Sony M-200MC User manual

M-200MC
SERVICE MANUAL
MICROCASSETTE
TM
-CORDER
SPECIFICATIONS
Ver 1.1 2002. 01
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MZ-200MC-99
US Model
Canadian Model
AEP Model
E Model
Chinese Model
Tape (normal position type)
Recording system
2-track 1-channel monaural
Speaker
Approx. 2.8 cm (1
1
⁄ 8 in.) dia.
Tape speed
2.4 cm/s (
15
⁄ 16 ips), 1.2 cm/s (
15
⁄ 32 ips)
Frequency range
300 - 4 000 Hz (with TAPE SPEED switch at 2.4 cm)
Output
Earphone jack (minijack) for 8 – 300 Ωearphone
Power output (at 10% harmonic distortion)
250 mW
Power requirements
3 V DC, two R03 (size AAA) batteries/External DC 3V power sources
Dimensions (w/h/d)
Approx. 27.8 ×127 ×69 mm (1
1
⁄ 8 ×5 ×2
3
⁄ 4 in.) incl. projecting parts and
controls
Mass
Approx. 140 g (5 oz) (main unit only)
Design and specifications are subject to change without notice.
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-873-133-12
2002A1600-1
© 2002.1

2
TABLE OF CONTENTS
M-200MC
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 ································································ 4
2-1. Lid Assy, Cassette ································································· 4
2-2. Lid Assy, Battery Case ·························································· 4
2-3. Cabinet (Rear) Assy ······························································ 5
2-4. Main Board ··········································································· 5
2-5. Microphone, Built-in C-2038 set ·········································· 6
2-6. Speaker, LED Board ····························································· 6
2-7. Mechanism Deck ·································································· 7
2-8. Head, Ceramic (HRPE901, 902)··········································· 7
3. MECHANICAL ADJUSTMENTS ······························· 8
4. ELECTRICAL ADJUSTMENTS ································· 8
5. DIAGRAMS········································································ 9
5-1. Block Diagram ···································································· 10
5-2. Printed Wiring Board ·························································· 11
5-3. Schematic Diagram ····························································· 12
6. EXPLODED VIEWS ······················································ 13
6-1. Cabinet Section ··································································· 13
6-2. Mechanism Deck (1)···························································15
6-3. Mechanism Deck (2)···························································16
7. ELECTRICAL PARTS LIST ······································· 17

3
M-200MC
SECTION 1
GENERAL
Microphone
Micrófono
Microphone zxt
EAR MIC MODE TAPE
COUNTER TAPE SPEED
CUE
MARKER
REC lamp
Lámpara REC
Voyant
d’enregistrement
(REC)
DIR
nNnN
VOR
PAUSE
FF/CUE·
REW/REVIEW
This section is extracted
from instruction manual.

4
M-200MC 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
Set Lid assy, cassette Head, ceramic
(HRPE901,902
)
Lid assy,
battery case
Cabinet (rear)
assy Microphone,
built-in C-2038 set
Main board Mechanism
deck
Speaker,
LED board
2-2. LID ASSY, BATTERY CASE
2
3
4
1
Lid assy, cassette
Tx (Eject/Stop) button
1
2
3
Lid assy, Battery case

5
M-200MC
2-3. CABINET (REAR) ASSY
Note : When installing, fit the knobs and switches.
1 Five screws
(1.7
× 16)
3 Cabinet
(rear) assy
2 Claws
4 Knob (PAUSE)
2-4. MAIN BOARD
2 Unsolder the 2 places.
1 Lever (M SW), selection
3 Unsolder the 5 places.
4 Unsolder the 8 places.
5 Unsolder the 4 places.
6 Unsolder the 5 places.
7 Screw (1.7 × 16)
8 Two screws (M1.4 × 4.5)
9 Main board

6
M-200MC
2-5. MICROPHONE, BUILT-IN C-2038 SET
2-6. SPEAKER, LED BOARD
3 Three screws (M1.4)
6 Microphone, built-in C-2038 set
5 Case (front), microphone
12
4
Microphone case (Lower)
2 Screw (M1.4 × 4.5)
3 LED board
1 Cabinet (Front) assy
4 Two screws
(B2
× 2.5)
5 Speaker
6 Cam (MM)

7
M-200MC
2-7. MECHANISM DECK
2-8. HEAD, CERAMIC (HRPE901, 902)
4Mechanism dec
k
Flywheel assy
How to apply the belts.
M901 Button
(EJECT/STOP)
Button
(PLAY)
Button
(REC)
2
1
3
1 Claw
3 M1.4 × 4.5, locking
4 M1.4, special head
6 M1.4, special head
7 M1.4 × 4.5, locking
2 Arm (pinch roller) assy
5 Head, ceramic
(HRPE901)
8 Head, ceramic
(HRPE902)

8
M-200MC SECTION 3
MECHANICAL ADJUSTMENTS SECTION 4 ELECTRICAL ADJUSTMENTS
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
0.49 – 0.98 mN • m
Forward CQ-102M (0.07 to 0.140 oz • inch)
0.49 – 0.98 mN • m
Reverse CQ-102MR (0.07 to 0.140 oz • inch)
more than 2.94 mN • m
Fast Forward CQ-201M (more than 0.42 oz • inch)
more than 2.94 mN • m
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)
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 Speed Adjustment 1.2/2.4
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
EAR jack (J101)
set
16 Ω
test tape
S-2-A030A
(3 kHz, –20 dB) level meter
2. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note: Several peaks may appear, but the maximum.
Adjustment Location :
First remove the lid.
Remove the lid
Tape
Head azimuth
adjustment screw
(FWD)
(REV)

99
M-200MC
SECTION 5
DIAGRAMS
• IC Block Diagrams
IC101 NJM2775
IC401 MM1251M
IC601 LB1877V
1234
5
6
7
8
+
–
+
–
VOLTAGE UP
CIRCUIT
VREF
NC VCC VS HYS
NC
CT
GND
OUT
IC501 NJM2072M
1
2
3
4
8
7
6
5
GND
AMP OUT
GAIN CONT
INPUT VCC
OUTPUT2
OUTPUT1
RECOVERY
TIME CAP
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 +
–
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8
PRE
S GND
POW
A
POW
B
PGND
TC
ALC
ALC
IN
RIPPLE FILTER
RF OUT RF IN
PRE -IN PRE OUT POW OUTA V+ POW GND POW OUTB TC ALC IN
PRE +IN
SGND
POW +INA
POW -INA POW -INB
POW +INB
RF OUT
RF IN
Tape Speed Adjustment
Setting:
VOL control : mechanical mid
VOR switch : OFF
FAST PB switch : OFF
Procedure:
•Reform 2.4 cm/s speed adjustment before 1.2 cm/s speed adjust-
ment mode : playback
0000
digital frequenc
y
counter
set
16 Ω
test tape
WS-24: tape speed 1.2/2.4cm/s
(3 kHz, –10 dB)
EAR jack (J101)
SpecificationValue:
Tape Speed Frequency counter
1.2 cm/s 1,455 to 1,545 Hz
2.4 cm/s 2,910 to 3,090 Hz
Frequency difference between the beginning and the end of the
tape should be within ±0.5%.
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 1,500 Hz.
Adjustment Location :
First remove the plate, blind.
Remove the
plate, blind.
RV601
(2.4 cm/s) RV602
(1.2 cm/s)
Speed adjustable
resistors

1010
M-200MC
Signal path
: PB
: REC
1
13
11 14 15 19
2
20
M
B+
(+3V)
M901
MOTOR
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
2PCS, 3V
DC IN 3V
CN101
S102
(POWER)
UOUT
VOUT
IN+
S/S VSP
OUT
DR
12 VREF
WOUT
2.4cm
1.2cm
OFF
ON
FAST PB
RV601
TAPE
SPEED
1.2cm
RV602
TAPE
SPEED
2.4cm
FAST PB SWITCH
DRIVER
STARTUP
DIR LOGIC
WAVEFORM
DET
LOCKING
PROTECT
STARTUP
DET
CURRENT
DET
SPEED
DET
REF V OSC
BIAS
+
-
+
+
MOTOR SERVO
B+
B+
B+
S103
CUE MARKER
Q405
47 OUTVCC
BATTERY LOW DET
HRPE901
REC/PB/ERASE
HEAD
(REC/PB)
(ERASE)
HRPE902
REC/PB/ERASE
HEAD
(REC/PB)
(ERASE)
PB
REC
S101 (4/6)
S101 (1/6)
1.2cm
2.4cm
ON
OFF
Dictation
Meeting
Lecture
MIC
UNIT
MAIN BOARD
S105
MIC MODE
Q307,308
REG
Q101
LPF
PRE
AMP
RIPPLE
FILTER
S501
VOR
1
7
16
15
IC101 (1/2)
PRE AMP
-
+
+
-
-
+
ALC
POWER
AMP A
POWER
AMP B
RF OUT
RV101
VOL
S101 (2/6)
PB
REC
S101 (3/6)
REC
PB
S101 (6/6)
REC
PB
REC
PB
REC
PB
S101 (5/6)
J101
EAR
SP901
SPEAKER
BATT REC
S701
D402 D401D403
IC401
Q305
Q306
DIR
SWITCH
IC101 (2/2)
POWER AMP, ALC
Q602
1
5
8
6
IN
RCV
TIME
VCC
OUT1
IC501
SIGNAL LEVEL
SENSOR
Q502
REC
MUTE
Q705
BUFFER
Q704
CUE OSC
Q701 - Q703
CUE SWITCH
Q601
SWITCH
Q706
OSC
3
4
5
6
14
11
9
B +
B +
(DIR)
B +
S104
PAUSE
Q603
Q301
Q402
Q403
VOICE
MIRROR
Q404 Q406 Q401 (1/2)
Q401 (2/2)
OUT B
OUT A
ALC IN
+ IN A
+ IN
- IN
OUT
VCC
Q302
S601 (1/2)
TAPE SPEED
S601 (2/2)
TAPE SPEED
IC601
S602
LED BOARD
OFF ON
5-1. BLOCK DIAGRAM