Block Diagram - Sony M-98V Service Manual

Pin No. Pin Name I/O Pin Description
51 TAPE COND I Tape detect signal input. "H": With tape and microcomputer start-up at H edge input.
52 HOLD COND I Hold detect signal input. "L": Hold on
53 CS O LCD driver chip select signal output. "H": Data transfer
54 SDATA O LCD driver serial data signal output.
55 SCLK O LCD driver serial clock signal output.
56 NC — Not used. (Open)
57 AVSS — A/D converter ground pin.
58 NC — Not used. (Open)
59 AVR — A/D converter reference voltage.
60 RM COND I Remote control microphone plug, pause detect signal input. (Analog voltage)
61 KEY IN I Key input data signal. (Analog voltage)
62 KEY IN 2 I Key input data signal. (Analog voltage)
63 BATT IN I Power voltage level signal input. (Analog voltage)
64 NC — Not used. (Open)
– 11 –

6-2. BLOCK DIAGRAM

J101
MIC
(PLUG IN POWER)
MIC SW
Q125
MIC
POWER
SW
MIC SW
Q105
Q103(1/2)
MIC
MIC901 AMP
Q101
MIC MIC SW MIC SW
Q102 Q104
PB SW
Q107-109
MIC SW
Q103(2/2)
HRPE901
REC/PB/ERASE
S101-1 TAPE SPEED
HEAD
BIAS OSC
1.2cm 2.4cm
Q111
FWD
REC/PB HEAD BIAS SW
Q112
REV
ERASE CURRENT
Q113(1/2)
FWD
ERASE HEAD
ERASE CURRENT PB SW
Q113(2/2) Q118
REV
LED SW
D901
Q114
REC
B+
(3V)
REC
SW
Q126
S701
(MODE SELECT)
MD1
MD2
MD3
MD0
04
– 12 –
REC IN
3
VCC 17
+
–
FILTER B+
Q106 (3V)
POWER
REF 5 REF OUT
OUT A
REF
9
MIC
REC NF
24
SENS
Q116 POWER
OUT B
7
S102
H
PRE, POWER AMP
MIC
IC101
SENS L
REC OUT
20
PB IN
23
LINE
+ OUT
21
–
PB NF
REC SW 22
Q115
REC/PB
16 SYSCON
POWER IN
REC SW
14
Q117
19 REG OUT
LED MUTE
POWER
10 LED 12
MUTE
S702
FAST PB
47 FPB COND MUTE CTL 19
OFF
BP701 (SERVICE) PRE AMP 26
ON C/R CTL 20
40 SERVICE
VOR COND1 24
16 REC CTL2 C/R COND2 35
18 REC CTL1
START SWITCH
22 PB CTL M CTL1 33
Q601(1/2),614(2/2)
46 MD0
41 MD3
START CONTROL
MD2 M CTL2 15
42
Q615
SYSTEM
MD1
43
CONTROL
IC701
DIRECTION SWITCH
M DIR 31
S703 Q601(2/2),614(2/2)
TAPE DET
51 TAPE DET
( ) TAPE
Q702,703
DET
SPEED CONTROL
S707 36 REV NAIL
FTB CTL 23 (FAST PB)
(REV)
Q602,603
S708 37 FWD NAIL RV601
(FWD) 2.4cm/s
RV601
TAPE
SPEED
60 RM COMB
RV602
RV602
53 CS 1.2cm/s
LCD
TAPE
54 SDATA SPEED CONTROL (CUE)
DISPLAY
SPEED
Q604
55 SCLK
M SPD1 27
KEY SW
50 WAKE UP M BRK 30
Q705, 706
RST 2
OFF
61 KEY IN S704
62 KEY IN2 HOLD DET 52 HOLD
ON
B+
60 BATT IN
(3V)
5 XO EN V 34
X701
Q701
4MHz
8 XI RIF COND 48
OFF
S103
ON V•O•R
POWER SW B+
Q123, 124 (3V)
J102
EAR
SP901
(SPEAKER)
VOR
IC102
VCC 8
1 IN OUT1 7
OUT2 6
VOR POWER
RV101
VOR LEVEL SW
SW
VOL
Q121
Q122
B+(3V)
MUTE SW MUTE SW
Q127, 128 Q119, 120
REF
SOFT
SWITCHING
DRIVE
U IN
10
BACK
V IN
ELECTROMOTIVE 9
W IN
POWER DET
25
U
13
SOFT OUTPUT
START
START TUNING V
1 SWITCHING DRIVER 15
CONTROL CONTROL
W
DRIVE BUFFER
17
COM
C ST STARTING (3V)
26
OSC
REV
27 FWD/REV MOTOR SERVO
MOTOR
IC601
BRAKE
Q605-607
SAW SERVO REF.V TERMINAL
30
AMP GENERATOR PROTECT
S101-2
2.4cm
TAPE
BRAKE
SPEED
1.2cm
ON/OFF
Q608
V. REF
28
B+ (3V)
RESET
B+
IC702
(3V)
DC-DC
B+ POWER SWITCH 3V REG DDC SW
CONVERTER
DRY BATTERY
(3V) Q704 IC801 Q901,902
IC802
SIZE "AA"
(IEC DESIGNATION R6)
Signal path 2PCS, 3V
B+
REEL
J701
(3V)
ROTATION DET : REC
DC IN 3V
PH701
: PB
– 13 –
M-98V
M901
MOTOR
U
V
W