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C156
.1UF
+12V
<25>
H1
AMP_CHROMA
1
C357
.01UF
R357
1.00K
DIFFERENTIAL GAIN
DEMODULATOR
R257
100.0
MIRROR
CURRENT
C157
51PF
R158
499.0
R156
150.0K
R155
1.00K
R157
499.0
2
1
36
4
5
Q158
Q-0261
LOW PASS FILTER
Q160
Q-0188
C162
10UF
+12V
R164
4.02K
R162
47.5
LIMITER
+12V
R161
4.99K
R359
200.0
1
5 2
3
1
4
6
1
2
8
10
4
U261
1496P
R258
100.0
C358
.01UF
R358
1.00K
DEMODULATOR SWITCHING
J885-21
<25>
A2
TRIG_EN
2
Q677
Q-0188
C676
250PF
+5V
R677
475.0
Q278
Q-0164
-12V
R272
1.65K
R278
5.62K
R281
1.00K
DG
OFFSET
C257
.1UF
-12V
R364
1.00K
R360
604.0
R361
100.0
R264
100.0
Q265
Q-0190
Q159
Q-0190
R166
909.0
R159
4.99K
R160
750.0
R167
500
4
Q167
Q-0216
C165
40PF
C277
214PF
C166
77PF
+12V +12V
R165
100.0
R263
2.00K
R275
1.00K
R163
4.02K
R274
1.00K
OUTPUT AMPLIFIER
C273
82PF
+12V
R372
1.65K
R373
1.00K
R277
2.00K
R276
1.00K
R370
2K
Q277
DEMOD
GAIN
750MV = 7%/DEG NTSC
5%/DEG PAL
5
1.0V +/- 0.75V
J885-35
<25>
A3
TP379
DEMOD
2.55K1.65K
1781R1780R
C373
.1UF
+12V
+12V
-12V
R377
6.81K
R371
2.26K
R378
619.0
R369
500
NC
C377
.1UF
NC
2
3
6
7
4
8
15
U375
NE5534
R372
CKT #
-12V
C365
.01UF
C360
.01UF
-12V
R363
1.00K
R362
499.0
R366
100.0
R365
604.0
J885-14
<25>
A2
/DG_FLTR
<25>
D3
/DG
R678
1.00K
R675
15.0K
D
2
Q
5
CK
3
Q
6
P
R
4
C
L
1
U386A
74HC74
D
12
Q
9
CK
11
Q
8
P
R
1
0
C
L
1
3
U386B
74HC74
<27>
D5
<25>
D3
H_SYNC /DP
+5V
3
J885-24
J885-23
<25>
<25>
A3
A3
C481
.01UF
C482
.01UF
QFSC2
R381
1.00K
DP
ZERO
DEMODULATOR
DIFFERENTIAL PHASE
C171
*SEL
C172
3.9-27PF
R270
100.0
R271
100.0
R170
392.0
R173
392.0
6
1
2
8
10
4
U267
1496P
DEMOD
OFFSET
C369
10UF
-12V
R368
100.0
SEE ELECTRICAL PARTS LIST
PARTS WITHIN BOX
HAVE BEEN CHANGED
IN REAR OF MANUAL
C383
.1UF
+5V
1
5 2
3
1
4
C264
.1UF
-12V
R367
365.0
<28>
E2
C131
15PF
QUADSC1
QUADSC2
R130
619.0
R133
619.0
Q279
Q-0164
QFSC1
R382
1.00K
R282
1.00K
R280
5.62K
R273
1.65K
1780R–SERIES
-12V
PART OF A6 VECTORSCOPE BOARD
DIFF PHASE/GAIN <26>