JVC TM-H140PN Service Manual

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JVC

1 SERVICE MANUAL

COLOUR VIDEO MONITOR

TM-H140PN

BASIC CHASSIS

c:.-

TM-H140PN

CONTENTS

■

SPECIFICATIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2

* OPERATING INSTRUCTIONS (APPENDIX) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1-1

■

SAFETY PRECAUTIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3

■

SPECIFIC SERVICE INSTRUCTIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4

■

SERVICE ADJUSTMENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 9

* STANDARD CIRCUIT DIAGRAM (APPENDIX) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2-1

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PARTS LIST· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 37

No.51766

Nov.2000

TM-H140PN

SPECIFICATIONS

Item Content

Colour system Picture tube

Effective screen size Scanning frequency

Horizontal resolution Colour Temperature

~i9~ Voltage Sig nal ___ i_np_ut_J __ o_u_tput

VIDEO INPUT A

VIDEO INPUT B

Input Terminals

Y/C SEPARATE

AUDIO INPUT A

PAL/ NTSC 3.58 36cm measured diagonally, 90° deflection,

in-line gun, trio - dot type (phosphor dot - trio pitch of 0.28 mm)

280.8mm x 210.6mm (W x H) / 335.4mm (Diagonal) (H)15.734 kHz (NTSC)

15.625 kHz (PAL)

(V)59.94 Hz (NTSC)

50Hz (PAL)

750TV line or more (Y/C input mode) 6500K; x = 0.313, y = 0.329

9300K ; x = 0.283, y = 0.297

23.7kV-26.3kV

BNC terminal : 1 bridge-connected output with automatic termination 1V(p-p) 75 Q (negative sync)

BNC terminal : 1 bridge-connected output with automatic termination 1V(p-p) 75Q (negative sync)

Mini-DIN(4pin): 1 bridge-connected output with automatic termination

C (Burst) : 0.286V(p-p) 75 Q (NTSC Burst)

500mV(rms) (monaural), high-impedance, bridge connection posible

: 1.0V(p-p) 75 Q (negative sync)

: 0.3V(p-p) 75 Q (PAL Burst)

AUDIO INPUT B

Audio power output Speaker Power requirements Power consumption Operation temperature Operation humidity Dimension (W x H x D) Mass

Design & specifications are subject to change without notice.

500mV(rms) (monaural), high-impedance, bridge connection posible 1W (Monaural)

8cm round x 1 230V AC, 50/60 Hz

0.5A (230V, AC) 0-40 °C (32-104° F) 20-80% (non-condensing) 346mm x 310mm x 375mm

13.4kg

No.51766

OPERATING INSTRUCTIONS

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TM-H140PN

TM-H140PN COLOUR VIDEO MONITOR

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Nov.2000 No.51766

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Thank you for purchasing this JVC colour video monitor. Before using it, read and follow all instructions carefully to take full advantage of the monitor 's capabilities.

SAFETY PRECAUTIONS

In order to prevent any fatal accidents caused by misoperation or mishandling the monitor , be fully aware of all the following 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 cab inet. When servicing the monitor, contrast qualified service person nel. Never try to service it yourself.

WARNING: THIS APPARATUS MUST

BE EARTHED.

PRECAUTIONS

• Use only the power source specified on the unit.

• When not using this unit for a long period of time, or 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 place 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,

- in dusty places,

- near appliances generating strong magnetic fields,

- in places subject to direct sunlight,

- in badly ventilated places,

- in automobiles with doors closed.

• Do not cove r the ventilation slots while in operat ion as this could obstruct the required ventilation flow.

• When dust accumulates on the screen surface , clean it with a soft cloth.

Machine Noise Information Ordinance 3. GSGV, January 18, 1991: The sound pressure level at the operator position is equal or less than 70 dB(A) according to ISO 7779.

Improper operations, in particular alternation of high

voltage or changing the type of tube may result in x-ray

emission of conside rable dose. A unit altered in such a

way no longer meets the standards of certification , and

must therefore no longer be operated .

• Unplug this unit from the AC outlet and refer servicing to qualified service personnel under the follow ing conditions:

- when the power cord is frayed or the plug is damaged,

- if liquid has been spilled into the unit,

- if the unit has been dropped or the cabinet has been damaged,

- when the unit exhibits a distinct change in performance.

• Do not attempt to service this unit yourse lf 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 personnel verify in writing that the replacement parts he/ she uses have the same safety characteristics as the original parts. Use of manufacture's specified replacement parts can prevent fire, shock, or other hazards.

• Upon completion of any servicing or repair work to this unit, please ask the service personnel to perform the safety check described in the manufacturer's service literature.

• When this unit reaches the end of its useful life, improper disposal could result in a pictu re tube implosion. Ask qualified service personnel to dispose of this unit.

POWER CONNECTION (Only for United Kingdom-type power cord)

The plug on the United Kingdom-type power cord has a built-in fuse.

WARNING

Do not cut off the main plug from th is equ ipment .

If the plug fitted is not suitable for the power points in your home or the cable is too short to reach a power point , then obtain an appropriate safety approved extension lead or adapter or consult your dealer.

If nonetheless the mains plug is cut off, remove the fuse and

dispose of the plug immediately, to avoid a possible shock hazard by inadvertent connection to the main supply.

If a new main plug has to be fitted, then follow the instruction given below:

WARNING :

THIS APPARATUS MUST BE EARTHED.

IMPORTANT .

The wires in the mains lead on this product are coloured in accordance with the following cord:

Green-and-yellow : Earth Blue : Neutral Brown : Live

As these colours may not correspond with the coloured making identifying the terminals in your plug, proceed as follows:

The wire which is coloured green-and-yellow must be connected to the terminal which is marked with the letter E or the safety earth symbol @ or coloured green or green-and-yellow.

The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black.

The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.

When replacing the fuse , be sure to use only a correct ly rated approved type, re-fit the fuse cover.

IF IN DOUBT - CONSULT A COMPETENT ELECTRI -

How To Replace The Fuse

Open the fuse compartment with the blade screwdriver, and replace the fuse.

(* An example is shown in the illustration below.)

CIAN.

CONTENTS

SAFETY PRECAUTIONS .................. ............................. .................................. 2

CONTROLS AND FEATURES ..................................................................... .... 4

HOW TO HANDLE BASIC OPERATIONS ....................................................... 7

HOW TO USE THE MENU FUNCTIONS ....................................... ................... 8

HOW TO INITIALISE THE SETTING .................... ........................................... 11

SCREEN BURN

• It is not recommended to keep a certain still image displayed on screen for a long time as well as displaying extremely bright images on screen. This may cause a burning (sticking) phenomenon on the screen of cathode-ray tube. This problem does not occur as far as displaying normal video playback motion images.

BASIC CONNECTION EXAMPLE ................ .................. ................................ 12

TROUBLESHOOTING ................................. ...................... ............................. 14

SPECIFICATIONS ........................... ................. ........................... ................... 15

CONTROLS AND FEATURES

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FRONT VIEW-------------

[Il Phase button [PHASE r::lli ]

Press this button to set the picture hue adjustment mode. Adjust the value with the VOLUME/SELECT buttons. Also used as a control button in the menu function mode .

Chroma button [CHROMA ~ ]

Press this button to set the picture colour density adjustment mode. Adjust the value with the VOLUME/ SELECT buttons. Also used as a control button in the menu function mode.

[!] Brightness button [BRIGHT

Press this button to adjust picture brightness. Adjust the value with the VOLUME/SELECT buttons. Also used as a control button in the menu function mode.

[!J Contrast button [CONTRAST () ]

Press this button to adjust picture contrast. Adjust the value with the VOLUME/SELECT buttons. Also used as a control button in the menu function mode.

[ID Menu button [MENU]

Displays and disappears the <MENU> screen. Pressing the PHASE button with the Menu button depressed will display the <SET-UP MENU> screen.

[!] Volume/Select buttons

[VOLUME/SELECT - ..cc::::J +]

Adjusts the speaker volume. Also used as a control button in the menu function mode.

[zJ Under Scan button [UNDER SCAN]

Reduces the screen size to display the whole screen. Press the button again to quit Under Scan.

◊

]

[ID Input B (VIDEO /Y/C) button

[INPUT SELECT B]

Selects the video signal input to the VIDEO B termina l and the audio signal input to the AUDIO B terminal on the rear panel. When selected, the input B (VIDEO /Y/C) indicator [ill lights.

• The VIDEO B terminals include a video termi nal (BNC connector) and a V/C terminal (mini-DIN 4-pin connector). The V/C (S-video) terminal is given priority.

[]J Input A (VIDEO) button [INPUT SELECT A]

Selects the video signal input to the VIDEO A terminal and the audio signal input to the AUDIO A terminal on the rear panel. When selected, the input A (VIDEO) indicator [ill lights.

[IQ] Power indicator

Lights in green when the power is ON.

Lit : When the power is on. Unlit : When the power is off.

[TI] Power switch [POWER CD]

Press this switch to turn the power on or off.

- ON : Power is turned on.

.a OFF: Power is turned off.

lg] UNDER SCAN indicator

Lights in green when UNDER SCAN is selected .

Input B {VIDEO /V/C ) indicator

Lights in green when Input B (VIDEO /V/C) is selected.

IH] Input A {VIDEO) indicator

Lights in green when Input A (VIDEO) is selected.

~ Speaker

A built-in speaker is located inside the right side panel when the monitor is viewed from the front.

REAR VIEW---------------

ToACoutlet ~ -

(230 V AC, + \fC_'>; ___ • EL European-type

50 Hz/60 Hz) 2"1

Video A terminals [VIDEO A IN/OUT]

Video signal input (IN) and output (OUT) terminals . The output terminal is bridge-connected .

IN : Video signal input terminal OUT : Bridge-connected video signal output terminal

( Notes:)

• For corresponding audio signals , use the AUDIO A

terminals [ill.

• Also refer to BASIC CONNECT ION EXAMPLE on page 12.

ITI] Video B termina ls [VIDEO B IN/OUT]

Video signal input (IN) and output (OUT) terminals. The output terminal is bridge-connected.

IN : Video signal input terminal OUT : Bridge-connected video signal output terminal

( Notes:)

• For corresponding audio signals, use the AUDIO B

terminals rm.

• When both VIDEO B terminals are connected (input) at the same time, the Y/C terminal is given priority.

• Also refer to BASIC CONNECTION EXAMPLE on page 12.

United Kingdom-ty~

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[ID Video B (Y /C) terminals

[VIDEO B Y/C IN/OUT]

V/C (S-Video) signal input (IN) and output (OUT) terminals. The output terminal is bridge-connected.

IN : VIC-separated (S-video) signal input terminal OUT : Bridge-connected VIC-separated (S-video) signal

output termina l

( Notes:)

• For corresponding audio signals, use the AUDIO B

terminals rm.

• When both VIDEO B terminals are connected (input) at the same time, the V/C terminal is given priority.

• Also refer to BASIC CONNECTION EXAMPLE on page 12.

~ Audio A terminals [AUDIO A IN/OUT]

Input (IN) and output (OUT) termina ls for the audio signal corresponding to the VIDEO A terminals [ill. The output termina l is bridge-connected.

IN : Audio signal input terminal OUT : Bridge-connected audio signal output terminal

( Notes:)

• For corre~onding video signals, use the VIDEO A terminal llij.

• Also refer to BASIC CONNECTION EXAMPLE on page 12.

__,_

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-0

I CONTROLS ANID FEATURES (cont'd)

REAR VIEW--------------

I HOW TO HANDLE BASIC

OPERATIONS

BASIC OPERATION-----------

1. Press the POWER switch to turn on the power.

,_______lFil-ON

- L_JI OFF

~ON : Power turns ON. (Power indicator: lit)

•OFF : Power turns OFF. (Power indicator: unlit)

i--- STATUS indication

I (PAL or NTSC) I

PAL

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To AC outlet+ ~,~ ----(230 V AC, I.._~ European-type 50 Hz/60 Hz)

~Audio B terminals [AUDIO BIN/OUT]

Input (IN) and output (OUT) terminals for the audio signals corresponding to the VIDEO B termi nals [ill or VIDEO B (Y/C) terminals ill]. The output terminal is bridge-connected.

IN : Audio signal input terminal

OUT : Bridge-connected audio signal output terminal

( Notes:)

• For corresponding video signals, use the VIDEO B

terminals [ill or VIDEO B (Y/C) terminals ill].

• Also refer to BASIC CONNECTION EXAMPLE on pages 12 and 13.

Remote terminals [REMOTE INPUT A/B, ASPECT]

Remote terminals for external control. Selecting INPUT A or INPUT Band the ASPECT RATIO is available via external control. External control is set in the <SET-UP MENU> screen. To use external control, you must build a switch cable and connect it to the REMOTE terminals.

External control functions

ASPECT RATIO 4-3 (4:3) 16-9 (16:9) INPUTA/B INPUT A INPUT B

( Notes:)

• Also refer to BASIC CONNECTION EXAMPLE on

pages 12 and 13.

External control switch

Open circuit Closed circuit

(open) (short)

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~AC inlet [AC IN]

Power input connector. Connect the provided AC power

cord ill] to an AC outlet (230 V AC, 50 Hz/60 Hz).

~I Power cord

Connects the provided power cord (230 V AC, 50 Hz/ 60 Hz) to the AC IN connector.

Caution:

This monitor includes two power cords: one with a United Kingdom-type plug and the other with a European-type plug. The plug on the United Kingdom-type power cord has a built-in fuse. Be sure to use the proper power cord for the AC outlet in your country. If neither can be used, please contact your dealer or qualified service personnel for the correct power cord.

2. Press the INPUT SELECT buttons to choose input.

Select video/audio signals input to terminals on the rear panel. The selected INPUT SELECT indicator lights in green.

INPUT

SELECT

button

(i) Input A

(VIDEO)

(D Input B

(VIDEO / Y/C)

* When both V IDEO B terminals are connected (input) at the same time, the

Y/C terminal is given priority.

Terminals on the rear panel

Video signal input Audio signal input

VIDEO A terminal AUDIO A terminal

VIDEO 8 terminal VIDEO 8 (Y/C) termina l

AUDIO 8 terminal

3. Press the VOLUME/SELECT buttons to adjust the speaker volume.

Press this button to display the speaker volume level on the screen.

+ : The Built-in speaker volume is increased. (00 --+ 50)

- : The Built-in speaker volume is decreased. (50 --+ 00)

• Screen indication will disappear about 10 seconds after operating.

PICTURE ADJUSTMENT---------

1. Press select buttons corresponding to the item you want to adjust.

The item you select is displayed on the screen.

[g) 0 (CJ (CJ

PH.A.SE Q-lFOv1A. 8RIG--!T GC.X'ffRAST

cb cb cb cb

2. Adjust with the VOLUME/SELECT buttons.

[@}~

CD PHASE ( ,cib ) : Phase control

0 CHROMA ( ~) : Chroma control

G) BRIGHT ( <) ) : Brightness control

G) CONTRAST ( c) ) : Contrast control

Items

PHASE (Phase)

CHROMA

(Chroma)

BRIGHT

(Brightness) CONTRAST

(Contrast)

* Screen indication will disappear about 1 O seconds after operating.

VOLUME/SELECT button

- +

reddish greenish

lighter deeper

darker

lower higher

brighter

About the STATUS indication

• With the COLOR SYSTEM setting set to AUTO mode , when you turn on the power or select inputs, the colour system indication appears for about 3 seconds on the screen while PAL or NTSC signals are being detected

It does not appear when receiving a

8/W signa. I o.r when no signal is input I

Refer to page 8 for more 1nformat1on about COLOR SYSTEM setting and page 9 for more ,nformat,on about STATUS 1nd1cat1on setting

00 ~ 50

,owMe [+-

-- 1-+

PHASE

--1-+

( Notes: J

• Phase cont rol is effective only in the NTSC colour system mode.

• Chroma control is not effective when receiving 8/W or when no signal is input. (Except when a component signal is input.)

• When CHROMA is adjusted to "-40," the picture becomes less colourful.

• "NO EFFECT' is displayed (for about 3 seconds) when your selected function has no effect.

--.J

HOW TO USE THE MENU FUNCTIONS

DISPLAY AND SELECTION IN THE <MENU> SCREEN MODE (SETTING)--------

You can set the following menu items. Set them depending on your needs.

• SHARPNESS • COLOR SYSTEM

• COLOR TEMP. • ASPECT RATIO

1. Press the MENU button.

The <MENU> screen is displayed.

• The screen automatically disappears when no operation is performed after about 5 minutes.

2. Press the PHASE ( t:ll:J) or CHROMA ( ~ ) button

to select MENU items.

A selection mark

Front panel Function button displayed

PHASE (th,) CHROMA (i.'b)

(►)

is put next to the selected item.

Contents

...

Forward selection mark Reverse selection mark

•

3. Press the VOLUME/SELECT buttons to set.

11 CZ!Jlj]

Menu items Purpose

SHARPNESS COLOR TEMP.

COLOR SYSTEM

ASPECT RATIO Aspect ratio

Front panel Function button

VOLUME/

SELECT(+)

VOLUME/

SELECT(-)

Picture sharpness Colour temperature of

white balance Colour system

displayed

►

◄

Contents

Increase (to max. value) Forward the setting value Decrease (to min. value) Reverse the setting value

Setting range

oo-+1-····

9300- 6500

AUTO - NTSC - AUTO - PAL

4-3-16-9

·········- +39-+40

I I

4. If you want to set the other menu items, repeat procedures 2 and 3.

5. Press the MENU button to quit.

Front panel button displayed

Function

Quit (or Release) the <MENU>

EXIT

screen

Contents

(►)

<MENU> screen

►

SHARPNESS COLOR TEMP. COLOR SYSTEM ASPECT RATIO

G) Selection

mark(►):

menu item you select.

CD Menu item: Menu items you can

select.

G) Setting display: Indicates the current

settings (value).

the front panel buttons (7 buttons on the left) correspond to the function displayed.

Function displayed

T Forward the menu item.

...

Reverse the menu item.

Lower the adjustment value. (to the minimum)

Raise the adjustment

value. (to the maximum) Forward the setting value.

►

Reverse the setting value.

◄

EXIT Ex~s the <MENU> screen.

• When the screen aspect ratio is set to 16 • 9 (16:9) in ASPECT RATIO, the picture will be vertically reduced.

<MENU>

Indicates the

Contents

DISPLAY AND SELECTIONS IN THE <SET-UP MENU> MODE (SETTING)

You can set the following set-up menu items.

• H. POSITION • CONTROL LOCK • ASPECT REMOTE

• V. POSITION • STATUS DISPLAY

• WHITE BALANCE • INPUT REMOTE

( Notes:)

• Parameters for H. POSITION and V. POSITION can be set separately depending on

the video input (Input A (VIDEO) or Input B (VIDEO /Y/C)) selected by the input select buttons on the front panel. Select the required video input with the input select buttons on the front panel in advance .

• WHITE BALANCE can be set individually at 6500 or 9300 for the colour temperature value. Set CO LO R TEMP. to the value 6500 or 9300 in the <MENU> screen in advance.

1. While pressing the MENU button, press the

PHASE ( t:ll:J ) button.

The <SET -UP MENU> screen is displayed .

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• The screen automatically disappears when no operation is performed after about 5 minutes.

2. Press the PHASE ( ~ ) or CHROMA ( ~ ) button

to select the desired menu item.

A selection

mark(►)

is put next to the selected item .

Front panel Function button displayed

PHASE (th,) T CHROMA(i;'b)

•

Contents

Forward selection mark Reverse selection mark

(►)

3. Press the VOLUME/SELECT buttons to set.

Front panel button

• VOLUME/

SELECT(+)

VOLUME/

SELECT(-)

( Notes:}

• For the WHITE BALANCE setting , select the CUT OFF or DRIVE setting screen, then select the buttons (PHASE/ CHROMNBRIGHT) corresponding to the function indicated (R/G/B).

• Press the EXIT (MENU) button to return to the <SET·UP MENU> screen .

Function displayed

►

CUTO Selects CUT OFF setting screen

- Decrease (to min. value)

◄

DRV Selects DRIVE setting screen

Contents

Increase (to max. value) Forward the setting value

Reverse the setting value

<SET-UP MENU> screen

<SET-UP MENU>

►

H. POSITION 00

V. POSITION 00

WHITE BALANCE CONTROL LOCK STATUS DISPLAY INPUT REMOTE ASPECT REMOTE

G) Selection

mark(►):

menu item you select.

CD Menu item: Menu items you can

select.

G) Setting display: Indicates the

current settings (value).

CD Function display: The functions of

the front panel buttons (7 buttons on the left) correspond to the function displayed.

Function

displayed

T Forward the menu item.

Contents

... Reverse the menu item.

lower the adjustment

value. (to the minimum) Raise the adjustment

value. (to the maximum) Forward the setting value.

►

Reverse the setting value.

◄

Exit the <SET-UP MENU>

EXIT

screen. (release) Selects DRV adjustment.

DRV

Selects CUT OFF

CUTO

adjustment. Adjusts red signal level.

Adjusts green signal level.

Adjusts blue signal level.

Turns the ON-SCREEN display on or off. (This

DISP function is effective only

in the DRIVE or CUT OFF adjustment mode.)

Indicates the

I HOW TO USE THE MENU

FUNCTIONS (cont'd )

HOW TO INITIALISE THE

SETTING

-0

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(j)

Set-up menu items

H. POSI TION Adjusts the horizon tal posit ion of

V. POS ITION Adjusts the vertical position on the

WHITE BALANCE

!DRIVE IRDRIVE - -

I is.DRIVE - -

icuT OFF~~~~ -=

I G. CUTOFF

jB. quroFF -

CONTROL LOCK Sets the operation buttons on the

STATUS DISPLAY Sets the status disp lay of the colour

INPUT REMOTE Sets external control of input

ASPECT REMOTE Sets external contr ol of the aspect

- ----------- ------ --- -------- --

Purpose Settings

the screen(+: Horizontal position shifts to the righV- : Horizontal position shifts to the left)

screen(+ : Vertical position moves down/- : Vertica l position moves up)

Adjusts the white balance

Adjusts red level __ _____ Adjusts blue level ____ __ Adjusts red cut off ______ Adjusts green cut off ______ Adjusts blue cut off

front panel to control lock mode

system

selection (INPUT A/B)

ratio

- os --04- ••···· - -01 - 00- +01-••···•- +04- +os

-05 --04-••····- -01 - 00 - +01- ••···• -+04- +05

Selects DRIVE (DAV) or CUT OFF (CUTO) adjustment. Screen setting is changed to the selectE!d setting mode . Select R/G/B buttons corresponding to the function display to adjust.

- 20 --19-••··•--01-oo-+01-•u••-+19-+20 __

-20 --19 ...... .. - -01-00-+01-••··•-+19-+20 __

- 20--19 ........ ➔

------ -- --- ------ - -

-20 --19-••··•--01-oo- +01- u•u -++19-+20

- 20 - - 19- •••u-+ -01-oo-+01-••··•-+19-+20

OFF .... ON

ON - OFF

OFF+-+ A/B

OFF - ON

4. To set the other set-up menu items, repeat the procedures 2 and 3.

5. Press the MENU button to quit.

Front panel Function

button displayed

MENU EXIT

Contents

Quit (or Relea se) the <MENU> screen

-01-00-+01-••

( Notes: J

• When the CONTROL LOCK function is

• The CONTROL LOCK function is

• To turn off the CONTROL LOCK

• Even when the CONTROL LOCK

• The STATUS DISPLAY function can be

• When the INPUT REMOTE function is

• The INPUT REMOTE function is valid

.. •-+19-+20

set to ON, pressing operation buttons on the front panel will display the message "CONTROL LOCK ONI" on the screen for about 3 seconds.

maintained even when the power is turned off.

function, while holding the MENU button press the PHASE button. Then set the CONTROL LOCK function to OFF.

function is set to ON, the following operations are available:

- Power Switch operation·

- Volume control with the VOLUME/ SELECT buttons

- External control when INPUT REMOTE or ASPECT REMOTE is valid

- Display or disappear of the <SET-UP MENU> screen.

set to display (ON) or not display (OFF) the present colour system when the power is turned on or the input signal is changed. Refer to page 7 for more

information .

valid (A/B), pressing the Input A or Input B buttons will display the message "REMOTE ON I" on the screen for about 3 seconds.

(A/B) after quitting the <SET-UP MENU> screen.

SCREEN DISPLAY AND SELECTIONS IN THE <SET-UP MENU> RESET MODE-------

You can set <MENU> and <SET-UP MENU> screen items, picture adjustment items and the volume level to thei r factory-set (init ial) values .

1. Press the Power (CD) switch to turn the power OFF(Jl.).

(I)

-----f'Fll-oN

I QFF

2. While pressing both MENU button and PHASE ( ~ ) button, press the Power (CD) switch to turn the power ON(--.) .

The <SET-UP MENU> RESET screen is displayed .

• The screen automatically disappears when no operation

c/c/o-g~F

PHASE r.elJ POMcR

is performed after about 5 minutes.

( Note:}

• The <SET-UP MENU> RESET screen will not be displayed if the MENU or PHASE buttons are pressed

for a very short time . Keep pressing them until the display screen appears.

3. Setting

I • Initial isation is required .

()

[CJ

Press the CONTRAST ( ct ) button .

• Initialisation is completed, and the <SET-UP MENU>

RESET screen disappears.

I • Initialisation is not required.

Press the VOLUME/SELECT[+] or[-] button.

* Initialisation is aborted , and the <SET-UP MENU>

RESET screen disappears .

<SET-UP MENU> RESET screen

<SET-UP MENU> RESET

Are you sure ?

"Yes" then <CONTRAST~

"No" then <+> or <->

Initial settings

Functions (Items)

SHARPNESS 00

COLOR TEMP. 6500

:::,

COLOR SYSTEM AUTO

ASPECT RATIO

H. POSITION V. POSITION 00

WHITE BALANCE

R. CUTOFF

1;l

G. CUTOFF

:::,

B. CUTOFF

R. DRIVE

::;

a. B. DRIVE

:::,

CONTROL LOCK OFF

t-.!.

STATUS DISPLAY ON

INPUT REMOTE OFF ASPECT REMOTE OFF

PHASE 00

CHROMA 00

CONTRAST 00 BRIGHT

VOLUME 20

lnltlalisatlon (setting)

4-3

00 00 00 z 00 00

I BASIC CONNECTION EXAMPLE

• Before connecting your system, make sure that all units are turned off.

• The illustration below shows some examples of different connections. Termina l connections may differ depending on the component connected. Be sure to refer to the instructions provided with the unit(s) you are connecting. ·

• Each pair of input (IN) and output (OUT) terminals are bridge-connected.

• If you're not connecting any equipment to a bridged output (OUT) terminal, be sure not to connect any other cables to the bridged output (OUT) terminal as this will cause the terminating resistance switch to open (auto terminate function).

• When making a bridge connection, connect the input (IN) and output (OUT) terminals on the monitor to separate video components. (For example, if both terminals are connected to the same VCR, resonance may occur except during playback. This is caused by the same video signal "looping" between the VCRs, and is not a malfunction.)

• Select the video input (INPUT A (VIDEO) or INPUT B (VIDEO /Y/C)) with the INPUT SELECT buttons on the front panel. When both VIDEO B terminals are connected (input) at the same time, the Y/C terminal is given priority.

• The ASPECT RATIO or INPUT NB settings can be controlled via the REMOTE terminal by setting ASPECT REMOTE or INPUT REMOTE in the <SET-UP MENU> screen to valid. (Refer to pages 9 and 10.)

■

VIDEO A Connection Example (Select Input A (VIDEO))

■

VIDEO B (Y/C) Connection Example (Select Input B (Y/C))

~o~

Video Camera

Y/C (S-video) -

/Y/C(S-video)slgflalcable)

Video Monitor

□

~o~ '

l~~~UT

]i7E

OUT

Y/C (S-video) -

(Y/C(S-video}slgna lcable)

VCR

---J

<J) <J)

Video Camera

Video Monitor

VCR

■

VIDEO B (VIDEO) Connection

Example (Select Input B (VIDEO))

Video Camera

Video Monitor

□

VCR

External control switch

External control >---~----< functions Open circuit Closed circuit

INPUT AIB INPUT A INPUT B

Audio -.

(AudlosignalcableJ

Video-.

(Vldeoalgtl81cabfe)

Audio....,

(Audio&iQnalcable)

External control switch

(open) (short)

- - - - -- - -- - - - - -·

REMOTE -

1 IR&motecable)

1--~[<l'>------.-,,.-..i

.- REMOTE

(RemolecableJ

-. : Signal Flow

Video -.

(Vid&osignalcable)

Video -.

(Videosignelcable)

Audio.-....

(Audio signal cable)

1=~

VCR

Video Monitor

□

VCR

Video Monitor

□

External control switch

RCA pin

External control I functions

ASPECT RATIO 4--3 (4:3) I 16-9 (16:9) :

closedcircuit{short)

External control switch I

Open circuit 1Closedcircui1

I open) (short)

--------------

Audio......_

(Audio signal cable)

Audio ....,

1-------------,,....,"""'

(Audiosignalcable)

(Remote cable)

: Signal Flow ASPECT RATIO 4-3 (4:3) I 1s-9 (16:9) :

Video Monitor

□

External control switch

closedcircuit(short)

External control

functions Open circuit !Closed circuit I

External control swttch I

(open) (short) I

---- ----------

I TROUBLESHOOTING

Solutions to common problems related to your monitor are descri bed here . If none of the solutions presented here

solves the problem, unplug the monitor and consult a JVC-author ised dealer or service centre for assistance.

Problems Points to be checked

No power supply. Is the power plug loosened or disconnected? No picture with the Is the video signal output from the connected

power on . component?

No sound. Is the audio signal output from the connected

Shaking picture. Is the monitor close to a device generating a Move the device away from the monitor until the

No colours , wrong colour, or dark picture.

Unnatural, Irregula rly coloured, or distorted other device generating a strong magnetic field? the monitor 's p9wer off. Wait at least 30 minutes, picture.

-Dark stripes appear Is the aspect ratio set to 16:9? Set ASPECT RATIO in the <MENU> screen to

at the top and bottom [4 : 3 (4 - 3)]. (See page 8.) of the screen , picture When controlling externally, ASPECT RATIO vertically squeezed. should be set to [4 : 3 (4 - 3)].

The overall picture size is too small.

Function buttons on Has control of the buttons been locked? (Has the front panel do not function.

The INPUT SELECT buttons do not the INPUT REMOTE function been set to valid screen to OFF. (See pages 9 and 10.) function. (A/B)?)

Is the input signal selected properly?

Is the video cable disconnected? Connect the video signal cable firmly.

component? Is the volume output set to minimum? Adjust the speaker volume with the VOLUME/

Is the audio cable disconnected? Connect the audio signal cable firmly.

strong magnetic field? picture stabilises. Is the colour system selected properly? Set COLOR SYSTEM in the <MENU> screen to

Has the picture control setting (CONTRAST, Set each picture control to the standard setting. BRIGHT, CHROMA or PHASE) been changed? (See page 7.)

Is the monitor close to a speaker, magnet or any Move the device away from the monitor and turn

Has the UNDER SCAN button been pressed so Press the UNDER SCAN button to turn off the the UNDER SCAN indicator lights? indicator. (See page 4.)

the CONTROL LOCK function been set to ON?) screen to OFF (See pages 9 and 10.)

Is input selection under external control? (Has Set INPUT REMOTE in the <SET-UP MENU>

Firmly insert the power plug. Set the connected component correctly.

Select the required video signal input with the Input select button. (See page 7.)

(See pages 12 and 13.) Set the connected component correctly.

SELECT button. (See page 7.)

(See pages 12 and 13.)

AUTO. (See page 8.)

then turn the power on again.

(See pages 12 and 13.)

Set CONTROL LOCK in the <SET-UP MENU>

Measures (Remedy)

I SPECIFICATIONS

■

Type

■

Colour system

■

Picture tube 36 cm measured diagonally,

■

Effective screen size Width 280.8 mm

■

Scanning frequency

■

Horizontal resolution

■

Input terminals

REMOTE INPUT A/B 1 line, RCA pin x 1

VIDEO A : Composite video :

VIDEO B : Composite video:

AUDIO A 1 line (monaural) , RCA pin x 2

AUDIO B 1 line (monaural), RCA pin x 2

REMOTE ASPECT 1 line, RCA pin x 1

Colour video monitor PAL, NTSC (3.58)

90° deflection , in-line gun, trio-dot type (phosphor dot-trio pitch 0.28 mm)

Height 210.6 mm Diagonal 335.4 mm (H) 15. 734 kHz (NTSC)

15.625 kHz (PAL)

(V) 59.94 Hz (NTSC)

50 Hz (PAL) 750 TV lines or more (Y/C input mode)

1 line, BNC connector x 2, 1 V(p-p), 75 .n, negative sync (bridge connection possible, auto termination)

Y IC-separated:

1 line, mini-DIN 4-pin connector x 2 Y: 1.0 V(p-p), 75 .n C (BURST) : 0.286 V(p-p) , 75 .n (NTSC)

0.3 V(p-p), 75 .n (PAL) (bridge connection possible, auto termination)

0.5 V(rms) , high-impedance (bridge connection possible)

0.5 V(rms), high-impedance (bridge connection possible)

■

Audio power output

■

Built-in speaker

■

Environmental conditions

■

Power requirements

■

Power consumption

■

Dimensions

■

Weight

■

Accessory

1 W (monaural) 8 cm round x 1 impedance of 8 .n

Operation temperature :

0 °C-40 °C

Operation humidity :

20 % - 80 % (non-condensing)

230 V AC, 50 Hz/ 60 Hz

0.5 A (230 V AC) Width 346 mm Height 310 mm Depth 375 mm

13.4 kg AC power cord (2 m) x 2

+'>-

""'O

The follow ing are not malfunct ions:

• When a bright still image (such as a white cloth) is displayed for a long period, it may appear to be coloured . This is due to the structure of the cathode ray tube and will be deleted when another image is displayed .

• You experience a mild electric shock when you touch the picture tube. This phenomenon is due to a normal buildup of static electricity on the CRT and is not harmful.

• The monitor emits a strange sound when the room temperatu re changes suddenly. This is only a problem if an abnormality appears on the screen as well.

• If two or more monitors are operated next to each other, their images may shake or be distorted. This phenomenon is due to

mutual interference ; it is not a malfunction. Move the monitors away from each other until the interference disappears or turn

the power off on any monitor that is not being used.

• Illustrations used in this manual are for explanatory purposes only. The appearance of the actual product may differ slightly.

• Dimensions and weight are approximate.

• E. & 0. E. Design and specifications subject to change without notice.

SAFETY PRECAUTIONS

TM-H140PN

1. The design of this product contains special hardware, 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 products should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

3. 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 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 on the schematics and by (Lt.) on the parts list in 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

cause shock, fire, or other hazards.

4. Don't short between the LIVE side ground and ISOLATED

(NEUTRAL) side ground or EARTH side ground when

repairing.

Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( 1-) side GND, the

ISOLATED(NEUTRAL) : ( J,) side GND and EARTH : (@) side GND. Don't short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.)

the LIVE side GND and ISOLATED(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.

5. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY) .

6. 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 damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be

prevented. If severe arcing 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 voltage circuitry

including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product.

9. Isolation Check

(Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals , Control knobs, metal cabinet , screw heads, earphone jack, control shafts, etc .) to be sure the product is safe to operate without danger of electrical shock .

(1) Dielectric Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second.

( .... Withstand a voltage of 11 DOV AC ( r.m.s.) to an appliance

rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade.

(2) 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, etc.). Any leakage current must not exceed

0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA 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 having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1 soon 1 OW resistor paralleled by a 0.15 µF AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). 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 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.). However, in tropical area, this must not exceed 0.3V AC ( r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER (HAVING 1000 D.N, OR MORE SENSITIVITY)

PLACE THIS PROBE ON EACH EXPOSED METAL PART

GOOD EARTH GROUND

7. 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 a 1 0kQ 2W resistor to the anode button.

8. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred ,

those components that indicate evidence of overheating should

be replaced. Always use the manufacturer's replacement

components.

No.51766

TM-H140PN

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

[CAUTION]

* Even with the power switch off, some parts of the set are live. Be

sure to disconnect the power cord from the AC outlet before disassembly and reassembly.

CHECKING THE PW BOARD

To check the back side of the PW board. (1) Pull out the chassis. (2) Erect the chassis vertically so that you can easily check the back

side of the PW board.

REMOVING THE TOP COVER

1. Remove the 8 screws marked ® .

2. Slightly spread the bottom of the top cover. Shift the cover rearward and raise it upward to remove it.

REMOVING THE REAR PANEL

• After removing the top cover.

1. Remove the 7 screws marked @ .

2. Shift the top portion of the rear panel slightly rearward and raise it upward to remove it.

REMOVING THE TERMINAL BRACKET

• Remove the top cover and rear panel.

1. Remove the 6 screws marked © , 1 screw marked @ and 1 screws marked ® .

2. Slightly shift the terminal bracket rearward and raise it upward to remove it.

REMOVING THE TRANSF. HOLDER

• Remove the top cover and rear panel.

1. Remove the 1 screw marked ® and remove it.

[CAUTION]

* When erecting the chassis, be careful so that there will be no

contacting with other PW board.

* Before turning on power, make sure that the CRT earth wire

and other connectors are properly connected.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires With a new cable tie.

CAUTION

• Befor turning on power, make sure that the spiral wire

(yellow/ green) are properly connected.

FBT TRANSF

REMOVING THE CHASSIS BASE

• Remove the top cover and rear panel.

1. Withdraw the chassis backward. If neceaasry, take off the wire clamp, connectors etc.

REMOVING THE BOTTOM COVER

• Remove the chasssis base.

1. Plase the front surfase downward, then stand the bottom cover while facing it toward you. At this time, care must be exercised not to damage the front panel and CRT surface.

2. Remove the 2 screw marked® as shown in the figure pull the bottom cover upward.

No.51766

SPIRAL WIRE

FRONT

PANEL ASS'Y

TM-H140PN

FRONT

CONTROL PWB

INPUT PWB

POWER CORD

~FOOT

No.51766

Fig.1

TM-H140PN

REPLACEMENT OF MEMORY IC

1. MEMORY IC

This model uses memory IC. In the memory IC is memorized data for correctly operating the video-chroma and deflection circuits. When replacing memory IC, be sure to use IC written with the initial values of data.

2. PROCEDURE FOR REPLACING MEMORY IC

(1) Power off

Switch the power off and unplug the power plug from the wall outlet.

(2) Replace IC

Be sure to use memory IC written with the initial data values.

(3) Power on

Connect the power plug into the wall outlet and turn the power on.

(4) Check and set SET-UP MENU

1) Press the MENU key and the PHASE key simultaneously.

2) The SET-UP MENU screen (Fig. 1) will be displayed.

3) Check the setting value of the SET-UP MENU table. If the value is different, select the setting item with the

PHASE/ CHROMA (

value with the VOL/ SELECT ( Q / G ) key.

4) Press the MENU key, and return to the normal screen.

• Setting of SERVICE MENU

Confirm the initial settings of the SERVICE MENU and reset where necessary. For setting, refer to the SERVICE ADJUSTMENTS .

Front Panel Function

button Displayed

PHASE

CHROMA

1 BRIGHT

CONTRAST DISP

MENU EXIT

.A. Reverse the menu item.

G Adjusts green signal level.

VOLUME/ SELECT(-)

VOLUME/ SELECT(+)

◄

DRV Select DRV adjustment.

►

CUTO

/ [ij) key, and set the correct

Contents

Forward the menu item. Adjusts red signal level.

Adjusts blue signal level. Turns the ON-SCREEN display on

or off. (This function is effective only in the DRIVE or CUT OFF adjustment mode.)

Exit the <SET-UP MENU> screen. (release)

Lower the adjustment value. (to the minimum)

Reverse the setting value.

Raise the adjustment value. (to the maximum)

Forward the setting value. Selects CUT OFF adjustment.

SET-UP MENU

< SET-UP MENU>

►

H.POSITION

V.POSITION : 00 WHITE BALANCE CONTROL LOCK : OFF STATUS DISPLAY : ON INPUT REMOTE : OFF ASPECT REMOTE : OFF

: 00

~000880)

SET-UP MENU

, , < SET-UP MENU>

►H.

POSITION-

:V.POSITION :::00 : 'WHITE BALANCE '' ,_' ___ __.__. 3

2 >--+------1,STATUS DISPLAY :::ON :

:CONTROL LOCK :::OFF:

:INPUT REMOTE :::OFF: :ASPECT REMOTE ~:OFF:

I_ - - - -- - - - -- - - - -- _I 1_ - - -

-----:{oo--:

I ! ! / ! I !

I I : : : I I _____

L I I L-~-=--=-.=:----1 I

\ i L_:;---7 I \ \

I I I I I I

CD Selection

mark(►):

Indicates the menu item you select.

@ Menu item : Menu items you can select.

G) Setting display : Indicates the current settings (value).

® Function display : The functions of the front panel

buttons (7 buttond on the left) correspond to the function dispayed.

Fig. 1

No. 51766

INITIAL SETTING OF THE SET-UP MENU TABLE

TM-H140PN

Setting item

H. POSITION

V. POSITION

WHITE BALANCE

CONTROL LOCK

STATUS DISPLAY

INPUT REMOTE

ASPECT REMOTE

Setting content I Range Initial setting

-05 ~ +05

CUTOFF

(R/G/B)

DRIVE

(R / B)

►

ON --.

►

OFF --. A/ B I

►

OFF--.

--.

-20 ~ +20

OFF I OFF I

INITIAL SETTING OF THE MENU SCREEN TABLE

Setting item

SHARPNESS

Setting content/ Range Initial setting

00 ~ +40

OFF

COLOUR TEMP .

COLOUR SYSTEM

ASPECT RATIO

AUTO_. NTSC -. AUTO -.

9300 __. 6500

r 4-3

-+ 16-9 7

INITIAL SETTING OF FRONT PANEL CONTROLS

Control item

INPUT SELECT

UNDER SCAN

CONTRAST

BRIGHT

CHROMA

PHASE

VOLUME

Initial setting

OFF

PAL-I

6500

AUTO

4-3

No. 51766 7

TM-H140PN

BLOCK SELECT ADJUSTMENT ITEM

1.SIGNAL BLOCK

SERVICE

Number

S01 S02 CONTRAST

S03 S04 CHROMA(NTSC) S05 PHASE(NTSC) S06 BRIGHT(under scan) SO? CONT.(under scan) S08 S09

INPUT SIGNAL CONTENTS

BRIGHT

VIDEO

CHROMA(PAL)

PHASE(PAL) CONT. TRACKING

3.DEFLECTION BLOCK

SERVICE

Number

001 002

003 004 005 006 007 008

SCAN SIZE

ASPECT

RATIO

NORMAL

VERTICAL

FREQUENCY

50Hz

CONTENTS

HORIZONTAL CENTER HORIZONTAL SIZE VERTICAL CENTER VERTICAL SIZE VERTICAL LINEARITY VERTICAL S-CORRECTION E-W PARABORA E-W CORNER

* In addition to the ones listed above, the following DEF. BLOCK are also

available. DA1 ~ DA8 (Normal/ 6GHz), DB1 ~ DB8 (16:9 / 50Hz) DC1 ~ DC8 (16:9 / 60Hz) 001 ~ 008 (UNDER SCAN,4:3 / 50Hz) DE1 ~ DE8 (UNDER SCAN,4:3 / 60Hz) OF?, DF8 (UNDER SCAN, 16:9 / 50Hz) DG7, DG8 (UNDER SCAN,16:9 / 60Hz)

2.WHITE BALANCE

SERVICE

Number

W01 R. CUTOFF W02 G. CUTOFF W03 B. CUTOFF W04 W05 B. DRIVE(6500) W06 R. DRIVE (9300) WO? B. DRIVE (9300)

W08

W09

W10

INPUT SIGNAL CONTENTS

VIDEO

R. DRIVE (6500)

R. CUTOFF

(UNDER SCAN) G.CUTOFF

(UNDER SCAN) B. CUTOFF

(UNDER SCAN)

4.CONTROL BLOCK (This is a fixed type Don't adjust it.)

SERVICE

Number

• DESTINATION 000:JAPAN/001 :EUROPE

C01

CO2 C03 C04

cos

C06 CO?

COB

C09 C10 C11 C12 C13 C14

C15 C16 C17 C18 C19 V-SS. CR C20

C21 C22

002~011: Undefine

BRIGHT POINT

CONTRAST POINT

CHROMA POINT

PHASE POINT

OSD HORIZONTAL POSITION OSD VERTICAL FREQUENCY (5GHz) OSD VERTICAL FREQUENCY (6GHz) BRIGHT (SINGLE HORIZONTAL LINE) SHARP (CENTER VALUE)

HVT-H. HVT-V. HVT-H. (UNDER SCAN) HVT - V. (UNDER SCAN)

TRAPEZ HOUR METER (100H UNIT) BLUE CHECK (ON/ OFF)

ITEM

UPPER LOWER UPPER LOWER UPPER LOWER UPPER

LOWER

TYPE

(Do not adjust)

FIXED

l l l l l l l l l l l l l l l l l l

l l l

No. 51766

TM-H140PN

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT

1. Confirm the proper AC power voltage is being supplied .

2. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes.

3. The setting is made on basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

4. Use care not to disturb controls and switches not mentioned in the adjustment items.

ADJUSTMENT SETTINGS

For the functions except for those which must set the values every time during the adjustment procedure, begin to make adjustments after returning the setting values to the initial values while referring to the table in page 7. If each value of the functions has not been initialized, the

adjustments cannot be made properly .

ADJUSTMENT ITEMS

■ MEASURING INSTRUMENTS FIXTURE AND STANDARD SIGNAL

■

ADJUSTMENT LOCATIONS

■

REPLACEMENT OF CHIP COMPONENT

■

BASIC OPERATION OF SERVICE MENU

■

SERVICE MENU COMPOSITION CHART

■ INITIAL SETTING OF THE SERVICE MENU ADJUSTMENT ITEMS

■ ADJUSTMENT METHOD

■

DEFLECTION CIRCUIT ADJUSTMENT

■

SELF DIAGNOSIS FUNCTION

No.51766

TM-H140PN

■

MEASURING INSTRUMENTS FIXTURE AND STANDARD SIGNAL

• FIXTURE

DC voltmeter (digital voltmeter) Oscilloscope Signal generator (PAL/NTSC systems) Colour analyger High voltage meter

The wave form of signals refer following figure.

• STANDARD SIGNAL

VIDEO SIGNAL (PAL/ NTSC COLOUR BAR)

0% SETUP

75% saturation

0.525Vb-w

FOCUS AND SCREEN ADJUSTMENT HOLES

• The FOCUS and SCREEN adjustment holes are on the rear panel.

[CAUTION] -----------------

Be sure to use a non-metalic driver for adjusting there VRs.

A metalic driver can cause damage by shorting.

Y / C SEPARATE SIGNAL(COLOUR BAR)

Y 0% SETUP

75%

BURST

, PAL: 0.3V(p-p)

: NTSC: 0.286V(p-p)

·r··--

0.525Vb-w

__ L

C 75% SATURATION

BURST

NTSC: 0.286V(p-p)

PAL : 0.3V(p-p)

·-··--··-+··-

CHROMA

LEVEL

CHROMAfBU-~~; ~;b

NTSC = 2.2 I 1

PAL= 2.3 / 1

No.51766

■

ADJUSTMENT LOCATIONS

TM-H140PN

FRONT CONTROL PWB

POWER

POWER s ~--: IN~L:T-A . ·r (+) (-) MENU BRIGHT PH~SE

LINE FILTER PWB

F901

o;;zrJ

AC INLET

1---1

MAIN PWB

[Q) ©l '~'

Ill UNDER SCAN

L_JtN0141 CONTRAST CHROMA

INPUT-B

IC NO 1 3 I

, ___ ,

FFCWIRE

VOL. / SELECT

i i i

CRT SOCKET PWB

(SOLDER SIDE)

TOP

•

CRT EARTH

(BRAIDED ASS'Y)

0(§]

INPUTPWB

I DEG[

LINE FILTER PWB

AC INLET

B1 (TP-91) NC X-RAY2 X-RAY1 TP-E( ,.),.. ) (GND) LB

CRT SOCKET PWB

UPPER: FOCUS LOWER SCREEN

No.51766

TM-H140PN

VIDEO A

VIDEO B

T·

BNC TYPE

FRONT

•

No.51766

■

REPLACEMENT OF CHIP COMPONENT

■

CAUTIONS

1. Avoid heating for more than 3 seconds.

2. Do not rub the electrodes and the resist parts of the pattern .

3. When removing a chip part, melt the solder adequately.

4. Do not reuse a chip part after removing it.

■

SOLDERING IRON

1. Use a high insulation soldering iron with a thin pointed end of it.

2. A 30w soldering iron is recommended for easily removing parts.

■

REPLACEMENT STEPS

1. How to remove Chip parts

♦

Resistors, capacitors, etc

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

2. How to install Chip parts

♦

Resistors, capacitors, etc

( 1) Apply solder to the pattern as indicated in the figure .

TM-H140PN

(2) Shift with tweezers and remove the chip part.

♦

Transistors, diodes, variable resistors, etc

(1) Apply extra solder to each lead.

SOLDER

(2) As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove the chip part.

SOLDER

(2) Grasp the chip part with tweezers and place it on the solder.

Then heat and melt the solder at both ends of the chip part.

♦

Transistors, diodes, variable resistors, etc

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the solder. (3) First solder lead A as indicated in the figure.

(4) Then solder leads Band C.

Note : After removing the part, remove remaining solder from the

pattern.

No.51766

TM-H140PN

■

BASIC OPERATION OF SERVICE MENU

1. SERVICE MENU ITEMS

With the SERVICE MENU, various settings can be made, and they are broadly

classified in the following items of adjustments.

SIGNAL BLOCK ........ .. .... This mode adjusts the data of the various signal

voltage controls .

WHITE BALANCE BLOCK-·. This mode adjusts the data of the WHITE

BALANCE adjustment.

DEFLECTION BLOCK .. ··· ... This mode adjusts the data of the DEFLECTION

circuit.

CONTROL BLOCK .... .... ... This mode adjusts the whole of the systems

(This is a fixed value, Don't adjust it.)

2. BASIC OPERATION OF THE SERVICE MENU (1) HOW TO ENTER THE SERVICE MENU

(D Press MENU key and CONTRAST key simultaneously . (Fig. 1) (2) The letter "S" appears at the upper left of the screen.(Fig. 2)

® Press MENU key and PHASE key simultaneously.

@ The screen display "PLEASE DON'T TOUCH ".(Fig. 3)

® Press+ key or - key to display the SERVICE MENU as shown in Fig. 4.

If step @ state continues for more than 5 seconds without a further operation, the display extinguishes and the mode is released.

SERVICE MENU

SERVICE MENU--11---H-+----t:;:- < BLOCK SELECT>

TITLE :SIGNAL BLOCK

SERVICE MENU - 'WHITE BALANCE BLOCK

ITEM - : DEFLECTION BLOCK

BLOCK SELECT--:::- ! G888 am _,:

ITEM

OPERA T 10 N --H~-I

KEY ._..__-_-;_"'";_-_-_-;_-;_-;_-;_-;_-;_-;_-;_-;:,-;,-;,-;,~;;;;;;;;;;;:;:;;;;~_,

• CONTROL BLOCK

mm□ □

m::rn:ri I r0 ,a ,a -o

Fig. 4 Fig. 3

Fig. 2

PLEASE, DON'T TOUCH !

•

14 No. 51766

+ 49 hidden pages

JVC TM-H140PN Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual