Jvc TDV 562 BK Service Manual

Page 1

TD - V5628K A/B/E/EN/G/U/UT
TO A V561TN C/J

JVD

SERVICE MANUAL

TD-V5623K A/B/E/EN/G/U/UT
TD-V561TN C/J

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Area Suffix
, Australia

North Europe

~~~~~~~~~ Germany
.......... U.S,A.
-- Other Areas
--------- Taiwan
Co ntents
I Safety Precautions ......................... Pagez [6].Standerd Schematic Diagram ................. 25
I Features/Specifications ---------------------- 4 I.Location of P.C.Board parts
I Instructions(Extractlon) ......................... 5 and Parts List ..................... 28
E].Locatlon of Maln Parts --------------------- 12 I.Exploded View of Enclosure Component Parts
@.Removal of Main Parts .......................... 13 and Parts Llst ..................... 36
.Maln Adjustment """"""""""""""""""" 18 I.Exploded View of Mechanlsm Component Parts
Emeng Connections ............. . .............. 23 and Parts List ..................... 33
E].Block Diagram ------------------------------- 24 @Packlng lllusratlon and Parts List ------------- 41
No.4347

March 1993

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TD - VSGZBK A/B/E/EN/G/U/UT
TD , V561TN C/J

I Safety Precautios

l. The 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 manufacturert 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 manufacture's warranty and will further relieve the manufacture of responsibility for
personal injury 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 parts. moving parts and or sharp edges for the 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 ol 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.)

E AC VOLTMETER
- Alternate check method (Having 1000 ohms/volt.
or more sensitivity.)

Plug the AC line card directly into the AC outlet. Use an AC 0 n

-J
0.15 uF AC TYPE
following mannert Connect a 1.500 ohms 10W resistor paralleled by .

r

voltmeter having 1.000 ohms per volt or more sensitivity in the

a 0.15 ,u F AC type capacitor between an exposed metal part and Place this probe
on each exposed
a known good earth ground. Measure the AC voltage across the 1500 n 10w metal part.

resistor With the AC voltmeter. Move the resistor connection to each G o o d earth ground

exposed metal part. particularly 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.mts.)tThis corresponds to 0.5mA AC(r.m.s.).

9 Warning

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

2. it is the legal responsibility of the repairer to ensure that these safety standards are maintaintained,
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.4347)

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TD ~ VSSZBK A/B/E/EN/G/U/UT
TD - V561 TN ON

I P.C.board assy inside of front panel

OFL Board assy(see Fig. 2-5)

1. Remove the seven screws @retaining the FL board assy.
2. Remove the FL board assy .

3. Remove the opelation button assy.

OVolume/key switch board and H.phone board
assy (seeFig.2-5)

1. Remove seven screws retaining the volume/key switch
board assy.

2. Remove the volume/key switch board assy.

3. Remove two screws ©retaining the H.phone board ass'y.

0 Door arm shalt

Volume [key switch board

P.Head phne hoard Fig. 2 - 5

0 Main P.C.Board assy (see Fig. 2-1,Fig.2-2)

1. Remove the one screw @retaining the pin-jacks.

2. Remove the screw ®retaining the DOS jack.

3. Remove two screws @retaining the heat sink.

4. remove the six screws ®retaining the amplifire board assy

5. Pull the main P.C.board assembly slightly forward and
bring it up from the back.

I Cassette holder assy (see Fig. 2-5,Fig.2-6)

1. Remove the two screws®retaining the mechanism ass'y.
2. Remove the one screw (13) retaining the damper holder.

3. Remove the cassette holder arm from the front panel assy.

Fig.2-6

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TD - V561 TN C/J

Adjustment and
Check Items Method Standard

Flywheel and thrust Check by feel. 0.2~0.5 mm
check
Pinch roller contact The right side pinch roller must contact the
timing check capstan shaft before the left side pinch roller.
Pinch roller guide height Use M300 gauge to adjust ® so that the 3.8 Pinch roller
adjustment mm gauge passes. 2:}33232:
Playback head height Use the M300 gauge and adjust screw so Head guide (a)
and tilt adjustment that the 3.8 mm gauge passes the playback height adjustment

head tape guide.

Playback azimuth
adjustment

Playback the VTT704 tape and use screw © to
adjust the output maximum and phase.

Tape travel check

Use a C-90 padded tape and check for tape curl
at the head when the tape starts winding.

Use mirror tape to check
the tape travel.

Head mounting position

Use the M300 gauge to check that the play-
back head protrudes slightly beyond the
recording head.

The other ratings are as follows.
Dimensions are in relation to guide post @.

CPD
\ ,
. During a= 3.1~4.0
GU'de P05! 3 Playback 3.1-4.2
C
9.
b T During 3:44-51:11".
l MS b=0.05-0.35
d=0.2~0.3 mm
E Head 0:0:

R Head P a Head
d

Adjust the bend in the head base as shown be-
low so that a moves inward 4.4~5.1 during

MS.
0U
Adjust .1 -

Here

Excessive: bend upward
insufficient: bend downward

0.05~
0.35 mm

(No.4347) 19

TD v VSSZBK A/B/E/EN/G/U/U