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CFS-B5LMK2
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5-2. CIRCUIT BOARDS LOCATION
SECOND board
ISS board
MICROPHONE board
SUPPORT board
TUNER board
AC board
BATTERY board
AUDIO board
• IC Block Diagram
IC1 CXA1538S
30 29
4
3
2
1
28 27
26 25 24 23 22 21
20
19 18
17
16
VCO
MPX REG.
REG
FM FRONT-END
AM FRONT-END
1/2
COUNTER
1/2
COUNTER
5
6
7
8
9
10 11
12
13 14 15
MONO/ST
SELECT
DECORD AMP
RIPPLE
FILTER
MUTING
PD 1
PD 2
AUTOBLEND
BAND PASS
MUTE
TUNING
INDICATOR
AM
IF/DET
FM IF/
DISCRI
GND
PLL LPF2
MPX REG
VCO
MUTE
AM OSC
AFC
FM OSC
REG OUT
FM RF
AM RF IN
FM RF IN
FE GND
FM/AM
FE OUT
FM
DISCRI
BAND SELECT
AM IF IN
FM IF IN
TUNED IND
GND
AFC/AGC 2
AFC/AGC 1
VCC
LCH OUT
RCH OUT
PLL LPF 1
PILOT DET
LPF 1
PILOT DET
LPF 2
ST IND/
VCC CHECK
RIPPLE
FILTER
5-3. PRINTED WIRING BOARD — TUNER SECTION —
Note:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
D1
B-5
D2
B-5
D3
B-2
IC1
C-3
Q1
B-2
Q2
D-4
• Semiconductor
Location
Ref. No.
Location
(Page 17)
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