Sony KP-43T70, KP-46C70, KP-48S70, KP-48S72, KP-53S70 Service Manual

...

SERVICE MANUAL

RA-3

CHASSIS

MODEL

COMMANDER DEST. CHASSIS NO.

KP-43T70 RM-Y906 US SCC-P14GA KP-43T70 RM-Y906 Canadian SCC-P14GA KP-46C70 RM-Y906 US SCC-P14JA KP-46C70 RM-Y906 Canadian SCC-P14JA KP-48S70 RM-Y906 US SCC-P14HA KP-48S70 RM-Y906 Canadian SCC-P14HA KP-48S72 RM-Y906 US SCC-P14KA

CORRECTION -1

Subject : Correction of set-up adjustments

File this correction with the service manual.

MODEL

COMMANDER DEST. CHASSIS NO.

KP-48S72 RM-Y906 Canadian SCC-P14KA KP-53N74 RM-Y906 US SCC-P14EA KP-53N74 RM-Y906 Canadian SCC-P14EA KP-53S70 RM-Y906 US SCC-P14DA KP-53S70 RM-Y906 Canadian SCC-P14DA KP-61S70 RM-Y906 US SCC-P14FA KP-61S70 RM-Y906 Canadian SCC-P14FA

TABLE OF CONTENTS

Section Title Page –––––– –––– ––––

3. SET-UP ADJUSTMENTS

3-1. Screen Voltage Adjustment (Coarse Adjustment) ................................. 2

3-2. Screen (G2) Adjustment (Fine Adjustment) ......................................... 2

3-3. Deflection York Tilt Adjustment ........................................................... 2

3-4. Focus Lens Adjustment ......................................................................... 2

3-5. Focus VR Adjustment ........................................................................... 3

3-6. 2-Pole Magnet Adjustment (Green, Red) ............................................. 3

3-7. 4-Pole Magnet Adjustment ................................................................... 3

3-8. Defocus Adjustment (Blue) .................................................................. 3

3-9. Electrical Adjustment by Remote Commander .................................... 4

3-10. Registration Adjustment (PJE) .............................................................. 9

3-11. Auto Registration Error Code List ..................................................... 12

Please file according to model size. ..........

48 53 6146

KP-43T70/46C70/48S70/ 48S72/53N74/53S70/61S70

RM-Y906

SECTION 3

SET-UP ADJUSTMENTS

3-1. SCREEN VOLTAGE ADJUSTMENT

(COARSE ADJUSTMENT)

1. Receive the Monoscope signal.

2. Set 50% BRIGHTNESS and minimum PICTURE.

3. Turn the red VR on the FOCUS block all the way to the left and then gradually turn it to the right until the point where you can see the retrace line.

4. Next gradually turn it to the left to the position where the retrace line disappears.

R G B

SCREEN

R G B

FOCUS

FOCUS block

Fig. 3-1

3-2. SCREEN (G2) ADJUSTMENT

(FINE ADJUSTMENT)

Fine Mode is recommended to set screen controls to their optimal condition. It is necessary to build the simple jig, illustrated below, using 3-watt resistors. Please note, that if the proper voltage is not obtained with their listed values, resistors, then please increase or decrease one of the values in the resistor network to obtain the correct voltage.

1. Select VIDEO1 mode without signals.

2. Connect G2 JIG.

3. SW on JIG.

4. Connect an oscilloscope to the TP701(KR), TP732(KG) and TP761(KB) of CR board, CG board and CB board.

5. Adjust R, G and B screen voltage to 170-173V with screen VR on the Focus block.

G2 JIG

3.3k 5.6k 5.6k 5.6k

210V GND

the mode Cover the both green and red picture lenses with the lens caps is aligned the same as was done for green.

Note: Instead of items 3 and 6, you can cut off the unnecessary

color beams by controlling the service mode VPNT 28 RON, 29 GON, and 30 BON.

4-pole magnet

2-pole magnet

Fig. 3-3

Deflection yoke

Anode cap

3-4. FOCUS LENS ADJUSTMENT

In this adjustment, use the remote commander in the service mode. For details of the usage of the service mode and the remote commander, please refer the item 3-9. ELECTRICAL ADJUSTMENT BY REMOTE COMMANDER.

1. Loosen the lens screw.

2. Set to the service mode.

3. Receive the all-white signal.

4. Cover the both red and blue picture lenses with the lens caps to show only the green color.

5. Set to PJE, and press 6 to display the test signal (crosshatch)“ on the screen.

6. Turn the green lens to adjust to the optimum focus point with the test signal.

7. Tighten the lens screw.

8. Cover the both green and blue picture lenses with the lens caps to show only the red color.

9. Set to PJE, and press 6 to display the test signal (crosshatch)“ on the screen.

10. Adjust red CRT lens just the same as green.

11. Cover the both green and red picture lenses with the lens caps to show only the blue color.

175 ± 2V

GND

pedestal level

Fig. 3-2

3-3. DEFLECTION YOKE TILT ADJUSTMENT

1. Receive the Monoscope signal.

2. Set in service mode.

3. Cover the both red and blue picture lenses with the lens caps to show only the green color.

4. Loosen the deflection yoke set screw and align the tilt of the Deflection Yoke so that the bars at the center of the monoscope pattern are horizontal.

5. After aligning the deflection yoke, fasten it securely to the funnel-shaped portion (neck) of the CRT.

6. The tilt of the deflection yoke for red is aligned in the mode Cover the both green and blue picture lenses with the lens caps and the tilt of the deflection yoke for blue is aligned with in

Test signal

Fig. 3-4

12. Set to PJE, and press 6 to display the test signal (crosshatch)“ on the screen.

13. Adjust blue CRT lens just the same as green.

14. After adjusting the items 3-5. Focus VR Adjustment, 3-6. 2Pole Magnet Adjustment and 3-7. 4-Pole Magnet Adjustment, adjust again to the optimum focus point.

*: Every time you press 6, the test signal changes to

“crosshatch+video signal” - “dots+video signal” - “crosshach(black)” - “dots(black)” - off.

Note: Instead of items 4, 8 and 11, you can cut off the unnecessary

color beams by controlling the service mode VPNT 28 RON, 29 GON, and 30 BON.

– 2 –

KP-43T70/46C70/48S70/

x : y = 1:1.5 (BIue) x : y = 1:1 (Green, Red)

Use the center dot

48S72/53N74/53S70/61S70

RM-Y906

3-5. FOCUS VR ADJUSTMENT

1. Set to the service mode.

2. Receive the all-white signal.

3. Cover the both red and blue picture lenses with the lens caps to show only the green color.

4. Set to PJE, and press 6 to display the test signal (crosshatch) on the screen.

5. Turn the green focus VR on the focus block to adjust to the optimum focus point with the test signal.

6. Cover the both green and blue picture lenses with the lens caps to show only the red color.

7. Set to PJE, and press 6 to display the test signal (crosshatch) on the screen.

8. Turn the red focus VR on the focus block to adjust to the optimum focus point with the test signal.

9. Cover the both green and red picture lenses with the lens caps to show only the blue color.

10. Set to PJE, and press 6 to display the test signal (crosshatch) on the screen.

11. Turn the blue focus VR on the focus block to adjust to the optimum focus point with the test signal.

12. After adjusting the items 3-4. Focus Lens Adjustment, 3-6. 2Pole Magnet Adjustment and 3-7. 4-Pole Magnet Adjustment, adjust again to the optimum focus point.

Note: Instead of items 3, 6 and 9, you can cut off the unnecessary

color beams by controlling the service mode VPNT 28 RON, 29 GON, and 30 BON.

Use the center dot

Fig. 3-7

3-7. 4-POLE MAGNET ADJUSTMENT

1. Receive the Dot signal.

2. Set in service mode.

3. Cover the both red and blue picture lenses with the lens caps to show only the green color.

4. Turn the green focus VR on the focus block to the left and set to underfocus to enlarge the spot.

5. Now align the 4-Pole Magnet so that the enlarged spot becomes a perfect circle for green and red.

6. Perform the same alignment for blue.

Scanning line visible.

Minimize both A and B.

Lens

Center of crosshatch

Fig. 3-6Fig. 3-5

3-6. 2-POLE MAGNET ADJUSTMENT

(GREEN,RED)

1. Receive the Dot signal.

2. Set in service mode.

3. Cover the both red and blue picture lenses with the lens caps to show only the green color.

4. Turn the green focus VR on the focus block to the right and set to overfocus to enlarge the spot.

5. Now align the 2-Pole Magnet so that the enlarged spot is in the center of the Just Focus spot.

6. Align the green focus VR and set for just (precise) focus.

7. Perform the same alignment for red.

Fig. 3-8

3-8. DEFOCUS ADJUSTMENT (BLUE)

Note: Please adjust the blue dot to be slightly larger than red and

green dots. This adjustment provides a more pleasing picture to the customer.

1. Select the video menu and set the mode to “VIVID” mode.

2. Set to the service mode.

3. Change TV mode to the video input mode.

4. Set to PJE, and press 6 to display the test signal (dots) on the screen.

5. Turn the blue focus VR on the focus block to adjust to the diameter of the dots as shown in the figure below.

[Focus adjustment point]

Lmm Max

Inch

43"

46"

6.5

Fig. 3-9

48"

53"861"

– 3 –

KP-43T70/46C70/48S70/

atad

ENTER

JUMP

GUIDE

INDEX

RESET

POWER

MUTING

FREEZE

AUDIO

ANT

TV/VIDEO

DISPLAYMTS/SAP

PICTURE

MODE

POSITION ACTIVE

SWAP PIP

TV/VTR

SYSTEM

OFF

DVD/VTR SAT/CABLE

DVD/

VTR

SAT/

CABLE

FUNCTION

SLEEP

48S72/53N74/53S70/61S70

RM-Y906

3-9. ELECTRICAL ADJUSTMENT BY REMOTE

COMMANDER

By using Remote Commander (RM-Y906),all circuit adjustments

can be made.

NOTE : Test Equipment Required.

1. Pattern Generator (with component outputs)

2. Frequency counter

3. Digital multimeter

4. Audio oscillator

1. METHOD OF SETTING THE SERVICE ADJUSTMENT MODE

SERVICE MODE PROCEDURE

1. Standby mode. (Power off)

2. DISPLAY n 5 n VOL (+) n TV POWER

on the Remote Commander.

(Press each button within a second.)

SERVICE MODE ADJUSTMENT

Category Adjustment item

DATA

SERVICE VPNT VPOS 031 000000 00

7. If you want to recover the latest values press - then [ENTER] to

read the memory.

8. Press [MUTING] then [ENTER] to write into memory.

9. Turn power off. Note: Press 8 then [ENTER] on the Remote Commander to initialize

or turn set off and on to exit.

2. MEMORY WRITE CONFIRMATION METHOD

1. After adjustment, remove the plug from AC outlet, and then

replace the plug in AC outlet again.

2. Turn the power switch ON and set to Service Mode.

3. Call the adjusted items again and confirm they were adjusted.

3. ADJUSTING BUTTONS AND INDICATOR

TV POWER ON

MUTING

(SCREEN DISPLAY)

3. The SCREEN displays the item being adjusted.

4. Press 1 or 4 on the Remote Commander to select the

adjustment item.

5. Press 3 or 6 on the Remote Commander to change the data.

6. Press 2 or 5 on the Remote Commander to select the

category.

Every time you press 2(Category up), Service mode changes

in the order as shown below.

VPNT

VPNV

VPNS

PJE

3DCM

TONE

DSP

DAC

CCD

Category up

Adjustment item up

Adjustment item down

VOL (+)

RM-Y906

Note : When the PJE mode is activated, which displays an

internally generated signal, several buttons on the remote

commander will have different functions than listed

above. Therefore, when in the PJE mode, refer to page 9

for button functions.

DISPLAY

Data up

Data down

Category down

ENTER

– 4 –

+ 8 hidden pages