Harman Kardon HD 755 (serv.man9) Service Manual ▷ View online
Pin Functions
Pin
Name
Description
1
PB1
No connection
2
PB0
No connection
3
AVSS
Connected 0V
4
TEST
Connected 0V
5
X2
No connection
6
X1
Connected 5V
7
VSS
MCU ground line; connected to 0V
8
OSC1
10MHz crystal input
9
OSC2
10MHz crystal input
10
RES
MCU reset line; 0V = reset; 5V = normal operation
11
P90
No connection
12
OP_SW
CD door open position switch; 0V=door open
13
CL_SW
CD door close position switch; 0V=door close
14
MTR_CL
CD door close motor control line
15
MTR_OP
CD door open motor control line
16
S0S1
CD DSP SUBQ ready input; high pulse for SUBQ ready
17
P60
No connection
18
P61
No connection
19
CDRW
CDRW RF gain control; 0V=CDRW
20
PUSW
Laser pickup inner switch; 5V=pickup at inner position
21
XRST
CD DSP reset line; 0V = DSP reset
22
STAT
CD DSP internal status output
23
DMUTE
CD DSP mute control; 5V = mute on
24
SUBQ
SUBQ output
25
SQCK
SUBQ output serial clock
26
TLOCK
CD DSP track lock status; 0V = locked
27
FLOCK
CD DSP focus lock status; 0V = locked
28
SENSE
CD DSP internal status
29
MLD
CD DSP command latch
30
MDATA
CD DSP serial command data
31
MCLK
CD DSP serial command clock
32
P57
No connection
33
VCC
MCU power supply; connected to 5V
34
DAC.LD
PCM1732 serial command latch
35
DAC.CLK
PCM1732 serial command clock
36
DAC.DATA PCM1732 serial command data
37
DACRST
PCM1732 reset pin; 0V = reset
38
POWER
Servo power on/off control; 5V = power on
39
P80
No connection
40
P81
No connection
41
P82
No connection
42
P83
No connection
43
HDCD
HDCD decoding status from PCM1732; 5V = HDCD
HD755
37
44
AMUTE
System mute control; 0V = mute
45
P86
No connection
46
P87
No connection
47
P20
No connection
48
P21
No connection
49
P22
No connection
50
VFD.DO
Display driver status serial data
51
VFD.DI
Display driver command serial data
52
VFD.CLK
Display driver command serial clock
53
VFD.LAT
Display driver command serial latch
54
P14
No connection
55
P15
No connection
56
P16
CD DSP internal status for auto-adjustment
57
REMOTE
IR remote signal input
58
AVCC
Connected to 5V
59
PB7
No connection
60
PB6
No connection
61
PB5
No connection
62
PB4
No connection
63
PB3
No connection
64
PB2
No connection
HD755
38
PNP/NPN Epitaxial Planar Silicon Transistors
Low Noise AF Amp Applications
2SA1391/2SC3382
( ) : 2SA1391
Specifications
Absolute Maximum Ratings
at Ta = 25˚C
Electrical Characteristics
at Ta = 25˚C
Package Dimensions
unit:mm
2003A
[2SA1391/2SC3382]
Features
· Adoption of FBET process.
· AF amp.
· Low-noise use.
· AF amp.
· Low-noise use.
Noise Test Circuit
JEDEC : TO-92
B : Base
EIAJ : SC-43
C : Collector
SANYO : NP
E : Emitter
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(
V
m
* : 2SA1391/2SC3382 are classified by 1mA h
FE
as follows :
0
0
2
R
0
0
1
0
8
2
S
0
4
1
0
0
4
T
0
0
2
0
6
5
U
0
8
2
HD755
39
HD755
40
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