Sony m-430 - DIAGRAMS; BLOCK DIAGRAM

– 9 – – 10 –
M-430
5-1. BLOCK DIAGRAM
SECTION 5
DIAGRAMS
0000
EAR jack (J101)
digital frequency
counter
set
16
Ω
test tape
WS-24: tape speed 2.4cm/s
WS-12: tape speed 1.2cm/s
(3 kHz, –10 dB)
Remove the
plate, blind.
RV601
1.2cm/s
RV602
2.4cm/s
speed adjustable resistors
(REC / PB)
HRPE901
REC/PB/ERASE
HEAD
(ERASE)
D102 BATT
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
-
+
DC IN 3V
CN101
SP101
SPEAKER
J101
EAR
MIC901
MIC
S101-4
(REC/PB)
PB REC
S101-3
(REC/PB)
PB REC
S101-2
(REC/PB)
PB REC
S101-1
(REC/PB)
PB REC
+3V
+3V
+3V
1
15 3
14
9
8 4
ALC
PRE / POWER AMP
IC101
S602
2.4 cm 1.2 cm
2.4 cm 1.2 cm
TAPE
SPEED
RV601, 602
TAPE SPEED
RV101
VOL
RV602
1.2 cm
RV601
2.4 cm
MOTOR SERVO
IC601
M
+
_
M901
MOTOR
S601
PAUSE
OFF ON
S102
(POWER)
: REC
: PB
Signal Path
04
-1
-2
Tape Speed Adjustment
Setting:
VOL control : mechanical mid
Procedure:
• Reform 2.4 cm/s speed adjustment before 1.2 cm/s speed
adjustment mode : playback
Frequency difference between the beginning and the end of the tape
should be within ±0.5%.
2.4 cm/s (15 Hz)
1.2 cm/s (15 Hz)
Adjustment Location :
First remove the plate, blind.
1. Tape Speed : 2.4 cm/s
Playback WS-24 (tape center part) and adjust RV602 so that
reading on the digital frequency counter becomes 3,000 Hz.
2. Tape Speed : 1.2 cm/s
Playback WS-12 (tape center part) and adjust RV601 so that
reading on the digital frequency counter becomes 3,000 Hz.
Specification Value:
Tape Speed Frequency counter
2.4 cm/s 2,880 to 3,120 Hz
1.2 cm/s 2,850 to 3,150 Hz