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UOC TDA9341(9351)-2NAG SERIES PCBCY-2529PD VER 1.0
SERVICE MANUAL
COLOUR TELEVISION
.
CONTENTS 1. safety precautions...................................................................................................3 2. block diagram and PHILIPS UOC functional difference between the various IC versions ......................4 3 Replacement of memory IC.......................................................................................7 4 Service adjustment...................................................................................................7 5 ICs functional description..........................................................................................11 6 Test point waveform.................................................................................................15 7 All ICs/transistors voltages........................................................................................16 8 Purity / convergence adjustment................................................................................17
2
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SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards Don't short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE: ( ) side GND, ISOLATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don't short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY). The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k 2W resitor to the anode button. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components. 10. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. 11. The surface of the TV screen is coated with a thin film which can easily be damaged. Be very careful with it when handle the TV. Should the TV screen become soiled, wipe it with a soft dry cloth. Never rub it forcefully. Never use any cleaner or detergent on it. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (...Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a periode of one second.) This method of test requires a test equipment not generally found in the service trade. Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.). Alternate Check Method Plug the AC line cord directly into the AC outlet ( do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.)
2.
3.
(2)
4.
5.
6.
7.
8.
9.
3
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2 TV Block diagram
TDA93XX
TUNER
SAW
IF IN RF AGC
R IN GIN B IN
video
Vo R G B C video
S TRAP
video
CVBSINT CHROMA IFVO OUT CVBS/Y IN video 4052
V1i Y ARo ALo
24C08 audio bus SDA SCL A OUTR A OUTL MAIN L MAIN R SDA/SCL AV2 R AV2 R M OUTR M OUTL AV1 L AV2 L AUDIO OUT V OUT IK RGB OUT H OUT
ARi2 ARi1 TDA9859 audio
video V2i ALi2 ALi1
audio AN17821 Vi1 OUT1OUT1+ Vi2 OUT2OUT2+
130V 24V POWER UNIT 16V 8V 5V 3.3V
V IN TDA8177 V OUT
H IN H OUT H OUT
200V +15V
CRT PCB
audio CRT
-15V SCREEN FOCUS
DY
4
.
PHILIPS UOC FUNCTIONAL DIFFERENCE BETWEEN THE VARIOUS IC VERSIONS
IC VERSION TV rang Mono inter-carrier multi-standard Sound demodulator (4.5-6.5MHz) With switch able centre frequency Audio switch Automatic volume leveling Automatic volume leveling or Subcarrier output (for comb filter applications) QSS sound IF amplifier with Separate input and AGC circuit AM sound demodulator without Extra reference circuit PAL decoder SECAM decoder NTSC decoder Horizontal geometry(E-W) Horizontal and vertical zoom ROM size 9350 9351 9352 9353 9360 9361 9362 9363 9364 9365 9366 9367 9380 9341 9382 9383 9384 9385 9386 9387 9388 9389 9370 9373 9375 9377 9378
90
90
90
110 90
90
110
110
110
110
90
90
90
90
90
110
110
110
110
90
110
110
90
110
110
90
110
64128 2k
64128 2k
64128 2k
1664k 1k
1664k 1k
1664k 1k
1664k 1k
3255k
321k 1p
321k 1p
321k 1p
321k 1p
642k
642k
642k
642k
642k
161k
161k
161k
161k
161k
161k
32-
32-
32-
32-
64k 64k 64k 64k 128 128 128
User RAM size Teletext Closed captioning
128 128 64k 64k 64k 64k
64k 64k
55k 55k
55k 55k
2.25 2.25 2.25 2.25 2.25
10p 10p 10p 10p 10p 10p 10p 10p
Block diagram TDA93xX PS/N2 series with mono intercarrier sound demodulator
5
.
6
3.REPLACEMENT OF MEMORY IC
1. MEMORY IC.
This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from AC outlet. (2) Replace IC Be sure to use memory IC written with the initial data values. (3) Power On Plug the power cord into the AC outlet and switch the power On. (4) Check and set SYSTEM default value: 1) Press "QV" key holding about 4 second and then press "MENU1" key on the Remote control unit. Or Press "TEST" key on the Remote control unit for factory used. 2) The "TEST" will be displayed on the screen. 3) Press digital key, (Mkey) and corresponding on-screen display will be appeared. Some time "PASSWORD" on-screen display will be appeared, you need to input 828. 4) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by [VOL+]/[VOL-] keys. 5) Press "STANDBY" key again and return to the normal screen.
4.SERVICE ADJUSTMENT
B1 POWER SUPPLY
1. Receive normal colour bar signal. 2. Connect DC voltmeter to VD541- and isolated ground. 3. Adjust potentiometer in power unit to get the voltage as 110V ±1.0V for 21 inch hereinafter, 130 ±1.0V for 25 inch upwards.
FOCUS ADJUSTMENT
1. Receive a crosshatch signal. 2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible.
7
BUS CONTROL ADJUSTMENT
To enter BUS control mode, Press "TEST" key on the Remote control unit of factory. Press "0" to "4" key, lock key +"5" to "9" (Mkey) and corresponding on-screen display will be appeared. On TV screen "TEST" will be indicated, this means entered bus control mode. And press following key, each function will be available.
Remote Hand Unit keys
[M1] [M2] [M3]
Horizontal line
[M0]
Shado
[M1] menu MENU0 Geometrical adjustment Receive PAL standard Complete pattern signal. Adjustment steps a) Adjust V. SLOPE, to the center horizontal line just appeare from half bottom shadow. b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT. c) Adjust V. SHIFT, the center horizontal line correspond to CRT vertical center. d) Adjust H.SHIFT, to get the picture horizontal center correspond to CRT horizontal center. Receive NTSC signal and repeat above [M0] and [M1] adjustment. [M2] Menu AGC Adjustment. Receive 60dB(1mV)VH colour bar pattern signaladjust AGC valuevoltage from high to lowto noise reduce gradually and just disappeared point. [M3] Menu CRTcut off and white balance adjustment. Receive white signal. a) CRT cut off adjustment. 1. Select "SC", then automatically vertical scan will be stopped. 2. Adjust SCREEN control on Flyback transformer to get the darkest single horizontal line (red, green, or blue, sometimes shows more yellow, more purple or more white). b) White balance adjustment. 1. Select RD/BD menu. 2. Adjust RD/BD to get colour temperature as x=281, y=311 c) Sub-Brightness adjustment. (Use stair case signal) 1. Select SB menu. 2. Adjust SB to get the darkest step being cutoff. a
8
I2C standard UOC for export bus control adjustment item default setting
MI M0 Items SUB CONTRAST SUB COLOUR SUB SHARPNESS SUB TINT BASE TINT VOL POINT VOL VALUE M1 V. SLOPE V. SHIFT V. SIZE V. SC H. SHIFT PROGRAM NO. M2 AGC SEARCH SPEED SHIPPING M3 BT CT SC RB GB RD GD BD SB M4 OSD V.POS OSD H.POS OSD GR M5 CATHODE PP mode Brightness Contrast Color Sharpness Sc brightness 0~100 0~100 0~100 0~100 0~63 0~63 0~63 0~63 0~63 0~63 0~63 0~28 0~63 0~15 0~15 0~100 0~100 brightness contrast Screen line R bais adjusted G bais adjusted R drive adjusted G drive adjusted B drive adjusted Sub brightness Vertical position of OSD Horizital position of OSD OSD brightness CATHODE voltage adjust Variable 63 63 63 63 63 1/25/50/75 0~99 35 20 25 18 15 0 0~63 0~3 AGC take over Search speed Preset Sub contrast Sub colour Sub sharpness Sub tint BASE TINT The1~4th point of S - curve The volue of VALUE Picture vertical center adjustment Vertical positions adjustment Vertical amplitude adjustment Vertical s-correction adjustment Horizontal position adjustment
2006-10-12
recommendation 63 63 63 32 32 20/40/60/80
26 0
50 75 32 32 32 32 32 45 15 40
2
4 standard 50 75 50 75 45
PP mode select( standard / dynamic / mild/PIC WB) Brightness in pp mode Contrast in pp mode Color in pp mode Sharpness in pp mode Brightness of screen line 9
YD PAL YD NTSC YD SECAM YD AV PAL RGB HS+ M6 OSO AGC SPEED FFI FSL FMWS RPO NTSC Matrix Vol pin UOC VOL FM ATT SOFT CLIP
0~15 0~15 0~15 0~15 0~15 0/1 0~3 0/1 0/1 0/1 0/3 USA 0~! 0~1 0~63 0~3 0~15 0~3
Y-delay adjustment for PAL signal Y-delay adjustment for NTSC signal Y-delay adjustment for SECAM signal Y-delay adjustment for PAL signal in AV mode RBG hor. offset Switch off in vertical over scan AGC speed Fast filter IF -PLL Forced slicing level for vertical sync Widow selection of narrow-band sound PLL Ratio pre_overshoot NTSC matrix selection VOL PIN selection (Open drain) The volume control of internal UOC Fm att gain Soft clip adjust Peak white adjust
8 8 8 8 8 1 3 0 0 0 2 1 0 0 45 2 4 1 38.9 ON ON ON OFF B/G ON ON ON ON OFF RGB CVBS ON ON ON ON ON ON ON ON ON
PEAK WHITE CORING
M7 IF D/K I B/G M SIF PRI AUTO SOUND A V2 SVHS EURO YUV PIN 5 VIDEO OUT M8
Coring adjust
Vision IF of RF (38/38.9/45.75058.75)
ON/OFF ON/OFF ON/OFF ON/OFF B/G/DK/I/M ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF 4.5M/RGB CVBS/IF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF
Sound system(6.5MHZ) Sound system(6.0MHZ) Sound system(5.5MHZ) Sound system(4.5MHZ) Force sound system as auto search Auto sound system as auto search AV2 selection SVHS seletion Scart input seletio YUV seletion Function selection(NTSC/RGB) Selected video out (pin38) OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection 10
FRENCH RUSSIAN
TURKISH FARSI ARABIC BULGARIAN RUMANIAN SPANISH PORTUGUESE
ITALIAN KEY BOARD GERMAN DUTH SWEDISH NORWEGIAN HUNGARIAN POLISH CZECH SLOVENE CROATIAN MACEDONIAN SERBIAN GREEK M9 LOGO AV MEM 16:9 MODE GAME
ON/OFF 0/1 ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF 0/1 0~15 5~15
OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection OSD language selection Logo selection 16:9 selection GAME selection CALENDAR selection AC power on start selection On delay time
ON 1 ON ON ON ON ON ON ON ON ON ON ON ON OFF ON ON ON
CALENDAR START ON ON DELAY ON DELAY M
ON 0 0 5
Factory On delay time
KEY BOARD: multiple-choice test(0/1)
0: Control keys input (Max. Limit voltage) Function Voltage POWER 0 MENU 0.4125 TV/AV 0.825 V1.2375 V+ 1.65 P2.0625 P+ 2.475
1: Control keys input (Max. Limit voltage) Function Voltage POWER MENU 2.2 TV/AV 1.75 V0.85 V+ 1.3 P0.4 P+ 0.0
11
5. ICs functional description
UOC TDA93XX SYMBOL STAND BY output. SCL SDA TUNING P3.0/NTSC SW KEY VOL MUTE VSSC/P BAND1 BAND2 VSSA SECPLL VP2 DECDIG PH2LF PH1LF GND3 DECBG AVL/EWD VDRB VDRA IFIN1 IFIN2 IREF VSC TUNER AGC AUDEEM/SIFIN1 *1 DECSDEM/SIFIN2 GND2 SNDPLL/SIFAGC *1 AVL/SNDIF/REF0/ AMOUT *1 HOUT FBISO PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 DESCRIPTION In STAND BY mode, high level (Power OFF). For Power ON this pin will be reduced to low. I2C-bus clock line I2C-bus data line tuning Voltage (Vt) PWM output Port 3.0 or NTSC output/SCART SW input, Forced NTSC selection, Low-level output, otherwise High output. Control keys input *3 Sound Volume control PWM output Sound mute output Digit ground for -controller core and periphery Tuner Band selection output Tuner Band selection output Analog ground of teletext decoder and digital ground of TV-processor SECAM PLL decoupling 2nd supply voltage TV-processor(+8V) decoupling digital supply of TV-processor Phase-2 filter Phase-1 filter Ground 3 for TV-processor Band gap decoupling Automatic volume leveling /EAST-WEST drive output Vertical drive B output Vertical drive A output IF input 1 IF input 2 Reference current input Vertical sawtooth capacitor Tuner AGC output Audio deemphasis or SIF input
decoupling sound demodulator or SIF input 2 ground 2 for TV processor narrow band PLL filter or AGC sound IF Automatic Volume Levelling / sound IF input / subcarrier reference output / audio deemphasis horizontal output flyback input/sandcastle output
12
AUDEXT/QSSO/ AMOUT *1 EHTO PLL IF IFVO/SVO VP1 CVBS INT GND1 CVBS/Y CHROMA
AUDOUT/AMOUT *1
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
external audio output / QSS intercarrier out EHT/overvoltage protection input IF-PLL loop filter IF video output / selected CVBS output supply voltage TV processor internal CVBS input ground for TV processor CVBS/Y input C input audio output /AM audio output (volume controlled) 2nd RGB / YUV insertion input 2nd R input / V (R-Y) input / PR input 2nd G input / Y input 2nd B input / U (B-Y) input / PB input beam current limiter input black current input / V-guard input Red output Green output Blue output analog supply of Closed Caption decoder and digital supply of TV-processor (3.3 V) OTP Programming Voltage digital supply to core (3.3 V) oscillator ground supply crystal oscillator input crystal oscillator output reset digital supply to periphery (+3.3 V) TV/AV (AV1) / AV2 /S-VHS mode Output. TV/AV (AV1) / AV2 /S-VHS mode Output. Remote control signal input.
INSSW2 R2/VIN G2/YIN B2/UIN BCLIN BLKIN RO GO BO VDDA VPE VDDC OSCGND XTALIN XTALOUT RESET VDDP P1.0/INT1 P1.1/T0 P1.2/INT0
Note
1. The function of pin 20, 28, 29, 31, 32, 35 and 44 is dependent on the IC version (mono intercarrier FM demodulator /QSS IF amplifier and East-West output or not) and on some software control bits. The valid combinations are given in table 1. 2. the vertical guard function can be controlled via pin 49 or pin 50. the selection is made by means of the IVG bit in subaddress 2BH.
13
TABLE 1
IC version East-West Y/N CMB1/CMB0 bits FM-PLL version N Y QSS version N Y
00 -
01/10/11 AVL
00 -
01/10/11 EWD
00 0
01/10/11 1
00 SIFIN1 SIFIN2 SIFAGC
01/10/11 0 EWD 1
AM bits
Pin 20 Pin 28 Pin 29 Pin 31 Pin 32 Pin 35 Pin 44 Note
AVL
AUDEEM DECSDEM SNDPLL
SNDIF(1) REFO(2) AVL/SNDIF(1) AUDEXT REFO(2) AMOUT AUDEXT REFO(2) QSSO
AMOUT AMOUT AUDEXT
REFO(2) QSSO AMOUT
AUDOUT
Controlled AM or audio out
1. When additional (external) selectivity is required for FM-PLL system pin 32 can be used as sound IF input. This function is selected by means of SIF bit in subaddress 28H.
2. the reference output signal is only available for the CMB1/CMB0 setting of 0/1. for the other settings this pin is
a switch output(see also 5 table 67).
AN7522/AN17821/AN7523/AN17823 Symbol Vcc Out 1 (+) GND(out 1) Out 1 (-) Standby In 1 PIN 1 2 3 4 5 6 Function
Function : audio output Symbol GND In 2 VOL Out 2 (-) GND(out 2) Out 2 (+) PIN 7 8 9 10 11 12 Function ground Ch 2 input Volume Control Ch 2 output (-) Ch 2 Ground Ch 2 output (+)
Power supply Ch 1 output (+) Ch 1Ground Ch 1 output (-) Mute input Ch 1 input
Note: AN7523 is pin 1 to 9, AN7522 is pin 1 to 12. LA9302A/8177/LA78041/LA78040 Function : vertical output
Symbol INV IN VCC1 PUMP UP GND PIN 1 2 3 4 Function Input Power Pump up power Ground Symbol V OUT VCC2 NON INV IN PIN 5 6 7 Function Vertical output Output power supply Negative feedback
TDA9859
Symbol AV1L P1 MAINL CSMO Pin 1 2 3 4
Function : Universal Sound processor
Function AV1 Audio Left input Not used Main Audio Left input Smoothing Capacitor Symbol AV1R P2 AV2R CPS1 14 Pin 32 31 30 29 Function AV1 Audio input Right Not used AV2 Audio input Right Pseudo stereo Cap. 1
MAINR VP OUT R GND LINOR LINIR CBR1 CBR2 Headphone R CTR MAINOR SCL
5 6 7 8 9 10 11 12 13 14 15 16
Main Audio Right input Power Supply Right Output Ground Line Output Right Line Input Right Bass Cap. Right 1 Bass Cap. Right 2 Headphone-R output Treble Cap. Right Main Audio out Right I2C Bus clock
AV2L CPS2 OUT L MAD LINOL LINIL CBL1 CBL2 Headphone L CTL MAINOL SDA
28 27 26 25 24 23 22 21 20 19 18 17
AV2 Audio input Left Pseudo stereo Cap. 2 Left Output Not used (GND) Line Output Left Line Input Left Bass Cap. Left 1 Bass Cap. Left 2 Headphone-L output Treble Cap. Left Main Audio out Left I2C Bus data
6. Test point Waveforms
2.6Vpp 1.2Vpp 3.8Vpp 2.5Vpp 2.5Vpp
H TDA93XX PIN38 95Vpp
H TDA93XX PIN40 95Vpp
H TDA93XX PIN53 95Vpp
H TDA93XX PIN52 0.9Vpp
H TDA93XX PIN51 5Vpp
H CRT KR 1Vpp
H CRT KG 0.8Vpp
H CRT KB 1.3Vpp
H TDA93XX PIN33 2.7Vpp
H TDA93XX PIN34 1000Vpp
V TDA93XX PIN21 22Vpp
V TDA93XX PIN22 300Vpp TDA93XX PIN59
H V451 B
H V451 C
H HEATER
H T511 PIN7
7. IC voltages
15
TDA93XX PIN V PIN V PIN V PIN V 1 2.8 17 4 33 0.6 49 2.3 2 3.8 18 0 34 0.5 50 7.2 3 3.6 19 4 35 3.7 51 2.7 4 3.3 20 0.9 36 1.7 52 2.7 5 3.5 21 0.7 37 2.4 53 2.7 6 3.5 22 0.8 38 3.1 54 3.5 7 0.1 23 1.9 39 8 55 0 8 0.1 24 1.9 40 3.8 56 3.5 9 0 25 3.9 41 0 57 0.1 10 5.4 26 3.8 42 3.4 58 1.7 11 0.1 27 1.6 43 1.5 59 1.8 12 0 28 3.2 44 3.6 60 0 13 2.3 29 3.4 45 2.3 61 3.5 14 8 30 0 46 2.6 62 0.1 15 5 31 2.4 47 2.6 63 0.1 16 3 32 0.1 48 2.6 64 5
TDA8177 PIN V 1 0.7 2 15 3 -12 4 -15 5 0.3 6 15.9 7 -0.07
AN 7522 PIN V 1 12 2 7 3 0 4 7 5 3.3 6 1.4 7 0 8 1.4 9 0 10 7 11 0 12 7
TDA9859 PIN V PIN V PIN V 1 4.0 15 4.0 29 4.0 2 0 16 4.5 30 4.0 3 4.0 17 4.6 31 0 4 8.0 18 4.0 32 4.0 5 4.0 19 4.0 6 8.0 20 4.0 7 4.0 21 4.0 8 0 22 4.0 9 4.0 23 4.0 10 4.0 24 4.0 11 4.0 25 0 12 4.0 26 4.0 13 4.0 27 4.0 14 4.0 28 4.0
8 Trouble shorting
16
8.1 No signai, can not receive program.
Antenna Input Button Function Yes Noise-Normal No R558 etc.
Power off Blue BG.
Tuning Voltage Yes 33V VL VH Voltage Yes
Noise-Fad Interfere on Screen-No Check N201 Pin 23,24 Interference-Yes Interference-No Check Z101 Input Interference-Yes Interference No Check V101 Base V101 And Sorround Z101 Auto C105
No
Yes
Search Signa
N201 No Pin10,Pin11 Voltage Yes
N201
N201 Pin-38 Signa Yes V202 V201 Z201 etc.
5Vp-p(H) No
A101
Interference Yes
A101 And Surroun
N201 And Sorround
CHART
A
8.2 Unusual AV picture.
17
AV/S-VHS/YUV Signal Input Yes N802 Pin9,10 Voltag Yes N201 Pin63 or 62 Voltag No
No Re Table*
N201 Pin42 Signal
Yes
N201
1.1Vp-p(H) No
C806
Yes
N802 Input Signal Yes
No
AV Input Circuit
N802 etc.
CHART
B
8.3 One horizontal line.
18
Pin 2 +14V Power Pin 4 -16V Power
N301
No
Power Supply Circuit
Yes
Deflection Circuit R394 C304 etc. Yes
N201 Pin 21/22 Wave Form Yes 1.8Vp-p(V) N301 Pin 1/7 Wave Form No
No
C231 N201 etc.
Yes 0.6Vp-p(V)
N301
R301 R303 R218 R217 C301C303 etc. CHART C
8.4 No audio sound.
19
N201 Pin 44 Signa
Yes
N601 Pin1Powe 12V AV Yes
No
12V Power
No
TV N201 Pin 44 Signal No C210 etc. Yes N201 Pin 28 Signa No Yes Yes C213 Yes
N201 35Signal Yes
No
N801 Switching Circuit
N601 etc.
N201
N201
CHART
D
20
8.5 No picture and sound.
Power Supply Output Voltage No No Yes V451 Collector Vol. 115V Yes N201 Pin 39 Voltage 8V Yes No +8V Power Supply No R561etc
N201 Stand-by V451 Base Electrode No No Pin33 Wave Form Wave Form Normal? Yes Yes
0.8VH
Yes
C507 Voltage No
Yes 300V
Yes Heater
R402 etc
N201
R502 etc
D506 R511 Yes R510
Voltage No T401 etc.
Yes CRT
Ye
D512D511
Yes R504R503 D508 Yes T501 Secondary Load Yes V501 V502 etc. Yes T501 etc CHART
21
E
8. PURITY / CONVERGENCE ADJUSTMENT
PURITY ADJUSTMENT
1. 2. Demagnetize CRT with the demagnetizer. Loosen the retainer screw of the deflection yoke. Remove the wedges. Input a green raster signal from the signal generator, and turn the screen to green raster. Move the deflection yoke backward. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig2) Adjust the gap between two lugs so that the GREEN RASTER will come into the center of the screen. (Fig. 3) Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green. Insert the wedge to the top side of the deflection yoke so that it will not move.
P
WEDGE DEFLECTION YOKE
3. 4. 5. 6. 7.
CRT
4 6
P/C MAGNETS P: PURITY MAGNET 4: 4-POLES (convergence magnets) 6: 6-POLES (convergence magnets)
8.
Fig. 1
9.
PURITY MAGNETS
Long lug
10. Imput a crosshatch signal. 11. Verify that the screen is horizontal. 12. Input red and blue raster signals, and make sure that
purity is properly adjusted.
Short lug
Bring the long lug over the short lug and position them horizontally.
Fig. 2
(FRONT VIEW) GREEN RASTER
CENTER
Fig. 3
22
STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) and turn them to magenta (red/blue). 3. Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the center of the screen and turn them to white. 4. Repeat 2 and 3 above, and make the best convergence. (FRONT VIEW)
Fig. 1
(FRONT VIEW)
RED GREEN BLUE
DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down and overlap lines in the periphery. (Fig. 2) 2. Move the deflection yoke left to right and overlap the lines in the periphery. (Fig. 3) 3. Repeat 1 and 2 above, and make the best convergence.
BLUE RED GREEN RED GREEN BLUE
BLUE GREEN RED
Fig.2
(FRONT VIEW)
After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the 6 magnets with glue.
RED GREEN BLUE BLUE GREEN RED RED GREEN BLUE
BLUE
GREEN RED
Fig. 3
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