JVC AV-29M201 Service Manual
A
SER VICE MANUAL
COLOR TELEVISION
AV-29M201
V-29M201
BASIC CHASSIS
GA
CONTENTS
SPECIFICATIONS
!
SAFETY PRECAUTIONS
!
FEATURES
!
FUNCTIONS
!
SPECIFIC SERVICE INSTRUCTIONS
!
SERVICE ADJUSTMENTS
!
★
STANDARD CIRCUIT DIAGRAM (APPENDIX)
PARTS LIST
!
1
････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ･････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ･･･････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ･････････････
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ･････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ･････
････････････････････････････････････････････････････････････････
････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
･････････････････････････････
･･････････････････････････････････････････････････････････
･･･････････････････････
･･････････････････････････････････････････････
････････････････････････････････ ･･
････････････････････････････････････････････････････････････････
･････････････
･･････････････････････････
･････････････････････
･･････････････････････････････････････････
･････
･･････････
････････････････････････････････ ････
････････････････････････････････････････････････････････････････
･･･
･･････
･･
････
2
3
4
5
6
11
2-1
27
No.51731
May 2000
A
V-29M201
SPECIFICATIONS
Items Content
Dimensions (W
Mass
TV System and Color system
TV RF System
Color System
Sound System
TV Receiving Channels and Frequency
VL Band
VH Band
UHF Band
ATV Receiving Channels and Frequency
Low Band
High Band
Mid Band
Super Band
Hyper Band
Ultra Band
Sub Mid Band
TV/CATV Total Cha nne l
Intermediate Frequency
Video IF Carrie r
Sound IF Carrier
Color Sub Carrier
Power Input
Power Consumption
Picture Tube
High Voltage
Speaker
Audio Power Output
Input (1, 2)
Variable Audio Output
Antenna te rminal
Accessories
××××H××××
D)
25-3/4”×23-3/8”×20-1/2” / 65.4cm×59.1cm×51.8cm
67.8Ibs / 30.8kg
CCIR(M)&(N)
NTSC / PAL-M / PAL-N
BTSC (Multi Channel Sound)
(02～06) 55.25MHz～83.25MHz
(07～13) 175.25MHz～211.25MHz
(14～69) 471.25MHz～801.25MHz
(02～06)
(07～13)
(14～22)
(23～36)
(37～64)
(65～94, 100～125)
(01, 96～99)
180 Channels
45.75MHz
41.25MHz (4.5MHz)
NTSC : 3.579545MHz
PAL-M : 3.57561149MHz
PAL-N : 3.58205625MHz
Rated Volta ge : 120V～240V AC, 50Hz/60Hz
Operating Voltage : 90V～260V AC, 50Hz/60Hz
115W(max.), 85W(avg.)
27” (68cm) measured diagonally, Full Square
29kV±1.3kV (at zero beam current)
2”×4-3/4” / 5×12cm Oval type×2
5W+5W
Video : 1Vp-p 75Ω (RCA pin jack)
Audio : 500mVrms (-4dBs), High Impedance (RCA pin jack)
More then 0～1550mVrms (+6dBs)
Low Impedance (400Hz when modula ted 100%) (RCA pin jack)
75Ω(VHF/UHF) Terminal, F-Type Connector
Remote Control Unit RM-C765-1A(AAA/R03/UM-4 dry battery×2)
(55.25MHz～799.25MHz)
Design & specifications are subject t o c hange without not ic e.
2
No.51731
A
SAFETY PRECAUTIONS
V-29M201
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
manuf act urer's warr an ty and will fur t h er reli ev e t h e manufactur er
of respons ibil it y f or pers onal injur y or prop ert y dam age r es ulti ng
therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident f rom visual i nspection nor can t he protect ion
afford ed by them n ecess arily be obt ained by using rep lacem ent
compon ents rated f or higher voltag e, watt ag e, etc. R epl acem ent
parts which have these special safety characteristics are
identified in the parts list of Service manual.
compon ents hav in g suc h feat ures are id entif ied by s hadin g
on the sche matics and by (
manual.
have the same safety characteristics as the recommended
replac ement par t s how n i n th e p arts lis t of S ervic e m anu al may
cause shock, fire, or other hazards.
The us e of a subst itute replacement which does not
) on the parts list in Service
!!!!
Electrical
4.
Don't short b etween the LIV E 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 th e GND is show n b y t h e LI V E : (") 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 measuri ng apparatus (os cilloscope etc .)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
If above not e wi ll not b e kept , a f use or any parts wil l 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 hig h voltage app lied t o the picture t ube must c onform wit h
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
voltag e conditions s hould b e kept to a mi nimum, or sh ould be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect inst allation, cracked or melted high voltage harn ess,
poor solderi ng, etc.). To main tain the proper min imum 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.
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 gr ound fr ame and con nectin g the oth er end of
the lead through a 10k! 2W resist or t o the an ode button .
8. W hen servic e is requir ed, obser ve the origin al lead dres s. Extr a
precaut ion shou ld be gi ven to assure c orrect lead dress in th e
high voltage circuit area. W here a short circuit has occurred,
those comp onents that in dicat e evidenc e of over heating 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
termin als , vid eo/ au dio inpu t an d output term in als , Control kn obs ,
metal cabinet, screw"heads, earph one jac k, cont rol s hafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.
(1)
Dielectric Stre ng th T est
The isol ation b etween th e AC pr imar y circuit and al l metal parts
exposed to the user, particularly any exposed metal part having a
return p ath to the chassis should withst and a voltage of 3 000V
AC (r.m.s .) for a peri od of on e s ec ond.
(. . . . W ithstand a voltag e of 1100 V AC ( r.m.s.) to an applianc e
rated up t o 120V, and 3000 V AC (r. m.s.) t o an appl iance r ated
200V or mor e, f or a peri od of on e s ec on d.)
This method of test requires a test equipment not generally found
in the service trade.
(2)
Leaka ge Current Check
Plug the AC lin e c or d dir ec tly into t h e AC ou tlet (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.) . A ny leakag e c urrent 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 lin e c or d dir ec tly into t h e AC ou tlet (do not use a line
isolati on transform er during t his check.). Use an AC voltmet er
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1 500! 10W resistor paralleled by a 0.15#F
AC-typ e capacitor betw een an expos ed 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
connect ion t o each exp os ed met al p art, p articul arl y any exp osed
metal part h avin g a return p ath to th e chassis , and meas ure th e
AC voltag e across the res istor. N ow, re vers e 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 , i n t ropic al area, this m us t not e xc eed 0.3V AC (r . m.s . ).
This corresponds to 0.2mA AC (r.m.s.).
0.15μF AC-TYPE
1500
GOOD EARTH GROUND
!
AC VOLTMETER
(HAVING 1000
OR MORE SENSITIVITY)
10W
!
/V,
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
No.51731
3
A
V-29M201
FEATURES
N ew ch assi s des ig n enabl es us e of a main b oard wi th s imp lif ied
"
circuitry.
Provided with miniature tuner (TV/CATV).
"
PLL synthesizer system TV/CATV totaling 180 channels.
"
Multifunctional remote control permits picture adjustment.
"
With AUDIO. VIDEO INPUT terminal.
"
Variable audio output terminal.
"
Adoption of the VIDEO STATUS function.
"
Adoption of the ON/OFF TIMER function.
"
With 75ΩV/U in common (F-Type) ANT Terminal.
"
SLEEP TIMER for setting in real time.
"
Wide range voltage (90V～260V) AC power input.
"
4
No.51731
A
FUNCTIONS
■
FRONT CONTROL
V-29M201
■
REMOTE CONTROL UNIT
(RM-C765-1A)
■■■■
REAR VIEW
No.51731
5
A
V-29M201
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power supply co rd.
2. R emove th e 7 s cr ews m ark ed
shown in Fig.1.
When rei nstalling t he rear cover , carefully push it inward after
*
*
**
inserting the chassis into the rear cover groove.
and 2 scr ews m ark ed
AAAA
REMOVING THE CHASSIS
After removing the rear co ver.
%%%%
1. Sli ghtly r aise th e both s ides of the ch assis b y han d and r emov e
the 2 claws under the both sides of the chassis from the front
cabinet.
2. Dr aw the chassis backwar d along the rail i n the arr ow direc tion
marked
(If necessary, take off the wire clamp , connectors etc.)
as shown in the Fig.1.
CCCC
BBBB
as
When conducting a check with power supplied, be sure to
*
*
**
confirm that the CRT earth wire is connected to the CRT
SOCKET PWB and the MAIN PWB.
REMOVING THE SPEAKER
After removing the rear cover and chassis.
%%%%
1. Remove the 2 screws marked
2. Follow the same steps when removing the other hand speaker.
as shown in Fig.1.
DDDD
CHECKING THE MAIN PW BOARD
1. To check the back sid e of th e MA IN PW Board.
1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
2) Erect th e chass is ver tic ally s o that you c an eas il y check t he
back side of the MAIN PW Board.
[CAUTION]
When erect ing the chassis, be c areful so th at there will b e no
%%%%
contacting with other PWB.
Befor e turning on pow er, m ake sur e th at th e CRT ear th wir e and
%%%%
other connectors are properly connected.
WIRE CLAMPING AND CABLE TYING
1. Be sure 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.
6
No. 51731
A
FRONT CABI.
V-29M201
CRT SOCKET PWB
(Wit hin MAIN PW B)
D
FRONT
CONTROL PWB
REAR
COVER
MAIN PWB
CLAW
D
C
CLAW
(×2)
B
(×7)
A
No. 51731
7
A
V-29M201
(CW)
MEMORY I C REPLAC EMENT
1. Memory IC
This model use a memory IC.
The memor y IC st or es dat a for proper op eration of vi d eo an d deflection c ir c ui ts .
When replacing, be sure to use an IC containing this (initial value) data.
2. Memory IC repl acement procedure
PROCEDURE SCREEN DISPLAY
(1) Power off
Switch off the power and dis connec t th e pow er c or d from the out l et.
(2) Replace the me mor y IC
.
Be sure to u se memo ry ICs written with the i nitial data values.
(3) Power on
Connect the power cord to the outlet and switch on the power.
(4) System const ant chec k and set ting
It must not adjust with ou t sign al.
%%%%
1) Si mult aneousl y press the D ISPLA Y key and VI DEO S TAT US k ey
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 t h e D IS PLAY an d VIDEO STATU S keys to dis pl a y the Fi g.2
SYSTEM CONSTANT screen.
4) Refer to the SYSTEM CONSTANT table and check the setting
items. W here th ese diff er, sel ect the s etting item wit h the M ENU
UP / DOW N key an d adjust the setting with the ME NU LEFT /
RIGHT keys. (The letters of the selected item are displayed in
yellow.)
5) Af ter adjus ting, release t he MEN U LEFT / RIG HT k ey to store t he
setting value.
6) Press the EXIT key twice to return the normal screen.
(5)
Receive chann el settin g
Refer to the OPERATING INSTRUCTIONS (USER’S GUID E) and
set the receive channel s (Channels Prese t) as described.
(6)
User setti n gs
Check the user setting items according to Table 2.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER’S GUIDE) and set the items as described.
SERVICE MENU
PICTURE SOUND
VIDEO STAT US OTHERS
LOW LIGHT HIGH LIGHT
RF AFC CHK VCO
I2C BUS CTRL
SELECT BY
OPERATE BY
Fig.1
SYSTEM CO NST ANT
GAME : YES
HYPER SCAN : YES
SURROUND : YES
CCD : YES
VIDEO : 2
SELECT BY
OPERATE BY
Fig.2
EXIT BY
EXIT
EXIT BY
EXIT
IT
IT
(7)
SERVICE MENU setting
Verify what to set in the SERVICE MENU, and set whatever is
necessary. (Fig.1) refer to the SERVICE ADJUSTMENT for setting.
8
No. 51731
A
V-29M201
TABLE 1
TABLE 2
1. Setting of FUNCTION
2. Settin g of ME NU
( System Constant Setting )
Setting item Setting content Setting value
GAME YES
HYPER SCAN YES
SURROUND YES
CCD YES
VIDEO 2
(User settin g val ue)
Setting item Setting value
MAIN POWER OFF
SUB POWER ON
CHANNEL CH 02
CHANNEL PRESET Refer to OPERATING INSTRUCTIONS
VOLUME 10
TV/VIDEO TV
DISPLAY OFF
SLEEP TIMER 0
VIDEO STATUS STANDARD
CLOSED CAPTION OFF (CC1/T1)
HYPER SURROUND OFF
TINT CENTER
COLOR CENTER
PICTURE CENTER
BRIGHT CENTER
DETAIL CENTER
BASS CENTER
TREBLE CENTER
BALANCE CENTER
MTS STEREO
TV SPEAKER ON
SET CLOCK Unnecessary to set
ON/OFF TIMER NO
CHANNEL SUMMARY Unnecessary to set
SET LOCK CODE Unnecessary to set
AUTO TUNER SETUP Unnecessary to set
TUNER MODE AIR
NOISE MUTING OFF
CLOSED CAPTION OFF (CAPTION : CC1 TEXT : T1)
LANGUAGE ENG.
YES NO
YES NO
YES NO
YES NO
210
No. 51731
9
A
V-29M201
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 reus e a chip p ar t after removi ng it.
SOLDERING IRON
!
1. Use a high insul ati on solder in g iron with a thi n p oint ed end of it.
2. A 30w soldering iron is recommended for easily removing parts.
REPLACEMEN T STEPS
!
How to remove Chip parts
1.
Resistors, capacitors, etc
####
(1) As shown in the figure, push the part with tweezers and
alternately m elt th e s older at each en d.
(2) S hif t wi th tweezers an d r em o ve the chip par t.
Transistors, diodes, variable resistors, etc
####
(1) Apply extra solder to each lead.
SOLDER
SOLDER
2. How to install Chip par ts
Resistors, capacitors, etc
####
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp th e chip part with tw eezers and pl ace it on th e sold er.
Then heat an d m elt t h e s old er at b oth en ds of th e 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
as indicated in the figure.
A
A
(2) As shown in the figure, push the part with tweezers and
alternat el y melt t he s old er at each lead . Shif t and r emov e th e
chip part.
Note : After removing the part, remove remaining solder from the
pattern.
10
No.51731
(4) Then solder leads
A
and C.
B
C
C
B
B
A
V-29M201
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION:
1. You can ma ke the n eces sary adjust me nts f or t his unit with eith er th e r emot e cont ro l unit or with the adj ustme nt equ ipmen t a nd
part s as given below.
2. Adjustm en t with th e remote con trol un it i s m ade on t h e ba sis of t h e initial settin g v al u es , howev er, the new set ti n g values which
set the screen to its optimum condition may differ from the initial settings.
3. Make sure that AC power is turned on correctly.
4. Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts which are not specified in the list for this adjustment-variable resistors, transformers, cond ensers, etc .
7. Presett i ng b ef or e ad jus tment.
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
VIDEO STATUS NORMAL
TINT, COLOR, PICTURE, BRIGHT,
DETAIL
BASS, TREBLE, BALANCE CENTER
HYPER SURROUND OFF
CENTER
ADJUSTMENT EQUIPMENT
1. DC voltm et er (or digit al voltmet er )
2. Oscilloscope
3. Signal generator ( Pattern genera tor ) [NTSC] [PAL -M] [PAL-N]
4. Remote control unit
5. TV audio multiplex signal generator
6. Frequency counter
ADJUSTMENT ITEMS
Check of B1 POWER SUPPLY
%
IF VCO adjustment
%
RF AGC adjustment
%
FOCUS adj us tment
%
DEFLECT IO N ad jus t m ent
%
V. HEIGHT, V. POSITION, V. LIN., V S CR adjustment
H. POSITION adjustment
VIDEO / CHROMA adjustment
%
WHITE BALANCE ( Low light ) adjustment
WHITE BALANCE ( High light ) adjustment
SUB BRIGHT adjustment
SUB CONTRAST adjustment
SUB COLOR adjustment
SUB TINT adjustment
MTS circuit adjustment
%
INPUT LEVEL check
STEREO VCO adjustment
SAP VCO adjustment
FILTER check
SEPARATION adjust ment
No. 51731
11
Loading...