Sony TRINITRON KV-20S90, RM-Y155 Service Manual

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Page 1

Self Diagnosis

Supported model

SERVICE MANUAL

MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.

KV-20S90

RM-Y155 US SCC-S27NA

BA-4D

CHASSIS

Trinitron

KV-20S90

RM-Y155

TRINITRON® COLOR TELEVISION

9-965-905-01

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SECTION 4: CIRCUIT ADJUSTMENTS

ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER

Use the Remote Commander (RM-Y155) to perform the circuit adjustments in this section.

Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator

KV-20S90 / 21SE43C

4-1. SETTING THE SERVICE ADJUSTMENT MODE

1. Standby mode (Power off).

2. Press the following buttons on the remote commander within a second of each other:

Display

Channel 5 Sound Volumne + Power

SERVICE ADJUSTMENT MODE ON

1. The CRT displays the item being adjusted.

Item

Data

to write into memory.

2. Press

3. Press

4. Press

then

Display

Item

HSIZ

ENTER

Mode

SERVICE

or 4 on the Remote Commander to select the item.

or 6 on the Remote Commander to change the data.

MUTING

SERVICE ADJUSTMENT MODE MEMORY

Mode

1. Press

SERVICE

then

ENTER

MUTING

WRITE

ENTER

on the Remote Commander to initialize.

Green

Red

4-2. MEMORY WRITE CONFIRMATION METHOD

1. After adjustment, pull out the plug from the AC outlet, then replace the plug in the AC outlet again.

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

3. Call the adjusted items again to conﬁ rm they were adjusted.

4-3. REMOTE ADJUSTMENT BUTTONS AND INDICATORS

MUTING

(Enter into memory)

DISPLAY

(Service Mode)

Disp. (Item up)

(Device Item Up)

Disp. (Item down)

(Initialize)

VOLUME (+)

(Service Mode)

POWER

(Service Mode)

Item (Data up)

Item (Data down)

(Device item down)

ENTER

(Enter into memory)

0 (Remove from memory)

Mode

SERVICE RESET

2. Turn set off then on to exit service adjustment mode.

Carry out Step 1 when adjusting IDs 0-7 and when replacing and adjusting IC003

RM-Y155

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Page 3

ADJUSTMENT ITEMS (1 OF 2)

KV-20S90 / 21SE43C

DATA

Reg # ITEM FUNCTION

1 HSIZ Horizontal Amp. Adjustment 0-31 31 31 2 HPOS Horizontal Position Adjustment 0-31 21 20 3 VBOW Vertical Line Bowing Adj. 0-15 6 6 4 VANG Vertical line Bowing Slant Adj. 0-15 6 6 5 TRAP Horizontal Trapezoid Adj. 0-15 15 15 6 PAMP Horizontal PIN Distortion Adj. 0-31 31 31 7 CPIN SAME AS PAMP-SCRN TP/BTM 0-31 31 31 8 VSIZ Vertical Amp. Adjustment 0-31 43 37

9 VPOS Vertical Position Adj. 0-31 35 38 10 VLIN Vertical Linearity Adj. 0-15 7 7 11 SCOR Vertical Amount Adj. 0-15 7 7 12 VZOM Vertical Zooming 0,1 0 0 13 EHT Vertical High-Voltage Correction 0-15 15 4 14 ASP Aspect Ratio Control 0-63 47 47 15 SCRL 16:9 CRT Z Mode Trans. Scroll 0-31 31 31 16 HBLK RGB Out Width Control 0,1 1 1 17 LBLK Left Screen HBLK Control 0-15 15 15 18 RBLK RGT Screen HBLK Control 0-15 3 3 19 VUSN V Saw Waveform Compress 0,1 0 0 20 HDW Horizontal Drive Pulse Width 0,1 1 0 21 EWDC EW/ D.C. Adjustment 0,1 0 0 22 LVLN Lower Screen BTM Vertical Line Adj. 0-15 0 0 23 UVLN Upper Screen Top Vertical Line Adj. 0-15 0 0 24 RDRV R Output Drive Control 0-31 30 27 25 GDRV G Output Drive Control 0-31 24 22 26 BDRV B Output Drive Control 0-31 21 22 27 RCUT R Output Cutoff Control 0-15 10 9 28 GCUT G Output Cutoff Control 0-15 7 4 29 BCUT B Output Cutoff Control 0-15 7 4 30 DCOL Dynamic Color On/Off 0,1 0 0 31 SHUE Sub HUE 0-15 15 18 32 SCOL Sub Color 0-15 14 18 33 SBRT Sub BRIGHTNESS 0-15 7 10 34 RON R Output On/Off 0,1 1 1 35 GON G Output On/Off 0,1 1 1 36 BON B Output On/Off 0,1 1 1 37 AXPL Axis PAL 0,1 0 0 38 AXNT Axis NTSC 6.00 ± 0.8 0 0 39 CBPF Chroma BPF On/Off 0,1 1 1 40 CTRP Y TRAP FILTER On/Off 6.00 ± 0.9 0 1 41 COFF Color On/Off 0,1 0 0 42 KOFF Set Color Killer 6.00 ± 0.8 0 0 43 SSHP Sub SHARPNESS 0-15 9 6 44 SHPF SHARPNESS Circuit Fo 0,1 1 1 * 45 PREL Pre-Shoot / Over-Shoot Switching 0,1 1 1 46 Y-DC Axis NTSC 0,1 1 1 47 GAMM Chroma BPF On/Off 0,1 0 0 48 VTH Color On/Off 0,1 1 1 49 ABLM ABL Control Mode 0,1 1 1 50 YDEL Set Color Killer 0,1 7 7 51 NCOL Sub Sharpness 0-15 1 1

RANGE

INITIAL

DATA VIDEO

AVERAGE

* = TV/VIDEO = 0

DATA

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ADJUSTMENT ITEMS (2 OF 2)

KV-20S90 / 21SE43C

DATA

Reg # ITEM FUNCTION

52 FSC G Output On/Off 0,1 0 1 53 K-ID B Output On/Off 0,1 0 0 54 HOSC Horizontal VCO Oscillation Freq. 0-15 10 7 55 VSS Vertical Sync Slice Level 0,1 0 0 56 HSS Horizontal Sync Slice Level 0,1 0 0 57 HMSK HMASK On/Off 0,1 1 1 58 VTMS Select Signal VTIM Pin 0-3 0 0 59 CDMD Vertical Count Down Mode Switching 0-3 3 3 ** 60 AFC AFC Loop Gain Switching 0-3 0 0 * 61 FIFR Field Frequency 0-3 3 3 62 SBAS Sub Bass 0-15 8 8 63 STRE Sub Treble 0-15 9 9 64 SBAL Sub Balance 0-15 13 13 65 DISP O.S.D Display Position 0-127 15 5 66 PADJ POWER ADJUSTMENT 0-63 51 42 67 HCHM H SYNCH SEP. LIMIT FOR TUNER 0-127 69 69 68 HCLM H SYNCH SEP. LIMIT FOR TUNER 0-127 16 16 69 HCHS H SYNCH SEP. LIMIT FOR VIDEO 0-127 69 69 70 HCLS H SYNCH SEP. LIMIT FOR VIDEO 0-127 16 16 71 ID0 0-255 SEE ID MAP 72 ID1 0-255 SEE ID MAP 73 ID2 0-255 SEE ID MAP 74 ID3 0-255 SEE ID MAP 75 ID4 0-255 SEE ID MAP 76 ID5 0-255 SEE ID MAP 77 ID6 0-255 SEE ID MAP 78 ID7 0-255 SEE ID MAP

RANGE

INITIAL

DATA VIDEO

AVERAGE

DATA

* = TV/VIDEO = 0 ** = TV = 0, VIDEO = 1

Notes:

Mode

No. 1-78 show the order that each adjustment mode may be selected while in Service Mode. Data Range shows the range of possible setting for each Adjustment Mode. Initial Data shows the standard settings for each Adjustment Mode.

Function

SERVICE

ID0 25

Data

ID MAP

Model Destination ID-0 ID-1 ID-2 ID-3 ID-4 ID-5 ID-6 ID-7

KV-20S90 US 25 3 1 227 3100

KV-21SE43C E 17 3 1 195 115 1 0 0

4-4. A BOARD ADJUSTMENTS

H. FREQUENCY ADJUSTMENT

1. InputTV mode (RF) with no signal.

2. Set to Service Adjustment Mode.

3. Connect a frequency counter to base of Q501 (TP-500 H. DRIVE).

4. Check H. Frequency for 15735 ± 200 Hz.

5. Press

MUTING

then

ENTER

to save into the memory.

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V. FREQUENCY CHECK

1. Select video 1 with no signal input.

2. Set the conditions for a standard setting.

3. Connect the frequency counter to TP-508 or CN501 pin

connector and ground.

4. Check that V. Frequency shows 60 ± 4 Hz.

SUB CONTRAST ADJUSTMENT (RDRV)

(V DY+)

KV-20S90 / 21SE43C

DISPLAY POSITION ADJUSTMENT (DISP)

1. Input a color-bar signal.

2. Set to Service Adjustment Mode.

3. Select DISP with

4. Adjust values of DISP with

5. Write to memory by pressing

6. Check to see if the text is displayed on the screen.

and 4 .

and 6 to adjust characters to the center.

MUTING

then

ENTER

1. Input a color-bar signal.

2. Set the red color on (1).

3. Set in Service Adjustment Mode.

4. Select the item DCOL level to 0.

5. Set the conditions as follows: PICTURE: MAX COLOR: MIN BRIGHT: CENTER

R ON: ON (1) G ON: OFF (0) B ON: OFF (0)

Mode

SERVICE

Display

Item

RON

6. Connect an oscilloscope probe to CN301 pin

1: ON 0: OFF

ground .

7. Select RDRV with

8. Adjust the value of RDRV with

and 4 .

and 6 for

1.50 ± 0.05 Vpp.

White

1.50 ± 0.05 Vpp

(Red Out) and

Mode

SERVICE DISP 15

Display

Item

Item Data

SUB BRIGHT ADJUSTMENT (SBRT)

1. Input a crosshatch signal.

2. Set to Service Adjustment Mode.

3. Set the PICTURE and BRIGHTNESS to minimum.

4. Select the SBRT item with

5. Adjust the values of SBRT with

and 4 .

and 6 to obtain a faintly visible

crosshatch.

6. Press

MUTING

then

ENTER

to save into the memory.

SUB HUE, SUB COLOR ADJUSTMENT (SHUE, SCOL)

1. Input a color-bar signal.

2. Set to Service Adjustment Mode.

3. Connect a probe to TP47B B-OUT (C Board).

4. Measure white V1 and blue V4.

4.1) Increase SCOL Register +1 setp.

Black

9. Reset the item DCOL to 1.

10. Press

MUTING

then

ENTER

11. Return the following back to normal after adjustment.

PICTURE: MAX COLOR: CENTER BRIGHT: CENTER

R ON: ON (1) G ON: OFF (1) B ON: OFF (1)

to save into the memory.

5. Press

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STANDARD |V4 - V1| = ± 0.2Vpp |V3 - V2| = ± 0.2Vpp

MUTING

then

ENTER

V2 V3

to save into the memory.

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KV-20S90 / 21SE43C

V. SIZE ADJUSTMENT (VSIZ)

1. Input a crosshatch signal.

2. Activate the Service Adjustment Mode.

3. Select the VSIZ item with

4. Adjust value of VPOS with

5. Press

MUTING

then

and 4 .

and 4 for the best vertical center.

ENTER

to save into the memory.

V. CENTER ADJUSTMENT (VPOS)

1. Input a crosshatch signal.

2. Set to Service Adjustment Mode.

3. Select the VPOS item with

4. Adjust value of VPOS with

5. Press

MUTING

then

and 4 .

and 6 for the best vertical center.

ENTER

to save into the memory.

SERVICE ADJUSTMENT MODE MEMORY

1. Change the value of the DCOL item to 1. ENTER

2. After completing all adjustments, press

Read From Memory

Mode

SERVICE READ

then

Green

Red

ENTER

H. CENTER ADJUSTMENT (HPOS)

Perform this adjustment after performing H. Frequency.

1. Input a crosshatch signal.

2. Set to Service Adjustment Mode.

3. Select the HPOS item with

4. Adjust the value of HPOS with

5. Press

MUTING

then

and 4 .

ENTER

and 6 for the best horizontal center.

to save into the memory.

V. LINEARITY (VLIN), V. CORRECTION

1. Input a crosshatch signal.

2. V.Correction is automatically adjusted from the circuit and should satisfy the conditions below.

V LINEARITY (VLIN)

V CORRECTION

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