Roadstar CTV-1450 User manual

Service Manual - CTV-1450_2050
Service Manual - CTV-1450_2050
R
CTV-1450_2050

110VDC
28V
13V
8V
5V
SMPS
Micro Processor (UOC IC )
TDA 9351
FBT
Audio Processor
TDA 9859
Tuner
Vertical output
STV 9302A
Video Amplifier CRT
Audio Output
AN17821
Key IR
SCART
SWITCH IC
HEF4052BP
FRONT
AV
Memory
AT24C16
Horizontal
O/P TR.
Horizontal
O/P driver
SpeakerBLOCK DIAGRAM
4
5

modello: 1450KT
pagina: 1 / 2
data: 09-nov-2005
revisione: 08
n.° livello quant.
x TV
un. di
misura prov. n.° disegno
codice
componente
111) Assieme televisore finito 1 n.°
22 2) Assieme cabinet frontale 1 n.° 1200004770
3 3 3) cabinet frontale verniciato con scritte 1 n.° LOCAL 1600005000
4 4 4) cabinet frontale non verniciato 1 n.° LOCAL 1200004919
55 5) plastica grezza 825,00 gLOCAL 1500001000
64 4) vernice 62,70 gLOCAL 1500002000
74 4) inchiostro per scritte 0,03 g LOCAL 1500003000
8 4 4) staffa fissaggio cabinet destra 1 n.° FA 1200001752
9 4 4) staffa fissaggio cabinet sinistra 1 n.° FA 1200001751
10 4 4) collante per staffe 0,020 g FA/LOC 1600008000
11 5 5) graniglia per collante 0,002 g FA/LOC 1600008001
12 5 5) solvente 0,018 g FA/LOC 1600008002
13 3 3) pulsante accensione verniciato 1 n.° LOCAL 1600006000
14 4 4) pulsante accensione non verniciato 1 n.° FA 1200002010
15 5 5) plastica grezza x g LOCAL 1500001000
16 4 4) vernice x g LOCAL 1500002000
17 3 3) molla pulsante accensione 1 n.° FA 1100001810
18 3 3) pulsantiera verniciata (5 p.) 1 n.° LOCAL 1600007000
19 4 4) pulsantiera non verniciata 1 n.° FA 1200004935
20 5 5) plastica grezza xg
LOCAL 1500001000
21 4 4) vernice x g LOCAL 1500002000
22 3 3) vite per fissaggio pulsantiera, 4x12BT 2 n.° FA/LOC 1100001767
23 3 3) logo ROADSTAR CTV 1450-K
T
1 n.° FA 1100009120
24 3 3) coperchio ricevitore IR 1 n.° FA 1200001478
25 3 3) lente per led e ricevitore IR 1 n.° FA 1200001725
26 3 3) rondella cinescopio in gomma, 6x22x3mm 4 n.° FA/LOC 1100001920
27 3 3) colla per rondelle 0,5 g FA/LOC 1400000138
28 3 3) cinescopio 14", generico, yammato 1 n.° vedi tab. vedi tabella p. 2 vedi tabella
29 3 3) vite per fissaggio cinescopio, 5x20 tipo B 4 n.° FA/LOC 1100001753
30 3 3) cavo di massa per cinescopio 1 n.° SKD JE1----B012-A 1100001506
31 3 3) molla con gancio per tensione cavo di massa 1 n.° LOCAL ES14AMP01 1500005001
32 3 3) bobina di smagnetizzazione 1 n.° SKD 1100009192
33 3 3) fascetta in plastica, 2.5x100 mm, bianca 4 n.° FA/LOC MG3X0020---G7 1100001860
34 3 3) sostegni per bobina smagnet.- filo gommato 4 n.° SKD MB5X0005---E3 1600002000
35 3 3) cablaggio giogo, 400 mm 1 n.° SKD JS4401-A001-P 1100001480
36 3 3) staffa altoparlante sinistro 1 n.° FA 1200001403
37 3 3) altoparlante, 16Ω, 3W, Φ90mm 1 n.° SKD 1100008482
38 3 3) guarnizione altoparlante 1 n.° FA 1100003355
39 3 3) connettore altoparlante 1 n.° SKD JW2321-C001-A 1600004000
descrizione componenti
Elenco dei Materiali (B.o.M.)
TV 14" - Roadstar
Ricerca & Innovazione

40 3 3) vite per fissaggio altoparlante, 4x12BT 2 n.° FA/LOC 1100001767
41 3 3) nastro in feltro 25mm per bordo altoparlante 0,04 m FA/LOC 1100001853
42 3 3) cravatta ferma cavo in metallo, 57 mm 1 n.° FA/LOC 1100001858
43 3 3) assieme chassis 14" 1 n.° SKD vedi tabella p. 2 vedi tabella
44 3 3) cappuccio per pulsante accensione 1 n.° FA 1200000687
45 3 3) cavo di alimentazione 220 V 1 n.° SKD JP2202-V004-X 1100009704
46 3 3) filo gommato nero per cavo alim., 100 mm 1 n.° FA 1100001861
47 3 3) ferma cavo per cavo alimentazione 1 n.° FA 1200000758
48 3 3) distanziatore cavo ventosa HV 2 n.° FA MG3X0040---G2 1100003293
49 3 3) fascetta in plastica, 2.5x100 mm, bianca 4 n.° FA/LOC 1100001860

modello: 1450KT
pagina: 2 / 2
data: 09-nov-2005
revisione: 08
n.° livello quant.
x TV
un. di
misura
n.°
disegno
codice
componente
50 2 2) Assieme cabinet posteriore 1 n.° 1200004764
51 3 3) cabinet posteriore non verniciato 1 n.° LOCAL 1200004800
52 4 4) plastica grezza 1.181,0 gLOCAL 1600001001
53 3 3) nastro in feltro 25mm 0,6 m FA/LOC 1100001853
54 3 3) etichetta articolo e codice a barre 80x65mm 1 n.° LOCAL 1500008001
55 3 3) vite per assiemaggio cabinet, 4x16BT 4 n.° FA/LOC 1100004229
56 Busta accessori 1 n.°
57 3 3) libretto istruzioni 1 n.° LOCAL 1100009248
58 3 3) scheda di garanzia Roadstar 1 n.° LOCAL 1100010179
59 3 3) schema circuito elettrico CTV 1450KT, VE02 1 n.° LOCAL 1100010167
60 3 3) lista Centri Assistenza Tecnica 1 n.° LOCAL 1100010185
61 3 3) etichetta PVC per schermo (POP) 1 n.° LOCAL 1100009659
62 3 3) telecomando 1 n.° SKD BT-0369A---CB 1100009207
63 3 3) batterie per telecomando 1,5 V, UM3, AA 2 n.° SKD MT0X0008---T3 1100002593
64 3 3) busta polietilene 235x330 mm 1 n.° LOCAL 1300000385
65 11) Scatola imballo TV 1 n.°
66 3 3) scatola imballo piana 1 n.° LOCAL 1300001358
67 3 3) busta TV polietilene, 850x800 mm 1 n.° LOCAL 1300000388
68 3 3) polistirolo per imballo inferiore (dx e sx) 1 n.° LOCAL 1300000720 B
69 3 3) polistirolo per imballo superiore (dx e sx) 1 n.° LOCAL 1300000720 T
70 3 3) etichetta articolo e codice a barre, 57x18 mm 3 n.° FA 1100001815
71 3 3) nastro adesivo trasparente 72 mm 4,5 m FA/LOC 1300000769
72 Materiali di supporto alla lavorazione
73 3 3) nastro in carta 12 mm 0,1 m FA/LOC 1400000151
74 3 3) cartellino di lavorazione "history card" 1 n.° FA/LOC 1100001770
75 3 3) stagno per saldature 2 g FA/LOC 1400000301
n.° livello quant.
x imb.
un. di
misura prov. n.° disegno / specifica
codice
componente
111) Assieme imballo
2 2 2) televisore imballato 20 n.°
3 2 2) film polietilene estensibile 30 m LOCAL 1600009001
Legenda provenienza: FA = India; SKD = Cina; LOCAL = locale; FA/LOC = India o locale
descrizione componenti imballo
descrizione componenti
Elenco dei Materiali (B.o.M.)
TV 14" - Roadstar
Ricerca & Innovazione

n°. Provenienza Codice compon.
1 SKD 1200004804
2 SKD 1700002003
3 SKD 1700002004
4
5
Tipo Cinescopi
o
Provenienza Codice componente Tipo Chassis
A
34LEX10
X
SAMTEL - India 1100001679 VE02 14SMT
A
34KQW42X01 SAMSUNG SDI - Malaysia 1700001001 VE02 14SMG
A
33EKC..X.. EKRANAS - Lithuania 1700001002 VE02 14EK
R

!
!
+ + +
+
123
+
123
+
+
+
AVL/REFO32 H OUT
TUNER AGC
AUDEEM
/SIF2
GND2
DECSDEM
/SIF1
/SIF AGC
SNDPLL
31
30
28
29
27
FBISO
/QSSO
AUDEXT
PLL IF
EHTO
/SVO
IFVO
33
34
35
37
36
38
IF1
VDRA
IF2
IREF
VSC
26
25
23
24
22
Vp1
CVBSINT
CVBS/Y
GND1
CHROMA
GND3
PHL1LF
DECBG
/EWD
AVL
VDRB
21
20
18
19
17
AUDOUT
/AMOUT
INSSW2
G2/YIN
R2/VIN
B2/UIN
39
40
42
41
43
44
45
47
46
48
58
7 VOL1 XTAL IN
BOUT
12 Vss A
SECPLL
Vp2
DECDIG
PHL2LF
16
15
14
13
BCLIN
BLANKING
ROUT
GOUT
MUTE
BAND1
Vss C/P
BAND2
11
10
9
8
VddA
VpE
VddC
OSCGND
53
49
50
51
52
54
55
56
57
AV22 SCL
NTSC SW
SDA
/AC TEST
TUNING
KEY
6
5
4
3
XTAL OUT
RESET
VddP
AV1
STAND BY
1IRIN
63
59
60
61
62
64
4
3
1
2
5
SDA
6
SCL
8
7
1
2
4
3
5
+ +
4
3
2
1
INV IN
VCC
PUMP UP
VEE
7
6
5
V OUT
VCC2
NON-INV IN
+
+
+
+
+
+
+
+
+
R GND
BL GND
BLANK IN
Vo GND
Vi GND
SHIELD
18
21
19
Vo
Vi/Y 20
15
17
16
13
R IN
14
12
B GND
A GND
B IN/OUT
G GND
ALi1
9
11
G IN
10
7
SW
6
8
ALo
5
3
4
ARi1
ARo 1
2
+
+
+
+
+
+
+
+
+
Y0A
VEE
VSS
INH
6
8
7
Y3B
Y1B
ZB
3
5
4
Y0B
Y2B
2
1
11
Y3A
A1
A0
9
10
14
12
13
ZA
Y1A
15
16
Y2A
VDD
+
+
+
+
+
!t
CH1out(-) GND(CH1out) CH1out(+) Vcc
1234
GND(CH2out) CH2 OUT(-)
VOLUME
CH2 IN GND CH1in STAND-BY
567810
911
CH2 OUT(+)
12
+
+
+
+
+
3
1
10
4
7
5
3
6
8
FO
SC
HV
H
V
+
+
+
+
+
+
+
MAIN PCB
+
+
6GND
R
G
B
5
3
4
IK
XS903
1
2
GND
+
200V
CRT GND
HEATER
GND
1
XS902
1
HV
SC
FO
+
N611
KA5Q0765
C615
1000/1KV
C616
680p/2KV
C617
33u
R617
2.4K
SW601
A04
T3.15AL/AC 250V
F601
C601
0.22u/AC275V
R601
220K
L601
LF-033
R602 1.8
C607A
470p/AC 400V
C611
2200p/1KV
C618
0.1u
C619
0.033u
C614
470p
C620
1000p/AC400V
VD611
TVR4J
R611
68K
R612
68K
C610
220u/400V
N612
PC817B/C
VD613
RGP10J
VD614
RGP10J
VD615
1N4148
R615
2.2
R616
3.3K
R619
24M
T611
0087
L911
LM-01
VD646
RGP15D
VD651
RGP10D
VD666
RGP15D
VD631
RGP10J
VD641
RGP10D
C646
470p/1KV
C651
470p/1KV
C666 470p/1KV
C631
470p/2KV
C641
470p/1KV
+13V
B+ +110V
C647
2200u/25V
C652
2200u/25V
C667
1000u/16V
R652
220
C632
220u/160V
R632
51K
R633
51K
VR631
20K
R634
2.4K
R636
10K
R635
1K
C633
0.033u
VD632
1N4148 VD652
1N4148
V631
TL431LP
R653
12K
V701
2SC1815
C701
0.01u
KA7805
N656
C656
470u/16V
+5V
R667
10K
R668
1.2K
VD667
1N4148
V666
2SB1443
KA7808
N671
R671
56
+8V
R702
10K
C671
470u/16V
+26V
C642
100u/35V
VD661
HZ3C2
+3.3V
C661
100u/16V
V702
2SC1815
V703
2SC1815
R706
22K
R703
22K
R707
1K
R704
1K
VD701
R705
330
R708
330
TDA9361
N301
R733 3.3K
R701 3.3K R710 3.3K
R712 3.3K
R709
100
R711
100
N701
AT24C16
+3.3V
+5V
R723
47
R724
10K
R726
12K
R727
2.7K
R728
2K
R729
1.2K
P+
SW705
P-
SW704
V+
SW703
V-
SW702
MENU
SW701
R731
3.3K
R221
1.5k
R224
1.2K
R223
4.7K
R226
220
R227
220
R229
33
C221
1000p
C225
0.01u
C223
0.01u
V221
2SC1674C
+9V
R737 220
R740 220
C202 0.01u
R202
3.3K
R203
47K
R204
270
R201
22
+8V
VD201
MTZJ5C1
C301
0.22u
C304
0.22u
C305
2200p
C306
4700p
C303
0.01u
C302
47u/16V
C307
1u
L301 10uH
+8V
R301 15K
C308
0.1u
C309
2.2u
C401
1000p
C402
1000p
R401 100
R402 100
Z221
K2955
R403
39K
C403
0.1u
C207
0.022u
C311
3300p
C313
820p
C314
4700p
C312
10u/16V
C315
4.7u
R302
2.7K
N411
LA78040
R412
1.5K
R404
1.5K
C412
0.033u
VD411
RGP10D
C411
180p
+15V
C414
100u/35V
-15V
VD412
MTZJ18
C415
0.22u
R413
1
R414
100
C416
0.1u/100V
L411
22uH
R743
100
R742
3.3K
R741
3.3K
0038A2
N703
L703
10uH
C719
0.01u
C718
2.2u
+3.3V
L702
10uH
C715
0.01u
C714
10u/16V +3.3V
X701
12M
C716
33p
C717
33p
C713
0.01u C712
10u/16V
L701
10uH
+3.3V
R373
330
R372
330
R371
330
R361
10K
+8V
R363
22K
R362
33K
C361
560p
C353
0.022u
C352
0.022u
C351
0.022u
C317
10u/16V
R304
1K
C336
0.1u
R331
1.8K R334
100
R333
220
R555
100K
R303
390
R556
27K
R501
2.2K
C332
0.01u
C331
100u/16V
L331
10uH
+8V
V331
2SC1815 V332
2SC1815
L332
8.2uH
Z331
XT5.5M
Z332
XT6.5M
Z333
XT6.0M
C333
47u/16V
C335
10u/16V
R339
110
R340
100
R338
330
C334
10u/16V
C316
0.1u
C551
1000p
R563
27K
VD561
MTZJ8C2
XS801
R821
3.9K
R822
10K
C821
470p
C822
1u
C846
470p
C847
1u
R847
100K
R846
1K
C831
470p
C832
1u
R832
10K
R831
3.9K
C841
470p
C842
1u
R842
100K
R841
1K
R853
75
R852
75
R851
75
VD853
MTZJ8C2
VD852
MTZJ8C2
VD871
MTZJ8C2
VD851
MTZJ8C2
C811
470u/16V
R811
68
C801
470p
R801
100
C802
47u/16V
R806
100
C807
47u/16V
C806
470P
R826
3.9K
C827
1u
C826
470p
R827
10K
R836
3.9K
R837
10K
C836
470p
C837
1u
BU4052
N101
C101
47u/16V
+8V
R102
10K
R103
10K
N111
TDA9859
C112
100u16V
C111
0.47u
C113
0.47u
C115
0.01u
C114
47u/16V
L111
10uH
+8V
C116
0.068u
C117
0.15u
R111
12K
C118
6800p
R112
12K
R113
100
R115
12K
R114
100
C121
6800p
R116
12K
C123
0.068u
C122
0.15u
C125
0.015u
C126
0.015u
C861
1000p
R854
75
V811
2SC1815
R812
33
R814
5.6K
C812
47u/16V
R813
150
+8V
P10X180M
PS601
N151
AN17821
C152
0.01u
C151
2200u/25V
+13V
C191
1u
R153
1.8K
C154
1u
C155
6800p
C156
1u
C157
6800p R155
1.8K
V142
2SC1815
VD141
1N4148
R141
10K
C141
100u/16V
+8V
R142
10K
V141
2SA1015
R734
10K
R143
22K
+8V
T511
0083
R571
1K
R572
10K
R573
4.7K
R575
1.8K
C571
0.1u C572
0.47u
C573
10u/16V
VD573
1N4148
VD572
1N4148
VD571
MTZJ8C2
+8V
+110V
R514
3.9
C515
10u/160V
R554
560K
R553
680
R552
1K
VD552
1N4148 VD551
MTZJ22D
2SD1651C
V511
XS511
DY
LF-05
L512
LF-05
L511
C512
680p/2KV
C511
9100p/1.6KV
C531
470p/500V
VD531
RGP10D
VD541
GRP10J
C541
470p/500V
R511 1K
L513
016
T501
C503
47u/35V
C536
470u/25V
C502
1000p/500V
C501
3900p/500V
R536
1W 1
R504
270
VD536
RGP10D
R503
1K
V501
2SC2383
+26V
-15V
+15V
C532
470u/25V
+180V
C513
0.36u/200V
R513
2.7
R512
10K
VD511
BAV21
C514
4.7u/160V
+180V
C542
10u/250V
R502
100
R562
100
C561
100p/500V
R561
10K
R531
1W 1
LF-05
L611
VD616
5V1HSC
R641
1/2W 0.47
R646
1/2W 0.47
R651
1/2W 0.47 R661
33
R666
1/2W 0.47
C702
47u/16V
C703
0.01u
VD702
1N4148
C310
4.7u
L402 1uH
L401 1uH
VD401
MTZJ8C2
VD402
MTZJ8C2
R815
5.6K
VD801
MTZJ8C2
VD806
MTZJ8C2
VD846
MTZJ5C1
VD831
MTZJ5C1
VD821
MTZJ5C1
VD841
MTZJ5C1
VD826
MTZJ5C1
VD836
MTZJ5C1
VD854
MTZJ8C2
R117
100
R118
100
R871
5.6K
C853
470p
C852
470p
C851
470p
R156
68K
C160
10u/16V
R157
270K
R722
3.9K
C201
47u/16V
C206
3.3u
VILEUR UOC STEREO SCH
R411
1
VD604
TVR4J
VD603
TVR4J
C603
1000/1KV
VD605
TVR4J
C605
1000/1KV
VD606
TVR4J
L602
LF-033
+5V
C710
0.1u
+3.3V
R191
2.2K
R192
8.2K
C153
1u
C574
10u/16V
R633A
1.5K
L101
10uH
L333
10uH
VALUE
NAME
+B
R718
8.5K
N702
KA33
C706
10u/50V
L221
0.75uH
VD619
HZ9A3
R917
220
R927
220
R937
220
V921
2SC2330
R932
10K
R921
47
R931
47
R911
47
R934
47
VD931
1N4148
R922
10K
R936
330
C921
220
R924
47
C931
220
V931
2SC2330
R933
300
R935
10K
R923
300
VD921
1N4148
V933
BF420
V932
BF421
R926
330
V923
BF421
VD941
MTZJ8.2
C911
220
R914
47
R913
300
R912
10K
R925
10K
VD911
1N4148
V911
2SC2330
R915
10K
V913
BF421
R916
330
V922
BF420
V912
BF420
XS905
SOCKET
C941
10u/250V
R951
J
R941
5.6 C955
10u/250V
VD955
RGP10J
R955
2.2M
C943
1000/2KV
R928
1.5K
R938
1.5K
R918
1.5K L912
82uH
L913
82uH
R OUT
L911 82uH B OUT
G OUT
VE901
A51JSY61X03
52
1
1
2
5
1
2
1
1
1
2
2
1
XS602
XS601XP601
!
!
!
!
!
!
!!
!
!
TP91
B+ ADJ
K
R
ASTANDBY
H:ON L:OFF
TPAGC
1
2
3
4
5
6
XS371
B
IK
GND
G
R
GND
3
4
2
1
!
!
!
1
2
3
4
5
XS551
1
2
2
3
XS151
1
XS152
!
1
2
XS701
XP2001
FROM XS701
1 2
TO XP2001
FROM XS231
1
2
3
4
5
6
7
8
TO XP2101
XS807
3
4
5
XS156
TO XP2102
1
2
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
! !
SP101
SP102
!
AGC
AS
SDA
SCL
BP+5V
IF
BT+31V
2
2
2
CRT°å
2
15
34
+
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12
3
4
8 11
13
7
12
3
14
10
15
116
+
+ +
P2P1
2 31
AUDIO
OUT L
WOOF
OUT L
MAIN
OUT L
CBL2
CBL1
CPS2
CPS1
AV2 R
AV2 L
OUT R
14
16
15 OUT R
SCL
CTR
MAIN
11
10
13
12
WOOF
CBR2
CBR1
VI8
7
6
9
8
VO2
GND
AUDIO
OUT R
VCC
3
5
4CSMO
MAIN R
MAIN L
18
17
SDA
19
CTL
21
20
23
22
VI7
25
24
VO1
GND
27
26
29
28
30
AV1 R
1AV1 L 32
+
+
+
+
+
+
+

1
COLOR TELEVISION
SERVICE MANUAL
CHASSIS: - VE01
MODEL NO: - 1450KT, 2050KT, 2150KT

2
CONTENTS
Safety Precautions------------------------------------------------------------------------ 3
Introduction----------------------------------------------------------------------------------- 3
1. SCART details------------------------------------------------------------------------------ 4
2. Micro-Controller and Small Signal function ÆTDA9351.------------------------ 5-8
3. Tuner------------------------------------------------------------------------------------------ 9
4. Video SwitchÆHEF4052BP------------------------------------------------------------ 10
5. Sound Processor -ÆTDA9859--------------------------------------------------------- 10
6. Sound Output -ÆAN17821-------------------------------------------------------------- 10
7. Vertical Output Stage ÆSTV9302A-------------------------------------------------- 10
8. Video Output Amplifier ------------------------------------------------------------------- 11
9. Power Supply------------------------------------------------------------------------------- 11
10. Memory IC ÆAT24C16---------------------------------------------------------------- 11
11. IC Description with Pin Details----------------------------------------------------- 12
11A. TDA9351------------------------------------------------------------------------- 12-18
11B. HEF4052BP--------------------------------------------------------------------- 18-19
11C. STV9302A----------------------------------------------------------------------- 19-20
11D. IC AT24C16--------------------------------------------------------------------- 20-21
11E. TDA9859------------------------------------------------------------------------- 21-23
11F. AN17821-------------------------------------------------------------------------- 24
11G.STR5Q0765----------------------------------------------------------------------- 24-25
11H. Video Amplifier Transistors--------------------------------------------------- 25-26
12. Alignment Procedures------------------------------------------------------------------ 26
12.A. Procedure to enter Service Mode------------------------------------------ 26
12.B. Procedure to enter Design Mode------------------------------------------- 26
12.C. White Balance Adjustment--------------------------------------------------- 27
12.D. Screen Adjustment------------------------------------------------------------- 27
12.E. Design and Service data adjustment-------------------------------------- 27-31
12.F. Manufacturing and alignment procedures-------------------------------- 32-42
13. Block Diagram-------------------------------------------------------------------------- 43
14. Circuit Diagram------------------------------------------------------------------------- 44
15. Track Side Layout--------------------------------------------------------------------- 45

3
SAFETY PRECAUTIONS
•Do not change any module unless the set is switched off.
•The mains supply side of the SMPS transformer is live. Use an isolating transformer
•Servicing of the CTV set should only be carried out by qualified person.
•Components marked with warning symbol on circuit diagram are critical for safety and
must only be replaced with an identical component
•Power resistor and fusable resistors must be mounted in an identical manner to the
original component.
•Discharge the capacitors like Main Filter when working on these.
•Do not solder when the set is on.
•Do not connect any external device like Speakers etc. when the set is on.
•When any signals are to be connected/ disconnected switch off the set.
•Wear rubber shoes/non-conducting so that your body does not become a passage for
electric current.
INTRODUCTION:-
VE01 chassis is capable of driving 14”, 20”, 21”, 21”PF tubes at appropriate currents. This
chassis is capable of working in the PAL / SECAM / NTSC systems. The sound system is
capable of giving 1.5W r.m.s. output into a load 8E speaker. One page simple TELETEXT,
TOPTEXT and FASTEXT is provided. The chassis is equipped with 21 pin scart connector which
can accept via scart the SVHS format from VCRs.
The details of various sections with IC details and pin voltages are covered in this manual. The
alignment procedure in field and also at manufacturing line is also covered in detail. The block
diagram, circuit diagram and track side layout of VE01 chassis is also attached in this manual for
easy reference.

4
1. PERI- TV SOCKET (SCART)
PIN DETAILS OF SCART
Pin Name Description Signal Level Impedance
1 AOR Audio Out Right 0.5 V rms <1k ohm
2 AIR Audio In Right 0.5 V rms >10k ohm
3 AOL Audio Out Left + Mono 0.5 V rms <1k ohm
4 AGND Audio Ground
5 B GND RGB Blue Ground
6 AIL Audio In Left + Mono 0.5 V rms >10k ohm
7 B RGB Blue In 0.7 V 75 ohm
8 SWTCH Audio/RGB switch / 16:9 0-2 V=TV, 5-8 V=WideScreen, 9.5-12
V=AV Mode >10 kohm
9 G GND RGB Green Ground
10 CLKOUT Data 2: Clockpulse Out Unavailable
11 G RGB Green In 0.7 V 75 ohm
12 DATA Data 1: Data Out Unavailable
13 R GND RGB Red Ground
14 DATAGND Data Ground
15 R RGB Red In /
Chrominance 0.7 V (Chroma.: 0.3 V burst) 75 ohm
16 BLNK Blanking Signal 1-3 V=RGB, 0-0.4 V=Composite 75 ohm
17 VGND Composite Video Ground
18 BLNKGND Blanking Signal Ground
19 VOUT Composite Video Out 1 V 75 ohm
20 VIN Composite Video In /
Luminance 1 V 75 ohm
21 SHIELD Ground/Shield (Chassis)

5
2. MICRO CONTROLLER AND SMALL SIGNAL FUNCTION WITH TDA 9351:- This IC is a
combination of microcontroller and chroma (Small Signal function). This IC performs all important
functions in TV receiver. The details of IC are bifurcated in two parts. Small Signal function and
microcontroller
2A:- SMALL SIGNAL FUNCTION:
2A.1: VISION IF AMPLIFIER: The vision IF amplifier can demodulate signals with positive and
negative modulation. The PLL demodulator is completely alignment-free. The VCO of the PLL
circuit is internal, and the frequency is fixed to the required value by using the clock frequency
of the Controller/ Teletext decoder as a reference. The setting of the various frequencies (38,
38.9, 45.75 and 58.75 MHz) can be made via the control bits IFA-IFC in sub address 27H.
Because of the internal VCO, the IF circuit has a high immunity to EMC interferences.
2A.2: VIDEO SWITCHES: The video switch has one input for an external CVBS or Y/C signal.
The selected CVBS signal can be supplied to pin 38, the IF video output. The selection
between both signals is realized by means of the SVO bit in sub address 22H. The video ident
circuit can be connected to the incoming ‘internal’ video signal or to the selected signal. This
ident circuit is independent of the synchronisation and can be used to switch the time-constant
of the horizontal PLL depending on the presence of a video signal (via the VID bit). Because of
the availability of the Y/C input and the subcarrier output an external comb-filter can be applied.
In that case an external video switch (or comb-filter with integrated switch) must be used. The
subcarrier output is combined with a 3-level output switch (0 V, 4 V and 8 V). The output level
and the availability of the subcarrier signal is controlled by the CMB1 and CMB0 bits. The
output can be used to switch sound traps etc.
2A.3: SOUND CIRCUIT (QSS VERSION)
The sound IF amplifier is similar to the vision IF amplifier and has an external AGC decoupling
capacitor. The single reference QSS mixer is realised by a multiplier. In this multiplier the SIF
signal is converted to the intercarrier frequency by mixing it with the regenerated picture carrier
from the VCO. The mixer output signal is supplied to the output via a high-pass filter for

6
attenuation of the residual video signals. With this system a high performance hi-fi stereo
sound processing can be achieved. The AM sound demodulator is realised by a multiplier. The
modulated sound IF signal is multiplied in phase with the limited SIF signal. The demodulator
output signal is supplied to the output via a low-pass filter for attenuation of the carrier
harmonics. The AM signal is supplied to the output (pin 44) via the volume control. It is possible
to get the AM output signal (not controlled on amplitude) on the QSS intercarrier output. The
selection is made by means of the AM bit in subaddress 29H. Another possibility is that pin 35
is transferred to external audio input pin and pin 32 to (non-controlled) AM output pin. This can
be realised by means of the setting the control bits CMB0 and CMB1 in subaddress 22H.
2A.4: FM DEMODULATOR AND AUDIO AMPLIFIER (MONO VERSIONS):- The FM
demodulator is realised as narrow-band PLL with external loop filter, which provides the
necessary selectivity without using an external band-pass filter. To obtain a good selectivity a
linear phase detector and constant input signal amplitude are required. For this reason the
intercarrier signal is internally supplied to the demodulator via a gain controlled amplifier and
AGC circuit. The nominal frequency of the demodulator is tuned to the required frequency
(4.5/5.5/6.0/6.5 MHz) by means of a calibration circuit which uses the clock frequency of the
Controller/Teletext decoder as a reference. The setting to the wanted frequency is realised by
means of the control bits FMA and FMB in control byte 29H. When required an external sound
band-pass filter can be inserted in front of the narrow-band PLL. In that case pin 32 has to be
switched to sound IF input by means of the bits SIF (subaddress 21H) and CMB0/CMB1
(subaddress 22H). When the sound IF input is selected the subcarrier output or AVL function
are not available. From the output status bytes it can be read whether the PLL frequency is
inside or outside the window and whether the PLL is in lock or not. With this information it is
possible to make an automatic search system for the incoming sound frequency. This can be
realised by means of a software loop which switches the demodulator to the various
frequencies and then select the frequency on which a lock condition has been found. The
deemphasis output signal amplitude is independent of the TV standard and has the same value
for a frequency deviation of 25 kHz at the 4.5 MHz standard and for a deviation of 50 Khz for
the other standards. The audio control circuit contains an audio switch and volume control. In
the mono intercarrier sound versions, the Automatic Volume Levelling (AVL) function can be
activated. The pin to which the external capacitor has to be connected depends on the IC
version. For the 90 degree types the capacitor is connected to the EW output pin (pin 20). For

7
the 110 degree types a choice must be made between the AVL function and a sub-carrier
output for comb filter applications. This choice is made via the CBM0 and CMB1bits (in
subaddress 22H). When the AVL is active it automatically stabilises the audio output signal to a
certain level. The signal on the deemphasis pin (28) can be supplied to the SCART connector
via a buffer stage. It is also possible to use this pin as additional audio input. In that case the
internal signal must, of course, be switched off. This can be realised by means of the sound
mute bit (SM in subaddress 29H). When the IF circuit is switched to positive modulation the
internal signal on the deemphasis pin is automatically muted. The audio switch is controlled by
means of the INA/INB bits in subaddress 22H. It is, however, also possible to overrule the
audio switch position by means of the ADS and ADX bits (subaddresses 28H and 21H
respectively).
2A.5: SYNCHRONISATION CIRCUIT :- The IC contains separator circuits for the horizontal
and vertical sync pulses and a data-slicing circuit which extracts the digital teletext data from
the analog signal. The horizontal drive signal is obtained from an internal VCO which is running
at a frequency of 25 MHz. This oscillator is stabilised to this frequency by using a 12 MHz
signal coming from the reference oscillator of the micro controller/Teletext decoder. The
horizontal drive is switched on and off via the soft start/stop procedure. This function is realised
by means of variation of the T ON of the horizontal drive pulses. In addition the horizontal drive
circuit has a ‘low-power start-up’ function. The vertical synchronisation is realised by means of
a divider circuit. The vertical ramp generator needs an external resistor and capacitor. For the
vertical drive a differential output current is available. The outputs must be DC coupled to the
vertical output stage. In the types which are intended for 90 degree picture tubes the following
geometry parameters can be adjusted:
•Horizontal shift
•Vertical amplitude
•Vertical slope
•S-correction
•Vertical shift
The types which are intended to be used in combination with 110 degree picture tubes have an
East-West control circuit in stead of the AVL function.

8
The additional controls for these types are:
•EW width
•EW parabola width
•EW upper and lower corner parabola correction
•EW trapezium correction
•Vertical zoom
2A.6: CHROMA AND LUMINANCE PROCESSING: - The chroma band-pass and trap circuits
(including the SECAM cloche filter) are realised by means of gyrators and are tuned to the right
frequency by comparing the tuning frequency with the reference frequency of the colour
decoder. The luminance delay line and the delay cells for the peaking circuit are also realised
with gyrators. The circuit contains a black stretcher function which corrects the black level for
incoming signals which have a difference between the black level and the blanking level.
2A.7: COLOUR DECODER :- The IC can decode PAL, NTSC and SECAM signals. The
PAL/NTSC decoder does not need external reference crystals but has an internal clock
generator which is stabilised to the required frequency by using the 12 MHz clock signal from
the reference oscillator of the micro controller/Teletext decoder. Under bad-signal conditions
(e.g. VCR-playback in feature mode), it may occur that the colour killer is activated although
the colour PLL is still in lock. When this killing action is not wanted it is possible to overrule the
colour killer by forcing the colour decoder to the required standard and to activate the FCO-bit
(Forced Colour On) in subaddress 21H. The Automatic Colour Limiting (ACL) circuit
(switchable via the ACL bit in subaddress 20H) prevents that over saturation occurs when
signals with a high chroma-to-burst ratio are received. The ACL circuit is designed such that it
only reduces the chroma signal and not the burst signal. This has the advantage that the colour
sensitivity is not affected by this function. The SECAM decoder contains an auto-calibrating
PLL demodulator which has two references, viz: the divided 12 MHz reference frequency
(obtained from the microcontroller) which is used to tune the PLL to the desired free-running
frequency and the bandgap reference to obtain the correct absolute value of the output signal.
The VCO of the PLL is calibrated during each vertical blanking period, when the IC is in search
or SECAM mode. The base-band delay line (TDA 4665 function) is integrated. This delay line

9
is also active during NTSC to obtain a good suppression of cross colour effects. The
demodulated colour difference signals are internally supplied to the delay line.
2A.8: RGB OUTPUT CIRCUIT AND BLACK-CURRENT STABILIZATION : In the RGB control
circuit the signal is controlled on contrast, brightness and saturation. The ICs have a linear
input for external RGB signals. It is possible to use this input for the insertion of YUV signals.
Switching between RGB and YUV can be realised via the YUV-bit in subaddress 2BH. The
signals for OSD and text are internally supplied to the control circuit. The output signal has an
amplitude of about 2 Volts black-to-white at nominal input signals and nominal settings of the
various controls. To obtain an accurate biasing of the picture tube the ‘Continuous Cathode
Calibration’ system has been included in these ICs. A black level offset can be made with
respect to the level which is generated by the black current stabilization system. In this way
different colour temperatures can be obtained for the bright and the dark part of the picture.
The black current stabilization system checks the output level of the 3 channels and indicates
whether the black level of the highest output is in a certain window (WBC-bit) or below or
above this window (HBC-bit). This indication can be read from the status byte 01 and can be
used for automatic adjustment of the Vg2 voltage during the production of the TV receiver.
During switch-off of the TV receiver a fixed beam current is generated by the black current
control circuit. This current ensures that the picture tube capacitance is discharged. During the
switch-off period the vertical deflection is placed in an overscan position so that the discharge
is not visible on the screen.
2B. - MICROCONTROLLER WITH TELETEX DECODER: - The integrated teletex decoder
with embedded microcontroller is a control system designed for TV sets with analogue picture
and sound control. The system also offers an on screen display (OSD) and IR remote control of
all functions.
3. TUNER: - GDC Tuner EWT 5F3T1 is controlled by I2C bus through IC TDA 9361.The
tuning is based on frequency synthesis tunning.

10
CHANNEL COVERAGE :
OFF AIR CHANELS
BAND
CHANEL RANGE FREQUENCY
( IN MHZ)
LOW BAND E2- S9 48.25 – 161.25
MID BAND S10 – S41 168.25 – 463.25
HIGH BAND E21 – E69 471.25 – 855.25
4. VIDEO SWITCH BU 4052: The HEF4052 is a dual four channel analog multiplexer. The
main function of this device is to accept an AV input from SCART, external AV and switch the
required output at pin no Z which is applied to small signal processing IC.
5. SOUND PROCESSOR: TDA 9859 is designed to perform demodulation of FM TV sound.
The TDA 9859 selects signal from Three Stereo Sources or Six Mono Sources and out put
can be given to scart. The sound processor is I2C bus controlled and all settings of bus are
stored in sub address register.
6. SOUND OUTPUT: - IC AN17821 is used as the AF out amplifier for the Stereo application.
It is supplied by 13 volts from the 13 volt DC coming from a separate winding in the SMPS
transformer. An out power of 1.5 Watt can be delivered into an 8 Ohm Load. This IC is also
having a feature of auto volume controller. Similarly stand by signal coming from
microcontroller is used to disable the sound out put from speaker.
7. VERTICLE OUTPUT STAGE:- The STV 9302 is a vertical deflection circuit can be used
for 90 degree and 110 degree deflection systems . One supply voltage for the scan is
required. The drive voltage is amplified by an amplifier. The supply voltage of this IC is 15
Volts.
8. VIDEO OUTPUT AMPLIFIER: The RBG output signal from TDA 9351 is applied to video
output amplifier section. IC TDA6107 or transistorized circuit can be used for video signal
amplification and to be applied to cathodes of CRT for generation of R, G, and B colors. If IC

11
is used, then internal amplifiers are used to amplify the video signal. The transistorized
amplifier can be designed by using transistor circuit in which 9 transistors are used. Chassis
VE01 consist of transistorized video amplifier circuit.
9. POWER SUPPLY: The DC Voltages required at various part of the chassis are applied by
SMPS transformer controlled by STR 0765, which is designed for deriving, controlling and
protecting switiching transistor of SMPS. The transformer produces 110 volts for FBT, 13 Volt
for audio O/p IC, 33 Volts for tuner and 5 and 8 Volts regulated voltages through IC TA7805
and TA7808.
10. MEMORY IC : The 24C16 is a 16 Kilo Bit electrically erasable programmable memory.
EEPROM organized as 128 pages X 16 bytes. This is compatible with I2C standards, two
wire serial interface which uses a bi directional data bus and serial clock.

12
11. IC DISCRIPTION AND PIN DETAILS
•TDA 9351ÆTV Signal processor- Teletex decoder with embedded microcontroller
•HEF 4052BP-ÆVideo Switch
•STV 9302-ÆVertical Deflection Output
•24C16-ÆMemory IC
•TDA 9859-ÆSound Processor
•AN 17821-ÆSound Output
•KA 5Q0765-ÆSTR
•Video amplifier.
11A. TDA 9351:- This IC is the functions of a TV signal processor together with a
microcontroller and US Closed Caption decoder. The IC is used in television receivers with
90degree and 110 degree picture tubes. The ICs have supply voltages of 8 V and 3.3 V and
they are mounted in S-DIP envelope with 64 pins. This IC is having higher degree of
integration because delay line with adjustable delay time, PAL / SECAM / NTSC decoder has
been integrated. In addition to this some special features like Continuous Cathode
Calibration’, white point and black level offset, AVL are added in this version. As this is a
combination of microcontroller and TV signal processor, the features of IC are divided in two
sections
TV Signal processor Important Features
•Internal (switchable) time-constant for the IF-AGC circuit.
•A choice can be made between versions with mono intercarrier sound FM
demodulator and versions with QSS IF amplifier.
•The mono intercarrier sound versions have a selective FM-PLL demodulator which
can be switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz).The
quality of this system is such that the external band-pass filters can be omitted.
•Source selection between ‘internal’ CVBS and external CVBS or Y/C signals
•Integrated chrominance trap circuit
•Integrated luminance delay line with adjustable delay time
•Asymmetrical ‘delay line type’ peaking in the luminance channel
•Black stretching for non-standard luminance signals

13
•Integrated chroma band-pass filter with switchable centre frequency
•Only one reference (12 MHz) crystal required for the microcontroller, Teletext- and the
colour decoder
•PAL/NTSC or multi-standard colour decoder with automatic search system
•Internal base-band delay line
•RGB control circuit with ‘Continuous Cathode Calibration’, white point and black level
offset adjustment so that the colour temperature of the dark and the light parts of the
screen can be chosen independently.
•Linear RGB or YUV input with fast blanking for external RGB/YUV sources. The
Text/OSD signals are internally supplied from the microcontroller/Teletext decoder
•Contrast reduction possibility during mixed-mode of OSD and Text signals
•Horizontal synchronization with two control loops and alignment-free horizontal
oscillator
•Vertical count-down circuit
•Vertical driver optimized for DC-coupled vertical output stages
•Horizontal and vertical geometry processing
•Horizontal and vertical zoom function for 16 : 9 applications
•Horizontal parallelogram and bow correction for large screen picture tubes
Special Features of micro Controller
•80C51 microcontroller core standard instruction set and timing
•1 microsecond machine cycle
•32 - 128Kx8-bit late programmed ROM
•3 - 12Kx8-bit Auxiliary RAM (shared with Display and Acquisition)
•Auxiliary RAM page pointer
•16-bit Data pointer
•IDLE and Power Down (PD) mode
•14 bits PWM for Voltage Synthesis Tuning
•8-bit A/D converter
•4 pins which can be programmed as general I/O pin, ADC input or PWM (6-bit) output
•Text memory for 1 or 10 pages