Sony Walkman MZ-MH900 Service Manual page 38

MZ-NH900
• IC Block Diagrams
IC301 AK5356VN-L
21 20 19 18 17 16 15
MICR 22
MVDD 23
CONTROL
MVSS 24
REGISTER
INTERFACE
MVCM 25 VCOM
MRF 26 MIC POWER
SUPPLY
MPWR 27
LIN 28
A/D
INTERFACE
CONVERTER
CONTROLLER
VCOM
1 2 3 4 5 6
IC401 MM1655NCBE
24 23
BAT– 25
RF1 26
IAMP_CAL 27
AMP_SEL 28
+ –
+ – VREF
VREF
I_CTL2 29
CHG_SW1 30
BAT+ 31
VO 32
DIVIDER
SWITCHING
SWITCHING
CIRCUIT
CHARGE
CONTROL
CONTROL
RECEIVER
ON/OFF
–
+
VREF
1 2 3 4
MZ-NH900
RESET 14 PDN
13
CSN
12 CCLK
11 CDTI
10 LRCK
9 MCLK
8
BCLK
AUDIO
7
22 21 20 19 18 17
A/D
CONVERTER
16 TYPE2
15 CFB
14 IAMP_CTL
+ –
13
A7CAL_SW
12 IN1–
11 TYPE1
TIME
OSC
10 WDT
DET
COMPARATOR
BLOCK
CHARGE CONTROL
ON/OFF
ERROR LED
9 LED_CTL
CONTROL
CHARGE SWITCH WAKE-UP
8 PWR_WAKE
CONTROL CONTROL
5 6 7
IC351 CXD9811K
21 20 19 18 17 16
CHARGE BEEP
PUMP AMP
LEVEL
PRE
SHIFTER
DRIVER
VSS 22
LEVEL
MCK 23 PRE
SHIFTER
DRIVER
VDD 24
EN1
25
EN2 26
ENREG 27
LEVEL LEVEL LEVEL BEEP
SHIFTER SHIFTER SHIFTER AMP
ENVG 28
1 2 3 4
IC501 SN761059ZQLR
42 41 40 39 38 37 36 35 34 33 32
SERIAL
INTERFACE
VCC2
VCC
NPPO 43
VCC2
AVCC2 44
OFTRK 45 OFTRK
T-ON
TON-C 46
ADIP
BOTM 47
PEAK/
BOTTOM
PEAK 48
D 49
A 50
TE
B 51
ABCD
C 52
AVCC 53 VCC
JX 54
JY 55
FE
LY 56
1 2 3 4 5 6
38 38
15
LINE AMP
14 VDDO2
(P-N)
13 CFB
HEADPHONE AMP
(N-N)
12 VREF
11 VCONT
10 VREG
HEADPHONE AMP
(N-N) 9 VREGO
LINE AMP
8 VDDO1
(P-N)
5 6 7
31 30 29
28 CN
POWER
27 CPGND
SUPPLY
26 CLK
TEMP
A+B+C+D VREF09
I+J A-C
NPP D-C
TON MALFA
CSL MIJ
AW+DW AWBPF
TON PEAK S-MONITOR DW
TON BOTM DWBPF
ADIP OFTTH
TE APC
TWPP ADIP-BPF
PK/BTM VFREF0.4
25 CCSL2
AW I-J
24 CDN
CSLO
23 ADFG
22 WPP-LPF
TPP/WPP
21 SMON
20 PD-BUF
19 PD-NI
18 PD-I
APC
17 PDO-SOURCE
RF
16 PDO-SINK
15 A-C
7 8 9 10 11 12 13 14