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MZ-R70
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04
TO PB
SECTION
B
OE
TO REC/AMP
SECTION
D
RMC KEY
TO REC/AMP
SECTION
C
SWDT
SCLK
REC
SW & LCD
MODULE UNIT
PAUSE
SYSTEM CONTROLLER
IC801 (3/3)
88
83
85
39
40
64
37
78
84
66
REC KEY
VC +B
WK DET
RMC KEY
FF CLR
SLEEP
REG CTL PWM
CLK
VBAKN
HALF LOCK SW
VC PWM
65
VPM PWM
58
SERON
43
XRST
45
XTAL VLD +B
46
EXTAL
80
VB MON
81
CHG MON
42
GND SW
90
HI DC MON
59
XCHG
89
VRM MON
35
XWK1
33
XWK3
37
FLCLR
36
SLEEP
43
CLK
38
VSTB
32
XWK4
24
RF1
23
RF2
15
SERON
40
XRST
RF3
BATT +B
VR +B
VG +B
11 12
44
5
1
34
XWK2
4
PAUSE KEY
86
SET KEY1
87
SET KEY2
22
LCD RST
21
LCD STB
20
XCS LCD
1
SYNC REC BATT +B
KEY IN
MATRIX
LCD
DRIVER
X801
16.934MHz
LCD
ON
OFF
S807
SYNCHRO REC
73
XHOLD SW
56
T MARK
OFF
HOLD
S804
HOLD
S803
T MARK
60
X TEST
BP801
(TEST)
3
PROTECT
S806
PROTECT
DETECT
50
OPEN/CLOSE SW
S801
OPEN/CLOSE
DETECT
VR +B
POWER
CONT
VREG +B
10
8
CHG B
47
POWER
CONT
POWER
CONT
Q901 (2/2)
2.5V
REG
VR
26
DC/DC
CONV
L2
VB
BATM
4
RF5
48
CHG SW
2
RS
DC IN
S802
OPEN
1
5
2
IC902
Q901(1/2)
RECHARGEABLE
BATTERY
GROUND LINE
SWITCHING
Q902
17
DC/DC
CONV
SWVG
28
DC/DC
CONV
31
POWER
CONT
POWER CONTROL
IC901
DC IN 3V
J901
30
XWKI
6-3. BLOCK DIAGRAM — POWER SUPPLY SECTION —
(Page 25)
(Page 28)
(Page 28)
1
IC501
rs
(FE), IC502
ij
(FE)
2
IC501
ed
(RF), IC502
uk
(RFI)
Approx.
1.4Vp-p
3
IC502
w;
(OSCO)
1.9Vp-p
• Waveforms
44.3ns
400mV/div, 20ns/div
0.5V/div, 0.2µs/div (PB)
50mV/div, lµs/div (PB)
Approx.
1.4Vp-p