Jvc TDW 10 Service Manual

Page 1

TD«W1OA a c E 6.!

A/B/C/E/
MODEL TD-W10 G/J/U

Contents

For Servlce Manuals
MAURITRON SERVICES

8 Cherry The

Road, Chlnnor

Oxfordshire, OX9 dQY.
Tel (01344) 351694
_ Fax (01844) 352554
emaxlr sales@maurirron.co.uk

Page Page
Safety Precautions ......................... 2 Main P.C. Board Parts and Parts List ............. 12
Specifications ........................... 3 Winng Connection .................... 15
Location of Main Parts ...................... 3 Exploded View of Mechanism Assy ............. 16
Names of Parts and Their Functions ............. 4 Exploded View of Encfusore Ass'y .............. I7
Removal of Main Parts ...................... 5 Dlmensxon ............................. 22
Main Adjusunent .......................... 7 Packing Parts L15: ......................... 23
Block Diagram ......................... 10 Accessories ,,,,,,,,,,,,,,,,,,,,,,,, Back Cover
Standard Schematic Diagram of TD-W1 O ......... 11

No. 4255

July 1985

Page 2

TD-WIOA/B/C/E/G/J/U

Safety precaution

1. The design of this product contains special hardware. 5. Leakage current check

Many circuits and components specially for safety
purposes.

For continued protection, no changes should be made to
the original design unless authorized in Writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Service should be per-
formed by qualified personnel only.

. Alterations of the design or circuitry of the product
should not be made. Any design alterations or additions
will void the manufacturers warranty and will further
relieve the manufacturer of responsibility for personal
injury or property damage resulting therefrom.

. Many electrical and mechanical parts in the product
have special safety-related characteristics. These charac-
teristics are often not evident from visual inspection
nor can the protection afforded by then necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified by (A) on the
schematics and parts list in Service manual. The use of
a substitutue replacement which does not have the same
safety characterisitics as the recommended replacement
part shown in the parts list in Service manual may
create shock, fire, or other hazards.

. The leads in the products are routed and dressed with
ties, clamps, tubings barriers and/or the like to be
separated from live parts, high temperature part, mov-
ing parts and/or sharp edges for the prevention of elec-
tric shock and fire hazard.

When service is required, the original lead routing and
dress should be observed, and they should be confirmed
to be returned to normal, after reassembling.

2 (No. 4255)

(Safety for electrical shock hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the Pro
ducts (antenna terminals, knobs, metal cabinet, screw
heads, earphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical
shock.
Do not use a line isolation transformer during this check.
0 Plug the AC line card directly into the AC outlet. Us-
ing a "Leakage Current Tester", measure the leakage
current from each exposed metal part of the cabinet,
particularly any exposed metal part having a return
path to the chassis, to a known good earth ground
(water pipe, etc,). Any leakage current must not ex
ceed 0.5 mA AC (r.m.s.).
o Alternate check method.
Plug the AC line cord directly into the AC outlet. Use
an AC voltmeter having 1,000 ohms per volt or mroe
sesitivity in the following manner. Connect a 1500 $2
IO W resistor paralleled by a 0.15 uF AC«type capaci-
tor between an exposed metal part and a known good
earth ground (water pipe, etc.l.
Measure the AC voltage across the resistor with the
AC voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a
return path to the chassis, and measure the AC volt-
age across the resistor. Now, reverse the plug in the
AC outlet and repeat each measurement. Any voltage
measured musy not exceed 0.75 V AC (r.m.s.).
This corresponds to 0.5 mA AC (r.m.s.).

AC VOLTMETER
@ (HAVING 1000 Q/v OR

MORE SENSITIVITY)
4!) C

0.15PF AC- IYPE

W :>
ISOOn IOW macs THIS PROBE

ON EACH EXPOSED
METAL PART
GOOO EARTH GROUND

(.

Q.

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D

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W1 OA/B/C/E/G/J/U

Names of Parts and Their Functions

4 (No. 4255)

AV!!! mm

"1.qu s nso

Fig. 2

opowsn switch

@Cassette holder (deck A)

(s) REC INDICATOR

o PEAK LEVEL INDICATOR
These indicate the recording level during record-
ing and output level during playback) The LED
indication varies with the signal strength during
recording and playback.
They indicate the average recording level of the
left and right channels.

GCassette holder (deck B)

@TAPE COUNTER and RESET button

OTAPE SELECT button (deck A)
when playing back a cassette, set this button to
match the type of cassette, (See "TAPE SELECT
button and switch on page 10.)

@SYNCHRO PLAY button
Press this button when performing synchro
dubbing. (See page 11.)

(Ass:

0 Cassette operation buttons (deck A)
>(play) button:
Press to play the tape.
« (rewind) button:
Press to rewind the tape.
» (fast forward) button:
Press to fast forward the tape.
I/éktop/eject) button:
Press to stop the tape. Pressing this button
after the tape stops opens the cassette holders
(The tape auto maticallv stops when it reaches
the end.)
(9 NR SYSTEM/DUBBING switch
OTAPE SELECT switch (deck 8)
Select the switch position according to the tape
to be used during recording and playback. (See
TAPE SELECT button and switch'flon page
10)
(D INPUT LEVEL control
Q Cassette operation buttons (deck B)
O(record) button:
Press to record the tape.
ll(pause) button:
Press to temporarily stop the tape in the
record or playback mode. Press it again 0
release the pause mode and restart the tape.
The other operations of the buttons are the
same as those of deck A.

,.

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