FUNAI 23C-250, Service Manual

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VIDEO (L) HEAD
CYLINDER ASSEMBLY
VIDEO (R) HEAD
V(L)
V-COM
V(R)
CN251
1
2
3
10
Video Block Diagram
1-7-3 1-7-4 H8743BLV
(DECK ASSEMBLY)
BUFFER
Q305
BUFFER
Q308
C-SYNC C-SYNC
OSD-BB-OUT
C-ROTA
TU701
CN751 TO CN101
FROM/TO
JACK BLOCK
TP751 V-OUT
TU-VIDEO 24
26
FBC
VXO
CHARA
INS.
Y/C
MIX PIC-CTL
ANR
KILL
B.D.
AMP
NOISE
CANCEL
M
DE EMPA
CCD 1H
DELAY
1/2
Y-LPF
CLAMP
L
R
REC FM
AGC
PB FM
AGC
FM
DEMOD.
DOUBLE
LIMIT
V/I
CONV
SUB
LPF
SERIAL
DECORDER
11
93
V-ENV
RF-SW
TO
SERVO/SYSTEM
CONTROL BLOCK
C-ROTA
ENV DET
TP502 RF-SW
TO
SERVO/SYSTEM
CONTROL BLOCK
I2C BUS SDA-1
I2C BUS SCL-1
C-LPF
R P
R
P
R P
R P
R/P
B/B
R
P
DOC YNR Y/C COMB
ACC
B-UP
AMP
MAIN
CONV
R
R
P
P
R P
SUB
CONV
4.43MHz
629KHz
21 24 23 20
IC301
IC501
(Y/C PROCESS) 29 67 66 49
X302
4.43MHz
43 45 46 41
Q307
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
BUFFER
Q304
Q371
Q372
BUFFER
88
89
90
91
72 71 57 59 54 52 51 61
28
D-V SYNC D-V SYNC
25
27
21
31
30
33
OSD-CHARA-OUT
38
17
19
18
MAP BPF
BPF
D.E.
NL
EMPHA
C-COMB COMB
AMP
CCD
LPF
BPF
KIL
Q302,
Q303 PEAKING
AMP
V-OUT
7
V-IN 5
TU-VIDEO 19
32 31
EE
AGC
CLAMP
REC
FM-EQ
PB
FM-EQ
FM
MOD
DETAIL
ENH
W/D
CLIP
CLAMP
MAIN CBA
74
WF2
WF1
IC370 (PAL/SECAM DECTECOTR)
VXO/XO/OUT2 5
VIDEO-SW 3
C-PB
PAL/SECAM
DETECTOR
9
5
3
9
TRICK-H 8
REC-C OUT 10
C-SYNC 1
8
10
1
SECAM-H 7 7
SECAM CBA
CN370 CN371
2
15
13
1
17
27
26
26
TRICK-H
TO SERVO/SYSTEM
CONTROL BLOCK SECAM-H
TP301 C-PB WF5
BUFFER
Q311
AMP
Q310
Q309
SECAM-CHARA-H
BUFFER
BUFFER