Specifications
Table Of Contents
- Contents
- 1. Technical Specifications, Connections, and Chassis Overview
- 2. Safety Instructions, Warnings, and Notes
- 3. Directions for Use
- 4. Mechanical Instructions
- 4.1 Disassembly Procedures
- Figure 4-1 Exploded view 51” cabinet
- 4.1.1 Lower Center Back Cover Removal (86)
- 4.1.2 Side Back Cover Removal
- 4.1.3 Large Signal Board Removal (LSB)
- 4.1.4 AC Input Panel Removal
- 4.1.5 Small Signal Module Removal (SSM)
- 4.1.6 Side Jack Panel Removal
- 4.1.7 PIP Panel Removal (if present)
- 4.1.8 Small Signal Board Removal (SSB)
- 4.1.9 Convergence Panel Removal (ACS)
- 4.1.10 Wide Band Video Panel Removal (HOP)
- 4.1.11 Front Control Panel and Left or Right Speaker Removal (5)
- 4.1.12 Upper Back Cover Removal (4)
- 4.1.13 Plastic Light Barrier Removal (Optical Assembly)
- 4.1.14 Mirror Mounting Board Removal (57)
- 4.1.15 Complete Optical Assembly or Individual CRT Assembly Removal
- 4.2 Service Position
- 4.3 Picture Tube Replacement
- 4.4 Set Re-assembly
- 4.1 Disassembly Procedures
- 5. Service Modes, Error Codes, and Fault Finding
- 5.1 Test Conditions
- 5.2 Service Modes
- 5.3 Problems and Solving Tips (related to CSM)
- 5.4 ComPair
- 5.5 Error Codes
- 5.6 The ”Blinking LED” Procedure
- 5.7 Trouble Shooting Tips
- 6. Block Diagrams, Testpoint Overviews, and Waveforms
- 7. Circuit Diagrams and PWB Layouts
- Power Supply Panel: AC Input
- Layout Power Supply Panel (Top Side)
- Layout Power Supply Panel (Bottom Side)
- SSB: SIM Connector (Male)
- SSB: IF, I/O Videoprocessing
- SSB: Feature Box (100Hz Processing)
- SSB: HOP
- SSB: Audio Demodulator
- SSB: Painter
- Layout SSB (Top Side)
- Mapping Layout SSB (Top Side)
- Mapping Layout SSB (Bottom Side)
- Layout SSB (Bottom Side)
- SSM: Tuner
- SSM: I/O’s
- SSM: Video Buffer
- SSM: Convergence HV Output 1
- SSM: Convergence HV Output 2
- SSM: Interconnections
- SSM: Audio Amplifier
- SSM: Headphone Amplifier
- Mapping SSM C1-C8 Part 1
- Mapping SSM C1-C8 Part 2
- Mapping SSM C1-C8 Part 3
- Layout SSM (Top Side)
- Layout SSM (Bottom Side)
- CRT Panel: Red
- CRT Panel: Green
- CRT Panel: Blue
- Mapping CRT Panel: Red, Green, and Blue
- Layout CRT Panel (Top Side)
- Layout CRT Panel (Bottom Side)
- Large Signal Panel
- Large Signal Panel
- Large Signal Panel
- LSP: Diversity Tables
- Layout Large Signal Panel (Top Side)
- Layout Large Signal Panel (Bottom Side)
- Side Jack Panel
- Mapping Side Jack Panel G1
- Layout Side Jack Panel (Top Side)
- Layout Side Jack Panel (Bottom Side)
- ACS Module
- ACS Module
- ACS Module
- Mapping ACS Module H1-H3
- Layout ACS Panel (Top Side)
- Layout ACS Panel (Bottom Side)
- HOP Panel
- HOP Panel
- Diversity HOP Panel J1 and J2
- Mapping HOP Panel Part 1
- Mapping HOP Panel Part 2
- Layout HOP Panel (Top Side)
- Layout HOP Panel (Bottom Side)
- Keyboard Panel
- Mapping Keyboard Panel
- Layout Keyboard Panel (Top and BottomSide)
- UART Interface Module
- Layout UART Interface Modukle
- 8. Alignments
- 8.1 General Alignment Conditions
- 8.2 Hardware alignments
- 8.3 Software Alignments
- 8.4 Convergence and Geometry Adjustments
- 8.5 Option Settings
- 9. Circuit Descriptions, List of Abbreviations, and IC Data Sheets
- 9.1 Introduction
- 9.2 Power Supplies
- 9.3 Video
- Figure 9-7 Video signal block diagram
- 9.3.1 Side Jack Panel
- 9.3.2 SSM composite Inputs
- 9.3.3 SSM Video Switching
- 9.3.4 SSB Video Switching
- 9.3.5 SAW Filter Switching
- 9.3.6 3D Comb Filter
- 9.3.7 Sound Trap Switching
- 9.3.8 1fH Component Buffer Amplifiers
- 9.3.9 Feature Box
- 9.3.10 Eagle
- 9.3.11 ATSC module
- 9.3.12 SSM HOP Buffer Amplifiers
- 9.3.13 HOP RGB/YUV Switching
- 9.3.14 HOP Signal Processing
- 9.3.15 HOP Sharpness Control
- 9.3.16 HOP Tint Control
- 9.3.17 HOP RGB Amplifiers
- 9.3.18 HOP Analogue Control
- 9.3.19 CRT Panel
- 9.3.20 HOP Sync Switching and Processing
- 9.3.21 Line Output
- 9.3.22 Frame Amplifier
- 9.3.23 High Voltage Circuit
- 9.3.24 Shutdown
- 9.3.25 Convergence
- 9.4 Audio
- 9.5 Control/OSD
- 9.6 List of Abbreviations
- 9.7 IC Data Sheets
- 10. Spare Parts List
- 11. Revision List
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 82 DPTV585 AA9.
9.2.2 AC Input Board
Figure 9-2 AC input board
The AC Input circuit is located on the AC Input panel. AC power
is connected to the AC Input panel via connector 1505. A 6.3
Amp Fuse, 1506 provides overcurrent protection. The Neutral
side of the AC line is connected to a series of Spark Gaps,
1529, 1530, and 1531 to the Tuner Ground to protect the set
from voltage surges. AC voltage is fed to Bridge rectifiers 6500
and 6402. Bridge 6500 provides the RAW B+ to the Main
Power supply located on the LSB. The Neutral side of the AC
line is also connected to the STARTUP for the Main supply.
This provides the Startup voltage for the Main supply.Bridge
6502 provides the Raw DC for the Standby supply.
9.2.3 Standby Power Supply
Figure 9-3 Standby power supply circuit
When power is applied to the set, Capacitor 2533 begins
charging via startup Resistor 3527. When the voltage on Pin 4
of 7510 reaches approximately 19 volts, the IC begins
switching Pin 1 of 7510. When Pin 1 goes Low, current flows
through the windings of 5501 via Pins 8 and 6. Energy is
coupled to the secondary windings. Operating voltage for the
Standby supply after startup is supplied by windings connected
to Pins 2 and 3. The +5STDBY is the reference supply for the
regulation circuit. The +5STDBY supply is fed to the input of
Shunt Regulator 7516 which drives Optoisolator 7511. If the 5-
volt supply
increases, 7511 will turn on harder, reducing the feedback
voltage on Pin 6 of 7510. If the 5 volt supply decreases, the
voltage on Pin 6 will increase, causing the internal switch of
7510 to stay on longer.
Over voltage protection is accomplished by monitoring the
voltage on Pin 5 of 7510. Voltage from Pin 2 of 5501 is rectified
by Diode 6511 and is fed to Pin 5 via diode 6514. If this voltage
goes above a certain level, 7510 will turn Off. If the DC voltage
feeding 7510 decreases, the Feedback voltage on Pin 6 will
increase. To prevent the IC from being overdriven, the voltage
on Pin 6 is limited to 5 volts. In normal operation, DC from the
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