KP-HW512K90 - Sony TV Service Manual (repair manual)

MODEL

  COMMANDER DEST. CHASSIS NO.

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MODEL

COMMANDER

DEST. CHASSIS NO.

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KP-HW512K90 

 RM-Y909K

Korean SCC-P73D-A

RM-Y909K

KP-HW512K90

– 2 –

Projection System

3 picture tubes, 3 lenses, horizontal in-line system

Picture Tube

7-inch high-brightness monochrome tubes (6.3 raster size), with optical 
coupling and liquid cooling system

Projection Lenses

High performance, large 
diameter hybrid lens F1.1

Antenna

75 ohm external terminal for VHF/UHF

Television System

NTSC, American TV Standard

Screen Size (measured diagonally)

51 inches

 

Channel Coverage
 VHF

2-13

 UHF

14-69

 CATV

1-125

Power Requirements

220 V AC, 60 Hz

Number of Inputs/Outputs

Video (IN)

4

1 Vp-p, 75 ohms unbalanced, sync negative

S Video (IN)

3

Y: 1 Vp-p, 75 ohms unbalanced, sync negative

C: 0.286 Vp-p (Burst signal), 75 ohms

Audio (IN)

6

500 mVrms (100% modulation)

Impedance: 47 kiloohms

AUDIO (VAR/FIX)

1 

500 mVrms at the maximum volume setting 
(Variable)
500 mVrms (Fixed)
Impedance (output): 2 kiloohms

TV Out

1 

Video: 1 Vp-p 75 ohms unbalanced, Sync 
negative

Audio: 500 mVrms (100% modulation)

Impedance (output): 1 kiloohms

CONTROL S (IN/OUT)

1 

Minijacks

Component Video Input

2 (Y, P

B

, P

R

)

Y: 1.0 Vp-p, 75 ohms unbalanced, sync 
negative

P

B

: 0.7 Vp-p, 75 ohms

P

R

: 0.7 Vp-p, 75 ohms

 RF Inputs

2

 Converter

1

Speaker Output

20 W x 2

Dimensions (W x H x D)

1,194 x 1,310 x 630 mm 

 

Mass

76 kg

Power Consumption

In Use

230 W 

In Standby

1.2 W 

Supplied Accessories

Remote Control

RM-Y909K 

AA (R6) Batteries

2 supplied for remote control

 

 

Design and specifications are subject to change without notice.   

– 3 –

(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.

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.

– 4 –

Section

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2-1.

REAR BOARD REMOVAL ....................................... 8

2-2.

CHASSIS ASSY REMOVAL ..................................... 8

2-3.

SERVICE POSITION ................................................. 8

2-4.

H2 BOARD REMOVAL ............................................. 8

2-5.

H1 BOARD REMOVAL ............................................. 9

2-6.

H3 BOARD REMOVAL ............................................. 9

2-7.

MIRROR COVER REMOVAL .................................. 9

2-8.

BEZNET ASSY REMOVAL ...................................... 9

2-9.

AD BOARD AND B BOARD REMOVAL .............. 10

2-10.

F BOARD  AND G BOARD REMOVAL ................ 10

2-11.

A BOARD, D BOARD AND
U BOARD REMOVAL ............................................. 10

2-12.

PICTURE TUBE REMOVAL .................................. 11

2-13.

HIGH-VOLTAGE CABLE INSTALLATION AND
REMOVAL ................................................................ 11

3-1.

SCREEN VOLTAGE ADJUSTMENT
(COARSE ADJUSTMENT) ..................................... 12

3-2.

SCREEN (G2) ADJUSTMENT
(FINE ADJUSTMENT) ............................................ 12

3-3.

DEFLECTION YOKE TILT ADJUSTMENT .......... 12

3-4.

 FOCUS LENS ADJUSTMENT ............................... 12

3-5.

FOCUS VR ADJUSTMENT .................................... 13

3-6.

2-POLE MAGNET ADJUSTMENT ........................ 13

3-7.

CENTERING MAGNET ADJUSTMENT ............... 13

3-8.

4-POLE MAGNET ADJUSTMENT ........................ 13

3-9.

DEFOCUS ADJUSTMENT (BLUE) ........................ 13

3-10.

ELECTRICAL ADJUSTMENT BY REMOTE
COMMANDER ........................................................ 14

3-11.

REGISTRATION ADJUSTMENT ........................... 25

3-12.

AUTO CONVERGENCE OFFSET .......................... 29

3-13.

AUTO REGISTRATION ERROR CODE LIST ...... 29

4-1.

P & P SUB CONTRAST
ADJUSTMENT (VIDEO) (SCON) .......................... 31

4-2.

P & P SUB CONTRAST
ADJUSTMENT (RF) (SCON) .................................. 31

4-3.

 P & P SUB-HUE AND
SUB-COLOR  ADJUSTMENT (SHUE, SCOL) ...... 31

4-4.

P & P SUB-HUE AND
SUB-COLOR ADJUSTMENT (SHUE, SCOL) ....... 31

4-5.

BLUE OFFSET ADJUSTMENT .............................. 32

5-1.

HV REGULATION CIRCUIT CHECK AND
ADJUSTMENT ......................................................... 33

5-2.

HV HOLD DOWN CIRCUIT OPERATION
CHECK AND ADJUSTMENT ................................. 33

5-3.

+B MAX VOLTAGE CONFIRMATION ................. 33

5-4.

+B OVP CONFIRMATION ...................................... 33

6-1.

BLOCK DIAGRAM (1) ........................................... 34
BLOCK DIAGRAM (2) ........................................... 35
BLOCK DIAGRAM (3) ........................................... 36
BLOCK DIAGRAM (4) ........................................... 37
BLOCK DIAGRAM (5) ........................................... 38
BLOCK DIAGRAM (6) ........................................... 39
BLOCK DIAGRAM (7) ........................................... 40
BLOCK DIAGRAM (8) ........................................... 41
BLOCK DIAGRAM (9) ........................................... 42
BLOCK DIAGRAM (10) ......................................... 43
BLOCK DIAGRAM (11) .......................................... 44

6-2. CIRCUIT BOARDS LOCATION ................................. 45
6-3. SCHEMATIC DIAGRAMS .......................................... 45
6-4. PRINTED WIRING BOARDS ..................................... 74
6-5. WAVEFORMS ............................................................... 88
6-6. IC BLOCK DIAGRAMS ............................................... 90
6-7. SEMICONDUCTORS ................................................... 94

7-1.

COVER ..................................................................... 95

7-4.

CHASSIS .................................................................. 96

7-7.

PICTURE TUBE ....................................................... 97

8. ELECTRICAL  PARTS  LIST···································· 

98