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22
CDX-F7700/F7705X
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
FL VDD+5V
T620
DC-DC
CONVERTER
IC620
D623,624
D620,621
D622
FL+4.3V
FL+1V
FL+55V
ILL+B
BATT
X301
32.768kHz
DISPLAY CONTROL
IC901
FL900
FLUORESCENT
INDICATOR
TUBE
GCP
ILL+B
BATT
X302
6MHz
S301
RESET
ILL+B
IR
LED901,910-914
LSW901-908
LED931,932
REMOTE CONTROL
SIGNAL RECEIVER
IC903
BU+5V
RESET
KEY MATRIX
S901-910,912
LSW901-908
ENC901(2/2)
SYSTEM CONTROL
IC303 (3/3)
ROTARY
ENCODER
ENC901(1/2)
S300
(NOSE DET)
RESET
IC302
CNJ101
(REMOTE IN)
POWER
CONTROL
Q601,602
6
5
4
12
13
7
11
+5V REG
D911
POWER
CONTROL
Q914,916
POWER
CONTROL
Q623,Q624
ON/OFF
DRIVE
Q620
DC-DC
CONVERTER
CONTROL
Q623,624
+5V REG
Q915
(Page 21)