Page 1
AKAI SERVICE MANUAL
25" / 29"
SOLID STATE
Color Television
Receiver
( P AL / SECAM VERSION )
MITSUBISHI I2C IC
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.
Document : ___________
SM-37PM
Date :
12-11-2001
Approved by :
Checked by :
(Zeng Shui Hua )
Page 2
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 :
SM-37PM P. 1
CRT :
PAL - I / I
4 - 13
21 - 69
38.9
32.9
34.47
6.0
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
6
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 - SECAM -
BG / DK
( HYPER )
1 - 5
6 - 12
21 - 69
38.9
32.4 33.4
34.47 34.47
5.5 6.5
15625 LINE
50 Hz
75 OHM
25" 29"
PAL - BG
( HYPER )
E2 - S10
E5 - S41
E21 - E69
38.9
33.4
34.47
5.5
PAL - BG
( CATV )
E2 - S2
E5 - S20
E21 - E69
38.9
33.4
34.47
5.5
SECAM - L
1 - Q
21 - 69
38.9
32.4
34.47
6.5
L'
FB - FC
32.7
39.2
6.5
CH
CH
CH
MHz
MHz
MHz
MHz
Page 3
ITEMS OF MEASUREMENT
STANDARD
UNIT
VIDEO SENS. AT S/N 30db
L - VHF
H - VHF
UHF
SOUND SENS. AT S/N 30db
L - VHF
H - VHF
UHF
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
< 57
< 57
< 60
< 42
< 42
< 48
> 60
> 35
> 40
< 45
> +300
> 6
> 400
> 100
> 4.5
> 3.5
dbuv
dbuv
dbuv
dbuv
dbuv
dbuv
db
db
db
dbuv
Hz
Hz
Hz
cd/m2
W
W
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 )
< -40
> +1
> -0.5
< 20
> 300
> 400
< 10
< 10
< 5
> 5
> +15
< 120
< 150
< 0.4
< 0.8
db
MHz
MHz
mV
LINES
LINES
%
%
%
METER
DEGREE
WATTS
WATTS
%
%
H
VIDEO INPUT LEVEL : 1.0V P-P + 3dB
AUDIO INPUT LEVEL : 0.5V RMS + 3dB
Fig.1
A
SM-37PM P. 2
B
Page 4
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
5. Volt Ohmmeter
6. High Voltage Meter
7. Ampere Meter ( 0.5 Class, DC 3mA Max )
8. Demagentizing Coil
9. Philips Pattern Generator
10. High Pot Tester
III. FACTORY ADJUSTMENT : See table 1- 4
1. Press REMOTE FACTOR Y ON button.
2. Press REMOTE FACTO RY 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 )
SM-37PM P. 3
Page 5
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% )
VIII. HORIZONT AL 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 )
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.
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.(9300
o
k)
SM-37PM P. 4
Page 6
OV (DC)
2.5V+/-0.25V
(DC)
fig.7
SM-37PM P. 5
Page 7
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.
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.
CONDITION
SAFETY STD.
VDE, SAA
BS
CHINA STANDARD
UL
TEST STANDARD
3.0KV 10mA / 1MIN
4.0KV 10mA / 1MIN
3.0KV 10mA / 1MIN
1.0KV 5mA / 1MIN
TEST ST ANDARD
FOR PRODUCTION
>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
Page 8
DISTRICT
CENTRE (mm)
POSITION
LIMIT (mm)
SCANNING
SIZE (%)
SCANNING
SIZE
LIMIT (%)
THAILAND
FRANCE
GERMANY
*GROUP A
*GROUP B
*GROUP C
mm -5 -4 -3 -2 -1 0 1 2 3 4 5 mm
LEFT RIGHT
-1
+3
+3
-2
0
+3
0 ~ -2
0 ~ +5
0 ~ +5
-5 ~ -1
-2 ~ +2
0 ~ +5
CENTRE OF
THE SCREEN
90
90
90
90
90
90
CRT MUST
FACE TO EAST
88 ~ 92
88 ~ 94
90 ~ 95
88 ~ 94
88 ~ 94
88 ~ 94
FIG. 8
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, ITAL Y, GERMANY , RUSSIA, SWITZERLAND,
JUGOSLAVIA, SPANISH.
If the above countries are not include, please consult to
Engineering Dept.
SM-37PM P. 7
Page 9
FACTORY MODE TABLE 1
REF
ITEM
REMARK
VALUE
O = TV Status
1
2
POWER
TDA884X
P
3
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
3
4
5
6
7
8
9
10
S.SYS
LOGO
CT1
OSD.
ANTENNE
LANGUAGE
WOOFER
TUNE
TEXT
BLUE EX
LANGUAGE
AV NO
1 = DK/I
6
1
0
0
2 = BG/DK
3 = DK/I/M
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
4 = BG/DK/I/M
5 = I
6 = BG
1 = NIL
CHINA
2 = ROWA
3 = CAIXIING
4 = HAIER
0
1 = ON
0 = NO POWER ON AUTO TUNER 1 = POWER ON AUTO TUNER
0
0
1
0 = OFF TEXT 1 = ON TEXT
0 = OFF BLUE EX 1 = ON BLUE EX
0 = ENGLISH ONL Y 1 = CHINESE/ENGLISH
1 = TV/AV1/AV2/AV3/S-VHS
2 = TV/AV1/AV2/S-VHS
3 = TV/AV1/AV2
11
12
13
16:9
KARAOKE
DVDTX Set
BBE
HALF SCR
0 = OFF 16:9
0
0 = OFF KARAOKE
0 = OFF DVD
0 = OFF
1 = ON 16:9
1 = ON KARAOKE
1 = ON DVD
0
1 = ON
0 = Picture
0
1 = HACF Picture
SM-37PM P. 8
Page 10
FACTORY MODE TABLE 2
ITEM
1
H-SHIFT
2
V-SLOPE
3
V-AMPL
4
S-CORRECT10N
5
V-SHIFT
6
EW-WIDTH
VALUE
ADJUST
RANGE
REF
VALUE
REMARK
co-ff dd For CTI ON TV set Adjustment
80-Bf
0-3f
40-80
80-Bf
0-3f
0-3f
a3
2b
55
90
1e
36
For CTI OFF TV set Adjustment
For TV set Adjustment
For TV set Adjustment
For TV set Adjustment
For TV set Adjustment
For TV set Adjustment
7
EW-PAR
8
EW-CORNER
9
EW-TRAP
10
CONTROL 0
11
CONTROL 1
12
AGC
13
PLL
0-3f
0-3f
0-3f
0-3f (TEAC)
40-7f (CHINA)
16
0
2a
3
90
12
40
For TV set Adjustment
For TV set Adjustment
For TV set Adjustment
NON-Adjustable V alue
NON-Adjustable V alue
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
SM-37PM P. 9
Page 11
FACTORY MODE TABLE 3
ITEM
V ALUE
ADJUST
REF
REMARK
VALUE
RANGE
DVD1
1
CONTROL 2
DVD2
0-FF
0-FF
2
CONTROL 3
DVD3
0-FF a3
3
CONTROL 4
4
5
6
HOTEL LOCK
SaB SHP
COMB
00-31
38
18
bb
25"set 12
29"set 14
e9
0
00
1
NON-Adjustable value
NON-Adjustable value
CTI ON Set 9
CTI OFF Set e9
0 = OFF
1 = ON
Sab shp seting
1 = COMB ON
0 = COMB OFF
7
8
NICAM
CCD
1
0
0 = NICAM/G.ST 2 = G.ST
1 = NICAM
0 = OFF CCD
1 = ON CCD
SM-37PM P. 10
Page 12
FACTORY MODE TABLE 4
V ALUE
ITEM
ADJUST
RANGE
1
2
3
4
PT R
PT G
PT B
WHITE BAL
0-3f
0-3f
0-3f
REF
VALUE
22
22
22
0
REMARK
For TV Set Adjustment
For TV Set Adjustment
For TV Set Adjustment
0 = Picture
1 = H-LINE
5
SUB BRI
00-31
18
SUb bri Setting
SM-37PM P. 11
Page 13
LOCATION
T R
B.V
C.V
E.V
Q101
Q102
Q103
Q104
Q105
Q106
Q108
Q109
Q1 10
Q1 11
Q1 13
Q1 14
Q1 15
0.7
4.9
4.9
4.3
3.2
2.4
2.8
1
0.7
7.7
4.3
4.9
0
0
0.3
0.15
4.9
0
7.9
6.7
7
0
0
4.8
4.9
4.9
1.6
4.9
4.9
4.9
3.2
1.7
2.1
0.3
1.4
7.9
4.9
4.6
0
Q1 16
Q1 17
Q1 18
Q1 19
Q301
Q401
Q402
Q403
Q404
Q405
Q701
Q909
Q910
4.8
0.7
0
0.6
2.8
13.6
0.6
0
0.4
21.6
0
-2.35
0
0
0.5
8.1
0
0
13.8
115
76
21
10
293
8.6
4.9
0
0
0
2.82.8
14.3
0
0
0
21
0
0
0
Q911
Q912
Q913
Q914
10.2
8.9
15.3
14.7
0
14
15.3
15.3
1.3
8.2
14.6
15.3
SM-37PM P. 12
Page 14
PIN NO
SYMBOL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
IC101/V
NC
NC
NC
NC
2.6
2.1
4.3
4.3
6.6
1.1
3.7
7.8
3.5
GND
NC
3.9
3.3
6.5
3.1
2.7
2.5
3.6
3.5
3.5
3.5
0.2
2.1
2.1
2.4
2.4
2.4
2.4
4.2
2.5
2.5
4.3
7.9
1.9
4.9
0.3
0.7
4
3.8
GND
0.5
2.4
2.6
4.6
4.6
2.2
3.8
3.8
3.4
4.6
2.9
3.7
IC102/V
0.7
0.7
0
0
4.7
0
0.3
NC
NC
4.5
NC
NC
NC
4.7
NC
4.1
0
GND
2.2
1.8
GND
4.8
3.5
3.5
4.6
NC
NC
NC
4.7
4.7
4.3
4.3
4.7
4.3
NC
NC
4.7
0
0
0
0
0
IC103/V IC104/V
GND
NC
GND
GND
4.8
4.8
4.8
4.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
IC105/V
5
5
5
5
5
5
5
5
GND
GND
GND
GND
GND
5
5
5
GND
GND
GND
5
GND
GND
2.4
GND
2.1
2.5
0
GND
NC
5
2.5
0
0
0
0
0.8
0.8
5
5
GND
2.4
2.7
0
5
GND
GND
GND
GND
4.3
4.3
5
5
IC106/V
GND
GND
GND
GND
5
5
5
5
IC107/V
NC
NC
GND
4.2
4.2
GND
3.9
2.6
0
2.3
2.3
2.3
GND
GND
4.9
4.9
GND
1.9
1.9
NC
NC
NC
NC
NC
NC
NC
NC
GND
2.3
GND
2.3
2.3
NC
NC
GND
NC
NC
4.4
4.4
GND
GND
GND
GND
GND
GND
2.2
2.3
2.3
GND
GND
NC
NC
2.4
2.4
2.4
0
NC
NC
4.8
2.3
2.3
2.4
2.4
4.9
SM-37PM P. 13
Page 15
PIN NO
SYMBOL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
IC108/V
10.5
15.4
10.5
10.4
GND
10.4
21
10.5
10.5
IC109/V IC301/V
1.8
2.1
2.5
1.8
1.8
1.9
1.9
1.8
1.8
3.9
3.9
3
NC
2.8
1.8
2.8
NC
GND
0
0
0
4.8
0.7
GND
2
1.6
1
1.2
GND
4.8
1
4.2
4.2
1
0
0
4.9
1.8
IC401/V
0.7
8.3
1 1.5
15.6
8.1
GND
44
GND
8.4
15.6
1.2
1.2
7
IC402/V
14.6
GND
8
IC403/V
13.7
GND
5
IC404/V
11.8
GND
5
SM-37PM P. 14
Page 16
PIN NO
SYMBOL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
IC501/V
3.2
3.3
3.1
GND
6.4
196
91
82
88
IC01/V IC701/V
7.5
3.8
NC
NC
NC
5.7
5.7
5.7
5.7
5.7
5.7
GND
5.7
5.7
5.7
5.7
10
10
GND
4.2
4.2
10
10
5.7
5.7
NC
5.7
NC
10
4.3
4.5
4.3
4.5
NC
NC
NC
2.9
0
2.9
2.9
2.9
2.9
2.9
2.9
2.9
2.9
0
0
0
0
3
2.9
1.
47
0
0
0
SM-37PM P. 15
Page 17
1
T 402
C.R.T.
F
CN 501
CRT
SOCKET
CRT BOARD
SCREEN
180V
GND
F
F
6
4
3
12
TO C N 1 0 1
TO CN 4 0 4
F.B.T.
1
2
TO CN 501
TO CN 106
³¤¾
25" 29"
L SP EAK ER
¡ ¥ ¡
TO CN 104
AV P CB
TO CN 112
R SPEAKER
¡ ¡
1
3
TO CN 307
AC
INP U T
DEGAU SSING
TO CN 905
CN 101
TO CN 904
±½¹
2
CN 207
1
CN 404
1
1
CN401
4
1
R
CN 107
3
1
L
2
CN 106
3
CN 403
1
TO C N 105
PO W ER
PCB
DEFLECTION YCKE
C N904
C N905
4
1
CN903
TO CN401
3
1
3
1
TO CN 403
9
C N 112
1
MAIN P.C.B
1 6
TO CN 402
4
COIL
TO CN 903
1
2
SM-37PM P. 16
Page 18
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