Philips L9.2A Service Manual Download

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Spare parts list

GB 66

L9.2A

10.

6401

4822 130 30621 1N4148

6402

4822 130 42488 BYD33D

6404

4822 130 32896 BYD33M

6405

4822 130 42488 BYD33D

6406

4822 130 30621 1N4148

6409

4822 130 42488 BYD33D

6410

4822 130 42488 BYD33D

6412

4822 130 42488 BYD33D

6413

4822 130 34197 BZX79-B12

6414

4822 130 83757 BAS216

6415

4822 130 83757 BAS216

6418

4822 130 30621 1N4148

6419

4822 130 30621 1N4148

6431

4822 130 30842 BAV21

6432

4822 130 30621 1N4148

6435

4822 130 83757 BAS216

6460

4822 130 42488 BYD33D

6461

4822 130 34142 BZX79-B33

6502

4822 130 31083 BYW55

6503

4822 130 31083 BYW55

6504

4822 130 31083 BYW55

6505

4822 130 31083 BYW55

6507

4822 130 31393 BYT52J

6507

4822 130 42606 BYD33J

6508

4822 130 31393 BYT52J

6508

4822 130 42606 BYD33J

6537

4822 130 30842 BAV21

6540

4822 130 30842 BAV21

6550

4822 130 10218 BY229X-800

6560

4822 130 10871 SBYV27-200

6570

4822 130 10256 EGP20DL-5300

6600

4822 130 11366 BZX284-C3V9

6601

4822 130 10852 BZX284-C6V8

6612

4822 130 34278 BZX79-B6V8

6669

4822 130 34233 BZX79-B5V1

6953

4822 130 10756 BZX284-C2V7

7010

4822 209 90008 L78M05CP

7116

4822 130 60511 BC847B

7118

4822 130 60511 BC847B

7206

4822 130 60373 BC856B

7250

4822 209 16775 TDA8842/N2/S1

7252

4822 130 60373 BC856B

7253

4822 130 60373 BC856B

7256

4822 130 60511 BC847B

7265

4822 130 40981 BC337-25

7266

4822 130 60511 BC847B

7311

4822 130 41782 BF422

7312

4822 130 41782 BF422

7313

4822 130 41646 BF423

7321

4822 130 41782 BF422

7322

4822 130 41782 BF422

7323

4822 130 41646 BF423

7331

4822 130 41782 BF422

7332

4822 130 41782 BF422

7333

4822 130 41646 BF423

7400

4822 130 41782 BF422

7401

4822 130 60373 BC856B

7402

4822 130 11575 BUT11APX

7431

4822 130 60373 BC856B

7460

4822 209 13176 TDA9302H

7469

4822 130 60511 BC847B

7518

4822 130 10806 STP6NA60FI

7520

4822 209 15684 MC44603AP

7600

4822 209 17537 SAA5563/M2A/0018

7600

4822 209 17538 SAA5542PS/M2A/0017

7600

9352 636 28112 IC SAA5563PS/M2/0037

7601

4822 209 15546 ST24W08B6

7602

4822 130 41109 BD135-16

7605

4822 130 60511 BC847B

7607

5322 209 60154 NE555D

7608

4822 209 73852 PMBT2369

7609

4822 130 60511 BC847B

7610

4822 130 60511 BC847B

7611

4822 130 60511 BC847B

7612

4822 130 41109 BD135-16

7620

4822 130 40959 BC547B

7621

4822 130 60511 BC847B

7680

4822 218 12055 TSOP2836UH1

7951

4822 130 60511 BC847B

7952

4822 130 60511 BC847B

7953

4822 209 90462 TDA7056B/N1

7955

4822 130 60511 BC847B

7956

4822 130 60373 BC856B

CRT[B]

Various

0254

4822 267 20466 Conn. 9p

0254

4822 255 70293 CRT socket 14" ANS

1015

3139 178 03401 CRT PANEL 14 "

1015

3139 178 03391 CRT PANEL 20"

1015

3139 177 19321 CRT PANEL 21"

2313

4822 122 33216 270pF 5% 50V

2323

4822 122 33172 390pF 5% 50V

2331

5322 122 31863 330pF 5% 63V

2341

4822 126 14588 2.2nF 10% 1KV

2342

4822 121 43526 47nF 5% 250V

2343

4822 121 43526 47nF 5% 250V

3311

4822 051 10102 1k 2% 0.25W

3312

4822 117 13577 330

Ω

1% 1.25W

3313

4822 051 20109 10

Ω

5% 0.1W

3314

4822 053 12183 18k 5% 3W

3316

4822 052 10221 220

Ω

5% 0.33W

3317

4822 052 11152 1k5 5% 0.5W

3321

4822 051 10102 1k 2% 0.25W

3322

4822 117 13577 330

Ω

1% 1.25W

3323

4822 051 20109 10

Ω

5% 0.1W

3324

4822 053 12183 18k 5% 3W

3326

4822 052 10221 220

Ω

5% 0.33W

3327

4822 052 11152 1k5 5% 0.5W

3331

4822 051 10102 1k 2% 0.25W

3332

4822 117 13577 330

Ω

1% 1.25W

3333

4822 051 20109 10

Ω

5% 0.1W

3334

4822 053 12183 18k 5% 3W

3336

4822 052 10221 220

Ω

5% 0.33W

3337

4822 052 11152 1k5 5% 0.5W

3341

4822 052 11152 1k5 5% 0.5W

3347

4822 052 10102 1k 5% 0.33W

3348

4822 052 11152 1k5 5% 0.5W

3349

4822 052 10108 1

Ω

5% 0.33W

3349

4822 052 10128 1

Ω

2 5% 0.33W

3349

4822 052 10158 1

Ω

5 5% 0.33W

3350

4822 052 10108 1

Ω

5% 0.33W

3350

4822 052 10128 1

Ω

2 5% 0.33W

3350

4822 052 10158 1

Ω

5 5% 0.33W

5341

4822 157 51157 3.3

5341

4822 157 71401 27

5341

4822 158 10604 6.8

5342

4822 526 10704 100mH z

6311

4822 130 30842 BAV21

6321

4822 130 30842 BAV21

6331

4822 130 30842 BAV21

6341

4822 130 30842 BAV21

6342

4822 130 30621 1N4148

6343

4822 130 11666 BZX284-C8V2

7311

4822 130 41782 BF422

7312

4822 130 41782 BF422

7313

4822 130 41646 BF423

7321

4822 130 41782 BF422

7322

4822 130 41782 BF422

7323

4822 130 41646 BF423

7331

4822 130 41782 BF422

7332

4822 130 41782 BF422

7333

4822 130 41646 BF423

Sound[D]

Various

0239

4822 267 11052 Conn. 17P

0240

4822 267 11052 Conn. 17P

0248

4822 267 31673 HEADPHONE PLUG

1801

4822 242 10769 crystal 18.432MHz

2801

5322 122 32658 22pF 5% 50V

2804

4822 122 33926 12pF 50V

2805

5322 126 10225 1P5 5%

2806

5322 126 10225 1P5 5%

2807

4822 126 14076 220nF 20% 25V

2808

4822 126 14076 220nF 20% 25V

2809

4822 126 14076 220nF 20% 25V

2810

4822 126 14076 220nF 20% 25V

2814

4822 126 13838 100nF 20% 50V

2815

4822 126 13692 47pF 1% 63V

2820

4822 124 40248 10

F 20% 63V

2821

4822 126 13838 100nF 20% 50V

2822

4822 124 40248 10

F 20% 63V

2823

4822 126 13838 100nF 20% 50V

2824

4822 124 40248 10

F 20% 63V

2825

4822 126 13838 100nF 20% 50V

2827

4822 124 40769 4.7

F 20% 100V

2828

5322 126 10511 1nF 5% 50V

2829

4822 124 40769 4.7

F 20% 100V

2830

5322 126 10511 1nF 5% 50V

2831

4822 124 40248 10

F 20% 63V

2835

4822 126 13838 100nF 20% 50V

2836

4822 126 13838 100nF 20% 50V

2837

4822 126 13692 47pF 1% 63V

2838

4822 126 13692 47pF 1% 63V

2841

4822 124 40207 100

F 20% 25V

2842

4822 124 40207 100

F 20% 25V

2950

4822 124 81151 22

F 50V

2951

4822 124 40248 10

F 20% 63V

2952

4822 122 33891 3.3nF 10% 63V

2953

4822 126 14076 220nF 20% 25V

2954

5322 121 42386 100nF 5% 63V

2955

4822 124 11767 470

F 20% 25V

2958

4822 126 13692 47pF 1% 63V

2959

4822 126 13692 47pF 1% 63V

2960

4822 126 13692 47pF 1% 63V

2961

4822 126 13692 47pF 1% 63V

2962

4822 122 33891 3.3nF 10% 63V

2963

4822 126 14076 220nF 20% 25V

2965

4822 126 14076 220nF 20% 25V

3807

4822 116 52175 100

Ω

5% 0.5W

3808

4822 116 52175 100

Ω

5% 0.5W

3809

4822 117 10834 47k 1% 0.1W

3810

4822 051 20101 100

Ω

5% 0.1W

3811

4822 051 20101 100

Ω

5% 0.1W

3812

4822 052 10688 6

Ω

8 5% 0.33W

3950

4822 051 20273 27k 5% 0.1W

3953

4822 051 20332 3k3 5% 0.1W

4xxx

4822 051 10008 0

Ω

5% 0.25W

4xxx

4822 051 20008 0

Ω

5% 0.25W

5801

4822 157 50965

5811

4822 157 51462 10

H 10%

5812

4822 157 51462 10

H 10%

5813

4822 157 51462 10

H 10%

5814

4822 157 53139 4.7

6801

4822 130 30621 1N4148

6802

4822 130 34382 BZX79-B8V2

6953

5322 130 31504 BZX79-B3V3

7803

4822 209 17461 MSP3415D-PP-A2

7953

4822 209 13646 TDA7057AQ/N2

7956

4822 130 60373 BC856B

Side AV [E]

Various

0021

3139 124 26931 SIDE AV Bracket

0250

4822 265 11606 Conn. 3P

Summary of Contents for L9.2A

Page 1: ...1 Supply voltage diagram 25 Blockdiagram 26 Testpointsoverview and oscillograms 27 7 Electrical diagram s en PWB s Diagram PWB Power supply Diagram A1 28 34 37 Diversity table A1 29 Horizontal deflection Diagram A2 30 34 37 Vertical deflection Diagram A3 31 34 37 Synchronisation Diagram A4 31 34 37 Tuner en video IF TDA 8844 Diagram A5 32 34 37 Diversity table A5 33 Video processing Diagram A6 38 ...

Page 2: ...6C AI PAL 1 2 Specification of the terminal sockets 1 3 Specification of the terminal sockets 1 3 1 Inputs AV1 AV2 and Side AV Cinch CVBS yellow 1Vpp 3dB 75Ω q Cinch Audio R red 0 2 2VRMS 10kΩ q Cinch Audio L white 0 2 2VRMS 10kΩ q 1 3 2 Outputs MONITOR out Cinch CVBS yellow 1Vpp 3dB 75Ω q Cinch Audio R red 0 5VRMS 1kΩ q Cinch Audio L white 0 5VRMS 1kΩ q 1 3 3 Headphone Jack 8 600 4mW t 1 3 4 SVHS...

Page 3: ...o avoid touching the CRT hot components or heat sinks The electrical DC resistance between the mains plug and the secondary side should be checked only for sets which have a mains isolated power supply This check can be done as follows Unplug the mains cord and connect a wire between the two pins of the mains plug Set the mains switch to the on position keep the mains cord unplugged Measure the re...

Page 4: ...nt of this unit during repair is therefore not recommended 6 Be careful during measurements in the high voltage section and on the picture tube 7 Never replace modules or other components while the unit is switched on 8 When making settings use plastic rather than metal tools This will prevent any short circuits and the danger of a circuit becoming unstable 9 Wear safety goggles during replacement...

Page 5: ...Directions for use GB 5 L9 2A 3 3 Directions for use ...

Page 6: ...Directions for use GB 6 L9 2A 3 ...

Page 7: ...Directions for use GB 7 L9 2A 3 ...

Page 8: ...Directions for use GB 8 L9 2A 3 ...

Page 9: ...Directions for use GB 9 L9 2A 3 ...

Page 10: ...Directions for use GB 10 L9 2A 3 ...

Page 11: ...Directions for use GB 11 L9 2A 3 ...

Page 12: ...Directions for use GB 12 L9 2A 3 ...

Page 13: ...Directions for use GB 13 L9 2A 3 ...

Page 14: ... Test points for the frame deflection circuit A3 I1 I2 I3 etc Test points for the Tuner Video IF circuit A5 L1 L2 L3 etc Test points for the Line deflection circuit A2 P1 P2 P3 etc Test points for the power supply A1 S1 S2 S3 etc Test points for the synchronisation circuit A4 V1 V2 V3 etc Test points for the video processing circuit CRT panel A6 CRT panel B Measurements are performed under the fol...

Page 15: ...NU key again will return to the last SDM status Error buffer Pressing the OSD button on the remote control shows all OSD incl error buffer Access to SAM By pressing the CHANNEL DOWN and VOLUME DOWN buttons on the local keyboard simultaneously or pressing ALIGN on theDST DST the set switches from SDM to SAM In the SDM the following information is displayed on the screen Figure 5 3 Service Default M...

Page 16: ...ter the normal user menu TV lock installation brightness colour and contrast while SAM remains displayed in top of screen Pressing the MENU key again will return to the last SAM status Pressing the OSD button of the remote control shows only SAM in the top of screen Access to SDM Pressing the DEFAULT button on the DST SAM menu control Menu items AKB VSD Tuner White tone Geometry and Audio can be s...

Page 17: ... from left to right when an error occurs that is not yet in the error code buffer the error is written at the left side and all other errors shift one position to the right the error code buffer will be cleared in the following cases 1 exiting SDM or SAM with the Standby command on the remote control 2 transmitting the commands EXIT with the DST RC7150 3 transmitting the commands DIAGNOSE 9 9 OK w...

Page 18: ...e BIMOS 7250 D pin 40 A4 Synchronisation Timer IC 7607 or transitor 7608 is defect A7 Control 2 Note If the Collector of 7402 is shorted to the Emitter hick up noise can be heard from the power supplyIn this case the E W protection is disabled is correctly working a parabolic picture 3 Also take note of protection circuits in the line output stage If any of these circuits are activated the set wil...

Page 19: ...ys 1 Communication to the television automatic 2 Asking questions to you manually ComPair combines this information with the repair information in its database to find out how to repair the L9 2A Automatic information gathering Reading out the error buffer ComPair can automatically read out the contents of the entire error buffer Diagnosis on I2C level ComPair can access the I2C bus of the televis...

Page 20: ...red LED on the Compair interface wil light up 12 Switch on the television set with the mains switch 13 When the set is in standby Click on Start up in ComPair mode from standby in the ComPair L9 2A fault finding tree otherwise continue Figure 5 7 Figure 5 8 The set has now started up in ComPair mode Follow the instruction in the L9 2A fault finding tree to diagnose the set Note that the OSD works ...

Page 21: ...ddle of the screen till this line is just not visible The alignment of the VG2 has been completed Switch the set to Standby The values adapted at the BRIGHTNESS and the CONTRAST menu during the alignment will change back again to their default values 8 2 2 Focusing Set pattern generator e g PM5418 with Circle and Small Squares pattern and connect to aerial input with RF signal amplitude 10mv Adjus...

Page 22: ...pically this is for Secam LL The default values for these option codes are CL 4 YD 12 IF PLL OFFSET 48 8 3 5 White tone Connect a pattern generator e g PM5418 and set it to colour bar and circle pattern Set frequency for PAL 475 25MHz or 61 25MHz for BTSC with RF signal amplitude 10mv and connect to tuner aerial input Enter the SAM MENU Enter into WHITE TONE menu select item NORMAL DELTAWARM or DE...

Page 23: ...g for games possible when enabled HS Hospital Mode Possibility to block the local keyboard when enabled HT Hotel Mode Possibility to pre select the channel numbers when enabled IS Incredible Surround Incredible surround function available when enabled LV Automatic Volume Leveller AVL Menu item AVL available when enabled NI No Ident Auto Standby Set switches to standby after 10min when NI enabled N...

Page 24: ... dead During T on FET 7518 conducts Energy is stored in the primary winding 2 5 of transformer T5545 by using a linear increasing primary current The slope depends on the rectified mains voltage present across C2508 The T on period is varied to provide regulation of the drive waveform at pin 3 of IC7520 By controlling the duty cycle of the SMPS in this way the VBATT is controlled During T off FET ...

Page 25: ...eing short circuited or loaded excessively the I prim becomes too high which is detected by pin 7 As a result the primary current is limited to its maximum value and the secondary voltages will drop The voltage at pin 1 which is coupled with the output voltage will also drop When the voltage at pin 1 drops below the 9V IC7520 will stop functioning and the output voltage will rapidly drop to zero V...

Page 26: ...urther demodulation All variants of 2CS are demodulated in this IC Figure 9 11 2CS Audio signals coming from the frontpanel are connected to pin 49 50 of IC7803 for the Ext1Audio signals while pin 52 53 of IC 7861 are used for the Ext2Audio signals IC 7803 performs source selection as well as audio processing such as volume balance tone control mute spatial stereo incredible surround sound and SMA...

Page 27: ...ss see software alignment adjustments 9 5 6 PLL demodulator The IF signal is demodulated with the assistance of the PLL detector The video IF demodulator can handle both negative and positively modulated IF signals selection is achieved via the IIC bus bit MOD 9 5 7 Video buffer The video buffer is present to provide a low ohmic video output with the required signal amplitude Additionally it provi...

Page 28: ...r outputs R Y and B Y are present at pin 28 29 30 of the TV processor The auto system manager identifies PAL NTSC and SECAM colour standards and is controllable via the IIC bus Connected on pin 36 of the TV processor is the Loop Filter for the phase detector The filter chosen provides an optimal transient response which ensures both an optimum for noise bandwidth and colour acquisition time 9 6 5 ...

Page 29: ...l the signal EHT_info is used This signal is a measurement of the picture contents It is filtered by 3253 2227 As the time constant of the filter is much bigger than the frame period time the DC at the anode of 6212 represents the average value of the picture content Via 6212 and 2226 the DC voltage at pin 22 is slowly clamped For peak white limiting transistor 7263 is utilised When peak white occ...

Page 30: ... controller KeyBd1 Local keyboard control signal to micro controller KeyBd2 Local keyboard control signal to micro controller In protection mode KeyBd2 is Ground KeyBd3 Local keyboard control signal to micro controller L Power amplifier output to headphone and speaker L Power amplifier output to speaker LED LED control signal from micro controller to LED LATAM Latin America schematic PCB informati...

Page 31: ... Power Supply STANDBY Switching signal from micro controller low for standby power supply will be switched to stand by mode high for normal operation SW_OUT Selected Output signal from source SYNC Synchronisation TBD To Be Defined TREBLE Control signal for treble TXT Teletext µC Micro controller USA United States schematic PCB information only applicable for North American sets V_TUNE Tuning volta...

Page 32: ... 2407h 4822 121 70637 8 2nF 5 1600V 2408 4822 122 30103 22nF 20 63V 2409 4822 124 11575 47µF 20 160V 2410 4822 124 11767 470µF 20 25V 2411 4822 124 40255 100µF 20 63V 2412 4822 121 51385 33nF 20 100V 2413 4822 124 11845 22µF 20 250V 2414 4822 124 81145 1000µF 20 16V 2415 4822 124 81145 1000µF 20 16V 2416h 4822 126 11503 820pF 10 2KV 2416h 4822 126 12263 220pF 10 2KV 2416h 4822 126 13864 330pF 10 2...

Page 33: ... 1W 3517 4822 050 21003 10k 1 0 6W 3518 2120 106 90549 0Ω27 5 3520 4822 117 11149 82k 1 0 1W 3521 4822 116 52219 330Ω 5 0 5W 3524 4822 051 20008 jumper 0805 3525h 4822 052 10229 22Ω 5 0 33W 3528 4822 116 83868 150Ω 5 0 5W 3529 4822 050 24708 4Ω7 1 0 6W 3530 4822 116 52276 3k9 5 0 5W 3532 4822 117 11507 6k8 1 0 1W 3534 4822 117 13579 220k 1 0 1W 3536 4822 051 20273 27k 5 0 1W 3537 4822 117 10833 10...

Page 34: ...0Ω 5 0 1W 3324 4822 053 12183 18k 5 3W 3326h 4822 052 10221 220Ω 5 0 33W 3327 4822 052 11152 1k5 5 0 5W 3331 4822 051 10102 1k 2 0 25W 3332 4822 117 13577 330Ω 1 1 25W 3333 4822 051 20109 10Ω 5 0 1W 3334 4822 053 12183 18k 5 3W 3336h 4822 052 10221 220Ω 5 0 33W 3337 4822 052 11152 1k5 5 0 5W 3341 4822 052 11152 1k5 5 0 5W 3347h 4822 052 10102 1k 5 0 33W 3348 4822 052 11152 1k5 5 0 5W 3349h 4822 05...

Page 35: ...31673 HEADPHONE PLUG 0253 4822 267 31673 HEADPHONE PLUG g 2171 4822 126 13512 330pF 10 50V 2172 4822 126 13512 330pF 10 50V f 3150 4822 116 83884 47k 5 0 5W 3151 4822 050 11002 1k 1 0 4W 3152 4822 116 83884 47k 5 0 5W 3153 4822 050 11002 1k 1 0 4W ...

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Philips L9.2A, Service Manual

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