Ic Block Diagrams; Jack Board - Sony D-NF420 Service Manual

• IC Block Diagrams

– JACK Board –
IC101 TB2132FNG
30 29
TV
RF
FM
RF
1 2
IC201 TB2173FTG
BEEP OUTA 1
OUTA 2
OUTC 3
PW GND 4
OUTB 5
BEEP OUTB 6
VCC2 7
BST TC 8
AGC DET 9
AGC IN 10
BST OUT 11
28 27 26 25
OSC
AM AM
MIX OSC
1/2 AM
TV 1/8
1/4
BUFFER
1/16
FM 1/32
FM/TV 1/2
FM/TV
MIX
AGC
3 4
44 43
PORT
+
–
+
–
12 13 14
24
AM OSCIN
PROGRAM
COUNTER
FM OSCIN
IFIN PLL
1/8
FM/AM/TV
SWITCH
AM FM
IF
FM
BUFFER
DET
AM
DET
FM AM
AF
IF IF
5 6 7 8 9
42 41 40 39 38 37 36 35
VOLUME/SWITCH MODE
/PORT CONTORL SWITCH
VOLUME
–
+
+
–
VOLUME
ATTENUATOR
ATTENUATOR
BIAS BEEP
15 16 17 18 19 20
D-NF420/NF421
23 22 21 20 19 18 17 16
PHASE
COMPARATOR
REFERENCE
DIVIDER
FM MPX
MUTE
10 11 12 13 14 15
34
33 C-SW
32 GND
31 IN2A
30 VOL OUTA
29 PRE INA
28 PRE INB
27 VOL OUTB
26 IN2B
25 IN1A
24 IN1B
23 PRE GND
21 22
19