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OSCILLATOR PHASE CONTROL
E5
<15>
FLOP1
+5VD
E5
<15>
FLOP2
H4
+5VD
D
2
Q
5
CK
3
Q
6
P
R
4
C
L
1
U985A
74HC74
D
12
Q
9
CK
11
Q
8
P
R
1
0
C
L
1
3
U985B
74HC74
<15>
J1081
FRAME PULSE SELECT
1-2 INTERNAL
2-3 EXT VIDEO
123
J1081
P1081
SYNC_GATE
+5VD
+5VD
R985
1.00K
Q969
Q-0190
Q970
Q-0190
C969
.001UF
+5VD
+12V2
R1070
10.0K
R970
10.0K
R969
30.1K
R968
100.0
EXT V1 PULSE
NTSC -- F1 L11
PAL -- F1 L7
3-5V P-P
1
2
J870
G3
<9>
REF_H
NOT USED
FLYWHEEL COUNTER
7US HALF-SHOT
LOGIC
COLOR FRAME
I/CK
1
I
2
I
3
I
4
I
5
I
6
I
7
I
8
I
9
I
10
I
11
I
13
I
14
I
23
I/O
22
I/O
21
I/O
20
I/O
19
I/O
18
I/O
17
I/O
16
I/O
15
U980
20V8
J147-9
J147-11
B4
<12>
B4
<12>
TP981
/FLD_SCH_BLK
BRUCH
SCH DISPLAY MODE
J1085
1-2 DOUBLE
2-3 SINGLE
J130-9
H1
<7>
B1
<12>
(ACTIVE IN NTSC ONLY)
123
J1085
P1085
FIELD_1
FLOP1
FLOP2
+5VD
R1085
10.0K
0=EXT
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
NC
NC
J147-7
B4
<12>
E5
<9>
H4
<15>
E4
INT/EXT
/VERT_LOCKOUT
/FLD_CHROMA_SW
C875
.1UF
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
+5VD
I/CK
1
I
2
I
3
I
4
I
5
I
6
I
7
I
8
I
9
I/O
19
I/O
18
I/O
17
I/O
16
I/O
15
I/O
14
I/O
13
I/O
12
I/OE
11
U977
16V8-25Q
A
1
QA
3
QB
4
QC
5
QD
6
CLR
2
U975A
74HC393
+5VD
R872
1.00K
A
13
QA
11
QB
10
QC
9
QD
8
CLR
12
U975B
74HC393
F2
<9>
V_SYNC
BIT 8
<12>
B4
<12>
G3
<8>
J147-8
SYNC_PHASE
+V_OUT
= (-)SLOPE SC
= +V BURST PHASE
NC
E5
<15>
/DOUBLE
SEE ELECTRICAL PARTS LIST
PARTS WITHIN BOX
HAVE BEEN CHANGED
IN REAR OF MANUAL
1780R-SERIES
SCH PHASE TIMING <14>
PART OF A2 WAVEFORM BOARD