Sony TCM-500-DV Service manual
TCM-500DV
SERVICE MANUAL
Ver 1.2 2004. 04
SPECIFICATIONS
Recording system
Tape speed
Frequency range
TIME/PLAY MODE switch at “NORMAL”)
Speaker
Power output
Input
Output
Variable range of the tape speed
MODE switch at “NORMAL”)
Power requirements
Dimensions (w/h/d) (incl. projecting parts and controls)
Mass (main unit only)
2-track 1 channel monaural
4.8 cm/s or 2.4 cm/s
350 - 6 300 Hz using nomal (TYPE I) cassette (with REC
Approx. 3.6 cm (1
450 mW + 450 mW (at 10 % harmonic distortion)
Microphone input jack (minijack)
sensitivity 0.2 mV for 3kΩ or lower impedance microphone
Earphone jack (minijack) for 8 -300Ω earphone
From approx. +30% to –15% (with REC TIME/PLAY
• 3 V DC, batteries AA (R6) x 2
• External DC 3 V power sources
Approx. 87.6 x 113.0 x 37.1 mm
1
/2 x 4 1 /2 x 1 1 /2 in.)
(3
Approx. 215 g (7.6 oz.)
7
/16 in.) dia.
US Model
Canadian Model
AEP Model
E Model
Tourist Model
Model Name Using Similar Mechanism New
Tape Transport Mechanism Type MT-500-175
9-877-111-03
2004D02-1
© 2004.04
Design and specifications are subject to change without notice.
CASSETTE-CORDER
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
TCM-500DV
E
TABLE OF CONTENTS
1. GENERAL ................................................................... 2
2. SERVICING NOTES ................................................ 2
3. DISASSEMBLY ......................................................... 3
3-1. Cabinet Rear Assy (500), Lid Assy (500),
Cassette .................................................................. 3
3-2. MAIN Board .......................................................... 4
3-3. Mechanism Deck ................................................... 4
3-4. Head, Magnetic (Rec/PB/Erase) (HRPE901),
Belt (AR), Capstan/Reel (M601) .......................... 5
3-5. LED Board ............................................................. 5
3-6. SP Board ................................................................ 6
4. MECHANICAL ADJUSTMENTS ....................... 7
5. ELECTRICAL ADJUSTMENTS ......................... 7
6. DIAGRAMS
6-1. Block Diagrams ...................................................... 8
6-2. Printed Wiring Board –MAIN Board (Side A) –... 9
6-3. Printed Wiring Board –MAIN Board (Side B) –... 10
6-4. Schematic Diagram –MAIN Board (1/2) – ........... 11
6-5. Schematic Diagram –MAIN Board (2/2) – ........... 12
6-6. Printed Wiring Board –LED, SP Board – .............. 13
6-7. IC BLOCK DIAGRAMS ....................................... 14
7. EXPLODED VIEWS ................................................ 15
7-1. Cabinet Section ...................................................... 15
7-2. Cassette Holder Section ........................................ 16
7-3. Mechanism Deck Section-1 (MT-500-175) .......... 17
7-4. Mechanism Deck Section-2 (MT-500-175) .......... 18
8. ELECTRICAL PARTS LIST ............................... 19
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 damaged by heat.
MIC (PLUG IN POWER)
VOL
z
REC
x
STOP
nN
PLAY
REW/REVIEW
FF/CUE
n
DIR
N
.
PAUSE
SECTION 1
GENERAL
EAR
TAPE COUNTER
Flat Mic
Microphone affleurant
REC TIME/PLAY MOD
VOR
REC, BATT, E lamps
Témoins REC, BATT,
E
This section is extracted from
instruction manual.
SPEED CONTROL
SECTION 2
SERVICING NOTES
In this set, the S102 (POWER) detects REC/PLAYBACK on.
It is mounted on the MAIN board, and therefore the REC/PLAYBACK on cannot be detected with the MAIN board removed.
When making an operation check and voltage check of mechnical deck with the MAIN board removed, fix the S102 at turn on.
Also, soldering the lands SL101 bridge makes S102 to turn on.
–MAIN BOARD (side A) – –MAIN BOARD (side B) –
*
ON
S102
2
SL101
• This set can be disassembled in the order shown below.
qa
5
qg
Lid assy (500), cassette
6
Flexible doard (CN201)
Cabinet (front) assy (500)
2
Screws (B1.7 x 9)
3
Screws (1.7 x 16)
4
Claws
8
Strap, hand
1
Foot (B)
7
Cabinet rear assy (500)
0
Screw (B1.7 x 3)
9
Flexible board (CN401)
Returning lever
Note on Assembling "Lid Assy (500),
Cassette"
On assembling the lid assy (500),
cassette, insert the one side of the l
id spring to the hole on the lid assy,
and fit the other side to the cabinet
(front) assy (500) as shown in the
figure.
qs
Remove the "lid assy (500),
cassette" while pushing the
pivot with a phillips-head
screwdriver or the like.
qd
Remove the returning lever from the
pivot of the "lid assy (500), cassette"
while inserting a screwdriver between
the "lid assy (500), cassette" and the
returning lever.
qf
Remove the "lid assy (500), cassette"
while pushing the pivot with a phillips head screwdriver or the like.
TCM-500DV
SECTION 3
DISASSEMBLY
Cabinet (Front) assy (500) MAIN board
Set
Note: Follow the disassembly procedure in the numerical order given.
Lid assy (500), Casette
Cabinet Rear assy (500)
LED board
SP board
Mechanism Deck
Head, Magnetic (Rec/Pb/Erase) (HRPE901), Belt (AR),
Capstan/Reel Motor (M601)
3-1.CABINET REAR ASSY (500), "LID ASSY (500), CASSETTE"
3
TCM-500DV
)
r
3-2. MAIN BOARD
2
Flexible board (CN101)
5
MAIN board
Cabinet (front) assy (500)
4
White
1
Remove four solders of capstan/reel moto
Orange
Black
Red
3-3. MECHANISM DECK
6
3
Screws (M1.4)
5
Screws (M1.4 x 2.5)
7
Cabinet (front) assy (500)
Mechanism deck (MT-500-175
3
4
Jack (600)
1
Belt (counter)
2
Screw (M1.4 x 2.5)
4
TCM-500DV
3-4.HEAD, MAGNETIC (REC/PB/ERASE) (HRPE901), BELT (AR), CAPSTAN/REEL MOTOR (M601)
How to attach a belt
3 Belt (AR)
4 Screw (M1.4)
3-5.LED BOARD
1 Screw (M1.4)
8
Mic 901
5 Capstan/reel motor (M601)
2 Head, magnetic (rec/pb/erase) (HRPE901)
Lid assy (500) cassette
5
Spring (earth)
7
Sprng (500), ground
1
Screws
6
Remove two solders of mic
3
4
Flexible board (CN402)
9
LED board
2
Screws
5
TCM-500DV
3-6. SP BOARD
1
Remove a claw of knob
(speed) (600) by a screwdriver
9
SP board
5
Claws
6
4
Screw
7
Flexible board (CN202)
8
Remove four solders of speaker leads
2
Claw
3
Knob (speed) (600)
Cabinet rear assy (500)
6
SECTION 4
t
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
TCM-500DV
Ver 1.2
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback/erase head pinch roller
capstan rubber belt
2. Demagnetize the record/playback/erase head with a head demag
netizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power supply
voltage (3 V) unless otherwise noted.
Torque Measurement
Mode Torque Meter Meter Reading
FWD (20 – 40 g•cm)
CQ-102C
FWD
Back Tension
REV (0.5– 5 g•cm)
REV (0.007 – 0.069 oz•inch)
Back Tension
FF, REW CQ-201B
1.97 – 3.92mN•m
(0.28 – 0.55 oz•inch)
0.05 – 0.49 mN•m
more than 4.91 mN•m
(more than 50 g•cm)
(more than 0.69 oz•inch)
Tape Tension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 50 g
(more than 1.76 oz)
Setting:
• Supplied voltage: 3 V (DC)
• Switch and control position
VOL contorl (RV101) : mechanical center
REC SPEED switch (S401) : normal (4.8cm/s)
PAUSE switch (S601) : OFF
SPEED CONTROL (RV201) : center click
VOR switch (S402) : OFF
Regulation Level
input level Mic –60dBs
output level earphone 16Ω, –20dBs
Test T ape
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
0 dB=0.775 V
Tape Speed Adjustment
Mode: playback
test tape
WS-48A
(3 kHz, 0 dB)
16 Ω
set
EAR jack (J102)
frequency
counter
+
–
Procedure:
1. Set [REC TIME] switch (S401) to NORMAL (4.8 cm/s) posi tion, and playback the tape (WS-48A) .
2. Adjust RV602 so that frequency counter reading becomes 3,010
Hz.
3. Set [REC TIME] switch (S401) to DOUBLE (2.4 cm/s) posi tion.
4.Playback the tape from the beginning for two minutes, then ad just R V601 so that frequency counter reading becomes 1,505 Hz.
Confirm that deflection of the frequency counter reading between
the beginning and the end of tape is within 2% (NORMAL: approx.
60 Hz, DOUBLE: approx. 30 Hz) .
Adjustment Location:
– MAIN BOARD (Conductor Side) –
RV601
Tape Speed Adjustment
(Double Speed)
11
20
IC601
10
1
RV602
Tape Speed Adjustmen
(Normal Speed)
77
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