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– 4 –

•

In cases of malfunctions where it is not possible to determine the symptom such as when the power goes off occasionally or when

the screen disappears occasionally, there is a screen display on whether the malfunction occurred or not in the past (and whether

the detection circuit operated or not) in order to allow confirmation.

•

Quickly press the remote command button in the following order from the standby state.

Self Check

2 : +B   OCP      000

    2 : +B  OCP

000

    3 : +B  OVP

000

    4 : V Stop

000

    5 : AKB

000

    6 : H Stop

000

    7 : HV

000

    8 : Audio

000

101 : WDT

000

000

 the range of values for number of 

operations is 000-255.
For 256 or higher there is no count up 
and the number remains at 255.

Diagnosis

Results

÷

•

The results display is not automatically cleared.  In case of repairs and after repairs, check the self-diagnosis screen and be sure

to return the results display to “ 0 ”.

•

If the results display is not returned to “ 0 ” it will not be possible to judge a new malfunction after completing repairs.

•

When ending the self-diagnosis screen completely, turn the power switch OFF on the remote commander or the main unit.

   ˘

   Be aware that this differs from the method of 

   entering the service mode (volume   +   ).

DISPLAY   b   Channel    5   b   VOL    –    b   POWER

1. Power off (Set to the standby mode)

2. DISPLAY   b   Channel    5    b   VOL    +    b    POWER    (Service Mode)  

3. Channel    8   b   ENTER   (Test reset = Factory preset condition)

– 5 –

OCP

Low B and +B line detect DET SHORT, and shut-down POWER ON RELAY.

Reset by turning power on/off.

In case of +B is loaded approx. 1.3A or more, microcomputer detects it via IC651.

OVP

In case of +B becomes approx. 150V or more, POWER ON RELAY shuts down and microcomputer detects it via IC651.

Reset by turning power on/off just the same as OCP.

V Stop

In case of microcomputer detects 2 seconds or more interval of V Pulse, Reference Pulse turns off by turning off the picture

signal in YC Jungle IC (IC206).

After the picture signal turns off, V Pulse is regenerated 2 seconds or more, the picture signal turns on.

AKB

IK detection.  Makes LED blinking in case of microcomputer doesn’t detect IK returns of IC206 CXA2147Q 30 seconds or more.

H Stop

In case of HV becomes 33kV or more, IC502 detects it and shut-down H Drive Pulse.

Microcomputer receives H Stop data from IC206 and makes LED blinking.

Audio

In case of DC component overlaps the output of Audio Amp., microcomputer detects it and makes LED blinking.

Microcomputer forces to shut down the power.

55

8

20

21

22

49
47
50

3

27

34

35

43

5. AKB

5. AKB

3. OVP

2. OCP

4. V.STOP (V Pulse)

Audio

IC002

µ

Processor

IC206

CXA2147

YCJ

Q006

D1201

TIMER/STANDBY

IC064

EEPROM

IC1502

HV Detector

Q1505

V Pulse Buffer

IC651

OVP Buffer
OCP Buffer

C Board

DC Detect

IC1509
V Drive

IC406

Audio AMP

6. H STOP

6. HV STOP

BUS

4

48

OVP DETECT

OCP DETECT

– 6 –

(CAUTION)

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CAR-
BON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.

WARNING!!

AN ISOLATION TRANSFORMER SHOULD BE USED DURING
ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BE-
CAUSE OF LIVE CHASSIS.
THE CHASSIS OF THIS RECElVER IS DIRECTLY CONNECTED
TO THE AC POWER LINE.

Section

Title

Page

––––––

––––

––––

Section

Title

Page

––––––

––––

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SELF DIAGNOSIS FUNCTION ............................................ 4

Remote Control ....................................................................... 7
Precautions .............................................................................. 7
Installing and Connecting the Projection TV .......................... 8
Basic Set Up .......................................................................... 12
Using Your New Projection TV ............................................ 13
Adjusting Your SET UP (menus) .......................................... 16
Operating Video Equipment .................................................. 21
Operating a Cable Box .......................................................... 22
Troubleshooting .................................................................... 23

2-1.

Rear Board Removal ................................................. 24

2-2.

Chassis Assy Removal .............................................. 24

2-3.

Service Position ......................................................... 24

2-4.

HA Board and HB Board Removal
(Except KP-43T70K/43T70T) .................................. 24

2-5.

HA Board and HB Board Removal
(KP-43T70K/43T70T) .............................................. 25

2-6.

Mirror Cover Removal .............................................. 25

2-7.

Beznet Assy Removal ............................................... 25

2-8.

HC Board and S Board Removal .............................. 25

2-9.

A ,G and FA Boards Removal ................................... 26

2-10.

Picture Tube Removal ............................................... 26

2-11.

High-Voltage Cable Installation and Removal .......... 26

3-1.

Screen Voltage Adjustment (Rough Alignment) ....... 27

3-2.

Focus Lens Adjustment ............................................. 27

3-3.

Screen (G2) Adjustment ............................................ 27

3-4.

Focus VR Adjustment ............................................... 27

3-5.

Deflection York Tilt Adjustment ............................... 28

3-6.

2-Pole Magnet Adjustment (Green, Red) .................. 28

3-7.

4-Pole Magnet Adjustment ........................................ 28

3-8.

Defocus Adjustment (Blue) ....................................... 28

3-9.

Electrical Adjustment by Remote Commander ......... 29

3-10.

Registration Adjustment ............................................ 34

3-11.

Auto Registration Error Code List ............................ 37

4-1.

HV Regulation Circuit Check and Adjustment ......... 38

4-2.

HV Hold Down Circuit Operation and Adjustment .. 38

4-3.

+B Max Voltage Confirmation .................................. 38

4-4.

+B OVP Confirmation .............................................. 39

5-1.

TV Input Sub Contrast Adjustment
(VPNT-SCON) .......................................................... 40

5-2.

Video Input Sub-HUE and Sub-Color Adjustment
(VPNT-SHUE, SCOL) .............................................. 40

5-3.

Component Input Sub-HUE and SubColorAdjustment
(DAC-UVSH, UVSC) ............................................... 40

5-4.

P & P Sub Contrast Adjustment (SC-SYDR) ............ 40

5-5.

Sub-HUE, Sub-Color and Main Contrast Adjustment
(MC-MYDR, MSHU, MSCL, SC-SSHU, SSCL) .... 41

5-6.

Bar Display Position Adjustment (OP-DISP) ........... 41

5-7.

PIP Position Adjustment (PI-PIPH, PIPV) ................ 41

6-1.

Block Diagram (1) ..................................................... 43
Block Diagram (2) ..................................................... 45
Block Diagram (3) ..................................................... 51
Block Diagram (4) ..................................................... 55
Block Diagram (5) ..................................................... 57

6-2.

Frame Schematic Diagram ........................................ 61

6-3.

Circuit Boards Location ............................................ 64

6-4.

Printed Wiring Boards and Schematic Diagrams ...... 64

• A (1/3)Board ....................................................................... 65
• A (2/3)Board ....................................................................... 69

• A (3/3)Board ........................................................... 73
• G Board ................................................................... 81
• CG Board ................................................................ 88
• CR Board ................................................................ 88
• CB Board ................................................................ 89
• HA Board ................................................................ 91
• HC Board ................................................................ 91
• HB Board ................................................................ 92
• FA Board ................................................................. 93

6-5.

Semiconductors ......................................................... 94

7-1.

Cover (KP-43T70K/43T70T) .................................... 96

7-2.

Cover (KP-48VS70K) ............................................... 97

7-3.

Cover (KP-53VS70K/VS70T) .................................. 98

7-4.

Chassis (KP-43T70K/43T70T) ................................. 99

7-5.

Chassis (Except KP-43T70K/43T70T) ................... 100

7-6.

Picture Tube ............................................................ 101

................................. 102

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK 

!

 ON THE

SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE
THESECOMPONENTS WITH SONY PARTS WHOSE PART NUM-
BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL TO SAFEOPERATION ARE IDENTIFIED IN THIS
MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITI-
CAL COMPONENTS ARE REPLACED OR IMPROPER OPERA-
TION IS SUSPECTED.

– 7 –

The operating instructions mentioned here are partial abstracts from the
Operating Instructions Manual. The page numbers of the Operating
Instruction Manual remain as in the manual. (Part no : 3-867-647-31)

Names of the buttons on the remote control are
presented in different colors to represent the
available functions.

Transparent .... Press to select the component

you want to control; e.g. VTR
(VCR)/MDP/DVD Player,
CABLE, or projection TV.

Green ............... Buttons relevant to power

operations, like turning the
projection TV, CABLE, or VTR
(VCR)/MDP/DVD Player on
or off

White ............... TV/VTR (VCR)/MDP/DVD

Player/CABLE operation
buttons

Yellow .............. PIP operation buttons
Blue .................. SAT operation buttons*
Green ............... S-Link operation buttons
Pink .................. DVD Player operation buttons

m

N

M

x

z

X

V

v

B

b

* The blue-labeled SAT/

CABLE (POWER), SAT/
CABLE (FUNCTION),
INDEX and GUIDE
buttons cannot operate a
satellite receiver (SAT) in
Taiwan (the Republic of
China) even if it is
connected to the projection
TV.

Taiwan  Model

• Operate the projection TV only on 120 V

AC.

• The plug is designed, for safety purposes,

to fit into the wall outlet only one way. If
you are unable to insert the plug fully
into the outlet, contact your dealer.

• If any liquid or solid object should fall

inside the cabinet, unplug the projection
TV immediately and have it checked by
qualified service personnel before
operating it further.

• If you will not be using the projection TV

for several days, disconnect the power by
pulling the plug itself. Never pull on the
cord.

Clean the cabinet of the projection TV with a
dry soft cloth.  To remove dust from the
screen, wipe it gently with a soft cloth.
Stubborn stains may be removed with a cloth
slightly dampened with solution of mild
soap and warm water.  Never use strong
solvents such as thinner or benzine for
cleaning.

If the picture becomes dark after using the
projection TV for a long period of time, it
may be necessary to clean the inside of the
projection TV. Consult qualified service
personnel.

• To prevent internal heat buildup, do not

block the ventilation openings.

• Do not install the projection TV in a hot

or humid place, or in a place subject to
excessive dust or mechanical vibration.

• Avoid operating the projection TV at

temperatures below 5° C (41° F).

• If the projection TV is transported

directly from a cold to a warm location,
or if the room temperature changes
suddenly, the picture may be blurred or
show poor color. In this case, please wait
a few hours to let the moisture evaporate
before turning on the projection TV.

• To obtain the best picture, do not expose

the screen to direct illumination or direct
sunlight. It is recommended to use spot
lighting directed down from the ceiling
or to cover the windows that face the
screen with opaque drapery. It is
desirable to install the projection TV in a
room where the floor and walls are not of
a reflective material.