6-1.
BLOCK DIAGRAMS
– TUNER SECTION – (US, CND, E, AR, MX, AUS MODELS)
TM1
ANTENNA
FM 75
Ω
AM
ANT IN
IF OUT
F OUT
VT
FE1
FM FRONT END
ST +10V
IF AMP
Q1,2
IF AMP
Q3,4
CF1
10.7MHz
CF2
10.7MHz
1
FM IN
4
27
REG
29 AM OSC
AM RF IN
FM OSC
RV41
FM
TUNED
LEVEL
3
4
5
6
30
14 15 11
FM SD
AM / FM
VCO STOP
IF BUFF MUTE
23
9
5
13
12
2
AM
SD
AM
SD
AM MIX
AM IF
IFT41
X43
450KHz
X41
456KHz
X42
10.7MHz
TUNED
LEVEL
AM
RV42
AMP IN L
AMP OUT L
MPX IN
OUT L
OUT R
AM / FM
8
7
ST LED
TUNED
STEREO
TUNED
LPF
RCH
FM / AM MPX
IC2
24
22
20
21
18
16
14
7
2 12 8
1 24
AM OSC
FM
VCO STOP
IF
IF REQ
X IN
X OUT
CE
DI
CL
DO
MUTE
ST-CE
COM-DIN
COM-CLK
COM-DATA
B
A
MAIN SECTION
(page 47)
PLL
IC1
FE2
AM FRONTEND
Q5
3
7
9
13
14
ANT IN
B+
F OUT
RF OUT
VT
X21
4.5MHz
•
R CH:Same as L CH
•
SIGNAL PATH
:FM
:AM
•
Abbreviation
CND :Canadian model
AUS :Australian model
AR
:Argentine model
MX
:Mexican model
AM IF
DET
VCO
MAIN
SECTION
(page 48)
66
65
67
68
70
72
69
HCD-D690/XB6/XB600
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