4-20
OEP-3 V1 (UC)
(4) Decoder block
On this board, the Y/C jungle (CXA2076Q IC203) for a color television is used for decoding of a
video signal. This circuit is compatible with both NTSC and PAL systems. It integrates luminance
signal processing, chroma signal processing, RGB signal processing, and sync signal processing into
one chip. Each adjustment and setting are controlled by I
2
CBUS.
The input luminance and chroma signals are input to pins 55 and 57 of IC203. After each processing
has been performed, the input signal is output from pins 22, 24, and 26 as an RGB signal.
A VBS/S video signal is delayed by the processing in IC203. Therefore, the signal passed through a
delay line (DL101) of 350 ns is used for sync separation so as to make the timing of a video signal
coincide with that of a sync signal. (Input signal at pin 56)
The hue and color that the user adjusts are adjusted by IC203.
IC202 is a 1H CCD delay line for PAL.
Fig. 1-4 Decoder Block
3.58
4.43
FSC
DEC_YOUT
TP204
R252
39
CL206
C214
10uF
16V
L201
1uH
A_GND
X203
50MHz
C250
10uF
16V
C239
0.01uF
0.01uF
C237
C235
0.01uF
C216
0.1uF
C257
0.1uF
R239
4.7k
R240
1.5k
R228
100
A+9V
R234
1k
R236
4.7k
R235
4.7k
C252
10uF
16V
C253
0.1uF
C254
0.1uF
R238
4.7k
R237
4.7k
C255
0.1uF
C259
47uF
16V
C256
0.1uF
C258
0.1uF
C251
10uF
16V
C232
47uF
16V
C233
0.1uF
R231
1k
R233
1k
R232
1k
Q205
2SC1623-T1-L5L6
C241
47uF
16V
C244
0.1uF
C245
0.1uF
C242
0.1uF
R230
2.7k
C224
0.0047uF
C225
0.47uF
R222
100
R221
470
R220
2.2k
C230
0.1uF
C228
0.1uF
C231
0.001uF
R226
1M
C247
0.1uF
C223
1uF
R224
10k
C221
0.001uF
C222
0.001uF
IC202
CXL5520M-T4
TP203
C226
0.1uF
C248
0.01uF
C246
0.01uF
C243
0.01uF
R219
1.8k
C220
100pF
Q204
2SA812-T1-M5M6
C227
1uF
50V
R223
330k
R225
10k
R227
470
C234
2.2uF
50V
R229
5.6k
C236
0.01uF
C238
0.0047uF
C249
0.1uF
CL202
C215
0.47uF
C213
0.47uF
C212
0.1uF
NM
CT202
30pF
C209
15pF
X202
3.579545MHz
R216
1.5k
NM
CT201
30pF
C208
15pF
X201
4.433619MHz
R215
470
R214
15k
C210
0.47uF
C211
470pF
C219
47uF
16V
C218
10uF
16V
C217
10uF 16V
R217
220
R218
220
IC203
CXA2076Q-TL
6
VCOIN
11
VO_RY
12
VO_BY
2
AB
8
GND
16
VI_RY
5
SAND
1
VDD
14
VI_BY
64
FSCOUT
63
NC
62
X358
61
X443
60
APCFIL
59
SVCC1
58
TEST
57
CIN
56
EXTSYNCIN
55
YIN
54
DCTRAN
53
CVIN
52
BLHOLD
51
SDA
50
SCL
49
VM
48
SYNCOUT
47
HSIN
46
VSIN
45
VSFIL
44
DVCC2
43
IREF
42
DGND
41
CERA
40
AFCFIL
39
L2FIL
38
AFCPIN/HOFF
37
HDOUT
36
DVCC1
35
SAWOSC
34
VAGCSH
33
E-WOUT
32
VD+OUT/VPROT
31
VD-OUT/VPROT
30
VTIM
29
ABLFIL
28
ABLIN/VCOMP
27
IKIN
26
BOUT
25
BSH
24
GOUT
23
GSH
22
ROUT
21
RSH
20
SVCC2
19
B2IN
18
G2IN
17
R2IN
16
YM
15
YS2
14
B1IN
13
G1IN
12
R1IN
11
YS1
10
SCPOUT
9
SGND2
8
-BY_IN
7
-RY_IN
6
YRET
5
YOUT
4
-BY_OUT
3
-RY_OUT
2
SGND1
1
SCMREF
Summary of Contents for OEP-3
Page 1: ...COLOR VIDEO PRINTER OEP 3 SERVICE MANUAL Volume 1 1st Edition...
Page 6: ......
Page 80: ......
Page 119: ...4 11 OEP 3 V1 UC Memory Configuration Eight Frame Memory Configuration Four Frame...
Page 154: ......
Page 165: ...5 11 OEP 3 V1 UC 5 5 Direct Chuck Mechanism...
Page 176: ...2000 9 22 OEP 3 UC E 9 955 247 11...