Sony Walkman WM-FX488, Руководство по обслуживанию

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15
WM-FX488
4-7. IC BLOCK DIAGRAMS
IC1 TA2154FN (EL)
IC301 TA2160FN (EL)
12 13 14
19
15
FM/TV
MIX
8 9 10
TV RF IN
VCC
FM IF IN
AM IF IN
QUAD
DET OUT
MPX IN
LPF IN R OUT
GND
1 4 2 3 5 6
FM FR IN
RF GND
FM MIX
AM MIX
AGC
7
AM
MIX
SW
FM/AM/TV
PW SW
1/2
FM
OSC
TV
OSC
1/8 OR
1/16
AM
DET
LEVEL
DET
FM MPX
FM
DET
AM
OSC
AGC
18 17
16
20
TV FM OSC AM RF IN
OSC OUT
TV RF OUT FM RF OUT AM BYPASS AM OSC MODE2 MODE1 IF REQ IF COUNT LPF2B LPF2A L OUT RFVCC
30 29 27 28 23
24
25 26 22 21
11
BUFF
IF BUFF
BUFF
BUFF
FM IF
AM IF
AF
TV RF
FM RF
12
13 14
19
15 8 9 10
PRE OUT B
BST SW
PW INA
PW NFB
PW INB
PW MUTE
PRE MUTE
AGC DET
PW GND
PW NFA
1 4
2 3 5 6
PRE NFB PRE NFA
PRE OUT A
VREF
PRE GND
7
RF & REF
BST SW
AGC DET
AGC
18 17
16
20
LPF
VREF IN BSF NF IN B
IN A
RF IN
BASE BST OUT PW INC AGC IN OUT A OUT C OUT B VCC RF OUT
30 29 27 28 23 24 25 26 22 21
11
PRE B
PRE A
BST
PW A PW B
PW C