Table of Contents
Advertisement
Quick Links
Colour Television
ServiceManual
Content
2. Connection facilities, chassis overview
warnings and Notes
5. Service modes, DST, error messages,
protections, faultfinding and repair tips including:
Errorcodes-table
Protection-structure (overview and detailed)
6. Block diagrams
Block diagram
(Supply, Deflection, CRT)
Block diagram
(Video, Audio, Control)
Survey of testpoints
Oscillograms
Wiring diagram
2
Overview I
C -ICs
Supply lines overview
Published by CO 9871 TV Service Department
Printed in The Netherlands
without the prior permision of Philips.
Copyright reserved 1998 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
5
Subject to modification
©
Copyright reserved 1998 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, electron-
ic, mechanical, photocopying, or otherwise without the prior permision of Philips.
Published by CO 9871 TV Service Department
2
3
5
7
9
15
17
22
29
29
30
31
32
33
33
34
4822 727 21622
Printed in The Netherlands
7. Electrical Diagrams and PWB lay-outs
Power Supply
Frame Deflection / Frame Rotation (Diagram A3) 39
Audio Amplifier
Mains switch Panel
CRT / Scavem Panel
Tuner, IF, I/O, Video processing
Input / Output
Sound processing
Audio Dolby
Secam Correction
Featurebox 6 (Eco)
Video control & Geometry
Teletext & Control
Side I/O Panel
Top Control Panel
DC Shift
Diversity tables
9. Circuit Descriptions: not available (see Training
Manual)
Subject to modification
1
Chassis
MG2.1E
AA
mg21frtp.eps
290798
Diagram PWB
(Diagram A1)
35
36,37
38
36,37
36,37
(Diagram A4)
40
36,37
(Diagram E)
41
41
(Diagram F)
42
43
(Diagram K1)
46
44,45
(Diagram K2)
47
44,45
(Diagram K3)
48
44,45
(Diagram K4)
49
44,45
(Diagram U)
49
49
(Diagram K5)
50
44,45
(Diagram K6)
51
44,45
(Diagram K7)
52
44,45
(Diagram O)
53
53
(Diagram P)
54
54
(Diagram G)
54
54
55
57
63
64
75
77
5 4822 727 21622
Advertisement
Table of Contents
Related Manuals for Philips 28PW8505/58
Summary of Contents for Philips 28PW8505/58
-
Page 1: Table Of Contents
Copyright reserved 1998 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... -
Page 2: Technical Specifications
Technical specifications MG2.1E Mains voltage : 220V - 240V (± 10%); Technical specifications 50-60Hz (± 5%) : coaxial 75 Ω Aerial input impedance Minimal aerial voltage : 30µV (VHF), 40µV (UHF) Maximum aerial voltage : 180 mV Programmes : 0-99 VCR programmes : 0, 90-99... - Page 3 Specification connections MG2.1E Front connections 5 - Blue Specification connections L (0.5Vrms ≥10kΩ) 6 - Audio 7 - Blue (0.7Vpp/75Ω) 8 - CVBS- TOP CONTROL FL7/FL8 status 0-1.3V:INT STYLING 4.5-7V:EXT 16:9 AUDIO R 9.5-12V:EXT 4:3 AUDIO L AUTO TV 'IR- VIDEO 9 - Green SENSOR...
- Page 4 Specification connections MG2.1E 2.2.3 External 3 (in): CVBS+Audio (optional) 4.5-7V:EXT 16:9 9.5-12V:EXT 4:3 2 - Audio R (0.5Vrms >10kΩ) 4 - Audio 17- CVBS 6 - Audio L (0.5Vrms>10kΩ) 18- CVBS 8 - CVBS- 20- CVBS (1Vpp/75Ω) status 0-1.3V:INT 21- Earth socket CRT/SCAVEM PANEL TOP CONTROL PANEL...
-
Page 5: Safety Instructions, Maintenance
Safety instructions, Maintenance instruction, MG2.1E Safety instructions for repairs – When the set is used under normal circumstances, for Safety instructions, Maintenance instruction, Warnings and Notes 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. - Page 6 Safety instructions, Maintenance instruction, MG2.1E Notes 1. The direct voltages and oscillograms should be measured with regard to the tuner earth , or hot earth as this is called (see fig. 3.3) 2. The direct voltages and oscillograms shown in the diagrams are indicative and should be measured in the Service Default Mode (see chapter 8) with a colour bar signal and stereo sound (L:3 kHz, R:1 kHz unless stated...
- Page 7 Mechanical instructions MG2.1E Removing the rear cover Mechanical instructions Side I/O assembly SSP - bracket LSP - topbracket LSP - bracket Bottom tray CL 86532042_002.AI 240798 Figure 4-3 CL 86532042_001.AI 160798 Figure 4-1 1. Remove 1 screw in case of a 2-scart I/O coverplate and 2 screws in case of a 3-scart I/O coverplate (see figure 4.2).
-
Page 8: Mechanical Instructions
Mechanical instructions MG2.1E 2. Press the board upwards and remove the board from the bracket. Removing the top control board Top control board CL 86532042_006.ai CL 86532042_004.AI 240798 160798 Figure 4-5 Figure 4-6 1. Referring to previous Service position one must remove 1. -
Page 9: Fault Find Tree
Service modes, error codes and protections MG2.1E In this chapter the following paragraphs are included: – Tuning frequency 475.25 MHz. Service modes, error codes and protections 5.1 Test points – TV-system for BGLM sets set to BG, for BGLL'I sets to LL'. 5.2 Service modes and Dealer Service Tool and ComPair –... - Page 10 Service modes, error codes and protections MG2.1E "cursor-up" and "cursor-down" keys), or the buttons on the TV control handset after pressing the red button for picture menu or by switching off the TV set with the mains switch. and selecting "contrast". Line 7: LS Colour;...
- Page 11 Service modes, error codes and protections MG2.1E sound menu, selecting "Surround settings" and selecting "Rear selected. Once the micro-search has been successful the volume". This feature is only available when surround mode is Tuned Bit will be set to "No". in "Dolby Pro Logic"...
- Page 12 Service modes, error codes and protections MG2.1E Fading picture Colours not correct/unstable picture. Check lines 17 "Colour System" and 18 "TV System". In case line 17 is 'SECAM' and Digital scan effect. Check line 14 "DNR". The status of "DNR" line 18 is 'BG', the installed system for this preset is 'USA', while is 'med' or 'max'.
- Page 13 ComPair can take over the Compair initialisation of the television. In this way it is possible to ComPair (Computer Aided Repair) is a service tool for Philips distinguish which part of the start-up routine (hence which Consumer Electronics products. ComPair is a further circuitry) is causing the problem.
- Page 14 Service modes, error codes and protections MG2.1E automatically pop-up the schematic with the location of C2568 Stepwise Startup /Shutdown feature of set can be used via marked. Compair Stepwise startup explanation Via ComPair the stepwise startup (see also chapter 4) can be realised.
-
Page 15: Line Deflection (Diagram A2)
Service modes, error codes and protections MG2.1E how long it exists in the error buffer. When for any reason a buffer content, reset the buffer, and look again which error false raised error exists in the buffer, it will be deleted after 50 codes are generated by the set. - Page 16 Service modes, error codes and protections MG2.1E alike the usual Standby, however the micro-processor has to • VFB: Vertical Flyback (See detailed figure 5.9). The HOP remain in normal operation completely. will blank the screen , if the vertical flyback signals are not present at the VFB-guard input .The relevant status bit will The protections of the MG2.1E can be divided in 4 groups ;...
- Page 17 St-by Protectionstructure MG2.1E ST24E16 ST24E32 OTC (3) Mainswitch (65) slow St-by 1050 Mains St-by 5Vst-by I/O video (10) 6570 7021 I/O audio (11) +5Vst-by green Tuner (67) Picnic (50) Prozonic (51) 6051 7000/ 7050 (77) + (16V) 7001 6571 (20) 6052 140V tuner...
- Page 18 Service modes, error codes and protections MG2.1E 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 1102 (Tuner) 7402 (LTP) (21)
- Page 19 Service modes, error codes and protections MG2.1E 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 86532092_013.eps 031198 Figure 5-8...
- Page 20 Service modes, error codes and protections MG2.1E 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 SM 86532047_039.eps 290798 Figure 5-9...
- Page 21 Service modes, error codes and protections MG2.1E SM 86532047_040.eps 290798 Figure 5-10...
- Page 22 Service modes, error codes and protections MG2.1E Figure 5-11...
- Page 23 Service modes, error codes and protections MG2.1E Figure 5-12...
- Page 24 Service modes, error codes and protections MG2.1E Figure 5-13...
- Page 25 Service modes, error codes and protections MG2.1E Figure 5-14...
- Page 26 Service modes, error codes and protections MG2.1E Figure 5-15...
- Page 27 Service modes, error codes and protections MG2.1E Figure 5-16...
- Page 28 Service modes, error codes and protections MG2.1E Figure 5-17...
- Page 29 Electrical alignments MG2.1E General alignment conditions 6, blue pin 11) and measure for each cathode the DC level Electrical alignments of the measuring pulse (see elucidation above and Fig. 8.2) and write down each value. Remark: Trigger the scope All electrical alignments should be made under the following external via a CVBS signal (for instance via pin 19 of the conditions: scart1 connection).
-
Page 30: Electrical Alignments
Electrical alignments MG2.1E can be aligned. Alignment is correct when DC-voltage is just below 3.8 V Alignments and settings in the Service Alignment Menu 8.5.1 General Entering the SAM can be done in 2 ways: • Briefly shorting the service pins 'SERVICE ALIGNMENT MODE' on the front side of the SSP (pins 1 and 2 of CL 86532057_006.AI 170798... - Page 31 Electrical alignments MG2.1E 'Option number': 29" – All options together, expressed in two long numbers. The 32" original factory setting for these numbers can be found on the picture tube sticker on the inside of the set. 'Luminance delays' With the 'Luminance delays' alignment the luminance 'Store': information is placed on the chrominance information (brightness is pushed onto the colour).
- Page 32 Electrical alignments MG2.1E 1. Align 'V slope' (when aligning the below half of the picture Alignment Mode'. All software related options that are is blanked). The middle line of the test pattern must be incorporated under the heading 'Dealer Options' of the 'Service matched with the edge of this blanking/picture transient in Alignment Mode'', can also be reached directly via the '>button the middle of the picture.
- Page 33 Electrical alignments MG2.1E Options in the Service Alignment Mode Menu-item Subjects Options Physically in the set Teletext Teletext present Teletext not present Communication Easylink Easylink set Easylink not set Picture tube CRT Type 4:3 picture tube 16:9 16:9 picture tube Picture Rotation (only for 16:9) rame rotation circuitry present on LSP (IC7440 diagram A3) Frame rotation circuitry not present (IC7440 diagram A3)
- Page 34 Electrical alignments MG2.1E Split Screen Demo mode; lower part is digital scan + natural motion / upper part is only digital scan Personal Blue Mute Blue mute active in case no picture detected Noise in case of no picture detected Virgin Mode TV starts up once with language selection menu after mains switch on for the first time (virgin mode)
- Page 35 Circuit description MG2.1E For the circuit description see the provisional Training Manual Circuit description MG2.1E (4822 727 21619).
- Page 36 Preparation Your remote control & Place the TV on a solid surface. For ventilation, leave at least 5 cm free all around the TV. To prevent any unsafe situations, do not place any objects on top of the TV. é Insert the aerial plug tightly into the aerial socket x at the back of the TV. Installation p.
- Page 37 Automatic installation Installation In the Automatic Installation menu select Start and press the OK key to activate the searching. All TV channels are searched for and stored automatically. Automatic Installation Select the ® Ò ‡ π † INSTALLATION MENU Start If a cable system which broadcasts ACI (Automatic Channel Installation) or a Stop Stop...
- Page 38 Give name Install TV Setup INSTALLATION INSTALLATION It is possible to change the name stored in the memory or to assign a name Menu Language Menu Language to a TV channel which has not yet been entered. A name with up to 5 letters Country &...
-
Page 39: Directions For Use
10 Directions for use MG2.1E... - Page 40 picture menu features menu sound menu Use of the menus features menu Features menu & Press the red, green or yellow colour key to display/cancel the PICTURE menu. SOUND FEATURES OK key to activate æ é Use the cursor in the up/down, left/right direction to select the menu item. &...
- Page 41 / Teletext Programme Guide Dual Screen Today, most broadcasters in Europe, are offering teletext pages containing ® Ò ‡ π † their programme schedule of today. These pages can be requested by switching & Press the key to switch on Dual Screen. the TV to Teletext Programme Guide.
- Page 42 Basic functions Use of the Teletext Programme Guide / menus The functions can be activated with the corresponding colour keys. If the function is not available, then the text is downlighted. & Press the æ key on the remote control to display/cancel the Teletext Programme Guide / menu.
- Page 43 Teletext Select the index teletext page colour keys • Press the white colour key to display the main index (usually p.100). to select Most TV channels broadcast information via teletext. Each channel which broadcasts teletext transmits a page with information on how to use its Only for T.O.P.
- Page 44 Connect Peripheral Equipment Special teletext functions There is a wide range of audio and video equipment that can be connected Hold to your TV. The following connection diagrams show you how to connect it. ® Ò ‡ π † • Press S to stop the page counter from seeking when you have entered a wrong page number or when the page is not available.
- Page 45 Camera and camcorder To select connected equipment • Connect your camera or camcorder at the right side of your TV. • 2 and 3 for mono equipment. Connect the equipment to VIDEO AUDIO L If the TV is connected to a video recorder with the EasyLink function, in some cases Press the X key repeatedly to select the sound coming from one or both •...
- Page 46 Record with your video recorder without EasyLink To record S-VHS quality, connect a S-VHS peripheral directly to the video recorder. Satellite receiver Press the key on the left side of the remote control. 1. Record a TV programme MODE Press the OK key simultaneously with the digit key 1. •...
-
Page 47: List Of Abbreviations
11 List of Abbreviations MG2.1E 16:9-ARFRONT 16:9 aspect ratio input from side I/O IN-SC2-CVBS_Y In scart2 CVBS or luminance (SVHS) List of Abbreviations Automatic Gain Control IN-SC2-FBL In scart2 fast blanking AM-SOUND Amplitude modulated sound signal IN-SC2-G In scart2 green AUDIO-C Audio centre IO-BUS... - Page 48 11 List of Abbreviations MG2.1E SNDS-VR-OUT Surround sound right variable level out SOUND L- HEADPHONE-OUT Sound left headphone out SOUND R- HEADPHONE-OUT Sound right headphone out SOUND-ENABLE Sound enable Small Signal Panel STANDBY Standby STATUS1/2/3 Status signal from Euro-connector 1 or 2 or 3 to the µP, signal (1.29-3.31V is 16:9 signal, 3.32-5.0V is 4:3 signal) STBY...
-
Page 49: Spare Parts List
12 Spare parts list MG2.1E Large Signal Panel [A1] Spare parts list 2450∆ 4822 121 40518 100nF 10% 250V 3056∆ 4822 116 10065 1M A/495V MAX 3530∆ 4822 052 10108 1Ω 5% 0,33W 2454 4822 126 13296 100nF 10% 16V 850V 3531 4822 116 52207 1k2 5% 0,5W... - Page 50 12 Spare parts list MG2.1E 5422 4822 157 71829 Bridge coil 7102 4822 130 11417 STP3NB60FP 3327 4822 051 20104 100k 5% 0,1W 7324 5322 130 60508 BC857B 5423 4822 157 71097 0.56µH 7103 4822 130 40959 BC547B 3329 4822 116 83864 10k 5% 0,5W 7330 4822 209 91143 TDA6101Q/N3 5425...
- Page 51 12 Spare parts list MG2.1E 2008 4822 126 14305 100nF 10% 16V 2502 4822 126 14305 100nF 10% 16V 2763 5322 122 32268 470pF 10% 50V 3112∆ 4822 051 20472 4k7 5% 0.1W 2009 4822 126 14305 100nF 10% 16V 2503 4822 126 14305 100nF 10% 16V 2764...
- Page 52 12 Spare parts list MG2.1E 3409 4822 051 20681 680Ω 5% 0.1W 3785 4822 051 30682 6k8 5% 0.062W 6214 4822 130 11413 PDZ10B 3420 4822 051 30473 47k 5% 0.062W 3786 4822 051 30223 22k 5% 0.062W 6215 4822 130 11413 PDZ10B Side I/O panel [O] 3422 4822 117 11449 2k2 1% 0.1W...