Sony TVP-08 Installation guide

S®
Training Manual
Circuit Description and Troubleshooting
Course:TVP-08
Projection
Television

Course Description
and Troubleshooting:
RA-4Chassis
Prepared by: National Training Department
Sony Service Company
A Division of Sony Electronics Inc.
Course presented by______________________________________
Date___________________________________________________
Student Name ___________________________________________

Sony Service Company
ADivisionofSonyElectronicsInc©1998
AllRights Reserved
PrintedinU.S.A.
Sony and Trinitron are registered trademarks of Sony.

Features 1
Overview 1
Picture 1
Audio 1
Self-Diagnostics 3
Board Descriptions 5
Power Supply Block 7
AC Input 7
Power ON 7
Converter 7
Regulation 7
Protection 7
AC Input and Switching B+ 9
Overview 9
AC Input 9
B+ Rectifier 9
Standby Power Supply 11
Overview 11
Standby Switching supply 11
Vcc Switch (Power On) 13
Overview 13
Power ON 13
DC Protect 13
AC Protect 13
Soft Start 15
Overview 15
Soft Start - Power ON 15
Converter 17
Overview 17
Operation 17
T602 Secondary (Audio B+) 19
Overview 19
Operation 19
T601 Secondary-1 21
Overview 21
+/- 15 Volts 21
+ 11 Volts 21
+/- 22 Volts 21
Distribution 21
T601 Secondary-2 23
+7 Volts 23
+135 Volts 23
-135 Volts 23
+33 Volts 23
Table of Contents

Distribution 23
Regulation 25
Overview 25
Operation 25
DC Protection 27
Overview 27
Shut Down 27
+135 Volt Over Voltage 27
+135 Volt Over Current Protection 27
+19, +22, +7 Volt LVP 27
PS Troubleshooting 29
Overview 29
Troubleshooting 29
Protection Block 31
Overview 31
Diagnostic Indication 31
Circuit Description 33
Reset 35
Overview 35
Initial Reset 35
Power ON Reset 35
System Block Diagram 37
Overview 37
B (Standby) Bus 37
M (Main) Bus 37
P (Auto Registration) Bus 37
MID Bus 37
Video Path Block 39
Inputs 39
Main Video 39
Sub-Video 39
IC511 Video Processor 39
Input Switching 41
Overview 41
Inputs 41
Outputs 41
Main Y and C Buffers 43
Overview 43
Y Buffer 43
Sync Separator 43
C Buffer 43
3D Comb Filter 45
Overview 45
What is a 3D Comb Filter? 45
Circuit Description 45
Main Chroma Decoder 49
Overview 49
C Processing 49

Y Processing 49
H and V Sync 49
3.58 MHz 49
Main YUV Switch 51
Overview 51
Inputs 51
Output Selection 51
DRC - Digital Reality Creation 53
DRC Block 57
Overview 57
Inputs 57
DRC Processing 57
Outputs 57
Troubleshooting 57
MID - Multi Image Driver 59
MID Block 63
Overview 63
MID Inputs 63
MID Processing 63
MID Outputs 63
MID Troubleshooting 63
Video Processor 65
Overview 65
Video Processing 65
Sync Processing 65
IK/AKB 69
Overview 69
Video Drive 69
IK 69
Troubleshooting 69
Sync Paths 71
Overview 71
Sync Paths 71
Deflection Block 73
Overview 73
Vertical 73
Horizontal 73
High Voltage 73
Convergence 73
Horizontal Deflection Block 75
Horizontal Jungle 77
Overview 77
H Drive 77
H Out 79
Overview 79
H Drive 79
H Out 79
Horizontal Centering 79

Pin Amp 81
Overview 81
Pin Amp 81
H Protect/HP 83
Overview 83
HP 83
H Protect 83
Vertical Deflection Block 85
H BLK Delay and 1/2 H + Odd/Even 87
Overview 87
H BLK Delay 87
1/2 H and Odd/Even 87
VDSP 89
Overview 89
VCO 89
CDP 89
DSP 89
DAC 89
V Out 91
Overview 91
V Out 91
V Protect 91
High Voltage Block 93
HV Drive 95
Overview 95
HV Drive 95
Peak Drive 95
HV Regulation Control 99
Overview 99
Regulation Control 99
+12 High Voltage LVP 99
HV Regulation PWM 101
Overview 101
Sawtooth Generator 101
PWM 101
HV Stop 2 103
Overview 103
ABL 103
Hold Down 103
HV Stop 1 105
Overview 105
ABL 105
High Voltage Block Tap 105
+125 Volt OVP 105
Convergence Block 107
Overview 107
Convergence 107
Auto Focus (Auto Registration) 107

Sensor Amp 109
Overview 109
Auto Focus 109
Circuit Description 113
BD Input 115
Overview 115
Digital Convergence 115
BD Output 117
Overview 117
IC1707 Regi Correction 117
Convergence Out 119
Overview 119
Regi Mute 119
Convergence Amp 119
Service Mode 121
Overview 121
Normal Service Mode 121
PJED Mode 121
Protection Block 127
Overview 127
Diagnostic Indication 127
Circuit Description 129

1
Features
Overview
The models covered by this manual are the new KP53XBR200 and the
KP61XBR200. These two models are electrically identical. The differ-
ences have to do with screen size. Therefore they use different cabinets,
screens, mirrors and tubes. These sets also have a Self Diagnostic sys-
tem.
Picture
The two models share the following picture features:
··
··
·Advanced Pro-Optic System – Sony technology that allows full cor-
ner to corner focusing.
··
··
·New Extended Definition CRT – Allows corner to corner focusing to
be increased by 25% over last year’s model.
··
··
·MICROFOCUS Lens System
··
··
·Digital Reality Creation (DRC) – DRC uses line doubling and pat-
tern recognition algorithms to take the NTSC signal to a near HDTV
equivalent. This will be discussed in more detail later.
··
··
·Double Scan Technology
··
··
·Auto Focus Full Digital Convergence – Allows the setting of V and
H center and skew by the customer. This convergence system can
produce a sharper picture and is less susceptible to drift due to aging
or shipment.
··
··
·High Performance Video Processor
··
··
·3D Digital Comb Filter
··
··
·Brightview Dual Component Screen – The screen contains a Thin
Film Fresnel that brightens and sharpens the picture, and a Fine Pitch
Lenticularscreenthatachieves higherresolution byusing blackstripes
to increase contrast.
··
··
·Built-in High Contrast Screen
··
··
·First Surface Mirror – Unlike most mirrors, the reflective surface is
on the front of the mirror glass. This improves brightness and con-
trast, and eliminates ghosting caused by the reflected light passing
through the glass.
··
··
·Advanced Velocity Modulation
··
··
·Advanced High Voltage Regulation – Eliminates distortion and fo-
cus fluctuations that occur when changes in brightness levels cause
changes in the high voltage.
··
··
·Noise Reduction
··
··
·Shading Compensation – Eliminates color shift and hot spots that
can occur due to the angle of the picture tubes to the mirror.
··
··
·Wideband Video Amplifier
··
··
·Multi Image Driver – Digital-editing technology that provides versatil-
ity in controlling on-screen images. Used in Picture and Picture and
Channel Index modes.
··
··
·Twin View Picture-in-Picture – Allows for viewing two pictures si-
multaneously and the ability to expand either image up to double its
normal size.
··
··
·Free Layout Picture-in-Picture –Allowsthe PIPwindow tobe placed
anywhere on the screen.
··
··
·XDS (Extended Data Service) – Receives data information services
that some stations may broadcast. This data includes time, station
call letters, etc.
Audio
The two models share the following audio features:
··
··
·MTS Stereo with dbx NR
··
··
·Dolby Pro Logic Surround Sound
··
··
·Front Left/Right Audio Power - 20Wx2
··
··
·Center Audio Power – 20W
··
··
·Surround Audio Power – 15Wx2
··
··
·Center speaker input for use with a separate Dolby Pro Logic A/
V Reciever

2
NOTES