Sony M-730V Manual de usuario
– 1 –
SERVICE MANUAL
M-730V/830V
MICROCASSETTE
TM
-CORDER
SPECIFICATIONS
Ver 1.1 1999. 01
MICROFILM
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MZ-730V-99
US Model
Canadian Model
AEP Model
E Model
M-730V/830V
Chinese Model
M-730V
Tourist Model
M-830V
Photo : M-830V
Ver 1.1 2000. 01
– 2 –
TABLE OF CONTENTS
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270˚C during
repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
1. GENERAL ....................................................................3
2. DISASSEMBLY
2-1. Lid Assy, Cassette ............................................................... 4
2-2. Lid, Battery Case ................................................................ 4
2-3. Cabinet (Rear) Assy ............................................................ 5
2-4. Speaker Assy, Microphone .................................................. 5
2-5. Main Board ......................................................................... 6
2-6. Mechanism Deck................................................................. 6
2-7. LED Unit ............................................................................. 7
2-8. Head, Creamic (HRPE901, 902)......................................... 7
3. MECHANICAL ADJUSTMENTS..............................8
4. ELECTRICAL ADJUSTMENTS ...............................8
5. DIAGRAMS
5-1. Block Diagram .................................................................. 11
5-2. Printed Wiring Board ........................................................ 13
5-3. Schematic Diagram ........................................................... 15
6. EXPLODEDVIEWS
6-1. Cabinet Section ................................................................. 17
6-2. Mechanism Deck Section (1) ............................................ 19
6-3. Mechanism Deck Section (2) ............................................ 20
7. ELECTRICAL PARTS LIST.....................................21
– 3 –
SECTION 1
GENERAL
1VOL knob
2MIC jack
3EAR jack
4VOR switch
5REC/BATT lamp
6FAST PB switch (M-830V ONLY)
7DC IN 3V jack
8TAPE COUNTER
9CUE MARKER button (M-830V ONLY)
0i(Battery) lamp (M-830V ONLY)
!¡ Microphone
!™ r(REC) button
!£ CPAUSE knob
!¢ œ(Playback) button
!∞ CUE/REVIEW knob
!§ TAPE SPEED select knob
!¶ wp(Eject/Stop) button
!• DIR cknob
!ª FWD/REV
∑
– 4 –
SECTION 2
DISASSEMBLY
•The equipment can be removed using the following procedure.
Note : Follow the disassembly procedure in the numerical order given.
2-1. LID ASSY, CASSETTE
2-2. LID, BATTERY CASE
Set Lid assy, cassette Head, ceramic (HRPE901,902)
LED unit
Lid, battery case Cabinet (rear)
assy Speaker assy,
Microphone Main board Mechanism
deck
Lid assy, cassette
2
3
4
5
1
wp
(Eject/Stop) button
Lid, battery case
1
1
2
– 5 –
2-3. CABINET (REAR) ASSY
Note : When installing, fit the knobs and switches.
2-4. SPEAKER ASSY, MICROPHONE
2
Four screws
(B1.7
×
16)
1
Screw
(B1.7
×
5)
3
Claw
5
Cabinet
(rear) assy
4
Claw
s
Switch
(TAPE SPEED)
Switch
(PAUSE)
Knob
(PAUSE)
Knob
(FR)
4
Unsolder the
2 places.
1
Unsolder the
2 places.
2
Two screws
(B2
×
2.5)
3
Speaker ass
y
8
Microphone
5
Microphone
unit
6
7
Mic cushion
– 6 –
2-6. MECHANISM DECK
2-5. MAIN BOARD
1
Unsolder the 8 places.
4
Two screws
2
Unsolder the
6 places.
6
Main board
3
Unsolder the
4 places.
5
6
4
Mechanism deck
Button
(EJECT/STOP)
Button
(PLAY)
Button
(REC)
2
1
3
– 7 –
2-7. LED UNIT
2-8. HEAD, CERAMIC (HRPE901, 902)
Blacket (LED)
Claw
LED unit
1
Three screws
(1.7
×
2.3) tapping
2
1
Claw
3
M1.4, special head
4
M1.4, special head
2
Arm (pinch roller) assy
5
Head, ceramic
(HRPE901, 902)
– 8 –
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback/erase head pinch roller
rubber belts capstan
2. Demagnetize the record/playback/erase head with a head de-
magnetizer. (Do not bring the head demagnetizer close to the
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Power supply voltage : 3 Vdc
TAPE SPEED switch : 2.4cm
Torque Measurement
Mode Torque Meter Meter Reading
5 to 10 g • cm
Forward CQ-102M (0.07 to 0.140 oz • inch)
5 to 10 g • cm
Reverse CQ-102MR (0.07 to 0.140 oz • inch)
more than 30 g • cm
Fast Forward CQ-201M (more than 0.42 oz • inch)
more than 30 g • cm
Rewind CQ-201M (more than 0.42 oz • inch)
TapeTension Measurement
Mode Tension Meter Meter Reading
more than 25 g
Forward CQ-403M (more than 0.35 oz)
more than 25 g
Reverse CQ-403MR (more than 0.35 oz)
SECTION 3
MECHANICAL ADJUSTMENTS
Record/Playback/Erase Head Azimuth Adjustment
Setting:
VOL control : mechanical mid
TAPE SPEED switch : 2.4cm/s
VOR switch : OFF
FAST PB switch : OFF
Procedure:
1. Mode : Playback
Adjustment Location :
TestTape
Type Signal Used for Tape Speed
(cm/s)
S-2-A030A 3 kHz, – 20 dB
Head Azimuth Adjustment
2.4
WS-24
3 kHz, – 10 dB
Tape SpeedAdjustment 1.2/2.4
SECTION 4
ELECTRICAL ADJUSTMENTS
2. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note: Several peaks may appear, but the maximum.
First remove the cover (AZ).
EAR jack (J101)
set
16
Ω
test tape
S-2-A030A
(3 kHz, –20 dB) level meter
Remove the cover (AZ)
Head azimuth
adjustment scre
w
(FWD)
(REV)
– 9 –
Specification Value:
Tape Speed Frequency counter
1.2/2.4 cm/s 2,880 to 3,120 Hz
Tape Speed Adjustment
Setting:
VOL control : mechanical mid
VOR switch : OFF
FAST PB switch : ON (M-830V model only)
Procedure:
• Reform 2.4 cm/s speed adjustment before 1.2 cm/s speed adjust-
ment mode : playback
Frequency difference between the beginning and the end of the
tapeshould be within ±0.5%.
Adjustment Location :
First remove the plate, blind.
1. Tape Speed : 2.4 cm/s
Playback WS-24 (tape center part) and adjust RV601 so that
reading on the digital frequency counter becomes 3,000 Hz.
2. Tape Speed : 1.2 cm/s
Playback WS-24 (tape center part) and adjust RV602 so that
reading on the digital frequency counter becomes 3,000 Hz.
0000
EAR jack (J101)
digital frequenc
y
counter
set
16
Ω
test tape
WS-24: tape speed 1.2/2.4cm/s
(3 kHz, –10 dB)
Remove the
plate, blind.
RV602
(1.2 cm/s)
RV601
(2.4 cm/s) Speed adjustable
resistors
– 10 –
• IC Block Diagrams
IC101 LA4168ML
IC501 MM1251M
(M-830V model only)
SECTION 5
DIAGRAMS
IC601 LB1877V
+
–
+
–
+
–
+
–
21222324252627282930
235
4678910
111 12 13 14 15
16
17
181920
300k
EQ MIC
2.2k
30k
2k
PAUSE
POWER
MIC
VCC
Vref R/P
R, F
GVN
VOX
SPEED
ALC
VOX
20k
REC
12
PRE GND
EQ IN
MIC IN
Vref OUT
MIC VCC
R, F OUT
LED DRIVE
R/P SW
PAUSE
P/R MUTE
GVN CONT
GVN Vref
Vs
GVN GND
GVN OUT
PRE NF
PRE OUT
REG IN
REG OUT
ALC CONT
VOX CONT
VOX DELAY
GNV SPEED UP
AUT STOP CONT
AUT STOP IN
PWR IN
PWR OUT1
PWR GND
PWR OUT2
Vcc
UOUT
DR
VCC
LB
FC
OUT
VSP
IN+
VREF
S/S
20 19 18 17 16 15 14 13 12 11
VOUT
WOUT
P-GND
WB
VB
UB
OSC
COM
GND
RI
1 2 3 4 5 6 7 8 9 10
DRIVER STARTUP
DIR LOGIC
STARTUP
DET
WAVEFORM
DET
CURRENT
DET
SPEED
DET
LOCKING
PROTECT
OSC
BIASREF V
TSD +
–
1234
5
6
7
8
+
–
+
–
VOLTAGE UP
CIRCUIT
VREF
NC
VCC
VS
HYS
NC
CT
GND
OUT
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