Jvc TDW 216 BK Service Manual

Page 1

TD-W215TN
TD-W21GBK

A/BIC/EJEN/Gmwur

JVB

SERVICE MANUAL

TD-W215TN

A/ B/ C/ E/ EN/ G/J/ U/ UT

; TD-W21GBK

COMPU LINK
M WM =' "a: Cormoneni
g y @ @ H o
g 3' fl , A, E5 :51
A Mae? .3 Ei®ra E. we 5
m. .m 1K m .w .u .;.-:::.~. Area Suffix
© 9 2' 2' A «Australia
i i = a? B ~U.K
C Canada
E Continental Europe
EN ~- North Europe
G - Germany
.... UWSA
U ~--Other Areas
UT- ---------- Taiwan
Contents
I .Safety Precautions -~ Pagez 6.smndard Schematic Diagram ---------------- 23
I Features/Specifications ' -- """"""""""""" 4 7.Locatlon of P.C.Board parts
I .lnstructlons(Extract) .. .......................... 5 and Parts List ..................... 26
1.Locatlon of Main Parts ----------------------- 1o 8.Exploded View of Enclosure Component Parts
2.Removal of Mal" Parts ......................... 1 and Parts List ..................... 34
3.Maln Adjustment - ' " 16 9.Exploded View of Mechanism Component Parts
4.erlng ConnecthHS ........... v ........... . . . . . . 21 and Parts List ................ u - . . o 38
5.Block Diagram .. ---------- ~ ------------ 22 1D.Packlng Illustration and Parts List Back Cover

No. 4352
January 1994

Page 2

$gW§1ggauwclaaimmum

I Safety Precautios

LThe design this product contains special hardware and 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 performed by qualified personnel only.

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

3. Many electrical and mechanical parts in the product have special safety - related characteristics These characteristics are often
not evident from visual inspection nor can the protection afforded by them 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 shading and( A )on the schematic
diagram and by ( A ) on the parts list in the service manual. The use of a substitute replacement which does not have the same

safety characteristics as the recommended replacement part shown in the parts list of service manual may create shock. fire. or

other hazards.

4. The leads in the products are routed and dressed with ties. clamps . tubings. barriers and the like to be separated from live parts.
high temperature part5. mpving parts and or sharp edges forthe prevention of electric shock and fire hazard. When service is
required. the original lead routing and dress should be observed. and it should be confirmed that they have been returned to normal.
after reassembling.

5. Leakage current check (Electrical shock hazard testing)

After re - assembling the product. always perform an isolation check on the exposed metal parts of the product (antenna

terminals. knobs. metal cabinet. screw heads. headphone 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.

- Plug the AC line cord directly into the AC outlet. using aLeakage current tester. measure the leakage current from each exposed
metal part of the cabinet. particulary any exposed metal part having a return path to the chassis. to a known good earth ground.
Any leakage current must not exposeed 0.5mA AC(r.m.s.) m AC VOLTMETER

- Alternate check method (Having 1000 ohms/volt.

or more sensitivity.)
Plug the AC line cord directly into the AC outlet. Use an AC

,\

voltmeter havrng 1.000 ohms per volt or more sensmvrty in the 0351-: AC TYPE

following manner. Connect a 1.500 ohms 10W resistor paralleled by _._".__.

a 0.15 [.L F AC type capacitor between an exposed metal part and Place his Mb?
w on each exposed

a known good earth ground. Measure the AC voltage across the 1500 n 10 W metal part.

reststor With the AC voltmeter. Move the resrstor connection to each Good earth ground
exposed metal part, panicularly any exposed metal part having a return path to the chassis. and measure the AC voltage across
the resistor. Now. reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V

AC[r.m.s.).This corresponds to 0.5mA AC(r.m.s.).

k/

\/

Warning

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintaintaind.
3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided. check setting for local voltage.

2 (No. 4352)

Page 4

¥3nggfiammyaucwum

I Features

mean

10.
11.

. Double cassette mechanism for recording/playback

and playback

. Full logic mechanism

. Dolby* HX PRO headroom extension

. Dolby B & C noise reduction system

. DDRP (Dynamics Detection Recording Processor)

compatibility
The DDFtP function is possible only when used with a
suitable JVC CD player.

. 2-color FL peak level indicator
. Digital tape counter respectively for deck A and

deck B

. Synchro start (normal-lhigh-speed) dubbing
. Auto tape select mechanism (decks A and B)

Continuous playback with auto rewind
COMPU LINK-3 compatible

I Spesifications

Type : Double cassette deck
Track system : 4-track, 2Achannel
Tape speed : 4.8 cm/sec (1-7/8 inch/sec) (Normal)

9.5 cm/sec (3-3/4 inch/sec) (High)

Frequency response : (-20 dB recording)

Type IV tape ; 20 - 17,000 Hz

30 - 16,000 Hz(13 dB)
Type II tape; 20 - 16,000 Hz

30 - 15,000 Hz (:3 dB)
Type I tape ; 20 - 16,000 Hz

30 - 15,000 Hz (:3 dB)

S/N ratio 1 58 dB (S = 315 Hz, k3 = 3 °/o, N = A-

weighted, Type IV tape) The S/N is
improved by about 15 dB at 500 Hz
and by max. 20 dB at 1 kHz ~ 10 kHz
with Dolby C NR on and improved by
5 dB at 1 kHz and by 10 dB at above 5
kHz with DOLBY B NR on,

Improvement of

MOL :4 dB at 10 kHz with Dolby C NFl ont
Wow and flutter : 0.08% (WRMS), i0.2%(DlN/IEC)
Channel separation : 40 dB (1 kHz)

Crosstalk : 60 dB (1 kHz)

Harmonic distortion : k3; 0.8% (Type IV tape, 315Hz. O VU)

Heads :Deck A; METAPERM head for
playback x 1

4 (No. 4352)

Deck B; METAPERM head for
recording/playback x 1
2-gap ferrite head for erasure x 1

* Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang & Olufsen.
Dolby, the double-D symbol DI] and HX PRO are
trademarks of Dolby Laboratories Licensing Corporation.

ccwuuux

WW
COMPU LINK control system is the convenient system
using COMPU LlNK-3/SYNCHRO terminals on the rear
panel. (See pages 4 and 8.)

Motors : Electric governed DC motor for
capstan x 1
DC motor for reel x 1
DC motor for mechanism drive x 1
(For both decks A and B)

\/

Fast forward!
Rewind time : Approx, 110 sec. with 0-60 cassette
Input terminals
LINE IN : Input sensitivity; 80 mV (0 VU)
(x 1 circuit) Input impedance; 50 k9
Output terminals
LINE OUT 2 Output level; 300 mV (0 VU)
(x 1 circuit) Output impedance; 5 k9 )

PHONES ><1 : Output level; 0.3 mW/S Q (0 VU)
Matching impedance 8 Q ~ 1 kn
Other terminals : COMPU LINK~3ISYNCHRO x 2
Power requirement : AC 240 V. 50/60 Hz (Australia/UK.)
AC 120 V, 60 Hz (UtS.A.)
Power consumption : With power switch on 17 W
With power switch standby 4.3 W
Dimensions
(WxHxD) :435x134x328mm
(17-3/16 X 55/16 x12-15/16")
Weight : 4.9 kg (10.9 lbs.)
Accessories : Pin plug cord ..
Remote cable .

Design and specifications are subject to change without
notice.