0
Upper Linearity 0
Lower Linearity 0
VSC 0
H Parabola 0
Upper Corner 0
Lower Corner 0
H Trapezium 0
Bow 0
0
0
0
0
0
0
0
0
0
0
0
0
0
Range
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-15~ 15
-15~ 15
-15~ 15
-15~ 15
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
EEP-ROM Copy Data
RF 480P
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1080i
Remark
variable
variable
variable
fix
Angel 0
V Position 0
0
0
CXA Left Blk
CXA Right Blk
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-
-
-
-
-
-
-
-
63
20
Alignment and Adjustments
Samsung Electronics 4-5
4-2-4 CONVERGRNCE OFFSET
ITEM INITIAL DATA
Offset Enable
V Amp
V Shift
H EW
V Amp 1080i
V Shift 1080i
H EW 1080i
Range
0 variable
15
0
15
15
0
15
0 ~ 1
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
-63 ~ 63
EEP-ROM Copy Data
RF 480P
0
15
0
15
15
0
15
Remark
1080i
variable
variable
variable
variable
variable
variable
Alignment and Adjustments
4-6 Samsung Electronics
4-2-5 VIDEO ADJUST 1
ITEM INITIAL DATA
R Cutoff 20
G Cutoff 20
B Cutoff 20
Color On/Off 1
CR offset 32 fix
CB offset 32
R Driver 31
G Driver 31
B Driver 31
Sub Bright 15
Sub Contrast 7
Sub Color 20
SubTint 7
Range
0 ~ 63
0 ~ 63
0 ~ 63
0 ~ 1
0 ~ 15
0 ~ 15
0 ~ 15
0 ~ 15
0 ~ 63
0 ~ 63
0 ~ 15
0 ~ 23
0 ~ 13
EEP-ROM Copy Data
RF-Copy
31
31
31
W/B
Control Value
20
20
20
1
32
32
20
20
20
31
31
31
15
7
20
8(AV/SV/DVD/480P)
1080i
31
31
31
20
20
20
10
Remark
variable
variable
fix
fix
variable
fix
variable
variable
variable
fix
CTI Level 1
CDL AXIS 2
LTI Level 0
0 ~ 3
0 ~ 3
0 ~ 3
1 (RF/AV/SV/DVD/480P/1080i)
2
1(RF/AV/SV/DVD/480P)
fix
fix
2
fix
Alignment and Adjustments
Samsung Electronics 4-7
4-2-6 VIDEO ADJUST 2
ITEM INITIAL DATA
ABL Mode 3
Gamma 2
DPIC Level 3
DC Trans 3
ABL TH 15
VM Level 2
VM Coring 0
VM f0 0
VM Limit 0
VM Delay 0
SHP CD 1
SHP f0 0
SHP f1 & P/O 11
Range
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 15
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 1
0 ~ 15
EEP-ROM Copy Data
RF 480P
3
1
3
1
15
2
0
2 (RF/AV/SV/DVD/480P)
0
0 (RF/AV/DVD)
1 (480P)
1
0
1 (AV/SV/DVD/Comp2)
13 1 (RF/AV/SVHS/DVD/Comp2)
1080i
1
Remark
fix
fix
fix
fix
fix
fix
fix
fix
fix
fix
AKB Time 13
Y/C Delay 30
PIP Y/C Delay 30
BAND PASS F 1
HIGH PASS F 3
0 ~ 31
0 ~ 31
0 ~ 31
0 ~ 7
0 ~ 7
16
30
30
1
3
Alignment and Adjustments
4-8 Samsung Electronics
4-2-7 VIDEO ADJUST 3
ITEM INITIAL DATA
VSU 2
Melody Volume 4
H Comp 0
V Comp 0
Pin Comp 0
AFC Comp 0
Sync Comp 0
NR Off Value 5
V-Mute(x100ns)
Range
0 ~ 15
0 ~ 20
0 ~ 15
0 ~ 15
0 ~ 15
0 ~ 7
0 ~ 1
0 ~ 9
8
0 ~ 10
EEP-ROM Copy Data
RF 480P
2
4
0
0
0
0
0
5
8
-
-
-
-
-
-
-
-
-
Remark
1080i
-
-
-
-
-
-
-
-
-
Alignment and Adjustments
Samsung Electronics 4-9
4-2-8 VIDEO ADJUST 4
ITEM INITIAL DATA
System RF 1
System_VSD_480P 1
System_1080i 1
Shp_Fo_VSD_480P 1
HPF_VSD 3
BPF_VSD 1
Chrm_bdwth_RF 28
Chrm_bdwth_Video 28
Chrm_bdwth_Svideo 30
Chrm_bdwth_DVD 28
IF_Comp_RF 2
IF_Comp_Video 4
IF_Comp_Svideo 5
Range
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 1
0 ~ 7
0 ~ 7
0 ~ 63
0 ~ 63
0 ~ 63
0 ~ 63
0 ~ 7
0 ~ 7
0 ~ 7
EEP-ROM Copy Data
RF 480P
2
1
1
3
1
3 (AVS/SV/DVD)
1 (AVS/SV/DVD)
28
28
30
28
2
4
5
1080i
2
Remark
fix
fix
fix
fix
fix
fix
fix
fix
fix
IF_Comp_DVD 4
VM_Delay_480P 1
0 ~ 7
0 ~ 3
4
1
fix
fix
Alignment and Adjustments
4-10 Samsung Electronics
4-2-9 OPTION
ITEM INITIAL DATA
CRT WIDE
PIP ON
3D-Comb Filter OFF
Blue Screen
BBE Effect
Auto power On
OFF
ON
ON
System CT
Virtual Dolby
ACS
Vchip (CT,CTA)
OFF
ON
ON
Vchop Area USA
Sub Woofer
No Sync Mute
X-Lay
OFF
ON
ON
Range Option
WIDE 4:3
ON OFF
ON OFF
ON OFF
ON OFF
ON OFF
CT (EN+SP+ER)CT-A(E+SP+F)
ON OFF
ON OFF
ON OFF
USA
ON OFF
ON OFF
ON OFF
Remark
WIDE
ON
OFF
OFF
ON
ON
CT
OFF
ON
ON
USA
OFF
ON
ON
AGC
Tubo Effect
Burst Screen
DW Multi
Letter Box
OFF
OFF OFF
Large
ON
ON OFF
ON OFF ON OFF
Large Double
ON OFF
OFF
OFF OFF
Large
ON
Alignment and Adjustments
Samsung Electronics 4-11
4-3 Screen Change (When adjusting I2C Bus Geometric items)
1 V SHIFT
2 V LINEARITY
3 H SIZE
6 V SIZE
7 V - S - CORRECTION
8
PIN PHASE
4
PIN AMP
5 V ANGLE
9 H SHIFT
10 V BOW
Alignment and Adjustments
4-12 Samsung Electronics
4-4 Other Adjustments
4-4-1 Screen Adjustment
1. Warm up the TV for at least 30 minutes.
2. Select the “ STANDARD” Video mode.
3. Turn to the Video Mode (No Signal) using a remote-control.
4. Connect an oscilloscope to RK,GK,BK.
5. Adjust the VR (VR501, VR531, VR561) screen so that RK, GK, BK pulse is 20Vp-p each. (Turn the R,G,B VR screen fully counterclockwise in the area of each flyback line.)
4-4-2 White Balance Adjustment
1. Select the “STANDARD” video mode.
2. Input 100% white pattern.
3. In the stand-by mode, press the remote-control keys in the following sequence:
4. Warm up the TV for at least 30 minutes.
5. Input a 10-step signal.
6. R-cut off, B-cut off, and G-cut off by pressing the Volume keys.
7. Adjust the low light with viewing the dark side of the screen.
8. Select R-drive, G-drive, and B-drive by pressing the Volume keys.
9. Adjust the high light with viewing the light side of the screen.
10. If necessary, redo adjustments 6~9.
11. Press the Menu key to exit.
4-4-3 Sub-Brightness Adjustment
1. Input a sub-brightness adjustment signal. (TOSHIBA PATTERN)
2. In the stand-by mode, press the remote-control keys in the following sequence :
3. Select SBT by pressing the Volume keys.
4. Adjust so that the 63 step on the right side of the screen is not seen (Use the Volume keys).
5. Press the Menu key to exit.
4-4-4 High Voltage (29KV) Check
PRECAUTION
1. Input a lion head pattern.
2. Select “STANDARD” video mode.
3. Warm up the TV for at least 10 minutes.
4. Use a 1000:1 probe.
ADJUSTMENT
1. Connect the (+) terminal of the 1000:1 probe to the high voltage distributor and the (-) terminal to GND (located on the deflection board).
2. Adjust RR471S (located on the deflection board) so that the digital meter indicates DC 29V ± 0.1V.
4-4-5 F.S. (Fail Safe) Adjustment
Note : The finished product has a well-mounted
VR (RR402S). If necessary, do the F.S. adjustments in the following sequence.
1. Use a digital multimeter.
2. Connect the digital multimeter to the JIG pin (DZ482S) terminals
3. Adjust VR (RR402S) so that the voltage becomes 2.25V.
4. After the adjustments are complete, be sure to mount VR (RR402S) correctly.
Alignment and Adjustments
Samsung Electronics 4-13
4-4-6 F.S. (Fail Safe) Circuit Check
Note : The F.S. Circuit check must be performed
after servicing.
1. Turn on the TV.
2. Select the “STANDARD” video mode.
3. Short F/S Test point (located on the SUB PCB). Then, both sound and picture disappear. (Note: Even if the shorted terminals are removed, both sound and picture do not appear. This proves the F.S. circuit is working. )
4. To restore both sound and picture, turn off the TV and reset it after about 30 seconds.
4-4-7 Static Focus Adjustment
PRECAUTION
1. Select the “STANDARD” video mode.
2. Input a crosshatch pattern.
3. Cover the lenses that are not being adjusted.
4. Connect a convergence jig and read data.
5. Adjust the lens for best focus. (See Fig, 4-1)
STATIC FOCUS (CONTINUED)
Vary the focus pack VR (Red, Blue) on the front cabinet. Adjust the TV for best possible focus around the center of the crosshatch pattern, without losing overall screen balance. Figure Crosshatch Pattern Examine these points together.
4-4-8 Lens Focus Adjustment
PRECAUTIONS
1. Do this adjustment after the static focus adjustment and the tilt adjustment.
2. Select the “STANDARD” video mode. (Contrast:100, Brightness:50)
3. Input a crosshatch pattern.
ADJUSTMENT
1. Loosen the lens screws.
2. Cover the two lenses that are not being adjusted.
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 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 color aberration (approximately 1~3 mm area) within a 3-block grid around the horizontal center-line. If the color aberration is irregular, adjust the lens as shown in the diagram below. (Accurate alignment of Green is important for overall color quality.)
6. Red lens adjustment Set the Red lens at the point where Orange becomes Crimson.
7. Blue lens adjustment Set the Blue lens at the point where Purple becomes Green.
P
L1
L2
RED ABERRATION
BLUE ABERRATION
L1, L2 < P
_
Fig. 4-1 Crosshatch Pattern.
Fig. 4-2 Color Aberration
Examine these points together
Alignment and Adjustments
4-14 Samsung Electronics
1. Select the “STANDARD” video mode.
2. Warm up the set at least for 10 minutes.
3. Enter the Convergence mode by pressing the remote control buttons in the following sequence :
4. Set the Beam Alignment Adjustment CY to Zero magnetic field area.
5. Check the squarewave at the point where the focus is misaligned (Use an audio oscillator).
6. Press the button on the remote control, and a vibrating dot-pattern appears.
7. Adjust the Focus-pack VR for defocusing.
8. Mute the other patterns (R/B) other than G-PATTERN. (Use / buttons on the remote control.)
9. Adjust the 2, 4 polarities of VM-COIL as shown in figure below.
10. Adjust the G-Focus until any light around the core disappears.
11. Adjust G-Focus so that the surrounding flash can disappear from the spot.
12. After G-Focus adjustments are complete, adjust R-Focus as above procedures.
13. The B-CRT adjustments can be omitted because the variance of beam focus is small. (Only Vm-coil is mounted.)
14. Adjust the Focus-pack VR for fine focusing.
15. Press the button on the remote control, and the mode changes to the Convergence Adjustment mode.
16. Press the button on the remote control to return to normal viewing.
4-5 Beam alignment Adjustments
(Creation of CPM Zero Magnet)
(Creation of the 2-pole/4-pole zero magnets)
G-FOCUS
(Varying G-Focus Pack)
G-FOCUS
(When VM 2-Pole Adjustment is completed)
CORE
CORE
Varying the 2-pole of VM
Varying the 4-pole of VM
(Positioning the Core in the Center)
(Adjust until the light around the core becomes a circle)
Alignment and Adjustments
Samsung Electronics 4-15
4-6 Hige Voltage Part
4-6-1 PWM REG Circuit
For the existing high voltage REG circuit (input voltage variation type), a dynamic REG response is not provided. So it is difficult for both beam linearity and uniformity in screen size to be maintained on the screen with rapidly changing beams.
A PWM (Pulse Width Modulation) type of high voltage, however, provides the maintenance of beam linearity and uniformity in screen size via a quick response to beam change by performing sync lock every 1H line, and detecting beam fluctuation at 1H line, and then controlling the IC current of high voltage output circuit.
1. High Voltage Fluctuation Detect (DC Detect)
FBT pin 11 detects DC high voltage fluctuation. The detected DC high voltage value is input to PWM IC471 pin1 through R473, VR471, R471, and then it is input to a differential AMP circuit that differentiates the gap after comparing with the reference voltage input to pin2.
2. High Voltage Fluctuation Detect (AC Detect)
To check AC high voltage fluctuation, the output from FBT is detected by using a capacitor inside the high voltage distributor. The detection of AC high voltage fluctuation, a detection of dynamic beam current change is required in order to keep beam linearity and uniformity in size. Regarding the capacitor, a capacity of less than 3000P should be applied to a PWM type. (The existing type needs a capacity of about 6000P.) AC detect circuit eliminates unnecessary high frequency by using C476, D472. Also, AC gain is limited to + / - 0.7V (D472). This AC gain is combined with the detection value of DC high voltage fluctuation by using C478.
3. PWM IC OSC Sync Lock
A PWM type IC needs sync lock for PWM pulse and horizontal scan line. The standard time constant of OSC circuit is determined by C487, R475 (PWM IC pins 5 and 6). And the standard OSC frequency is about 27 kHz . The horizontal frequency of scan line is
31.5kHz(NT), 3375kHz(DTV), 15.75kHz(Interface), so sync lock for this horizontal frequency should be performed using sync lock circuit. The sync lock circuit consists of Q481(Tr KSC815-Y), D479, D478, and C492. The input AFC signal is connected to PWM IC pin 5 through D479 so that it can be negative Trig.
4. Dead Time (HV Protect)
Dead Time (PWM IN pin4) consists of C481, delays high voltage for a certain time to soft start in power on, a x-ray protection circuit. The voltage of Dead Time is detected by FBT pin7 and through DC Feedback. The normal voltage of Dead Time is +27V. When high voltage increases, however, detected voltage is in proportion to high voltage. Then, the detected voltage is applied to ICR01S(TL431). If the voltage is over 2.5V (normal:about 2.25V), TL431 turns ON, the base port of QR401S becomes low, and then an emitter current flows. At this time, a high voltage protection point is set. When QR401S turns ON, high voltage is applied to PWM IC pin4 and then muted.
OSC : 27KHz
AFC Waveform : 31.5KHz(NT)
Locked OSC Waveform : 31.5KHz
Alignment and Adjustments
4-16 Samsung Electronics
5. Output Circuit
The voltages, which are detected form an error detection circuit of PWM IC (Differential AMP) and Dead Time, each is applied to PWM conparator . Due to these detection coltages, Q1, Q2 (Output TR) parallel operate. Q482 (External TR), however, functions as a buffer; natches inpedance between the output port of PWM IC and the final output TR(IRFS640). The PWM pulse (applied to the final output FET (IRFS640 GATE) varies the IC current of high voltage TR(Q473) by adjusting the load impedance of starage Trans (T431). Due to this variation of current, the gain for Q473 emitter pulse changes T444(FBT)makes this emitter pulse became high voltage. Such change keeps both dynamic and static changes fixed. The output waveform of high valtage TR emitter is as shown in the figure below.
6. Paraneters according to beam
To maintain the set high voltage value (31kV), parmaters such as +Ve (DC), Vcp High Voltage change (See the table below).
7. Response Waveform
To reduce unstable high voltage fluctuation, the existing high voltage type REG circuit controls dynamic fluctuation by using C-block capacitor. But, it can't detect actual dynamic fluctuation. Also, its velocity of response to static fluctuation is late because +B power supply changes per
about 1V. A PWM modulation type REG detects static, dynamic high voltage fluctuation for only Ton Time (when the current of the output TR collector flows) each 1H, and modulates the width of PWM pulse. So, this PWM type has better improvement in the characteristic of high voltage REG as compared to the existing type.
8. Application Effects
1) Improvement of horizontal size fluctuation
2) Linearity improved
3) Embodiment of X-ray protection circuit
The figures below show characteristics when a PWM high voltage REG circuit is applied.
Beam
(High voltage )
Factor of high
voltage change
Beam
(High voltage )
Width of FET
Gate Pulse
+ Ve (DC)
Vcp
High
Voltage
Parameters
High Voltage Drive Base Current
PWM Input Waveform of FET GATE
GND
GND
PWM Variation tange
Ton Toff
Beam
High Voltage
High Voltage OFF High Voltage REG ON
BLACK
WHITE
When a Toshiba Pattern is recrived, the screen is displayed as shown in figute side
Existing type
PWM type
Alignment and Adjustments
Samsung Electronics 4-17
4-7 Screen-Jig
4-7-1 HCM4215W/HCM422W/HCM4216W (NORMAL MODE)
4-7-2 HCM4215W/HCM422W/HCM4216W (DTV MODE)
42W5ScreenSize:X932,Y524(X:378=9*2+30*12,Y:440=28*2+64*6)
22.19mm 73.97mm
33.35mm
76.22mm
42W5 TV
33.35mm
22.19mm
42W5 DTV Mode : X 932, Y 524 (X:408=18*2+31*12, Y:488=40*2+68*6)
41.12mm 70.81mm
42.95mm
73.02mm
42W5 DTV
42.95mm
41.12mm
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