Sony MZ-R55 - Block Diagram - System Control Section

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MZ-R55
6-4. BLOCK DIAGRAM — SYSTEM CONTROL SECTION —
13
45
44
42
57
WP XPCONT1
LCD SCK
LCD DATA
LCD STB
KEY1
56
KEY2
55
KEY3
32
XREC LED
36
XLCD ON
21
HOLD
22
SYNC REC
23
DBB
25
AVLS
14
OPEN
15
CLOCK
18
TMARK
19
REC
38
MRST
41
EXTAL
40
XTAL
54
TEMP
30
X2V CONT
31
XNIMH DET
92
GND SW
100
NIMH CHG
35
CHG CONT
73
CHG MNT
46
LCD
MODULE
WITH
SWITCH
UNIT
KEYRMC
AUDIO
SECTION
B
POWER
SWITCH
Q801
RVCC
(+2.8V)
S808
AVLS
S805
REC
S802
OPEN
S804
T MARK
S803
CLOCK
SET
S806
HOLD
NORM
LIMIT
S809
DIGITAL
MEGA BASS
S807
SYNCHRO
REC
OFF
ON
OFF
HOLD
S801
DOOR
OPEN
RVCC
(+2.8V)
RESET
IC804
3
TEMP
METER
IC803
4
X801
12MHz
S901
(BATTERY IN)
1
5
2
7
CHARGE
CONTROL
IC901
4
3
1
5
DC/DC CONVERTER
IC903
CHARGE
CONTROL
Q902
3V
Q901
Q903
PWM
COMP
RVCC
(+2.8V)
4
3
1
5
DC/DC CONVERTER
IC902
PWM
COMP
PWM
COMP
ON/OFF
DRIVE
Q904
(
1/2
)
2.7V REG
Q908, 909
ON/OFF
DRIVE
Q904
(
2/2
)
2V REG
Q907, 909
ON/OFF
DRIVE
Q802
2.8V REG
IC807
2.7V
RV901
2.65V
2V
D802
3V
3V
2 3 2
3
3V 3V
RVCC
(+2.8V)
DC/DC CONVERTER
IC806
SYSTEM CONTROL
IC802
(
3/3
)
DC IN 3V
RECHAGEABLE
BATTERY
NH-14WM
1.2V 1400mAh
3V
J901
(CHARGE)
Q906
04
FILTER
LF901
(Page 27)