JVC AV-14F13/PH, AV-14F33/PH Service Manual

SERVICE MANUAL

COLOR TELEVISION

AV-14F13
AV-14F33

BASIC CHASSIS

GA2

RM-C372GY

[AV-14F13/PH]

RM-C373GY

[AV-14F33/PH]

AV-14F13
AV-14F33

/PH

/PH

CONTENTS

! SPECIFICATIONS ････････････････････････････････
!

SAFETY PRECAUT IONS ････････････････････････････････

!

FEATURES････････････････････････････････

! MAIN DIFFERENCE LIST ････････････････････････････････
!

FUN CTIONS

! SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
! SERVICE ADJUSTMENTS ････････････････････････････････
!

PARTS LIST ････････････････････････････････

★ OPERATING INSTRUCTIONS
★ STAND ARD CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････

1

････････････････････････････････････････････････････････････････

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･････････････････････････････････････････････････････････････

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････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････

････････････････････････････････････････････････････････････････

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

･････････････････････････････ 2

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･･･････････････････････ 5

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･････････････････････ 15

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････････････････････････････････････ 33

････････････････････････････････････････････････････････････････

･･ ･ 4

･･ ･･･ ･

･･

････

･････ 2- 1

･･････････

6

No.520 21

Jul. 2002

Jul. 200 2

A

V-14F13

A

V-14F33

SPECIFICATIONS

Items

Dimensions (W××××H××××D) 462mm×340.5mm×375mm

Mass 10kg

TV RF System CCIR (M)&(N)

Color / Sound System NTSC / PAL-M / PAL-N NTSC / PAL-M / PAL-N

TV Receiving Channels

and Frequency

CATV Receiv ing Channels

and Frequency

TV/CATV Total Channel 181 Channels

Intermediate Frequency Video IF Carrier

VL Band

VH Band

UHF Band

Low Band

High Band

Mid Band

Super Band

Hyper Band

Ultra Band

Sub Mid Band

Sound IF Carrier

(02～06) 54MHz～88MHz
(07～13) 174MHz～216MHz
(14～69) 470MHz～806MHz

(02～06)
(07～13)
(14～22)
(23～36)
(37～64)
(65～94, 100～125)
(01, 96～99)

45.75MHz

41.25MHz (4.5MHz)

AV-14F13

/PH AV-14F33/PH

(54MHz～804MHz)

Contents

BTSC (Multi Channel Sound)

Color Sub Carrier NTSC : 3.579545MHz

PAL-M : 3.57561149MHz

PAL-N : 3.58205625MHz

Antenna terminal

Power Input Rated Voltage

Oper ating Voltage

Power Consumption 42W 44W

Picture Tube (measured diagonally) Picture tube 36cm

High Voltage

Speaker

Audio Power Output 2W (monaural) 1.5W+1.5W (stereo)

Input Video input

Audio input

Output Video output

Audio output

Headphone Jack Stereo mini jack (dia. 3.5mm, Sound is Monaural) Stereo mini jack (dia. 3.5mm, Sound is Stereo)

Remote Control Unit RM-C372GY

75Ω(VHF/UHF) Terminal, F-Type Connector

110V～240V AC, 50Hz/60Hz
90V～260V AC, 50Hz/60Hz

Visible aria 34cm

22.5kV±1.0kV (at zero beam current)

5cm×12cm Oval type×2 (monaural) 5×12cm Oval type×2 (stereo)

1Vp-p, 75Ω (RCA pin jack)

500mVrms (-4dBs), High impedance
(RCA pin jack)

1Vp-p, 75Ω

500mVrms (-4dBs), Low impedance

RM-C373GY

(AA/R6/UM-3 battery×2)

(AA/R6/UM-3 battery×2)

Design & specifications are subject to change without notice.

2

No.52021

A

A

SAFETY PRECAUTIONS

V-14F13
V-14F33

1. The design of this product contains special hardware, many
circuits and components specially for s afety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manuf acturer.
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 circuitr y of the products should not be
made. Any design alterations or additions will void the
manufacturer's warrant y and will further relieve the manuf acturer
of responsibility for personal injury or property damage resulting
theref r om.

3. Many electric al and mechanical parts in the pr oducts 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 feat ures are identified by shading
on the schematics and by (!!!!) on the parts list in Service
manual. The use of a substitute replacement which does not

have the s ame 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 ISOLATE D

(NEUTRAL) side ground or EARTH side ground when
repairing.

Some model's power circuit is partly different in the GND. The
differenc e of the GND is shown by the LIVE : (") side GND, the
ISOLATED(NEUTRAL) : (#) 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 meas ure with a measuring apparatus (oscillosc ope etc.)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the s ame 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 (S ee
ADJUSTMENT OF B1 POWER SUPPLY).

6. The high voltage applied to the picture tube must conform with
that specified in Ser vice manual. Excessive high voltage can
cause an incr ease 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 maint ain 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 c omplete
product.

7. Do not check high voltage by drawing an arc. Use a high volt age
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 fr ame and c onnecting the other end of
the lead through a 10kΩ 2W resistor to the anode button.

8. When servic e is required, observe the original lead dress. Extra
precaution should be given to assure c orrect lead dr ess in the
high voltage circuit area. W here a short circuit has occurred,
those components that indicate evidence of overheating should
be replaced. Always use the manufacturer's replacement
components.

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 out put 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 shoc k.

(1) Dielectr ic 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 chass is should withstand a voltage of 3000V
AC (r.m.s.) for a period of one second.

(. . . . Withstand a voltage of 1100V 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 s ervice trade.

(2) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not us e a line
isolation transformer during this check.). Using a "Leakage
Current T ester", measure the leakage c urrent from each expos ed
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 us e 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 1500Ω 10W resistor paralleled by a 0.15µF
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, revers e the plug in the AC
outlet and repeat each measur ement. 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 Ω/V,
OR MORE SENSITIVITY)

0.15μF AC-TYPE

PLACE THIS PROBE

1500 Ω 10W

GOOD EARTH GROUND

ON EACH EXPOSED
METAL PART

No.52021

3

A

V-14F13

A

V-14F33

FEATURES

" New chassis design enables use of a main board with simplified

circuitry.

" Provided with miniature tuner (TV/CATV).
" PLL synthesizer system TV/CATV totaling 181 channels.
" Multifunctional remote control permits picture adjustment.
" Adoption of the VIDEO STATUS function.

" Adoption of the ON/OFF TIMER function.
" With 75ΩV/U in common (F-T ype) ANT Terminal.

" SLEEP TIMER for setting in real time.
" Wide range voltage (110V～240V) AC power input.

" With AUDIO / VIDEO INPUT & OUTPUT terminal.
" Closed-caption broadc ast c an be viewed.

4

No. 52021

A

A

MAIN DIFFERENCE LIST

Model Name

!

Part Name (Item)

MAIN PWB SGA-1066A SGA-1065A

FRONT CABINET LC-10831-028A-H LC-10831-027A-H

!

TERMINAL SHEET GG40021-002A-H GG40021-001A-H

SPEAKER CEBSS09D-05KJ2 CEBSS09D-03KJ2

!

PACKING CASE GG10056-079A-H GG10056-077A-H

REMOTE CONTROL UNIT RM-C372GY-1H RM-C373GY-1H

AV-14F13

/PH

AV-14F33

V-14F13
V-14F33

/PH

Color / Sound System NTSC / PAL-M / PAL-N

Power Consumption 42W 44W

Speaker

Audio Power Output 2W (monaural) 1.5W+1.5W (stereo)

5cm×12cm Oval type×2 (monaural) 5×12cm Oval type×2 (stereo)

NTSC / PAL-M / PAL-N
BTSC(Multi Channel Sound)

No. 52021

5

A

V-14F13

A

V-14F33

FUNCTIONS

■ FRONT PANEL

9

10

[AV-14F33/PH]

10 9

■ REAR TERMINAL

2

[AV-14F13/PH]

1

3 4

2

5

1

4

7

6

8

2

3

1

MENU buttons

CHANNEL －/＋ buttons

2

VOLUME －/＋ buttons

3

AI ECO sensor

4

REMOTE CONTROL s ensor

5

ON TIMER lamp

6

POWER lamp

7

MAIN POW ER button

8

A/V INPUT terminal

9

HEADPHONE jack

10

5

1

6

3

[AV-14F13/PH]

1

ANT Terminal

2

VIDEO INPUT Terminal

3

AUDIO INPUT Terminal

4

VIDEO OUTPUT Terminal

5

AUDIO OUTPUT Terminal

5

4

[AV-14F33/PH]

ANT Terminal

1

VIDEO INPUT Terminal

2

AUDIO L/MONO INPUT Terminal

3

AUDIO R INPUT Terminal

4

VIDEO OUTPUT Terminal

5

AUDIO L OUTPUT Terminal

6

AUDIO R OUTPUT Terminal

7

7

6

No. 52021

A

V-14F13

A

V-14F33

■ REMOTE CONTROL UNIT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

TV/VIDEO key

1

DISPLAY key

2

PICTURE BOOSTER key

3

CLOSED CAPTION key

4

SLEEP TIMER key

5

VIDEO STATUS key

6

COLOUR SYSTEMkey

7

100+ key

8

EXIT key

9

CHANNEL－/＋ key

10

POWER key

11

Number (CH.) key

12

RETURN＋key

13

HYPER SURROUND key

14

[AV-14F33

15

MENU key
MENU ▲/▼ key
MENU －/＋ key

16

MUTING key

/PH

Only]

This illustration is written about RM-373GY(AV-14F33/PH),
There are no key of HYPER SURROUND in the
RM-C372GY(AV-14F13/PH).

17

VOLUME－/＋ key

No. 52021

7

A

V-14F13

A

V-14F33

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug the power plug.

screws marked

2. As shown in figure, remove the

""""

.

marked

3. As shown in figure, remove the

4. Withdr aw the r ear cover toward you.

[CAUTION]
" When reinstalling the rear cover, c arefully push it inward after

inserting the MAIN PW B into the rear cover groove.

4

screws marked

2

REMOVING THE MAIN PW BOARD

" After removing the rear cover.

1. Slightly raise the both side of the MAIN PW BOARD by hand, and

from the front cabinet.

$%

remove the PWB stopper marked

2. W ithdraw the MAIN PW BOARD backward.
(If necessary, remove the wire clamp, c onnectors etc.)

$%

$%$%

and a screw

!!!!

####

REMOVING THE SPEAKER

" After removing the rear cover.

screws marked

1. As shown in figure, remove the

remove the speaker.

2

&&&&

CHECKING THE MAIN PW BOARD

1. To check the back side of the PW board.
(1) Pull out the MAIN PW board. (Refer to REMOVING THE MAIN

PW Boar d)

(2) Erect the PW Board vertic ally s o that you can easily c heck the

back side of the PW Board.

[CAUTION]

" When erecting the PW Board, be careful so that there will be no

contact ing with other PW Board.

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

and other connector are properly connected.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie us ed for tying the wires together.
Should it be inadver tently removed, be sure to tie the wires with
a new cable tie.

, then

8

No. 52021

A

A

FRONT CABINET

V-14F13
V-14F33

This exploded view describes

/PH

about AV-14F13

Although AV-14F 33

different from this figure, you

can use the exploded view for

disassembling the AV-14F33

in the same step as for the AV-

/PH.

14F13

CRT SOCKET PWB

MAIN PWB

.

/PH

is slightly

SPEAKER

E

(××××2)

/PH

SPEAKER

REAR COVER

E

(××××2)

POWER CORD

AV-14F13/PH

PWB STOPPER

D

AV-14F33/PH

(××××1)

B

(××××2)

C

(××××4)

A

No. 52021

9

A

V-14F13

A

V-14F33

MEMORY IC REPLACEMENT

1. Memory IC

This model uses a memory IC.
The memory IC stores data for proper operation of video and deflection circuits.
When replacing, be sure to use an IC containing this (initial value) data.

2. Memory IC replacement procedure

(1) Power off

Switch off the power and disconnect the power cord from the wall
outlet.

(5) Receive channel setting

Refer to the OPERATING INSTRUCTIONS (USER’S GUIDE)
and set the receive channels (Channels Preset) as described.

(2) Replace the memory IC.

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

(3) Power on

Connect the power cord to the wall outlet and switch on the
power.

(4) System constant check and setting

1) Simultaneously press t he DISPLAY key and VIDEO STATUS
key of the remote control unit.

2) The SERVICE MENU screen of Fig.1 is displayed.

3) While the SERVICE MENU is displayed, again simultaneously
press the DISP LAY and VIDEO STATUS keys to display the
Fig.2 SYSTEM CONSTANT screen.

4) Refer to the SYSTEM CONSTANT table and check the setting
items. W here these differ, s elect the s etting item with the
MENU UP / DOWN key and adjust the setting value with the
MENU LEFT / RIGHT keys.

5) After adjusting, release the MENU LEFT / R IGHT key to store
the setting value.

6) Press the EXIT key twice to r eturn the nor mal screen.

NAME OF REMOTE CONTROL KEYS

(6) User settings

Check the user setting items according t o Table 2.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER ’ S GUIDE) and set the items as
described.

(7) SERVICE MENU setting

Verify what to s et in the SERVICE MENU, and set whatever is
necessary. (Fig.1) Refer to the SERVICE ADJUSTMENT for
setting.

SERVICE MENU

PICTURE SOUND
VIDEO STATUS OTHERS
LOW LIGHT HIGH LIGHT
RF AFC CHK
VCO (CW) I2C BUS CTRL
SETUP TOUR(OFF)

Fig.1

EXIT BY

EXIT

IT

[ AV-14F33/PH Only ]

SELECT BY
OPERATE BY

DISPLAY

Key

VIDEO STATUS

Key

EXIT

Key

MENU －
(LEFT) Key

This illustration is written about RM-C373GY(AV-14F33/PH),

There are no key of HYPER SURROUND in the RM-C372GY

(AV-14F13/PH).

10

POWER Key

NUMBER Key

MENU
(UP) Key

MENU ＋
(RIGHT) Key

MENU
(DOWN) Key

No.52021

SYSTEM CONSTANT

VIDEO :
AUDIO :
VARI. OUT : NO
GAME : YES
CINEMA : YES

SELECT BY
OPERATE BY

SYSTEM CONSTANT

CCD : YES
RETURN+ : YES
SURROUND :

M37272M8-

SELECT BY
OPERATE BY

×××

×××

××××××

SP

****
***

***

******

***

***

******

Fig.2

EXIT BY

EXIT

EXIT BY

EXIT