Sony MZ-E55 Service Manual page 18

IC551 MPC17A55FTA
54 53 52
PRE DRIVER
HI–BRIDGE
CONTROL
F12
55
R12 56
F11 57
R11 58
R13 59
60
F13
61
R14
F14 62
63
OE
VC
VC
REN
VREG
64
VREG
65
CONT
RGND 66
CLPF
67
VC
68
VC
GND 69
VG
VG
70
VG
71
PWM
SLEEP UP/DOWN
DI
72 /POWER SW
DECODER
VG
POWER SW
PRE DRIVER
1 2 3
51 50 49 48 47
PRE DRIVER
HI–BRIDGE
CONTROL
1ntOE
ROE
1ntSTB
VC
BIAS
CONTROL
1ntSTB
DO or DI
STEP UP/DOWN
PRE DRIVER
5 6 8
4 7 9
– 27 –
46 45 44 43 42
PRE DRIVER
HI–BRIDGE
CONTROL
VG
VG
STEP–UP
PRE DRIVER
10 11 12 14 15
13
41 40 39 38 37
PRE DRIVER
HI–BRIDGE
CONTROL
VC VC VG
VC VC VG
VC VC VG
VC
18
16 17
HIU
36
HIV
35
HIW
34
33 P11
P12
32
31
VPS2
30
PO2
GND
29
PS
28
PO1
27
VPS1
GND
26
3P2
25
HOW
24 VD2
HOV
23
GND
22
3PI
HOU
21
20
VD
IN
19