Toshiba 2152 DB Manual de servicio - Página 2

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TOSHIBA 2152 DB

Service Mode Cont'd

OTHER SERVICE FUNCTION

The following key entry during display of

adjustment menu provides special functions.

TEST SIGNAL SELECTION

Using method

Every pressing of

button changes the test

White balance adjustment

patterns on screen as described below in

White part.

SERVICE MODE.

White balance adjustment/check in light area.

Black part.

Signal off

NTSC signals (14 patterns)

White balance adjustment/check in dark area.

Making. approx. 1Vp-p signal in QA01.

PAL signals

(14 patterns)

Signals

Black cross-bar

About inside signal: The inside signal is output

White cross-bar

at video input terminal from QA01, and is not

output with the pin inserted into terminal.

Picture

(Single color signal can be output.)

Signals

Red single colour

Green single colour

Blue single colour

Using method

Black single colour

Picture position (horizontal, vertical and slant) in

White single colour

CRT adjustment.

Making approx. 1 Vp-p signal in QA01.

Picture

Signals

Black cross-hatch

White cross-hatch

Picture

Using method

Purity and White uniformity of CRT

Red single colour.

Stopping G and B output of Q501

Green single colour.

Stopping R and B output of Q501

Using method

Blue single colour.

Convergence and vertical amplitude adjustment

Stopping R and G output of Q501

Making approx. 1 Vp-p signal in QA01.

Black single colour.

Making black signal of approx. 1Vp-p in QA01

Signals

White single colour.

Black cross-dot

Making white signal of approx. 1Vp-p in QA01

White cross-dot

Signals

Picture

W/B adjustment

Picture

Using method

Convergence adjustment

Making approx. 1Vp-p signal in QA01.

Safety Instructions / Safety Parts / Service Adjustments / Service Mode General Instructions / Service Mode Cont'd / Test Signal Selection

Adjustment of Video Chroma System / CRT Diagram / Text Diagram / AV Diagram / Main Diagram / Main Diagram Cont'd

4. Rotate R350 to show the belt of vertical

retrace. See next figure.

5.Adjust

- / + button to increase the data

value of BRTC, and set it just before the

difference between the belt of vertical retrace

and the border of black portion of inside

pattern is visible. After that, return vertical

height and contrast.

ITEMS:

HORIZONTAL POSITION ADJUSTMENT

(HPOS)

VERTICAL POSITION ADJUSTMENT (VPOS)

ADJUSTMENT PROCEDURE:

1. Set the TV in service mode, and get black or

white cross-bar signal with VIDEO button on

remote hand unit.

2. Select either HPOS (Horizontal picture

phase) or VPOS (Vertical picture phase) with

CHANNEL

tal or vertical picture position in the center of

screen with VOLUME

Signals

H signal (Left, right, white)

H signal (Left, right, black)

Picture

Using method

For checking (of purity drift) of white uniformity

ITEM:

of CRT H signal (Left, right, white).

VERTICAL AMPLITUDE ADJUSTMENT (HIT)

Check in light area.

H signal (Left, right, black).

ADJUSTMENT PROCEDURE:

Check in dark area.

1. Set the TV in service mode, and get black or

white cross-hatch signal with VIDEO button

The adjustment will be the best, if the time when

on remote hand unit.

unevenness of colour in light area occurs, is a

2. Select HIT (Vertical amplitude) with CHAN-

little longer than that in dark area.

NEL

Making approx. 1Vp-p signal in QA01.

amplitude with VOLUME

that vertical amplitude lacks a little.

ITEM:

3. Adjust vertical amplitude with VOLUME

Initialisation of QA02 (Memory)

+ buttons so that the first bar on cross-hatch

signal touches edge of screen.

ADJUSTMENT PROCEDURE:

After replacing QA02, the following initialisation

is required.

1. Call up the adjustment mode display following

the steps 1 and 2.

2. Press the CALL button on the Remote Control

and CHANNEL

buttons on the TV set

simultaneously. The initialisation of QA02 has

been completed.

3. Check the picture carefully. If necessary,

adjust any adjustment item.

Perform "AUTOMATIC SEARCH MEMORY"

ITEM: SUB-BRIGHTNESS (Address: BRTC)

WHITE BALANCE ADJUSTMENT

ADJUSTMENT PROCEDURE:

CUTOFF ADJUSTMENT

1. Set CONTRAST to "00,, and BRIGHTNESS

(RCUT)

to "50" by adjusting user controls.

(GCUT)

2. Set the TV in service mode to get white cross-

(BCUT)

bar of inside pattern.

3. Select BRTC (brightness correction), and

DRIVE ADJUSTMENT

adjust the

- / + button to reduce the value

(GDRV)

so that white portion of inside pattern slightly

(BDRV)

light.

1. Set Contrast to 40, and brightness to +20 by

picture control.

2. Set the TV in service mode, and get the inside

W/B adjusting signal with VIDEO button.

3. Select RCUT, GCUT and BCUT with CHAN-

NEL

buttons, to set individual values to

32, and to set GDRV and BDRV to 20 with

VOLUME

- / + buttons.

4. Press

button on the remote control and

rotate Screen VR to get one slight horizontal

line on screen.

Note:Every pressing of

Horizontal line picture and Normal picture

alternately.

5. Press

button to release horizontal line

picture, and select the two other colours

which did not light in the above step with

CHANNEL

buttons. Then tap VOLUME

- / + buttons so that three colours slightly

light in the same level.

To correct white balance in light area, select

GDRV and BDRV with CHANNEL

to adjust.

To correct white balance in dark area, perform

fine adjustment of RCUT, GCUT and BCUT.

Light area check (to show white)

buttons, and adjust horizon-

- / + buttons.

Dark area check (to show black)

SELF DIAGNOSTIC FUNCTION

1) Press "9" button on Remote Control during

display of adjustment menu. The diagnosis

will begin to check if interface among IC's are

executed properly.

2) During diagnosis, the following displays are

MULTI BUS E2PROM ADDRESS, ADJUSTING ADDRESS TABLE

Adjusting QAO2

method

memory

address

06B

06C

06D

06E

buttons, and adjust vertical

06F

- / + buttons so

070

071

072

- /

073

076

077

078

079

07A

07B

070

07D

082

083

084

086

087

08E

097

098

099

09A

09B

09E

0AF

0B0

0B1

0B2

0B3

0B4

0B5

0B6

0B7

S ... semi-fixed data area which is fixed by model. (Do not adjust in field service.) F ... This item may require

adjustments by models after initialization, when QAO2 is replaced.

shown.

(SELF CHECK)

(1)

23904981

(2)

POWER

(3)

BUS LINE

(4)

Bus CONT

(5)

BLOCK

UV V1 V2

QV01

1) Part number of microcomputer (QA01)

button provides

2) Operation number of protecting circuit ----"00"

is normal. When indication is other than "00",

overcurrent apts to flow, and circuit parts may

possibly be damaged.

3) BUS LINE CHECK ---- "OK" is normal.

"SDA1-GND" means that SDA line is shorted

to ground.

"SCL1-GND" means that SCL line is shorted

to ground.

"SCL1-SDA1" means that SDA line is shorted

to SCL line.

buttons

4) BUS CONT----"OK" is normal.

When indication shows "Q OOO NG", the

device with the number may possibly be

damaged.

5) BLOCK

UV : TV reception mode

V1: VIDEO 1 input mode (

V2 :VIDEO 2 input mode (

Indicated color of mode now selected: Green

and Red

Indicated color of other modes: White

Green: Normal

Red: The microcomputer operates to provide

judgement of no video signal. The red color is

still indicated though the signal is input, failure

may exist in input signal line including QV01.

QV01: In case of indication green --- Normal

In case of indication red with input signal ----

Failure may exist in output line including QV01.

Name

Value of initializing

QAO2

Adjustments

item

(Hexa-decimal)

OSD

OSD POSITION

OPT

OPTION

RCUT

CUT OFF

GCUT

CUT OFF

BCUT

CUT OFF

GDRV

DRIVE

BDRV

DRIVE

CNTX

SUB CONTRAST MAX

BRTC

SUB BRIGHT CEN

COLP

SUB COLOUR CEN PAL

COLS

SUB COLOUR CEN SECAM

CNTC

SUB CONTRAST CEN

CNTN

SUB CONTRAST MIN

BRTX

SUB BRIGHT MAX (DIFFERENCE)

BRTN

SUB BRIGHT MIN (DIFFERENCE)

COLX

SUB COLOUR MAX

COLN

SUB COLOUR MIN

5T4

SUB SHARP CEN OTHER (TV)

5V4

SUB SHARP CEN OTHER (VIDEO)

TXCL

TEXT CONTRAST LEVEL

VM0

VCD MODE DATA

WCTL

APRO MODE DATA

WON

WOOFER AUTO LOUDNESS

EMX

NICAM ON LEVEL

EMN

NICAM OFF LEVEL

FMA

FM ATTENUATOR LEVEL

STS

STEREO SEPARATION

HPOS

50Hz H-POSITION

HPS

60Hz/50Hz H-POSITION (DIFFERENCE)

PID

PAL IDENT LEVEL

TRP

CROMA TRAP f0

DLY0

Y DELAY TV SECAM (BG)

DLY1

Y DELAY TV SECAM (OTHER)

DLY2

Y DELAY VIDEO SECAM

DLY3

Y DELAY TV OTHER (BG)

DLY4

Y DELAY TV OTHER (DK, I)

DLY5

Y DELAY TV OTHER (M,N)

DLY6

Y DELAY TV OTHER (VIDEO)