Sharp 21HS-50N User manual

1
21HS-50N
MODELS 21HS-50N
GA-1E CHASSIS
Issued: 17th May 2002
SERVICE MANUAL
SHARP CORPORATION
PAL B/G SYSTEM COLOUR TELEVISION
SE0021HS50N00
In the interests of user safet (required b safet
regulations in some countries) the set should restored
to its original condition and onl parts identical to
those specified should be used.
This document has been published to
be used for after sales service onl .
ELECTRICAL SPECIFICATIONS .....................3
IMPORTANT SERVICING NOTES ...................4
CONTROLS & TERMINALS..............................5
SERVICE ADJUSTMENTS................................6
CHASSIS LAYOUT...........................................12
LED FLASHING CODE....................................13
PRINTED WIRING BOARDS...........................13
ICs ADDITIONAL INFORMATION...................18
SCHEMATIC DIAGRAM, WAVE FORMS........26
BLOCK DIAGRAM...........................................32
TROUBLESHOOTING TABLES......................34
PARTS LISTING.............................................37
CONTENTS

2
21HS-50N
Use this page to keep an special servicing information as Technical Report (Bulletin), Technical Information, etc.
If onl part number changes are required, just change part number directl the part number in the Parts Listing Section.
If ou need more information, please refer to the Technical Report (Bulletin).
Service Manua update og sheet
Part No.
Technica Report No.
Technica Bu etin No. Cause / So ution Page No. App ication
Data /Seria No.

3
21HS-50N
ELECTRICAL SPECIFICATIONS
•Power Input ................220V-240 Volts AC 50Hz
•Power Consumption
•Audio Power Output Rating .........4W x 2(MPO)
Speaker.........................16Ω 4W, 9 x 5 cm,2pcs
Normal Operation (Method IEC60107)....47W
Stand-b Operation..............................3W
•White Level
Set the brightness control, with no signal connected, so that the CRT cathode current is 600µA. The
maximum correction applied to each cathode current to achieve a screen temperature of 8900 degrees
K-2 MPCD should not exceed 15% of its original value.
Convergence.................Self Converging S stem
Focus...........................Bi-Potencial Electrostatic
Sweep Deflection.... .............................Magnetic
•Aerial Input Impedance
VHF/UHF...................75 ohm Unbalanced
•Tuning Ranges .....48.25MHz thru 855.25 MHz
VHF.....CH02-CH12
S1-S41 (HYPERBAND)
UHF......CH21 - CH69
•Picture Intermediate Frecuenc ...........38.9MHz
•Sound Carrier Trap............................32.4MHz
•Adjacent Sound Carrier Trap.............40.4MHz
•Adjacent Picture Carrier Trap...........31.9MHz
WARNING
The chassis in this receiver is partiall hot. Use an isolation transformer between the line cord plug
and power receptacle, when servicing this chassis.
To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to
qualified service personnel.
Specifications are subject to change without prior notice.
X Y Screen temperature
0.290 + 0.015 0.284 + 0.015 8900º K-20 MPCD
MODEL DESTINATION (Operation Manua anguages)
21HS50N: Spanish, Portuguese

4
21HS-50N
IMPORTANT SERVICING NOTES
Onl qualified service personnel are allowed to carr out maintenance and repair of this receiver.
Servicing of high vo tage system and CRT
It is important that the static charge is removed from the high voltage s stem when carr ing out work on the
receiver. This can be achieved b connecting a 10K resistor (with a suitabl insulated lead) from the CRT cavit
connector to the CRT ground tag. This must be carried out with the AC suppl disconnected from the receiver.
Note the following:
• The CRT in this receiver emplo s Integral Implosion Protection.
• If the CRT has to be changed it MUST be replaced with the correct t pe for continued safe working
• DO NOT lift the CRT b its neck.
• When handing the CRT, ensure that shatterproof goggles are worn.
• Ensure that the CRT is discharge before handling.
X-Ray
This receiver is designed to keep an x-ra emission to an absolute minimum. Some fault conditions and
servicing procedures ma produce potentiall hazardous x-ra radiation levels. This is a problem when in close
proximit to the receiver for long periods of time. To reduce an risks associated with this, please observe the
following precautions:
1. When undertaking an servicing on this chassis, DO NOT increase the EHT to more than 30.5 KV,
(at a instantaneous beam current of 1300µA).
2. Ensure that during normal operation the EHT does not exceed 25.0 KV±1.5KV (at a beam current of
1100µA). This level has been preset in the factor . Alwa s check that this level has not been exceeded after
carr ing out an repair on the receiver.
3. DO NOT replace the CRT with an other t pe than that specified in the parts listing as this ma
cause excessive x-ra radiation.
Before returning the receiver to the customer
In addition to the above checks, the following should also be carried out before returning the receiver to the
customer.
1. Inspect all the leads to ensure that the are dressed correctl and that the are not obstructed or
pinched b an other parts.
2. Ensure that all protective devices are in good condition. These will include nonmetallic control
knobs, insulating fish papers, cabinets backs, compartment covers or shields, mechanical insulators,etc.

5
21HS-50N
TV/VIDEO
VCRTV
CH
CH
MENU
LIST
GA006SA
TV/ VCR / TEXT REMOTE CONTROL
123
456
78
0
9
TV
VCR
CH
CALL ( )/CHILD LOCK ( ) button
Infr red Tr nsmitter Window
Aim this window at the infrared sensor
on yourTV set
FLASHBACK ( ) button
Returns to previously viewed
programme
TV/VIDEO Select button
POWER/STANDBY ( ) button
Progr mme Select buttons
MENU button
HALF PAGE ( ) button (Teletext)
VOLUME UP ( )/DOWN ( ) buttons
( ) Increases sound
( ) Decreases sound
(These are also used for menu set up)
CANCEL ( ) button (Teletext)
RESET ( ) button (Teletext)
Single/Double Entry button ( )
Text/Mix ( )
Select button (Teletext)
COLOUR buttons
REVEAL ( ) button (Teletext)
TV button (Teletext)
HOLD ( ) button (Teletext)
CHANNEL (PROGRAMME) UP ( )/
DOWN ( ) buttons
( ) Selects next higher programme
( ) Selects next lower programme
(These are also used for menu
set up)
STORE ( ) button (Teletext)
SOUND MUTE ( ) button
CLOCK ( ) button (Teletext)
Sound Mode Select ( ) button
INDEX ( ) button (Teletext)
LIST Select button (Teletext)
26
MENU CH
Power ( ) button
Power/On Timer indicator
Remote Control Sensor
Menu button
Volume U ( )/Down ( ) buttons
Channel U ( )/Down ( ) buttons
Remote Control
TV Front
Euro-SCART 21-Pin Terminal
1. Audio right output
2. Audio right input
3. Audio left output
4. Common earth for audio
5. Earth for blue
6. Audio left input
7. Blue input
8. Audio-video control
9. Earth for green
10. Not used
11. Green input
12. Not used
13. Earth for red
14. Not used Audio: Stereo Input/Output.
21-Pin Euro-
15. Red input
16. Red/Green/Blue
control
17. Earth for video
For greater A/V enjoyment, various audio and video devices may be
connected via the Euro-SCART 21-Pin Terminal.
18. Earth for video
19. VIDEO output
20. VIDEO input
21. Common earth
CONTROL & TERMINALS

6
21HS-50N
SERVICE ADJUSTMENT
• Service Mode function
All required adjustments for servicing this TV set, ma be done in “service mode”, excepting G2 and FOCUS.
How to access the Service Mode
1. Turn the receiver on and ensure that it is tuned into a test pattern.
2. Turn the receiver off using the mains switch.
3. Press the volume down and channel up buttons together. See Fig.1.
4. Continue pressing the volume down and channel up buttons while turning
the mains on using the mains switch. See Fig.1.
5. Keep pressing the volume down and channel up buttons until the picture appears.
6. When <<SHARPX X VXX.XX>> appears on the screen, release the two buttons.
7. The receiver is now in the service mode.
To move between the various service mode functions, use the channel up and down buttons.
Use the volume buttons to change the data to the desired value.
The data will be stored automaticall when exiting the service mode. To exit the service mode press the standb button
on the remote control or turn the receiver off with the mains switch.
XXXX:
Adjustment
(Yellow)
Value
(Green)
Fig. 3Fig. 2
SHARP X X VXX.XX
STS0: XXXX XXXX
STS1: XXXX XXXX
STS2: XXXX XXXX
XX:
•
•
•
•
4
3
CH
MENU
Fig.1

7
21HS-50N
No. OSD Function Range Initial Default FIX/ADJ
1 AGC AGC Take Over Point 0...63 34 34 ADJ
2 V-LIN Vertical Slope [VS] 0...63 33 33 ADJ
3 V-AMP Vertical Amplitude [VA] 0...63 18 18 ADJ
4 V-CENT Vertical Shift [VSH] 0...63 17 17 ADJ
5 H-CENT Horizontal shift [HS] 0...63 34 34 ADJ
6 H-CENT60 offset to H-CENT for 60 Hz 0...31 data(-16..+15) 20 20 FIX
7 EW / / Horizontal Parallelogram [HP] 0...63 32 32 FIX
8 HB Horizontal Bow 0...63 32 32 FIX
9 S-COR S-Correction [SC] 0...63 22 22 FIX
10 DRI-RS White point Red Standard white temp. 0...63 42 42 ADJ
11 DRI-GS White point Green Standard white temp. 0...63 42 42 ADJ
12 DRI-BS White point Blue Standard white temp 0...63 42 42 ADJ
13 DRI-RW White point Red Warm white temp. 0...32 16 16 FIX
14 DRI-GW White point Green Warm white temp. 0...32 9 9 FIX
15 DRI-BW White point Blue Warm white temp. 0...32 9 9 FIX
16 DRI-RC White point Red Cold white temp. 0...32 9 9 FIX
17 DRI-GC White point Green Cold white temp. 0...32 9 9 FIX
18 DRI-BC White point Blue Cold white temp. 0...32 16 16 FIX
19 SUB-VOL Max Volume 0...63 60 60 FIX
20 SUB-CON Sub Contrast 0...63 63 63 FIX
21 SUB-COL Sub Colour 0...63 25 25 FIX
22 SUB-BRI Sub Brightness 0...63 34 34 FIX
23 TINT Sub Tint 0...63 32 32 FIX
24 SUB-SHP Sub Sharpness 0...63 11 11 FIX
. Service adjustment and data ist
The table below shows the various service mode positions, range of values and default value. The columns are headed
as below.
Heading: Descriptions:
OSD This is what will appear on the screen at this position
Function This is the description of the mode’s function
Range This is the range of values that can be entered while in this mode
Initial This is the initial value, i.e. just after changing the NVM
Default This is the recommended default value for this mode
FIX/ADJ If this is ADJ, then it ma be necessar to adjust this value awa from the default

8
21HS-50N
No. OSD Function Range Initial Default FIX/ADJ
25 HTL-VOL Max Hotel Volume 0...63 30 30 FIX
26 HTL-PRG Hotel Program number 0...99 or > 99 for none 255 255 FIX
27 RGB OSD RGB Reference 0...15 0 0 FIX
28 SEARCH-SYS Sound s stem for auto turning 0(L-BG),1(BG),2(I),3(DK) 1 1 FIX
29 CUT-R Black Level offset R [BLR] 0...63 0 0 FIX
30 CUT-G Black Level offset G [BLG] 0...63 10 10 FIX
31 CDL Cathode Drive Level [CL] 0...15 5 5 FIX
32 DL-PT Y-Dela time for PAL (TV) [YD] 0...15 4 4 FIX
33 DL-ST Y-Dela time for SECAM (TV) [YD] 0...15 8 8 FIX
34 DL-4T Y-Dela time for N443 (TV) [YD] 0...15 8 8 FIX
35 COL-OP COLOUR OFFSET (PAL) 0...15 8 8 FIX
36 COL-OS COLOUR OFFSET (SECAM) 0...15 8 8 FIX
37 COL-O4 COLOUR OFFSET (NTSC443) 0...15 4 4 FIX
38 SHP-OP SHARPNESS OFFSET(PAL) 0...15 8 8 FIX
39 SHP-OS SHARPNESS OFFSET(SECAM) 0...15 4 4 FIX
40 SHP-O4 SHARPNESS OFFSET(NTSC443) 0...15 8 8 FIX
41 SC-VOL SCART volume 0..255 109 109 FIX
42 PRE-SC Prescaler SCART input 0..127 25 25 FIX
43 PRE-FM Prescaler FM/AM 0..127 72 72 FIX
44 PRE-NICAM Prescaler SCART input 0..127 90 90 FIX
45 AVC-DKY AVC Deca 1...4 data(1.2.4.8.) 1 1 FIX
46 PRE-M Prescaler SCART input for LL’mono 0...127 3 0 FIX
47 AC-OFF-TIM Time to set the AC-OFF 0..15 0 0 FIX
timer is in steps of 10 minutes
48 DISP Language or s mbols 0(s mbols), 0 0 FIX
1(English),
2(French)
49 TXT-EUR Teletext pan-European language 0 (teletext pan-european language) 0 0 FIX
1 (second language;c rillic)
2(third language;Greek)
50 BKS Black Stretch 0 (disable) or 1 (enable) 1 1 FIX
51 AVC Automatic Volume Control(AVL) 0 (disable) or 1 (enable) 1 1 FIX
52 FFI Fast Filter IF-PLL 0 (disable) or 1 (enable) 0 0 FIX
53 ACL Auto Colour Limit 0 (disable) or 1 (enable) 1 1 FIX
54 S-L Sound s stem L 0 (disable) or 1 (enable) 0 0 FIX
55 S-DK Sound s stem DK 0 (disable) or 1 (enable) 1 0 FIX
56 S-I Sound s stem I 0 (disable) or 1 (enable) 1 0 FIX
57 S-BG Sound s stem BG 0 (disable) or 1 (enable) 1 1 FIX
58 BLUE-BACK Video mute at Ident loss 0 (disable) or 1 (enable) 1 1 FIX
59 VMC Video Mute at program/source Change 0 (disable) or 1 (enable) 1 1 FIX
60 HTL Hotel mode 0 (disable) or 1 (enable) 0 0 FIX
61 BTSC Reduced FM demodulator Gain (for BTSC sig) 0 (disable) or 1 (enable) 0 0 FIX
62 AV Number of external AV sources 0 for 1 AV or 1 for 2 AV 0 0 FIX
63 FMWS FM Window Selection 0 (disable) or 1 (enable) 0 0 FIX
64 SM0 Sound Mute bit 0 0 (disable) or 1 (enable) 1 1 FIX
65 SM1 Sound Mute bit 1 0 (disable) or 1 (enable) 0 0 FIX
66 AGC0 IF AGC speed bit0 0 (disable) or 1 (enable) 1 1 FIX
67 AGC1 IF AGC speed bit1 0 (disable) or 1 (enable) 0 0 FIX
68 FOA-FE Phi 1 time constant for FE(RF) 0 (disable) or 1 (enable) 0 0 FIX
69 FOB-FE Phi 2 time constant for FE(RF) 0 (disable) or 1 (enable) 0 0 FIX
70 FOA-AV Phi 1 time constant for AV 0 (disable) or 1 (enable) 1 1 FIX
71 FOB-AV Phi 2 time constant for AV 0 (disable) or 1 (enable) 1 1 FIX
72 TXT Teletext 0 (disable) or 1 (enable) 1 1 FIX
73 TXT-WE Teletext Western or Eastern characters 0 (Western) or 1 (Eastern) 0 0 FIX
74 FSL Forced V-SYNC slicing level 0 (disable) or 1 (enable) 0 0 FIX
75 HP2 S nc of OSD 0 for Ph1 or 1 for Ph2 0 0 FIX
76 CP Charge pump 0 (fast tuning) or 0 0 FIX
1 (moderate speed tuning)
77 NICAM NICAM decoding enabled 0 (disable) or 1 (enable) 1 1 FIX
78 IGR IGR decoding enabled 0 (disable) or 1 (enable) 1 1 FIX
79 AUTO Start auto tuning at POWER-ON 0 (disable) or 1 (enable) 0 0 FIX
80 TXT-TGL Function of TXT ke 0 or 1 0 0 FIX
81 EVG Enable Vertical Guard 0 (disable) or 1 (enable) 1 1 FIX

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21HS-50N



• Screen adjustment
1. G2 Adjustment
1. Enter the service mode (see page 6).
2. Use the channel up or channel down buttons to enter the << BLUE-BACK >>
function.
3. Set this to << BLUE-BACK: 0 >>, i.e. blue background is turned off.
4. Turn the set off at the mains.
5. Turn the set back on.
6. Set the picture control settings to normal.
7. Select the SCART input b pressing the TV/SCART button on the remote con-
trol. Do not connect an input to the SCART socket. A blank raster will appear.
8. Connect an oscilloscope to TP851 on the CRT PWB. The waveform as in fig-
ure 4 should be displa ed.
9. Adjust the G2 control (screen voltage) so that the peak of this waveform is 3.0V
+/-0.1V above the zero volt line.
10. Enter the service mode.
11. Turn the blue background function back on again - set << BLUE-BACK: 1 >>.
12. Turn off the receiver using the mains button.
13. The G2 adjustment is now complete.
2. Focus Adjustment
1. Receive a monoscope pattern signal at a level of 60 to 80 dBµV.
2. Set the picture settings to normal.
3. Adjust the focus potentiometer to obtain maximum definition.
• AGC Adjustment
1. Tune the receiver into a colour bar signal on channel E-12.
2. Set the RF generator to an output signal strength of 59 dB/µV (+/-1dBµV) –75 Ohms.
3. Connect an oscilloscope to TP201. TP201 is one end of R201.
4. Enter the service mode (see page 6).
5. Use the channel up and channel down buttons to enter the AGC mode.
6. B using the volume up and the volume down buttons, adjust the AGC until the voltage on TP201 drops b 0.1V
to 0.3V below its maximum value.
7. Change the input signal strength to 66-70dBµV and make sure that there is no noise apparent in the picture.
8. Turn the receiver off at the mains, this will exit the service mode and store the adjustment.
Fig. 4

10
21HS-50N
• Geometry adjustment procedure
To adjust the geometr , follow the procedure outlined below:
1. Tune the set into a Philips test pattern.
2. Enter the service mode as described on page 6.
3. Use the channel up or channel down buttons to enter the desired mode
4. Use the volume buttons to achieve correct setting.
5. When adjustments are complete, use the standb button to turn off the set. The adjustment values will be stored at
this point.
V-LIN
Adjust the vertical linearit control so that the picture centring is as shown in figure 5.
V-AMP
Adjust the vertical amplitude control so that the picture overscans as shown in figure 6.
V-CENT
Adjust the vertical centring control so that the picture is centred as shown in figure 7.
H-CENT
Adjust the horizontal centring control so that the picture is centred as shown in figure 8.
Fig. 5
Fig. 6
Fig. 7
Fig. 8

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21HS-50N
•Co our adjustment procedure
The following adjustments should onl be carried out when the CRT or IC801 are replaced.
Notes:
• This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 700 µA.
• The red value «DRI-RS» should be fixed to 42. (Refer to “How to access service mode” section).
• «DRI-GS» adjustment alters “Y” coordinate.
• «DRI-BS» adjustment alters “X” and “Y” coordinates.
Adjustment method 1 (using the signal generator, var ing the picture signal)
1. Adjust G2.
2. Input a white pattern with burst signal from SCART.
3. Position the colorimeter in the centre of screen.
4. Adjusting input signal level, select a luminance of 70 nits.
5. Operate again in “service mode“ and select «DRI-GS» and/or «DRI-BS» locations to obtain colour coordinates:
6. Reset the TV with the mains switch button to store the adjustment and exit service mode.
7. Check colour coordinates “X” and “Y” at 20 a 120 Nits. It ma be necessar to repeat the same procedure to
obtain the above values.
Adjustment method 2 (using the signal generator, with a fixed picture signal)
1. Adjust G2.
2. Tune a white pattern with burst signal.
3. Operate in “service mode”:
4. Using «SUB-CON», select a luminance of 70 nits.
5. Operate again in “service mode“ and select «DRI-GS» and/or «DRI-BS» locations to obtain colour coordinates:
6. Select «SUB-CON». Return data to “63”.
7. Reset the TV with the mains switch button to store the adjustment and exit service mode.
8. Check colour coordinates “X” and “Y” at 20 a 120 Nits. It ma be necessar to repeat the same procedure to
obtain the above values.
X Y Screen temperature
0.290 + 0.015 0.284 + 0.015 8900º K-20 MPCD
X Y Screen temperature
0.290 + 0.015 0.284 + 0.015 8900º K-20 MPCD

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21HS-50N
CHASSIS LAYOUT
Mother unit
CRT unit

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21HS-50N
LED FLASHING CODE
IC/Modu e Name S ave Address Bus Error LED Remarks Ref. No.
B inking Time
M24C04 A0,A2 2 512x8 EEPROM IC1002
TDA935x/6x/8x 8A 3 Address of internal TV processor IC801
VTST6HD64 or C0 6 PLL Tuner TU201
CTF551 C0 6
MSP34x5G 80 5 Multistandard Sound Processor IC3001
PURPOSE: The led indicates the power mode,ocurred I2C error and On timer
INPUT: - Current power mode
- I2C Errors
- On timer
Processing: - If in STANDBY mode and On timer in-active then switch LED off.
- If in STANDBY and On timer active
set LED to blinking, (switch on and off at 1 Hz with a 50 % dut c cle).
- If in POWER-ON mode, switch LED on.
- If an I2C error occurred, let the LED blink at 1 Hz, 50 % dut c cle.
For the blinking times see the Table below.
Note: Onl when an I2C error occurs for a number of times, or for a number of seconds,
the I2C error is handled b the s stem (that is ,onl then the set will go to standb ,
the led starts blinking).
F 7341N0 PRINTED WIRING BOARD. Components side.
0
1
2
3
4
5
6
Y
X
10123456 7 8 9
Table Error LED blinking times

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21HS-50N
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21HS-50N
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21HS-50N
F 7340N6 PRINTED WIRING BOARD. Copper side.
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21HS-50N
F 7340N6 PRINTED WIRING BOARD. Copper side.
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21HS-50N
QUICK REFERENCE DATA
SYMBOL PARAMETER MIN. TYP. MAX. UNIT
Supply
VPsupply voltages −8.0/3.3 −V
IPsupply current −135/60 −mA
Input voltages
ViVIFrms) video IF amplifier sensitivity (RMS value) −75 −µV
ViSIF(rms) QSS sound IF amplifier sensitivity (RMS value) −60 −µV
ViAUDIO(rms) external audio input (RMS value) −500 −mV
ViCVBS(p-p) external CVBS/Y input (peak-to-peak value) −1.0 −V
ViCHROMA(p-p) external chroma input voltage (burst amplitude)
(peak-to-peak value) −0.3 −V
ViRGB(p-p) RGB inputs (peak-to-peak value) −0.7 −V
ViYIN(p-p) luminance input signal (peak-to-peak value) −1.4 −V
ViUVIN(p-p) U/V input signal (peak-to-peak value) −1.33/1.05 −V
Output signals
Vo(IFVO)(p-p) demodulated CVBS output (peak-to-peak value) −2.5 −V
Vo(QSSO)(rms) sound IF intercarrier output in QSS versions (RMS value) −100 −mV
Vo(AMOUT)(rms) demodulated AM sound output in QSS versions (RMS
value) −500 −mV
Io(AGCOUT) tuner AGC output current range 0 −5mA
VoRGB(p-p) RGB output signal amplitudes (peak-to-peak value) −2.0 −V
IoHOUT horizontal output current 10 −−mA
IoVERT vertical output current (peak-to-peak value) 1 −−mA
IoEWD EW drive output current 1.2 −−mA
ICs ADDITIONAL INFORMATION:
TDA9350(IC801)
handbook, halfpage
XXX
MXXxxx
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
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
Pin configuration (SDIP 64)
TDA935X/6X/8X PS/N2
P1.3/T1 P1.6/SCL P1.7/SDA P2.0/TPMW P3.0/ADC0 P3.1/ADC1 P3.2/ADC2 P3.3/ADC3 VSSC/P P0.5 P0.6 VSSA SECPLL VP2 DECDIG
HOUT
FBISO
PH2LF PH1LF GND3 AVL/EWD VDRB VDRA IFIN1 IFIN2
EHTO
IREF VSC TUNERAGC AUDEEM/SIFIN1 DECSDEM/SIFIN2 PLLIF
IFVO/SVO
DECBG
CVBSINT VP1 CHROMA CVBS/Y GND1 AUDOUT/AMOUT
AVL/SNDIF/
BLKIN BO GO RO BCLIN R2/VIN B2/UIN G2/YIN
INSSW2
VDDA VPE VDDC OSCGND XTALIN XTALOUT RESET VDDP P1.0/INT1 P1.1/T0 P1.2/INT0
GND2 AMOUT
AUDEXT/QSSO/
SNDPLL/SIFAGC
REFO/AMOUT

19
21HS-50N
TDA9350(IC801)
BLOCK DIAGRAM
SOUND
TRAP
TUNERAGC
+8V
HOUT V-DRIVE
RO GO B0
BCLIN
BLKIN
CVBS/Y
IFIN
AUDOUT
AUDEXT
Block diagram TDA935X/6X8X PS/N2 with mono intercarrier sound demodulator
CHROMA
SDASCL
VISION IF
ALIGNMENT-FREE
PLL DEMOD.
AGC/AFC
VIDEO AMP.
VIDEO SWITCH
VIDEO IDENT.
VIDEO FILTERS
PAL/SECAM/NTSC
DECODER
DEEMPHASIS
AUDIO SWITCH
(AVL)
VOLUME CONTROL
BASE-BAND
DELAY LINE
H/V SYNC SEP.
H-OSC. + PLL
H-DRIVE
2nd LOOP
H-SHIFT
V-DRIVE +
CONTR/BRIGHTN
OSD/TEXT INSERT
CCC
WHITE-P. ADJ.
80C51 CPU
I2C-BUS
TRANSCEIVER
ROM/RAM TELETEXT
ACQUISITION
1/10 PAGE MEMORY
TELETEXT/OSD
DISPLAY
RG BBL
Y U V
HV
REF
ENHANCED
VST PWM-DAC
VST OUT
I/O PORTS
I/O PORTS (4x)
+3.3 V
RESET
LED OUT (2x)
ADC IN (4x)
VPE
(EW GEOMETRY)
GEOMETRY
EHTO EWD R/V G/Y B/U BL
RGB/YUV INSERT
RGB
REF
CVBS
SYNC
H
V
COR
27 37 38
33
(20) 29 28
34
44 60 55 59 58 57
10/11
234
5-8
1+62-64
912 54 56 61
51 52 53
49 50
45
484746
(20)
36
21
222625
16
35
17
31
15
19
14
39 18
41
(32) 13
43
42
40 24
23
RGB/YUV MATRIX
SATURATION
YUV/RGB MATRIX
30
LUMA DELAY
PEAKING
BLACK STRETCH
AGC CIRCUIT
NARROW BAND
PLL
DEMODULATOR
(32)
(32)
SNDIF

20
21HS-50N
TDA9350(IC801)
PINNING
SYMBOL PIN DESCRIPTION
P1.3/T1 1 port 1.3 or Counter/Timer 1 input
P1.6/SCL 2 port 1.6 or I2C-bus clock line
P1.7/SDA 3 port 1.7 or I2C-bus data line
P2.0/TPWM 4 port 2.0 or Tuning PWM output
P3.0/ADC0 5 port 3.0 or ADC0 input
P3.1/ADC1 6 port 3.1 or ADC1 input
P3.2/ADC2 7 port 3.2 or ADC2 input
P3.3/ADC3 8 port 3.3 or ADC3 input
VSSC/P 9 digital ground for µ-Controller core and periphery
P0.5 10 port 0.5 (8 mA current sinking capability for direct drive of LEDs)
P0.6 11 port 0.6 (8 mA current sinking capability for direct drive of LEDs)
VSSA 12 analog ground of Teletext decoder and digital ground of TV-processor
SECPLL 13 SECAM PLL decoupling
VP2 14 2nd supply voltage TV-processor (+8V)
DECDIG 15 decoupling digital supply of TV-processor
PH2LF 16 phase-2 filter
PH1LF 17 phase-1 filter
GND3 18 ground 3 for TV-processor
DECBG 19 bandgap decoupling
AVL/EWD (1) 20 Automatic Volume Levelling /East-West drive output
VDRB 21 vertical drive B output
VDRA 22 vertical drive A output
IFIN1 23 IF input 1
IFIN2 24 IF input 2
IREF 25 reference current input
VSC 26 vertical sawtooth capacitor
TUNERAGC 27 tuner AGC output
AUDEEM/SIFIN1(1) 28 audio deemphasis or SIF input 1
DECSDEM/SIFIN2(1) 29 decoupling sound demodulator or SIF input 2
GND2 30 ground 2 for TV processor
SNDPLL/SIFAGC(1) 31 narrow band PLL filter /AGC sound IF
AVL/SNDIF/REF0/
AMOUT(1) 32 Automatic Volume Levelling / sound IF input / subcarrier reference output /AM output
(non controlled)
HOUT 33 horizontal output
FBISO 34 flyback input/sandcastle output
AUDEXT/
QSSO/AMOUT(1) 35 external audio input /QSS intercarrier out /AM audio output (non controlled)
EHTO 36 EHT/overvoltage protection input
PLLIF 37 IF-PLL loop filter
IFVO/SVO 38 IF video output / selected CVBS output
VP1 39 main supply voltage TV-processor (+8 V)
CVBSINT 40 internal CVBS input
GND1 41 ground 1 for TV-processor
CVBS/Y 42 external CVBS/Y input
CHROMA 43 chrominance input (SVHS)
AUDOUT /AMOUT(1) 44 audio output /AM audio output (volume controlled)