Panasonic PT-56DLX25 Service Manual page 73

DIGITAL TUNER BLOCK DIAGRAM (1/2)
DIGITAL TUNER C.B.A.(CIRCUIT BOARD DT)
TUNER
IC8209 (MIXER)
Q8201,
Q8200 Q8203
D8200
RF-IN OOB FILTER AGC
1 13
AFT
AFT
11
<TO IC6003 (94)>
IC8206 (AGC)
XF8200
SAW 2
DIGITAL IF AGC
19
FILTER
3
VCC
1 4
+5V
IC8204 (SW)
4
(DIGITAL ON)
2 1
VCC
5
+9V
IC8203 (SW)
4
(ANALOG ON)
AGC 8 2 1
VCC
5
+9V
ANALOG RF AGC 12
IC8202 (SW)
(DIGITAL ON) 13
I2C SERIAL DATA
9 2 1
5
(ANALOG ON)
3 4
12
(DIGITAL ON)
I2C SERIAL CLOCK 10 10 11
6
(ANALOG ON)
9 8
VCC
14
+5V
IF SW(DIGITAL(L)/ANALOG(H)) 20
+30V 4 +30V
+5V 2 +5V
+5V 7
+5V 18
VIDEO
13
ANALOG AUDIO (R) 15
AUDIO (L) 16
IC8245 (AGC) IC8211 (DEMODULATOR)
XF8202
VHF IF SAW 2 7 14
AGC
9
MIX AMP FILTER
3 8 15
VCC
1 4
59 AP FDC AGC
+5V
VHF 1 30 AP TS OUT P
OSC 2 29 AP TS OUT C
VCC
10
+5V
58 AP FDC RF AGC
IC8207 (AGC)
XF8201
7 SAW 2 7 39
AGC
FILTER
8 3 8 40
VCC
1 4
176 AP FDC CONT
+5V
IC8205 (OP AMP)
2 54 AP IF AGC
1
3 +5V
6 53 DIGITAL RF AGC
7
5 +5V
VCC
8
+5V
+3.3V
5,8,10,13,ETC
+1.2V 20,22,27,ETC
X8200
35 25MHz OSC
25MHz
OSC 25MHz OSC
36
I2C SERIAL DATA
62
63 I2C SERIAL CLOCK
DIGITAL(H)/ANALOG(L)
DIGITAL(L)/ANALOG(H)
DIGITAL(H)/ANALOG(L)
DIGITAL(L)/ANALOG(H)
IC8216 (POD ASIC)
115 120
DECODER
114 128
TS DATA
106 51 DATA
108 54 CLOCK
ENABLE
94 56
DEMODULATOR
91 49 PAK SYNC
92
93 60 ERROR
D8203 D8204
SYNC ERROR
VCC +3.3V VCC
5,24,45,ETC
IC8220
VCC
+2.5V
1 5 2,16,50,ETC VCC
REG.
RESET(L) 68
I2C 87
RESET(L)
CONTROL 88
122
71
109-114,
DATA (16-23) DATA (16-23)
116,117
TS DATA
DATA 131
CLOCK
130
SW
ENABLE
132
SYNC 133
CABLE CARD
INTERFACE
DT04
PARALLEL
63-65,
TO SERIAL 68,69,
CONVERTER 72,73,78
SERIAL TO
37,38,
PARALLEL 41-44,
46,47
CONVERTER
CABLE
CARD
89-92,
95-102, ADDRESS (0-13)
CH MAP INFORMATION
118,119
INTERFACE
79-83,
DATA (0-7)
86-88
+3.3V
CARD DETECT1 (L) 29
CARD DETECT2 (L)
30
133MHz CS3
CLOCK
124 144
DIGITAL TUNER BLOCK DIAGRAM (1/2)
PT-56DLX75 / PT-61DLX75
PT-56DLX75/PT-61DLX75