SERVICE MONITOR SPECIAL MATERIALS FOR SMK AUDIO VIDEO
The characteristics of a good monitor:
Having the dot pitch size <= 0.24 mm Low radiation Having a resolution according to the class SVGA = 800 x 600 pixel XVGA = 1024 x 780 pixels UUGA => 2048 x 1024 pixel
BLOCK BLOCK MONITOR
I. POWER SUPPLY BLOCK
Power supply monitor system using SMPS (Switching Modulation Power Supply).
MAIN COMPONENTS
a.Rangkaian AC-Line
To negate EMF interference (Electrically Moment Frequency)
b.Diode Bridge
To convert AC into DC
Elco c.Kapasitor
To filter the voltage ripple
d.Resistor PTC (Positive Temperature coefficient)
To provide / produce current pulses for the coil de gaussing
e.Transistor Power Switching
To switch / electronic switch controlled pulse
f.Trafo AC-Matic / Auto Transformer
For stress distribution terswitching
PWM g.IC 3842
h.Diode output voltage
MONITOR ANY DAMAGES IN CONNECTION WITH POWER SUPPLY BLOCK
1.Tidak no DC voltage on the primary (off total)
Check fuse
Check the diode bridge
Check / replace IC 3842 PWM
Check / replace the transistor switching
Check the passive components around the IC PWM 3842 such as:
Capacitor Mylar (green)
Large-value resistor (¼ W,> = 500 K)
Solderan loose / broken lines
On / off switch broken
2.Power indicator off but normal DC voltage
Check the output voltage diode to block vertical, Horisantal, Video, Heater
Check / replace the transistor switching power
Check / replace IC 3842 PWM
Check the path to the Heater / Filament whether the relationship / not
Check / replace the transformer AC-Matic
3.Power indicator is blinking, and relle continuous on-off
Check diode output voltage to the horizontal block and heater / filament
Check the horizontal driver transistor or transistor horizontal
Check / replace IC 3842 PWM
Check transformer AC-Matic
4.Setiap in on it, always drop out fuse PLN
Replace components of PTC
Description:
Untu improvements should block off the first power supply voltage output diode diode to block Horizontal, Vertical, Video, Heater
CONCLUSION
When the monitor turns off completely, block power supply problem:
Check fuse
Check the diode bridge
Check the power transistor switching
Replace IC 3842 PWM
Check the AC transformer Matic
Check the components: capacitor mylar, Elco, resistors, at approximately 3842 PWM IC
VIDEO BLOCK
MAIN COMPONENTS
a.Konektor power
IC LM 1203 voltage (12 V)
Video transistor voltage (80-90 V)
Heater voltage (6.3 V)
Driver transistor voltage (20 V)
Ground point
b.Konektor signal
G1/Grid 1 (Brightness)
CLP (Climping)
H-synchronization
V-synchronization
Ground point
ABL point
c.Konektor video
1) R-Signal
2) R-return
3) G-Signal
4) G-Returns
5) B-Signal
6) B-Return
7) Ground
8) H-Signal
9) Digital tests
10) V-Signal
Matrix d.IC color / Chroma
Type LM 1203 for a color monitor, and LM 1202 to monitor paper, white / colorless
CRT e.Socket
1) Focus/G3
4) Brigtness/G1
5) Cathode Green / KG
6) Screen/G2
7) Cathode Red / KR
8) Heater (+)
9) Heater (-) / ground
10) Cathode Blue / KB
2,3,11,12 No connect / NC
f. Transistor Video Amplifier
There are 3 pieces with the same type
g. Driver Transistor
R-Driver
G-Driver
B-Driver
h. Tripot regulator colors
R-Bias R-Drive
G-Bias G-Drive
B-Bias B-Drive
i. Inductor (L) and resistor (R) Video Filter
BLOCK ANY DAMAGE VIDEO
1. Color cursor display problems / letters
a) The characters tend to yellow
◘ Signal disturbed blue
Check the video cable channel pin 5
Check pin 16 (IC LM 1203) is voltage 2.1 VDC (normal)
Check the video amplifier transistor blue
Check CRT tube number 10 pin
b) The characters tend to be colored purple / pink
◘ green signal disturbed
Check the video cable channel pin (3)
Check pin (20) IC LM 1203 voltage is 2.1 VDC (normal)
Check the video amplifier transistor green color
c) The characters tend to be colored ciyan
◘ Signal red wana disturbed
Check the video cable channel pin (1)
Check pin (25) IC LM 12 103 no output voltage 2.1 VDC (normal)
Check the video amplifier transistor red
2. There raster bright white screen but the character / image does not appear
☺ Replace LM IC 1203 / IC Video
3. No adatampilan, but there are raster when the monitor is turned off (visible flashes of light)
☺ Replace IC LM 1203/IC Video
CRT BLOCK (Catoda ray Tube)
a) Pin-pin / tube legs
1 = Focus / G3
4 = Brightness / G1
5 = Cathode Green / KG
6 = Screen / G2
7 = Cathode Red / KR
8 = Heater / Filament (-) / H +
9 = Cathode Blue / KB
11 = No Connect (NC)
b) Color Purity Magnets
To unify / color purify file / emission of electrons emitted by the cathode R, G, and B
c) Horizontal and Vertical Deflection Coils
☺ Koil part in = Horizontal
cable (+) red and (-) blue
Serves to deflect the emission cathode ray to the horizontal direction
☺ coil outer = Vertical
Yellow wire (+) and brown wire (-)
Serves to deflect the emission cathode rays in the direction vertical
d) Coils De Gaussing
To neutralize the color of yag incidence of undesirable effects, due to the magnetic field / electron is trapped.
Located at the front of the tube around the tube
Description: De Gaussing signal generated by the output of the PTC component of the power supply block
e) Knob anode
☺ to attract berkas-berkas/emisi cathode ray R, G and B
This knob ☺ given AC voltage between 23 kV - 29.9 kV
f) Phosphorus Aluminum Layers
☺ when exposed to light / beam / electron emission will glow (glow)
☺ is on the surface of the inner tube
☺ the softer the better (smaller dot pitch)
ANY DAMAGES IN CONNECTION WITH CRT MONITOR
1. Image not focus / double, although it is set with the focus on the FBT
☺ Set-set color purity magnet again by:
shear-slide it part of the ring, slide forward / backward to get the best picture.
2. The top right of the screen appears black tube is less luminous
☺ horizontal deflection coil damaged
☼ solution: replace the deflection coil
3. When the horizontal deflection coil end looks symptoms:
☺ looked bright white vertical line
4. When the cathode R, G and B damaged / emissions discharged (applicable to tubes that have been worn / old / worn out) then there will be interference:
☺ damaged cathode B = characters tend to yellow
☺ cathode damaged G = characters tend to purple / pink
☺ damaged cathode R = characters tend ciyan
5. There are black spots on the screen that can not be lost
Aluminum ☺ phosphor coating the inner surface of the tube on fire for being too excessive in regulating the screen.
☺ When the screen is too bright, though the contrast is minimal, atue with the screen at FBT
6. Show / visible color effects that occur at the ends of the corner of the screen
☺ Koil de Gaussing not working
☼ CHANGE PTC component and resistor 200 ohm / 2 watt is parallel with the PTC
7. When found the lamp heater / filament does not glow so that the display monitor is dark / no picture appears
☼ Check the pins on the tube heater, must be disconnected (normal), if it does not mean breaking
☼ Check input voltage (6.3 V) that enter the pin heater / filament
HORIZONTAL BLOCK
Horizontal output used to drive / control:
a) The horizontal deflection coil
b) Fly-Back Transformer (FBT)
MAIN COMPONENTS
a) Transistor amplifier shift
to keep the screen does not tend to gravitate toward the left
b) amplifier IC Buffers
Type LM 1391 / ap-amp (SPC)
Pin 1 and pin output = input = 3
c) Tri-pot Potensio
☼ H - Line
☼ H-Center
☼ H-Hold
d) Transformer Driver Couple and transistor Horizontal
e) The transistor amplifier horizontal
☼ DC working voltage = ± 90 V at the collector point
☼ The voltage signal form the box / block
☼ How to check:
Use the multimeter scale ☺ VAC-1000
☺ red plug on the output and the black plug on the com
f) Fly-Back Transformer
to mernghasilkan:
☼ high voltage anode (+23-29,9 kVAC)
☼ screen voltage (+ 600 VAC)
☼ focus voltage (- 800 VAC)
MONITOR ANY DAMAGES RELATED TO BLOCK HORIZONTAL
1. Monitor can not focus
☼ Set focus button on the FBT in flame condition
☼ If you can not focus anymore, regulators focus in damaged condition, need to be grafted with grafting flyback transformer
2. Monitor can not be dimmed, so that it looks too bright, although the regulator Brightness and contrast is minimal.
☼ Set screen button on the FBT
☼ If you can not dim anymore, grafts with a transformer FBT
Description:
To monitor a double focus, in addition to regulate gocus, if there is image blur / lack of focus, adjust the color purity magnet also
3. No view, but the LED indicator ON
☼ check the video signal (VGA card, video cable)
☼ check the horizontal transistor
Buffer IC damaged ☼
☼ check heater / filament, if the flame
4. Views narrowed horizontally
☼ supply voltage to the transistor horizontal less, check voltage diode output to the horizontal block / to colector
☼ check the horizontal driver transistor
☼ charred horizontal deflection coil
5. The right side of the left monitor is disturbed the running wave
☼ check / search for Elco capacitor in the horizontal block in the horizontal transistor, driver transistor, IC Buffer
6. H-Size Manager button does not work
☼ check VR (variable resistor) control the H-Size
☼ check transistor associated with the VR regulators H-Size
☺ Description:
when all the key regulator and LED indicator does not work:
☼ replace the processor IC processing control buttons (especially for digital monitors)
VERTICAL BLOCK
Function:
To continue and strengthen the vertical signal coming from block sincronisasi + vertical oscillator
Then its output to control / adjust the vertical deflection coil for said: electrons move / deviate vertically
MAIN COMPONENTS
1. Vertical Driver Transistor
Part collector is connected to output pin Vertical IC TDA1175 (SPC) with DC voltage = 3.5
2. Vertical Amplifier IC
Type-type that is often used:
Pin 4 is the output voltage has a sawtooth (saw tooth) at 23 VAC
3. Keys manager of the variable resistor
VR-Size
VR-Shift
Key regulator of the variable Tri-Pot
V-Center
V-Line
V-Hold
Having the dot pitch size <= 0.24 mm Low radiation Having a resolution according to the class SVGA = 800 x 600 pixel XVGA = 1024 x 780 pixels UUGA => 2048 x 1024 pixel
BLOCK BLOCK MONITOR
I. POWER SUPPLY BLOCK
Power supply monitor system using SMPS (Switching Modulation Power Supply).
MAIN COMPONENTS
a.Rangkaian AC-Line
To negate EMF interference (Electrically Moment Frequency)
b.Diode Bridge
To convert AC into DC
Elco c.Kapasitor
To filter the voltage ripple
d.Resistor PTC (Positive Temperature coefficient)
To provide / produce current pulses for the coil de gaussing
e.Transistor Power Switching
To switch / electronic switch controlled pulse
f.Trafo AC-Matic / Auto Transformer
For stress distribution terswitching
PWM g.IC 3842
h.Diode output voltage
MONITOR ANY DAMAGES IN CONNECTION WITH POWER SUPPLY BLOCK
1.Tidak no DC voltage on the primary (off total)
Check fuse
Check the diode bridge
Check / replace IC 3842 PWM
Check / replace the transistor switching
Check the passive components around the IC PWM 3842 such as:
Capacitor Mylar (green)
Large-value resistor (¼ W,> = 500 K)
Solderan loose / broken lines
On / off switch broken
2.Power indicator off but normal DC voltage
Check the output voltage diode to block vertical, Horisantal, Video, Heater
Check / replace the transistor switching power
Check / replace IC 3842 PWM
Check the path to the Heater / Filament whether the relationship / not
Check / replace the transformer AC-Matic
3.Power indicator is blinking, and relle continuous on-off
Check diode output voltage to the horizontal block and heater / filament
Check the horizontal driver transistor or transistor horizontal
Check / replace IC 3842 PWM
Check transformer AC-Matic
4.Setiap in on it, always drop out fuse PLN
Replace components of PTC
Description:
Untu improvements should block off the first power supply voltage output diode diode to block Horizontal, Vertical, Video, Heater
CONCLUSION
When the monitor turns off completely, block power supply problem:
Check fuse
Check the diode bridge
Check the power transistor switching
Replace IC 3842 PWM
Check the AC transformer Matic
Check the components: capacitor mylar, Elco, resistors, at approximately 3842 PWM IC
VIDEO BLOCK
MAIN COMPONENTS
a.Konektor power
IC LM 1203 voltage (12 V)
Video transistor voltage (80-90 V)
Heater voltage (6.3 V)
Driver transistor voltage (20 V)
Ground point
b.Konektor signal
G1/Grid 1 (Brightness)
CLP (Climping)
H-synchronization
V-synchronization
Ground point
ABL point
c.Konektor video
1) R-Signal
2) R-return
3) G-Signal
4) G-Returns
5) B-Signal
6) B-Return
7) Ground
8) H-Signal
9) Digital tests
10) V-Signal
Matrix d.IC color / Chroma
Type LM 1203 for a color monitor, and LM 1202 to monitor paper, white / colorless
CRT e.Socket
1) Focus/G3
4) Brigtness/G1
5) Cathode Green / KG
6) Screen/G2
7) Cathode Red / KR
8) Heater (+)
9) Heater (-) / ground
10) Cathode Blue / KB
2,3,11,12 No connect / NC
f. Transistor Video Amplifier
There are 3 pieces with the same type
g. Driver Transistor
R-Driver
G-Driver
B-Driver
h. Tripot regulator colors
R-Bias R-Drive
G-Bias G-Drive
B-Bias B-Drive
i. Inductor (L) and resistor (R) Video Filter
BLOCK ANY DAMAGE VIDEO
1. Color cursor display problems / letters
a) The characters tend to yellow
◘ Signal disturbed blue
Check the video cable channel pin 5
Check pin 16 (IC LM 1203) is voltage 2.1 VDC (normal)
Check the video amplifier transistor blue
Check CRT tube number 10 pin
b) The characters tend to be colored purple / pink
◘ green signal disturbed
Check the video cable channel pin (3)
Check pin (20) IC LM 1203 voltage is 2.1 VDC (normal)
Check the video amplifier transistor green color
c) The characters tend to be colored ciyan
◘ Signal red wana disturbed
Check the video cable channel pin (1)
Check pin (25) IC LM 12 103 no output voltage 2.1 VDC (normal)
Check the video amplifier transistor red
2. There raster bright white screen but the character / image does not appear
☺ Replace LM IC 1203 / IC Video
3. No adatampilan, but there are raster when the monitor is turned off (visible flashes of light)
☺ Replace IC LM 1203/IC Video
CRT BLOCK (Catoda ray Tube)
a) Pin-pin / tube legs
1 = Focus / G3
4 = Brightness / G1
5 = Cathode Green / KG
6 = Screen / G2
7 = Cathode Red / KR
8 = Heater / Filament (-) / H +
9 = Cathode Blue / KB
11 = No Connect (NC)
b) Color Purity Magnets
To unify / color purify file / emission of electrons emitted by the cathode R, G, and B
c) Horizontal and Vertical Deflection Coils
☺ Koil part in = Horizontal
cable (+) red and (-) blue
Serves to deflect the emission cathode ray to the horizontal direction
☺ coil outer = Vertical
Yellow wire (+) and brown wire (-)
Serves to deflect the emission cathode rays in the direction vertical
d) Coils De Gaussing
To neutralize the color of yag incidence of undesirable effects, due to the magnetic field / electron is trapped.
Located at the front of the tube around the tube
Description: De Gaussing signal generated by the output of the PTC component of the power supply block
e) Knob anode
☺ to attract berkas-berkas/emisi cathode ray R, G and B
This knob ☺ given AC voltage between 23 kV - 29.9 kV
f) Phosphorus Aluminum Layers
☺ when exposed to light / beam / electron emission will glow (glow)
☺ is on the surface of the inner tube
☺ the softer the better (smaller dot pitch)
ANY DAMAGES IN CONNECTION WITH CRT MONITOR
1. Image not focus / double, although it is set with the focus on the FBT
☺ Set-set color purity magnet again by:
shear-slide it part of the ring, slide forward / backward to get the best picture.
2. The top right of the screen appears black tube is less luminous
☺ horizontal deflection coil damaged
☼ solution: replace the deflection coil
3. When the horizontal deflection coil end looks symptoms:
☺ looked bright white vertical line
4. When the cathode R, G and B damaged / emissions discharged (applicable to tubes that have been worn / old / worn out) then there will be interference:
☺ damaged cathode B = characters tend to yellow
☺ cathode damaged G = characters tend to purple / pink
☺ damaged cathode R = characters tend ciyan
5. There are black spots on the screen that can not be lost
Aluminum ☺ phosphor coating the inner surface of the tube on fire for being too excessive in regulating the screen.
☺ When the screen is too bright, though the contrast is minimal, atue with the screen at FBT
6. Show / visible color effects that occur at the ends of the corner of the screen
☺ Koil de Gaussing not working
☼ CHANGE PTC component and resistor 200 ohm / 2 watt is parallel with the PTC
7. When found the lamp heater / filament does not glow so that the display monitor is dark / no picture appears
☼ Check the pins on the tube heater, must be disconnected (normal), if it does not mean breaking
☼ Check input voltage (6.3 V) that enter the pin heater / filament
HORIZONTAL BLOCK
Horizontal output used to drive / control:
a) The horizontal deflection coil
b) Fly-Back Transformer (FBT)
MAIN COMPONENTS
a) Transistor amplifier shift
to keep the screen does not tend to gravitate toward the left
b) amplifier IC Buffers
Type LM 1391 / ap-amp (SPC)
Pin 1 and pin output = input = 3
c) Tri-pot Potensio
☼ H - Line
☼ H-Center
☼ H-Hold
d) Transformer Driver Couple and transistor Horizontal
e) The transistor amplifier horizontal
☼ DC working voltage = ± 90 V at the collector point
☼ The voltage signal form the box / block
☼ How to check:
Use the multimeter scale ☺ VAC-1000
☺ red plug on the output and the black plug on the com
f) Fly-Back Transformer
to mernghasilkan:
☼ high voltage anode (+23-29,9 kVAC)
☼ screen voltage (+ 600 VAC)
☼ focus voltage (- 800 VAC)
MONITOR ANY DAMAGES RELATED TO BLOCK HORIZONTAL
1. Monitor can not focus
☼ Set focus button on the FBT in flame condition
☼ If you can not focus anymore, regulators focus in damaged condition, need to be grafted with grafting flyback transformer
2. Monitor can not be dimmed, so that it looks too bright, although the regulator Brightness and contrast is minimal.
☼ Set screen button on the FBT
☼ If you can not dim anymore, grafts with a transformer FBT
Description:
To monitor a double focus, in addition to regulate gocus, if there is image blur / lack of focus, adjust the color purity magnet also
3. No view, but the LED indicator ON
☼ check the video signal (VGA card, video cable)
☼ check the horizontal transistor
Buffer IC damaged ☼
☼ check heater / filament, if the flame
4. Views narrowed horizontally
☼ supply voltage to the transistor horizontal less, check voltage diode output to the horizontal block / to colector
☼ check the horizontal driver transistor
☼ charred horizontal deflection coil
5. The right side of the left monitor is disturbed the running wave
☼ check / search for Elco capacitor in the horizontal block in the horizontal transistor, driver transistor, IC Buffer
6. H-Size Manager button does not work
☼ check VR (variable resistor) control the H-Size
☼ check transistor associated with the VR regulators H-Size
☺ Description:
when all the key regulator and LED indicator does not work:
☼ replace the processor IC processing control buttons (especially for digital monitors)
VERTICAL BLOCK
Function:
To continue and strengthen the vertical signal coming from block sincronisasi + vertical oscillator
Then its output to control / adjust the vertical deflection coil for said: electrons move / deviate vertically
MAIN COMPONENTS
1. Vertical Driver Transistor
Part collector is connected to output pin Vertical IC TDA1175 (SPC) with DC voltage = 3.5
2. Vertical Amplifier IC
Type-type that is often used:
Pin 4 is the output voltage has a sawtooth (saw tooth) at 23 VAC
3. Keys manager of the variable resistor
VR-Size
VR-Shift
Key regulator of the variable Tri-Pot
V-Center
V-Line
V-Hold
Komentar