Sony Pressman M-450 User manual

SERVICE MANUAL
MICROCASSETTE
™
-CORDER
SPECIFICATIONS
Photo : M-450
Model Name Using Similar Mechanism New
Tape Transport Mechanism Type MZ-455-99
Ver 1.2 2004.05
East European Model
E Model
M-450/455
Chinese Model
M-450
9-873-588-03
2004E02-1
© 2004.05
Sony Corporation
Personal Audio Company
Pubulished by Sony Engineering Corporation
Tape
(MICRCCASSETTE)™(normal position type)
Recording system
2-track 1-channel monaural
Speaker
Approx. 3.6 cm (1 17 ⁄ 16 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/s)
Output
Earphone jack (minijack) for 8 - 300 Ω earphone
Power output (at 10% harmonic distortion)
250 mW
Power requirements
3 V DC batteries R6 (size AA) ×2 / External DC 3V power
sources
Dimensions (w/h/d)
Approx. 62.2 ×119.1 ×25.4 mm (2 1⁄2 × 43 ⁄4 × 1 in.) incl.
projecting parts and controls
Mass
Approx. 109 g (3.9 oz) (main unit only)
Supplied accessories
Microcassette tape MC-30 (1) (M-450 : EE/M-455 : E)
Design and specifications are subject to change without notice.
M-450/455

2
M-450/455
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.
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL ........................................................................ 3
2. DISASSEMBLY
2-1. Cassette Holder Asssy ................................................ 4
2-2. Cabinet (Rear)............................................................. 4
2-3. Cabinet (Front) ........................................................... 5
2-4. Main Board, Mechanism Deck ................................... 5
2-5. Head, Magnetic (HRPE901) ....................................... 6
2-6. Motor (M901) ............................................................. 6
3. ADJUSTMENTS
3-1. Mechanical Adjustments ............................................ 7
3-2. Electrical Adjustments ................................................ 7
4. DIAGRAMS
4-1. Block Diagrams .......................................................... 9
4-2. Printed Wiring Boards .............................................. 10
4-3. Schematic Diagram....................................................11
5. EXPLODED VIEWS
5-1. Cabinet (Rear) Section.............................................. 13
5-2. Cabinet (Front) Section ............................................ 14
5-3. Mechanism Deck Section ......................................... 15
6. ELECTRICAL PARTS LIST ........................................ 16
Ver 1.2
• How to recognize former type and new type mechanism
deck
Former Type New Type

3
M-450/455
SECTION 1
GENERAL This section is extracted from
instruction manual.

4
M-450/455 SECTION 2
DISASSEMBLY
2-1. CASSETTE HOLDER ASSY
2-2. CABINET (REAR)
zCAUTIONS DURING ASSEMBLY
Align these switches and knobs
S601 tKnob (pause)
Lever (F/R) t Knob (FR)
Cassette holder ASSYSet Cabinet (rear) Cabinet (front) Main board, Mechanism deck Head, magnetic (HRPE901)
Motor (M901)
r
The equipment can be removed using the following procedure.
Cassette holder ASS
Y
2
3
1 Eject
4 Claws
Cabinet (front)
4
1
Lever (F/R)
Lid, battery case
Knob (FR)
Knob (pause)
Cabinet (rear)
S601
2 Screw
(B1.7
× 5)
3 Four screws
(1.7
× 16)
5 Claw
6

5
M-450/455
2-3. CABINET (FRONT)
2-4. MAIN BOARD, MECHANISM DECK
Main board
Mechanism deck
1 Scre
w
3 Remove solder
(four places).
1 Screw
2 Remove solder
(four places)
4
Head flexible board
zNOTE DURING ASSEMBLY
Align S902 and knob (tape speed).
Knob (tape speed)
Cabinet (front)
2 Mic case
1 Remove solder
(two places)
To speaker
3
S902

6
M-450/455
1 claw
3 M1.4, special head
4 M1.4, special head
2 arm (pinch roller) assy
5 head, magnetic
(HRPE901)
2-5. HEAD, MAGNETIC (HRPE901)
2-6. MOTOR (M901)
belt (flywheel)
belt (counter, tape)
How to apply the belts
belt (flywheel)
M901
flywheel assy
1
3 Motor (M901)
Mechanism deck
2 Two screws
Ver 1.2

7
M-450/455
3-2. ELECTRICAL ADJUSTMENTS
Standard Output Level
Output terminal EAR
Load impedance 8Ω
Output level 78mV (– 20dB)
TestTape
Type Signal Used for Tape speed
(cm/s)
S-2-A030A 3kHz, –20dB Azimuth Adjustment 2.4
WS-24 3kHz, –10dB Tape Speed Adjustment 2.4
WS-12 1.2
PRECAUTION
Record/Playback/Erase Head Azimuth Adjustment
Switch position
VOLUME : Mechanical center
TAPE SPEED switch : 2.4cm/s
VOR switch : OFF
Procedure :
– FWD/REV playback –
set
test tape
S-2-A030A
(3kHz, –20dB) level mete
r
earphone jack
8
Ω
rRotate the screw to adjust level meter reading to the maximum.
Note : Adjust to the maximum peak though there may be two or
three peaks
Adjustment Location :
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Before adjusting, clean the following parts with a piece of cot-
ton moistened with alcohol.
record/playback/erase head pinch roller
rubber belt capstan
2. Demagnetize the record/playback/erase head using a head de-
magnetizer.
3. Do not use a magnetized screwdriver for adjustments.
4. After adjusting, apply screw-locking compound to the adjusted
parts.
5. Unless specified otherwise, use a specified voltage (3V DC) to
perform the adjustments.
Torque Measurement
Tape Speed switch : 2.4cm/s
Mode Torque Meter Meter Reading
Forward CQ-103M 0.5 –0.98mN • m
(5 – 10 g • cm)
(0.07 to 0.138 oz• inch)
Fast Forward CQ-201M 0.5 –0.98mN • m
(5 – 10 g • cm)
(0.07 to 0.138 oz• inch)
Tape Tension Measurement
Tape Speed switch : 2.4cm/s
Mode Torque Meter Meter Reading
FWD CQ-403M more than 25 g
(more than 0.9 oz)
SECTION 3
ADJUSTMENTS
0db=0.775V
head azimuth
adjutment scre
w

8
M-450/455
Tape Speed Adjustment
Switch position
VOLUME : Mechanical center
VOR switch : OFF
Procedure :
After adjusting the 2.4cm/s speed, adjust the 1.2cm/s speed.
– Playback –
set
Test tape
WS-24, WS-12
(3kHz, –10dB)
speed checker
or
frequency counter
earphone jack
8
Ω
Adjustment Value :
Adjustment Speed Frequency counter
Part
RV602 2.4cm/s 2,880 – 3,120Hz
RV601 1.2cm/s 2,850 – 3,150Hz
Frequency difference between the beginning and the end of the
tape should be within 0.5%.
2.4cm/s (15Hz)
1.2cm/s (15Hz)
Adjustment Location :
– Back view –
RV602
2.4cm
RV601
1.2cm
speed adjustable resistor
s
Plate, blind

99
M-450/455
4-1. BLOCK DIAGRAMS
SECTION 4
DIAGRAMS
3
414
6
511
9
2
5
6
14
15
4
13
7
1
16
DRIVE
FEEDBACK
EQ RC-
NETWORK INITIAL
MUTE
Q105
OSC
LOGIC
CIRCUITY
S101 (4/4)
REC PB
S101 (3/4)
REC PB
RIPPLE
FILTER
15
8
ALC
MIC901
MIC
S101
(1/4,2/4)
REC PB
Q101
Q102 Q104 Q106
+VDD
M901
CAPSTAN/
REEL
MOTOR
HRPE901
REC/PB
HEAD
S601
OFF
PAUSE
ERASE
HEAD
+VCC
+B
U OUT
V OUT
W OUT
VCC
U
V
W
RV601
TAPE SPEED
(1.2cm)
RV601
+VCC
VCC
VREF
IN+
S/S
S902 (1/2)
TAPE SPEED
1.2cm 2.4cm
RV602
TAPE SPEED
(2.4cm)
S902 (2/2)
TAPE SPEED
2.4cm
1.2cm
PRE AMP
IC101 (1/2)
BTL POWER AMP
IC101 (2/2)
VREF
RF IN
PRE OUT
RF OUT
+VCC
PRE+IN
PRE-IN POW+INA
POW-INA
POW+INB
POW-INB
POW
OUTA
PWB
OUTB
ALC IN
Q103
MUTE
MOTOR DRIVER
IC601
+B
S102
(POWER)
J101
EAR
SP901
(SPEAKER)
RV101
VOL w
PAUSE .
D301
BATT
J901
DC IN 3V
!
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
• SIGNAL PATH
: REC
: PB

M-450/455
10 10
SP901
SPEAKER
J101
EAR
RV101
w
VOL
MIC901
MIC
D301
BATT
HRPE901
ERASE
HEAD
RECORD/
PLAYBACK
HEAD
OFF PAUSE
PAUSE
t
.
S601
BLK
ORG
WHT
RED
M901
CAPSTAN/
REEL
MOTOR
M
S102
(POWER)
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
J901
DC IN 3V
S902
2.4cm 1.2cm
TAPE SPEED
t
IC601
THP601
C601
C603
C609
C608
C605
C604
R152
R151
C104
IC101
Q104
C610
C602
R153
R612
R613
Q103
Q105
D101
Q102
R601
R602
R603
R604
R605
R606
R607
R608
RV602
R131
R132
R133
R135
R137
R138
R139
R140
R141
R142
R143
R144
C131
C132
C133
C136
C137
C138
C139
C140 C141
C142
C143
C145
C147
C152
R609
R610
R110
R111
R112 R113
R114
R115
R116
R119
R120
R122
R124
R127
C112
C113
C114
C115
C116
C105
C108
C117
C101
R108
R105
C102
R104
R102
R136
C134
Q106
R117
R118
R103
R123
RV601
C135
C109
R301
R302
C144
JC302
JC156
JC604
JC605
JC157 JC301
JC101
JC102
JC159
JC158
JC105
JC103
JC108
JC104
JC138
JC140
JC139
JC137
JC133
JC109
JC134
JC136 JC135
JC142
JC141
JC153
JC602
JC155
JC154
JC143
JC603
JC601
JC131
JC132
JC110
C119
JC111
JC112
R128
Q101
C151
C607
C146
BLK
RED
11
(11)
1-683-292-
MAIN BOARD
16 9
1
1510
11
15
20
8
(4/4)(3/4)
S101
REC
PB
(2/4)(1/4)
t
23 4 5 6
A
1
B
C
D
4-2. PRINTEDWIRING BOARDS – MAIN BOARD –
Note:
•X: parts extracted from the component
side.
•b: Pattern from the side which enables
seeing.
• Semiconductor
Location
Ref. No. Location
D101
D301
IC101
IC601
Q101
Q102
Q103
Q104
Q105
Q106
A-4
D-2
B-3
C-5
B-3
B-3
C-3
B-3
C-4
B-3

11 11
M-450/455
4-3. SCHEMATIC DIAGRAM
D301
R301
R302
JC301 JC302
JC601
R605
C605
C604
R606
C608
C609
JC604
JC605
R613
R612
RV602
RV601
JC603
C610
R610
C603
R604
R603
R602
C602
R601
C601
IC601
S601
Q105
R143
Q103
C147
R144
JC133 JC132
JC131
R140 C139
R141
C140
C142
C143
C141 C144
C145
R142
JC141 JC142 JC143
C146
R153
R152
R151
J101
JC140 JC139
JC138
JC158 JC159
JC157
JC156
C152
C151
JC155
JC154
JC153
S102
J901
JC137
JC136
JC135
C138
R139
C137
C136
R138
C135
R136
C134
R135
JC134
R132
R133
C131
R131
RV101
C133
C132
C113
C114
JC110 JC111 JC112
R108
R110
R111 R112
R114
R113
C112 R128
JC103
R115
R116 R117
R118
R119
R120 C115 C119
R122 R123
R124
S902(2/2)
C109
JC102
JC101
R105
R104
C105
R102
C101
C102
R103
C104
C108
JC104
JC105
JC108
C117
S101(1/4) S101(2/4)
R127
JC109
S101(4/4)
D101
C116
Q106
R608
R607
JC602
C607
R609
Q104
SP901
R137
W901
W902
S902(1/2)
MIC901
Q101
Q102 IC101
THP601
S101(3/4)
L-34HD
220
1k
1k
0.047
0.047
1M
0.047
0.047
1k
10k
4.7k
4.7k
0.22
4.7k
0.047
10k
1k
0
2.2
100k
0.47
LB1979V
UN5114
10k
2SC4213
10
10V
4.7k
10k 2200p
4.7k
1000p
10
10V 0.01
0.01 47
6.3V
1000p
47k
47
4V
100
22
22
1000p
220
4V
1
2.2M
10
10V
0.01
2.2
100
6.3V
4.7
0.1
2.2k
0
470
0.47
220
10k
0.22
0.22
10
10V
1
2.2k
4.7k
4.7k 10k
1k
22k
2.2 2.2k
1k
100k 220k
0
10k
22k 0.022 0
010k
4.7k
47
6.3V
1k
4.7k
0.047
4.7k
0.1
0.1
10k
4700p
0
1
16V
22
02CZD 2.0
0.022
UN5115
1M
1M
100
4V
4.7k
UN5115
2.2k
MIC
2SC4213
UN5214 NJM2775AM(TE2)
DRY BATTERY
EAR
HR+
HR-
HE+
HE-
VCC
U
V
W
PAUSE
PAUSE
HRPE901
PB REC
PB REC PB REC
PB
(POWER)
DC IN 3V
MOTOR
M901
CAPSTAN/REEL
TAPE SPEED
2.4cm
TAPE SPEED
1.2cm
TAPE SPEED
1.2cm
2.4cm
OFF
TAPE SPEED
1.2cm
2.4cm
VOL
HEAD
PLAYBACK
RECORD
HEAD
ERASE
2PCS,3V
(IEC DESIGNATION R6)
SPEAKER
BATT
POWER AMP
PRE AMP,
BTL
DRIVER
MOTOR
MUTE
INITIAL
MUTE
SWITCH SWITCH
SWITCH
SWITCH
REC

M-450/455
12 12
Note on Schematic Diagram :
Note :
• All capacitors are in µF unless otherwise noted. pF: µµF
50WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise specfied.
•A: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power supply from
battery terminal.
• Voltage are dc with respect to ground under no-signal conditions.
no mark : PLAY
( ): REC
• Voltages are taken with a VOM ( Input impedance 10MΩ).
Voltage variations may be noted due to normal production tole ances.
• Signal path.
E: PB
a: REC
FC GND
VCC
VCC
FC
WB
VCC
NC
UOUT
VOUT
WOUT
P-GND
VB
UB
GND
TO
CONTROL
BLOCKS
TO
EACH
BLOCKS
RI OUT VSP IN+ VREF S/S COM OSC
75
4
31 2 6 8 9 10
1112131415161820 19
STARTING
DETECT
POWER
SUPPLY
BIAS
OSCILLATING
CIRCUIT
SPEED CONTROL
REFERENCE VOLTAGE
REFERENCE
VOLTAGE
CURRENT
DETECT
SPEED
DETECT
WAVEFORM DETECT
COMMUTATION STARTING LOGIC
SOFT SWITCH
PRE DRIVER
+
–
17
IC601 LB1979VS-TLM

13
M-450/455
SECTION 5
EXPLODEDVIEWS
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
5-1. CABINET (REAR) SECTION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1 3-236-700-21 CABINET (REAR) (450:CH,E,EE)
1 3-236-700-31 CABINET (REAR) (455:E)
1 3-236-700-61 CABINET (REAR) (450:1E)
1 3-236-700-71 CABINET (REAR) (455:1E)
2 3-035-255-01 SCREW (1.7X16) (450)
2 3-035-255-11 SCREW (1.7X16) (455)
3 3-358-363-41 PLATE, BLIND (450)
3 3-358-363-71 PLATE, BLIND (455)
4 3-236-708-01 KNOB (PAUSE) (455)
4 3-236-708-11 KNOB (PAUSE) (450)
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
5 3-236-707-01 KNOB (FR) (455)
5 3-236-707-11 KNOB (FR) (450)
6 3-318-203-71 SCREW (B1.7X5), TAPPING (450)
6 3-318-203-72 SCREW (B1.7X5), TAPPING (455)
7 3-236-703-01 LID, BATTERY CASE (455)
7 3-236-703-11 LID, BATTERY CASE (450)
8 3-037-004-01 PAPER (A), SHIELD
*9 3-037-556-01 SHEET (A), GROUND
• Abbreviation
CH : Chinese
EE : East European
E : Indication of country of origin
1E : No indication of country of origin
9
8
7
6
54
32
2
1
Cabinet (front) section

14
M-450/455
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51 3-704-197-31 LOCK, SERRAT IB
52 3-831-441-99 SPACER, KNOB
*53 A-3021-746-A MAIN PC BOARD ASSY
54 3-236-716-01 TERMINAL (-), BATTERY
55 3-236-715-01 TERMINAL (+), BATTERY
56 3-031-376-01 BUTTON (REC)
57 3-031-375-01 BUTTON (PLAY) (455)
57 3-031-375-21 BUTTON (PLAY) (450)
58 3-031-374-01 BUTTON (STOP) (455)
58 3-031-374-21 BUTTON (STOP) (450)
59 3-034-792-01 SCREW, TAPPING (B2.0)
60 3-037-193-01 CUSHION (SP)
61 3-236-717-01 TERMINAL (+/-), BATTERY
62 3-236-699-21 CABINET (FRONT) (450)
62 3-236-699-31 CABINET (FRONT) (455)
63 X-3381-673-1 HOLDER ASSY, CASSETTE (450)
63 X-3381-674-1 HOLDER ASSY, CASSETTE (455)
64 3-238-573-01 KNOB (TAPE SPEED) (455)
64 3-238-573-11 KNOB (TAPE SPEED) (450)
65 3-236-713-01 CUSHION, MICROPHONE
66 3-039-027-01 SPACER (MIC)
67 3-236-712-01 CASE, MICROPHONE
68 3-037-192-01 SPACER (MIC)
69 3-044-225-01 SPACER
70 3-035-304-31 CUSHION
MIC901 1-542-386-11 MICROPHONE, ELECTRET CONDENSER
SP901 1-825-037-11 SPEAKER (3.6cm)
5-2. CABINET (FRONT) SECTION
62
61
70
58
57 56
55
53
51
52
68
51
60
66
67
65
64
63
59
SP901
MIC901
54 69

15
M-450/455
HRPE901
101
136
136
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
138
118
119
120 121
122
123 124
125
126
127 128
129
130
131
132
137
133
134
135
107
M901
136
101 3-028-965-01 SPRING (PINCH ARM), TORSION
103 3-704-197-71 SCREW (M1.4X4.5), LOCKING
104 3-028-960-01 SPRING (AZIMUTH), COMPRESSION
105 3-028-909-01 GUIDE (N), TAPE
*106 3-029-640-01 BRACKET (OW), HEAD
107 3-331-007-21 WASHER
108 3-350-989-01 WASHER
109 3-028-961-01 SPRING (BUTTON), COMPRESSION
110 3-028-924-01 LEVER (PLAY)
111 X-3376-235-1 ARM (PINCH ROLLER) ASSY
112 3-046-281-01 LEVER (POWER SW) (B)
113 3-028-940-01 LEVER (SRS)
114 3-028-938-01 LEVER (SLIDE)
115 3-578-224-00 WASHER
116 X-3376-227-1 LEVER (F/R) ASSY
117 X-3376-228-1 LEVER (TU) ASSY
118 3-029-634-01 BEARING
119 X-3376-231-1 FLYWHEEL ASSY
120 3-377-420-11 BELT
121 X-3376-224-1 LEVER (REC) ASSY
122 3-029-641-01 SPRING, TORSION
123 3-028-957-01 SPRING (CAM GEAR),TENSION
124 3-028-966-03 GEAR (S-OFF-OW), CAM
125 X-3376-230-1 LIMITTER ASSY
126 3-028-955-01 SPRING (LOCK), TENSION
127 X-3377-535-4 LEVER (LOCK) ASSY
128 4-992-239-01 WASHER (A)
*129 3-028-967-01 LEVER (PAUSE RELEASE)
130 3-028-954-01 SPRING (SW LEVER), TENSION
131 3-321-813-71 WASHER, COTTER POLYETHYLENE
132 3-028-928-01 LEVER (EJECT)
133 3-028-964-01 SPRING (SLIDE), TORSION
134 4-926-562-01 WASHER, STOPPER
135 3-028-927-01 LEVER (STOP)
136 3-703-816-07 SCREW (M1.4), SPECICAL HEAD
137 X-3380-218-4 CHASSIS COMP ASSY (FORMER)
137 X-3382-245-2 CHASSIS (COMP) ASSY(B) (NEW)
138 3-378-078-11 SPACER (END DETECTION)
HRPE9011-500-722-11 HEAD, MAGNETIC (REC/PB/ERASE)
M901 1-763-236-22 MOTOR, DC (CAPSTAN/REEL) (including
PULLEY)(FORMER)
M901 1-763-236-31 MOTOR, DC (CAPSTAN/REEL) (including
PULLEY)(NEW)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
5-3. MECHANISM DECK SECTION
(MZ-455-99)
Ver 1.2

16
M-450/455
NOTE :
• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• RESISTORS
All resistors are in ohms
METAL : Metal-film resistor
METAL OXIDE :Metal oxide-film resistor
F : nonflammable
• Items marked “ * ”are not stocked since
they are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example :
uA.... : µA.... , uPA.... : µPA....
uPB.... : µPB.... , uPC.... : µPC....
uPD.... : µPD....
• CAPACITORS
uF : µF
• COILS
uH : µH
When indicating parts by reference num-
ber, please include the board.
SECTION 6
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
*A-3021-746-A MAIN BOARD, COMPLETE
*********************
<CAPACITOR>
C101 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C102 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C104 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V
C105 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C108 1-216-864-11 METAL CHIP 0 5% 1/16W
C109 1-110-569-11 TANTAL. CHIP 47uF 20% 6.3V
C112 1-135-834-91 CERAMIC CHIP 2.2 6.3V
C113 1-104-851-11 TANTAL. CHIP 10uF 20% 10V
C114 1-115-156-11 CERAMIC CHIP 1uF 10V
C115 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C116 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C117 1-135-177-21 TANTALUM CHIP 1uF 20% 20V
C119 1-216-864-11 METAL CHIP 0 5% 1/16W
C131 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C132 1-165-128-11 CERAMIC CHIP 0.22uF 16V
C133 1-165-128-11 CERAMIC CHIP 0.22uF 16V
C134 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C135 1-128-964-91 TANTAL. CHIP 100uF 20% 6.3V
C136 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C137 1-104-851-11 TANTAL. CHIP 10uF 20% 10V
C138 1-115-156-11 CERAMIC CHIP 1uF 10V
C139 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C140 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C141 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C142 1-104-851-11 TANTAL. CHIP 10uF 20% 10V
C143 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C144 1-110-569-11 TANTAL. CHIP 47uF 20% 6.3V
C145 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C146 1-104-400-21 ELECT 47uF 20% 4V
C146 1-126-154-11 ELECT 47uF 20% 6.3V
C147 1-104-851-11 TANTAL. CHIP 10uF 20% 10V
C151 1-124-434-00 ELECT 220uF 20% 4V
C152 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C601 1-117-863-11 CERAMIC CHIP 0.47uF 10% 6.3V
C602 1-135-834-91 CERAMIC CHIP 2.2 6.3V
C603 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C604 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C605 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C607 1-124-433-00 ELECT 100uF 20% 4V
C608 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C609 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C610 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
<DIODE>
D101 8-719-016-84 DIODE 02DZ2.0-TPH3
D301 8-719-059-97 LED L-34HD (BATT)
<IC>
IC101 6-701-379-01 IC NJM2775AM(TE2)
IC601 8-759-638-51 IC LB1979VS-TLM
<JACK>
J101 1-785-791-11 JACK (EAR)
J901 1-580-372-43 JACK,DC(POLARITY UNIFIED TYPE)
(DC IN 3V)
<JUMPER RESISTOR>
JC101 1-216-864-11 METAL CHIP 0 5% 1/16W
JC102 1-216-864-11 METAL CHIP 0 5% 1/16W
JC103 1-216-864-11 METAL CHIP 0 5% 1/16W
JC104 1-216-296-11 SHORT 0
JC105 1-216-864-11 METAL CHIP 0 5% 1/16W
JC108 1-216-864-11 METAL CHIP 0 5% 1/16W
JC109 1-216-864-11 METAL CHIP 0 5% 1/16W
JC110 1-216-296-11 SHORT 0
JC111 1-216-296-11 SHORT 0
JC112 1-216-296-11 SHORT 0
JC131 1-216-864-11 METAL CHIP 0 5% 1/16W
JC132 1-216-864-11 METAL CHIP 0 5% 1/16W
JC133 1-216-864-11 METAL CHIP 0 5% 1/16W
JC134 1-216-864-11 METAL CHIP 0 5% 1/16W
JC135 1-216-296-11 SHORT 0
JC136 1-216-296-11 SHORT 0
JC137 1-216-864-11 METAL CHIP 0 5% 1/16W
JC138 1-216-864-11 METAL CHIP 0 5% 1/16W
JC139 1-216-864-11 METAL CHIP 0 5% 1/16W
JC140 1-216-864-11 METAL CHIP 0 5% 1/16W
• Abbreviation
CH : Chinese
EE : East European
E : Indication of country of origin
1E : No indication of country of origin

17
M-450/455
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
JC141 1-216-296-11 SHORT 0
JC142 1-216-296-11 SHORT 0
JC143 1-216-296-11 SHORT 0
JC153 1-216-296-11 SHORT 0
JC154 1-216-296-11 SHORT 0
JC155 1-216-296-11 SHORT 0
JC156 1-216-296-11 SHORT 0
JC157 1-216-296-11 SHORT 0
JC158 1-216-296-11 SHORT 0
JC159 1-216-296-11 SHORT 0
JC301 1-216-296-11 SHORT 0
JC302 1-216-296-11 SHORT 0
JC601 1-216-296-11 SHORT 0
JC602 1-216-296-11 SHORT 0
JC603 1-216-864-11 METAL CHIP 0 5% 1/16W
JC604 1-216-864-11 METAL CHIP 0 5% 1/16W
JC605 1-216-864-11 METAL CHIP 0 5% 1/16W
<TRANSISTOR>
Q101 8-729-013-37 TRANSISTOR 2SC4213-AB-TE85L
Q102 8-729-402-93 TRANSISTOR UN5214
Q103 8-729-013-37 TRANSISTOR 2SC4213-AB-TE85L
Q104 8-729-420-53 TRANSISTOR UN5115
Q105 8-729-402-96 TRANSISTOR UN5114
Q106 8-729-420-53 TRANSISTOR UN5115
<RESISTOR>
R102 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R103 1-216-833-11 METAL CHIP 10K 5% 1/16W
R104 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R105 1-216-821-11 METAL CHIP 1K 5% 1/16W
R108 1-216-825-11 METAL CHIP 2.2K 5% 1/16W
R110 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R111 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R112 1-216-833-11 METAL CHIP 10K 5% 1/16W
R113 1-216-837-11 METAL CHIP 22K 5% 1/16W
R114 1-216-821-11 METAL CHIP 1K 5% 1/16W
R115 1-216-821-11 METAL CHIP 1K 5% 1/16W
R116 1-216-845-11 METAL CHIP 100K 5% 1/16W
R117 1-216-849-11 METAL CHIP 220K 5% 1/16W
R118 1-216-864-11 METAL CHIP 0 5% 1/16W
R119 1-216-833-11 METAL CHIP 10K 5% 1/16W
R120 1-216-837-11 METAL CHIP 22K 5% 1/16W
R122 1-216-864-11 METAL CHIP 0 5% 1/16W
R123 1-216-833-11 METAL CHIP 10K 5% 1/16W
R124 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R127 1-216-801-11 METAL CHIP 22 5% 1/16W
R128 1-216-825-11 METAL CHIP 2.2K 5% 1/16W
R131 1-216-813-11 METAL CHIP 220 5% 1/16W
R132 1-216-864-11 METAL CHIP 0 5% 1/16W
R133 1-216-817-11 METAL CHIP 470 5% 1/16W
R135 1-216-825-11 METAL CHIP 2.2K 5% 1/16W
R136 1-216-793-11 RES-CHIP 4.7 5% 1/10W
R137 1-216-825-11 METAL CHIP 2.2K 5% 1/16W
R138 1-216-789-11 METAL CHIP 2.2 5% 1/16W
R139 1-216-861-11 METAL CHIP 2.2M 5% 1/16W
R140 1-216-833-11 METAL CHIP 10K 5% 1/16W
R141 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R142 1-216-841-11 METAL CHIP 47K 5% 1/16W
R143 1-216-833-11 METAL CHIP 10K 5% 1/16W
R144 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R151 1-216-801-11 METAL CHIP 22 5% 1/16W
R152 1-216-801-11 METAL CHIP 22 5% 1/16W
R153 1-216-809-11 METAL CHIP 100 5% 1/16W
R301 1-216-813-11 METAL CHIP 220 5% 1/16W
R302 1-216-821-11 METAL CHIP 1K 5% 1/16W
R601 1-216-845-11 METAL CHIP 100K 5% 1/16W
R602 1-216-864-11 METAL CHIP 0 5% 1/16W
R603 1-216-821-11 METAL CHIP 1K 5% 1/16W
R604 1-216-833-11 METAL CHIP 10K 5% 1/16W
R605 1-216-821-11 METAL CHIP 1K 5% 1/16W
R606 1-216-857-11 METAL CHIP 1M 5% 1/16W
R607 1-216-857-11 METAL CHIP 1M 5% 1/16W
R608 1-216-857-11 METAL CHIP 1M 5% 1/16W
R609 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R610 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R612 1-216-833-11 METAL CHIP 10K 5% 1/16W
R613 1-216-821-11 METAL CHIP 1K 5% 1/16W
<VALIABLE RESISTOR>
RV101 1-227-460-11 RES, VAR, CARBON 10K (VOLw)
RV601 1-238-663-11 RES, ADJ, CARBON 4.7K (TAPE SPEED 1.2cm)
RV602 1-238-663-11 RES, ADJ, CARBON 4.7K (TAPE SPEED 2.4cm)
<SWITCH>
S101 1-771-673-11 SWITCH, SLIDE(PB/REC)
S102 1-572-688-61 SWITCH, PUSH (1 KEY) (POWER)
S601 1-572-922-11 SWITCH, SLIDE (PAUSE.)
S902 1-571-277-51 SWITCH, SLIDE (TAPE SPEED)
<THERMISTOR>
THP601 1-803-124-11 THERMISTOR, POSITIVE
**************************************************************
MISCELLANEOUS
*************
HRPE9011-500-722-11 HEAD, MAGNETIC (REC/PB/ERASE)
M901 1-763-236-22 MOTOR, DC (CAPSTAN/REEL) (including
PULLEY)(FORMER)
M901 1-763-236-31 MOTOR, DC (CAPSTAN/REEL) (including
PULLEY)(NEW)
MIC901 1-542-386-11 MICROPHONE, ELECTRET CONDENSER
SP901 1-825-037-11 SPEAKER (3.6cm)
*************************************************************
ACCESSORIES
************
3-241-559-51 MANUAL, INSTRUCTION (ENGLISH, RUSSIAN)
(450:EE)
3-241-559-61 MANUAL, INSTRUCTION (POLISH, CZECH,
HUNGARIAN, SLOVAK) (450:EE)
3-241-559-71 MANUAL, INSTRUCTION (ENGLISH,
SIMPLIFIED CHINESE) (450:CH)
3-241-559-81 MANUAL, INSTRUCTION (ENGLESH,
TRADITIONAL CHINESE) (450:1E,455:1E)
3-241-560-21 MANUAL, INSTRUCTION (ENGLISH, SPANISH,
FRENCH, ITALIAN, PORTUGUESE) (450:E,455:E)
Ver 1.2

M-450/455
REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.
Ver. Date Description of Revision
1.0 2002.02 New
1.1 2004.02 Addition of New type mechanism deck. (SPM-03066)
1.2 2004.05 Addition of “How to recognize the mechanism deck”.
Correction of M901 part No. and illustration. (SPM-04042)