Sony TCM-36/459V User manual

SERVICE MANUAL
CASSETTE-CORDER
US Model
Canadian Model
AEP Model
E Model
Chinese Model
TCM-459V
Tourist Model
TCM-36/459V
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MT-459V-118
SPECIFICATIONS
TCM-36/459V
Photo: TCM-459V
Ver 1.22004.03
9-923-317-12 Sony Corporation
2004C05-1 Personal Audio Company
© 2004.03 Published by Sony Engineering Corporation

– 2 –
SECTION 1
GENERAL
TABLE OF CONTENTS
1. GENERAL ................................................................... 2
2. DISASSEMBLY ......................................................... 3
3. MECHANICAL ADJUSTMENTS....................... 5
4. ELECTRICAL ADJUSTMENTS......................... 6
5. DIAGRAMS
5-1. Block Diagram ................................................................ 7
5-2. Printed Wiring Boards..................................................... 9
5-3. Schematic Diagram ......................................................... 13
6. EXPLODED VIEWS................................................ 16
7. ELECTRICAL PARTS LIST ............................... 19
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
TAPE COUNTER
EAR
MIC
VOL
Flat mic
VOR (TCM-459V)
MIC SENS (TCM-459V)
BATT/REC
rREC
pSTOP
(PLAY
0REW/REVIEW
)FF/CUE
PAUSE c
SPEED CONTROL
DC IN 3V
• Parts Identification

– 3 –
SECTION 2
DISASSEMBLY
CABINET (REAR), CASSETTE LID
Note: Follow the disassembly procedure in the numerical order given.
• This set can be disassembled in the order shown below.
SET CABINET (REAR) MAIN BOARD BELT
CASSETTE LID MECHANISM DECK
(MT-459V-118)
8 cassette lid
5 strap
3 two claws
2 screw
4 cabinet (rear)
1 three screws
(B1.7 × 10)
7 boss
7 boss
9 cassette spring
3 claw
6 flexible board
(CN102)

– 4 –
MAIN BOARD, MECHANISM DECK (MT-459V-118)
REC lever
screw
(1.7)
S101
screw
(M1.4)
NOTE FOR INSTALLATION
• MAIN BOARD
On installation MAIN board
adjust the S101 and REC lever.
7 claw
3 screw
(1.7)
4 screw
(M1.4)
5 MAIN board
8 mechanism deck
(MT-459V-118)
6 three screws
(IB lock)
knob (pause)
2 Remove the two solders
of the head lead (HRP901).
1 Remove two solders
of motor leads (M901).
S105
Note: On installation MAIN
board adjust the S105
and knob (pause).

– 5 – – 6 –
Precaution
• Supplied voltage: 2.5 V
• Switch and control position
VOR switch (S401): OFF (459V)
PAUSE switch (S105): OFF
VOL (RV101): mechanical mid
SPEED CONTROL (RV602): mechanical center
MIC SENS switch (S201): H (459V)
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:
BELT
1 capstan belt
2 FR belt
3 counter belt
SECTION 3
MECHANICAL ADJUSTMENTS
TapeTension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belt
capstan idler
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 (2.5 V) unless otherwise noted.
Torque Measurement
Mode Torque Meter Meter Reading
FWD 22 – 48 g•cm
CQ-102C (0.31 – 0.67 oz•inch)
Forward Back 1.0 – 4.5 g•cm
Tension (0.014 – 0.063 oz•inch)
FF, REW CQ-201B more than 50 g•cm
(more than 0.69 oz•inch)
Mode Tension Meter Meter Reading
FWD CQ-403C more than 50 g
(more than 1.76 oz)
SECTION 4
ELECTRICAL ADJUSTMENTS
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] (Side B)
Type Signal Used for
P-4-A063 6.3 kHz, –10 dB head azimuth adjustment
WS-48A 3 kHz, 0 dB tape speed adjustment
level meter
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
+
–
adjustment screw
IC101
S102
RV601
RV602
IC501

Ver 1.2

Ver 1.2

Ver 1.2

– 15 – – 16 –
• IC Block Diagrams
IC101 LA4168ML-TE-L
IC501 MM1251BFBE
SECTION 6
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
3
23
23 23
21
4
5
22
21 20
19
18
17 16
114
13
15
23
SP901
24
(including MIC101)
9
7
6
11
10
812
23
1
1 3-318-382-31 SCREW (1.7), TAPPING
2 3-345-648-51 SCREW (M1.4), TOOTHED LOCK
*3 A-3021-022-A MAIN BOARD, COMPLETE (TCM-459V)
*3 A-3021-024-A MAIN BOARD, COMPLETE (TCM-36)
4 3-008-612-01 TERMINAL, PLUS
5 3-924-750-01 TERMINAL, MINUS
6 3-924-744-01 SPRING (CLAW DETECTION), TENSION
7 3-018-311-01 CLAW, ERASING PREVENTION
8 3-018-310-01 KNOB (PAUSE)
9 4-969-980-21 SCREW (IB LOCK)
10 3-578-101-41 PLATE, ORNAMENTAL
11 3-018-307-01 CABINET (FRONT) (TCM-459V)
11 3-018-307-31 CABINET (FRONT) (TCM-36)
*12 1-669-038-11 LED BOARD
13 3-936-424-01 SPRING, CASSETTE
14 4-017-441-01 CUSHION (B)
*15 3-924-757-01 BRACKET (SPEAKER)
16 3-924-761-01 STRAP
17 3-018-309-01 LID, BATTERY CASE
18 3-018-308-11 CABINET (REAR) (TCM-459V)
18 3-018-308-31 CABINET (REAR) (TCM-36)
19 3-018-312-01 FOOT (A)
20 3-334-565-11 SCREW (B1.7X10), TAPPING
21 3-023-856-01 FOOT (B)
22 3-907-531-01 SCREW
23 3-831-441-XX SPACER, KNOB
24 X-3375-895-1 LID SUB ASSY, CASSETTE (TCM-459V)
(including MIC101)
24 X-3375-897-1 LID SUB ASSY, CASSETTE (TCM-36)
(including MIC701)
SP901 1-505-838-11 SPEAKER (3.6CM)

– 17 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
(2) MECHANISM DECK SECTION-1
(MT-459V-118)
51 X-3370-386-1 PINCH ROLLER ASSY
52 3-925-146-01 BUTTON (FF) ())
53 3-925-147-01 BUTTON (REW) (0)
54 3-925-148-01 BUTTON (PLAY) (()
55 3-925-145-11 BUTTON (REC) (r)
56 3-936-409-01 BUTTON (STOP) (p)
57 1-548-582-11 COUNTER, TAPE (SMALL TYPE)
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
75 3-018-522-01 COUNTER, BRACKET
76 3-924-675-01 PULLEY (COUNTER)
77 3-924-683-01 BELT (COUNTER)
78 3-376-407-01 SCREW (M1.4)
HRP901 1-500-073-11 HEAD, MAGNETIC (RECORD/PLAYBACK)
M901 1-698-588-11 MOTOR, DC (CAPSTAN/REEL)
63
62
61
60
59
58
74
64 65
66
67
69
68
M901
70
71
72
73
76
77
52
53
54
55
56
51
HRP901
75
78
57