Aiwa FR-A270 Service Manual page 16

IC BLOCK DIAGRAM-1/1
IC, KA22426D
IC, LM8562
IC, LM8560N
AF RIPPLE
GND OUT VCC FILTER
27 26 25 24 23
AF POWER AMP
1 2 3 4
FM NF AM
MUTE VOL
DISCRI OSC
50/60 SEL
MODE
T
12/24 SEL
SELECT
SPEED/ TEST
POWER
T POWER DOWN
DOWN
TONE1 TONE2
CR OSC
OSC CTR
OSC
STOP
50/60Hz
GATE
INPUT
STANDBY
DET
RT-TIME DIMMER
SET/
T RT-SET
DIMMER
SETCK S
TIME SET
T
INPUT
U/D S
2Hz
RESET S
SEO DISP
ALM-DISP
T
T.DISP
SELECT
AL1.DISP
SLEEP/ AL2.DISP
T
SNOOZE
SL.DISP
ON
ON/OFF
T
INPUT
OFF
T
THREE INPUT
CIRCUIT
12/24 SELECT
50/60 SELECT
CR INPUT OSC CTR
GATE
TONE
50/60 INPUT
STANDBY DET
50/60Hz
MIN SET
D
HOUR SET
D
TIME & S.SAMPLE
SEC RSTYHLD
T.RST
AL.RST
PWR UP
ALARM
DISPLAY D
SEC DISP
T.DISP
SEC
DISPLAY
AL..DISP
SL.DISP
SLEEP
D
INPUT
SNOOZE
D
INPUT
ALARM D
OFF
AF DET AFC AFC IF
IN OUT AGC AGC GND METER
22 21 20 19 18
AM IF AGC
TUNING METER
AM FE
FM
DISCRIMINATOR
FM FE
5 6 7 8 9 10
AFC FM REG FM AM
OSC OUT RF RF IN
INNER
OSC
GATE 1/25 or 1/30 1/2
2Hz
SYSTEM CLOCKS
TIME SET
SEC CTR GATE
RESET
SET CK
TIME CTR
U/D
RESET
COMPARATOR
SET CK
ALARM1 CTR
U/D
RESET
SET CK
ALARM2 CTR
U/D
RESET
SLEEP SNOOZE
CTR CTR
RESET
CONTROL CONTROL
OUTPUT
CONTROL
1Hz
1/25 or 1/30 1/2
50/60Hz 2Hz
T.DISP & S.SAMPLE
SEC CTR
GATE
S.SAMPLE
F.SAMPLE
TIME TIME
MIN CTR
HR CTR
2Hz
TIME &
F.SAMPLE
COMPARATOR
ALARM ALARM
MIN CTR HR CTR
TIME & ALARM &
F.SAMPLE F.SAMPLE
SLEEP
PWR
CTR
UP
CONTROL
OUTPUT
CONTROL
TONE
-16-
FM/AM
BAND
FM AM
SELECT
NC IF IN IF IN
17 16 15 14
FM IF
11 12 13 14
NC FM FE FM/AM
RF IN RF IN FE OUT
RESET
1Hz
PF. BLANK
DET FLASH
SEC
TIME
ALARM1
ALARM2
SLEEP
ALM1-OUTPUT
ALM2-OUTPUT
RADIO-OUTPUT
50/60Hz
PF.
BLANK &
DET
FLASH
SEC
TIME
SEGMENT
OUTPUTS
ALARM
SLEEP
SLEEP
OUTPUT
ALARM
OUTPUT