Diagrams; Block Diagram - Tuner Section - Sony HCD-EP50 Service Manual

6-1. BLOCK DIAGRAM – TUNER Section –
(EXCEPT AEP, UK, Chinese)
FM RF AMP/MIX/OSC
IC901
FM RF
IN
B. P. F. FM RF
1 FM MIX
BPF901
AMP
FM OSC
15 13
L902
FM RF
FM OSC
TC901
BUFFER
L902, TC901
D905 D906
Q901
FM TRACKING
CN13
(AEP, UK, Chinese)
U4
FM ANT
FM FRONT-END
75Ω
COAXIAL
1 7
8
5
T6
CN12 AM RF
AM ANT
D5
T8
TC1
AM OSC
T6, TC1
AM TRACKING AM FREQUENCY
COVERAGE
FM/AM PLL
U2
14
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: FM
: AM
SECTION 6

DIAGRAMS

T901
MIX FM IFT
OUT
3
L901
FM OSC
L901
FM FREQUENCY
COVERAGE
CF5 CF3
CF2
10.7MHz 10.7MHz 10.7MHz
FM IF AMP
Q2
CF4
AM-RF
AM-MIX
450kHz
-IN AM AM
27 2
RF AMP MIX
T1
AM-OSC AM
AM IF
29
OSC
30
T8
L. P. F
13 18
1/2
SWALLOW
COUNTER
SHIFT REGISTER & LATCH
(AEP, UK)
MUX
BUFFER
4
Q5
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
U1
FM-DET
FM-IN OUT MPX-IN
FM L. P. F.
1 FM IF 23 22
DET T4
24
AM-DET OUT
AGC
AM-IF
4 AM IF DET
9
T5
FM DET
X2
7.2MHz
17 16 1 20
REFERENCE
PHASE PHASE
DIVIDER
DETECTOR/ DETECTOR/
CHARGE PUMP CHARGE PUMP
12 BIT
UNLOCK
PROGRAMMABLE
DETECT
DIVIDER
15 15
X304
4.332MHz
RDS DECODER
IC305
13 14
PLL
OSC CLOCK
1187.5Hz
ANTI-ALIASING PLL 57kHz BIPHASE
COMPARATOR
FILTER RDS/ARI DECODER
AMP-
OUT L IN L
L. P. F.
21 19
T2
DECODER
OUT R
20 R-CH
MUTING
AM/FM
IF BUFFER
13 14 15 6
FM/AM BAND STEREO/MONO
SELECT SWITCH SWITCHING
Q3 Q17
11 10 6
DI
3
CL
4
CCB
CE
INTERFACE
2
DO
5
UNIVERSAL
COUNTER
HCD-EP50
Ver 1.1
RCLK RCLK
A (Page 18)
16
DEFERENTIAL RDAT RDATA
2
DECODER
AMP-
OUT L TU-L
B (Page 17)
17
TU-R
R-CH
7
ST/BEAT
C
(Page 16)
FM ON/OFF
D (Page 18)
STEREO
STATION
DA IN
CLOCK
PLL CE
DA OUT
E
(Page 17)