Philips B8 Series Service Manual
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Philips B8 Series Service Manual

For color television
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Color Television
Service
Service
Service
Contents
5. Service Modes, Error Codes and Faultfinding
6. Block Diagrams and Testpoints
7. Electrical Diagrams and PWB's
B8 CHASSIS TABLE OF SCHEMATIC DIAGRAMS
MAIN CHASSIS (SECTION 1 OF 5)
MAIN CHASSIS (SECTION 2 OF 5)
MAIN CHASSIS (SECTION 3 OF 5)
MAIN CHASSIS (SECTION 4 OF 5)
MAIN CHASSIS (SECTION 5 OF 5 )
CRT PANEL (13", 19", & 20")
CRT PANEL (25" & 27")
KEYBOARD/SOUND SHAPER PANEL
STEREO PANEL SCHEMATIC
OCV TV PANEL SCHEMATIC
CARD INTERCONNECT PANEL
HEALTH CARE JACK PANEL
LODGING/SMART PORT PANEL
MAIN CHASSIS PCB (TOP)
MAIN CHASSIS PCB (BOTTOM)
13", 19", & 20" CRT PANEL PCB
25", & 27" CRT PANEL PCB
KEYBOARD/SOUND SHAPER PCB
STEREO PANEL PCB
OCV TV PANEL PCB (TOP)
OCV TV PANEL PCB (BOTTOM)
CARD INTERCONNECT PANEL PCB
HEALTH CARE JACK PANEL PCB
LODGING/SMART PORT PANEL PCB
8. Adjustments
10. Spare Parts List
©
Copyright 2001 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 means, electronic, mechanical,
photographic, or otherwise without the prior permission of Philips.
Published by Philips Consumer Electronics
B8 Series Chasssis
Subject to modification
Chassis
Manual 7562
2005 Aug 24
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Summary of Contents for Philips B8 Series

  • Page 1 10. Spare Parts List © Copyright 2001 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 means, electronic, mechanical, photographic, or otherwise without the prior permission of Philips.
  • Page 12 20B8(7562) 3 Vp-p 3.2 Vp-p 1 Vp-p 5.6 Vp-p 50 uSec 20 uSec 20 uSec 5 mSec 4.9 Vp-p 50 Vp-p 800 mVp-p 2.7 Vp-p 20 uSec 5 mSec 5 mSec 5 mSec 400 mVp-p 29 Vp-p 1.5 Vp-p 2.2 Vp-p 5 mSec 5 mSec 5 mSec...
  • Page 13 20B8(7562) 1.2 Vp-p 220 mVp-p 1.2 Vp-p 1.2 Vp-p 20 uSec 0.5 uSec 20 uSec 20 uSec 1.2 Vp-p 1.4 Vp-p 2.5 Vp-p 1 Vp-p 20 uSec 20 uSec 20 uSec 20 uSec 1.4 Vp-p 2.5 Vp-p 2.5 Vp-p 1.6 Vp-p 20 uSec 20 uSec 20 uSec...
  • Page 14 20B8(7562) 110 Vp-p 20 uSec...

  • Page 15: B8 Color Tv Chassis Overview

    B8 COLOR TV CHASSIS OVERVIEW The B8 Series Chassis is the Statement (standard line) TV Set produced by Philips Consumer Electronics Company for the 1997 model year. The B8 Chassis is used in TV Sets with 25, and 27 inch CRT's. The B8 Chassis is also used in Commercial TV Sets with 13, 19, 20, 25, and 27 inch CRT's.

  • Page 16: Signal Flow

    SIGNAL FLOW The incoming TV RF signal is applied to the U/V Tuner via the Antenna RF Input. The IF signal is developed within the U/V Tuner, then amplified by an IF Preamplifier located inside the Tuner. The amplified IF signal is sent from Pin 11 of the U/V Tuner to the SAW Filter, Y200. The SAW Filter produces bandpass shaping for the IF signal before it is applied to the TV Signal Processor Integrated Circuit, IC271, for processing.

  • Page 17: B8 Chassis Power Supply Block

    Horizontal/Vertical Processing block is applied internally within IC271. Brightness, Picture, Sharpness, Color, and Tint control voltages are applied to IC271 from Microcomputer, IC300 via the IIC Bus. The Red, Green, and Blue signals are developed within IC271 and output via Pins 21, 20, and 19. The Black Current Level Set is Output from Pin 18. The Red, Green, and Blue video signals from IC271 are applied to the CRT Board.
  • Page 18 the Bridge Rectifier circuit. The 160 volts dc goes through T425 to the transistor switch. The start up signal is taken from the neutral leg of the input ac line. The Power Supply consists of a single integrated circuit operating as a Free-Running Switching Mode Power Supply.
  • Page 19 All Models (7562) - MAIN CHASSIS (SECTION 1 OF 5)
  • Page 20 All Models (7562) - MAIN CHASSIS (SECTION 2 OF 5)
  • Page 21 All Models (7562) - MAIN CHASSIS (SECTION 3 OF 5)
  • Page 22 All Models (7562) - MAIN CHASSIS (SECTION 4 OF 5)
  • Page 23 All Models (7562) - MAIN CHASSIS (SECTION 5 OF 5 )
  • Page 24 All Models (7562) - CRT PANEL (13", 19", & 20")
  • Page 25 All Models (7562) - CRT PANEL (25" & 27")
  • Page 26 All Models (7562) - KEYBOARD/SOUND SHAPER PANEL...
  • Page 27 All Models (7562) - STEREO PANEL SCHEMATIC...
  • Page 28 All Models (7562) - OCV TV PANEL SCHEMATIC...
  • Page 29 All Models (7562) - CARD INTERCONNECT PANEL...
  • Page 30 All Models (7562) - HEALTH CARE JACK PANEL...
  • Page 31 All Models (7562) - LODGING/SMART PORT PANEL...
  • Page 32 All Models (7562) - MAIN CHASSIS PCB (TOP)
  • Page 33 All Models (7562) - MAIN CHASSIS PCB (BOTTOM)
  • Page 34 All Models (7562) - 13", 19", & 20" CRT PANEL PCB...
  • Page 35 All Models (7562) - 25", & 27" CRT PANEL PCB...
  • Page 36 All Models (7562) - KEYBOARD/SOUND SHAPER PCB...
  • Page 37 All Models (7562) - STEREO PANEL PCB...
  • Page 38 All Models (7562) - OCV TV PANEL PCB (TOP)
  • Page 39 All Models (7562) - OCV TV PANEL PCB (BOTTOM)
  • Page 40 All Models (7562) - CARD INTERCONNECT PANEL PCB...
  • Page 41 All Models (7562) - HEALTH CARE JACK PANEL PCB...
  • Page 42 All Models (7562) - LODGING/SMART PORT PANEL PCB...

  • Page 43: Adjustment And Test Point Layout

    Adjustment and Test Point Layout Service Adjustment Notes: Caution: The B8 Chassis incorporates a "Hot" ground system. Always use a separate isolation transformer when applying power to the exposed chassis. Unless Otherwise Specified: 1. All service adjustments are "Hot" voltagewise. For maximum safety, ensure the use of properly insulated tools.

  • Page 44: Adjusting The Picture

    Focus 1. Tune to a local station and adjust the Focus Control (located on the Flyback Transformer) for best picture details at high light conditions. Screen Control (G2) Setup (13", 19", & 20") 1. Apply an NTSC Color Bar test pattern, with the color "off", to the antenna input of the TV Receiver.

  • Page 45: Pre-Convergence Adjustments

    can be accomplished through the use of the Purity and Convergence Assembly located on the neck of the CRT. Degaussing the Receiver 1. Position the TV receiver so that the screen faces the same direction (North, South, East, or West) that it will be facing while in use. 2.

  • Page 46: Color Purity Adjustment

    Color Purity Adjustment 1. Connect a White Screen signal to the Antenna terminals. 2. Use Service Page G to set the Green control to maximum. Set the Blue control to minimum. 3. Enter Service Page A. 4. Note that the set is in bank ("00"). 5.

  • Page 47: Static Center Convergence

    Static Center Convergence Review Pre-Convergence Information 1. Connect a Center Cross pattern or a Crosshatch pattern to the Antenna input to ensure that the yoke is not tilted. Rotate the yoke, if necessary, to obtain a level raster. 2. Use Service Page G to set the Green control to minimum. 3.

  • Page 48: Service Mode

    When the correct position is located, place wedges 2 and 3 as seen in Figure B or E of 6. Now remove wedge 1 and place it as shown in Figure C or F. 7. Set the green control back to its mid-range position. 8.

  • Page 49: Service Mode Display

    To save the current modification of the register data, disconnect the set from its AC source. When the receiver is operating in the Service Mode, all normal on-screen displays are suppressed and replaced by a special display. Service Mode Display •...

  • Page 50: Spare Parts List

    Spare Parts List C381 0.01pF., 50V, 10%, Ceramic ..4835 122 87024 MAIN CHASSIS C383 1uF., 50V, 20%, Electrolytic ..4835 121 47406 CAPACITORS C384 470pF., 50V, 10%, Ceramic..4835 122 47614 C208 22uF., 50V, 20%, Electrolytic.
  • Page 51 Spare Parts List (continued) C530 10uF., 50V, 20%, Electrolytic..4835 124 47499 C741 1000pF., 10%, 50V, Carbon (Certain Mode C550 0.100uF., 63V, Electrolytic..4835 121 47602 ls only) ....4835 122 87023 C551 0.220uF., 63V, Electrolytic.
  • Page 52 Spare Parts List (continued) R305 10.0 ohm, 5%, 1/8W, Metal Film ..4835 111 37132 R387 470 ohm, 5%, 1/2W, Metal Film..4835 116 57723 R306 43k, 5%, 1/10W, Metal Film ..4835 111 37374 R390 100 ohm, 5%, 1/2W, Metal Film (Certain...
  • Page 53 Spare Parts List (continued) R539 820k, 5%, 1/2W, Metal Film ..4835 116 57743 R736 3.3k, 5%, 1/10W, Metal Film (Certain Mo R541 120k, 5%, 1/2W, Metal Film ..4835 116 57693 dels only) .
  • Page 54 Spare Parts List (continued) R797 10k, 5%, 1/10W, Metal Film (All 25" & 2 D508 Diode, Silicon BAS216..4835 130 37905 7" Models & Latam Models w/LCS & AVL). 4835 111 37216 D509 Diode, Silicon 1N4148.
  • Page 55 Spare Parts List (continued) BS15 Buss Wire (Certain Models only)..0322 179 00003 47pF., 5%, 50V, Ceramic..4835 122 47608 BS16 Buss Wire (Certain Models only)..0322 179 00003 1000pF., 10%, 500V, Ceramic.
  • Page 56 Spare Parts List (continued) S CRT21 10 Pin Board Connector ..2422 500 80037 2172 220uF., 25V, Electrolytic..4835 124 47557 2106 2.2uF., 50V, Electrolytic (ASD038 & 041 only).
  • Page 57 Spare Parts List (continued) 7103 IC, 3w Amp ....4835 209 88543 10k, 5%, 1/4W, Metal Film..4835 111 37023 7105 Bass Boost, Transistor (ASD038 &...
  • Page 58 Spare Parts List (continued) Peaking Coil ... . . 4835 157 67045 Z700 Zener Diode 8.2V ... 3198 010 28280 Peaking Coil .

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