Sony tcm 900dv ver 1 0

Page 1

-900DV

SERVICE MANUAL

Ver 1.0 2001.02

US Model
Canadian Model
AEP Model
Tourist Model

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type MT-900-175

SPECIFICATIONS

Recording system
2-track 1 channel monaural
Tape speed
4.8 cm/s or 2.4 cm/s
Frequency range
150 - 6 300 Hz using nomal (TYPEI) cassette
(with REC TIME switc hat NORMAL")
Speaker
Approx. 3.6 cm (1 7/16 in.) dia.
Power output
250 mW (at 10 % harmonicdistortion)

Input
Microphone input jack (minijack)
sensitivity 0.12 mV for 3 kiloth or lower impedance
microphone

Output

Earphone jack (minijack) for 8 ~3OO ohms earphone
Variable range of the tape speed

From approx. +100% to -50% (with

REC TIME switch at NORMAL)

From approx. +100% to -30% (with

REC TIME switch at DOUBLE)

9-873-082-11 Sony Corporation
2001B0200-1 Audio Entertainment Group
©2001.2 General Engineering Dept.

Variable range of pitch control variation
Approx. +1 octave to -1 octave
Power requirements
3 V DC batteries R6 (AA) x 2
External DC 3 V power sources
Dimensions (w/h/d) (incl. projecting
parts and controls)
Approx. 867 x 112.8 x 35.7 mm
(3 1/2 X41/2 X 1 7/16 in.)
Mass
Approx. 200g (7.1 oz.)
Supplied accessories
Headphones with remote control (1)
R6 (size AA) batteries (2)
(Sony World Model" only)
Carrying pouch (1)

Design and specifications are subject
to change without notice.

CASSETTE-CORDER
ONY®

Page 2

TCM-QOODV

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 componentl

- Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

TABLE OF CONTENTS
Specifications .1 1
1. GENERAL
Location of Parts and Controls llllllllllllllllllllllllllllllllllllllllll 2
2. DISASSEMBLY

2-1i Cabinet (Rear), Cassette Lid ASSY
2-2i Main Board ..................................
2-3i Mechanism Deck llllllllllllllllllllllllllllllllllllllllllllllllllllllll 4
2-4 Belt (AR), M601 (Capstan/reel motor),

HRPE901 (REC/PB/ERASE head) M
2-5 SW Board lllllllllllllllllllllllllllllllllllllll

ADJUSTMENTS
3-1i Mechanical Adjustments
3-2i Electrical Adjustments

DIAGRAMS
4-11 Block Diagrams -Main Section (1/2) -
4-21 Block Diagrams -Main Section (2/2) -
4-31 Schematic Diagram » Main Section (1/3) -
4-41 Schematic Diagram » Main Section (2/3) -
4-51 Schematic Diagram » Main Section (3/3) -
4-6iPrinted Wiring Boards -Main Section (side A)»
4-7iPrinted Wiring Boards -Main Section (side B)»
4-8iPrinted Wiring Boards -SW Section (side A)-
4-9iPrinted Wiring Boards -SW Section (side B)»
4-10.Schematic Diagram » SW Section -
4-1 1 Explanation of IC Terminals lllllll

EXPLODED VIEWS

S-li Main Board, Cabinet (Rear) section
S-Zi Cassette Lid Section
5-3i Mechanism deck Section -1(MT-900-175) 1
5-4 Mechanism deck Section -2 (MT»900-175) iiiiiiiiiiiiii 25

ELECTRICAL PARTS LIST ..

SECTION 1
GENERAL

Location of parts and controls

EAR
MIC

MIC SENS
VOR

Flat mic
REC indicator '
. - SPEED CONTROL
0 REC "

I STOP - COUNTER RESET
REW/REVIEW - i

4 DIR > - ' ' - DPC

II PAUSE REC TIME

This section is extracted from
instruction manual.

REPEAT @ SPEAKER
\/ 1c REPEAT CUE
H LD -
0 1c REPEAT REVIEW
VOL