Block Diagram - Tuner Section; Ic Block Diagram - Sony D-F181 Service Manual

Q Q
7
3
1-1. BLOCK DIAGRAMS – TUNER SECTION –
B.P.F
1 FM IF
FL1
L3
AM/FM
23 FM RF
AM FERRITE-ROD
FM TRACKING MIX
L1
ANTTENA
T U +B FM RF
DX Q11
S20 24 AM RF
FM
LOCAL
LOCAL/DX
L3
FM TUNING
AM TRACKING VOLTAGE
D3
L2
FM OSC
L4 21 FM OSC
MW OSC
20 AM OSC
AM TUNING QUAD 12
VOLTAGE
Q12,25
V IN AM/FM
OSC
LPF2
DC/DC AM/XFM
REG
3 2 CONVERTER
V CPU+ 11
IC7
L.P.F
T81,Q30-32
1 Q26-28
Q19,29,33
V IN REG TU +B
Q18,20
+B
IC3 +B
SWITCH T E
L 1 3 9
SW EN2
19 21 20 53
• R-CH is omitted
• Signal Path
: FM
w w w
COM0-3 LCD0-14
16
31 34 35 49 14 5 3
3 4 1 2
LCD1
LIQUID CRYSTAL
IC4
DISPLAY
EEPROM
— 3 —
1 5 1
6 3
IC3
IC2 LINE AMP
FM /AM
2 1
IF/RF AMP L OUT 14
Q21,22
CF1 DBB/
10.7MHz XOFF
4 8
FM IF
R OUT 13 R-CH
T1
AM IFT
CF2
450kHz
7
AM IF VCPU
10k
AM IF
Q40,41
Q42 Q42 9k
AM IF
BUFFER
S19
STEP
Q44
FM/AM
Q50
IF AMP
Q43
X1
10.7MHz FM IF
Q15,16
Q51
AM/FM
16
SWITCH IC5 IC5
Q45,49
IF ON
3 4
CONT
5
8 9
6
1 2
13
11 10
Q48 Q48
12
4 2 2 9 6 5 1 3
IC6
1
4
Q38
XAVLS/HOLD
SWITCH
Q47
RADIO
4 7 17 56 55 13 10 9 51 6 54 16 15 12 8 52
IC1
DTS µCOM
x a o
y
25 24
. i
X1
75kHz
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1-2. IC BLOCK DIAGRAM

FM ANT IC2 TA2111F-(EL)
TU L
STEP
V IN
FM OSC
VCPU
AM OSC
VCPU+
FM MIX
SW EN2 AM MIX
FM
RF
TU VCPU
TU XBASS
TU GROOVE
TO (2/2)
KEY
RMKEY
CD SECTION
*
RMKEY INT
Q Q
SDI
3 7 6
SCK
TU REQ
2 XL/O
TU XAVLS
TU XHOLD
WP-XTU/AM/FM
S11-18
S10
FUNCTION
BAND KEY
XDCDT
TU HIDC/BATT
TU ON/CDWP
TU BEEP
CDON
TU MUTE
ACK CD
CE CD
11 2 1 50
* Refer To Service Manual
(9-924-438-11)
u 1 6 3
http://www.xiaoyu163.com
2 4
8 9 9
• Waveform
1
IC502 &ª SERVICE MODE
during TRK servo OFF
AF 4.2MHz
FM
IF DECODE
2
VCO IC502 #§
DIVIDE
FM
MUTE
LEVEL ST/MO
AM DET FM DET
DET FM/AM
AM FM
AGC
IF IF
TUNE ST 7.335kHz
LED LED
3
IC502 ^•
44.008kHz
3 1 5 1 5 0 8 9
4
IC502 &º
m
c o
.
— 5 —
2
8 9 9
5
IC301 !§
2.3Vp-p
2.4Vp-p
16.9 MHz
VOLT/DIV : 1 V AC VOLT/DIV : 1 V AC
TIME/DIV : 50nsec
TIME/DIV : 0.1msec
6
IC801 @º
ESP : OFF
2.6Vp-p 3.0Vp-p
4.19 MHz
VOLT/DIV : 1 V AC
VOLT/DIV : 1 V AC
TIME/DIV : 0.2msec
TIME/DIV : 50µsec
7
IC501 @£
ESP : OFF PLAY MODE
2.6Vp-p
0.85–1.15Vp-p
VOLT/DIV : 1 V AC VOLT/DIV : 0.2 V AC
2 4 9 8 2 9 9
TIME/DIV : 20µsec TIME/DIV : 0.5msec
ESP : OFF
Note on Schematic Diagram:
2.5Vp-p
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1 / W or less unless otherwise
4
2.11237MHz
specified.
VOLT/DIV : 1 V AC
• ¢ : internal component.
TIME/DIV : 0.2µsec
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
une marque ! sont critiques
fied by mark ! or dotted
line with mark ! are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce por tant le numéro
number specified. spécifié.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack.
• Voltages and waveforms are dc with respect to ground in
service mode.
no mark : CD PLAY OR COMMON
( ) : FM
< > : AM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f : AM
J : CD
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