Watson TW-204M, TG-2100A Schematic
”S” CHASSIS(NTSC)
”S” CHASSIS(NTSC)
MANUALSERVICE
CONTENTS
SAFETY PRECAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
X-RAY radiation Precaution . . . . . . . . . . . . . . . . . . . . . . . . .3
Safety Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Product Safety notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
DIRCETION FOR GENERAL USE . . . . . . . . . . . . . . . . . . . . . .4
Automatic degaussing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
High Voltage Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Color - Purity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Center Convergence Adjustment . . . . . . . . . . . . . . . . . . . .5
Circumference convergence adjustment . . . . . . . . . . . . . .6
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
LOCATION & FUNCTION OF CONTROLS . . . . . . . . . . . . . .9
REMOTE CONTROL OPERATION . . . . . . . . . . . . . . . . . . . .10
GENERAL FEATURES AND ADJUSTMENTS . . . . . . . . . .11
FACTORY/SERVICE ADJUSTMENTS . . . . . . . . . . . . . . . . .12
TECHNICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . 16
1.Micro-Controller & Main Processor . . . . . . . . . . .16
2.Saw filter(Z101, Z102) . . . . . . . . . . . . . . . . . . . . . . . 19
3.Tuner(H001) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3-Input video switch(QV02) . . . . . . . . . . . . . . . . . . 24
5.PIP(QP01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.Triple video output amplifier(Q901) . . . . . . . . . . . . . . . . .30
7.Power Switching Regulator(Q801) . . . . . . . . . . . . . . . . . . 32
8.Vertical delection output IC(Q301) . . . . . . . . . . . . . . . . . . 33
9.Horizontal deflection output transistor(Q404) . . . . . . . .34
10.Universal hi-fi audio processor (QA01) . . . . . . . . . . . . 35
11.
Quasi Split-Sound circuit and AM demodulator (QS02)
. . . . . 37
12.Multi-Standard Sound Processor(QS01) . . . . . . . . . . . 38
13.
6W Mono Bridge Tied Load audio amplifier(Q606)
. . 42
14.
2 7W Stereo Bridge Tied Load audio amplifier(Q606)
. . . . 43
TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
No Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
No Raster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
No Picture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
No Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Vertical Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
No PIP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
OPTION LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
CRICUIT DIAGRAM
2
MANUALSERVICE
3
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid
such hazards, the high voltage must not be above the specified limit. The normal value of
the high voltage in this receiver is 30KV. The high voltage must not exceed 35KV. Each
time a receiver requires servicing, the high voltage should be checked according to the high
voltage check procedure on this manual. It is recommended that the reading of the high
voltage be recorded as a part of the service record. It is important to use an accurate and
reliable high voltage meter.
2. The only source of X-RAY RADIATION in this television is the picture tube. For continued
X-RAY RADIATION protection, the replacement of tube must be exactly the same type tube
as specified in the parts list.
3. Some parts in this television have special safety-related characteristics for X-RAY
RADIATION protection. For continued safety, parts replacement should be undertaken only
after referring to the PRODUCT SAFETY NOTICE below.
4. Serviceman - WARNING : To Reduce the Risk of Possible Exposure to X-Radiation, take
X-Radiation Protective Measures(See Service Manual) For Personnel During Servicing.
CAUTION : SHORT ANODE LEAD ONLY TO CHASSIS.
DO NOT PLACE THIS PRODUCT ON AN UNSTABLE CART, STAND, TRIPOD, BRACKET, OR
TABLE. THE PRODUCT MAY FALL, CAUSING SERIOUS PERSONAL INJURY AND
SERIOUS DAMAGE TO THE PRODUCT. USE ONLY WITH A CART, STAND, TRIPOD,
BRACKET, OR TABLE RECOMMENDED BY THE MANUFACTURER, OR SOLD WITH THE
PRODUCT. FOLLOW THE MANUFACTURER’S INSTRUCTIONS WHEN INSTALLING THE
PRODUCT AND USE MOUNTING ACCESSORIES RECOMMENDED BY THE NUFACTURER.
A PRODUCT AND CART COMBINATION SHOULD BE MOVED WITH CARE. QUICK
STOPS, EXCESSIVE FORCE, AND UNEVEN SURFACES MAY CAUSE THE PRODUCT
AND CART COMBINATION TO OVERTURN.
SAFETY PRECAUTION
WARNING : Service should not be attempted by anyone unfamiliar with the necessary
precautions on this television. The followings are the necessary precautions to be
observed before servicing.
1. Since the chassis of this television is directly connected to the AC power line (Hot chassis),an
isolation transformer should be used during any dynamic service to avoid possible shock hazard.
2. Always discharge the picture tube anode to the CRT conductive coating before handing the
picture tube. The picture tube is highly evacuated and, if broken, glass fragments will beviolently
expelled. Use shatterproof goggles and keep picture tube away from the body while handing.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are
put back in place, such as non-metallic control knobs, insulating covers, shields isolation
resistor-capacitor network, etc.
4. Before returning the set to the customer, always perform an AC leakage current check on the
exposed metallic parts of the cabinet such as terminals, screwheads, metal overlays control
shafts, etc. to insure that the set is safe to operate without danger of electrical shock.
5. Plug the AC line cord directly into a AC 120V AC outlet. (do not use a line isolation
transformer during this check) Use an AC voltmeter having 5,000 ohm per volt or more sensitivity
in the following manner, Connect a 1,500 ohm 10 watts resistor, paralleled by a 0.15uF, AC type
capacitor, between a known good earth ground (water pipe, conduit, etc.) and the exposed
metallic parts, one at a time.
SAFETY PRECAUTION
Measure the AC voltage across the combination of 1,500 ohm resistor and 0.15uF capacitor.
Reverse the AC plug at the AC outlet and repeat. AC voltage measurements for each
exposed metallic part.
Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC.
Any value exceeding this limit constitutes a potential shock hazard and must be corrected
immediately.
PRODUCT SAFETY NOTICE
Many electrical parts in this chassis have special safety-related characteristics. These
characteristics are often passed unnoticed by a visual inspection and the protection afforded by
them cannot necessarily be obtained by using replacement, rated for higher voltage, wattage,
etc. Replacement parts which have these special safety characteristics are identified in this
manual and its parts list. Before replacing any of these components, read the parts list in this
manual carefully. The use of substitute replacement parts which do not have the same safety
characteristics as specified in the parts list may create shock, fire, x-ray radiation or other
hazards.
1. In the majority of cases, a color television receiver will need only slight touch-up adjustment
upon installation.
Check the basic characteristics such as height, vertical sync, horizontal sync and focus.
Observe the picture for good black and white objectionable color shading. If color shading is
evident, demagnetize the receiver. If color shading still persists, perform purity and
convergence adjustments.
This should be all that is necessary for optimum receiver performance.
2. THIS RECEIVER TRANSISTORIZED AND SPECIAL CARE MUST BE TAKEN. READ THE
FOLLOWING NOTES BEFORE ATTEMPTING ALIGNMENT.
1) Alignment requires an exacting procedure and should be undertaken only when necessary.
2) An isolation transformer must be used to prevent a shock hazard.
3) The test equipment specified or its equivalent is required to perform the alignment properly.
Any use of equipment which does not meet these requirements may result in an improper
alignment.
4) A correct matching of the equipment is essential. A failure to use proper matching will result
in responses which cannot represent the true operation of the receiver.
5) An use of excessive signal from a sweep generator can cause overloading of receiver circuit.
It should be avoided to obtain a true response curve. Insertion of markers from the maker
generator should not cause distortion of the responses.
6) Connect the TV only to an AC power source with voltage and frequency as specified on the
backcover nameplate.
7) Do not attempt to connect or disconnect any wire while the receiver is in operation. Make sure
the power cord is disconnected before replacing any part in the receiver.
3. REFER TO FIGURES IN PAGE 8 FOR ALIGNMENT POINTS.
MANUALSERVICE
AC VOLTMETER
0.15uF
Place this probe
on each exposed
metal part
Good earth ground
such as a water
pipe, conduit etc
1500 ohm
10 watt
4
DIRECTION FOR GENERAL USE
AUTOMATIC DEGAUSSING
A degaussing coil is mounted around the picture tube so that external degaussing after moving
the TV should be unnecessary. But the receiver must be properly degaussed upon installation.
The degaussing coil operates for about 1 second after the power is switched ON. If the set is
moved or turned in a different direction, the power should be OFF for at least 15 minutes.
If the chassis or parts of the cabinet become magnetized, it will result in a poor color purity. If
this happens, use an external degaussing coil. Slowly move the degaussing coil around the
faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil to
a distance of about 6 feet before turning power OFF.
If color shading persists, perform the following Color Purity and Convergence adjustments.
HIGH VOLTAGE CHECK
CAUTION : There is no high voltage adjustment on this chassis. The +B power supply should
be +120 volts (with full color-bar input and normal picture level).
1. Connect an accurate high voltage meter to the second anode of the picture tube.
2. Turn on the receiver. Set bright and contrast controls to the minimum (zero beam current).
3. The high voltage must be measured below 34KV under any conditions.
4. Set sub-Bright DATA(SBR) minimum in FACTORY 1 MODE to ensure that the high voltage
does not exceed the limit under any conditions.
COLOR-PURITY ADJUSTMENT
NOTE : Before attempting any convergence adjustments, the TV set should be operated for at
least fifteen minutes.
1. Demagnetize the picture tube and cabinet using a degaussing coil.
2. Set the Contrast and Bright controls to the maximum.
3. Adjust RCUT and BCUT data in service mode to provide only a green raster. Advance GCUT
data if necessary.
4. Loosen the clamp screw holding the yoke and slide the yoke backward to provide vertical
green belt (zone) in the picture tube. (See Figure 1)
5. Remove the Rubber Wedges.
6. Rotate and spread the tabs of the purity magnet ( See Figure 2 ) around the neck of the picture
tube until the ground belt is in the center of the screen. At the same time, center the raster
vertically.
7. Move the yoke slowly until a forward uniform green screen is obtained. Tighten the clamp
screw of the yoke temporarily.
8. Check the purity of the red and blue raster by adjusting the R/G/B cut and GDV/BDV data.
9. Obtain a white raster, referring to "WHITE BALANCE ADJUSTMENT".
10. Proceed with the convergence adjustment.
CENTER CONVERGENCE ADJUSTMENT
1. Receive a crosshatch pattern from a color bar signal generator.
2. Adjust the Contrast and Bright controls for well defined pattern.
3. Adjust two tabs of the 4-pole magnets to change the angle between them ( See Figure 2 )
and superimpose red and blue vertical lines in the center area of the picture screen.
( See Figure 2)
4. Turn both tabs at the same line keeping constant the angle to superimpose the red and blue
horizontal lines at the center of the screen. ( See Figure 2 )
MANUALSERVICE
5
5. Adjust two tabs of 6-pole magnets to superimpose the red and blue lines with green one.
Adjusting the angle affects the vertical lines and rotating both magnets affects the horizontal
lines.
6. Repeat adjustments 3, 4, 5 keeping in mind red, green and blue movements, because
4-pole magnets and 6-pole magnets interact and make dot movement complex.
CIRCUMFERENCE CONVERGENCE ADJUSTMENT
This adjustment requires 3 rubber wedges and 3 glass cloth tapes.
1. Loosen the clamping screw of deflection yoke to allow the yoke to tilt.
2. Place a wedge as shown in Figure 1 temporarily.
(Do not remove cover paper on adhesive part of the wedge.)
3. Tilt the front of the deflection yoke up or down to obtain better convergence in circumference.
(See Figure 2) Push the mounted wedge into the space between picture tube and the yoke
to hold the yoke temporarily.
4. Place other wedge into bottom space and remove the cover paper to stick.
5. Tilt the front of the yoke right or left to obtain better convergence in circumference. ( See Figure 2 )
6. Hold the yoke position and put another wedge in either upper space. Remove cover paper
and stick the wedge on picture tube to hold the yoke.
7. Detach the temporarily mounted wedge and put it in another upper space. Stick it on picture
tube to fix the yoke.
8. After placing three wedges, recheck overall convergence. Tighten the screw firmly to hold
the yoke tightly in place.
9. Stick the grass cloth tapes on 3 wedges as shown in Figure 1.
MANUALSERVICE
6
MANUALSERVICE
ADHESIVE
BLU RED
BLU
RED
31mm(1-3/16
)
FIGURE 1. COLOR PURITY ADJUSTMENT
FIGURE 2. CONVERGENCE ADJUSTMENT
DEFLECTION TOKE
RUBBER WEDGE
ADHE SIVE
FIXED
CONVERGENCE
MAGNET ASS’Y
RUBBER WEDGES
LOCATION
ADJUST THE ANGLE
(VERTICAL LINES)
ROTATE TWO TABS
AT THE SAME TIME
(HORIZONTAL LINES)
DEFLECTION TOKE
RUBBER
WEDGES
6-POLE
MAGNET
4-POLE
MAGNET
PURITY
MAGNET
4-Pole Magnets Movement 6-Pole Magnets Movement Incline the Yoke up(or down) In cline the Yoke right (or left)
BLU GRN
BGR
RGB
BGR
B
G
R
R
G
B
R
G
B
B
G
R
RED
RED
BLU
GRN
Center Convergence by convergence Magnets Circumference Convergence by DEF. Yoke
7
MANUALSERVICE
RECEPTION SYSTEM
POWER REQUIREMENTS AC 90~250V 50/60Hz(AUTO
)
POWER CONSUMPTION
14" : 55W , 20" : 78W, 21" : 86W
SOUND OUTPUT POWER
MONO : 4.5W
ANTENNA IMPEDANCE 75 OHM UNBALANCED TYPE
SCREEN SIZE 50.8 Cm (DIAGONAL 21 INCH
)
OPERATING FREQUENCIES
VIDEO IF 45.75MHz
SOUND IF 41.25MHz
RECEIVING
CHANNELS
VHF CH : 2 TO 13
UHF CH : 14 TO 69
CATV CH : 1, 14 TO 125
NTSC-M : TDA9377
NTSC-M, PAL-M, PAL-N : TDA9370
STEREO
AV : PSEUDO RF STEREO
RF : ZENITH
TOTAL 181CH
8
SPECIFICATIONS
AV STEREO : 5W(R) + 5W
RF STEREO : 6.3W + 6.3W AT 10%, 1KHz
MANUALSERVICE
9
LOCATION AND FUNCTION OF CONTROLS
WARNING : TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS
TELEVISION TO RAIN OR MOISTURE.
1. TV/Video Key
2. Menu Key
3. Volume Down (-) Key
4. Volume Up (+) Key
5. Channel Down (
) Key
6. Channel Up (
) Key
7. Remote Control Sensor
8. Main Power Key
9. Audio/Video 2 In Jacks
10. Antenna Holder
11. Antenna Jack (75 ohm)
12. Audio/Video In Jacks
TV/VIDEO
MENU
POWER
_
VOL +
CH
29876543
11
10
12
1
REAR
FRONT
MANUALSERVICE
10
BA TTERY INSTALLATION
Replace two batteries in the battery compartment at the same time.
lnsert "AAA" batteries, observing the polarity ( or ) marked on the unit.
Batteries should last about a year under normal use. lf the operation is unstable(either
channel or volume does not change), replace the batteries. When the hand unit is not used
for a long, or when the batteries are used up, take out the batteries to prevent possible
leakage. To avoid any malfunction of the remote control, press only one button at a time.
REMOTE CONTROL OPERATION
Remocon depends on the option of model
Direct channel
selection Button
Display Button
Mute Button
Sleep Button
Picture Button
Quick View Button
Add/Delete Button
CCD Button
100 Button
Power Button
Channel Up (
) Button
Menu Button
Volume Up (
)Button
Volume Down (
)Button
Channel Down( )Button
TV/Video Button
Picture Standard Button
MANUALSERVICE
11
1. NOTE
Because this is not a hot chassis, it is not necessary to use an isolation transfromer.
However, the use of isolation transformer will help protect test instrunents.
Adjustment must be done in the correct order.
Supply AC 90~260V, 50/60Hz in general.
Most of this chassis is designed to operate in the wide range of power supply.
Automatic degaussing
The degaussing circuit operates for about 1 secord after the power is switched on.
If you change the direction of the TV set in a state of Power-On, any color-blur may happen.
In that case, plug it off and plug it on after 1 more hour.
If color shading still persists, perform purity and convergence adjustments.
2. EEPROM(Q002) REPLACEMENT
When Q002 is replaced, all values are reset to INITAL MICRO-CONTROLLER DATA.
Because the pre-set data is reset after the replacement, above all, select factory
mode and write down all the pre-set data befote the replacement.
After the replacement, select factory mode and set the initial data referring to the
written-down data.
If you fogot to write down all the pre-set data or you can t turn on TV, re-adjust the initial
data according to the adjustment manual, follow the below procedure.
Roplace the defective Q002 with a new one.
In the Stand-by mode, Press DISPLAY + MENU + 3 + 8 + POWER(ON) button
on the romote controller in sequence.
And then, factory mode will be displayed on the screen.
Input the signal like a color-bar pattern into antenna terminal, or input the current
broadcasting signal into antenna terminal.
3. WHEN CRT IS REPLACED
Do the following adjustments in the factory made.
SCREEN adjustment(SCREEN VOLTAGE)
W.BAL adjustment (R-Cut, G-Cut, R-DRV, G-DRV, B-DRV)
PICTURE adjustment (HRS(50), HRS(60), HEIGHT)
NOTE
You don
t need to select 8.EEPROM Rest and 9.UOC Control.
Two items are critical to the system operation.
Press TV/VIDEO or MTS button when you want to finish the factory adjustments.
TV/VIDEO button:the early state that you bought TV sets.
MTS button:the previous state before you enter the factory mode.
4.SIF VCO VOLTAGE CHECK
Connect the (+) terminal of multi-meter to TP60(LS06) and check the
SIF VCO Voltage within DC1.8
0.5V.
GENERAL FEATURES AND ADJUSTMENTS
MANUALSERVICE
12
1. Procedure for the factory adjustment mode
In the Stand-By mode, the factory(Service) mode is activated by pressing the
DISPLAY + MENU + 3 + 8 + POWER(ON) button in sequence on the remote controller.
The menu of the factory mode will be displayed.
The factory mode consists of 9 componets:
1. SCREEN
2. W.BAL
3. PICTURE
4. SERVICE1 ;You do not need to Select it.
5. VOLUME TEST ;You do not need to Select it.
6. Device Check ;You do not need to Select it.
7. OPTION
8. EEPROM Reset ;You do not neet to Select it
9. UOC Control ;You do not need to Select it.
10. V-CHIP TEST ;You do not need to Select it.
Select each adjustment mode by pressing CH up( )or CH down( ) button.
And access it by pressing vol up(+)or vol down(-) button.
FACTORY/SERVICE ADJUSTMENTS
MANUALSERVICE
13
2. SCREEN Voltage Adjustment
Turn the TV set to receive a color bar pattern.(Standard picture)
Connect the probe of oscilloscope to the RK (Red Cathode) of CPT Board.
Adjust Screen Volume of FBT so that the waveform is the same as below figure.
FACTORY/SERVICE ADJUSTMENTS
P/W:
1H-LINE
Horizontal
FlyBack Time
Black level
145Vp-p
White level
GND for dc
The waveform of RK(Red Cathode) of CPT Board
MANUALSERVICE
14
3. Deflection Adjustments
HRS(50) adjustment : Tune the TV set to a LION HEAD
pattern signal with 50Hz of
vertical frequency.
HRS(60) adjustment : Tune the TV set to a LION HEAD
pattern
Signal with 60Hz of vertical ferquency.
HEIGHT adjustment : Tune the TV set to a LION HEAD pattern
Signal and adjust the vertical amplitude to
4 bars both the Top and the bottom.
4. WHITE BALANCE Adjustments(manual)
Input PURE WHITE pattern into antenna terminal or into
Video input terminal.
Keep TV on for about 30 minutes prior to white balance adjustment.
Screen Voltage Adjustment (page 13)
Place the probe of CRT Analyzer at the center Position of picture screen.
Adjust CONTRAST & BRIGHTNESS until
Y value of CRT analyzer
becomes 35FL above roughly.
Select 2.W.BAL and press Vol(+) button.
And then
R-CUT 32 will be displayed.
1 button : R-CUT
5 button : G-CUT
9 button : R-DRV
0 button : G-DRV
100 button : B-DRV
Select R-DRV & G-DRV and adjust them to get the
color coordinates below in the high light state.
In this case, fix the reference color(B-DRV) as possible as.
X COORDINATE Y COORDINATE
0.261 0.268
FACTORY/SERVICE ADJUSTMENTS
MANUALSERVICE
15
5. Focus ADJUSTMENT
Input CROSS DOT pattern into antenna terminal on video input terminal.
Rotate the variable resistor of FOCUS terminal on the flyback
transformer until the horizontal and vertical line becomes slim.
Check the surrounding FOCUS in the lion head pattern.
FACTORY/SERVICE ADJUSTMENTS
MANUALSERVICE
16
TECHNICAL INFORMATION
1. MICRO-CONTROLLER & MAIN PROCESSOR
MANUALSERVICE
17
TECHNICAL INFORMATION
TDA937X PS/N2 series
MANUALSERVICE
18
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
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
SYMBOL
P1.3/T1
P1.6/SCL
P1.7/SDA
P2.0/TPWN
P3.0/ADC0
P3.1/ADC1
P3.2/ADC2
P3.3/ADC3
VSSC/P
P0.5
P0.6
VSSA
SECPLL
VP2
DECDIG
PH2LF
PH1LF
GND3
DECBG
AVL/EWD(1)
VDRB
VDRA
IFIN1
IFIN2
IREF
VSC
TUNERAGC
AUDEEM/SIFIN1
DESCRIPTION
Power(ACTINE LOW) ON:LOW, STAND-BT:HIGH
Serial CLOCK
Serial DATA
SVHS MODE DETECTION INPUT(ACTIVE LOW)
NTSC SYSTEM CONVERSION OUTPUT(ACTIVE LOW)
AUDIO/VIDEO MODE SWITCH 1
CONTROL BUTTON KEY INPUT 1
CONTROL BUTTON KEY INPUT 2
digital ground for
-Controller core and periphery
AUDIO/VIDEO MODE SWITH 2
Swith Signal Video (status) input
analog ground of Teletext decoder and digital ground of TV-Processor
SECAM PLL decoupling
2
nd
supply voltage TV-processor(+8V)
decoupling digital supply of TV-processor
phase-2 filter
phase-1filter
ground 3 for TV-processor
bandgap decoupling
Automatic Volume Levelling/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 of SIF input 1
decoupling sound demodulator of SIF input 2
ground 2 for TV processor
narrow band PLL filter/AGC sound IF
Automatic Volume Levelling/sound IF input/subcarrier reference output/AM output
(non controlled)
horizontal output
flyback input/sandcastle output
external audio input/QSS intercarrier out/AM audio output(non controlled)
EHT/overvoltage protection input
IF-PLL loop filter
IF video output/selected CVBS output
main supply voltage TV-processor(+8V)
internal CVBS input
ground 1 for TV-processor
external CVBS/Y input
chrominance input (SVHS)
audio output /AM audio output(volume controlled)
2
nd
RGB/YUV insertion input
2
nd
R input /V(R-Y)input
2
nd
G input/Y input
2
nd
B input/U(B-Y)input
beam current limiter input/(V-guard input, note 2)
black current input/(V-guard input, note2)
Red output
Green output
Blue output
analog supply of Teletext decoder and digital suppply of TV-processor(3.3V)
OTP Programming Voltage
digital supply to core(3.3V)
oscillator gorund supply
crystal oscillator input
crystal oscillator output
reset
digital supply to periphery(+3.3V)
Remote key matrix input
I
2
C BUS STOP CONTROL PIN(LOW:BUS STOP)
MUTE OUTPUT(ACTIVE LOW)
PINNING
TECHNICAL INFORMATION
MANUALSERVICE
19
2.Saw filter(Z101) : IF filter for Intercarrier / Multe-standard Application
Standard
M/N-FCC
USA
Features
TV IF filter with Nyquist slope and sound shelf
Constant group delay
Terminals
CuFe, tinned
Pin configuration
1 Input
2 Input-ground
3 Chip carrier-ground
4 Output
5 Output
Standard
M/N
Features
TV IF audio filter with pass bands for picture carrier at 45.75MHz and sound carrier at 41.25MHz
Terminals
Tinned CuFe alloy
Pin configuration
1 Input
2 Input-ground
3 Chip carrier-ground
4 Output
5 Output
Saw filter(Z102) :
IF filter for Audio Applications (RF STEREO ONLY)
3
2
1
4
5
3
2
1
4
5
TECHNICAL INFORMATION
MANUALSERVICE
20
3. Tuner(H001)
features
Receiving System : NTSC M, PAL M/N
Channel :
Intermediate Frequency PIF : (45.75)MHz
CIF : (42.17)MHz
SIF : (41.25)MHz
Input Impendance : UHF/VHF Terminal (75) , Unbalanced
Output Impendance : 75 , Un Balanced
Band Change Over System : (PLL Control System)
Tuning System : (Electronic Tuning System with PLL)
Terminal For External Connection
TECHNICAL INFORMATION
Air CATV
VHF Low 2~6ch (A-8) A-5~Bch
High 7~13ch C~W+11ch
UHF 14~69ch W+12~W+84ch
Loading...