Philips A10PTV2.0 Service Manual Download Page 34

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Circuit Description

GB 100

A10PTV2.0 NTSC

SNDR-SC1-OUT

Sound right AV1 out

SNDR-SC2-IN

Sound right AV2 out

SNDR-SC2-OUT

Sound right AV2 out

SNDS-VL-OUT

Surround sound left variable level
out

SNDS-VR-OUT

Surround sound right variable level
out

SNERT

Synchronous No parity Eight bit
Reception and Transmit

SSB

Small Signal Board

STBY

Standby

Subwoofer

TXT

Teletext

microprocessor

Vertical Acquisition

V-BAT

Main supply for deflection

VFB

Vertical Flyback Pulse: vertical sync
pulse coming from the feature box

Variable Level out: processed audio
output towards external amplifier

WYSIWYR

What You See Is What You Record:
record selection that follows main
picture and sound

XTAL

Quartz crystal

Y-OUT

Luminance signal

Summary of Contents for A10PTV2.0

Page 1: ...en 32 33 Small Signal Board Section 1 34 45 50 Small Signal Board Section 2 35 45 50 Small Signal Board Section 3 36 45 50 Small Signal Board Section 4 37 45 50 Small Signal Board Section 5 38 45 50 Small Signal Board Section 6 39 45 50 Small Signal Board Section 7 40 45 50 Small Signal Board Section 8 41 45 50 Small Signal Board Section 9 42 45 50 Small Signal Board Section 10 43 45 50 Small Sign...

Page 2: ... 1 Video 1 Vpp 75 ohm 2 Audio Left 0 2 Vrms 10 k ohm 3 Audio Right 0 2 Vrms 10 k ohm 4 Headphone 32 2000 ohm 10 mW 1 2 2 Rear Connections AV1 In 1 Video 1 Vpp 75 ohm 2 Audio L 0 5 Vrms 10 k ohm 3 Audio R 0 5 Vrms 10 k ohm 4 Y 0 7 Vpp 75 ohm 5 Pb 0 7 Vpp 75 ohm 6 Pr 0 7 Vpp 75 ohm AV2 In 1 Video 1 Vpp 75 ohm 2 Audio L 0 5 Vrms 10 k ohm 3 Audio R 0 5 Vrms 10 k ohm AV2 In SVHS 1 gnd 2 gnd 3 Y 1 Vpp 7...

Page 3: ...10PTV2 0 NTSC 1 1 3 Chassis Overview Figure 1 2 Red CRT Side J Side Jack Panel LSB Panel Center Channel Switch Filter Panel Green CRT Blue CR Blue CRT PIP Panel SSM Panel AC P C Power Switch Panel SSB Module Keyboard IR LED Panel SVM Panel CL 16532050_001 eps 090501 ...

Page 4: ...tenance inspection carried out by a qualified service employee The interval depends on the usage conditions When the set is used under normal circumstances for example in a living room the recommended interval is 3 to 5 years When the set is used in circumstances with higher dust grease or moisture levels for example in a kitchen the recommended interval is 1 year The maintenance inspection contai...

Page 5: ...ce fingerprints or smudges on mirror 4 1 4 Removal of Plastic Light Barrier 16 1 Remove two screws E located at the sides of the Plastic Light Barrier 4 1 5 Removal of Side Back Covers 3 NOTE To gain access to the Side Jack Panel D and two Speakers remove the Left Side Back Cover To gain access to the AC Power Switch Panel L remove the Right Side Back Cover 1 Remove 4 screws F from each of the Sid...

Page 6: ... 1 12 Removal of Double Window PIP Panel F 1 Remove 3 screws from panel 4 1 13 Removal of Analog SSB E 1 Pull frame up 2 Pull board to right and then up 4 1 14 Removal of Front Control 1 Remove front speaker baffle 30 by gently pulling baffle frame away from cabinet 2 Remove 3 screws from front control 4 1 15 Removal of Euro SVM Panel J 1 Press 3 treelocks to remove Euro SVM board 4 1 16 Removal o...

Page 7: ...es the Set in the Following Pre defined Conditions Tuning frequency set to channel 3 Volume level set to 25 of the maximum volume level Other picture and sound settings set to 50 mid range The Following Functions are Turned Off in SDM and After Leaving SDM Timer Sleep timer The Following Functions are Disabled During SDM and Enabled After Leaving SDM Parental lock All other controls operate normal...

Page 8: ...button on the remote control switches between the SAM and the normal user menus with the SAM mode still active in the background Pressing the MENU key in a submenu will return the screen to the previous menu 5 4 The Menus and Submenus 5 4 1 Clear Errors Erases the contents of the error buffer Select the CLEAR ERRORS menu item and press the cursor LEFT or cursor RIGHT key The contents of the error ...

Page 9: ...refore modifications in this mode are not possible 5 6 1 Entering the Customer Service Mode The Customer Service Mode can be switched on By pressing the MUTE button on the remote control and any key on the local keyboard Channel Up Channel Down VOL VOL on the TV simultaneously for at least 4 seconds When the CSM is activated picture and sound settings are set to nominal levels Modes that interfere...

Page 10: ...ulty in this case the CODES line will contain number 13 or 16 check the tuner and replace repair if necessary Note On some models if the BM option is ON BLUE MUTE is displayed when no signal is received Line 6 TIMER ON Indicates that the on off timer is running The following Complaints may be caused by the activation of the sleep timer The set may turn on from standby or may switch to a different ...

Page 11: ...ice unfriendly options To next CSM page To previous CSM page Press MUTE button RC and any key on the local keyboard except POWER for more than 4 seconds Channel down RC or local keyboard Channel up RC or local keyboard Restore picture sound and feature settings that were stored during entry Other key Off Exit CSM when the set is switched on picture sound and feature settings that were stored durin...

Page 12: ...4 5 volts If the startup voltage is not present check the startup resistor 3300 and the bridge rectifier If the voltage on Pin 1 is changing check the drive signal on Pin3 Then check for signal on the gate and drain of 7301 An excessive load on the secondary a short on the 130 volt line for example would cause the supply to pulse with little or no voltage on the secondary 5 7 2 Picture Problems Pi...

Page 13: ...urn each G2 control clockwise until each CRT is barely illuminated 8 3 2 Gray Scale Setup 1 Connect a Gray Scale pattern to the set 2 Preset the registers as shown below NORMAL RED 26 NORMAL GREEN 56 NORMAL BLUE 59 NORMAL BLACK LEVEL RED 10 NORMAL BLACK LEVEL GREEN 13 DELTA COOL RED 6 DELTA COOL GREEN 7 DELTA COOL BLUE 4 DELTA COOL BLACK LEVEL RED 2 DELTA COOL BLACK LEVEL GREEN 1 DELTA WARM RED 6 ...

Page 14: ...lete press the Menu button on the Remote to return to the SELECTION menu 4 Highlight the STORE selection and press the right cursor key on the Remote to save changes 5 Use the GREEN TO RED or GREEN TO BLUE selections to perform convergence when the Green CRT has been replaced Complete In Depth Convergence 8 4 3 Screen Centering 1 Make sure a signal is applied to the set 2 Enter the Convergence mod...

Page 15: ...eometry alignment In widescreen models the GEOMETRY SW is available for separate alignments of the superwide panorama mode 8 6 1 Initial Set Up Press the PICTURE button on the remote control repeatedly to change the Smart Picture setting to NATURAL Enter SAM see Chapter 5 Service Alignment Mode Press the Menu Down button to select the GEOMETRY menu item Press the Cursor Right button to enter the G...

Page 16: ...7 x 64 value option bit 8 x 128 Total is value is option byte Option abbrevia tion 3AP1 3AP2 CODE DESCRIPTIONS D ABSY AUTO STANDBY AFTER NO INTERAC TION OFF SBNP AUTO STANDBY NO PICTURE ON CVI COMPONENT VIDEO INPUT ON C169 COMPRESS 16 9 MODE AVAILABLE OFF E149 EXPAND 14 9 MODE AVAILABLE OFF HWBMS HARDWARE BLUE MUTE STREAK ON SMCK SMART CLOCK ON AV3 SIDE AV SOURCE ON AUSB AUTO STANDBY AUTO ON ON CB...

Page 17: ...ted on the Large Signal panel The AC mains voltage is 230 volts for sets with the Power Factor Correction circuit The ac Mains voltage can be either 115 or 230 volts for the multi voltage sets There are two dc output voltages from this panel which are 160 to 325 volts dc to the Standby Power section on the Large Signal panel and 160 to 380 volts dc to the Full Power Section The 160 volts dc is pre...

Page 18: ...cy of the power distribution system The A10 Projection TV without Power Factor correction has a high harmonic content of 85 percent creating a Power Factor of 0 5 High current spikes will also be created in the AC supply With the Power Factor correction circuit the peak current is limited with the harmonic content being reduced The Power Factor is increased to 0 99 The ideal Power Factor is one wh...

Page 19: ... volt reference is used to provide a clamping reference for the other inputs Input current is sampled by resistors 3130 3131 3132 and 3133 This sample is added to the error signal from the Multiplier going into Pin 8 The error signal is amplified and then compared to the oscillator ramp to determine the reset point for the latch When the oscillator goes low the latch is set making output Q High Wi...

Page 20: ...cess will repeat itself Voltage is developed from the HOT secondary winding on Pin 5 This voltage is rectified by 6207 to produce operating voltage for the HOT secondary Voltage from Pin 9 is rectified by 6231 to produce the 3 3 volt Standby voltage When the 3 3 volt Standby voltage has reached the correct level it will turn the Shunt Regulator 6205 on This drives the Opto isolator 7213 which swit...

Page 21: ...in 2303 above 9 4 volts the IC then operates in steady state When IC 7302 develops a normal steady state operation the 130 volt supply is sampled by resistors 3324 3323 and 3322 This sample voltage is then sent to Shunt regulator 7303 which drives the feedback optoisolator 7303 The feedback voltage on Pin 14 is then compared with an internal 2 5 volt reference by comparator C Comparator C then set...

Page 22: ...powered by the 15SSB source from the Full Power Section Figure 9 9 9 6 5 2 Volt Regulator A 5 2 volt source is developed by 7308 and 7307 The Pulse Width modulator in 7307 drives transistor 7308 to produce the source Feedback for regulator is sampled by resistors 3339 3340 and 3334 where it is fed to Pin 5 of 7307 This circuit is powered by the 15 volt supply from the Full Power Section This sourc...

Page 23: ...he Green Enhancement circuit activates medium saturated green towards to a more saturated green The Blue Stretch circuit can be activated which shifts colours near white towards blue The Spectral Processor provides luminance transient improvement YUV from 7403 is fed to the PIP DW Picture in Picture Double Window panel YUV is fed to 7801 PIP DW IC and 7803 Switch IC on the PIP DW panel If the PIP ...

Page 24: ...Circuit Description GB 90 A10PTV2 0 NTSC 9 Figure 9 11 Figure 9 12 CL 06532143_018 eps 081100 CL 06532143_019 eps 081100 ...

Page 25: ...will turn the blanking transistors on When the G2SETUP line goes low diodes 6606 6600 and 6603 are forward biased blanking drive to the CRT s The Red Green and Blue Drive is fed to the Green CRT panel along with a 12 volt bias Red and Blue drive from the Green CRT panel is routed to their respective CRTs Filament voltage and the 240 volt CRT drive voltage from the Scan High Voltage panel is fed to...

Page 26: ...ct light to dark and dark to light transitions The detected signal is fed to a Power Amplifier which drives SVM Yokes on each of the CRT s This drive speeds up the pulse during luminance transitions to sharpen the edges increasing picture sharpness Fast Blanking is fed to transistor Q755 to blank drive to the SVM amplifier for areas of the screen where On Screen Display is present This panel is po...

Page 27: ...he geometry Geometry correction drive E_W is also fed to transistor 7830 which produces drive for the Dynamic Focus LV The Line component to the Dynamic Focus is added in transformer 5802 Figure 9 17 9 7 4 Frame Drive Circuit Frame Drive from the Small Signal panel FDRVP and VDRV is fed to the Frame Output IC 7550 Figure 14 This circuit is powered by a 13 volt supply connected to Pin 8 and a 13 vo...

Page 28: ...cal height When the set is turned on the 130 volts is applied to Pin 10 of the High Voltage module Transistor 7500 acts as an OR gate to detect the failure of Frame Sweep VPUL or Line Sweep 170V Pulse When these pulses appear 7500 is turned off allowing 7501 to turn on This will apply approximately 7 5 volts dc to Pin 8 of the High Voltage module turning it on The High Voltage module produces 15 k...

Page 29: ... Line Blanking pulse HPUL This signal is used as the system clock which is used by the convergence spline processor CSP and the three digital to analog converters DACS Therefore the convergence correction waveforms are synchronized to the deflection system of the television set Operational amplifier 7001 is used as an inverting two pole Sallen_Key filter which acts as the loop filter Transistor 70...

Page 30: ...Circuit Description GB 96 A10PTV2 0 NTSC 9 Figure 9 20 Figure 9 21 CL 06532143_027 eps 081100 CL 06532143_028 eps 081100 ...

Page 31: ... supply from the Full Power Supply When the set is turned off the Standby line goes high causing Pin 5 of 7402 to be approximately 40 volts This shuts the Amplifier completely off preventing a POP in the speakers When the set is turned On the Standby line is High turning 7405 Off switching 7410 On The Sound Enable line is High turning 7401 On Pin 5 of 7402 will then be approximately 32 volts Audio...

Page 32: ...low If this line goes low the 130 volt supply should appear on Pin 2 of 1518 In addition the 5 2 volt 32 volt and 32 volt supplies should all appear If they do not appear check the Main B on Pin 3 of 1500 The Main and Standby B from the Power Factor Correction Panel is separate It is possible to have one and not the other If the Standby line goes low and the Main B is present the Large Signal Pane...

Page 33: ... Filament supply voltage FM Field Memory or Frequency Modulation FRONT C Front input chrominance SVHS FRONT DETECT Front input detection FRONT Y_CVBS Front input luminance or CVBS SVHS G SC1 IN Green AV1 in G SC2 IN Green AV2 in G TXT Green teletext HA Horizontal Acquisition horizontal sync pulse coming out of the BOCMA HFB Horizontal Flyback Pulse horizontal sync pulse from large signal deflectio...

Page 34: ...s No parity Eight bit Reception and Transmit SSB Small Signal Board STBY Standby SW Subwoofer TXT Teletext P microprocessor VA Vertical Acquisition V BAT Main supply for deflection VFB Vertical Flyback Pulse vertical sync pulse coming from the feature box VL Variable Level out processed audio output towards external amplifier WYSIWYR What You See Is What You Record record selection that follows ma...

Page 35: ...010 02321 SILICON INSULATOR SP600 1300 4822 253 30474 19181I1 5 00A 1302 2422 086 10786 FUSE RADIAL4AMP 1500 2422 025 10648 CON BM V 8P M 3 96 VH B 1504 2422 025 16153 CONNECTOR4PINBOARD 1505 2422 025 16153 CONNECTOR4PINBOARD 1506 2422 025 16153 CONNECTOR4PINBOARD 1508 2422 025 14409 CONNECTOR3PINBOARD 1510 4822 267 10565 4P 1516 2422 025 08333 CON BM V 12P M 2 50 EH B 1518 2422 025 08333 CON BM V...

Page 36: ...W 3458 4822 117 11449 2k2 5 0 1W 0805 3500 4822 051 20472 4k7 5 0 1W 3501 4822 117 10833 10k 1 0 1W 3503 4822 051 20124 120k 5 0 1W 3504 4822 051 20124 120k 5 0 1W 3505 4822 116 83872 220W 5 0 5W 3506 4822 051 20124 120k 5 0 1W 3507 4822 116 83884 47k 5 0 5W 3508 4822 116 52276 3k9 5 0 5W 3509 4822 050 21003 10k 1 0 6W 3510 4822 116 52285 470k 5 0 5W 3511 4822 117 10833 10k 1 0 1W 3550 4822 117 11...

Page 37: ...4822 252 60151 DSP 501N A21F 1871 4822 267 10557 B10B EH A 1872 2422 025 10646 CON BM V 02P M 3 96 VH B 1873 2422 025 10646 CON BM V 02P M 3 96 VH B 1875 4822 267 10973 CONN 1P 2701 4822 121 70162 10nF 5 400V 2702 4822 121 70162 10nF 5 400V 2705 4822 126 14053 1nF 10 2KV 2717 4822 124 12126 10mF 20 400V 2720 4822 124 40248 10mF 20 63V 2721 5322 121 42386 100nF 5 63V 2722 2020 557 90147 DC B 500V S...

Page 38: ... 122 31647 1nF 10 63V 2078 5322 122 31647 1nF 10 63V 2079 4822 126 14107 330nF 80 20 25V 2080 4822 124 40433 47mF 20 25V 2082 5322 122 31647 1nF 10 63V 2201 5322 122 31863 63V 330pF PM5 2203 5322 122 31863 63V 330pF PM5 2206 5322 122 31863 63V 330pF PM5 2208 5322 122 31863 63V 330pF PM5 2211 5322 122 32531 100pF 5 50V 2217 5322 122 32531 100pF 5 50V 2219 5322 122 32658 22pF 5 50V 2224 4822 126 145...

Page 39: ...0102 1k 2 0 25W 3124 4822 051 10102 1k 2 0 25W 3125 4822 051 10102 1k 2 0 25W 3126 4822 051 10102 1k 2 0 25W 3127 4822 051 10102 1k 2 0 25W 3201 4822 117 10353 150W 1 0 1W 3202 4822 117 13579 220k 1 0 1W RC12H 0805 3203 4822 051 10102 1k 2 0 25W 3204 4822 117 10834 47k 1 0 1W 3206 4822 117 10353 150W 1 0 1W 3207 4822 117 13579 220k 1 0 1W RC12H 0805 3208 4822 051 10102 1k 2 0 25W 3209 4822 117 108...

Page 40: ...67 8 2mH 5602 4822 157 70649 4 7mH NL322522T 4R7J 5603 4822 157 11893 5604 4822 157 62767 8 2mH 5605 4822 157 11893 5606 4822 157 62767 8 2mH 5607 4822 157 11231 LAN02TB1R0J 5608 4822 157 11231 LAN02TB1R0J 5609 4822 157 11231 LAN02TB1R0J 5700 4822 158 10604 6 8 mH 5701 4822 158 10604 6 8 mH 5702 4822 157 11737 22mH 10 9X9 5 6000 9340 332 80135 DIODEBB148 6001 4822 130 83757 BAS216 6002 4822 130 10...

Page 41: ... 4822 124 23002 10mF 16V 2453 5322 126 11583 10nF 10 50V 0603 2460 4822 124 23002 10mF 16V 2464 4822 051 30008 0R00 JUMPER 2601 4822 126 13881 470pF 5 50V 2602 4822 126 14305 100nF 10 16V 0603 2606 4822 124 23002 10mF 16V 2607 4822 126 13879 220nF 20 16V 2610 5322 126 11578 1nF 10 50V 0603 2611 5322 126 11578 1nF 10 50V 0603 2612 5322 126 11578 1nF 10 50V 0603 2613 5322 126 11578 1nF 10 50V 0603 2...

Page 42: ...nF 20 16V 2415 4822 126 13879 220nF 20 16V 2431 4822 126 14305 100nF 10 16V 0603 2432 4822 126 14305 100nF 10 16V 0603 2434 4822 126 14305 100nF 10 16V 0603 2436 4822 124 40207 100mF 20 25V 2437 3198 016 31020 0603 25V 1nF 2811 4822 126 14305 100nF 10 16V 0603 2812 4822 126 14305 100nF 10 16V 0603 2813 4822 122 33753 150pF 5 50V 2814 4822 126 13838 100nF 25V 20 2816 4822 124 40248 10mF 20 63V 2817...

Page 43: ... 4822 130 11564 UDZ3 9B 6802 4822 130 11564 UDZ3 9B 7201 2422 542 90077 TUNER TEDH9X700A F PIN B 7301 9352 638 72557 TDA8887H N1 7305 3198 010 42310 BC847BW 7307 3198 010 42310 BC847BW 7331 5322 130 42756 BC857C 7368 3198 010 42310 BC847BW 7385 3198 010 42310 BC847BW 7386 3198 010 42310 BC847BW 7401 5322 209 14481 HEF4053BT 7403 4822 209 17345 M62320FP 7411 3198 010 42310 BC847BW 7412 3198 010 423...

Page 44: ...22 015 19072 CONNECTOR 1002 2422 127 00485 SLIDESWITCH4PGF642B 1321 4822 265 11557 5P 1449 2422 025 15779 CONNECTOR5PINBOARD Mains Switch Panel Various 1000 4822 267 10966 CONN 2P 1001 4822 276 14024 SW POWER 2P 4 128A 1002 4822 267 10966 CONN 2P IR LED Various 0150 3135 017 04202 HOUSING FRONT CONTROL PTV 0160 4822 502 30439 PL3 X 8PAN 0170 3135 017 06751 KEYPAD 0180 3135 017 06761 ASSY KEYBOARD ...

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Philips A10PTV2.0, Service Manual

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