Sony Walkman ICF-CD832, Service Manual

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ICF-CD832
26 26
IC701 LC78646E-E (CD Board)
5-14. IC BLOCK DIAGRAMS
60
59
58
57
56
55
54
53
52
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
SLCO
SLCIST
EFMIN
RF
FDO
SPDO SLDO
GPDAC
FDO
SPDO
SLDO
GPDAC
CONT4 CONT5
SBCK/CONT6
SBCK/FG
DEFECT
CONT4 CONT5
SBCK/CONT6
SBCK/FG
DEFECT
V/P
V/P
FSEQ
MONI1 MONI2 MONI3 MONI4 MONI5
V/P
FSEQ
MONI1 MONI2 MONI3 MONI4 MONI5
VSS
VDD(3.3V)
69 68 67 66 65 64 63 62 61
VSS VDD5 DRF RES WRQ DO DI CL CE
79 78 77 76 75 74 73 72 71
LDS
80
LDD FR VVDD PCKIST VVSS PDO2 PDO1 CONT1 CONT2
70
CONT3
WRQ
DO
DI
CL
CE
FR
VVDD
PCKIST
VVSS
SBCK/FG
PDO2
PDO1
CONT1-3
SBCK/CONT6
CONT4,5
DRF WRQ DO DI CL CE LDS LDD
LDS
LDD
FR VVDD PCKIST VVSS PDO2 PDO1 CONT1 CONT2 CONT3
RFVDD
RFVSS
FIN1
FIN2
TIN1
TIN2
VREF
FIN1
FIN2
TIN1
TIN2
REFI
REFI
DEFECT
FE
TEC
TE
RFMON
JITTC
ADAVDD
ADAVSS
TDO
SLCO
SLCIST
EFMIN
RF
FIN1
FIN2
TIN1
TIN2
VREF
REFI
FE
TEC
TE
RFMON
JITTC
JITTC
ADAVDD
ADAVSS
ADAVDD
ADAVSS
TDO
DATA
DATACK
LRSY
ASDFIN
ASDACK
ASLRCK
DATA
DATACK
LRSY
RVDD
RVSS
RCHO
LCHO
LVSS
LVDD
ASDFIN
ASDACK
ASLRCK
16MOUT
EFLG
C2F
FSX/16MIN
EFLG
C2F
FSX/16MIN
XVSS
XIN
XOUT
XVDD
16MOUT
XVSS
XIN
XOUT
XVDD
RVDD
RCHO
RVSS
LVSS
LCHO
LVDD
DATA
DATACK
LRSY
ASDFIN
ASDACK
ASLRCK
16MOUT
EFLG
C2F
FSX/16MIN
XVSS
XIN
XOUT
XVDD
RVDD
RCHO
RVSS
LVSS
LCHO
LVDD
39 40
DOUT
TEST
51
50
49
48
47
46
45
44
43
42
41
+
–
MIX
PH
BH
MONI
CONT
EQ
+
–
+
–
+
–
+
–
+
–
+
–
LPF
TBAL
TBAL
RAM
TDO
TRACK JUMP
SW D/A
APC
SUBCODE DECODE CRC
GENERAL PURPOSE
PORTS
8FS
DIGITAL FILTER
1BIT DAC LPF
ERROR
CORRECTION
AUDIO CD
MONITOR SIGNAL SELECTOR
EXTERNAL
AUDIO IN
AUTO ADJUST
FRAME SYNC
DETECT,PROTECT,INSERT,
EFM DECODE
A/D
CLOCK
GENERATOR
COMMAND
INTERFACE
SERVO PROCESSOR
LEVEL SET
+
–
S/H
SW
DRF
DRF
ATTENUATION
DEEMPHASIS
INTERPOLATION
MUTE
RUPTURE DEFECT
SLICE LEVEL
CONTROL
CLV,CAV
CONTROL
SERIAL
OUT
AUDIO OUT
RAM
JITTER
DETECT
PLL
VCEC
FE
TE
TEC
RF
RFMON
VREF
SPDO
SLDO
GPDAC
FSEQ
MONI1-5
FDO
LPF
LPF
AGC
5-13. IC PIN DESCRIPTION
• IC401 uPD789477GC-A28-8BT (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 to 29 NC — Note used (Open)
30 to 37 SEG7 to SEG0 O LED segment driver signal output
38 AVDD — Power supply pin (+3.3 V)
39 FSEQ I CD frame sync input
40 CD OPEN I CD open detection signal input
41 VERSION I Distination select signal input
42, 43 KEY1, KEY0 I Key data input
44 to 46 SW2 to SW0 I Switch data input
47 AVSS — Ground
48 NC — Not used (Open)
49 AC IN I AC power failure detection signal input
50 WRQ I CD write request data input
51 50/60HZ I LED display sync signal input
52 BUZZER O Beep sound output
53 CD DATA IN I CD serial data input
54 DATA I/O CD serial data input/ouput
55 CLK O CD serial clock signal output
56 LAT O CD latch signal output
57 DRF I CD DRF signal input
58 XRST O CD reset signal output
59 A MUT O Audio mute control signal output
60 POWER ON O Power AMP standby control signal output
61 BRIGHTNESS O LED brightness control signal output
62 to 68 SEG14 to SEG8 O LED segment driver signal output
69 IC — Connecting to Ground
70 XT1 — Sub system clock (32.768 kHz)
71 XT2 — Sub system clock (32.768 kHz)
72 VDD0 — Power supply pin (+3.3 V)
73 VSS0 — Ground
74 X1 — Main system clock (4.19 MHz)
75 X2 — Main system clock (4.19 MHz)
76 RESET — System reset signal input
77 RADIO ON O Radio power supply control signal output
78 CD ON O CD power supply control signal output
79 CD/RADIO O CD/RADIO indicator drive signal output
80 NAP LED O NAP indicator drive signal output