Disassembly procedure is explained as below. Before disassembling the TV set please read the safety instructions
and warning parts of the service manual.
• Turn off TV and plug the mains out
• Remove screws (6 pieces) to dismount the back cover
• Remove 2 connection cables between chassis and back
cover. Front AV and lineout sockets should be disconnected.
• Cut the tie, which fixes DVD cables together.
• Disconnect the following sockets to take the chassis out ;
Loader,
IR receiver
Deflection cable
Degaussing coil
Speaker cable
Power cable
• Remove the ground cable localised between tube mod-
ule, chassis and mass cable.
• Remove the CRT drive module from picture tube.
• Desolder the ground cable of loader from tuner.
• Remove anode cable localised on the picture tube.
• Slide out the chassis through the guides (no screws,
straps or other fixing).
CRT drive module must be grounded via mass
cable.
Grounding must be completed between loader and
chassis via soldering cable between tuner and loader.
Front AV must be connected to SS05 and line out
should be connected to SS09 via 9P and 5P sockets,
respectively.
• Place the back cover back to its place.(6 screws)
• Plug the mains in.
• Turn on the TV.
Grounding must be completed between loader and
chassis via soldering cable between tuner and loader.
Front AV must be connected to SS05 and line out
should be connected to SS09 via 9P and 5P sockets,
respectively.
• Place the back cover back to its place.(6 screws)
• Plug the mains in.
• Turn on the TV.
Please follow the assembly instructions
explained below;
• Be sure that all of the loader cables are free. If necessary
fix the cables firmly to avoid any kind of squeezing
while inserting the chassis back.
• Before inserting the chassis into guides, check the con-
trol buttons in front of the chassis. In case of misplacement of control buttons place them into correct position.
• Slide the chassis into guides until the connection cables
could be reached to their sockets.
• Plug in the sockets coming from led PCB, 5P to KL01
and 4P to KL02
• Plug in the sockets coming from loader, 4P to SS03, 6P
to SS13 and 12P (blue one pointing to right) to SS18.
• Plug in the power cable socket to AC01.
• Plug in the degauss cable socket to KP02.
• Plug in the speaker cable socket to HS03.
• Place the CRT drive module on picture tube.
• Slide the chassis completely on its place. Be careful
about control buttons.
• Plug in the deflection cable socket 4P to KD01 and 2P to
SD21.
• Place the anode cable to picture tube. Be careful about
high voltage!
4
Page 5
PT 90 NEAT Service Manual
/R
1. TECHNICAL SPECIFICATIONS, CONNECTIONS AND
CHASSIS OVERVIEW
1.1. Technical Specifications
1.1.1 Reception
Tuning System: PLL
Color Systems: PAL SECAM NTSC
Sound Systems: B/G D/K L/L’
A/V Connections: SCART AND FRONT AV
Channel Selections: AIR, CABLE : The entire band via frequency search
IF Frequency: B/G, D/K, L: 38.9 MHZ
L’: 33.4
I: 39.5MHZ
Aerial Input: 75 OHM
1.1.2 Miscellaneous
Audio Output (RMS): 2 x 2.5 W
Mains Voltage: 220-240 V (± 10 %)
Mains Frequency: 50/60 Hz (± 5 %)
Ambient Temperature:
Maximum Humidity:
Power Consumption: 50 W
Standby Power Consumption: 4 W
1.2 Connections
A/LA
EURO AV
PCM
Rear Connections
VIDEO L AUDIO R
Side Connection
5
Page 6
PT 90 NEAT Service Manual
EURO SCART
I- Audio output 1. right channel 0.5 VRMS/<l k 0
2- Audio input 1. right channel 0.5 VRMS (connected to No.6)
3- Audio output 2. left channel 0.5 VRMS (connected to No.1)
4- GND (audio)
5- GND
6- Audio input 2. left channel 0.5 VRMS/>10k 0
7- RGB input, blue (B)
8- Switch signal video (status)
9- GND
10- Reserved for clock signals (not connected)
11- RGB input, green (G)
12- Reserved for remote control (not connected)
13- GND
14- GND switch signal RGB
15- RGB input, red (R)
16- Switch signal RGB
17- GND (video)
18- GND19- Video output 1 Vpp/75 ohm
20- Video input 1 Vpp/75 ohm
21- Shield
13579111315171921
2468 10 12 14 16 18 20
6
Page 7
PT 90 NEAT Service Manual
14 NEAT CTV 001
CHASSIS OVERVIEW
1- FRONT CABINET 002
2- PICTURE TUBE
3- PICTURE TUBE SCREW
4- SPEAKER
5- SPEAKER SCREW
6- DVD DRIVER
7- DVD DRIVER SCREW
8- EJECT BUTTON 001
9- EJECT BUTTON 001 SCREW
10- MULTIBUTON LEFT
11- MULTIBUTON LEFT SCREW
12- MULTIBUTON RIGHT
13- MULTIBUTON RIGHT SCREW
14- ON-OFF BUTON
15- ACYRILIC WINDOW 001
16- INFRA LED PCB
17- INFRA LED PCB SCREW
18- REFLECTOR
19- REFLECTOR SCREW
20- DVD HEAD
21- CHASSIS RAIL RIGHT
22- CHASSIS RAIL LEFT
23- MAIN CHASSIS
24- BACKCOVER
25- BACKCOVER SCREW
26- STYROPHOR
14 NEAT CTV 002
1- FRONT CABINET 002
2- PICTURE TUBE
3- PICTURE TUBE SCREW
4- SPEAKER
5- SPEAKER SCREW
6- DVD DRIVER
7- DVD DRIVER SCREW
8- EJECT BUTTON
9- EJECT BUTTON SCREW
10- MULTIBUTON LEFT
11- MULTIBUTON LEFT SCREW
12- MULTIBUTON RIGHT
13- MULTIBUTON RIGHT SCREW
14- ON-OFF BUTON
15- ACYRILIC WINDOW 002
16- INFRA LED PCB
17- INFRA LED PCB SCREW
18- REFLECTOR
19- REFLECTOR SCREW
20- DVD HEAD
21- CHASSIS RAIL RIGHT
22- CHASSIS RAIL LEFT
23- MAIN CHASSIS
24- BACKCOVER
25- BACKCOVER SCREW
26- STYROPHOR
27- AVPCB
28- AVPCB HOLDER
7
Page 8
PT 90 NEAT Service Manual
KEYBOARD
All the keys on the keyboard are used same as the relevant keys on the RC. But navigation in menus is quite different. In order to open Main Menu from keyboard V+ and V- keys must be pressed together. After displaying the
menus P+ and P- keys will be used as Navigation Up and Navigation Down keys. There is no enter key on the keyboard so V+ or V- will be used as Menu Right key if a submenu item is highlighted on the menu. These two keys will
also be used as Navigation Left and Navigation Right keys in order to change any highlighted options right side
value. To return previous menu V+ and V- keys should be pressed together.
2. SAFETY INSTRUCTIONS AND WARNINGS
SAFETY INSTRUCTIONS FOR SERVICE
REPAIRS
1. Use only the original spare parts with the same specifications for replacement.
2. Only the original fuse value should be used.
3. Safety components, indicated by the symbol, should
be replaced by components identical to the original ones.
4. Main leads and connecting leads should be checked for
external damage before connection. Insulation must be
checked.
5. Parts contributing to the safety of the product must not
be damaged or obviously unsuitable. This is valid especially for insulators and insulating parts.
6. Thermally loaded solder pads are to be sucked off and
re-soldered.
7. Ensure that the ventilation slots are not obstructed.
8. Potentials as high as 25 KV are present when this
receiver is operating. Operation of the receiver outside the
cabinet or with back cover removed involve a shock hazard
from the receiver.
9. Servicing should not be attempted by anyone who is not
thoroughly familiar with precautions necessary when working on high voltage equipment. Perfectly discharge the
high potential of the picture tube before handling it. The
picture tube is highly evacuated and if broken. Glass fragments will be violently expelled. Always discharge the picture tube anode to the receiver chassis to keep of the
shock hazard before removing the anode cap.
10. Keep wire away from the high voltage or high temperature components.
11. When replacing a wattage resistor, keep the resistor
10mm away from the circuit board.
12. Fast heating up (e.g. by bringing the Combi from a cold
place into warm and humid room) can result in moisture
condensing on the pickup lens of the DVD Module, thus
influencing the playability for a certain time. Before checking the performance, the DVD Loader should be stabilized
for at least 4 hours.
13. Never try to repair DVD module when it is ON. The
laser beam is highly dangerous and it may cause permanent damages.
HANDLING THE MOS CHIP COMPONENTS
MOS circuit requires special attention with regard to static
charges. Static charges may occur with any highly insulated plastics and can be transferred to persons wearing
clothes and shoes made of synthetic materials. Protective
circuits on the inputs and outputs of MOS circuits give protection to a limited extend only due to time of reaction.
Please observe the following instructions to protect the
components against ESD.
1. Keep MOS components in conductive package until they
are used. Most components must never be stored in styropor materials or plastic magazines.
2. Personnel must not touch the MOS components to avoid
electrostatic discharging.
3. Hold the component by the body touching the terminals.
4. Use only grounded instruments for testing and processing purposes.
5. Remove or connect MOS Ics when operating voltage is
disconnected.
6. Personnel in charge must make sure that they are connected with the same potential as the mass of the set by a
wristband with resistance.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY radiation. To avoid such hazard, the high
voltage must not be above the specified limit. The nominal
value of the high voltage of this receiver is 25KV at zero
beam current (minimum brightness) under 220 V AC power
source. The high voltage must not under any circumstance,
exceed 30KV. It is recommended the reading of the high
voltage to be recorded as a part of the service record. It is
important to use an accurate and reliable high voltage
meter.
2. The primary source of X-RAY radiation in the TV receiver is the picture tube. For continued X-RAY radiation protection, the replacement tube must be exactly the same
type tube as specified in the part list.
8
Page 9
4
2
2
1
0
5
/
/
/
7
7
/
4
/
1
7
/
1
/
4
_
_
7
0
_
_
7
_
7
6
1
_
1
8
5525149
44237363534
2
/
6
/
_
8
2
113151617181925
2
3
140
4
1
1
2
3
1
2
2
0
7 6
6
2
2
2
2
2
1
2A7
N
1
V
_
_
2
4
51618
8
8
3. BLOCK DIAGRAM
3B
IA03
MN405
12
IA01
TDA7057
56
921
IC0
ST92195
8
18
1
KEYB
1
1
VOL
DVD SB
4
1
AUDOUT A
1
VOL
4
1
2
R_DVD
A10-3
MUTE_DVD
A8-10/A10-1/A7 -1
1
OSD A
V
4
I060
2
L DVD A1
4
LM358
1
A
7
HEATER A
3
ID41 TDA177
34
2
A9 VERTICAL
A2 -6
FB_OSD
CVBSOUT
333
A7-5/A2-10
1
VERT A2
PT 90 NEAT Service Manual
2
AMP A2
1V
A10 AV INTERFACE
OSD A7
V
SS08
CONN.
FBT
1
1
1
24 V12
8
4
1
3
BCL A2
3
9
2
HOUT A2
A
R DVD
2
A
L DVD
MUTE
1/A8-1
_DVD A7-
A8-4
DOUT
A8-5
CVBS_DVD
HEATER
A7 -CONTROLLERA8 AUDIO AMPLIFIER
A2 VIDEO PEOCESSOR
1
MUTE_DVD
A8-10/A8-1/A10-1
CLI 1L/L
2
3
A
A
2
1
A
A
2
1
AUDOUT A8
5
47
ICV1
STV2246
1
L/L
SDA A
2
5/A
IF1 A
SCL A
6
5/A
IF1 A
1/A
SD
1
TV/DVD A
7
2
A
1
HEATER A6
HOUT A
4847464
7
8
4
AGC
IF2
2/A
CL A
4
1
A1 TUNER
G OSD A2
B OSD A25R OSD A2
1
BCL A
VERT
111413202526272
2
1
IN
SC
AV STATUS A3
3
CVBS A
5
FBEXT A
2
SC_I A
FB_OSD
A2-10/A7-5
6
CVBSOUT A7
3
CVBS A
A3 SCART
1
OSD A
AMP A
FB
V
4
8
CV BSEXT A3
B
9
20
SCART1
19
14
5
1
15
18
21
10
11
12
17
8
7
6
13
4
3
2
SS01
SDA
A2-1/A4-1/A1-1
OSD A
R
7
G
7R A2-6
1 G A
8 CLI A
B A
A2 -1
AV_STATUS
SCL
A2-2/A4-2/A1-2
OSD A
G
R 6FBEXT A
A11
OSD A
B
5
IC0
A4
KEYBOARD
SDA
110
16
5
12V
8
5
WP0
1
IP01
TDA16846
3142
24C08
5
6
A
SCL
A
A7-1/A2-1/A1-1
1
A5 POWER SUPPLYA6 HORIZONTAL
KEYB A7
AC I
9
Page 10
PT 90 NEAT Service Manual
T
V
16
V
D002
D001
D0045VD005
4. SUPPLY VOLTAGE DIAGRAM
5VDVD
12VDVD
R081
45
19
R012
R052R028RA09
20
R013
5V
5V
5VA
5VA
5VA
T001
43
393433
40
41
21
5VD
31
25
26
5VA
5V
VIDEO
1
5V
LV01
PROC.
STV2246/47/48
2
12
LV01
53
LV03
17
DV23
8V
LV07
SA02
A2
A5 POWER SUPPLY
LV01
45
252627
DV22
DV21
8V
DV20
28
8V
+12V TO RA10
A8
RA11
IA03
8V
11
MN4
053
RS58
5V
R002
R008
56
ST92195/92185
2
T003
A7
5V
55
R011
5V
R080
R057
54
3
12
R010
13
R007
46
14
R032
5V
A1
TV01
33V
RV03
RV06
RD15 RD12
FB
TUNER
9
5V
8V
19
8V
24V12
4
8
1
7
LT01
SS05
3
2
3
RT03
8V TO SS05/4
1
RT01
5V
A10
1 8
C011
EEPROM
5V
A4
RV54
14
5V
TV05
RV57
8V
12
DV10
SS08
12V
8
RD45
24V
9
8
TDA1
RD44RD56
RD28RD40
7
4
1
771
A6A3
110V
16V
A9
10
Page 11
TRT
5. I2 BUS INTERCONNECTION DIAGRAM
PT 90 NEAT Service Manual
+5V
A7
A4
R012
R013
SDA
SDA
SDA
SCL
R049
SCL
SCL
R048
2019
6 5
u-CONTROLLER
EEPROM
A2
A1
SDA
SDA
TUNER
RV34
SCL
R
SCL
5
4
RV33
52
51
PROC.
VIDEO
11
Page 12
PT 90 NEAT Service Manual
Fuse
F1 defective
Voltage at drain
TP 01
Voltage at
IP01
PIN 11
< 1V
Start-up voltage
(6)
PIN 14
< 8V
Start-up voltage
varies ca. 8V
IP 01
Measure
+115V
adjustable with
VAP 01
Control range of
switched-mode
power supply
DP01 - 04
CP01 - 04
CP06, TP01
RP 07, RP 05
open and
short circuit
RP 06
RP 11, DP 07
TP 01
VAP 1, RP 03
YES
NO
YES
YES
NO
NO
NO
Switched mode power
supply defective, +110V
is missing or level is wrong
NO
YES
YES
YES
NO
6. FAULT TRACING DIAGRAM-POWER SUPPLY
12
Page 13
7. CHASSIS DIAGRAM
FRONT AV
PLL TUNER
TDA 7057
PT 90 NEAT Service Manual
2 X 2W
H.YOKE
BU508D
SCART
CVBS
AUDIO
DVD
BOARD
DVD
LOADER
RCIR
STV224X
ST92195
24C08
+5V
+110V
+12V
+16V
R G B
TDA1771
POWER
V.YOKE
13
Page 14
PT 90 NEAT Service Manual
8.SERVICE MENU AND BASIC ADJUSTMENTS
SERVICE MODE IS ACTIVED BY PRESSING THE DIGIT 1923
AT FEATURES MENU
8.1OPTION BYTES
OPTION 1: MODEL CONFIGURATION
b0: 1: L Avaialable 0: not available
b1: 1: APR ON 0: APR OFF
b2: 1: no Pin 8 16:9 switching mode0: Pin 8 16:9 switching mode
b3: 1: Turn on with AV button0: not used
b4: 1: Keyboard with menu 0: Keyboard without menu
b5: 1: Brightness half range available 0: Brightness full range available
b6:7 Main Tuner
b0:1: AV2 mode available0: not available
b1:1: SVHS mode available 0: not available
b2:1: Volume linear0: Volume Logaritmic
b3 1: Search mono audio ident available0: not available
b4: 1: DVD picture in SVHS mode 0: DVD picture in RGB mode
b5: 1: Headphone available 0: not available
b6: 1: No Subwoofer0: Subwoofer available
b7: 1: 4/3 Picture tube0: 16/9 Picture tube
OPTION 3: VIDEO/AUDIO FEATURE CONFIGURATION
b0:1: One Crystal application (4.43 Mhz)0:Two cystal application (for NTSC playback)
b1: 1: Intercarrier application 0: QSS application
b2: 1: STV2248E0: Normal video IC
b3: 1: OSD contrast control ON 0: OSD contrast control OFF
b4: 1: Blue screen enable0: disable
b5:1: AVC Automatic Volume Correction (MSP Stereo) AVL(Mono 22XX)
0: not available
b6: 1: DVD available0: not available
b7: 1: Standby after power on0: No Standby after power on
Reserved bits must be set to 0
You will need following equipments to carry out the adjustment procedures;
a- PLL Pattern generator for Secam L'
b- PLL Pattern generator PAL BG
c- Patern generator for white pattern
d- Color Analyzer (CA100)
14
Page 15
PT 90 NEAT Service Manual
8.2 GEOMETRY ADJUSTMENT
a. V.S 4/3 50H
b. V.S 16/9 50H
c. V.S 4/3 60H
d. V.S 16/9 60H
e. V.P
f. H.P
• Enter service menu and select the GEOMETRY settings
• Standart geometrical adjustments carried out by V.S, V.P and H.P settings. V.S 16/9 50h setting have to be carried
out until 3 cm distance between upper and lower parts of the screen.
• Same adjustments for 60H for 16/9 and 4/3.
• Press menu button to leave service menu
Menu button to leave service menu.
8.3 G2 ADJUST
> : <
increase normal decrease
Enter the G2 menu in the service mode
Turn the G2 potentiometer on FBT until you reach the : sign
< indicator means to decrease
> indicator means to increase
8.4 VIDEO
1 RED
2 GREEN
3 BLUE
4 RED COFF
5 GREEN COFF
• Apply Dark gray pattern (at 10 IRE)
• Contrast 70%, brightness middle, color saturation middle.
• By changing the R COF and G COF Adjust to obtain the necessary values for x and y.
• Apply white pattern (at 100 IRE)
• Set the contrast to 70%, brightness and color saturation to middle.
• Place the color analyzer.
• (R,G,B), it is possible to modify the peak white.
• Adjust to obtain the necessary values for x and y.
Remark: It may be necessary after low light alignment to check and to re-align the high light and to repeat several
times the procedure to obtain good alignment for both low and high light.
• 38.9 MHz PAL BG signal applied Tuner via tuner output (IF output).
• Leave the channel settings menu and enter service menu. Enter TUNER IF menu in the service mode.
Choose the PIF COARSE and PIF FINE item and adjust the setting until the : indicator (displayed as > : <)
turns in red color by pressing < and > on remote control.
• 33.9 MHz SECAM L' signal applied Tuner via tuner output.
• Leave the channel settings menu and enter service menu. Enter TUNE IF menu in the service mode.
Choose the PIF COARSE L’ and PIF FINE L’ item and adjust the setting until the: indicator
(displayed as > : < ) turns in red color by pressing < and > on remote control.
• Press Menu button to leave service menu.
8.6 HOTEL MODE
Installation and Child Lock Menus are omitted in Hotel Mode. You can not search any channel when the
Hotel Mode is activated.
Volume level cannot be increased higher then certain level in Hotel Mode. The volume limiting level is a predefined value in service menu.
Hotel mode activated from service menu.
8.7 SYSTEM VOLTAGE ADJUSTMENT
• Switch the TV in AV mode by pressing AV button on remote control unit. (Minimum beam current condition)
• Adjust the VAP2 potentiometer until 110Vdc measured on cathode pin of DP08 diode.
16
Page 17
PT 90 NEAT Service Manual
9. DVD MODULE
9.1 SAFETY AND HANDLING PRECAUTIONS
1. DO NOT use and store the Loader in dusty, high temperature or high humidity environments.
2. To avoid damage to the Loader by electrostatic dischargers, measuring equipment and operators should be
grounded during handling. The user of this unit takes all necessary precautions to avoid ESD (Electro-Static
Discharge) failures during handling and assembly of this unit into the end product.
3. Contamination of the PCB might influence the performance. Avoid fingerprints and stains on the PCB and
handle the Loader in a clean environment.
4. The mechanism of the Loader has been adjusted carefully during manufacturing. High shocks on this unit
may damage and should be avoided.
5. Fast heating (e.g. by bringing the Loader unit from a cold place into a warm and humid room) can result in
moisture condensing on the pickup lens, thus influencing the playability for a certain time. Before checking
the performance the Loader unit should be stabilized for at least 4 hours.
6. DO NOT disamble the loader to avoid ESD failures and to prevent from contamination.
AACCSSoouurrcceeSSuuppppllyy::
The Voltage Fluctuation : 110/220 V ± 10% tolerance
The Impulse Noise: 110/220 V ± 10% tolerance
Mean Time Between Failure (MTBF): Not less than 2,000 hours
Mean Time To Repair (MTTR): 0.5 hours
WWoorrkkiinnggEEnnvviirroonnmmeenntt
Temperature and Humidity
Operating temperature 5 – to 45 –
Storage temperature - 20 – to 60 –
Operating temperature varying 11–/hour(max)
Storage temperature varying 20–/hour(max)
Operating humidity 10% to 70%
Storage humidity 5% to 80%
Vibration
Reading data state0.2g 10-30Hz sine wave
Playing CD audio state 0.15g 10-30Hz random
Standby2.4g 10-30Hz random
Striking
Standby state100kg 6ms half sine-wave (in X,Y and Z directions)
Noise
Not more than 45dB in one meter away
18
Page 19
9.2 MECHANICAL AND ELECTRICAL
1. CONNECTORS
Integrated Connectors
1. DC power jack
2. IDE interface
3. Master/slave mode jumper set (not applicable as the loader configured for player)
4. Analog audio output (not applicable as the loader configured for player)
5. Digital Audio output (not applicable as the loader configured for player)
STV224X is a fully bus controlled IC for TV including PIF, SIF , Luminance , Chrominance and deflection processing. It is a
bus controlled PAL / SECAM / NTSC single chip TV Processor. For details of STV224X features please refer to the
STV224X datasheet. 110° , 4:3 or 16:9 CRT applications. It integrates both vertical deflection and E-W correction circuit
necessary for design of 110° chassis it allows designing a PAL/NTSC(BGDKIMN) set with very few external components
and no manual adjustment.
18SIFIN1SIFInput
29SIFIN2SIFInput
310AGCSIFCA PAG C SIF C apacitor
411V
512AGCPIFCAPAGC PIF Capacitor
613PIFIN1PIF Input
714PIFIN2PIF Input
816TUNERAGCOUTAGC Tuner Output
917IFPLLIF PLL Filter
1018GND
1119AM/FMOUT/SCAM/FM Mono Sound or Stereo Carriers Output
1220V
1321INTCVBSOUTInternal CVBS Output
1422EXT AUDIOINExternal Audio Input
1523PIFLC1LC Input
1624PIFLC2LC Input
1725V
1826CVBSIN1Internal Video Input
1927GN D 2Video/Luma Ground
2028CVBSIN2External Video Input
2129BSBlack Stretch Capacitor
2234Y/CVBSIN3Y(SVHS) or CVBS3 External Input
2335CHRChroma (SVHS) Input
-37UINB-Y Input
-38VINR-Y Input
-39YINYInput
-40YOUTY Output
-41VOUT R-YOutput
-42UOUT B-YOutput
3043BOUTBlue Output
3144GOUTGreen Output
3245ROUTRed Output
3346I
3447BOSDOSD Blue Input
3548GOSDOSD Green Input
3649ROSDOSD Red Input
3750FBO SD/HCOSD Fast BlankingInput / Half Contrast onSD IP56 package
3852XTAL3/BTUN3.5X M Hz C rystalorCloche FilterTuningC apac itor
3953XTAL23.5X MHz Crystal
4054XTAL 14.43 /3. 5X MHz Cryst al
4155CLPFChroma PLL Filter
4256X1/VAMP/CHROUT
REFIF
CCIF
CC2
CATH
IF
PT 90 NEAT Service Manual
SymbolDescriptionSTV224XC/8XCSTV223XD
Voltage Reference Filtering
IF Ground
5 V IF Supply
Video/Luma Supply Voltag e (8 V)
Cathode Current Measurement Input
XTAL1 Control Pin, Vertical Amplitude DAC Outpu
Chroma Reference Signal Output
39
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PT 90 NEAT Service Manual
PinN°
SDIP56TQFP64
4357GND1Chroma/Scanning Ground
-58CVBSOUT1Main Video Switch Output
4559V
4661BCL/SAF
4762VERTVertical Output Pulse
4863HOUTHorizontal Output Pulse
4964LFB/SSCLine Flyback Input and Super-Sandcastle Output
501SLPFScanning PLL Filter
512SCLI C Bus Clock Input
523SDAI C Bus Data Input
534V
545GNDDDigital Ground
556AUDIOOUTMain Audio Output
567FM CAPFM D em odulation Capacitor
CC1
CCD
SymbolDescriptionSTV224XC/8XCSTV223XD
Chroma/Scanning Power Supply (8 V)
Beam Current Limiter Control Voltage and Safety
(XRAY)
Digital Supply Voltage (5 V)
40
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PT 90 NEAT Service Manual
REXT/Cr
GEXT/Y
BEXT/Cb
FBEXT
CVBSOUT2
NTBC/CVBSOUT1
CVBSIN1
CVBSIN2
Y/CVBSIN3
CHR
FMCAP
INTCVBSOUT
BS
APR
24
27
26
RGB
HALF
25
28
21
44
29
18
20
22
TO YUV
CONTRAST
YUV
SWITCH
BLACK
STRETCH
MATRIX
SAT./CONT
LUMA DL
PEAKING
& CORING
APR
FBOSD/HC
37
3
ROSD
363534
TRAP
CHROMA
GOSD
RGB
CONTRAST
RGB
SWITCH
FM
SOUND BP
DEEMP.
FM DEMOD
23
56
13
BOSD
Mono
FILTER
TUNING
CATH
BCL/SAF
I
463332
SENSE
BCL/SAF
CATH
I
DRIVE
BRIGHT.
CUTOGG
BLANKING
ACC & ACC
OVERLOAD
AM
Mono
ROUT
GOUT
31
Sound
Subcarrier
BOUT
VERT
30
47
VERTICAL
SYNC.
DL
CHROMA
FILTER
BANDPASS
FILTER
CLOCHE
SCANNING
SEP
HOUT
48
2nd LOOP
HORIZONTAL
1st LOOP
HORIZONTAL
AUTO IDENT.
CLOCHE
VAM P DC
KILLER
DEMODULATOR
PAL/SECAM/NTSC
TUNING
LFB/SSC
49
SLPF
50
CONTROL
X1/VAMP/CHROUT
42
CLPF
41
XTAL1
XTAL2
XTAL3/BTUN
38111455
Mute
AM/FMOUT/SC
EXTAUDIOIN
AVL
Mute
IFPLL
PIFLC2
PIFLC1
9
16
15
AFC
W/B SPOT
INVERTER
PLL
Carrier
LIMITER
PLL Reference
VOLUME
AUDIO
AUDIOOUT
V
4
REF
REF
SCL
AGC
TUNER AGC
STV2248
7
PIFIN26PIFIN1
8
5
1
SIFIN12SIFIN2
AGCPIFCAP
AGC
3
AGCSIFCAP
53
V
CCD
IC BUS
54
10
54
45
43
V
CC1
GND1
17
CC2
V
IF
CCIF
V
GNDD
GND
SDA
5251
DECODER
19
GND2
TUNERAGCOUT
41
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PT 90 NEAT Service Manual
MAIN FEATURES
l I-C bus control (read and write modes),
l PIF PLL demodulator, Bus controlled VCO alignment,
l IF positive and negative modulation,
l Digital AFC,
l Tuner delayed AGC output,
l White and Black spot cancellation,
l SIF with QSS or intercarrier structure,
l Built in sound bandpass,
l Multistandard PLL FM demodulator (4.5, 5.5,
6.0,6.5MHz),
l AM demodulator for France,
l FM sound carriers output for Stereo chassis,
l Audio switch for external audio input, Mono chassis,
l Digital volume control,
l Audio Mute,
l Video switch, 3 CVBS inputs, 1 CVBS output which can
be used to drive teletext decoder,
l SVHS switch, Y input is combined with CVBS3 input,
l OSD RGB analog inputs, fast blanking detection on OSD
fast blanking pin, contrast control capability,oversize
blanking capability on OSD fast blanking input,
l External analog RGB inputs with contrast and saturation
control (external RGB matrixed in YUV).
l Integrated chroma filters (trap, bandpass, cloche) with
automatic alignment,
l Integrated luminance delay line,
l Adjustable peaking on the luminance signal with coring
function,
l Black strech circuit,
l PAL / SECAM / NTSC color decoder with automatic iden-
tification of standards,
l Integrated chroma delay line,
l Full integrated SECAM decoder,
l Hue control, two selectable matrixes in NTSC mode,
l Automatic flesh control circuit with two selectable charac-
teristics (normal and wide),
l ACC overload circuit,
l Chroma subcarrier output, which could be used to drive
comb filter circuit,
l Automatic RGB peak regulation (APR).
l Automatic digital cut-off current loop with warm-up detec-
tion circuit,
l White point and cut-off point adjustments,
l Beam current limiter control stage,
l High performance synchronization pulses separator,
l Horizontal synchronization with two phase locked loops,
l Integrated VCO, auto-calibration using the chroma crystal
reference frequency,
l Automatic time constant selection for the first PLL, 3
selectable time constants,
l Video identification circuit (independent from PLL1),
l Noise detector circuit,
l Vertical countdown circuit,
l Automatic 50/60Hz selection circuit,
l Blanking and inserted cut-off pulses position adapted to
standard (50 or 60Hz),
l Long blanking mode capability in 60Hz (same blanking as
50Hz standard),
l Possibility to insert cut-off pulses after a vertical oversize
blanking signal,
l De-interlace capability,
l Horizontal starting circuit with soft-start capability,
l Horizontal and vertical position adjustments, vertical
amplitude control voltage (combined with chroma subcarrier output),
l 4/3, 16/9 selection voltage.
42
Page 43
PT 90 NEAT Service Manual
m
V
m
ELECTRICAL CHAR ACTERISTICS
ABSOLUTE MA XIMUM RA TING S
SymbolParameterValueUnit
V
_8V
CC
V
CC
V
ESD
T
oper
T
stg
THE RM A L DA TA
8 V Supply Voltage10V
_5V
5 V Supply Voltage7V
Capacitor 100 pF discharged via 1.5 k serial resistance (Human Body Model)
±2
Operating Te m pe ra ture0, +70 °C
Storage Temperature-55, +150°C
kV
SymbolParameter
R
th (j-a)
Junction-ambient Thermal Resistance (measured at P
=1W)
D
SDIP5640°C/W
TQFP6450°C/W
Typical
Value
Unit
SUPPLY
(Supplies at T ypical Values, T
= 25° C, IC bus register at power-on res et value, auto
amb
mode, unless otherwise specified).
SymbolParameterTest ConditionsMin.TypMax.Unit
V
CCIF
V
CCD
V
V
I
CCIF
I
CC5F
I
CCI
I
CC2
P
CC1
CC2
IF Circuit Supply Voltage4.7555.25
Bus & Digital Supply Voltage4.7555.25
Chroma, Scanning Supply Voltage7.688.4
Video Supply Voltage7.688.4V
V
Current ConsumptionV
CCIF
V
Current ConsumptionV
CC5F
V
Current ConsumptionV
CCI
V
Current ConsumptionV
CC2
TotalPower Dissipation
D
= 5 V. No -l o ad at RGB outputs .58
CCIF
= 5 V. No-load at RGB outputs.48m
CCD
= 8 V. No-load at RGB outputs.40m
CCI
= 8 V. No-load at RGB outputs.56m
CC2
V
= V
CCI
V
CCIF =VCC5V
CC2
= 8 V,
= 5 V
1300mW
No-load at RGB out pu ts.
43
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PT 90 NEAT Service Manual
ST92195C/Dpos: IC01
48-96 KB ROM HCMOS MCU WITH ON-SCREEN DISPLAY AND
TELETEXT DATA SLICER
General Features:
•
Register File based 8/16 bit Core Architecture with RUN,
WFI, SLOW and HALT modes
•
0°C to +70°C Operating Temperature Range available
•
Up to 24 MHz Operation @ 5V±10%
•
Minimum instruction cycle time: 165nS at 24MHz.
•
48, 56, 64, 84 or 64K Bytes ROM
•
256 Bytes RAM of Register file (accumulators or index
registers)
•
256 to 512 Bytes of on-chip static RAM
•
2 or 8 Kbytes of TDSRAM (Teletext and Display Storage
RAM)
•
28 fully programmable I/O pins
•
Serial Peripheral Interface
•
Flexible Clock controller for OSD, Data Slicer and Core
clocks running from
a single low frequency external crystal.
•
Enhanced Display Controller with 26 rows of 40/80 char-
acters
– 2 sets of 512 characters
– Serial and Parallel attributes
– 10x10 dot Matrix, definable by user
– 4/3 and 16/9 supported in 50/60HZ and 100/120 Hz
mode
– Rounding, fringe, double width, double height,
scrolling, cursor, full Background color, half-intensity
color, translucency and half-tone modes
•
Teletext unit, including Data slicer, Acquisition Unit and
up to 8K Bytes RAM for Data Storage
•
VPS and Wide Screen Signalling slicer
•
Integrated Sync Extractor and Sync Controller
•
14-bit Voltage Synthesis for tuning reference voltage
•
Up to 6 External Interrupts plus one non-maskable inter-
rupt
•
8 x 8-bit programmable PWM outputs with 5V open-drain
or push-pull capability
•
16-bit Watchdog timer with 8-bit prescaler
•
1 or 2 16-bit standard timer(s) with 8-bit prescaler
•
I–C Master/Slave (on some devices)
•
4-channel A/D converter; 5-bit guaranteed
•
Rich instruction set and 14-Addressing modes
•
Versatile development tools, including Assembler, Linker,
C-Compiler, Archiver, Source Level Debugger and hardware emulators with Real-Time Operating System available from third parties
•
Pin Compatible EPROM and OTP devices available.
Microcontroller+OSD+(Teletext decoder)+VPS/PDC/WS
decoder are embedded in one chip, where there are two
types with the major difference;
ST92185 No-teletext
ST92195 With teletext
The ST92195 microcontroller is developed and manufactured by STMicroelectronics using a pro-prietary n-well
HCMOS process. Its performance derives from the use of
a flexible 256-register pro-gramming model for ultra-fast
context switching and real-time event response. The intelligent on-chip peripherals offload the ST9 core from I/O and
data management processing tasks allowing critical application tasks to get the maximum use of core resources.
The ST92195 MCU supports low power consumption and
low voltage operation for power-efficient and low-cost
embedded systems.
The advanced ST9+ Core consists of the Central Processing Unit (CPU), the Register File and the Interrupt controller. The general-purpose registers can be used as accumulators, index registers, or address pointers. Adjacent
register pairs make up 16-bit registers for addressing or
16-bit processing. Although the ST9 has an 8-bit ALU, the
chip handles 16-bit operations, including arithmetic,
loads/stores, and memory/register and memory/memory
exchanges. Two basic addressable spaces are available:
the Memory space and the Register File, which includes
the control and status registers of the on-chip peripherals.
Power consumption of the device can be reduced by more
than 95% (Low power WFI).
Up to 28 I/O lines are dedicated to digital Input/Output.
These lines are grouped into up to five I/O Ports and can
be configured on a bit basis under software control to provide timing, status signals, timer and output, analogue
inputs, external interrupts and serial or parallel I/O. A set
of on-chip peripherals form a complete system for TV set
and VCR applications:
– Voltage Synthesis
– VPS/WSS Slicer
– Teletext Slicer
– Teletext Display RAM
– OSD
44
Page 45
PT 90 NEAT Service Manual
c
BLOCK
DIAGRAM
NMI
INT[7:4]
INT2
INT0
OSCIN
OSCOUT
RESET
RESETO
SDO/SDI
SCK
MCFM
VSO[2:1]
STOUT0
DA1/SCL1
DA2/SCL2
Up to 96
Kbytes ROM
256 or 512
bytes RAM
Up to 8
Kbytes
TDSRAM
256 bytes
Register File
Interrupt
Management
ST9+ CORE
WATCHDOG
TIMING AND
CLOCK CTRL
VOLTAGE
SYNTHESIS
STANDARD
TIMER
TRI
8/16-bit
CPU
MMU
RCCU
16-BIT
TIMER/
SPI
1)
2)
IC
I/O
PORT 0
I/O
PORT 2
I/O
PORT 3
I/O
PORT 4
I/O
MEMORY BUS
REGISTER BUS
PORT 5
DATA
SLICER
& ACQUI-
SITION
UNIT
SYNC.
EXTRAC-
TION
VPS/WSS
DATA
SLICER
ADC
SYNC
CONTROL
ON
SCREEN
DISPLAY
PWM
D/A CON-
VERTER
MULTIP.
8
6
4
8
2
FREQ.
P0[7:0]
P2[5:0]
P3[7:4]
P4[7:0]
P5[1:0]
TXCF
CVBS1
WSCR
WSCF
CVBS2
AIN[4:1]
EXTRG
VSYNC
HSYNC/CSYNC
CSO
PXFM
R/G/B/FB
TSLU
HT
PWM[7:0]
All alternate functions(Italic characters) are mapped on Ports 0, 2, 3, 4 and 5
Note 1: One standard timer on ST92195C devices, two standard timers on ST92195D devi
Note 2: IC available on ST92195D devices only
45
Page 46
PT 90 NEAT Service Manual
o
o
F
t
t
t
t
PIN DESCRIPTION (Cont’d)
Figure 3. 56-Pin Package Pin-Out
RESET
INT7/P2.0
RESET
AIN4/P0.2
CSO/RESET0
SDA1/SDI/SDO/P5.1
SCL1/SCK/INT2/P5.0
WSCF
V
/WSCR
PP
AVDD3
TEST0
MCFM
Reset (input, active low). The ST9+ is ini-
P0.7
P0.6
P0.5
P0.4
P0.3
P0.1
P0.0
/P3.7
P3.6
P3.5
P3.4
FB
V
DD
JTDO
JTCK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
B
16
G
17
R
18
19
20
21
22
23
24
25
26
27
28
tialised by the Reset signal. Wi th the d eactivation
of RESET, program execution begins from the
Program memory location pointed to by the vector
contained in program mem ory locations 00h and
01h.
R/G/B Red/Green/Blue. Video color analog DAC
outputs.
FB Fast Blanking. Video analog DAC output.
V
Main power supply voltage (5V±10%, digital)
DD
WSCF, WSCR Analog pins for the VPS/WSS slic-
er . These pins must be tied to ground or not connected.
V
: On EPROM/OTP devices, the WSCR pin is
PP
replaced by V
pin. V
should be tied to GND in user mode.
PP
which is the programming voltage
PP
MCFM Analog pin for the displa y pixel frequency
multiplier.
OSCIN, OSCOUT Oscillator (input and output).
These pins connect a parallel-resonant crystal
(24MHz maximum), or an external source to the
on-chip clock oscillator and buffer. OSCIN is the
input of the oscillator inverter and internal clock
generator; OSCOUT is the output of the oscillator
P2.1/INT5/AIN1
56
P2.2/INT0/AIN2
55
P2.3/INT6/VS01
54
P2.4/NMI
53
P2.5/AIN3/INT4/VS02
52
OSCIN
51
OSCOUT
50
P4.7/PWM7/EXTRG/STOUT0
49
P4.6/PWM6
48
P4.5/PWM5/SDA2
47
P4.4/PWM4/SCL2
46
P4.3/PWM3/TSLU/HT
45
P4.2/PWM2
44
P4.1/PWM1
43
P4.0/PWM0
42
VSYNC
41
HSYNC/CSYNC
40
AVDD1
39
PXFM
38
37
JTRSTO
GND
36
AGND
35
CVBS1
34
CVBS2
33
JTMS
32
AVDD2
31
CVBSO
30
29
TXCF
VSYNC Vertical Sync. Vertical video synchr
tion input to OSD. Positive or negative
HSYNC/CSYNC Horizontal/Composite sync. Hori-
zontal or composite video synchronisati
OSD. Positive or negative polarity.
PXFM Analog pin for the Display Pixel
Multiplier
AVDD3 Analog V
to V
externa lly .
DD
GND Digital circuit ground.
AGND Analog circuit ground (must be ti
nally to digital GND).
CVBS1 Composite video input signal for
text slicer and sync extraction.
CVBS2 Composite video input signal for
WSS slicer. Pin AC coupled.
AVDD1, AVDD2 Analog power supplies (mus
tied externally to AVDD3).
TXCF Anal og pin for the Teletext slicer
CVBSO, JTDO, JTCK Test pins: leave float
TEST0 Test pins: must be tied to AVDD2.
JTRST0 Test pin: must be tied to GND.
inverter.
of PLL. This pin m ust be
DD
46
Page 47
PIN ASSIGNMENT
PPiinnNNoo..PPiinnNNaammeeII//OOFFuunnccttiioonn
1INT7/P2.0IR INT. IN
3P0.7DVDDATAOUT
4P0.6STOP
5P0.5N.C.
6P0.4N.C.
7P0.3N.C.
8AIN4AV.STATUS
9P0.1N.C.
10P0.0N.C.
11CSO/RESET0/P3.7MUTE_DVD
12P3.6L/L'
13P3.5TV/DVD
14P3.4STDBY
28JTCKN.C.
30CVBSON.C.
32JTMSN.C.
42P4.0/PWMODVD_STD_BY
43P4.1/PWM1VOL
44P4.2/PWM2N.C.
45P4.3/PWM3DVD POWER +5V
46P4.4/PWM4DVD POWER +12V
47P4.5/PWM5N.C.
48P4.6/PWM6N.C.
49P4.7/PWM7/EXTRG/STOUTN.C.
53P2.4/NMIN.C.
54P2.3/INT6/VS01LED CONTROL
55P2.2/INT0/AIN2DVDDATAIN
56P2.1/INT5/AIN1KEYBOARD INPUT
PT 90 NEAT Service Manual
47
Page 48
PT 90 NEAT Service Manual
24C08 pos: IC02
Non-Volatile Memory
These I_C-compatible electrically erasable programmable memory (E_PROM) is organized as 1024 x 8 bit and operate
with a power supply of 5 V. The memory behaves as a slave device in the I_C protocol, with all memory operations synchronized by the serial clock. Read and Write operations are initiated by a START
condition, generated by the bus master. The START condition is followed by a Device Select Code and RW bit terminated
by an acknowledge bit.
DC Characteristics
= 0 to 70°C, –20 to 85°C or –40 to 85°C; VCC = 3V to 5.5V, 2.5V to 5.5V or 1.8V to 5.5V
(T
A
SymbolParameterTest ConditionMinMaxUnit
I
I
I
I
I
I
I
CC
CC1
CC2
CC3
CC4
V
V
V
V
LI
LO
IL
IH
IL
IH
Input Leakage Current0V≤ VIN≤ V
Output Leakage Current
Supply Current (ST24 series)
Supply Current (ST25 series)V
Supply Current (Standby)
(ST24 series)
Supply Current (Standby)
(ST25 series)
Supply Current (Standby)
(ST24C08R)
Supply Current (Standby)
(ST24C08R)
0V ≤ V
SDA in Hi-Z
V
= 5V, fC = 100kHz
CC
(Rise/Fall time < 10ns)
= 2.5V, fC = 100kHz1mA
CC
= VSS or VCC,
V
IN
V
CC
V
= VSS or VCC,
IN
= 5V, fC = 100kHz
V
CC
V
= VSS or VCC,
IN
V
CC
V
= VSS or VCC,
IN
V
= 2.5V, fC = 100kHz
CC
= VSS or VCC,
V
IN
V
CC
V
= VSS or VCC,
IN
V
= 3.6V, fC = 100kHz
CC
V
= VSS or VCC,
IN
V
CC
V
= VSS or VCC,
IN
V
= 1.8V, fC = 100kHz
CC
CC
≤ V
OUT
= 5V
= 2.5V
= 3.6V
= 1.8V
CC
Input Low Voltage (SCL, SDA)–0.30.3 VCCV
Input High Voltage (SCL, SDA)0.7 VCCVCC + 1V
Input Low Voltage
(E, PRE, MODE,
WC)
Input High Voltage
(E, PRE, MODE,
WC)
–0.30.5V
V
– 0.5VCC + 1V
CC
±2µA
±2µA
2mA
100µA
300µA
5µA
50µA
20µA
60µA
10µA
20µA
Output Low Voltage (ST24 series)I
V
OL
Output Low Voltage (ST25 series)I
Output Low Voltage
(ST24C08R)
= 3mA, VCC = 5V0.4V
OL
= 2.1mA, VCC = 2.5V0.4V
OL
= 1mA, VCC = 1.8V0.3V
I
OL
48
Page 49
PT 90 NEAT Service Manual
TDA1771pos: ID41
VERTICAL DEFLECTION CIRCUIT
DESCRIPTION
The TDA1771 is a monolithic integrated circuit in SIP10 package.
It is a full performance and very efficient vertical deflection circuit intended for direct drive of a TV picture tube in Color and
B & W television as well as in Monitor and Data displays.
RAMP GENERAT OR
INDEPENDENT AMPLI TUDE ADJUSTEMENT
BUFFER STAGE
POWER AMPLIFIER
FLYBACK GENERA T O R
INTERNAL REFE RENC E VOLTAGE
THERM AL PROTECTION
SIP10
(Plastic Package)
ORDER CODE : TDA1771
PIN CONNECTIONS (top view)
SCRIPTION
e TDA1771 is a monolithic i ntegrated circuit in
P10 package.
is a full performance and very efficient vertical
flection circuit intended for direct drive of a TV
cture tube in Color and B & W television as well
in Monitor and Data displays.
OCK DIAGRAM
9
VOLTAGE
REGULATOR
R3
FLYBACK
GENERATOR
10
9
8
7
6
5
4
3
2
1
2
FLYBACK GENERATOR
V
S
INVERTING INPUT
BUFFER OUTPUT
RAMP GENERATOR
GROUND
HEIGHT ADJUSTMENT
TRIGGER INPUT
OUTPUT STAGE V
POWER OUTPUT
10
S
1771-01.EPS
TRIGGER IN
3
467 85
RAMP
GENERATOR
BUFFER
STAGE
CLOCK
PULSE
POWER
AMP.
THERMAL
PROTECTION
49
1
-02.EPS
Page 50
PT 90 NEAT Service Manual
V
.
ABSOLUTE MAXIMUM RATINGS
SymbolParameterValueUnit
V
, V2Flyback Peak Voltage65V
V
1
V
V
I
I
I
10
I
10
P
, TJStorage and Junction Temperature– 40, + 150°C
T
S
Supply Voltage30V
S
Trigger Input Voltage20V
3
Amplifier Input VoltageGND to VSV
8
Output Peak to Peak Current (non repetitive t = 2ms)6
0
Output Peak to Peak Current t > 10µs4A
0
Pin 10 DC Current at V
Pin 10 Peak to Peak Current @ t
Total Power Dissipation @ T
Reference Voltage– I
Reference Voltage Drift Versus VSVS = 10V to 30V12mV/V
Reference Voltage Drift Versus I4I4 = 10µA to 30µA1.52mV/µA
Internal Ref. Voltage4.264.404.54
= 0, I10 = 01636mA
1
= 0, I10 = 01530mA
1
= 00.5µA
6
= 20µA0.21%
4
= 30kΩ, Rb = 10kΩ, VS = 30V17.017.818.6V
a
= 6.8kΩ, Rb = 10kΩ, VS = 15V7.27.57.8V
R
a
= 0.5A0.51V
1
= 1.2A11.4V
I
1
= 1.2A1.62.2V
– I
1
= 20µA6.36.66.9V
4
GvOuput Stage Open Loop Gainf = 100Hz60dB
V
V
fs
V
10
V
3
I
3
t
3
Notes : 1. The trigger input circuit can accept, with a metal option, positive and negative going input pulses
Operating Supply Voltage Range1030
Peak-to-peak Operating Current Range0.42.5
Supply CurrentIY = 2.4A
Flyback VoltageIY = 2.4A
pp
pp
315mA
51V
Sawtooh Pedestall Voltage1.85
Junction Temp. for Thermal Shutdown145°C
APPLICATION CIRCUIT
+V
S
0.1µF470
9
VOLTAGE
REGULATOR
R3
µ
F
GENERATOR
2
FLYBACK
1N4001
100µF
35V
10
1771-04.TBL
TRIGGER IN
3
467 85
180k
Ω
220k
Ω
RAMP
GENERATOR
BUFFER
STAGE
47nF
CLOCK
PULSE
POWER
AMP.
PROTECTION
THERMAL
1
1.2k
Ω
2.2Ω
0.22µF
1k
22µF
2.4k
Ω
330
Ω
Ω
1.2
YOKE
1500µF
Ω
Ω
Ry = 9.6
Ly = 24.6mH
Iy = 1.2App
1771-03.EPS
51
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PT 90 NEAT Service Manual
TDA 16846pos: IP01
Controller for Switch Mode Power Supplies Supporting Low Power
Standby and Power Factor Correction
Features
•
Line Current Consumption with PFC
•
Low Power Consumption
•
Stable and Adjustable Standby Frequency
•
Very Low Start-up Current
•
Soft-Start for Quiet Start-up
•
Free usable Fault Comparators
•
Synchronization and Fixed Frequency Facility
•
Over- and Undervoltage Lockout
•
Switch Off at Mains Undervoltage
•
Temporary high power circuit (only TDA 16847)
•
Mains Voltage Dependent Fold Back Point Correction
•
Continuous Frequency Reduction with Decreasing
Load
•
Adjustable and Voltage Dependent Ringing Suppression Time
Description
The TDA 16846 is optimised to control free running or
fixed frequency flyback converters with or without Power
Factor Correction (Current Pump). To provide low power
consumption at light loads, this device reduces the
switching frequency continuously with load, towards an
adjustable minimum (e. g. 20 kHz in standby mode).
Additionally, the start up current is very low. To avoid
switching stresses of the power devices, the power transistor is always switched on at minimum voltage. A special circuit is implemented to avoid jitter. The device has
several protection functions: V CC over- and undervoltage, mains undervoltage, current limiting and 2 free
usable fault comparators. Regulation can be done by
using the internal error amplifier or an opto coupler feedback (additional input). The output driver is ideally suited
for driving a power MOSFET, but it can also be used for
a bipolar transistor. Fixed frequency and synchronized
operation are also possible. The TDA 16846 is suited for
TV-, VCR- sets and SAT receivers. It also can be good
used in PC monitors. The TDA 16847 is identical with
TDA 16846 but has an additional power measurement
output (pin 8) which can be used for a Temporary High
Power Circuit.
Pin Configuration (top view)
U
DTC
PCS
RZI
SRC
OCI
FC2
SYN
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
OUT
GND
PVC
FC1
REF
N.C./PMO
Pin Definitions and Functions
PinSymbolFunction
1OTCOff Time Circuit
2PCSPrimary Current Simulation
3RZIRegulation and Zero Crossing Input
4SRCSoft-Start and Regulation Capacitor
5OCIOpto Coupler Input
6FC2Fault Comparator 2
7SYNSynchronization Input
8N.C./PMONot Connected (TDA16846)
9REFReference Voltage and Current
10FC1Fault Comparator 1
11PVCPrimary Voltage Check
12GNDGround
13OUTOutput
14VCCSupply Voltage
52
Page 53
Short Description of the Pin Functions
PinFunctions
1A parallel RC-circuit between this pin and ground determines the ringing suppression time
and the standby-frequency.
2A capacitor between this pin and ground and a resistor between this pin and the positive
terminal of the primary elcap quantifies the max. possible output power of the SMPS.
3This is the input of the error amplifier and the zero crossing input. The output of a voltage
divider between the control winding and ground is connected to this input. If the pulses at
pin 3 exceed a 5 V threshold, the control voltage at pin 4 is lowered.
4This is the pin for the control voltage. A capacitor has to be connected between this pin
and ground. The value of this capacitor determines the duration of the softstart and the
speed of the control.
PT 90 NEAT Service Manual
5If an opto coupler for the control is used, it's output has to be connected between this pin
and ground. The voltage divider at pin 3 has then to be changed, so that the pulses at pin
3 are below 5 V.
6Fault comparator 2: If a voltage > 1.2 V is applied to this pin, the SMPS stops.
7If fixed frequency mode is wanted, a parallel RC circuit has to be connected between this
pin and ground. The RC-value determines the frequency. If synchronized mode is wanted,
sync pulses have to be fed into this pin.
8Not connected (TDA16846). / This is the power measurement output of the Temporary
High Power Circuit. A capacitor and a RC-circuit has to be connected between this pin
and ground.
9Output for reference voltage (5 V). With a resistor between this pin and ground the fault
comparator 2 (pin 6) is enabled.
10Fault comparator i: If a voltage > 1 V is applied to this pin, the SMPS stops.
11This is the input of the primary voltage check. The voltage at the anode of the primary
elcap has to be fed to this pin via a voltage divider. If the voltage of this pin falls below
1 V, the SMPS is switched off. A second function of this pin is the primary voltage dependent fold back point correction (only active in free running mode).
12Common ground.
13Output signal. This pin has to be connected across a serial resistor with the gate of the
power transistor.
14Connection for supply voltage and startup capacitor. After startup the supply voltage is
produced by the control winding of the transformer and rectified by an external diode.
53
Page 54
PT 90 NEAT Service Manual
TDA16846 Block Diagrams
PVC
SYN
OTC
RZI
SRC
OCI
5V
1
3
4
5
3.5V
CS1
D
R
30kΩ
R
75kΩ
Limit
5V
3
D
4
7
8
Control Voltage
Off Time
Comparator
5V
Amplifier
Control Voltage
KSY
∞
+
R
15kΩ
∞
+
-
Eror
∞
+
-
Buffer for
∞
+
+
-
R
4
3
RSTC/RSTF
R
D
2
G4
11
Primary
Voltage
Check
∞
+
V
CC
9
REF
8
N.C.
1
∞
FC2
6
+
–
FC2
1.2V
Fold Back Point Correction
R6x1/3
R
6
1.5V
G1
1
2
PVA
-
+
ED2
Error-
Flipflop
S
R
D5
∞
1V
–
3.5V
+
Q
R
1
20kΩ
5V
2
PCS
D1
Startup
Diode
14
V
CC
12
GND
1)
The input with the lower voltage becomes operative
16V
1.5V
On Time
Comparator
∞
+
ED1
<25mV
Overvoltage
Comparator
∞
+
-
&
S
G2
I
1
Zero Crossing
Signal
Supply Voltage
Comparator
15.8V
+
-
Q
R
∞
G3
1V
Output
Driver
&
FC1
∞
13
OUT
-
+
10
54
Page 55
PT 90 NEAT Service Manual
TDA7057AQ
2 x5 W stereo BTL Audio Output Amplifier with DC Volume Control
FEATURES
• DC volume control
• Few external components
• Mute mode
• Thermal protection
• Short-circuit proof
• No switch-on and switch-off clicks
• Good overall stability
• Low power consumption
• Low HF radiation
• ESD protected on all pins.
GENERAL DESCRIPTION
The TDA7057AQ is astereo BTL output amplifier with DC
volume control. The device is designed for use in TV and
monitors, but are also suitable for battery-fed portable
recorders and radios.
Missing Current Limiter (MCL)
A MCL protection circuit is built-in. The MCL circuit is
activated when the difference in current between the
output terminal of each amplifier exceeds 100 mA (typical
300 mA). This level of 100 mA allows for headphone
applications (single-ended).
(1) This capacitor can be omitted if the 220µF electrolytic capacitor is connected close to pin 5.
(2) RL=16Ω.
FUNCTIONAL DESCRIPTION
The TDA7057AQ is a stereo output amplifiers with two
DC volume control stages. The device is designed for TV
and monitors, but also suitable for battery-fed portable recorders and radios.
In conventional DC volume control circuits the control or
input stage is AC coupled to the output stage via external
capacitors to keep the offset voltage low.
In the TDA7057AQ the two DC volume control stages are
integrated into the input stages so that no coupling capacitors are required and a low offset voltage is still maintained. The minimum supply voltage also remains low.
The BTL principle offers the following advantages:
• Lower peak value of the supply current
• The frequency of the ripple on the supply voltage is twice the signal frequency.
Consequently, a reduced power supply with smaller capa
citors can be used which results in cost reductions.
For portable applications there is a trend to decrease the
supply voltage, resulting in a reduction of output power at
conventional output stages. Using the BTL principle increases the output power.
The maximum gain of the amplifier is fixed at 40.5 dB.
The DC volume control stages have a logarithmic control
characteristic. Therefore, the total gain can be controlled
from +40.5 dB to -33 dB. If the DC volume control voltage
falls below 0.4 V, the device will switch to the mute mode.
The amplifier is short-circuit protected to ground, Vp and
across the load. A thermal protection circuit is also implemented. If the crystal temperature rises above 150 oC the
gain will be reduced, thereby reducing the output power.
Special attention is given to switch-on and switch-off
clicks, low HF radiation and a good overall stability.
56
Page 57
74HC4053Bpos:IA03
h
p
Analog Multiplexer/Demultiplexer
4053B
.
QUIESCE NT CURREN T SPECIFIED TO 20V
FOR HCC DEVICE
.LOW ”ON” RESISTANCE : 125Ω (typ.) OVER
15V p.p. SIGNAL-INPUT RANGE FOR V
VEE= 15V
DD
-
EY
(PlasticPackage)F(CeramicFritSealPackage)
.HIGH ”OFF” RESISTANCE : CHANNEL LEAK-
AGE ± 100pA (typ.) VDD– VEE= 18V
.
BINARY ADDRESS DECODING ON CHIP
.
VERY LOW QUIESCENT POWER DISSIPATION UNDER ALL DIGITAL CONTROL INPUT
AND SUPPLY CONDITIONS : 0.2 µW (typ.),
VDD– VSS=VDD– VEE= 10V
.
MATCHED SWITCH CHARACTERISTICS :
R
=5Ω (typ.)for VDD– VEE= 15V
ON
M1
(MicroPackage)C1(PlasticChipCarrier)
ORDERCODES:
HCC40XXBFHCF40XXBM1HCF40XXBEYHCF40XXBC1
.WIDE RANGEOF DIGITALAND ANALOG SIG-
NAL LEVELS : DIGITAL3 TO 20V,ANALOG TO
20V p.p.
.5V, 10V,AND 15V PARAMETRIC RATINGS
.INPUT CURRENT OF 100mA AT 18V AND
25ϒC FOR HCC DEVICE
.
100% TESTEDFOR QUIESCENTCURRENT
.MEETS ALLREQUIREMENTSOFJEDECTEN-
TATIVE STANDARD N
SPECIFICATIONS FOR DESCRIPTION OF ”B”
SERIES CMOS DEVICES”
o
13A, ”STANDARD
DESCRIPTION
TheHCC 4051B, 4052B and4053B (extendedtem-
perature range) andHCF4051B, 4052B and4053B
(intermediate temperature range) are monolit
tegrated circuits, available in 16-lead dua
plastic or ceramic package and plastic micro
age. HCC/HCF4051B,HCC/HCF4052B,andHCC/HCF4053Banalogmultiplexers/demult
plexers are digitally controlled analog switc
ing low ON impedance and very low OFF leakage
PT 90 NEAT Service Manual
FUNCTIONAL DIAGRAMS AND TRUTH TABLES (continued)
4053
Inh ibit
00ax or bx or cx
01ay or by or cy
1XNone
X=Don’t care.
AorB
or C
57
Page 58
PT 90 NEAT Service Manual
LM317 pos: IP02
1.2V TO 37V Voltage Regulator
GENERAL DESCRIPTION
The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A
over a 1.2V to 37V output range. They are exceptionally
easy to use and require only two external resistors to set
the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, the
LM117 is packaged in standard transistor packages
which are easily mounted and handled.
In addition to higher performance than fixed regulators,
the LM117 series offers full overload protection available only in IC’s. Included on the chip are current limit,
thermal overload protection and safe area protection. All
overload protection circuitry remains fully functional
even if the adjustment termi-nal is disconnected.
Normally, no capacitors are needed unless the device is
situ-ated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An optional output capacitor can be added to improve transient
response. The adjustment terminal can be bypassed to
achieve very high ripple rejection ratios which are difficult to achieve with stan-dard 3-terminal regulators.
Besides replacing fixed regulators, the LM117 is useful
in a wide variety of other applications. Since the regulator is “floating” and sees only the input-to-output differential volt- age, supplies of several hundred volts can
be regulated as long as the maximum input to output differential is not ex-ceeded, i.e., avoid short-circuiting the
output. Also, it makes an especially simple adjustable
switching regulator, a programmable output regulator,
or by connecting a fixed resistor between the adjustment pin and output, the LM117 can be used as a precision current regulator. Sup-plies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the out-put to 1.2V
where most loads draw little current. For applications requiring greater output current, see LM150 series (3A)
and LM138 series (5A) data sheets. For the negative
complement, see LM137 series data sheet.
FEATURES
l Guaranteed 1% output voltage tolerance (LM317A)
l Guaranteed max. 0.01%/V line regulation (LM317A)
l Guaranteed max. 0.3% load regulation (LM117)
l Guaranteed 1.5A output current
l Adjustable output down to 1.2V
l Current limit constant with temperature
l P + Product Enhancement tested
l 80 dB ripple rejection
l Output is short-circuit protected
These circuits consist of two independent, high gain, internally frequency compensated which were designed specifically to operate from a single power supply over a wide
range of voltages. The low power supply drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, dc gain blocks
PIN CONNECTIONS
1
2
-
+
3
1 - Output 1
2 - Invertin g inp ut 1
3 - Non-inver ti ng input 1
-
4 - V
CC
and all the conventional op-amp circuits, which now can be
more easily implemented in single power supply systems.
For example, these circuits can be directly supplied with
the standard + 5V, which is used in logic systems and will
easily, provide the required interface electronics without
requiring any additional power supply. In the linear mode
the input common-mode voltage range includes ground
and the output voltage can also swing to ground, even
The MC78XX/LM78XX/MC78XXA series of three terminal positive regulators are available in the TO-220/DPAK package and with several fixed output voltages,
making them useful in a wide range of applications.
Each type employs internal current limiting, thermal
shutdown and safe operating are protection, making it
essentially indestructible. If adequate heat sinking is
provided, they can deliver over 1 A output current.
Although designed primarily as fixed voltage regulators,
these devices can be used with external components to
obtain adjustable voltages and currents.
59
Page 60
PT 90 NEAT Service Manual
DESCRIPTION OF INTEGRATED CIRCUITS
ES6018
DVD PROCESSOR SOLUTION
-DVD PART-
DESCRIPTION
Built on ESS’s proprietary and flexible Programmable Multimedia Processor architecture, the Vibratto TM series of
DVD processors combine audio/video stream data processing, system control and housekeeping functions, video postprocessing, and display format encoding, enabling various
DVD-based multimedia electronics to be built with minimal
external components. The Vibratto series includes new features for DVD-Audio support, progressive scan video output, and built-in TV encoder and video DACs.
All of the Vibratto DVD processors each include two parallel
processing units, a RISC processor, a vector engine, and
supplemental hardware resources for implementing specialized encoding and decoding tasks in the device architectures. All of these resources are interconnected with two
separate data buses, each with its own DMA unit and interface to external memory. The processing units enable
simultaneous parallel execution of system commands and
data processing.
Both the RISC processor and vector engine are independently programmable. Each has its own on-chip cache
memory. The RISC processor and its associated hardware
units perform bit stream parsing, control audio data output,
transfer video and audio data to the vector engine and service system control and housekeeping functions. The vector
engine and associated hardware units perform audio and
video microcode processing required by A/V standards such
as Dolby Digital TM, DTS TM, MPEG and JPEG. These
processing tasks include audio DSP, video motion compensation and estimation, loop filtering, discrete cosine transforms (DCT) and inverse DCT, quantization and inverse
quantization.
The Vibratto DVD processors support both JPEG/MP3
audio playback and the Kodak PictureCD JPEG display format. These new features allow Picture CDs created with
images and voiceovers from digital cameras to be enjoyed
in a DVD player or Home Theater System. All of the Vibratto DVD processors support both parallel and serial DVD
loader interfaces for system MPEG A/V data stream input,
industry standard-I 2 S bus for audio data input and output,
direct system EPROM and SDRAM access for high-speed
command fetching and audio/video data buffering and processing. The Vibratto DVD processors are available in 208pin Plastic Quad Flat Pack (PQFP) device packages.
FEATURES
• Dedicated core and I/O power supplies for low-power
operation; integrated 32-bit RISC processor for system
host, eliminating requirements of an external host CPU
• Supports DVD-Video, DVD-Audio, VideoCD 1.1, 2.0, and
3.0, Super VideoCD (SVCD), CD-DA, MP3, and Kodak
Picture-CD
• Supports parallel and serial interfaces to ATAPI, Compact
Flash, DCI, IDE and UDF DVD loaders
• Direct interface of 8- or 16-bit SDRAM of up to 128-Mb
capacity at a variety of speed grades
• Direct interface of up to 4 banks of 8- or 16-bit EPROM or
Flash EPROM; automatic firmware updating of Flash
EPROM through DVD loader
Video
• Built-in NTSC/PAL encoder includes field-adaptive de
interlacing for progressive scan video output for clearer
and more stable display (ES6028 and ES6038 Only)
• Macrovision 7.1 and Macrovision AGC 1.03 compliant
video outputs for 480-pixel progressive scan and for
NTSC/PAL interlaced video
• Four built-in 10-bit Video DACs provide simultaneous
video outputs of composite and S-video, or composite and
YUV; supports selectable 8-bit CCIR 601 4:2:2 YUV outputs
• 8-bit On-Screen Display (OSD) controller with 3-bit blending provides display with 256 colors in 8 degrees of transparency
• On-chip Subpicture Unit (SPU) decoder supports karaoke
lyric, subtitles, and EIA-608 compliant Line 21 Captioning
• Video error concealment, motion zoom and pan and
NTSC to PAL and PAL to NTSC conversion supported
Audio
• Dolby Digital (AC-3), DVD-Audio, Pro Logic, DTS, MPEG1 layer 2 and 3 Audio (MP3), and High-Definition Compat-
ible Digital.... (HDCD) decoding
• On-chip Dolby Digital (AC-3) and DTS 5.1 channel decoding and output (ES6018/28/38 Only)
• Dolby Digital and DTS S/PDIF digital audio output.
• Dolby Digital Class A, DTS, and HDCD certified
• Meridian Lossless Packing.... (MLP) decoding and Linear
121, 139, 172
RESET#24IReset input, active low.
TDMDX
RSELIROM Select.
25
TDMDR28ITDM receive data.
TDMCLK29ITDM clock input.
TDMFS3 0ITDM frame sync.
TDMTSC#31OTDM output enable.
TWS
SEL_PLL2ISystem and DSCK output clock frequency selection is made at the
II/O power supply.
IGround.
ODevice address output.
ICore power supply.
OTDM transmit data.
RSELSelection
016-bit ROM
18-bit ROM
OAudio transmit frame sync.
RESET#. The matrix belo w list s the available clock frequencies a
PLL bit settings.
32
TSD0
SEL_PLL0IRefer to the description and matrix for SEL_PLL2 pin 32.
33
TSD1
SEL_PLL1IRefer to the description and matrix for SEL_PLL2 pin 32.
36
OAudio transmit serial data port 0.
OAudio transmit serial data port 1.
SEL_PLL2SEL_PLL1SEL_PLL0 Clock Type
000VCO off.
001DCLK
010Bypass mode
011DCLK x 2
100DCLK x 4.5
101DCLK x 3
110DCLK x 3.5z
111DCLK x 4
TSD[2]37OAudio transmit serial data output 2.
TSD[3]38OAudio transmit serial data output 3.
62
Page 63
Table 1 ES60x8 Pin Description (Continued)
NameNumberI/ODefinition
MCLK39I/OAudio master clock for audio DAC.
TBCK40OAudio transmit bit clock.
SPDIF
SEL_PLL3IClock source select.
41
NC42, 48No connect pins. Leave open.
RSD45IAudio receive serial data.
RWS46IAudio receive frame sync.
RBCK47IAudio receive bit clock.
XIN49ICrystal input.
XOUT50OCrystal output.
AVEE51IAnalog power for PLL.
DMA[11:0]66:61, 58:53ODRAM address bus [11:0].
DCAS#69ODRAM column address strobe.
DOE#70ODRAM output enable.
DSCK_ENODRAM clock enable.
DWE#71ODRAM write enable.
DRAS#72ODRAM row address strobe.
DMBS073OSDRAM bank select 0.
DMBS174OSDRAM bank select 1.
DB[15:0]96:93, 90:85,
Y: Luma component for YUV and Y/C processing.
C: Chrominance signal for Y/C processing.
U: Chrominance component signal for YUV mode.
V: Chrominance component signal for YUV mode.
63
Page 64
PT 90 NEAT Service Manual
1
1
1
Table 1 ES60x8 Pin Description (Continued)
NameNumberI/ODefinition
YUV1107OYUV1 pixel output data.
VREFIInternal voltage reference to video DAC. Bypass to ground with ∝F capacitor.
YUV2
CDACOVideo DAC output. Refer to description and matrix for UDAC pin
YUV3109OYUV3 pixel output data.
COMPICompensation input. Bypass to ADVEE with 0.1∝F capacitor.
YUV4110OYUV4 pixel output data.
RSETIDAC current adjustment resistor input.
ADVEE111IAnalog power for video DAC.
YUV5113OYUV5 pixel output data.
YDACOVideo DAC output. Refer to description and matrix for UDAC pin
YUV6114OYUV6 pixel output data.
VDACOVideo DAC output. Refer to description and matrix for UDAC pin
YUV7115OYUV7 pixel output data.
CAMIN3ICamera YUV 3.
PCLK2XSCN116I/O27-MHz video output pixel clock.
CAMIN4ICamera YUV 4.
PCLKQSCN1 17O13.5-MHz video output pixel clock.
CAMIN5ICamera YUV 5.
VSYNC#118I/OVertical sync, active low.
CAMIN6ICamera YUV 6.
HSYNC#119I/OHorizontal sync, active low.
CAMIN7ICamera YUV 7.
HD[5:0]
DCI[5:0]I/ODVD channel data I/O [5:0].
AUX1[5:0]I/OAux1 data I/O [5:0].
HD[6]
DCI[6]I/ODVD channel data I/O [6].
AUX1[6]I/OAux1 data I/O [6].
VFD_DOUTIVFD data output.
HD[7]
DCI[7]I/ODVD channel data I/O [7].
AUX1[7]I/OAux1 data I/O [7:0].
VFD_DINIVFD data input.
HD[8]
DCI_FDS#I/ODVD input sector start.
AUX2[0]I/OAux2 data I/O 0.
VFD_CLKIVFD clock input.
HD[9]
AUX2[1]I/OAux2 data I/O [1] when selected.
SQSQISubcode-Q data.
HD[10]
AUX2[2]I/OAux2 data I/O [2] when selected.
SQSKISubcode-Q clock.
108
127:122
128
131
132
133
134
OYUV2 pixel output data.
I/OHost data I/O [5:0].
I/OHost data I/O [6].
I/OHost data I/O [7].
I/OHost data bus 8.
I/OHost data bus line 9.
I/OHost data bus line10.
64
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