Philips TF1.1E-AA Service Manual

Colour Television Chassis

TF1.1E

AA

E_15310_000.eps

301104

Contents Page

1. Technical Specifications, Connections, and Chassis Overview 2

2. Safety Instructions, Warnings, and Notes 4

3. Directions for Use 5

4. Mechanical Instructions 9

5. Service Modes, Error Codes, and Fault Finding 12

6. Block Diagrams, Test Point Overviews, and

Waveforms

Wiring Diagram 15 Block Diagram Video, Audio, and Control 16 I2C Diagram 17

7. Circuit Diagrams and PWB Layouts Diagram PWB Main Panel: Micro Controller (A1) 18 24 Main Panel: Video Decoder (A2) 19 24 Main Panel: Tuner (A3) 20 24 Main Panel: Video Processor (A4) 21 24 Main Panel: Sound Decoder + Amplifier (A5) 22 24 Main Panel: Power Supply (A6) 23 24 Main Panel: SCART (A7) 23 24 LCD TV AV Front (D) 25 25 Keyboard (E) 26 26

8. Alignments 27

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets 28 Abbreviation list 29 IC Data Sheets 31

10. Spare Parts List 35

11. Revision List 37

©

Copyright 2005 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 JH 05612 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 15131

EN 2 TF1.1E AA1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Connection Overview

1.3 Chassis Overview

Note: Figures below can deviate slightly from the actual situation, due to the different set executions.

1.1 Technical Specifications

1.1.1 Vision

Display type : LCD Screen size : 14” (37 cm), 4:3 Resolution (HxV pixels) : 640x480 Contrast ratio : 450:1 Light output (cd/m Response time (ms) : 16 Viewing angle (HxV degrees) : 140x120 Tuning system : PLL TV Colour systems : PAL B/G, D/K, I

Video playback : NTSC M/N 3.58, 4.43

Supported formats : VGA (640x480) Channel selections : 100 presets

1.1.2 Sound

Sound systems : FM-stereo B/G

Maximum power (W

1.1.3 Miscellaneous

2

) : 450

: SECAM B/G, D/K, L/L’

: PAL B/G : SECAM L/L’

:VHF : UHF : S-band : Hyper-band

: NICAM B/G, D/K, I, L

):2 x 2

RMS

1.2 Connection Overview

Note: The following connector colour abbreviations are used

(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy= Grey, Rd= Red, Wh= White, and Ye= Yellow.

1.2.1 Side Connections

SIDE I/O

S-Video (optional)

Video

L Audio R

E_14480_111.eps

060504

Figure 1-1 Side I/O

1.2.2 Rear Connections

EXT1 AV OUT

AUDIOLAUDIO

VIDEO

Figure 1-2 Rear I/O

Aerial - In

- - IEC-type (EU) Coax, 75 ohm D

DC IN

R

E_15310_002.eps

211004

Power supply:

- Mains voltage (V

- Mains frequency (Hz) : 50 / 60

) : 100 - 240

AC

Ambient conditions:

- Temperature range (°C) : +5 to +40

- Maximum humidity : 90% R.H.

Power consumption

- Normal operation (W) : ≈ 40

- Stand-by (W) : < 2

Dimensions (WxHxD in cm) : 34x32x6.3

Weight (kg) : 4.8

Cinch: Video CVBS - Out, Audio - Out

Ye - Video CVBS 1 V Wh - Audio L 0.5 V Rd - Audio R 0.5 V

/ 75 ohm kq

PP

/10 kohm kq

RMS

/ 10 kohm kq

RMS

Power: DC - In

1 - 12 V j

External 1: Video RGB/YUV - In, CVBS - In/Out, Audio - In/ Out

21

20

E_06532_001.eps

2

1

050404

Figure 1-3 SCART connector

1 - Audio R 0.5 V 2 - Audio R 0.5 V 3 - Audio L 0.5 V 4 - Ground Audio Gnd H

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm k

RMS

5 - Ground Blue Gnd H 6 - Audio L 0.5 V 7 - Video Blue/U 0.7 V

/ 10 kohm j

RMS

/ 75 ohm j

PP

Technical Specifications, Connections, and Chassis Overview

EN 3TF1.1E AA 1.

8 - Function Select 0 - 2 V: INT

4.5 - 7 V: EXT 16:9

9.5 - 12 V: EXT 4:3 j

9 - Ground Gn Gnd H 10 - n.c. 11 - Video Grn/Y 0.7 or 1 V 12 - n.c.

/ 75 ohm j

PP

13 - Ground Red Gnd H 14 - n.c. H

1.3 Chassis Overview

MAIN PANEL

15 - Video Red/V 0.7 V 16 - RGB Ctrl 0 - 0.4 V: INT

/ 75 ohm j

PP

1 - 3 V: EXT / 75 ohm j 17 - Ground Video Gnd H 18 - Ground RGB Ctrl Gnd H 19 - Video CVBS 1 V 20 - Video CVBS 1 V 21 - Shield Gnd H

/ 75 ohm k

PP

/ 75 ohm j

PP

LCD

REMOTE AND KEYBOARD PANEL

INVERTER PANEL

SIDE A/V PANEL

E_15310_001.eps

241104

Figure 1-4 Chassis Overview

EN 4 TF1.1E AA2.

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

Index of this chapter:

2.1 Safety Instructions

2.2 Warnings

2.3 Notes

2.1 Safety Instructions

Safety regulations require that during a repair:

• Connect the set to the Mains (AC Power) via an isolation transformer (> 800 VA).

• Replace safety components, indicated by the symbol h, only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.

Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points:

• Route the wire trees correctly and fix them with the mounted cable clamps.

• Check the insulation of the mains lead for external damage.

• Check the cabinet for defects, to avoid touching of any inner parts by the customer.

2.2 Warnings

• All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD w). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential. Available ESD protection equipment: – Complete kit ESD3 (small tablemat, wristband,

connection box, extension cable and earth cable) 4822 310 10671.

– Wristband tester 4822 344 13999.

• Be careful during measurements in the high voltage section.

• Never replace modules or other components while the unit is switched "on".

• When you align the set, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable.

2.3.2 Schematic Notes

• All resistor values are in ohms and the value multiplier is often used to indicate the decimal point location (e.g. 2K2 indicates 2.2 kohm).

• Resistor values with no multiplier may be indicated with either an "E" or an "R" (e.g. 220E or 220R indicates 220 ohm).

• All capacitor values are given in micro-farads (µ= x10 nano-farads (n= x10

• Capacitor values may also use the value multiplier as the decimal point indication (e.g. 2p2 indicates 2.2 pF).

• An "asterisk" (*) indicates component usage varies. Refer to the diversity tables for the correct values.

• The correct component values are listed in the Electrical Replacement Parts List. Therefore, always check this list when there is any doubt.

2.3.3 Practical Service Precautions

• It makes sense to avoid exposure to electrical shock. While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

• Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

-9

), or pico-farads (p= x10

-12

-6

),

).

2.3 Notes

2.3.1 General

• Measure the voltages and waveforms with regard to the

chassis (= tuner) ground (H), or hot ground (I), depending on the tested area of circuitry. The voltages and waveforms shown in the diagrams are indicative. Measure them in the Service Default Mode (see chapter 5) with a colour bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or

61.25 MHz for NTSC (channel 3).

• Where necessary, measure the waveforms and voltages

with (D) and without (E) aerial signal. Measure the voltages in the power supply section both in normal operation (G) and in stand-by (F). These values are indicated by means of the appropriate symbols.

• The semiconductors indicated in the circuit diagram and in the parts lists, are interchangeable per position with the semiconductors in the unit, irrespective of the type indication on these semiconductors.

3. Directions for Use

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4. Mechanical Instructions

Mechanical Instructions

EN 9TF1.1E AA 4.

Index of this chapter:

4.1 Service Positions

4.2 Assy/Panel Removal

4.3 Set Re-assembly

Notes:

• Figures below can deviate slightly from the actual situation, due to the different set executions.

• Follow the disassemble instructions in described order.

4.1 Service Positions

For easy servicing of this set, there are a few possibilities created:

• The buffers from the packaging.

• Foam bars (created for service).

4.1.1 Foam Bars

E_06532_018.eps

Figure 4-1 Foam bars

The foam bars (order code 3122 785 90580 for two pieces) can be used for all types and sizes of Flat TVs. By laying the TV face down on the (ESD protective) foam bars, a stable situation is created to perform measurements and alignments. By placing a mirror under the TV, you can monitor the screen.

4.2 Assy/Panel Removal

Before removing the cover, turn off LCD TV and plug off the adapter socket.

170504

1. Remove the connector cover.

2. Remove the 4 screws at the corner (A) and the two in the middle (B) that secure the rear cover.

3

Figure 4-3 inside Rear cover

3. Lift the rear cover at the bottom. Be aware of the clamps at the left and right side and at the top (2x)of the cover. Make sure that wires are not damaged during cover removal.

4. Remove the two side AV connectors from the side connector panel and the headphone connector from the main panel.

4.2.2 Main Panel

C

D

B

E_15130_004.eps

211004

A

4.2.1 Rear Cover

A

B

Figure 4-2 Rear cover

B

E_15130_003.eps

211004

E_15130_015.eps

051104

Figure 4-4 Main panel

1. Remove connector (A) to remote and keyboard panel.

2. Remove connector (B) to invertor panel.

3. Remove both the speaker connectors (C).

4. Remove connector to LCD panel (D). Caution: Be careful, because this connection is very fragile!

5. Remove the 4 screws from the main panel.

6. Take out the panel.

EN 10 TF1.1E AA4.

Mechanical Instructions

4.2.3 Invertor Panel

2

Figure 4-5 Invertor panel

1. Remove the 4 conncectors to LCD panel.

2. Remove the 2 fixation screws that hold the shield and Invertor panel.

3. Take out the shield.

4. Take out the panel.

4.2.4 LCD Panel

E_15130_006.eps

221004

4.2.5 Remote and Keyboard Panel

1

Figure 4-7 Remote and Keyboard panel

1. Remove the fixation screws.

2. Take out the panel.

3. Be aware of the buttons, they are not fixed in the frame.

4.2.6 Side Connector Panel

E_15130_008.eps

221004

Important: Be sure to work in a dust free environment during the following activities. In addition, the use of (fabric) hand gloves is advised.

E_15130_007.eps

211004

Figure 4-6 LCD panel disassembly

1. Place the TV set face down on the foam bars. Place the bars at the edges of the set, so they will support the front frame and not only the glass plate!

2. Remove all the parker screws around the frame.

3. Lift the LCD panel including the metal cover from the plastic frame.

4. Remove the screws (4) that hold the LCD panel.

5. Remove the LCD panel from the metal cover. Be careful, don’t damage the cables and be aware of the cable positions.

2

E_15130_009.eps

Figure 4-8 Side connector panel

1. Disconnect all cables from the panel.

2. Remove the fixation screws and take out the panel.

221004

4.3 Set Re-assembly

To re-assemble the whole set, execute all processes in reverse order.

Notes:

• While re-assembling, make sure that all cables are placed and connected in their original position. See figure "Cable dressing".

Mechanical Instructions

EN 11TF1.1E AA 4.

Figure 4-9 Cable dressing

E_15130_010.eps

221004

EN 12 TF1.1E AA5.

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

Index of this chapter:

5.1 Test Points

5.2 Service Mode

5.3 Problems and Solving Tips

5.4 Fault Finding and Repair Tips

5.1 Test Points

This chassis is equipped with test points in the service printing. In the schematics test points are identified with TPxx. These test points are specifically mentioned in the service manual as “half moons” with a dot in the centre. Perform measurements under the following conditions:

• Television set in Service Mode.

• Video input: Colour bar signal.

• Audio input: 3 kHz left channel, 1 kHz right channel.

5.2 Service Mode

Service mode offers several features for the service technician.

5.2.1 Service Menu

Purpose

• To change option settings.

• To enable / disable hotel mode.

• To perform alignments.

Specifications

• Software version and Option settings display.

• Option settings.

• Software alignments (Geometry and Audio).

• Hotel mode.

• Automatic Gain Control.

How to enter

Press the following key sequence on the remote control transmitter: “062596" directly followed by the OSD/STATUS/ INFO button (do not allow the OSD display to time out between entries while keying the sequence).

After entering Service Menu, the following screen is visible.

LCD14 pv1.4

Program P01 OPT. GEO. Hotel Mode OFF Volume AGC 0031

E_15130_011.eps

221004

Menu explanation

1. AAAAA BB X.XX. This is the software identification of the Main microprocessor: – A= the chassis name (LCD14). – B= software identification: pv= Philips Version – X= the Main software version number (updated with a

major change that is incompatible with previous versions).

2. Program. Indication of the current program (00..99).

3. Option Bytes (OPT). Shows all option settings. See “Options” in the Alignments section for a detailed description. Three codes are available.

4. Geometry (GEO). See Alignments section for a detailed description.

5. Hotel mode. Used to set the TV in hotel mode.

6. Automatic Gain Control (AGC). Used to adjust the AGC (00..31). Fixed value =16.

How to navigate

• In the Service Menu, select menu items with the CURSOR UP/DOWN keys on the remote control transmitter. The selected item will be highlighted.

• With the CURSOR LEFT/RIGHT keys, it is possible to: – Activate the selected menu item. – Change the value of the selected menu item. – Activate the selected submenu.

• When you press the MENU key in while in a submenu, you will return to the previous menu.

How to exit

When you press the MENU key in while in a the main service menu, you will return to the normal user mode.

5.2.2 Hotel Mode

Purpose

Installation is omitted in Hotel Mode. You cannot search any channel when the Hotel Mode is activated. Volume level cannot be increased higher then a previous defined level.

Specification

• Hotel Mode is activated by toggling the mode to on in the Service Menu with the CURSOR LEFT/RIGHT keys.

• The maximum volume level is set with the CURSOR LEFT/ RIGHT keys.

5.3 Problems and Solving Tips

5.3.1 Picture Problems

Note: The problems described below are all related to the TV

settings. The procedures used to change the value (or status) of the different settings are described.

Figure 5-1 Service Menu

Picture too dark or too bright

1. Press the MENU button on the remote control transmitter. This brings up the normal user menu.

2. In the normal user menu, use the CURSOR UP/DOWN keys (if necessary) to highlight the PICTURE sub menu.

3. Press the CURSOR LEFT/RIGHT keys to enter the PICTURE sub menu.

4. Use the CURSOR UP/DOWN keys (if necessary) to select BRIGHTNESS.

5. Press the CURSOR LEFT/RIGHT keys to increase or decrease the BRIGHTNESS value.

6. Use the CURSOR UP/DOWN keys to select CONTRAST.

7. Press the CURSOR LEFT/RIGHT keys to increase or decrease the CONTRAST value.

8. Use the CURSOR UP/DOWN keys to select STORE.