Sony IFB-12 Service Manual page 26

RL1
2
CN1 J2
3
R/PR
1
R IN/OUT
4
R-Y/VIDEO
10V
9
8
LD1
7
(POWER)
RL2
2
CN2
3
G/Y
G IN/OUT 4
4
Y/Y
9
8
7
RL3
2
CN3
B/PB 3
B IN/OUT 7
4
B-Y/C
9
8
7
RL4
2
CN4
3
SYNC/HD
HD IN/OUT 9
4
9
CN5
8
VD VD IN/OUT 11
7
RL5
AUDIO IN/OUT
J3
2
3
CN6
1 AUDIO L AUDIO L 1
L 4
(MONO)
9
CN7 8
4 AUDIO R AUDIO R 4
7
R
AUDIO L 3
3 AUDIO L
AUDIO
SUB
IC7
AMP
R
3 +
6
2
IC8
AMP
G
3 +
6
2
IC9
AMP
B
3 +
6
2
IFB-12(NEW)
IFB-12A
(INTERFACE)
IFB-12 (NEW) /IFB-12A
IC19
AMP
3
+
6
2
IC20
AMP
JP1 3
+
6
1 3 2
+10V +10V
R IC21
AMP
SW3
3 +
75
6
2
12V
G
SW4
HD
75
VD
JP2
SW6
3
1
B
75
SW5
75
H-THRU
BUFFER BUFFER,SLICER
HD
V-THRU Q10,12,27
VD
SW9
SW7
IFB-12A
BUFFER
75 Q14
IFB-12(NEW)
IC4
AUDIO SW
AUDIO BUFF
5
6
Q16
3 10V
AUDIO BUFF
1 2
Q17
7
AL
AR
IC10
IC13
PEAKING SW
AMP
CR1
1 IN1 OUT 11 3 + R OUT
6
2
IN2 S1 14
3
13
S2
LEVEL SHIFT,
IN3
5 S3 9
BUFF,BIAS
8
S4 D12,Q18,IC16
7 IN4
IC11 IC14
PEAKING SW
AMP
CR2
1 IN1 11 3 G OUT
OUT +
6
2
IN2 S1 14
3
13
S2
LEVEL SHIFT,
IN3
5 9
S3
BUFF,BIAS
S4 8 D13,Q19,IC17
7 IN4
IC12
IC15
PEAKING SW
AMP
CR3
1 IN1 OUT 11 3 B OUT
+
6
2
3 IN2 S1 14
S2 13
LEVEL SHIFT,
5 IN3
S3 9
BUFF,BIAS
8 D14,Q20,IC17
S4
7 IN4
SW POSITION
10V
1
3C-2V Cable
2
5
5C-2V Cable
SW8
3
4
6-2
IFB-12 (NEW) /IFB-12A
RL7
4
3
2
7
8
9
RL8
4
3
2
7
8
RL6
9
RELAY DRIVE
Q9
2
3
RL9
4
4
H-THRU
3
9
8 2
7
7
V-THRU
8
9
SW10
IFB-12A
IFB-12(NEW)
SYNC SEP
JP5
3 1
Q29-34
BUFF
2
Q13
PEAK HOLD
3 +
Q11
2
PEAK HOLD
5 +
Q15
6
RELAY DRIVE
+5V
Q21
MODE SW
RELAY DRIVE
Q2
Q1
IC23
+B
+5V REG
+5V 3 OUT IN 1
12V
IC24
10V
+10V REG
+B SW
3 OUT
IN 1
Q28
+B IK PROT
Q22
+B SW PROTECTOR
Q26 Q23,24
+B SW
Q25
1 2 3 4
up to 0.5m up to 12m up to 25m up to 50m
up to 1m up to 25m up to 50m up to 100m
6-2
B15
A21
B21
C21
A12
B12
C12
A25
B25
C25
A14
B14
C14
A29
B29
C29
JP4
VIDEO SYNC
IC2 1
3
3
JP3
SYNC
SYNC
VIDEO
SEP 1
1 3
1
2
1 7
6
3
HD
7 5
B8
IC3
IC1
COMPARATOR
BUFFER
VD
B10
A7
A8
AL
B1
AR
B6
R
B3
G
B5
B
B7
6 7
A17
5 8 MODE SW
Q4
D6
3 10 MODE SW
B16
Q5
4 9 MODE SW
C17
Q6
1 12
MODE SW
Q7
SW12
OUTPUT SIGNAL
2 11
MODE SW
SELECT
Q8
SW1
RGB
(DIP SW) B31
MIX
6
7
IC25
5
NOR
+
3
5V
1
–
2
IC26
COMPARATOR
C19
B23
A2
IN
OUT
SW2
IN/OUT SELECT
J1
STC
R/C/R-Y
R/C/R-Y
R/C/R-Y
HD/CS
HD/CS
HD/CS
G/Y/Y
G/Y/Y
G/Y/Y
VD
VD
VD
B/C/B-Y
B/C/B-Y
B/C/B-Y
HS
TO
VS
SIGNAL INTERFACE
AUDIO L
SWITCHER
AUDIO R
AUD.L
AUD.R
RED
GREEN
BLUE
RGB/VIDEO
CODE 1
VIDEO/YC
MIX
SEL
I/O
PROTECT
IFB-12/12A