Philips 32PT740H37A Service Manual

Technical Specifications, Connections and Chassis Overview Technical Specifications Reception Feature Data Tuning system : PLL Color systems (of

Video: HD Jack Interface (Diagram N) The Jack High Definition module covers the following functions: 1. RGB output selection. 2. Matrix circuit to c

RGB Output Selection The module has two video inputs and one RGB output (going into the set.) The inputs can also handle 1080i-signals and 480p-signal

Sync Slicer The sync slicer extracts the horizontal and vertical synchronization signals for the HOP (in the set): • From the 3-level sync pulses Y

Sync Selection If the synchronization is derived from Y or Green, the H and V sync from the sync-slicer must be selected. • When YPbPr-signal or RGB

Video: High-end Input Processor (HIP, diagram B2) In the N8 the TDA932xH input processor is used, which contains the following functions: • IF demodu

Video Processing The sandcastle-pulse of the HIP will not be used for synchronization. The HOP will generate synchronization signal derived from the f

ADC/DAC Analogue to Digital conversion is done with three identical 9-bit ADC's. Digital to Analogue conversion uses three identical 10-bit DACs.

CTI At CVBS video signals, the bandwidth of color signals is limited to 1/4 of the luminance bandwidth. Transients between areas of different color ar

PROZONIC Figure: 100 Hz conversion To the PICNIC, external ICs are connected dependent of the features. For N8-sets with Digital Scan the PROZONIC

• Line flicker reduction (Digital Scan): this is a feature to reduce the 30 Hz interlace line flicker. • Dynamic Noise Reduction: noise affected sig

Miscellaneous Feature Data Set stroke numbers : /17 AC voltage : 120V (± 10%), AC frequency : 50 / 60Hz (± 5%) Ambient temperature : + 5 t

Video Control After conversion to RGB again, the signals can be controlled for Saturation, Contrast, and Brightness. 2nd RGB Interface for OSD/CC On

In this chassis, a 'one-point' cut-off control is used: A current of 8A (for cut-off) is fed to pin 44 of the HOP. This is done with a measu

East/West Drive. At pin 3, the E/W-drive is available. Pin 4 is a feedback input for the EHT-info and is used to prevent pumping of the picture. EHT

3D Comb Filter (Diagram CO) Conventional Comb filters separate the luminance (black and white picture information) from the chroma (color picture info

Figure: Block diagram 3D Comb panel Synchronization (Diagram B3 and B4) The HIP video processor provides vertical and horizontal sync pulses VA and H

The 'framedrive +' line drives the frame deflection. When no CVBS is offered to the video processor, the VA and HA pulses are switched &apo

The HOP (located on the SSB) generates the line-drive pulses (LINEDRIVE1), which have a frequency of 31468 Hz (T = 31.77s). When the LINEDRIVE1 signa

Operation of the Line Output Stage To explain the operation of the line output stage, we use the following start conditions: • C2433 is charged to ma

through L5422 continues to flow through C2426 and C2421. The energy stored in the line deflection coil is passed to C2425, and the energy of L5422 to

The Linearity Correction A constant voltage across the horizontal deflection coil should result in a linear increasing saw-tooth current. This however

S-Video Connector Kind Value Symbol 1 Gnd v 2 Gnd v 3 Y 1Vpp / 75 ohm j 4 C 0.3Vpp / 75 ohm j Audio / video Connector Kind Val

The E/W-Correction A line, written at the upper- or lower side of the screen, will be larger at the screen center when a fixed deflection current is u

The DYN-FASE-CORR signal is fed to the HOP via C2455 and drives a dynamic phase correction necessary because of beam current variations. This is done

• EW-corner, • EW-trapezium, • Horizontal parallelogram, • Horizontal bow. Beam Current Correction The EHT-info at point 10 of the LOT is depende

The HOP drives the frame output stage. As the HOP is 'cold' and the frame output stage is 'hot', they must be galvanic isolated. T

The sawtooth voltage for the frame output stage is not generated by the HOP but by a discrete circuit after the optocoupler 7610 via R3600 and R3601 a

Protection Circuit for Bridge-Coil and Frame Output Stage The secondary voltage of bridge coil L5422 is guarded at the diode modulator (D6421/22) via

All MSP versions contain digital audio processing used for the basic left/right stereo sound, such as bass, treble, balance, incredible sound and spat

Explanation BTSC Stereo System (USA) The standard for TV stereo audio in the USA was set by the Broadcast Television Systems Committee (BTSC). The BTS

The figure also shows the Second Audio Program (SAP) frequency, which is a constant carrier of an audio tone of 5fH (78,670 Hz), FM modulated by the S

Audio Processing The sound processing in N8 is completely done by the MSP3451G for 'Virtual Dolby' sets: • Volume control is done by the us

Rear Connections Figure: Rear connections Monitor out Connector Kind Value Symbol 1 Video 1Vpp / 75 ohm kq 2 Audio L (0.5Vrms / 10k) kq 3

Audio Amplification The audio amplifier part is very straightforward. It uses two integrated power amplifiers (TDA2616). It delivers an output of 2 x

At the end of the slope, the SCAVEM-current decays to zero, and the spot is at the original position. An overshoot occurs which improves the impressio

Key Components: • Tuner (1900): UV1336BL9/AGS • SAW Filter (1901): OFWM1962M • IF processor (7914): TDA9801 • PIP processor (7803): M65669 • Swit

Block Diagram: There are basically two types of configurations. 2-antenna inputs or one tuner PIP, as shown in Fig. 1. Figure: PIP panel block diagra

Circuit Descriptions IF section (for set with 2-antenna inputs) Basically the IF-processing works around IC7901 TDA9801 and tuner. It demodulates the

In order to display the external AV sources by the PIP panel, source selection circuit is incorporated on the panel. In A10 PIP execution, 3 external

DACs. The YUV are output at pin-39, 37 & 35 of IC7803 respectively. In order to display the PIP sub-picture correctly on the main picture, the VFB

Table: Semi-standby switching logic Condition Semi Stdby pin 12 IC7910 Stand By pin 13 on main uP Remarks Normal High High PIP ON, TV ON,Main Front

Abbreviation List Abbreviation Description 1fh 1 time the line frequency 2fh 2 times the line frequency 480p 480 lines resolution (progressive scan

AUDIO-R Audio Right AUDIO-SL Audio Surround Left AUDIO-SW Audio Subwoofer Auto TV Name for the combination of picture features/improvements, which

AV1 in Connector Kind Value Symbol 4 Video 1Vpp / 75 ohm jq 5 Audio L (0.5Vrms / 10k) jq 6 Audio R (0.5Vrms / 10k) jq AV2 in Connector

CRT Cathode Ray Tube or picture tube CSM Customer Service Mode CTI Color Transient Improvement: manipulates steepness of chroma transients CVBS Com

DSP Digital Signal Processing DVD Digital Versatile Disc DW Double Window DYN-FASE-COR Dynamic phase correction EHT Extra High Tension EHT-INFO E

G-SC1-IN Green EXT1 in G-SC2-IN Green EXT2 in H-770-2 Horizontal 2 level sync pulse (HD-sources) H-770-3 Horizontal 3 level sync pulse (HD-sources)

IN-FRONT-SNDL Sound left front in IN-FRONT-SNDR Sound right front in IN-SC1-B In EXT1 Blue IN-SC1-G In EXT1 Green IN-SC1-R In EXT1 Red IN-SC1-SND

MUTE Mute-Line NC Not Connected NDF No vertical Deflection: vertical fly back protection NHF No Horizontal deflection: horizontal fly back protecti

frame at the same time, creating a double vertical resolution. PTC Positive Temperature Coefficient Resistor (degaussing) PTP Picture Tube Panel RA

SLDP Smart Local Dooming Prevention (HW and SW) SMC Surface Mounted Components SNDL-SC1-IN Sound left EXT1 in SNDL-SC1-OUT Sound left EXT1 out S

YPbPr YUV-input with other naming YUV YUV-input C Micro controller V-100 V from Feature Box V-770 Vertical synchronization (HD-sources) VA Vertic

EM1.1U AA(7644)P01 P02 P03 P04P05 P06, P07 P13 P15P16 L02 L03 L04L05 L06 L07 L08L09+13V_Lot L10 - 15V_Lot L11 F01

EM1.1U AA(7644)F02 F03 F04 F05F06 F07 F08IN+ F09F10 A01 A02 A03A04 A14 A15 I2 SCLI3 SDA P17 V2 CVBS_INT V06

AV4 in (D-sub connector) Connector Kind Value Symbol 1 Pr/R 0.35 Vpp/0.7 Vpp / ohm jq 2 Y/G 0.7 Vpp/0.7 Vpp / 75 ohm jq 3 Pb/B 0.35 Vpp/0.

EM1.1U AA(7644)V07 V08 V9 SDA V10 SCLF14 L08 I6 VIF - out S03S04 S5 Y-IN S06 H-A S07 V-AS08 V13 V-IN V14 V15V16 V17 SCL F17 F18

EM1.1U AA(7644)F19 F20 L12 L13V19 V20 V21 V22 SCLV23 SDA V28 V29 V30C3 C4 HSYNC C5 VSYNC C6C11 C01 C02 C03

EM1.1U AA(7644)C04

All Models (7644) - Chassis Overview

All Models (7644) - Main Supply [A1]

All Models (7644) - Stand-by Supply [A2]

All Models (7644) - Line Deflection [A3]

All Models (7644) - Frame Deflection/Rotation [A4]

All Models (7644) - Audio Amplifier [A5]

All Models (7644) - Headphone Amplifier [A6]

Mechanical Instructions Rear Cover Removal 1. Remove all the rear cover retaining screws. 2. Now pull the rear cover backward and remove it. Servic

All Models (7644) - Tuner, I/O, SIMM Connector [A7]

All Models (7644) - Front [A8]

All Models (7644) - Sim Connector (Male) [B1]

All Models (7644) - IF, I/O Video Processing [B2]

All Models (7644) - Feature Box [B3]

All Models (7644) - HOP [B4]

All Models (7644) - Audio Demodulator [B6]

All Models (7644) - Painter [B7]

All Models (7644) - 3D Comb [CO]

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - PIP 2ND Front-end [C1]

1. To remove the LSP assembly from the bottom tray, release the 2 locks in the middle on each side rail by moving the tab backward and at the same ti

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - PIP Colour [C2]

All Models (7644) - Side I/O Panel [D]

USED ONLY IN MODELS: 27PT830H37C, 32PT830H37A (7644) - Top Control Panel PV0 Styling [E]

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Top Control Panel PV2 Styling [E]

All Models (7644) - CRT PANEL [F]

NOT USED IN MODELS: , 32PT740H37A (7644) - DC Shift Panel [G]

NOT USED IN MODELS: , 32PT740H37A (7644) - VDAF Panel + 2nd Orders [I]

NOT USED IN MODELS: , 32PT740H37A (7644) - Front Interface Panel (For PV0 & PV2 Styling) [J]

USED ONLY IN MODELS: 32PT740H37A (7644) - Front Interface Panel (For SL3 Styling) [J]

NOT USED IN MODELS: , 32PT842H37A, 36PT842H37D (7644) - Control (For no PIP) [N1]

10. The LSP is now serviceable (all functions should work, except for degaussing and picture rotation). Figure:

NOT USED IN MODELS: , 32PT842H37A, 36PT842H37D (7644) - Inputs / Outputs (For no PIP) [N2]

NOT USED IN MODELS: , 32PT842H37A, 36PT842H37D (7644) - Sync Slicer (For no PIP) [N3]

NOT USED IN MODELS: , 32PT842H37A, 36PT842H37D (7644) - Matrix (For no PIP) [N4]

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Control (For PIP) [N1]

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Inputs / Outputs (For PIP) [N2]

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Sync Slicer (For PIP) [N3]

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Matrix (For PIP) [N4]

All Models (7644) - YPbPr [Q]

All Models (7644) - Layout LSP (Top Side)

All Models (7644) - Layout LSP (Bottom Side)

Small Signal Board (SSB) Service Position All relevant test points are accessible with the SSB in its original position, but for ease of use an '

All Models (7644) - Layout SSB (LOT Side)

All Models (7644) - Layout SSB (Tuner Side)

All Models (7644) - Layout 3D Comb (Top View)

All Models (7644) - Layout 3D Comb (Bottom View)

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Layout PIP Panel (Top Side)

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Layout PIP Panel (Bottom Side)

All Models (7644) - Layout Side I/O Panel (Top Side)

All Models (7644) - Layout Side I/O Panel (Bottom Side)

USED ONLY IN MODELS: 27PT830H37C, 32PT830H37A (7644) - Layout Top Control Panel PV0 Styling (Top Side)

USED ONLY IN MODELS: 27PT830H37C, 32PT830H37A (7644) - Layout Top Control Panel PV0 Styling (Bottom Side)

IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Philips Consumer Electronics Company** Equipment

3. Remove/lift the 'LSP top bracket' after removing the 2 screws that hold the bracket at the right side. 4. Remove the shielding of the S

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Layout Top Control Panel PV2 Styling (Top Side)

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Layout Top Control Panel PV2 Styling (Bottom Side)

All Models (7644) - Layout CRT Panel (Top Side)

All Models (7644) - Layout CRT Panel (Bottom Side)

NOT USED IN MODELS: , 32PT740H37A (7644) - Layout DC Shift Panel

NOT USED IN MODELS: , 32PT740H37A (7644) - Layout VDAF + 2ND Order Panel (Top Side)

NOT USED IN MODELS: , 32PT740H37A (7644) - Layout VDAF + 2ND Order Panel (Bottom Side)

NOT USED IN MODELS: , 32PT740H37A (7644) - Layout Front Interface Panel (For PV0 & PV2 Styling) (Top Side)

USED ONLY IN MODELS: 32PT740H37A (7644) - Layout Front Interface Panel (For SL3 Styling) (Top Side)

NOT USED IN MODELS: , 32PT842H37A, 36PT842H37D (7644) - Layout Jack High Definition Interface Panel (For no PIP) (Top Side)

Double Window (DW) Panel Removal Figure: 1. Remove the 'DW panel/3D comb filter panel' bracket from the bottom tray by pulling the relea

NOT USED IN MODELS: , 32PT842H37A, 36PT842H37D (7644) - Layout Jack High Definition Interface Panel (For no PIP) (Bottom Side)

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Layout Jack High Definition Interface Panel (For PIP) (Top Side)

USED ONLY IN MODELS: 32PT842H37A, 36PT842H37D (7644) - Layout Jack High Definition Interface Panel (For PIP) (Bottom Side)

All Models (7644) - Layout YPbPr (Top Side)

All Models (7644) - Layout YPbPr (Bottom Side)

All Models (7644) - Testpoint Overview LSP

All Models (7644) - Testpoint Overview SSB

All Models (7644) - Testpoint Overview CRT Panel

27PT830H37C - Manual no. 7644 Large Signal Panel Large Signal Panel

Dynamic Astigmatic Focus (DAF) Panel Removal Figure: 1. Release a release catch [1] (on the LSP bracket between the LSP and DAF panel) by pushing

27PT830H37C (continued) 2926 Cap, 470u, 20%, 6.3v, Electrolytic . . 3198 025 04710 2927

27PT830H37C (continued) 3705 Res, 1K2, 5%, 1/10W, Metalized Glass . 3198 021 51220 3706

27PT830H37C (continued) 6422 Diode, Rect, BY229X-600 . . . . . . . 9340 380 20127 6436

27PT830H37C (continued) 9904 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9906

27PT830H37C (continued) 2554 Cap, 470p, 10%, 50v, Ceramic . . . . . 3198 017 34710 2555

27PT830H37C (continued) 3318 Res, 1K, 5%, 1/16W, Metalized Glass. . 3198 021 31020 3319

27PT830H37C (continued) 3791 Resistor Network, 4 X 100 ohm, 5%. . . 3198 031 11010 3792

27PT830H37C (continued) 7323 IC, TDA9321H/N2. . . . . . . . . . . . 9352 625 24518 7324

27PT830H37C (continued) 5008 Coil, 22u. . . . . . . . . . . . . . . 3198 018 72290 5009

27PT830H37C (continued) CBA Mains/Front Interface Panel. . . . . . 3139 178 65661 0214

Top Control Panel Removal Figure: 1. Remove the two screws which hold the panel. 2. Pull the top control panel backward (release it from its front

27PT830H37C (continued) 7108 Transistor, NPN, PMBT2369(UAW) . . . . 3198 010 43360 7109

27PT830H37C (continued) 3310 Res, 1K, 5%, 1/10W, Metalized Glass. . 3198 021 51020 3311

32PT740H37A - Manual no. 7644 Large Signal Panel Large Signal Panel

32PT740H37A (continued) 2942 Cap, 6n8, 10%, 50v, Ceramic. . . . . . 3198 017 06820 2951

32PT740H37A (continued) 3706 Res, 1K2, 5%, 1/10W, Metalized Glass . 3198 021 51220 3710

32PT740H37A (continued) 6421 Diode, Rect, BY359X-1500. . . . . . . 9340 303 30127 6422

32PT740H37A (continued) 9724 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9726

32PT740H37A (continued) 2511 Cap, 10u, 20%, 16v, Electrolytic . . . 3198 030 41090 2512

32PT740H37A (continued) 3313 Res, 1K, 5%, 1/16W, Metalized Glass. . 3198 021 31020 3314

32PT740H37A (continued) 3754 Res, 10 ohm, 5%, 1/16W, Metalized Glass 3198 021 31090 3755

Mains Switch Panel Removal Figure: The easiest way to access this module is with the LSP in service position 2. 1. Position the cabinet a bit over

32PT740H37A (continued) 7314 Transistor, NPN, BC847BW(COL). . . . . 3198 010 42310 7315

32PT740H37A (continued) 5003 Filter, 14.3MHz. . . . . . . . . . . . 2422 549 44784 5004

32PT740H37A (continued) 3140 Res, 4K7, 5%, 1/10W, Metalized Glass . 3198 021 54720 3141

32PT740H37A (continued) 9403 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9404

32PT740H37A (continued) 9326 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9330

32PT830H37A - Manual no. 7644 Large Signal Panel Large Signal Panel

32PT830H37A (continued) 2923 Cap, 330p, 5%, 50v, Ceramic. . . . . . 3198 016 03310 2925

32PT830H37A (continued) 3652 Res, 100 ohm, 5%, 1/10W, Metalized Glas 3198 021 51010 3653

32PT830H37A (continued) 6204 Zener Diode, 6.8 volt. . . . . . . . . 3198 020 56880 6205

32PT830H37A (continued) 9707 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9712

Service Modes, Error Codes and Faultfinding Contents of this chapter: 1. Test points. 2. Service Modes. 3. Problems and solving tips (related to CS

32PT830H37A (continued) 2501 Cap, 47p, 5%, 50v, Ceramic . . . . . . 3198 016 34790 2502

32PT830H37A (continued) 3302 Res, 1K8, 5%, 1/16W, Metalized Glass . 3198 021 31820S 3304

32PT830H37A (continued) 3739 Res, 100 ohm, 5%, 1/16W, Metalized Glas 3198 021 31010 3740

32PT830H37A (continued) 7304 Transistor, NPN, PDTC144EU . . . . . . 3198 010 44330 7305

32PT830H37A (continued) 3099 Res, 470 ohm, 5%, 1/16W, Metalized Glas 3198 021 34710 3100

32PT830H37A (continued) 5801 Transformer, Self Correction . . . . . 3128 138 38881 5810

32PT830H37A (continued) 6905 Zener Diode, 6.8 volt. . . . . . . . . 3198 020 56880 6906

32PT830H37A (continued) 3120 Res, 180 ohm, 1%, 1/16W, Metalized Glas 2322 704 61801 3121

32PT842H37A - Manual no. 7644 Large Signal Panel Large Signal Panel

32PT842H37A (continued) 2920 Cap, 100p, 5%, 50v, Ceramic. . . . . . 3198 016 01010 2921

• SC1-SC2, etc., for the SCAVEM circuitry on the CRT panel [F] • V1-V2-V3, etc., for the video processing circuitry [B2, B3, B4, B5, B6] and Double

32PT842H37A (continued) 3644 Res, 10K, 5%, 1/10W, Metalized Glass . 3198 021 51030 3645

32PT842H37A (continued) 6124 Diode, BAT85 . . . . . . . . . . . . . 9336 247 60133 6200

32PT842H37A (continued) 9622 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9623

32PT842H37A (continued) 2413 Cap, 47u, 20%, 16v, Electrolytic . . . 3198 030 44790 2418

32PT842H37A (continued) S 3070 Res, 1R5, 5%, 1/8W, Metalized Glass. . 2322 750 61508S 3071

32PT842H37A (continued) 3718 Res, 220 ohm, 5%, 1/16W, Metalized Glas 3198 021 32210 3725

32PT842H37A (continued) 7001 IC, SAA5677/HL/M1. . . . . . . . . . . 9352 692 99557 7002

32PT842H37A (continued) 3073 Res, 330 ohm, 5%, 1/16W, Metalized Glas 3198 021 33310 3074

32PT842H37A (continued) 3820 Res, 3K3, 5%, 1/10W, Metalized Glass . 3198 021 53320 3821

32PT842H37A (continued) 3944 Trim Pot, 47K. . . . . . . . . . . . . 2120 363 90166 3945

Service Default Mode (SDM) Purpose • Provide a situation with predefined settings in order to retrieve the same measurement results as published in t

32PT842H37A (continued) 2409 Cap, 470n, +80/-20%, 10v, Ceramic. . . 3198 017 44740 2410

36PT842H37D - Manual no. 7644 Large Signal Panel Large Signal Panel

36PT842H37D (continued) 2920 Cap, 100p, 5%, 50v, Ceramic. . . . . . 3198 016 01010 2921

36PT842H37D (continued) 3654 Res, 1K, 5%, 1/10W, Metalized Glass. . 3198 021 51020 3654

36PT842H37D (continued) 6205 Zener Diode, 6.8 volt. . . . . . . . . 3198 020 56880 6206

36PT842H37D (continued) 9707 Wire Jumper. . . . . . . . . . . . . . 3198 036 90010 9712

36PT842H37D (continued) 2429 Cap, 100n, 10%, 16v, Ceramic . . . . . 3198 017 31040 2501

36PT842H37D (continued) S 3300 Res, 3R9, 5%, 1/8W, Metalized Glass. . 2322 750 63908 3301

36PT842H37D (continued) 3732 Res, 1K, 5%, 1/16W, Metalized Glass. . 3198 021 31020 3733

36PT842H37D (continued) 7005 IC, LD1117D33. . . . . . . . . . . . . 9322 116 74668 7006

How to enter Use one of the following methods: • Via a standard RC transmitter: key in the code '062596' directly followed by the 'MEN

36PT842H37D (continued) 3082 Res, 47 ohm, 5%, 1/16W, Metalized Glass 3198 021 34790 3083

36PT842H37D (continued) 3824 Res, 4K7, 5%, 1/10W, Metalized Glass . 3198 021 54720 3826

36PT842H37D (continued) 3950 Res, 22K, 5%, 1/10W, Metalized Glass . 3198 021 52230 3951

36PT842H37D (continued) 2412 Cap, 330p, 5%, 50v, Ceramic. . . . . . 3198 016 33310 2420

How to navigate When you press the 'MENU' button on the RC transmitter, the set toggles between the SDM and the normal user menus (with the

FIRE AND SHOCK HAZARD 1. Be sure all components are positioned in such a way as to avoid the possibility of adjacent component shorts. This is especia

How to enter Use one of the following methods: • Via a standard RC transmitter by entering the code '062596' followed by the 'STATUS/E

Figure: SAM Menu

Explanation The Service Alignment Mode menu will now appear on the screen. The following information is displayed: 1. Operation hours timer (hexadec

Pressing the 'MENU/SELECT' button on the RC transmitter switches between the SAM and the normal user menus (with the SAM mode still active i

Figure: CSM Menu Line 1: HRS : Hexadecimal counter of operating hours. Example: 1B (hex)= 0001 1011 (bin)= 27 (dec.). Standby hours are not counted

Line 5: Indicates that the set is not receiving an 'ident' signal on the selected source. Note: On some models, BLUE MUTE is displayed (if t

How to exit The Customer Service Mode will switch off after pressing any (except channel + or channel - key) key of the RC transmitter (with the excep

White line around picture elements and text • Press the 'Smart Picture' button on the RC transmitter. If the picture improves, decrease the

Menu text not sharp enough • Press the 'Smart Picture' button on the RC transmitter. If the picture improves, decrease the contrast value.

Specifications ComPair consists of a Windows based faultfinding program and an interface box between PC and the (defective) product. The ComPair inter

LEAKAGE CURRENT COLD CHECK 1. Unplug the ac line cord and connect a jumper between the two prongs of the plug. 2. Turn on the power switch. 3. Meas

By a combination of automatic diagnostics and an interactive question/answer procedure, ComPair will enable you to find most problems in a fast and ef

7. Plug the AC power adapter in the AC power outlet and switch on the interface. The green and red LEDs light up together. The red LED extinguishes a

Error Buffer Introduction The error code buffer contains all detected errors since the last time the buffer was erased. The buffer is written from lef

Error Codes In case of non-intermittent faults, clear the error buffer before starting the repair. This is to ensure that 'old' error codes

Error Device Description Def. item Diagram 13 TEDE9 Main Tuner 1200 A7 14 MSP3415D MSP34xx 7651 B6 15 NA NA NA NA 16 TELE9 PIP Tuner

Error 2 The HOP (pos. 7301 on diagram B4 detects the absence of an HFB pulse (pin 4 of connector 0324 on LSP, diagram A3)). A bit will be set in the

Error 5 See startup flow chart (figure 5.7). When POR bit is not communicated during startup, the processor will generate 'HOP POR not successfu

Error 10 Non Volatile Memory (EEPROM - pos. 7012) does not respond to the microcontroller. Error 11 During the last startup, the NVM and the microc

Error 31 SAA4978 PICNIC error (pos. 7709 on the SSB). Error 32 TDA 9330 HOP video control/geometry error (pos. 7301 on the SSB). Error 35 I/O exp

Example of error buffer: 12 9 6 0 0 After entering SDM: § 1 long blink of 750ms followed by a pause of 1.5s, § 2 short blinks followed by a pause o

To get a quick diagnosis the EM1.1U has 3 service modes implemented: • The Customer Service Mode (CSM). • The Service Default Mode (SDM). Startup of

There are several types of protections: • I 2 C related protections (e.g., +5V supply check). • HOP related protections (mainly for deflection items

• Flash detection. From the EHT info, via D6303 and T7303, a flash will stop the H-drive and line output stage immediately. The FLS bit in the status

General and Repair Tips General Figure: Start-up circuitry The startup of the set is very different from other sets (see figure 5-7 and 5-8): 1. Wh

2. Now the HOP is driving the line circuitry with 50kHz pulses. At the base of the line transistor this is sensed via the 'STANDBY' line. 3

Figure: Start-up diagram

Notice that a very big part of the set (Large Signal Panel) is 'hot,' meaning the primary part of the Standby supply, the whole Main supply

5. Use a variac to slowly increase the AC power. Measure over sensing resistors R3514/15, to confirm a nice sawtooth voltage becomes available. Also

Vertical Deflection Caution: When you suspect the Vertical Deflection circuitry, please be careful. Because there is a DC voltage on the vertical defl

Figure: Repair Tips

TV SAFETY NOTES SAFETY CHECKS After the original service problem has been corrected, a complete safety check should be made. Be sure to check over th

Alignments Contents of this chapter: • General Alignment Conditions • Hardware Alignments • Software Alignments and Settings Note: The Service Defa

Hardware Alignments Figure: Large Signal panel (LSP) Vg2 Adjustment Method 1 (without oscilloscope) 1. Connect a video pattern generator to the set

Method 2 (with oscilloscope) 1. Connect the RF output (channel 3) of the pattern generator to the antenna input of the TV. Test pattern is a “black p

Focus 1. Tune the set to a circle or crosshatch test pattern (use an external video pattern generator). 2. Adjust the first Focus potmeter (upper LO

PIP AFC adjustment Set the pattern generator (e.g., PM5418) to a color bar video signal and connect the RF output to aerial input. Set amplitude to at

Figure: Geometry alignments

Alignments 1. Connect an external video pattern generator to the aerial input of the TV set with a crosshatch test pattern. 2. Use default settings

• East West Trapezium (EW. TRAP) Align straight vertical lines in the middle of the screen. • East West Upper Corner (EW. UCORN) [*] Align straight

Set the pattern generator (e.g., PM5418) to a white spot (chessboard) pattern and connect RF output with aerial input. Set amplitude to 1mV and use de

Peak-White Alignment You can adjust the light output of the CRT in the WHITE TONE sub menu. In this case, a color analyzer is necessary. 1. Set the

5. When troubleshooting and making test measurements in a receiver with a problem of excessive high voltage, reduce the line voltage by means of a Var

Table: IF PLL offset AFA AFB IF PLL offset 0 0 Decrease offset value 0 1 Increase offset value 1 0 Correct 1 1 Correct AGC Set the pattern

1. Enter SAM mode, select TUNER and activate the 2ND AGC line in the sub menu. 2. Connect a DC multimeter to pin 1 of the tuner (7201 on DW panel).

Changes in the option byte settings are saved by leaving the OPTION submenu. Some changes will only take effect after the set has been switched off by

Table: Option overview for type number 842 Byte Bit Abbr. Feature Description (OFF = 0, ON = 1) OB1 1 IPIX Incredible Picture OFF = function disab

OB2 2 PIPT PiP Tuner OFF = function disabled / ON= function enabled OB2 3 PIPC PiP Control (hue control) OFF = function disabled / ON= function enab

OB3 6 CCAP Close Caption OFF = function disabled / ON= function enabled OB3 7 SURF Surf OFF = function disabled / ON= function enabled OB3 8 VSLC Ver

OB5 1 --- --- N/A OB5 2 --- --- N/A OB5 3 --- --- N/A OB5 4 --- --- N/A OB5 5 LTI Luminance Transient Improvement OFF = function disable

Byte Bit Abbr. Feature Description (OFF = 0, ON = 1) OB1 4 SMCK Smart clock OFF = AUTOCHRON is not available / ON = available OB1 5 E149 Picture

Byte Bit Abbr. Feature Description (OFF = 0, ON = 1) OB2 7 VDBY Virtual DolBY OFF = Virtual Dolby not available / ON = Virtual Dolby is available

Byte Bit Abbr. Feature Description (OFF = 0, ON = 1) OB4 2 AKBL AKB Line OFF = function disabled / ON= function enabled OB4 3 VSR Vertical Scan R

PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) Some semiconductor solid state devices can be damaged easily by static electricity. Such components commo

Circuit Descriptions and Abbreviation List Index of this chapter: 1. Introduction. 2. Block diagram. 3. Power Supply. 4. Control and Teletext. 5.

The user interface and micro controller are the same as used in the H8 set. In the N8 however, a HIP, PICNIC, and HOP are used for the '100 Hz&ap

Note: The start-up behavior of the N8 is different than that of the MG-chassis, meaning that the 'Supply ON/Deflection OFF' situation does n

The tuner type is a PLL tuner and delivers the IF-signal, via audio and video SAW-filters, to the HIP (High-end Input Processor). The HIP has the foll

signals from CC/OSD are also inserted via the HOP. The video part delivers the RGB signals to the CRT-panel and the geometry part delivers the H-drive

The difference between this and former MG-sets is that VBAT is not mains isolated ('hot') and is alignment free. Power Supply (Diagram A1 a

C2507 prevents the high-frequency signals, generated by the set, to be conveyed into the mains by short-circuiting them. In the case of a lightning

Standby Power Supply (Diagram A2) This power supply is of a SOPS type (Self-Oscillating Power Supply) and is regulated by the controlled switching of

Figure: Standby supply circuitry To apply this on the N8 (diagram A2): replace switch 'S' by FET TS7102, coil L by L5101, diode D by D6111

The maximum current is determined by the time the FET stays into conductance (t0 - t1). This time is directly determined by the voltage across R3108//

PRACTICAL SERVICE PRECAUTIONS IT MAKES SENSE TO AVOID EXPOSURE TO ELECTRICAL SHOCK. While some sources are expected to have a possible dangerous impa

Transistor TS7100 will be driven and a negative voltage will be transposed to the emitter of TS7101. When TS7101 conducts, the gate of the FET is at e

Main Supply (Diagram A1) Some important notes on beforehand: • VBAT is not isolated from the main supply ('hot'). • VBAT is alignment f

• After closing switch 'S', the linear in time increasing current IT, , will charge capacitor C. • Opening switch 'S' will gene

At start-up of the main supply, C2515 can be assumed as being a short-circuit. UAB will be 15 V (R3513, D6510) and UGS of the FET will be +5.4 V (volt

Via a voltage divider, existing of (1 %) resistors R3507, R3510 and R3527, a voltage of 2.5 V (when VBAT = 141 V) is fed to the input of precision shu

If, for any reason, the stabilization circuit fails, the output voltage VBAT can never exceed 200 V (via D6514). D6514 will form a short-circuit, VBAT

Guarding circuit: The 11V of the line-stage is monitored. The +28V winding (pin 6) of supply-transformer 5506 is monitored. (These pulses, when switc

Control and Closed Captioning (diagram B7) Painter The SAA5677/M1 (IC7001) is called the Painter (OSD, CC and Control). In this IC, the microprocessor

Closed Captioning The painter deals with CC-decoding. The Painter gets its video signal directly on pin 31 (from the HIP). The RGB-outputs are availa

Tuner and IF (Diagram A7 and B2) The tuner is I2C-controlled and is capable of receiving off-air and cable channels: The tuning is done via I2C. The r