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74HC04
74HC04
B5
DIR_REMSYNC
1
R187
200.0
9
10
8
U185C
74HC00
12
13
11
U185D
74HC00
REF OR REMOTE SYNC SWITCH
B4
G2
<8>
COMP_SYNC
/REM_SYNC_EN
J147-4
J147-6
<12>
<12>
REMOTE SYNC
POLARITY
B3
J192
1-2 POSITIVE
2-3 NEGATIVE
123
J192
P192
REM_SYNC
1
2
U190A
74HC04
11
10
U190E
/DIR_REMSYNC_EN
+5VD
R283
20.0K
R180
500.0
1
2
3
U185A
74HC00
4
5
6
U185B
74HC00
B5
<10>
<10>
J147-20
B4
<12>
V SYNC
REF_SYNC
V SYNC FREERUN GENERATOR
+5VD
B5
<10>
/V_SYNC
+5VD
R288
475.0K
R290
1.50K
+5VD
NC
C290
.1UF
R393
10.0K
R390
51.1K
R392
249.0
Q
3
DIS
7
THR
6
CV
5
TRIG
2
RST
4
GND
1
VCC
8
U291
LM555
Q391
CR392
1/4W
DETECTOR
R285
13M
C390
.01UF
C285
1000PF
+12V2
-12VDCPL-12VDCPL
R287
750.0K
R286
54.9K
R385
26.7K
CR386
CR385
Q385
C380
.22UF
C287
.1UF
R282
20.0K
R281
20.0K
Q282
NC
3 4
U190B
74HC04
38uS
H/2 LOCKOUT
C196
1800PF
+5VD
R196
49.9K
C
X
1
5
R
X
1
4
A
12
B
11
C
L
1
3
Q
10
Q
9
U297B
96LS02
E5
<12>
E5
<12>
FLD2/FLD1
2L/F
SWITCH
FLD1/FLD2
DIRECT/AFC &
FLD_RETRACE_GATE1A
1
1B
12
1C
13
1D
9
1E
10
1F
11
1Y
8
2Y
6
2A
2
2B
3
2C
4
2D
5
U395
74LS51
9
8
U190D
REF H SYNC GENERATOR
A4
<10>
0.5uS
C495
270PF
+5VD
R495
4.12K
J147-18
B4
<12>
F2
<7>
B5
<10>
C3
<14>
1.2uS
C496
1000PF
V_SYNC
+5VD
+5VD
R496
2.80K
R696
2.00K
R695
301.0
5 6
U190C
74HC04
C
X
1
R
X
2
A
4
B
5
C
L
3
Q
6
Q
7
U596A
96LS02
F2
<7>
B2
<10>
+REF_H_SYNC
B3
<14>
J147-16
B4
<12>
REF_H
-REF_H_SYNC
2
+5VD
+5VD
R698
2.00K
R697
100.0
NC
B4
<12>
J147-12
J865
INPUT_H_SYNC
+5VD
+5VD
R888
750.0
11
10
U880E
74HC04
C
X
1
5
R
X
1
4
A
12
B
11
C
L
1
3
Q
10
Q
9
U596B
96LS02
SYNC FOR
VECTOR CLAMPS
B4
1-2 REF
2-3 INPUT
P865
123
J865
AFC_SYNC
<12>
J147-14
320uS
E5
<12>
C198
.01UF
DIR/AFC
+5VD
+5VD
R197
75.0K
C
X
1
R
X
2
A
4
B
5
C
L
3
Q
6
Q
7
U297A
96LS02
+5VD
5uS
LOSS OF REF
SYNC DETECTOR
INTERNAL
SYNC DETECTOR
WAVEFORM
CLAMPS
SYNC FOR
J866/J867
1-2 REF
2-3 INPUT
P866
123
J866
P867
C870
1000PF
123
J867
+5VD
R870
4.99K
5uS
C861
1000PF
+5VD
R860
4.32K
2uS
C4
<7>
C855
1000PF
ON/OFF+5VD
C
X
6
R
X
7
A
9
B
10
C
L
1
1
Q
5
Q
12
U858B
74C221
1A
1
1B
12
1C
13
1D
9
1E
10
1F
11
1Y
8
2Y
6
2A
2
2B
3
2C
4
2D
5
U958
74LS51
J1406-2
C5
<7>
C5F5
C858
.1UF
CLAMP_-
CLAMP_+
+5VD
+5VD
R855
1.50K
SEE ELECTRICAL PARTS LIST
PARTS WITHIN BOX
HAVE BEEN CHANGED
J1406-1
<7><3>
SOUND-IN-SYNCS
1-2 NORMAL
2-3 SIS
J858
P858
1
2
3
J858
W858
0 OHM
Q861
Q-0190
+5VD
R958
10.0K
R959
20.0K
NC
C5
<7>
D4
<14>
BP/ST
/VERT_LOCKOUT
+5VD
C
X
1
4
R
X
1
5
A
1
B
2
C
L
3
Q
13
Q
4
U858A
74C221
NC
LOSS OF INT
+5VD
1
2
3
U790A
74HC32
NC
51uS
C771
.1UF
C767
1000PF
+5VD
+5VD
+5VD
R770
20.0K
R767
33.2K
C
X
1
4
R
X
1
5
A
1
B
2
C
L
3
Q
13
Q
4
U767A
74HC221
C
X
6
R
X
7
A
9
B
10
C
L
1
1
Q
5
Q
12
U767B
74HC221
H4
<8>
INT_SYNC
1780R–SERIES
SYNC DETECTOR
CLAMP PULSE GENERATOR FOR WAVEFORM DISPLAY
HORIZ & VERT SYNC GENERATORS <9>
IN REAR OF MANUAL
PART OF A2 WAVEFORM BOARD