Service manual

– 25 –
MD-SR50H/50W/60E/60W
Figure 25 BLOCK DIAGRAM
IC651
MOTER DRIVER
LB1930M
VCC
VCC VEE
IC841
S8324A28
2.8V UP CONVERTER
IC251 FTD2017 IC253 RN4904 IC255 NJM022V IC256 RN4911 IC257 S80808LN IC258 259 HN1C01FU IC260 RN4904 IC809 RN4904 IC892 HN1C01FU TRANSISTOR, N-ch MOS FET,
DIGITAL TRANSISTER, OP AMP, RESET
M903
LIFT
MOTOR
IC842
XC62HS02
2.35V REGULATOR
IC822
IR3M14N
DC/DC
CONVERTER
IC501
AD/DA CONVERTER
AK4550VT
M902
SLED
MOTOR
IC101
RF SIGNAL
PROCESSOR
IR3R55
2.5V REGULATOR
IC771 62GR2522
IC401
SYSTEM
MICROCOMPUTER
IX0341AW
RIPPLE
FILTER
VCC VEE
IC873
62GR4522
4.5V
REGULATOR
OPIC
LASER PICK
HEAD
M901
SPINDLE
MOTOR
IC201
ENDEC/SERVO/
ATRAC
LR37811
+2.7V +2.5V
T F
+2.5V
+2.7V
+2.7V
VDD +2.0V
AVCC +2.5V
+7V
+2.5V
J703
HEADPHONES
LINE
J703
REMOTE
CONTROL
IC801 62RP2002 IC802 HN1C01FU IC803 S80819LN TRANSISTOR, RESET IC
J801
DC IN
(4~5.5V)
1.0-1.7V
+2.35V
LCD ASS'Y
KEY FLEXIBLE PWB ASS'Y
IC901
SPINDLE MOTOR
DRIVER
LB1971V
IC703
AUDIO AMP.
IR3R59N
IC701
AUDIO AMP.
IR3R54N
IC601
4-CH PWM DRIVER
LV8017W
VM
IC402
EEPROM 58X2402T
VS
IC202
IX2567AF
4M D-RAM
+2.5V
OPTICAL IN
UNIT
J701
OPTICAL IN
J701
LINE IN
J702
MIC IN
(READY FOR
PLUG/IN
POWER)
2.0V
REGULATOR
IC203
62FP2002
1,2,
21,23
6
5,7
7,30,35
VCC VG
43
16,18,
20,22
39,41
17,21,27, 40,44
13,14 23
40
26-29, 32-37, 39-46
1-9, 11-19
7,9
66
74
9
2,3
15,16
4,21
20 17
9,16 6,19
10,12
6
24 L-CH
22 R-CH
17
Q721
1-2
2,13,14,24,
25,36,37
6-9
1-12
1,5,6,7
14-17
55, 59, 81, 82
9, 11, 13, 48
75,83
74
2
18-24
50
5
5
2
5
8
3
10
+2.7V
82-84,86, 89-100
12,62,68,87
3
4
2
2
5,6
NC
SW402 HOLD
SW902 DISC PROTECT
95
4
SW401 EJECT
SW403 LID
DETECTION
19 40,65,77,78,98
73
8
PLAYBACK SIGNAL
RECORD SIGNAL
+B
M
M
M
6
Ni - MH Battery
or
Dry Battery
(1 pieces)
+2.7V
+2.7V
1, 20-30, 73, 33-35
R-CH
L-CH
2
R-CH
3
L-CH
3
VCC
L-CH
5
8
R-CH
NOR GATE IC351 74ACT02T N-ch MOS FET IC354 CPH5608 IC353 FTD2005
VCC
IC852
IR3M14N
DC/DC
CONVERTER
F841 0.4A,DC 60V
2
2
2
VCC
2,3
+2V
+1-2V
1
+2.5V
IC431
RESET
S80820LN
1
62
IC621 RN4904
DIGITAL
TRANSISTOR
1
6
5
+2.5V
-2.5V
+4.0V