Block Diagram -Key Control/Display/ Power Supply Section - Sony Walkman MZ-R900 Service Manual

6-3. BLOCK DIAGRAM – KEY CONTROL/DISPLAY/POWER SUPPLY Section –
RMC KEY
F
(Page 28)
CLK
D
(Page 27)
VRFF
E
(Page 27)
SDO0, SDI0, SCK0
G
(Page 28)
SD0 SDO0
SI0 SDI0
LCD
SCK SCK0
DRIVER
RST
&
LCD
STB
REAL TIME
CLOCK
CS
CS RTC
XWK1
REC
REC
X
PAUSE
REC LED
REC
SE1 KEY 1
SE1 KEY 2
x T MARK
, ,
REC MODE
,
END SEATCH
,
+ – VOL – –
,
(JOG LEVER L/R)
BACKUP
+
DVDD
VIF B+
UNREG VB B+
SWITCH & LCD MUDULE UNIT
RMC KEY 20
FS4 86
CLK SEL
169
FFCLR 236
SLEEP 235
VLON 234
WK DET 17
REC KEY
18
HALF LOCK SW
19
S805
OPEN
SYSTEM CONTROLLER
IC801 (3/3)
VL MON
15
187 LCD RST AUX
206 LCD STB
205 XCS LCD
216 CS RTC
RESET
VIF B+
SWITCH
VB B+
Q801
VL PWM 164
1 PAUSE KEY
VC PWM 165
208 REC LED
XRST 8
13 SET KEY1
14 SET KEY2
S801
HOLD 227 XHOLD SW
OFF
HOLD
VREC PWM 163
S802
SYNCHRO REC
228 SYNC REC
ON
OFF
VIF B+
S806 170 OPEN CLOSE SW
AUXI 48
OPEN/CLOSE
DETECT
S804
182 XGUM ON
BATTERY IN
DETECT
CHG MON 11
S803 230 PROTECT
PROTECT
DETECT CHG GAIN 237
CHG 238
HIDC MON 16
SL801 3 XTEST
(TEST)
GND SW 171
VB MON 10 VB B+
VRMC
7
XWK3
4
CLK
56
CLK SEL
52
FFCLR
54
SLEEP
55 SYSTEM
VLON
CONTROL
1
XWK1
2
XWK2
3
XWK4
5
VAIFON
53
VSTB L801
VB
VSTB
SYSTEM CONTROLLER (IC801) 6
VC
B+
VL L904
VLO
LASER APC CIRCUIT
10
B+
VREF
BANDGAP
49
REFERENCE
STEP-UP
DTC2
24 PRE DRIVER
RF2
25 DTC1
PWM
VDFB
39
VD
VD
SYSTEM CONTROLLER (IC801) 44
B+
VIF
VIFFB
SERIES
38
A/D, D/A CONVERTER (IC301),
VIF PASS
SYSTEM CONTROLLER (IC801), 42
REGULATOR
EEPROM (IC804)
B+
VAFB
VA
40
VA
A/D, D/A CONVERTER (IC301),
41
SYSTEM CONTROLLRE (IC801)
B+
D904
VC
MIC AMP (IC303),
RF AMP (IC501), VCO
35
MOTOR/COIL DRIVER (IC551),
REMOTE CONTROL CIRCUIT
B+
INM2
22
RF2
NOISE
23
FILTER
INM1
26
RF1
NOISE
27
FILTER
XRST
RESET SIGNAL
46
GENERATOR PRE DRIVER
CRST
DTC1
47
VRECO
VRECO1
L602 10
OVER WRITE
VRECO2
HEAD DRIVE 15
CIRCUIT
B+
L603
VREC
16
INM1
19
RF1
NOISE
20
FILTER
POWER
CONTROL
IC601 (2/2)
CHGMON
51
GAIN
54
CHG
55
29
29
HEADPHONE AMP (IC302),
MOTOR/COIL DRIVER (IC551)
POWER CONTROL
IC901
VL
9
REGURATOR VL
10
D902 L902
L2
SWITCHING
12
REGURATOR L2
16 VG
MOTOR/COIL
&
DRIVER (IC551)
D903
B+
VG
STEP-UP
19
DC/DC LG
18
CONVERTER
VC2
45
VC
36
REGULATOR
VC
34
SWITCH
L903
L901
VOUT
33
D901
L1
SWITCHING
32
REGULATOR
L1
28
STEP-UP
&
VB 50
PWM
L1 1
L601
SWITCHING 11
L1 2 B+ SWITCH
REGULATOR
14
Q603
STEP-UP DOWN
DW BT
SWITCH
PRE DRIVER 22
DW TP
&
21
PWM CHARGE
– +
VIO 8 VIF B+
VC2
26
CHARGE
VC 9 VC B+
CONTROL
Q602 (2/2)
RF2
49
INM2
BATTERY
48
CHARGER
INP2
47
&
REGULATOR
CHARGE
RS
46 CONTROL
Q602 (1/2)
CHG SW
CHARGE
45
CONTROL
VB
43
CHARGE
BATM
MONITOR 44
SYSTEM
DREG VIF
CONTROL 56
B+
(2/2)
LINE
50 FILTER
DCIN
T601
D605
VB
B+
L905
DRY BATTERY
SIZE "AA"
IEC DESIGNATION
R6
1PC. 1.5V
(BATTERY CASE)
D603
RECHARGEABLE
BATTERY
(NICKEL-METAL)
NH-14WM
1.2V 1400mAh
THP601
GROUND
J601
LINE
DC IN 3V
SWITCHING
Q601 – +
29