Diagrams; Block Diagram (1) - Sony FDL-PT222 Service Manual

4-1. BLOCK DIAGRAM (1)

BALUN
T101
STRAP
ANTENNA
J101
EXT ANT
IF
ANT
IF AMP
IF
Q201
UB
TU101
AGC
TUNER
HB
SWITCH
Q010-012
LB
+4.5V
MB
BUFFER
TU
Q001
RV001
CHANNEL DISPLAY
POSITION CH13
RV002
CHANNEL DISPLAY
POSITION CH1
V LOW
RV004
CHANNEL DISPLAY
POSITION CH12 V HI
T1 (TUNER, VIF/SIF DET)
SECTION 4

DIAGRAMS

IF
IC001
TUNER CONTROOL
BS
BS
28
COMPOSITION
TUNING
CONTROL
U/V BAND
27
SELECT
BAND
SELECT
AUTO
RETURN
CHARGE/
BT
AMP BT INITIAL
26 DISCHARGE
Q002 GEN. SET
CIRCUIT
UP
18
BAR
DISPLAY
UA POSITION
22
ADJUST
20 VLP
19 VHP
23 VHA
24 VLA
– 9 –
IF
IF
6
FILTER
IF
SWF201
7
IF
AGC OUT
3
AGC DL
3 RV201 4
RF AGC
DEF
DEFEAT
14
OUTPUT
FH E-VDL
SIGNAL FH SWITCH INV.
1 14
DEFECT Q005 Q205
FM DET
15
LIM
16
CF202
H SYNC SYNC
4 23
AFC AFT
COMPARATOR 5 17
Q007
AFC SWITCH
AFT
AFT COIL
21
SUD
6
CS
INV., SWITCH
10
Q003,004
BAR V
30
OUTPUT
U
31
CN201
12
2
3
IC201 VIF/SIF DET
IF AMP
LLD
REF COIL
19
VIDEO
AGC IF REF COIL
DET
20
AUDIO
AUDIO
BUFFER 13 5
FM
DET
AUDIO
SIF
LIMITER 10
SYNC
CF203
SEP
AUDIO
VIDEO
DET OUT
VIDEO BUFFER
AFT 18 9
AMP Q202
SYNC SEP
22
CF201
7
8
11 UP DOWN SW
– 10 –
UB
VHF
H.P
AUDIO
TO
A BOARD
CN502
VIDEO
H SYNC
IND