Akai 25" / 29" SOLID STATE Color Television... Bedienungsanleitung

AKAI SERVICE MANUAL

25" / 29"

SOLID STATE

Color Television

Receiver

This manual is the latest at the time of printing, and does not include the modification

which may be made after the printing, by the constant improvment of product.

Checked by :

Document : ___________

( PAL / SECAM VERSION )

MITSUBISHI I2C IC

Approved by :

Date :

SM-37PM

(Zeng Shui Hua )

12-11-2001

SUPPLY VOLTAGE : AC220V 50Hz > + 10% / -20%

SPECIFICATION

SYSTEM :

CHANNEL L - VHF :

H - VHF :

UHF :

VIF FREQUENCY :

SIF FREQUENCY :

CHROMA IF FREQUENCY :

INTER-CARRIER FREQUENCY :

SCANNING HORIZONTAL :

VERTICAL :

ANTENNA INPUT IMPEDANCE :

CRT :

PAL - BG

2 - 4

5 -12

21 - 69

38.9

33.4

34.47

5.5

PAL - I

(UK)

21 -69

39.5

33.5

35.07

PAL - SECAM -

BG / DK

( HYPER )

1 - 5

6 - 12

21 - 69

38.9

32.4 33.4

34.47 34.47

5.5 6.5

PAL - BG

( CATV )

E2 - S2

E5 - S20

E21 - E69

38.9

33.4

34.47

5.5

PAL - I / I

4 - 13

21 - 69

38.9

32.9

34.47

6.0

PAL - SECAM -

BG / DK

1 - 5

6 - 12

21 - 69

38.0

31.5 32.5

33.57 33.57

6.5 5.5

PAL - BG

( HYPER )

E2 - S10

E5 - S41

E21 - E69

38.9

33.4

34.47

5.5

FB - FC

32.7

39.2

6.5

MHz

15625 LINE

50 Hz

75 OHM

25" 29"

SECAM - L

1 - Q

21 - 69

38.9

32.4

34.47

6.5

SM-37PM P. 1

ITEMS OF MEASUREMENT

VIDEO SENS. AT S/N 30db

SOUND SENS. AT S/N 30db

AGC CHARACTER

SELECTIVITY -1.5 MHz

+ 8 MHz

COLOR SENS.

COLOR LOCK - IN RANGE

VERTICAL LOCK - IN RANGE

HORIZONTAL LOCK - IN RANGE

MAX BRIGHTNESS

MAX OUTPUT POWER

OUTPUT POWER AT 10% THD

BUZZ

AFC RANGE

MIN. VOL HUM

RESOLUTION HORIZONTAL

VERTICAL

LINEARITY DISTORTION VERTICAL

HORIZONTAL

RASTER DISTORTION

REMOTE CONTROL DISTANCE

ANGLE

POWER CONSUMPTION ( AT NORMAL CONDITION )

POWER CONSUMPTION ( AT MAX. CONDITION )

CONVERGENCE DISLOCATION AT AREA "A"

AREA "B"

( see fig.1 )

VIDEO INPUT LEVEL : 1.0V P-P + 3dB

AUDIO INPUT LEVEL : 0.5V RMS + 3dB

L - VHF

H - VHF

UHF

Fig.1

STANDARD

< 57

< 60

< 42

< 48

> 60

> 35

> 40

< 45

> +300

> 6

> 400

> 100

> 4.5

> 3.5

< -40

> +1

> -0.5

< 20

> 300

> 400

< 10

< 5

> 5

> +15

< 120

< 150

< 0.4

< 0.8

UNIT

dbuv

cd/m2

MHz

LINES

METER

DEGREE

WATTS

L - VHF

H - VHF

UHF

SM-37PM P. 2

ALIGNMENT INSTRUCTION

I. PLEASE READ BEFORE ATTEMPTING SERVICE

1. Never disconnect any leads while receiver is in operation.

2. Disconnect all power before attempting any repairs.

3. Do not short any portion of the circuit while power is on.

4. For safety reasons, all parts replaced should be identical, ( for parts and part numbers see parts list ).

5. Before alignment the set must be pre-heated for 30 minutes or more and erase magnetism thoroughly

from CRT front chassis frame by erase coil. ( Except IF, SYNC, COLOR, SECAM, B+, SOUND )

II. TEST EQUIPMENT

1. Colour Bar, Dot, Cross Hatch Generator

2. DC Power Supply

3. Oscilloscope

4. Vacuum Tube Voltmeter

III. FACTORY ADJUSTMENT : See table 1- 4

1. Press REMOTE FACTORY ON button.

2. Press REMOTE FACTORY button.

3. Press REMOTE UP or DOWN button select item.

4. Press REMOTE value (+) (-) button,adjust the value.

5. REMOTE DIALOG CENTRE button can turn off factory mode function.

REMARK : NO this factory on Normal remote control .

IV.B+ ADJUSTMENT

1. Connect a digital voltmeter between the W234 and Ground.

2. Press REMOTE Picture button.

3. Press REMOTE UP/DOWN and value (-) button set Brigntness,contrast,color to minimum.

4. Adjust Screen Volume on FBT Until the picture can just been seen.

5. Adjust VR901 and obtain a reading of 143V +1V (DC).

V.AGC ALIGNMENT

1. Receive CH69 ( UHF ) and input field strength. (60dB in put signal)

2. Connect a digital voltmeter between the TUNER AGC TERMINAL and Ground.

3. Press REMOTE AGC button.

4. Press REMOTE value (+) (-) button adjust value to (0) and then adjust AGC take over value

obtain drop down 0.4V. (DC)

REMARK : ( 1/ The drop down voltage should be more than and tends to 0.4V )

( 2/ No observable noise can be seen )

6. High Voltage Meter

7. Ampere Meter ( 0.5 Class, DC 3mA Max )

8. Demagentizing Coil

9. Philips Pattern Generator

10. High Pot Tester

5. Volt Ohmmeter

SM-37PM P. 3

VIII. HORIZONTAL SHIFT ADJUSTMENT

1. Receive Monoscope Pattern input signal 70dB +10dB.

2. Press REMOTE H-shirt button.

3. Press REMOTE value (+) (-) button adjust value to obtain the picture at center +2mm.

( Specification show in Fig.8 )

VI. SOUND TRACKING ALIGNMENT

1. Receive a gray scale pattern.

2. Connect a oscilloscope and monitor IC109 TDA3857 PIN 15 and Ground.

3. Adjust T101 to obtain the waveform Fig.6.

4. Conect a Voltage meten and monitor IC 104 TDA9801 PIN 15 and gorund.

5. Adjust T101 obtain 5V+0.1V (DC).

Fig.6

Remark: All frequency of Marker points are +0.2% tolerance.

VII. EAST - WEST CORR ECTION ADJUSTMENT

1) Receive a crosshatch and center cross pattem.

2) Set the Brightness,contrast to middle position.

3) Press REMOTE EW-Par/wid,EW-trap button,Press REMOTE VALUE (+) (-) button adjust Value

to normal regular picture.

4) Press REMOTE WE-width button,Press REMOTE value (+) (-) button adjust value to proper horizontal

width ( 90% + 2% )

X. VERTICAL AMPL ADJUSTMENT

1. Receive the Monoscope Pattern.

2. Press REMOTE V-ampl button.

3. Press REMOTE value (+) (-) button adjust value to obtain a normal picture.

XI. WHITE BALANCE ALIGNMENT STEP

( Degauss the picture by degaussing coil if necessary )

1. Receive a grey scale pattern

2. Connect a oscilloscope and monitor CN101 pin"3"and ground.

3. Press REMOTE picture button.

4. Press REMOTE UP/DOWN and value (-) button set the brightness,contrast,

to middle position.

5. Ajust screen volume on FBT unitl the waveform to 2.5V+/-0.25V DC see fig.7.

6. Press REMOTE sub bri button.

7. Press REMOTE value (+) (-) button adjust value to (18).

8. Receive a black and white pattern

9. Press REMOTE with bal button.

10. Press REMOTE UP/Down and value (+) (-) button adjust blue str value to(0).

11. Press REMOTE picture button.

12. Press REMOTE UP/Down and Value(+) (-) button set the brightness and color to minimun position.

contrast to MAX position.

13. Press REMOTE pt r.g.b.button.

14. Press REMOTE UP/Down and value (+) (-) button adjust the white balance.(9300o k)

IX. VERTICAL LINEARTY ADJUSTMENT

1) Receive a crosshatch and center cross pattem.

2) Set the Brightness,contrast to middle position.

3) Press REMOTE V-SIope,S-Correction button,Press REMOTE Value (+) (-) button adjust value to normal

regular picture.

4) Press REMOTE V-Shift button,Press REMOTE Value (+) (-) button adjust value to obtain the picture at center.

SM-37PM P. 4

OV (DC)

2.5V+/-0.25V

(DC)

fig.7

SM-37PM P. 5

XIII.FOCUS ALIGNMENT

1) Set the Brightness and Contrast to middle position.

2) Receive a monoscope pattern.

3) Adjust focus control to obtain sharpest picture.

XIV. HIGH POT TESTING

1) Short the L - pole and N - pole of AC line cord.

2) Switch on the power switch of the TV Set.

3) Connect The High Pot Tester ( - ) to L and N pole, ( + ) to the METAL PART of CABINET.

XII.SUB - BRIGHTNESS ALIGNMENT

1. Receive a grey scale pattern.

2. Press REMOTE picture button,.

3. Press REMOTE UP/DOWN and value (-) button set

the brightness, contrast to minimun.

4. Press REMOTE sub bright button.

5. Press REMOTE value (+) (-) button adjust value to

brightness bar can just be seen.

TEST STANDARD

CONDITION

SAFETY STD. TEST STANDARD

FOR PRODUCTION

VDE, SAA

CHINA STANDARD

3.0KV 10mA / 1MIN

4.0KV 10mA / 1MIN

3.0KV 10mA / 1MIN

1.0KV 5mA / 1MIN

>3.5 KV <10mA / >10 SEC.

>4.0 KV <10mA / >10 SEC.

>3.3 KV < 5mA / > 6 SEC.

>1.25KV < 5mA / > 1 SEC.

Remark:

1) If no other specify, the strength of input signal should be 70dB +10dB.

2) The High Pot Tester can have < +5% tolerance.

SM-37PM P. 6

DISTRICT CENTRE (mm)

POSITION LIMIT (mm) SCANNING

SIZE (%)

SCANNING

SIZE

LIMIT (%)

THAILAND

FRANCE

GERMANY

*GROUP A

*GROUP B

*GROUP C

-1

-2

0 ~ -2

0 ~ +5

-5 ~ -1

-2 ~ +2

0 ~ +5

88 ~ 92

88 ~ 94

90 ~ 95

88 ~ 94

mm -5 -4 -3 -2 -1 0 1 2 3 4 5 mm

LEFT RIGHT

CENTRE OF

THE SCREEN

CRT MUST

FACE TO EAST

REMARK : 1. SUITABLE FOR 14" OR ABOVE TV.

2. Adjust the centre position must take the upper side of monoscope

pattern for standard.

3. Group A : AUSTRALIA, NEW ZEALAND, TAHITI.

4. Group B : HONG KONG, CHINA, AMERICA, CANADA, MALAYSIA,

MEXICO.

5. Group C : ENGLAND, ITALY, GERMANY, RUSSIA, SWITZERLAND,

JUGOSLAVIA, SPANISH.

If the above countries are not include, please consult to

Engineering Dept.

FIG. 8

SM-37PM P. 7

FACTORY MODE TABLE 1

ITEM REF

VALUE REMARK

POWER

TDA884X

S.SYS

LOGO

CT1

WOOFER

AV NO

BBE

HALF SCR

O = TV Status

S = Power Status

P = Last power status

1=PAL/NTSC.W/O EW 3=PAL/NTSC.W/EW

2=PAL/SECAM/NTSC.W/O EW 4=PAL/SECAN/NTSC,W/EW

1 = DK/I

2 = BG/DK

3 = DK/I/M

4 = BG/DK/I/M

5 = I

6 = BG

1 = NIL

TEAC 2 = TEAC

3 = HAIER

0 = OFF

1 = ON

0 = NO BACKGAN 1 = W/BACKGAN

0 = OFF ANTENNE 1 = ON ANTENNE

0 = ENG 1 = RUSSIAN

0 = OFF

1 = ON

0 = OFF BLUE EX 1 = ON BLUE EX

0 = ENGLISH ONLY 1 = CHINESE/ENGLISH

0 = OFF

1 = ON

0 = OFF KARAOKE

0 = OFF DVD

0 = Picture

1 = HACF Picture

0=NO POWER ON AUTO TUNER 1=POWERONAUTOTUNER

0 = OFF TEXT 1 = ON TEXT

1 = TV/AV1/AV2/AV3/S-VHS

2 = TV/AV1/AV2/S-VHS

3 = TV/AV1/AV2

OSD.

ANTENNE

LANGUAGE

TUNE

TEXT

BLUE EX

LANGUAGE

16:9

KARAOKE

DVDTX Set 1 = ON KARAOKE

1 = ON DVD

0 = OFF 16:9 1 = ON 16:9

1 = NIL

2 = ROWA

3 = CAIXIING

4 = HAIER

CHINA

SM-37PM P. 8

FACTORY MODE TABLE 2

ITEM REF

VALUE REMARK

H-SHIFT

V-SLOPE

V-AMPL

S-CORRECT10N

V-SHIFT

EW-WIDTH

EW-PAR

EW-CORNER

EW-TRAP

CONTROL 0

CONTROL 1

AGC

PLL

ADJUST

RANGE

80-Bf

0-3f

40-80

80-Bf

0-3f

VALUE

ForCTIOFFTVsetAdjustment

For TV set Adjustment

NON-AdjustableValue

For TV set Adjustment

For TV Set IF Frequency

40 = 38.90 MHz 80 = 33.40 MHz

60 = 38.00 MHz CI = 33.90 MHz

co-ff dd For CTI ON TV set Adjustment

0-3f (TEAC)

40-7f (CHINA)

SM-37PM P. 9

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