1-2. IC BLOCK DIAGRAM
— 3 —
IC2 TA2111F-(EL)
Note on Schematic Diagram:
• 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
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
C
: panel designation.
•
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 M
Ω
).
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
Note:
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
VOLT/DIV : 1 V AC
TIME/DIV : 50nsec
VOLT/DIV : 1 V AC
TIME/DIV : 0.2msec
VOLT/DIV : 0.2 V AC
TIME/DIV : 0.5msec
PLAY MODE
ESP : OFF
VOLT/DIV : 1 V AC
TIME/DIV : 0.2
µ
sec
ESP : OFF
VOLT/DIV : 1 V AC
TIME/DIV : 20
µ
sec
ESP : OFF
VOLT/DIV : 1 V AC
TIME/DIV : 50
µ
sec
SERVICE MODE
during TRK servo OFF
VOLT/DIV : 1 V AC
TIME/DIV : 0.1msec
1
IC502
&ª
2
IC502
#§
3
IC502
^•
4
IC502
&º
4.2MHz
7.335kHz
44.008kHz
2.11237MHz
2.4Vp-p
2.6Vp-p
2.6Vp-p
2.5Vp-p
5
IC301
!§
6
IC801
@º
7
IC501
@£
16.9 MHz
2.3Vp-p
4.19 MHz
3.0Vp-p
0.85–1.15Vp-p
• Waveform
— 4 —
— 5 —
— 6 —
1-1. BLOCK DIAGRAMS – TUNER SECTION –
34
AM/FM
OSC
B.P.F
FL1
FM RF
L1
FM OSC
L2
AM IFT
T1
ANTTENA
AM FERRITE-ROD
L3
L3
MW OSC
L4
L.P.F
Q26-28
CONVERTER
DC/DC
T81,Q30-32
D3
V IN
1
FM IF
L OUT
7
IF/RF AMP
IC2
FM /AM
450kHz
CF2
14
R OUT 13
FM IF
2
1
LINE AMP
IC3
R-CH
3
10k
9k
2
1
REG
IC7
25
FM ANT
TU L
31
49
35
LIQUID CRYSTAL
DISPLAY
COM0-3
LCD0-14
IC4
EEPROM
3
4
1
2
14
5
3
CS
DI/DO
SK
DO
CS
DI
SK
24
X1
75kHz
XIN
XOUT
IC1
DTS
µ
COM
16
: FM
AM IF
BUFFER
FM
LOCAL/DX
Q11
S20
DX
LOCAL
T U +B
Q12,25
REG
Q19,29,33
+B
SWITCH
Q18,20
TU +B
IC3 +B
SW EN2
V IN
V CPU+
23 FM RF
24 AM RF
21 FM OSC
20 AM OSC
AM/FM
MIX
4
8
10.7MHz
CF1
AM IF
Q40,41
FM/AM
IF AMP
Q44
AM IF
Q42
ST IND
11
Q42
Q43
Q50
FM IF
Q51
QUAD 12
10.7MHz
X1
AM/FM
SWITCH
Q15,16
LPF2
AM/XFM
16
IF ON
CONT
Q45,49
3
4
9
2
10
5
6
13
12
8
1
11
IC5
IC5
Q48
2
4
1
Q48
IC6
XAVLS/HOLD
SWITCH
Q38
Q47
RADIO
BAND
S10
FUNCTION
KEY
S11-18
DBB/
XOFF
Q21,22
VCPU
STEP
S19
STEP
TU VCPU
21
VCO H
20
VCO L
53
XST
4
XAM CTL
19
EQ
• Signal Path
• R-CH is omitted
7
XIF REQ
17
AM/FM IFC
56
BB1O/SDI
55
BB2O/SCKI
13
KEY/RMKEY
10
XA
VLS/XHOLD
9
A
VLS/XHOLD
51
REKEY INT
6
L/O SW
54
XL/O TUREQ
16
TUNER SW
15
XDCDT
12
HIDC/BA
TT
8
TUON/CD
WP
52
TU BEEP
11
CDON
2
MUTE
1
A
CK CD
50
CE CD
XL/O
TU XAVLS
TU XHOLD
WP-XTU/AM/FM
XDCDT
TU HIDC/BATT
TU ON/CDWP
TU BEEP
CDON
TU MUTE
ACK CD
CE CD
SDI
TU REQ
SCK
RMKEY
TU GROOVE
KEY
TU XBASS
TO (2/2)
CD SECTION
*
V IN
VCPU+
SW EN2
VCPU
LCD1
RMKEY INT
*
Refer To Service Manual
(9-924-438-11)
AM TRACKING
FM TRACKING
AM TUNING
VOLTAGE
FM TUNING
VOLTAGE
FM IN
RF GND
AGC
GND2
TU-IND
ST
-IND
QUAD
1
2
AM L/CUT
AM/FM MIX
3
4
5
VCC2
AM IF
FM IF
6
7
8
9
10
11
12
LPF1 M/XST
L-OUT
R-OUT
13
14
15
AM OSC
FM OSC
RF VCC
FM RF
AM IN
20
21
22
23
24
DET OUT
AFC
18
19
LPF2 AM/XFM
MPX IN
16
17
FM
IF
FM
RF
FM
IF
AM
IF
AF
FM DET
LEVEL
DET
ST/MO
FM/AM
TUNE
LED
FM
MUTE
ST
LED
AM DET
FM OSC
AM OSC
FM MIX
AM MIX
AGC
VCO
DIVIDE
DECODE