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KVP2021P05

Parker KVP2021P05 Service Manual

PARKER COLOR TV
KVP2021P05
south america
CONTENTS
1
1 safety instruction
1.1 X-RAY radiation precaution
1.1.1 Excessive voltage will cause harmful X-ray. To avoid this radiation hazard, the high voltage should fall within the limitation. The appliance works at AC 220V, 60Hz. The high voltage of zero beam current (brightness, contrast and color is min) should be within 27kV on condition that the main power (B+) voltage is AC220V. And it should not exceed 28kV in any condition. When servicing, please refer to the HIGH VOLTAGE CHECK procedure this service manual before check the high voltage and the high voltage meter should be reliable and accurat e. * Keep the main power voltage at 220V when checking the high voltage.
1.1.2 The primary source of X-RAY RADIATION is the CRT. The CRT of this TV set have gotten the approval of safety authenticat ion inspe ct ion. The rep lacement CR T sho ul d be exact ly the sa me ty pe and specification CRT which has gotten a similar safety approval, and check the high voltage according to the HIGH VOLTAGE CHECK procedure.
1.2 safety precaution a. Since the power supply circuit of this receiver is directly connected to the AC power line, an isolation transformer is necessary during dynamic service to avoid possible shock hazard. b. Alw ays discharge the graphite layer conductor when moving the CRT. c. Disconnect the power cord before replacing parts. d. When replacing high-power resistor, keep the resistor 10 mm away from the circuit board.
1.3 Component safety precaution Many electrical and mechanical parts in the chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection. Replacement parts which have these special safety characteristics are identified in this manual and its supplement electrical components having such features are shaded or marked by on the schematic diagram and the parts list. Before replacing any of these com ponents, read the parts list in this manual carefully. The use of substitute replacement parts which do not have the same characteristic as specified in the parts list may create shock, fire, X-RAY RADIATI O N or other hazards.
2.General instruction
2.1 Copy the standard model data to let EEPROM (N702 24C08)of the chassis have those data before placing it on the unit, do “factory adjustment” if necessary. If use a blank EEPROM directly, you should preset IIC data and then do other common adjustment. Refer to TABLE1 to preset EEPROM.
2.2 the adjustment should be done under following circumstances without additional instruction a) Alternat ing current 220V/ 60Hz b) Preheat at least 30 min
2.3The unit has auto degaussi ng circuit, the auto degauss ing proce ss can be finishe d within 2s when t he main power. Only when turn on the unit at least 20min after last time turn off TV does the auto degaussing circuit work.
2.4 If the CRT with magnet ism affects color purity and convergence, when the auto deg aussin g eraser. if the color purity and conv ergence are still not very good, then corresponding adjustment should be done. Refer to picture tube adjustment method for adjustment.
Note: This service manual is only for professional service personnel’s reference. Before
servicing the unit, please read the following items carefully.
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3 Alignment instruction
3.1 Debugging item a)adjust mode instruction b)B+ voltage adjustment c)RFAGC voltage adjustment d)focus adjustment e)Screen-grid voltage white balance, sub brightness adjust ment f)filed scan center, line , amplitude adjustment g)H-scan center adjustment
3.2 Alignment flow
Fig-1 alignment flow
E2PROM copy
B+ adjustment
RFAGC adjustment
Focus adjustment
Screen-grid voltage white
balance
Scan amplitude
center
check
The unit and remote control
AV, S terminal check
Color Purity, convergence check
White balance check
Sub brightness check
AV check
Filament voltage check
X-ray protect check
High voltage check
CCD function check
3
3.3 Enter/exit factory adjustment method
Use remote control, press “MENU” button, then press 6483, “M” will appear on screen to show that you have entered the factory adjustm ent method, press “STANDBY” to exit it. Use factory remote control, press the “PRESET” and “TEST” button, then the screen dis play “M” which me ans you have ent ered into the factory adjustment mode, press the “TEST” or “STANDBY” to exit.
3.4 select adjustment item and adjust data
After entering factory adjustment mode, press 1-4 number buttons to select menu 1- menu 4; to enter into MENU0, MENU5-MENU9, you may return to MENU1-MENU4 or just after you enter into “M” interface, quickly press “CHILD LOCK” button and then the number button (0,5-9) to enter into relative menus. Press “CH+” and “CH-” to select and “V+” and “V-”to adjust.
3.5 User purview
a). Factory adjustment mode menu1-menu4: only debugging worker, service checker, craftwork technician, designer may operate. b). Factory adjustment mode menu0, menu5-menu9: only craftwork technician, designer may operate.
4 Alignment methods
4.1 B+ voltage adjustment
a) Connect B+ point with a digital voltmeter to measure the negative pole of VD524 b) Receive PHILIPS test pattern signal and set the picture to standard. c) Adjust VR501 to let the value of B+ voltage be 110 V ±0.5 V (yongxin super pure flat)
4.2 AGC adjustment a) receive VHF-H band,60 dB RF signal. b) Select factory menu2 of “AGC”. c) Adjust AGC-TOP to let the picture just without noisy, then the voltage of tuner AGC is the
required value for adjustment.
d) exit factory menu
4.3 Normal temperature aging a) do not receive signals. b) under ”Test” condition, set the accelerator to an appropriate point for aging.
4.4 Accelerator adjustment a) do not receive signals; b) select “SC” of factory menu3 to let the field scanning stop working. c) adjust acceleration potentiometer to let bright lines just appears on screen. d) exit SC menu.
4.5 High voltage check
Note: the main power voltage (B+=110 V)can affect the high voltage directly, so be sure to let the B+ power voltage accurate. Under any state, the high voltage should not exceed 28 kV.
a) connect an accurate high voltage meter between the second anode cap of picture tube and
ground.
b) turn on TV and receive testing card signal. c) set picture to standard, the high voltage should be 25 kV± 0. 5 kV. d) the high voltage should not exceed 27KV with minimum brightness and contrast.
4.6 Focus adjustment a) receive A12-PHI L I PS (NTSC)signal
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b) adjust focus electrode potentiometer on FBT to optimize B area focus of screen.
4.7 White balance adjustment (color temperature 12000°K± 8MPCD,X=0.270± 0.008,Y=0.283± 0.008) a) receive full white signal, set color is 0 b) select factory menu3 c) on the basis of blue gun ”BD”, select and adjust “RD, GD” item to make white balance
respectively at brightness Y=6cd/m
2
, Y=80cd/m2 meet standard (color temperature 12000°K± 8MPCD,
x=0.270± 0.008, y=0.283± 0.008)
d)If at brightness Y=6cd/m
2,
white balance can not meet standard, you may adjust “RB, GB” item,
then repeat step C) until white balance meet standard.
4.8 Field scanning adjustment (fig-2) a) Receive PAL of D35-PHILIPS test pattern signal. b) select factory menu1 c) adjust V-SLO PE menu to let the horizontal center line of test pattern above blanking. d) select V-SHI FT menu and adjust to let the vertical center of picture coincide with vertical center of picture tube.
e) Select V-SIZE menu and adjust t o let the vertical reproduction ratio of picture acceptable 8%. f) Adjust V.SC to optimise the vertical S correction of picture.
Fig-2 field scan adjustment
4.9 Horizontal scanning adjustment (Fig-3)
a) Receive D35-PHILIPS(PAL) signal b) Select factory menu1 c) Select H.SHIFT menu and adjust to let the scanning horizontal center coincide with mechanical
center of picture tube
d) Exit factory menu
4.10 Sub-brightness adjustment
a) Receive A12-PHILIPS(NTSC) signal b) Select “SB” of factory menu3 c) Adjust “SB” to let things between the sixth and seventh grey scale clear
4.11 OSD adjustment
a) Receive D35-PHILIPS(PAL) signal b) Select OSD H and OSD V.POS of factory menu4. Adjust OSD H.POS and OSD V.POS to let O SD at
a
Horizontal line
Under part banking
Fig-3 line scan adjustment
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a specified place. c) Receive A12-PHILIPS(NTSC) signal d) Select OSD H and OSD V.POS of factory menu4. Adjust OSD H.POS and OSD V.POS to let O SD at
a specified place. e) Exit factory menu
4.12. Checking point
4.12.1 High voltage check
1) Connect High Voltage meter between CRT second anode and GND.
2) Receive A7 signal, set the control to “STANDARD”, measure the high voltage value, the reading should be 25 kV±0. 5 kV
3) Set the brightness and contrast to minimum (zero beam current), m easure the high voltage, the reading should not exceed 27kV.
4.12.2 CRT filament voltage check Receive A7 signal, set user control to “STANDARD” mode, use effective voltage meter to measure CRT filament voltage, the reading should be (6.3±0.3) Vrms
4.12.3 X-ray protection check
1) Receive A7 signal, set user control to “STANDARD” mode.
2) Use voltameter to measure VD482 positive pole to GND voltage, t he reading should be between 0.5
V~2.5 V.
3) Use 5.5V DC regulated voltage power with 1K resistor in series to touch TP1 (VD482 positive pole),
connect DC regulated voltage power negative pole to GND, X-Ray prot ect ion circuit should function,
at this time the TV set should be without raster, without sound. Disconnect the DC regulated voltage
power , pict ure and sound should rest ore t o normal.
4.12.4 Picture and sound check
1) Receive standard TV signal.
2) Use picture control buttons to check color, contrast, brightness, sharpness, tint’s function.
3) Use sound control buttons to check volume control function.
4.12.5 Sub-brightness check Receive A7 signal, set brightness to 75, contrast to 50, color to 0, sharpness to 50, picture left side 1-6 lattices slightly light up.
4.12.6 Color purity and convergence check (in normal way)
4.12.7 AV terminals IN/OUT check, S-VIDEO in check, Y,Cb,Cr in check.
4.12.8 Other buttons on the TV set and remote controller function check.
4.13 Degaussing a) The unit has and auto degauss ing c ircu it, the degaussing circuit works several seconds aft er t urning
on TV b) If you want to move TV or change the direction, turn off TV and ten minutes later the degaussing
circuit will work
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c) For better degaussing effect, you can use magnetic eraser d) Move the magnetic eraser clockwise before your TV, when it is 2m away from your TV, turn off the
magnetic eraser. If the effect is still not very good, you can adjust “color purit y” and “convergence”
4.14 Color purity correction a) Turn on your TV b) At least 15 minutes later, use anti-magnetized coil for degaussing c) Obtain maximum brightness and contrast d) Select factory menu3 and adjust to let R and B be zero, then let only green raster appear on the
screen at the moment e) Loosen screws of deflection yoke frame to let vertical green belt appear on screen only f) Move the rubber wedge g) Rotate along neck of picture tube and slide color-purity magnets until the green belt at the middle of
screen and is vertical at the same time h) Slowly move the deflectio n yoke bac kw ard of forwar d until the w hol e green ras ter appe ars on screen,
tighten the screws of the deflection yoke i) Check the color purity of red raster and blue raster j) Adjust white balance again to obtain white raster
4.15 Convergence correction
4.15.1 Central convergence correction a) Turn on your TV b) At least 15 minutes later, receive square test pattern signal c) Adjust brightness and contrast to get the best picture d) Adjust the angle of two tetrode magnetic rings to let the red vertical line coincide with the blue
vertical line at middle of screen e) Keep the angle unchanged, move t he t w o tetr ode magnetic rings at the same time to let the red and
blue horizontal lines coincide at middle of screen f) Adjust two hexode magnetic rings to let the green line coincide with the mixed line of red and blue.
Adjust the angle between them will affect the vertical line, move them together will affect the
horizontal line. g) Repeat d), e), f) and observe the movement of red, green and blue.
4.15.2 Ambient convergence correction a) Turn on your TV b) At least 15 minutes later, loosen the screws of the deflection yoke c) Fixate the rubber wedge temporarily under the deflection yoke d) Move the deflection yoke upw ard or downward to get best convergence, push the rubber w edge into
space between picture tube and deflection yoke to fixate the deflection yoke temporarily e) Place the rubber wedge whose overlay paper has been removed at t he bot t om space f) Move the deflection yoke left and right to get best convergence g) Keep the condition unchanged, place another rubber wedge whose overlay paper has been
removed also at the upper space at the same time h) Remove the interim rubber wedge, adhere it to picture tube and deflection yoke i) After placing three rubber wedges, check all the convergence again j) Stick three transparent viscous belts to the rubber wedge
4.16 Software adjustment instructions
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4.16.1 instructions This software contain MTS (option), English, Frence and Spanish of OSD, CCD and Parental Control function, FS tuner mode, 181 channel.
4.16.2 turn on the unit in the STANDBY state Press CH+/CH- buttons turn on in the STANDBY state.
4.16.3 Information of software version Enter MEU9 of the factory menu in the top.
4.16.4 “STANDARD”, “COLORFUL” and “ SOFTNESS” a).Enter MENU5 Mode of the factory menu b).charge their for seemly analog quantity, then return standard option.
4.16.5 Parental control mode switch a. Enter mode: press the “lock” button to menu, the pre-password is 0000 b. Exit mode: press the “ lock” button again. c. Adjustments mode: press the “P+”, “P-“ button to select the menu item, press the “V+”, “V-“ button to adjust the value.
Chart 1: I
2
C NOM8370-A-18A EEPROM pre-set data
MI Items Range Preset
M0 SUBCON 0-63 56-58(sub-contrast)
SUBCOL 0-63 56-58(sub-chroma) SUBSHP 0-63 42-48(sub-acutance) SUBTINT 0-63 31(sub-hue) AKB ON/OFF ON (black current detection)
M1 50Hz 60Hz
V.SLOPE 0-63 36(field center adjustment) 38 V.SHIFT 0-63 32(field point adjustment) 32 V.SIZE 0-63 36(field amplitude adjustment) 35 V.SC 0-63 32(field line) 32 HSHIFT 0-63 32(line point adjustment) 33 CHANNEL 35(channel) 12
M2 AGCTAKEOVER 0-63 21(AGC adjustment)
SHIPPING 0(leave factory set)
M3 BT 0-100 75(adjust white balance of brightness)
CT 0-100 75(adjust white balance of brightness contrast) SC 0 RB 0-63 32(red cut off level adjustment) GB 0-63 32(green cut off level adjustment) RD 0-63 32(red cut off level adjustment) GD 0-63 32(green cut off level adjustment) BD 0-63 32(blue cut off level adjustment)
8
SB 0-63 40(sub brightness adjustment)
M4 50Hz 60Hz
OSD.V.POSITION 0-63 15(OSD position) 18 OSD.H.POSITION 0-63 25(OSD H-position) 23 BTSC-AGC 0-15 1
M5 MODE ST ANADARD (standard, soft, floweriness)
BRIGHT 0-100 75
CONTRAST
0-100 75
COLOR 0-100 50 SC BRIGHT 0-63 23 YDELAYTV 0-15 12 YDELAYAV 0-15 12
M6 OSO 0-1 1(field over-scan switch)
AGCSPEED 0-3 1(AGC of speed) FFI 0-1 0(IF PLL SPEED) FMWS 0-1 1(frequency range of sound OFF=225KHZ,O N=45 0KH Z) RP0 0-3 0(pre-shock and over-shock scale) NTSCMATRIX USA/JAPAN USA VOLPIN 0-1 0(1:push-pull output; 0: OC gate output.) SOFT CLIP 0-3 3(white level limit) PEAK WHITE 0-15 15(peak white limit) CORING 0-1 0(coring noise reduction)
M7 AV2 0/1 1
SVHS 0/1 1 YUV 0/1 1 VOLADJPOING 1(volume value have: 1, 25, 50, 75) VOLVALUE 20(volume curve value: 20, 60, 75, 90)
M8 CATHOOELEVEL 0-15 6-7(cathode lev el)
FMATT 0-63 45-46(UOC sound output of amplitude) BTSC : 28
M9 NOM8370-A-18A
STARTON 0-2 0(turn on) LOGO ON/OFF OFF ON DELAY 0-15 8-10 (turn on time) ON DELAY M 5-15 5-8 (turn on time of factory) OFF-SET IF 0-63 32(IF compensate) TUNER OPTION 0-2 0(BXATB011F---X/ BXATB108F---K) 1 (BXATB017F---K)
2(XXX)
AV MEM ON/OFF OFF (turn on of the AV memory)
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Block diagram
A101 Z301 V801
V352 N121
AN702
Speaker
AN7522
TUNER
SAW
IF IN Y IN
RF AGC V IN
U IN CVBSINT CHROMA IFVO OUT CVBS/Y IN
SDA SCL
AUDIO OUT IK RGB OUT V OUT H OUT
S
TRAP
Vo V2i
V1i
Y
C
rCb
ARi2 ARi1
ALi2
ALi1
S-VHS
24C08
KA5Q0765
T501
POWER
UNIT
110V
26V 12V
8V 5V
3.3V
CRT
BOARD
V IN
STV9302A
V OUT
H IN
H OUT
TT2140
T451
H OUT
DY
180V +13.5
-13V
S
CREEN
F
OCU
S
OM8370
L
OUT1+ OUT1-
R
OUT2­OUT2+
CRT
ALo
ARo
C
Y
BU4052
BU4052
audio
audio
audio
video
video
bus
video
video
video
N801
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