Sharp 64LHP5000 Service Manual page 77

Ë CD74HCT4046AM (SUB VIDEO ASSY: IC4713)
PLL IC
» Pin Assignment
PCP 1 16 V
OUT CC
PC1
OUT 2 15
PC3
OUT
COMP 3 14
IN SIG
IN
VCO 4 13
OUT PC2
OUT
5
INH 12
R
2
C1
A
6 11
R
1
C1
B
7 10
DEM
8 9
GND VCO
IN
» Pin Function
Pin No. Pin Name I/O
1 PCPOUT —
2 PC1OUT —
3 COMPIN I
4 VCOOUT —
5 INH I
6 C1A —
7 C1B —
8 GND —
» Block Diagram
V
CC
12
R
2
CURRENT
MIRROR
V
CO
9
IN
11
R
1
OUT
DEM
10
OUT
5
INHIBT
HC/HCT4046A
16
C 2
V
CC
R
4
Function
Phase comparator pulse output
Phase comparator 1 output
Comparator input
VCO output
Inhibit input
Capacitor C1 connection A
Capacitor C1 connection B
Ground(0V)
C
1
C1A C1B
6 7
CURRENT
AMP.
+
P P
-
N N
J Q
+
-
K
Q
+
-
PHASE II
CURRENT
SOURCE V
CC
SWITCH
P
N
13
8
GND
PHASE COMP II OUTPUT
Pin No. Pin Name I/O
9 VCOIN —
10 DEMOUT —
11 R1 —
12 R2 —
13 PC2OUT
14 SIGIN
15 PC3OUT —
16 Vcc —
77
64LHP5000
PROJECTOR UNIT
VCO OUT COMP IN SIG IN
PHASE COMP
OUT I
4 3 14
PHASE I
PHASE III
S
R
C
Q
D
Q
"1" Cd
Cd
VCO C Q
D
Q
"1"
PHASE PULSES
1
PHASE PULSE OUTPUT
Function
VCO input
Demodulator output
Resistor R1 connection
Resistor R2 connection
O Phase comparator 2 output
I Signal input
Phase comparator 3 output
Positive supply voltage
III
2 15
Q
Q