Sony TCM-323 - Micro Portable Recorder User manual

SERVICE MANUAL
CASSETTE-CORDER
US Model
Canadian Model
AEP Model
E Model
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MT-323-118
SPECIFICATIONS
TCM-323
Ver 1.2 2004.03
9-923-304-12 Sony Corporation
2004C05-1 Personal Audio Company
© 2004.03 Published by Sony Engineering Corporation

– 2 –
In this set, the S102 (power) detects REC/PLAYBACK on.
It is mounted on the MAIN board, and therefore the REC/PLAY-
BACK on cannot be detected with the MAIN board removed.
When making an operation check and voltage check of mechani-
cal deck with the MAIN board removed, fix the S102 at turn on.
SECTION 1
SERVICING NOTES
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.
[MAIN BOARD] (Conductor Side)
IC101
IC102
IC601
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 2
2. GENERAL .................................................................. 3
3. DISASSEMBLY ......................................................... 4
4. MECHANICAL ADJUSTMENTS....................... 7
5. ELECTRICAL ADJUSTMENTS......................... 8
6. DIAGRAMS
6-1. Block Diagram ................................................................ 9
6-2. Schematic Diagram ......................................................... 11
6-3. Printed Wiring Board ...................................................... 13
7. EXPLODED VIEWS................................................ 14
8. ELECTRICAL PARTS LIST ............................... 17

– 3 –
SECTION 2
GENERAL This section is extracted from
instruction manual.

– 4 –
CABINET (REAR), CASSETTE LID
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
9 cassette lid
8 cassette spring
5 strap
3 claw
3 four claws
2 screw
(IB lock)
4 cabinet (rear)
1 three screws
(B1.7
× 9)
7 boss
7 boss
6 Remove the two solders
speaker cords.
SET CABINET (REAR), CASSETTE LID MAIN BOARD, MECHANISM DECK (MT-323-118)
BELT

– 5 –
MAIN BOARD, MECHANISM DECK (MT-323-118)
BELT
6 claw
2 screw
(1.7)
3 screw
(M1.4)
4 MAIN board
7 mechanism deck
(MT-323-118)
5 three screws
(IB lock)
1 Remove the two solders
electret condenser microphone
(MIC901).
1 Remove the two solders
magnetic head (HRP901).
1 Remove the two solders
motor (M901).
1 belt (capstan)
2 belt (FR)

– 6 –
INSTALLATION MAIN BOARD
On installation MAIN board, adjust to the S101 and
the S102.
screw
(1.7) screw
(M1.4)
MAIN boar
d
S101 (REC/PB)
S102
(POWER)
lever (REC)

– 7 –
SECTION 4
MECHANICAL ADJUSTMENTS
Tape Tension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belt
capstan idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (2.5V) unless otherwise noted.
Torque Measurement
Mode Torque Meter Meter Reading
FWD more than 20 g•cm
CQ-102C (more than 0.28 oz•inch)
Forward Back Tension 0.5 - 3 g•cm
(0.007 - 0.04 oz•inch)
FF CQ-201B more than 50 g•cm
REW (more than 0.69 oz•inch)
Mode Tension Meter Meter Reading
FWD CQ-403C more than 50 g
(more than 1.76 oz)

– 8 –
SECTION 5
ELECTRICAL ADJUSTMENTS
Precaution
• Supplied voltage: 2.5 V
• Switch and control position
PAUSE switch (S105): OFF
VOL (RV101): mechanical mid
TestTape
Record/Playback Head Azimuth Adjustment
Procedure:
Mode: playback
1. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note: Several peaks may appear, but take the maximum.
2. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location:
0 dB=0.775 V
Tape Speed Adjustment
Procedure:
Mode: playback
1. Play back WS-48A (tape end part) and adjust RV601 so that
the frequency counter reading becomes 3,000 ± 15 Hz.
2. Play back WS-48A tape the beginning and the end part, check
that the frequency counter reading is within same standard of
step1.
Adjustment Location:
[MAIN BOARD] (Conductor Side)
level mete
r
test tape
P-4-A063
(6.3 kHz, –10 dB) 10 k
Ω
set
EAR jack
+
–
frequency
counter
Standard tape for adjusting
WS-48A
(3 kHz, 0 dB) 10 k
Ω
EAR jack
set
+
–
Type Signal Used for
P-4-A063 6.3 kHz, –10 dB head azimuth adjustment
WS-48A 3 kHz, 0 dB tape speed adjustment
IC101
IC601
RV601
adjustment screw

Ver 1.2

Ver 1.2

Ver 1.2

– 14 –
SECTION 7
EXPLODED VIEWS
• 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 num-
ber in the exploded views are not supplied.
• Accessories and packing materials are given
in the last of the electrical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑↑
Parts Color Cabinet's Color
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
(1) CABINET SECTION
1 3-318-382-31 SCREW (1.7), TAPPING
2 3-345-648-01 SCREW (M1.4), TOOTHED LOCK
*3 A-3021-006-A MAIN BOARD, COMPLETE
4 3-924-741-01 TERMINAL, PLUS
5 3-936-973-01 TERMINAL, MINUS
6 3-924-744-01 SPRING(CLAW DETECTION), TENSION
7 3-924-743-01 CLAW, ERASING PROTECTION
8 3-334-565-41 SCREW (B1.7), TAPPING
9 3-924-745-01 BAR, GROUND
10 3-924-740-01 HOLDER, MICROPHONE
11 3-924-763-01 CUSHION (MICROPHONE)
12 3-831-441-11 CUSHION, CABINET UPPER 10X7X0.5
13 4-969-980-21 SCREW (IB LOCK)
14 3-578-101-31 PLATE, ORNAMENTAL
15 3-019-363-01 CABINET (FRONT)
16 3-924-739-01 SPRING, CASSETTE
17 X-3375-536-1 LID SUB ASSY, CASSETTE
18 4-017-441-01 CUSHION (B)
*19 3-924-757-01 BRACKET (SPEAKER)
21 X-3375-808-1 LID ASSY, BATTERY CASE
22 3-924-747-11 KNOB (PAUSE)
23 3-019-442-01 CABINET (REAR)
24 3-318-203-92 SCREW (B1.7X9), TAPPING
25 3-366-890-51 SCREW (IB LOCK)
26 3-831-441-99 SPACER, KNOB
*27 3-592-351-01 PAPER, VIBRATION PROOF (B)
MIC901 1-542-136-11 MICROPHONE, ELECTRET CONDEDSER (MIC)
SP901 1-544-657-11 SPEAKER (3.6CM)
13
12
14
15 16
27
22
6
7
10
11
MIC901
MT-323-118
9
8
5
4
1
26
2
26
26
325
24
23
21
118
19
26
17
SP901
Ver 1.1

– 15 –
51 X-3370-386-1 PINCH ROLLER ASSY
52 3-925-146-11 BUTTON (FF) ())
53 3-925-147-01 BUTTON (REW) (0)
54 3-925-148-11 BUTTON (PLAY) (()
55 3-925-145-01 BUTTON (REC) (r)
56 3-924-738-01 BUTTON (STOP) (p)
57 3-703-925-21 SCREW (M1.4)
58 3-924-625-01 LEVER (HEAD)
59 3-924-645-01 BRACKET (HEAD)
60 3-924-685-01 SPRING (AZIMUTH), COMPRESSION
61 3-704-197-91 SCREW (IB LOCK)
62 3-375-135-01 SCREW (1.4), SPECIAL
63 3-376-177-01 SCREW (M1.4X3.8)
64 3-925-107-01 SPRING (IDLER), COMPRESSION
65 3-924-637-01 GEAR (FF)
66 3-924-673-01 GEAR (S REEL)
67 3-924-674-01 SPRING (B. T), COMPRESSION
68 3-924-641-01 GEAR (T REEL)
69 3-924-726-01 SPRING (M GROUND), TORSION
70 3-924-681-01 BELT (CAPSTAN)
71 3-925-109-01 CUSHION (MOTOR)
72 3-925-108-01 SCREW (MOTOR)
73 3-924-644-01 SPRING (POWER TENSION), TENSION
74 3-348-160-11 SCREW (M1.4X1.6), PRECISION PAN
HE901 1-500-232-11 HEAD, MAGNETIC (ERASE)
HRP901 1-500-073-51 HEAD, MAGNETIC (RECORD/PLAYBACK)
M901 1-698-588-11 MOTOR, DC (CAPSTAN/REEL)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
(2) MECHANISM DECK SECTION-1
(MT-323-118)
63
62
61
60
59
58
74
64 65
66
67
69
68
M901
70
71
72
73
52
53
54
55
56
51
not
supplied
HE901
57
HRP901

– 16 –
101 3-321-483-11 RING, RETAINING (0.25)
102 3-315-495-31 WASHER
103 X-3370-384-1 FLYWHEEL ASSY
104 3-924-623-01 LEVER (PLAY)
105 3-924-621-01 LEVER (REW)
106 3-924-620-01 LEVER (FF)
107 X-3370-388-1 TABLE ASSY, FELT
108 3-924-642-01 SPRING (FR), TORSION
109 3-924-629-01 LEVER (DETECTION)
110 3-925-207-01 SPRING (S. OFF), TENSION
111 3-924-630-01 LEVER (S.OFF)
112 X-3370-387-1 LEVER ASSY, IDLER
113 3-924-682-01 BELT (FR)
114 X-3370-385-1 PULLEY (FR) ASSY
115 3-924-628-01 LEVER (FR)
116 3-924-633-01 SPRING (STOP), TENSION
117 3-924-622-01 LEVER (STOP)
118 3-924-643-01 SPRING (PR), TORSION
119 3-924-684-01 SPRING (LOCK PLATE), TENSION
120 3-924-619-01 LEVER (SW)
121 3-924-639-01 LEVER (CR)
122 3-924-618-01 LEVER (LOCK)
123 3-925-208-01 SPRING (REC), TENSION
124 3-924-624-01 LEVER (REC)
125 X-3370-227-1 CHASSIS ASSY
126 3-924-613-01 GEAR (FR)
127 3-024-378-01 SPRING (FR LEVER), TORSION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
(3) MECHANISM DECK SECTION-2
(MT-323-118)
113
114
127
101
115
122
119
117
116
112
101
111110
109
107
108
106
105 104
124
123
118
125
126
101
102
102
103
not
supplied
120
121

– 17 –
SECTION 8
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark
NOTE:
• Due to standardization, replacements in the
parts list may be different from the parts speci-
fied in the diagrams or the components used
on the set.
• -XX and -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 order-
ing 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
Ref. No. Part No. Description Remark
MAIN
When indicating parts by reference
number, please include the board.
*A-3021-006-A MAIN BOARD, COMPLETE
*********************
< CAPACITOR >
C101 1-104-357-11 ELECT 47uF 20% 6.3V
C102 1-104-396-11 ELECT 10uF 20% 16V
C103 1-164-222-11 CERAMIC CHIP 0.22uF 25V
C104 1-126-159-11 ELECT 0.47uF 20% 50V
C105 1-163-081-00 CERAMIC CHIP 0.22uF 25V
C106 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C107 1-104-396-11 ELECT 10uF 20% 16V
C108 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V
C109 1-162-638-11 CERAMIC CHIP 1uF 16V
C110 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C111 1-164-232-11 CERAMIC CHIP 0.01uF 50V
C112 1-126-163-11 ELECT 4.7uF 20% 50V
C113 1-164-182-11 CERAMIC CHIP 0.0033uF 10% 50V
C115 1-104-357-11 ELECT 47uF 20% 6.3V
C116 1-104-411-11 ELECT 1uF 20% 50V
C117 1-126-163-11 ELECT 4.7uF 20% 50V
C118 1-163-018-00 CERAMIC CHIP 0.0056uF 5% 50V
C119 1-104-357-11 ELECT 47uF 20% 6.3V
C120 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C121 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C122 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C123 1-124-434-00 ELECT 220uF 20% 4V
C124 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C125 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C127 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C129 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C506 1-104-396-11 ELECT 10uF 20% 16V
C601 1-104-411-11 ELECT 1uF 20% 50V
C602 1-104-411-11 ELECT 1uF 20% 50V
C603 1-164-346-11 CERAMIC CHIP 1uF 16V
C604 1-163-038-00 CERAMIC CHIP 0.1uF 25V
< DIODE >
D401 8-719-057-27 LED L-132XHD (BATT)
< IC >
IC101 8-759-339-54 IC NJM-2128M-TE2
IC601 8-759-804-43 IC LA5521M
< JACK >
J102 1-766-847-11 JACK (EAR)
< SHORT >
JC101 1-216-295-00 SHORT 0
JC102 1-216-296-00 SHORT 0
JC103 1-216-296-00 SHORT 0
JC104 1-216-295-00 SHORT 0
JC105 1-216-296-00 SHORT 0
JC106 1-216-296-00 SHORT 0
JC107 1-216-296-00 SHORT 0
JC108 1-216-295-00 SHORT 0
JC109 1-216-296-00 SHORT 0
JC110 1-216-296-00 SHORT 0
JC111 1-216-296-00 SHORT 0
JC112 1-216-296-00 SHORT 0
JC113 1-216-296-00 SHORT 0
JC114 1-216-296-00 SHORT 0
JC115 1-216-296-00 SHORT 0
< TRANSISTOR >
Q505 8-729-014-12 TRANSISTOR RN1311-TE85L
< RESISTOR >
R101 1-216-037-00 METAL CHIP 330 5% 1/10W
R102 1-216-073-00 METAL CHIP 10K 5% 1/10W
R103 1-216-065-00 RES,CHIP 4.7K 5% 1/10W
R104 1-216-113-00 METAL CHIP 470K 5% 1/10W
R105 1-216-009-00 METAL CHIP 22 5% 1/10W
R106 1-216-308-00 METAL CHIP 4.7 5% 1/10W
R107 1-216-067-00 METAL CHIP 5.6K 5% 1/10W
R108 1-216-073-00 METAL CHIP 10K 5% 1/10W
R110 1-216-073-00 METAL CHIP 10K 5% 1/10W
R111 1-216-065-00 RES,CHIP 4.7K 5% 1/10W
R113 1-216-045-00 METAL CHIP 680 5% 1/10W
R114 1-216-019-00 METAL CHIP 56 5% 1/10W
R116 1-216-198-00 RES,CHIP 1K 5% 1/8W
R121 1-216-609-11 METAL CHIP 18 0.5% 1/10W
R122 1-216-041-00 METAL CHIP 470 5% 1/10W
R123 1-216-089-00 RES,CHIP 47K 5% 1/10W
R401 1-216-031-00 METAL CHIP 180 5% 1/10W
R403 1-216-047-00 RES,CHIP 820 5% 1/10W
R602 1-216-065-00 RES,CHIP 4.7K 5% 1/10W
R603 1-216-089-00 RES,CHIP 47K 5% 1/10W

– 18 –
Ref. No. Part No. Description Remark
MAIN
TCM-323
R605 1-216-049-11 RES,CHIP 1K 5% 1/10W
R606 1-216-073-00 METAL CHIP 10K 5% 1/10W
< VARIABLE RESISTOR >
RV101 1-223-293-11 RES, VAR, CARBON 50K (VOL)
RV601 1-238-663-11 RES, ADJ, CARBON 4.7K
< SWITCH >
S101 1-572-964-11 SWITCH, SLIDE (REC/PB)
S102 1-771-092-21 SWITCH, PUSH (1 KEY) (POWER)
S601 1-572-922-11 SWITCH, SLIDE (PAUSE)
< THERMISTOR >
TH601 1-808-819-11 THERMISTOR, NTC (2125)
THP601 1-810-007-11 THERMISTOR, POSITIVE
************************************************************
MISCELLANEOUS
**************
HE901 1-500-232-11 HEAD, MAGNETIC (ERASE)
HRP901 1-500-073-51 HEAD, MAGNETIC (RECORD/PLAYBACK)
M901 1-698-588-11 MOTOR, DC (CAPSTAN/REEL)
MIC901 1-542-136-11 MICROPHONE, ELECTRET CONDEDSER (MIC)
SP901 1-544-657-11 SPEAKER (3.6CM)
************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
3-862-170-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH)
3-862-170-21 MANUAL, INSTRUCTION (GERMAN, DUTCH,
ITALIAN, SWEDISH, FINNISH) (AEP)
3-862-170-31 MANUAL, INSTRUCTION
(SPANISH, PORTUGUESE) (AEP, East European)
3-862-170-41 MANUAL, INSTRUCTION (SPANISH, ITALIAN)
(UK)
3-862-170-81 MANUAL, INSTRUCTION (ENGLISH, GERMAN,
POLISH, RUSSIAN, HUNGARIAN, CZECH)
(East European)

– 19 –
TCM-323
MEMO

TCM-323
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 1998.01 New
1998.02 CORRECTION-1
1998.04 CORRECTION-2
1.1 1998.04 Reflection of the contents of CORRECTION-1, CORRECTION-2
1.2 2004.03 Addition of DIAGRAMS