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Philips MG5.1E Service Manual
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Philips MG5.1E Service Manual

Philips MG5.1E Service Manual

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Colour Television

©
Copyright reserved 1999 Philips Consumer Electronics B.V. Eindhoven, The
Netherlands. All rights reserved. No part of this publication may be reproduced,
stored in a retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by LM 9972 Service PaCE
Contents
Printed in the Netherlands
MG5.1E
Page
2
8
9
11
24
29
69
72
74
75
80
Subject to modification
Chassis
AA
5 3122 785 10053

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Summary of Contents for Philips MG5.1E

  • Page 1: Table Of Contents

    Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. 5 3122 785 10053...

  • Page 2: Mg99 Light Path

    1. MG99 Light path MG5.1E MG99 Light path MIRROR R+G+B GREEN BLUE FRESNAL LENTICULAR LENS SCREEN CL 96532100_078.eps 121199 Figure 1-1 The MG99 Projection TV uses three single color tubes, Red, Green, and Blue. (Figure 1-1) The output of each tube is...
  • Page 3 MG5.1E 1. MG99 Light path BLACK STRIPING OUTPUT CL 96532100_079.eps LIGHT 111199 Figure 1-2 The Lenticular Lens Screen calumniates the light from the Fresnel Lens. (Figure 1-2) The Lenticular Lens increases Personal notes contrast by reducing the ambient light by the use of Black Striping.
  • Page 4 1. MG99 Light path MG5.1E C ELEMENT LENS CL 96532100_080.eps 111199 OUTPUT LENS LIQUID COOLANT Figure 1-3 The Three CRT's are driven by 30KV of high voltage and 15KV of focus voltage. (Figure 1-3) The Tube produces a highly Personal notes concentrated light output of color.
  • Page 5 MG5.1E 1. MG99 Light path 1.1 MG99 LIGHT PATH PROBLEMS MG99 LIGHT PATH PROBLEMS CL 96532100_107.eps 021299 Figure 1-4 Look at the edges of the screen. They may be bowed inward. Personal notes PROBLEM - BOTTOM CORNERS DARK PROBLEM - BOTTOM CORNERS COLORED...
  • Page 6 1. MG99 Light path MG5.1E 1.1 MG99 LIGHT PATH PROBLEMS CL 96532100_109.eps 151199 Figure 1-5 Fresnel may be reversed. Carefully remove the fresnel and point the grooves toward the viewer. Personal notes PROBLEM - BRIGTH AND DARK LINES ON A WHITE FIELD...
  • Page 7 MG5.1E 1. MG99 Light path 1.1 MG99 LIGHT PATH PROBLEMS CL 96532100_110.eps 151199 Figure 1-6 The Fresnel offset is pointing down. The center of the Fresnel should be toward the top of the screen. Personal notes PROBLEM- UPPER CORNERS OF THE SCREEN DARK...

  • Page 8: Introduction

    The following sets will be sold in Europe: 46PP9501/05U.K. and Ireland 55PP9501/05U.K. and Ireland 46PP9501/12Western Europe 55PP9501/12Western Europe 46PP9501/58Eastern Europe 55PP9501/58Eastern Europe These units will be distributed from Philips Bundling Center in Bruges, Belgium.

  • Page 9: Overall Blockdiagram

    3. Overall blockdiagram MG5.1E Overall blockdiagram Y_CVBS SIDE JACK PANEL DELAY MODULE BLUE MG99 SMALL SIGNAL PANEL GREEN DRIVE CIRCUIT LEFT AUDIO AUDIO SPEAKER AMPLIFIER SWITCH RIGHT AUDIO CONV R, G, B, FB INTENSITY CONTROL CONV R, G, B, FB...
  • Page 10 3. Overall blockdiagram MG5.1E There are eleven PC boards in the MG99 chassis. (Figure 3-1) They are the Small Signal panel, Side Jack panel, Power Personal notes Supply panel, Interface panel, SVM module, Blue CRT panel, Green CRT panel, Red CRT panel, High Voltage Scan panel, and Convergence panel.

  • Page 11: Power Supply

    4. Power supply MG5.1E Power supply +5V STBY POWER STBY FACTOR POWER INPUT SWITCH CORRECTION SUPPLY CIRCUIT PANEL CIRCUIT +15V STBY +130V MAIN +33V SMPS POWER +35V SUPPLY -35V +15V ON/OFF -15V +5V2 +15V +8V6 +15V -7V7 -7V7 -15V CL 96532100_082.eps...
  • Page 12 MG5.1E 4. Power supply TO AC SW BD 1221 1000 5001 2000 3011 680n +5VSTBY 3004 3.3M 3007 6.8K 3005 7000 3.3M 50_60HZ 3008 3006 470K CL 96532100_083.eps 121199 Figure 4-2 The applied AC voltage is fed to a 5 amp fuse and then to the Mains switch on the AC switch panel.
  • Page 13 MG5.1E 4. Power supply CL 96532100_084.eps 011299 Figure 4-3...
  • Page 14 4. Power supply MG5.1E To troubleshoot the Standby Supply, first check the supply voltage on Pin 5 of 7211. If there is no secondary voltage and Personal notes 7211 is working correctly, startup pulses should be seen at Pin 5 of the IC. If the IC is pulsing and there is no secondary voltage, there is a problem with the outputs of 5202 or with the feedback circuit.
  • Page 15 MG5.1E 4. Power supply 4.1 European power factor correction circuit European power factor correction circuit AC IN BRIDGE LOAD AC CURRENT CAPACITOR CHARGE VOLTAGE CL 96532100_085.eps 121199 Figure 4-4 The input to most switching power supplies consists of a bridge rectifier and a large electrolytic capacitor.
  • Page 16 4. Power supply MG5.1E 4.1 European power factor correction circuit 5109 6103 AC INPUT BRIDGE 350V DC OUT 2110 REGULATOR CURRENT SENSE DRIVE 7104 7102 CL 96532100_086.eps 121199 Figure 4-5 The MG5.1 Power Factor correction circuit uses a Boost If the Boost regulator circuit should become inoperative, due to...
  • Page 17 MG5.1E 4. Power supply Full power factor correction circuit CL 96532100_087.eps 191199 Figure 4-6...
  • Page 18 4. Power supply MG5.1E 4.2 Full power factor correction circuit An explanation of the full Power Factor Correction circuit is now given. (Figure 4-6) The Power Factor Correction circuit is a Personal notes fixed-frequency Pulse-Width modulated boost regulator power supply. Operating frequency is approximately 60 kilohertz. Due to the low power consumption of the set during the standby mode, the Power Factor Correction circuit is turned Off.
  • Page 19 MG5.1E 4. Power supply Full power supply CL 96532100_088.eps 011299 Figure 4-7...
  • Page 20 4. Power supply MG5.1E 4.3 Full power supply When the set is turned On, the Main Switch Mode power supply is turned On. (Figure 4-7) This supply produces the +130 volt, Personal notes +33 volt, +35 volt, -35 volt, -15 volt, and +15 volt supplies.
  • Page 21 MG5.1E 4. Power supply Figure 4-8...
  • Page 22 4. Power supply MG5.1E 4.3 Full power supply The Power Factor Correction, Standby, and Full Power circuits are all located on the Power Supply panel. (Figure 4-8) The Personal notes Standby supply feeds the 5 volt standby supply to the Small Signal panel via Pin 5 of connector 121 0.
  • Page 23 MG5.1E 4. Power supply 4.3 Full power supply 5109 6103 AC INPUT BRIDGE 350V DC OUT 2110 REGULATOR CURRENT SENSE DRIVE 7104 7102 CL 96532100_086.eps 121199 Figure 4-9 The +15 volt source is fed to transistor 7308. (Figure 4-9) This is a Buck Switch regulator circuit which produces the 5.2 volt...
  • Page 24 5. SCAN CIRCUITS MG5.1E SCAN CIRCUITS5.1Line Drive CL 96532100_089.eps 121199 Figure 5-1...

  • Page 25: Scan Circuits

    MG5.1E 5. SCAN CIRCUITS 5.1 Line Drive Line Drive from the Small Signal panel is fed to connector 1509 Pin 1 and then to buffer transistor 7803. (Figure 5-1) Transistor Personal notes 7803 then drives the Line driver transistor 7801. Line drive is then fed to the Line output transistor 7802.
  • Page 26 5. SCAN CIRCUITS MG5.1E 5.2 Frame Drive circuit Frame Drive circuit 6550 VPUL 3554 +13V 100R 2557 2511 -13V 100n 100uF +15V 3595 3565 220R 3594 VERT FB GEN 7590 DRIVER DRIVER 100R 1511 3562 3592 2557 3593 3572 330R...
  • Page 27 MG5.1E 5. SCAN CIRCUITS High Voltage circuit CL 96532100_091.eps 121199 Figure 5-3...
  • Page 28 5. SCAN CIRCUITS MG5.1E 5.3 High Voltage circuit Line Drive (HPUL) from the Line Drive circuit is applied to the point where it is not usable. The High Voltage will then be transistor 7905 and then to Pin 3 of IC 7900. This Pulse is used shut down.

  • Page 29: Small Signal Panel

    New tools and service features The 'MG' chassis is the successor of the MD1, MD2, GFL- A lot of additional service “features” are built in the MG5.1E. chassis. The MG architecture is global and can be produced all These “features” can be addressed with a new tool called over the world.

  • Page 30: Block Diagram

    • • PICNIC For the MG5.1E blue mute is made via the PICNIC and perhaps in future sets from the OTC. The soundpart is built up around the MSP3410D (all versions have NICAM) for IF sound detection, sound controls, source select. The sound for the subwoofer is derived from L and R.
  • Page 31 CL 86532047_002.eps 140798 Figure 6-2 I2C bus. In MG5.1E three different I2C busses are used: Personal notes 1. Slow I2C bus (SCL/SDA-S); speed 100 kHz used for various IC's 2. Fast I2C bus (SCL/SDA-F); speed 400 kHz. (In the OTC there is only one hardware I2C bus.
  • Page 32 Blockdiagram deflection 140798 Figure 6-3 Explanation Large Signal (fig 6.2 + 6.3). In MG5.1E there is a separate Standby supply that is used to reduce the Standby Personal notes power. The main power supply is completely switched off via a relay and only the Standby supply is operational in Standby.
  • Page 33 MG5.1E 6. SMALL SIGNAL PANEL 6.2 Service Modes / ComPair Service Modes / ComPair Service Modes Personal notes In the MG the following service modes are available: • SAM (service alignment mode) • SDM (service default mode) • CSM (customer service mode) This looks very much alike the MD2.2.
  • Page 34 6. SMALL SIGNAL PANEL MG5.1E Control and TXT +5VSTBY MAINS-SWITCH PANEL 7012 3059 3054 TLUV 5300 470E SERVICE SEND ON/OFF receiver 5VSTBY 7009 +5V STBY 3V STBY SAA 5800 OTC 2.5 7006 STANDBY 7007 OSD/TXT FADING 100E AFC tuner HSEL (OPTIONAL)
  • Page 35 TXT information. In MG the RAM Remote Control (IC7001) of the microprocessor is also used for the TXT- In MG5.1E a new remote control is introduced which uses RC6, decoder. because new commands are used like cursor control in 8 directions.
  • Page 36 6. SMALL SIGNAL PANEL MG5.1E 6.3 Control and TXT Realisation of nexTView in MG5.1E MG5.1E knows two executions of nexTView called “This Personal notes Channel EPG” and “Multi Channel Composite EPG”. “Multi Channel Composite EPG” makes use of both Datastream 1 and Datastream 2.
  • Page 37 MG5.1E 6. SMALL SIGNAL PANEL SAA5800 pin description pin nr. pin name Description I/O Level pin nr. pin name Description I/O Level IREF_DEC Iref decouple analogue Address bit digital IREF Current reference input analogue Address bit digital REF+ ADC voltage reference...
  • Page 38 L’ sets with 6.5 MHz sound to suppress the neighbour channel. Two SAW filters are used: One for filtering picture-IF and the A new tuner is introduced for MG5.1E: UV1316 Mk2. The tuner second-one for sound-IF. The output of the tuner is controlled is I2C-controlled and has three bands: low/mid/high (see table).
  • Page 39 MG5.1E 6. SMALL SIGNAL PANEL 6.4 Tuner & IF signal can be checked. To realise quasi split sound the IF- signal is fed to the HIP on pin 63/64 via SAW-filters 1104/1105. Personal notes The FM (or AM for L-norm) -modulated signal is available on pin 5 and is fed to the audio demodulator MSP3410 (see chapter 6.5).
  • Page 40 6. SMALL SIGNAL PANEL MG5.1E Search command Start search Tuned to TV transmitter? System L'? System L'? L'frequencies covered Step to next L' Step 5 MHz in Step 250 kHz in frequency? 62.5 kHz sub-steps 62.5 kHz sub-steps Video recognition?
  • Page 41 MG5.1E 6. SMALL SIGNAL PANEL 6.4 Tuner & IF For search tuning two inputs are used: 1. Is there video recognition (sync detection (phi-1 lock) in the Personal notes HIP) 2. Is there a carrier (AFC crossing; PLL-lock) The complete tuning procedure is illustrated in fig 6.6, but this is all inside the HIP.
  • Page 42 6. SMALL SIGNAL PANEL MG5.1E 6.5 Sound MG5.1E Sound MG5.1E 7770 SEDSP *ONLY DOLBY BLACK CINCH 4800 4801 SUBW OOFER - RESET SUBW AUDIO DOLBY 7774 (*DOLBY SETS) 100 F AMPLIFIER 40/41 29 36 28 SELECT AUDIO CINCH 1/2 S bus...
  • Page 43 MG5.1E 6. SMALL SIGNAL PANEL 6.5 Sound MG5.1E the MSP3410 (IC7751) and the complete DOLBY PROLOGIC processing takes place in IC7770. Via the digital bus (I2S) the Personal notes decoded left/right is fed back to the MSP3410 where L/R data is converted to analogue signals.
  • Page 44 6. SMALL SIGNAL PANEL MG5.1E 6.6 HIP, I/O select, Video processing HIP, I/O select, Video processing FE CVBS CVBS FE OUT 7501/TDA9320 H CVBS FRONT-END CVBS INT CVBS 1 (SC 1) CVBS 1 R1 IN G1 IN (SC 1) B1 IN...
  • Page 45 MG5.1E 6. SMALL SIGNAL PANEL 6.6 HIP, I/O select, Video processing 7501/TDA9320H Tuner Main CVBS main read_status 1 Ext 1 read_status 2 (Easylink) Ext 2 PROC TOPIC proc Ext 3 COMB Comb control Front Peaking FBL1 FBL2 set_rgb_main rgb1 rgb2...
  • Page 46 6. SMALL SIGNAL PANEL MG5.1E 6.6 HIP, I/O select, Video processing FBL EXT 1 EXT 2 RGB/YUV CVBS/TERR Y/CVBS VIDEO SYNC SWITCH PROC IDENT FBL EXT 2 Y FEAT Y/CVBS FROM U FEAT FILTERS DELAY SWITCH V FEAT SWITCH C/CVBS...
  • Page 47 MG5.1E 6. SMALL SIGNAL PANEL 6.7 Featurebox Featurebox BUS A BUS B BUS C Y DEC Y FEAT U DEC U FEAT V DEC V FEAT PICNIC/7609/SAA4978H 100Hz CONFIGURATION CL 86532047_021.eps 140798 Figure 6-11 100 Hz featuring Personal notes In the MG-chassis the featurebox is integrated on the small signal panel.
  • Page 48 Digital Scan featuring To the PICNIC external ICs are connected dependent of the features. If MG5.1E has only 100Hz then only one memory-IC is used to store one frame. For sets with digital scan the PROZONIC (IC7608 SAA4990H) has been added with two...
  • Page 49 Figure 6-13 Introduction Personal notes The TOPIC is an optional IC. It is not used in all MG5.1E sets. The first introduced sets will not have it. The PICNIC delivers the 100Hz YUV signal to the TOPIC (IC7402 TDA9178). The...
  • Page 50 6. SMALL SIGNAL PANEL MG5.1E 6.8 The TOPIC (The most Outstanding Picture improvement IC) PAL-SIGNAL FIELD A VIDEO INPUT SANDCASTLE INPUT V-PULSE INTERNAL NOISE DETECTOR MEASURE CL 86532047_024.eps 140798 Figure 6-14 The different items are explained now: • Blue stretch: Colours close to white are changed a little 1.
  • Page 51 MG5.1E 6. SMALL SIGNAL PANEL 6.9 The HOP High-end Output Processor The HOP High-end Output Processor IC 7300 / TDA9330H Y, U, V FEAT RGB PIP VIDEO CONTROL RGB TXT TDA 9330 AH HOP DAC SUPPLY H O P EW-DRIVE...
  • Page 52 6. SMALL SIGNAL PANEL MG5.1E 6.9 The HOP High-end Output Processor 7300 / TDA9330H CL 86532047_026.eps 051098 Figure 6-16 See figure 6-16 The YUV-input is converted to RGB-outputs. The RGB and fast Personal notes blanking signals from PIP (or dual screen) are fed to the pins 30-33.
  • Page 53 MG5.1E 6. SMALL SIGNAL PANEL 6.9 The HOP High-end Output Processor BEAMCURRENT SWITCH-OFF PRINCIPLE Amplifiers TDA9320H (Mirror) BLC-INFO 3428 6429 3429 3430 FBCSO 7438 CL 86532047_027.eps 051098 Figure 6-17 Beam current switch off circuitry (see fig 6-17) The beam current switch off circuitry reduces the high tension...
  • Page 54 6. SMALL SIGNAL PANEL MG5.1E 6.9 The HOP High-end Output Processor U FEEDBACK UCOB UCOG UCOR ANODE 20 A FRAME 1 FRAME 2 CL 86532047_028.eps 140798 Figure 6-18 Two measurements are used: First a current of 8 uA (for cut-off)
  • Page 55 MG5.1E 6. SMALL SIGNAL PANEL 6.9 The HOP High-end Output Processor U FEEDBACK R G B FRAME 1 FRAME 2 CL 86532047_029.eps 140798 Figure 6-19 Personal notes...
  • Page 56 6. SMALL SIGNAL PANEL MG5.1E 6.9 The HOP High-end Output Processor 16µsec;δ; 50% ∼ ∼ TIME DRIVE SIGNAL VEHT [kV] 15kV 150msec START HOP TIME SLOW START LINESTAGE CL 86532047_030.eps 061098 Figure 6-20 All geometry control is done via I2C and the data is stored in the NVM (IC7008) of the SSP.
  • Page 57 MG5.1E 6. SMALL SIGNAL PANEL 6.9 The HOP High-end Output Processor 16µsec (δ; 50%) ∼ ∼ TIME DRIVE SIGNAL TIME VEHT [kV] 32kV 38ms 42ms STOP HOP TIME SLOW STOP LINESTAGE CL 86532047_031.eps 061098 Figure 6-21 Protections/detections: • VFB protection If vertical flyback is missing or if the VFB •...
  • Page 58 Protection Personal notes Introduction In fig 17.1 the protection diagram is drawn. MG5.1E has only one microprocessor (OTC) . The microprocessor and the NVM are supplied with 3.3V, also in Standby mode. The Standby- command from the OTC is fed to TS7000/7001 that switches on the main power supply via relay 1002.
  • Page 59 MG5.1E 6. SMALL SIGNAL PANEL C drivers Start Start cond. OK Free the bus General I Slow (65) Send adres data error Fast (66) Check ACKN device Stop blocked Free bus Device I C error Slow Fast NVM-bus TEA 6422...
  • Page 60 6. SMALL SIGNAL PANEL MG5.1E 6.10 Protection structure Protections via I2C When the TV-set is on then every 200msec a number of Personal notes registers are refreshed. I2C protection becomes active if one of the SDA- or SCL-lines has short-circuit to earth or there is a short-circuit between SDA and SCL.
  • Page 61 MG5.1E 6. SMALL SIGNAL PANEL Software filter protections on OTC Input from DC prot BC prot 8V6 - 5V2 Prot counter = 0 start 200ms timer ESD refresh Read HOP status Flash refresh Check Prot at 200ms timer Prot active?
  • Page 62 6. SMALL SIGNAL PANEL MG5.1E 6.10 Protection structure Protections via inputs of the OTC (see flow chart) The inputs of the OTC are ESD-protected by means of diodes Personal notes (BAW56). The cathodes of these diodes are a good test points for these inputs.
  • Page 63 MG5.1E 6. SMALL SIGNAL PANEL E.W. drive 6480 3483// 3484 6485 3490 3493 6344 START/ 3491 STOP H DRIVE 220K (73) 3492 3340 6340 6341 EHT info 7341 (FLASH) 6350 3350 7351 (74) BC-prot 3352 3353 CL 86532047_038.eps 061098 Figure 6-25...
  • Page 64 6. SMALL SIGNAL PANEL MG5.1E 6.10 Protection structure The following protections are implemented: • 8V6 and 5V2 protection (fig 6-22). The pins 105 and 106 Personal notes sense the voltages. If one of them is absent, the protection will be activated.
  • Page 65 MG5.1E 6. SMALL SIGNAL PANEL HFB horizontal fly-back Hdefl ϕ2 (71) 7421 5410 2420 Hdrive 3353 2419 VFB vertical fly-back 6758 ϕ2 (70) 100µ 7600 Flyback Vpos Vneg Thermal prot Vdefl CL 86532047_039.eps 140798 Figure 6-26...
  • Page 66 6. SMALL SIGNAL PANEL MG5.1E 6.10 Protection structure Protections via HOP Personal notes The following protections are present: • LDP (line deflection protection). Two protection lines come in on pin 5 of the HOP (fig 6-25): – Flash detection is detected via D6341 and TS7341. In case of a flash pin 5 becomes high and the Horizontal Drive (HD) stops.
  • Page 67 MG5.1E 6. SMALL SIGNAL PANEL 6.10 Protection structure Vbatt Main 7556 supply + Vs (16V) 1002 STANDBY + DC PROT 6570 7550 7001 7000 220V 6571 AUDIO DCprot (76) 7762 +7V7 µP 7761 7796 5VST-by 2700 -7V7 CL 86532047_040.eps 140798 Figure 6-27 Service mode via 0356 connector SSP.
  • Page 68 6. SMALL SIGNAL PANEL MG5.1E 6.10 Protection structure Stepwise shutdown explanation In the stepwise shutdown mode, state 2 is skipped. (ICs can not Personal notes be de-initialised). Mode Description mode Display leds (Note *) Prot. de-acti- / State vated TV operates, unblanked...

  • Page 69: Crt Drive Circuit

    MG5.1E 7. CRT Drive Circuit CRT Drive Circuit TO SCAN HV PANEL 1882 240V GREEN BLUE PANEL PANEL PANEL FIL LO +12V FIL HI FIL HI +12V FIL LO BLUE +240V 1883 1083 INTERFACE PANEL CL 96532100_094.eps 121199 Figure 7-1 Red, Green, and Blue drive from the Small Signal panel is fed to the CRT drive circuit on the Interface panel.
  • Page 70 7. CRT Drive Circuit MG5.1E Figure 7-2 Green drive from the Interface Panel is fed to transistor 7802. (Figure 7-2) The 12 volt source turns transistor 7801 On to Personal notes switch drive to the cathode of the CRT Transistor 7803 sets the bias level for the emitter of 7802.
  • Page 71 MG5.1E 7. CRT Drive Circuit +12V 3121 680R +12V +12V 3122 5006 680R 3127 3120 330R +12V 5005 5004 5003 2047 3126 7028 100p 3125 1304-8 100R 1366-2 2048 2049 2060 7029 7027 3124 3119 FROM 330R 100R SMALL SIGNAL...

  • Page 72: Interface Panel

    8. Interface panel MG5.1E 8.1 Data line switching Interface panel8.1Data line switching 3012 1375-2 TO CONVERGENCE 7007 1360-1 3011 7006 3010 3015 1375-4 TO CONVERGENCE 7009 1360-3 3011 7008 3013 CL 96532100_096.eps 121199 Figure 8-1 The Clock (SCL) and Data (SDA) lines to the Interface and Convergence panels is switched Off in the standby mode.
  • Page 73 MG5.1E 8. Interface panel 8.2 INTERFACE POWER CONNECTION INTERFACE POWER CONNECTION FROM POWER SMALL BOARD SIGNAL PANEL 50_60HZ 1302-1 1341-1 1302-3 +5V STBY 1328-6 +7V7 5007 TO SSP 1302-4 -7V7 1328-8 -7V7 2051 100uF 1302-7 +5V2 6000 5000 6001 +7V7...

  • Page 74: Side Jack Panel

    9. SIDE JACK Panel MG5.1E SIDE JACK Panel Figure 9-1 The Side Jack panel accepts composite or SVHS video from PAL, SECAM, or NTSC. (Figure 9-1) The signal is amplified by Personal notes transistors 7000 and 7001 and filtered by 2007. This circuit is used to signal the Small Signal panel that signal is present on the Side Jack panel.

  • Page 75: Audio Signal Part

    MG5.1E 10. Audio signal part Audio signal part CL 96532100_099.eps 191199 Figure 10-1...
  • Page 76 10. Audio signal part MG5.1E Right and Left Channel Audio from the circuits on the Small Signal panel is routed through the Interface panel and fed to the Personal notes Audio Amplifier panel. (Figure 10-1) Right and Left channel audio is fe to Pins 15 and 16 of IC 7301 the Audio output IC.
  • Page 77 MG5.1E 10. Audio signal part 3012 1375-2 TO CONVERGENCE 7007 1360-1 3011 7006 3010 3015 1375-4 TO CONVERGENCE 7009 1360-3 3011 7008 3013 CL 96532100_096.eps 121199 Figure 10-2 The output of the Audio Amplifier is then fed to the Rear Speaker Switch.
  • Page 78 10. Audio signal part MG5.1E CL 96532100_101.eps 121199 Figure 10-3...
  • Page 79 MG5.1E 10. Audio signal part LEFT RIGHT RIGHT AUDIO AMPLIFIER REAR SPEAKER RIGHT SWITCH PANEL MUTE LEFT LEFT 1000 1403 TO POWER FROM EXTERNAL SUPPLY PANEL CENTER CHANNEL CL 96532100_098 191199 Figure 10-4 To troubleshoot the power supply, first check the input signal on connector 1401, Pins 3 and 5 (Figure 10-4).

  • Page 80: Digital Convergence Circuit

    11. Digital convergence circuit MG5.1E Digital convergence circuit TO INTERFACE PANEL 1034 1035 +15V HORIZ RET -35V HORIZ -35V VERT RET VERT TO CONVERGENCE PANEL TO POWER SUPPLY +35V HORIZ RET PANEL +35V HORIZ -15V VERT RET -15 RTN VERT...
  • Page 81 MG5.1E 11. Digital convergence circuit IC300 +5VA C300 C301 100n R334 IC301 C302 C303 100n F304 L304 IC303 1676-1 +12V +12V +15V C315 C314 C306 C307 1000uF 1000uF 100n F303 L303 IC302 1676-3 -12V -12V -15V C305 C312 C313 C304...
  • Page 82 11. Digital convergence circuit MG5.1E CL 96532100_104.eps 151199 Figure 11-3...
  • Page 83 MG5.1E 11. Digital convergence circuit 3107 150R 1364-2 1377-2 3108 150R 3102 3101 2042 3093 3007 1364-4 220n 6002 330R BLUE 1377-4 CONV_BL 7012 3092 3019 3094 330R TO SMALL SIGNAL PANEL FROM CONVERGENCE PANEL 6018 3104 3103 2041 3096...

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