JVC TM-1400U(CV) User manual

TM-1400U(CV)
Ш SPECIFICATIONS та И SI NET S SI GR ЊЕ SQA SRST SS RU ы ва Буз a a SE 2
Ш: SAFETY PRECAUTIONS А ДРИНИ аа а ваге S AUS IE ж.алыага љута 3
Ш OPERATING INSTRUCTIONS с сасе с а ip ey HO TOG EG wee Rh he ER ша sa a ез 4
Ш SPECIFIC SERVICE INSTRUCTIONS... ... 0... 8
B'SERVICEADJUSTMENT S а ығы OU © c Shah i Rn REO RI EN SISSE 11
M PARTS ШӘТ ai aa IE EMEN TR Vaikas ит ти и и s m RR. 19
Ш SCHEMATIC DIAGRAM(APPENDED) ......................................... 0-0
Мо.50353
COPYRIGHT © 1990 VICTOR COMPANY OF JAPAN,LTD. Jan.1990

1 MI 18UUU(UV) |
SPECIFICATIONS
Dimensions 36.5ст(У/) x 39.4cm(D) x 33.4cm(H)
Weight 15.9kg
Color system NTSC system
Power Input AC 120V,60Hz
Power consumption Max. 1.05A,Avg. 60W
Picture
Tube
14"
(measured
diagonally),90°
deflection,in-Line
gun,data
grade
tinted
CRT
tri-dot
pitch
0.499mm
Screen size 284mm(H) x 213mm(V)
Scanning frequency (H) 15.75KHz
(V) 60Hz
High voltage 24kV(at zero beam current)
Horizontal resolution More than 450 lines
VIDEO IN/OUT BNC x 2(IN/OUT),Bridged connection is possible.
(Termination switch provided)
VS-1Vp-p,75fl,negative
ACCESSORY Power cord(approx. 2.4m) X 1
Design
&
specification
subject
to
change
without
notice.
2 (No.50353)

SAFETY PRECAUTIONS
10.
The design of this product contains special hardware, many circuits
and components specially for safely purposes. For continued pro-
tection,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.
Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the manufactur-
er's warranty and will further relieve the manufacturer of responsi-
bility for personal injury or property damage resulting therefrom.
Many electrical and mechanical parts in the products 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
tated 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 fea-
tures are identified by shading on the schematics and by
(A) on the parts list in Service manual. The use б! a substi-
tute replacement which does not have the same safety characteris-
tics as the recommended replacement part shown in the parts list
of Service manual many create shock, fire, or other hazards.
Use isolation transformer when hot chassis.
The chassis and any sub-chassis contrained in some products are
connected to one side of the AC power line. An isolation transform-
er of adequale capacily should be inserted between the product
and the AC power supply point while performing any service on
some products when the HOT chassis is exposed.
Don't short between the LIVE side ground and NEUTRAL
side grounding or EARTH side ground when repairing.
Some model's power circuit is partly different in the GND. The dif-
ference of the GND is shown by the LIVE (L) side GND, the NEU-
TRAL tzr) side GND and EARTH (Q) side GND. Don't short be-
tween the LIVE side GND and NEUTRAL side GND or EARTH side
GND and never measure with a measuring apparatus (oscilloscope
etc.) the LIVE side GND and NEUTRAL side GND or EARTH side
GND at the same time.
If above note will not be kept, a fuse or any parts will be broken.
If any repair has been made to the chassis, it is recommended that
the B, setting should be checked or adjusted (See ADJUSTMENT
OF Ву POWER SUPPLY). š
The high voltage applied to the picture tube must conform with that
specified in Service manual. Excessive high voltage can cause an
increase in X-Ray emission, arcing and possible component dam-
age, therefore operation under excessive high voltage conditions
should be kept to a minimum, or should be prevented. If severe аг-
cing occurs, remove the AC power immediately and determine the
cause by visual inspection (incorrect installation, cracked or melted
high voltage harness, poor soldering, etc.). To maintain the proper
minimum level of soft X-Ray emission, components in the high volt-
age circuitry including the picture tube must be the exact replace-
ments or alternatives approvided by the manufacturer of the com-
plete product.
Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the picture
tube before attempting meter connection, by connecting a clip lead
to the ground frame and connecting the other end of the lead
through а 10КЯ 2W resistor to the anode button.
When service is required, observe the original lead dress. Extra pre-
caution should be given to assure correct lead-dress in the high
voltage circuit area. Where a short circuit has occurred, those com-
ponents that indicate evidence of overheating should be replaced.
Always use the manufacturer's replacement components.
Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an Isolation check
(1)
(2)
11.
TM-140UU(UV)
on the exposed metal parts of the cabinet (antenna terminals, vid-
eo/audio input and oulput terminals, Control knobs,metal cabinet,
screwheads, earphone jack, control shafts, etc.) to be sure the prod-
uct is safe to operate without danger of electrical shock.
Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts ex-
posed to the user, particularly any exposed metal part having a re-
turn path to the chassis should withstand a voltage of 1100V AC
(r.m.s.) for a period of one second.
(.... Withstand a voltage of 1100V AC (r.m.s.) 10 an appliance rat-
ed up to 120V, and 3000V AC (r.m.s.) to an appliance raled 200V
or more, for a period of one second.)
This method of test requires a test equipment not generally found
in the service trade.
Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.) Using 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,
elc.). Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC voltmeter hav-
ing 1,000 ohms per volt or more sensitivity in the following manner.
Connect а 1,5002 10W resistor paralleled by а 0.15pF AC-type ca-
pacitor between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage across the resis-
tor with the AC voltmeter. Move the resistor connection to each ex-
posed metal part, particularly any exposed metal part having a re-
turn path to the chassis, and measure the AC voltage across the re-
sistor. Now, reverse the plug in the AC outlet and repeat each mea-
surement, Any voltage measured must not exceed 0.35V AC
(r.m.s.). This corresponds to 0.5mA АС (r.m.s.).
AC VOLTMETER
(HAVING 10002/V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
15002 10W
GOOD EARTH GROUND
High voltage hold down circuit check.
After repair of the high voltage hold down circuit, this circuit shall
be checked to operate correctly.
See item "How to check the high voltage hold down circuit”.
Ш ONLY CANADA
This mark shows a fast operating fuse, the letters indicated
below show the rating.
q
(No.50353) 3

(ESE0S'ON) +
4
INSTRUCTIONS
JVC
TM-1400U(CV)
COLOR VIDEO MONITOR
SNOILORH.ISNI 9NI.LVH3dO

S (29209 0М)
Thank you for purchasing а JVC color video monitor, Your new monitor will provide superior quality pictures
and incorporates many useful functions.
To ensure a complete understanding of the monitor and to extend its service life, please read all instructions in
this booklet and keep it in a safe place for future reference.
• 14-Inch data-grade CRT, together with а comb filter for
pictures with a horizontal resolution of more than 450 lines.
• Video input terminal with bridged connection capability,
convenient monitoring between two video sources when
dubbing.
• Mountable in a standard EIA rack with optional rack
mount adapter RK-150E, (For mounting, refer to the In“
struction manual of the RK-150E.)
CAUTION: _ TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (ОА BACK).
NO USERSEAVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol,
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
"dangerous voltage'" within the product's
enclosure that may be of sufficient magni-
tude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
Presence of important operating and main-
tenance (servicing) instructions in the litera-
ture accompanying the appliance.
SAFETY PRECAUTIONS
Safety Precautions .......
Controls and Connectors ...
Connections ...
Specifications ..
an an
In order to prevent any fatal accidents caused by misoperation
or mishandling of the monitor,be fully aware of all the follow-
ing precautions.
WARNINGS
To prevent fire or shock hazard, do not expose this
monitor to rain or moisture.
Dangerous high voltages are present inside the unit Do
not remove the back cover of the cabinet.
When servicing the monitor, contact qualified service
personnel. Never try to service it yourself.
INFORMATION
Caution: Changes or modification not approved by JVC
could void the user's authority to operate the eguip-
ment.
NOTE: This equipment has been tested and found to
comply with the limits for a Class B digital device, pur-
suant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference in a residential installation. This
equipment generates, uses and can radiate radio fre-
quency energy and, if not installed and used in ac-
cordance with the instructions, may cause harmful
interference to radio communications, However, there
is no guarantee that interference will not occur in a
particular installation. М this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
— Reorient or relocate the receiving antenna.
— |ncrease the separation between the equipment and
receiver.
— Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
This monitor is equipped with a 3-blade grounding-type
plug to satisfy FCC rule. If you are unable to insert the
plug into the outlet, contact your electrician.
PRECAUTIONS
Use only the power source specified on the rating label
located on rear of the cabinet. ~
When not using this unit (ог а long period of time, ог when
cleaning it, be sure to disconnect the power plug from the
AC outlet.
Do not allow anything to rest on the power cord. And do
not locate this unit where people will tread on the cord.
Do not overload wall outlets or power cords as this can
result in a fire or electric shock.
Avoid using this unit under the following conditions:
— in extremely hot, cold or humid places,
一 in dusty places,
— near appliances generating strong magnetic fields,
— in places subject to direct sunlight, and
— in badly ventilated places.
Do not cover the ventilation slots while in operation as this
could obstruct the required ventilation.
When dust accumulates on the screen surface, clean with а
soft cloth.
Unplug this unit from the AC outlet and refer servicing to
qualified service personnel under the following conditions:
— When the power cord is frayedor plug is damaged.
— If liquid has been spilled into the unit.
— If the unit does not operate normally following the op-
erating instructions,
— If the unit has been dropped or the cabinet has been
damaged.
— When the unit exhibits a distinct change in perform-
ance.
Do not attempt to service this unit yourself as opening or
removing covers may expose you to dangerous voltage or
other hazards. Always refer servicing to qualified service
personnel.
When replacement parts are required, have the service per-
sonnel verify in writing that the replacement parts he uses
have the same safety characteristics as the original parts.
Use of manufacturer's specified replacement parts can pre-
vent fire, shock, or other hazards.
Upon completion of any servicing or repair to this unit,
please ask the service personnel to perform the safety check
described in the manufacturer's service literatur
When this unit reaches the end of its useful li improper
disposal could result in a picture tube implosion. Ask
qualified service personnel to dispose of this unit.
Laml\annet cial!

(55505'0№) 9
(Front Panel)
CHROMA BRIGHT CONTRAST
(Rear Panel)
oren (CEB) sn.
0 У. HOLD control
Turn the adjust the vertical synchronization of the picture.
@ Picture controls
Use to optimize the picture. The center click position of
each control is its standard setting. This standard setting
can be varied (preset) by turning the SUB control screws at
the side of the controls. Use a screwdriver to turn the SUB
controls,
• PHASE control
Turn to adjust the picture hue, Adjust with reference to
skin color.
• CHROMA control
Turn to adjust the color density of the picture to your
preference.
* BRIGHT control
Turnto adjustthe picture brightness to your preference.
* CONTRAST control
Turn to adjust the picture contrast to your preference.
© POWER switch/indicator
Pressing this switch turns the power on; the indicator
lights. Pressing this switch again turns the power off; the
indicator goes off.
Q Power input connector
Connect to an AC outlet with the provided power cord.
© INPUT connectors/Termination switch
Input connector for composite video signal and output
connector for bridge-connected signal
IN : When inputting a signal
OUT : For bridged connection
Setting the termination switch
750 : When there is only an input signal
OPEN : For bridged connection
Q SET UP switch
Do not reset this switch, It is for service personnel only.
* Be sure to disconnect the power plug from the AC outlet
before connecting to other equipment.
* Also refer to the instruction manual of the equipment to
be connected.
Videodisc player
Control console
Control
console
Video
monitor
* When using any of the OUT connectors (bridged output),
set its termination switch to "OPEN".

Туре : Color video monitor
Color system : NTSC system
CRT : 14" (measured diagonally),
90° deflection, In-line gun, data-grade
tinted CRT, dot pitch 0.499 mm
Screen size (H x V) : 284 x 213 тт
Scanning frequency : (H) 15.75 kHz
(V) 60 Hz
Horizontal resolution : More than 450 lines
Power requirement : AC 120 V, 60 Hz
Power consumption : Мах. 1,05 A, Avg. 60 W
INPUT : VIDEO-BNC x 2
. VS—1 Vp-p, 75 f1, negative
Bridged connection possible
(Termination switch provided)
Weight 115.9 kg
Accessory : Power cord (approx. 2.4 т) x 1
Dimensions (Unit: mm)
Design and specifications subject to change without notice
(AD) NOOPL-WL

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SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY
PROCEDURE
1.
Method
of
removing
the
top
cover
(1)
Remove
the
two
screws
A
in Fig.
1.
(2)
Remove
the
respectively
two
screws
®
and
©.
(3)
Ву
pulling
the
cover
a
little
bit
backward,
dismount
the
ТІ
>
ет.
|
ФА
T
ТШ
cover
as
indicated
by
ап
arrow.
1
IT
III
ІШ
III
Also remove the screw
on the opposite side.
Fig. 1
2.
Method
of
dismounting
the
rear
cover
*
Dismount
the
top
cover.
V)
Remove
ha
two
screws
Org.
El
a
7”
ШО
УУ
(2)
Pull
the
rear
cover
right
upward
until
it
stops
as
indicated
by
the
arrow,
and
dismount
the
cover.
For assembly,
(1) Since the four positions © in Fig. 2-2 are hooked, align
the hooks straight and let them move down.
B (No.50353)

3. Method of dismounting Input PCB
e
e
(1)
(2)
(3)
(4)
Dismount the top cover.
Dismount the rear cover.
Remove the three screws © in Fig. 3.
Remove the GND wire.
When the two hooks between the Main and Input PCBs
are removed, the Input PCB will be dismounted.
Dismount the connectors, etc. as required.
4. Method of dismounting Power PCB
(1)
Dismount the top cover.
Remove the wire clamp fixing the transformer on the
Power PCB and PCB holder.
Remove the four screws © in Fig. 4 and dismount the
PCB holder.
Remove the two screws ©.
After raising the Power PCB once, pull the lower part of
the PCB outward and dismount the PCB.
Dismount the connectors, etc. as required.
5. Method of checking the Main PCB
(1)
(2)
(3)
Dismount the top cover.
Dismount the rear cover.
Set the TV set sideways as shown in Fig. 5. In this
case, lay soft cloth, etc. under the set in advance to
prevent any damage to the exterior part.
Remove the four screws (D and dismount the bottom
lid.
Shift the Main PCB as required.
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Fig. 5 (Bottom surface view)
(Мо.50353) 9

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6.
Method
of
dismounting
front
panel
ass'y
*
Dismount
the
top
cover.
*
Dismount
(һе
rear
cover.
(1)
Remove
the
chord
of
degauss
coil
(Power
PCB
[I]).
(2)
Remove
the
two
chords
of
deflecling
coil
(Main
PCBs
[H]
and
[V)).
(8)
Remove
the
anode
cap.
+
Pay
attention
to
the
high
tension!!
Since
the
cap
will
be
electrified,
bė
sure
to
remove
the
cap
after
discharging.
(4)
After
removing
the
[CRT
EARTH]
chord,
pull
out
the
CRT
socket
PCB.
(5) When the four screws © are removed, the front panel
ass'y will be dismounted together with the CRT.’
e Since the CRT is heavy, remove the screws O) while
holding the front panel ass'y.
7. Precautions for wire clamp and binding
band
(1) The wire should be clamped exactly.
(2) Be sure not to remove the binding band for wire
treatment. Should it be removed, the wire should be
treated exactly to the initial position.
10 (Мо.50353)
Chord of degauss coil
Anode cap
Pay attention to high
tensionl!
Chord of deflecting coil
Fig. 6-1
Use the long screw driver.
The screw driver is accessible from here.
Fig. 6-2