Diagrams; Block Diagrams - Sony M-670V Service Manual

SECTION 4

DIAGRAMS

4-1. BLOCK DIAGRAMS

+VCC 2
J101
MIC
(PLUG IN POWER)
MIC1
MIC
S101
(1/4, 3/4)
REC PB
HRPE901
REC/PB
HEAD
ERASE
HEAD
VCC
+B
M901
U
CAPSTAN/
V
REEL
MOTOR W
LED
DRIVER
Q703, 706
F F OSC
Q704
1
LED
DRIVER
Q701
D701
REC/BATT
+1.7V REG.
IC401
PRE AMP
IC101 (1/2)
VDD VOUT 3
RFLT
OUT
RFLT IN
RIPPLE
2
NC
FILTER
PRE2 IN
PRE OUT
20
PRE2 NF
5
PRE1 OUT
21
PRE1 NF
23
PRE1 IN
3
REG OUT
REG
22
S601 (1/2)
TAPE SPEED
2.4cm
Q301
1.2cm
D302
Q302
DELAY
U OUT
4
V OUT
5
W OUT
6
+VCC
+B
FEEDBACK
SWITCH
Q705
LEVEL DETECT
IC701
VOUT VDD 2
Q702
+VCC
Q303
POWER ON
DETECT
Q307
1
7
Q304
MUTE
S101 (4/4) VOR
REC PB DETECT
Q305
+VCC
Q306
13
S/S VCC
2
LOGIC
DRIVE
CIRCUITY
VREF 14
OSC
IN+
15
RV601
MOTOR DRIVER
RV601
IC601
TAPE SPEED
(1.2cm)
S601 (2/2)
TAPE SPEED
1.2cm
9 9
BTL POWER AMP
IC101 (2/2)
SP IN
10 11
14
REC ALC IN
9
ALC
REC
16 17
VOR
6 19
S301
PAUSE
ON
OFF
+VCC
S602
Q601
FAST PB
ON
OFF
RV602
TAPE SPEED
(2.4cm)
• Signal path.
E
: PB
a : REC
2.4cm
M-670V/673V/675V
J102
EAR
SP1
(SPEAKER)
S101 (2/4)
REC PB
S501
VOR
OFF
ON
S102
(POWER)
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
2PCS, 3V