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6-2.
BLOCK DIAGRAM – POWER SUPPLY Section –
LD1, LD2
LD1
(Page 15)
A
LD2
VCPU
Q409, 410
AUTOMATIC
INM1
POWER CONTROL
8
–
SWITCH
INP1
+
9
VCPU VOLTAGE
VCPU
MONITOR
RF1
Q417
7
Q410
BATT B+
Q411
DTC1
11
SWITCHING
VCPU
(Suffix -12)
Q409
CMP1
SYSTEM CONTROLLER
10
RIPPLE
DC/DC CONVERTER
IC801 (2/2)
Q454
DTC3
VCPU
FILTER
MUTE SWITCH
6
DC/DC CONVERTER
Q451
Q452
MUTE SWITCH
DDCMUTE
2
VCC
(Suffix -11)
RV401
VCC
DPCON
3
INP2
ERROR
5
AMP
(Suffix -12)
VCPU
VREF
VCPU
20
REGULATOR
AVDD
B+ SWITCH
D/A CONVERTER (IC301) B+
Q303
PCB
PCON 27
17
CHGON
CHGON 11
18
SYSTEM
CKOUT
CONTROL
(Suffix -11)
15
SYNC
D806
16
RSTB
LOW VCPU
RESET 20
14
DETECT
CHGOUT
CHGMNT1 59
31
CHGMNT2 61
23 VG
DC IN
2
DCDTB
DETECT
VCCMNT
5
VCC
BATMNT 58
BATT B+
DCINMNT 57
CLK
B
(Page 15)
176K
E
(Page 18)
(Suffix -12)
VG
C
(Page 15)
DCDTB
D
(Page 18)
05
– 19 –
AUTOMATIC POWER
SWITCHING
CONTROL
REGULATOR
Q406
Q408
POWER CONTROL
Q407
IC401
AUTOMATIC POWER
CONTROL SWITCH
UPCK1B
25
PWM
4
UPCK1
24
PWM
VOUT1
BATT B+
26
1
MOTOR/COIL DRIVER (IC504),
HEADPHONE AMP (IC302) B+
DC/DC
RECTIFIER
CONVERTER
Q405
T401
CHARGE
RECHARGEABLE
BATTERY
NH-DM2AA
OSC
2PCS. 2.4V
Q403
D407
PWM
VOUT2
29
2
Q453
DC/DC CONVERTER
DRY BATTERY
MUTE SWITCH
SIZE "AA"
(IEC DESIGNATION LR6)
(Suffix -12)
CHARGE
2PCS. 3V
VREF
ERROR
RF3
SWITCH
35
AMP
Q402, 414
J401
DCIN
34
DC IN 4.5V
D415
–
+
CHARGE
RS
1
SWITCH
Q401
CHGSW
33
VCPU
BATM
32
CHARGE
VIN
AMP
30
SW
STEP UP
21
DC/DC
VDD
REGULATOR
CONVERTER
22
IC402
D411
D404
A/D
1
CHARGE
4
MONITOR
3
IC403
– 20 –
6-3.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC801 (SYSTEM CONTROLLER)
MC68HC05L24-SC440482CFU (SUFFIX-11), MC68HC05L24-SC440488CFU (SUFFIX-12)
Pin No.
Pin Name
I/O
Description
1
VDD
—
Power supply terminal (+3V)
2
DDCMUTE
O
DC/DC converter muting control signal output terminal
3
DPCON
O
DC/DC converter on/off selection signal output terminal
4
OE
O
Output enable signal output to the MPC17A51VMEL (IC504) "L" active
5
VCCMNT
I
Main DC/DC converter voltage (+2.75V) monitor input (A/D input)
6
MDL SL
I
Destination setting terminal Fixed at "H" in this set
Back light control signal output to the liquid crystal display on the switch unit
7
LIGHT
O
"H": back light on
8
C2PO FILTER
O
C2PO (error condition monitor) filter on/off control signal output terminal
9
DACLT
O
Serial data latch pulse signal output to the D/A converter (IC301)
C2PO (error condition monitor) signal control output terminal
10
C2POEN
O
"L": stop mode, "H": searching
11
CHGON
O
Charging on output to the MPC18A26VMEL (IC401) "L": charge on
12
RMDAT
I/O
Communication data in/out for the liquid crystal display with remote commander
13
VLCD3
O
14
VLCD2
O
Power supply output for the liquid crystal display bias
15
VLCD1
O
16
VSS
—
Ground terminal
17
VPP
—
Power supply terminal (0V)
18
TON
O
Traverse on/off control signal output to the auto traverse circuit
19
XOSC2
O
Standby control signal output to the headphone amplifier (IC302)
System reset signal input from the MPC18A26VMEL (IC401) "L": reset
20
RESET
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
21
OSC1
I
Main system clock input terminal (4.195 MHz)
22
OSC2
O
Main system clock output terminal (4.195 MHz)
23
SUBQ
I
Sub-code Q data signal input from the BU9326KS (IC502)
24
CDATA
O
Serial data output to the D/A converter (IC301) and BU9326KS (IC502)
Sub-code Q data reading clock signal output to the D/A converter (IC301) and BU9326KS
25
SQCK
O
(IC502)
Data read/write selection signal output to the BU9326KS (IC502)
26
RW
O
"L": reading mode, "H": writing mode
Power on/off control signal output to the MPC18A26VMEL (IC401)
27
PCON
O
"L": power on, "H": power off
28
AMUTE
O
Analog muting on/off control signal output terminal "H": muting on
AVLS (Automatic Volume Limiter System) switch (S301) input terminal
29
XAVLS
I
"L": limit mode, "H": normal mode
System reset signal output to the BU9326KS (IC502) and D-RAM controller (IC601)
30
XRST
O
"L": reset
31
XHOLD
I
HOLD switch (S804) input terminal "L": hold on, "H": hold off
Rechargeable battery pack detection switch input terminal "L": rechargeable battery pack in
32
XRCHG
I
Not used (open)
Sled limit-in detection switch (S901) input terminal
33
XLMT
I
The optical pick-up is inner position when "L"
34
XRSM
I
RESUME switch (S803) input terminal "L": resume on, "H": resume off
CD door open/close detection switch (S801) input terminal
35
OPEN
I
The stop status is reset with the falling edge of input signal
– 21 –
Pin No.
Pin Name
I/O
Description
Wake-up control signal input terminal
36
WP
I
The stop status is reset with the falling edge of input signal
37
XLT
O
Serial data latch pulse signal output to the D-RAM controller (IC601) (for ESP)
38
XSOE
O
Serial data output enable signal output terminal (for ESP) Not used (pull up)
39
SDTO
I
Serial data input from the D-RAM controller (IC601) (for ESP)
40
SDTI
O
Serial data output to the D-RAM controller (IC601) (for ESP)
41
SCK
O
Serial data transfer clock signal output to the D-RAM controller (IC601) (for ESP)
42
FOK
I
Focus OK signal input from the RF amplifier (IC501) "L": NG, "H": OK
43
BUSY
I
Busy signal input from the BU9326KS (IC502) "L": track jump mode, "H": servo loop on
44
BEEP
O
Beep sound output to the headphone amplifier (IC302)
45
SCOR
I
Sub-code sync (S0+S1) detection signal input from the BU9326KS (IC502)
46
IRMC
I
Attenuate display selection signal input from the RF amplifier (IC501)
47
VDD
—
Power supply terminal (+3V)
48 to 51 COM3 to COM0
O
Common drive signal output to the liquid crystal display on the switch unit
52
VREFH
I
Reference voltage input terminal (+3V) (for A/D converter)
53
VREFL
I
Reference voltage input terminal (0V) (for A/D converter)
54
ESPSL/TEST
I
Service mode setting terminal "L": service mode, Normally: fixed at "H"
55
KEY
I
Key input from the switch unit (A/D input)
56
RMKEY
I
Key input from the headphone with remote commander (A/D input)
57
DCINMNT
I
DC in voltage detection input terminal (A/D input) Also used for DC IN detection
Battery voltage detection input terminal
58
BATMNT
I
Also used for rechargeable battery/dry battery detection
59
CHGMNT1
I
Battery charging voltage detection input from the MPC18A26VMEL (IC401)
60
VSS
—
Ground terminal
Battery voltage detection input terminal (A/D input)
61
CHGMNT2
I
Also used for rechargeable battery/dry battery detection
62
OSMNT
I
DSP offset voltage adjustment voltage monitor input from the BU9326KS (IC502)
63 to 77
SEG0 to SEG14
O
Segment drive signal output to the liquid crystal display on the switch unit
78, 79
SEG15, SEG16
O
Segment drive signal output terminal Not used (open)
Error correction "L": quadruple correction, "H": double correction
80
X9326
I/O
Fixed at "L" in this set
– 22 –
D-E808/E885
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