WM-EX190/EX192
US Model
Canadian Model
WM-EX190
AEP Model
E Model
Chinese Model
WM-EX190/192
SERVICE MANUAL
CASSETTE PLAYER
MICROFILM
SPECIFICATIONS
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
MT-WMEX192-114
· Power requirements
3V DC batteries R6 (AA)
× 2
· Dimensions
82
× 111.5 × 34.5 mm
(w / h/ d) incl. projecting parts and controls
· Mass
Approx. 115 g / Approx. 190 g incl.
batteries and a cassette
· Supplied accessories
Stereo headphones or Stereo earphones (1) / Belt clip (1)
Design and specifications are subject to change without notice.
Photo : WM-EX192
Ver 1.0 2000. 01
-- 2 --
TABLE OF CONTENTS
Flexible Circuit Board Repairing
·
Keep the temperature of the soldering iron aroud 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.
SECTION 1
GENERAL
1.
GENERAL ······································································ 2
2.
DISASSEMBLY
2-1.
Cabinet (REAR) ································································· 3
2-2.
Main Board ········································································· 4
2-3.
Lid, Cassette ······································································· 4
2-4.
Mechanism Deck ································································ 5
2-5.
"BELT" "MOTOR" "PINCH LEVER" "HEAD,
MAGNETIC" ····································································· 5
3.
MECHANICAL ADJUSTMENT ······························ 6
4.
ELECTRICAL ADJUSTMENT ································ 6
5.
DIAGRAMS
5-1.
Block Diagram ··································································· 7
5-2.
Printed Wiring Board ·························································· 9
5-3.
Schematic Diagram ·························································· 11
5-4.
IC Block Diagram ···························································· 13
6.
EXPLODED VIEWS
6-1.
Cabinet Section ································································· 14
6-2.
Main Board Section ·························································· 15
6-3.
Mechanism Section-1 ······················································· 16
6-4.
Mechanism Section-2 ······················································· 17
7.
ELECTRICAL PARTS LIST ··································· 18
This section is extracted
from instruction manual.
-- 3 --
SECTION 2
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
2-1. CABINET (REAR)
· This set can be disassembled in the order shown below.
Cabinet (rear)
Set
Main board
Lid assy, cassette
Mechanism deck
Belt
Motor
Pinch lever (N) assy
Head, magnetic
A
1 Two screws (B1.7
× 9)
2 Open the lid, cassette
3 Cabinet (rear)
(There 16 claws of
A to P are caught.)
B
K
M
L
C
N
O
P
D
E
F
G
H
I
J
-- 4 --
2-2. MAIN BOARD
2-3. LID ASSY, CASSETTE
1 Remove the solders.
2 Screw (M1.4)
Claw
3 MAIN board
(There is a claw.)
2 Spring (torsion)
5 Lid assy, cassette
1 Open the lid, cassette
3 Release the catch
4 Release
the catch
-- 5 --
2-4. MECHANISM DECK
2-5. BELT, MOTOR, PINCH LEVER (N) ASSY, "HEAD, MAGNETIC"
1 Remove the mechanism deck
in the direction of the arrow.
(There two claws.)
Two claws
2 Two screws (M1.4)
5 Two screws (M1.4)
3 Motor (reel/capstan)
6 Head,magnetic (playback)
4 Pnch lever (N) assy
1 Belt
Motor (reel/capstan)
Wheel assy (sp), capstan
Belt threading
Belt