JVC AV27D104, AV27D304, AV27430, AV27432 Service Manual
52102200303
AV-27D104 AV-27D304
AV-27430 AV-27432
SERVICE MANUAL
COLOR TELEVISION
BASIC CHASSIS
AV-27D104/RA, AV-27D104/SA,
AV-27D304
AV-27430
AV-27432
AV-27D104
AV-27D304
/RA, AV-27D304/SA,
/RA, AV-27430/SA,
/RA, AV-27432/SA
AV-27430
AV-27432
FE2
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
No.52102
2003/03
AV-27D104 AV-27D304
AV-27430 AV-27432
SPECIFICATION
Items
Dimensions (W x H x D) 75.2cm x 59.0cm x 53.1cm
(29-5/8” x 23-1/4” x 23”)
Mass 32.2kg (70.8 Ibs) 31.1kg (68.5 Ibs)
TV RF System CCIR(M)
Color Sound System NTSC, BTSC System (Multi Channel Sound)
TV Receiving Channels and Frequency
VL Band
VH Band
UHF Band
CATV Receiving Channels and Frequency
Low Band
High Band
Mid Band
Super Band
Hyper Band
Ultra Band
Sub Mid Band
TV/CATV Total Channel 180 Channels
Intermediate Frequency
Video IF Carrier
Sound IF Carrier
Color Sub Carrier 3.58MHz
Power Input 120V AC, 60Hz
Power Consumption 105W
Picture Tube 27” (68cm) Measured diagonally H: 55.4cm x V: 41.8cm
High Voltage 28kV±1.3kV (at zero beam current)
Speaker 5 x 9cm (2” x 3-1/2”) Oval type x 2
Audio Power Output 1.2W + 1.2W
Video / Audio Input (1 / 2 / 3)
Video (1 / 3)
Audio (1 / 2 / 3)
S-Video (Input 1)
Component (Input 2)
Audio Output (Variable) More then 0~1550mVrms (+4dBs)
Antenna terminal (VHF/UHF) F-type connector, 75ohm
Remote Control Unit RM-C1253G [AV-27D304]
02ch~06ch : 54MHz~88MHz
07ch~13ch : 174MHz~216MHz
14ch~69ch : 470MHz~806MHz
54MHz~804MHz
02~06, A-8 by 02~06&01
07~13 by 07~13
A~1 by 14~22
J~W by 23~36
W+1~W+28 by 37~64
W+29~W+84 by 65~125
A8, A4~A1 by 01, 96~99
45.75MHz
41.25MHz (4.5MHz)
1V(p-p), 75ohm (RCA pin jack x 2)
500mV(rms) (-4dBs), high impedance (RCA pin jack x 8)
Mini DIN 4pin x 1
Y : 1V(p-p) positive (negative sync provided, when terminated with 75ohm)
C : 0.286V(p-p) (burst signal when terminated with 75ohm)
RCA pin jack x 3
Y : 1V(p-p) positive (negative sync provided, when terminated with 75ohm)
Pb/Pr : 0.7V(p-p) 75ohm
Low impedance (400Hz when modulated 100%) (RCA pin jack)
RM-C1255G [AV-27D104]
(AA battery x 2 or Lithium cell battery x 1)
AV-27D104 / AV-27D304 AV-27430 / AV-27432
Contents
65.4cm x 59.3cm x 49.4cm
(25-3/4” x 23-3/8” x 19-1/2”)
RM-C203
(AA battery x 2 or Lithium cell battery x 1)
Design & specifications are subject to change without notice.
1-2 (No.52102)
SECTION 1
PRECAUTIONS
AV-27D104 AV-27D304
AV-27430 AV-27432
1.1 SAFETY PRECAUTIONS
(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. Replacem ent 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 pr oducts 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 that 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 schematic s and by ( ) 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 pa rts list of Service manual ma y cause
shock, fire, or other hazards.
(4) Use isolation transformer when hot chassis.
The chassis and any sub-chassis contained in some products ar e
connected to one side of the AC power line. An isolation transformer
of adequate capacity 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.
(5) 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 : ( ) side GND, the
ISOLATED(NEUTRAL) : ( ) side GND and EARTH : ( ) side GND.
Don't short between the LIVE side GND and I SOLATED (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.
(6) The high voltage applied to the picture tube m ust 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 con ditions 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 manufact urer of the
complete product.
(7) If any repair has been made to the ch assis, it is recomme nded that
the B1 setting should be checked or adjusted (See ADJUSTMENT
OF B1 POWER SUPPLY).
(8) 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
10kΩ 2W resistor to the anode button.
(9) When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the hig h
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.
(10) 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, screwheads, earphone jack,
control shafts, etc.) to be sure the pro duct is saf e to operat e with out
danger of electrical shock.
a) 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 1100V 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 test equipment not generally
found in the service trade.
b) 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 A C ou tle t ( 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 1500ohm 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, 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 exce ed 0.3V AC
(r.m.s.). This corresponds to 0 .2mA AC (r .m.s .).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
0.15 F AC-TYPE
PLACE THIS PROBE
GOOD EARTH GROUND
1500 10W
ON EACH EXPOSED
METAL PART
(11) High voltage hold down circuit ch eck.
After repair of the high voltage hold down circui t, this circuit shall b e
checked to operate correctly.
See item "How to check the high voltage hold down circuit".
This mark shows a fast
operating fuse, the
letters indicated below
show the rating.
A V
POWER CORD
REPLACEMENT WARNING.
Connecting the white line side of power
cord to "WHT" character side.
PWB
White line side
WHT
PW
(No.52102)1-3
AV-27D104 AV-27D304
AV-27430 AV-27432
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
Function AV-27D104 AV-27D304 AV-27430 AV-27432 Description
Tele-Text
(Closed-Caption)
Digital Comb Filter used used used used By the three-line digital comb filter, the refreshed image can be seen.
Video Status
(THEATER)
Video Status
(SPORTS)
GAME button
Component input
BBE
V-CHIP
Hyper-Surround
MTS Stereo
Return Plus
used used used used
used used - -
- - used used
used - used used
used used used used
-used- used used used used
used used - used used used used
used used used used
Title TELE-TEXT broadcast of C1~C4 and T1~T4 formula is receivable.
Expression of a favorite screen can be chosen by the VIDEO STATUS
function (STANDARD-DYNAMIC-THEATER-GAME).
Expression of a favorite screen can be chosen by the VIDEO STATUS
function (STANDARD-DYNAMIC-SPORTS-GAME).
Sets automatically the proper conditions for playing video game (previously
connected in the front input).
Since the component signal input terminal is equipped, it reappears direct
without deteriorating the signal from DVD.
BBE high definition audio adds natural, clear and extraordinary sound
quality to any program.
Since the V chip is built in, it can choose, view and listen to a healthy
program.
Creates a deep, three-dimensional sound effect by channeling the audio
through the TV's front-firing speakers.
The voice multiplex function of the MTS system is built in.
(MTS = Multi channel TV Sound system)
You program a specific channel to return to while scanning through the
channels using the CH+ and CH buttons.
2.2 MAIN DIFFERENCE LIST
• The difference between AV-27D104/AV-27D304 series models and AV-27430/AV-27432 series models are mainly in the CABINET.
• The difference between RA models and SA models is in the PICTURE TUBE. As the result of the difference in PICTURE TUBE, the
MAIN PWB also differ.
• The difference between AV-27D104 series models and AV-27D304 series models are in the CABINET color.
• The difference between AV-27430 series models and AV-27432 series models are in the CABINET color.
Part name AV-27D104 /RA AV-27D104 /SA AV-27D304 /RA AV-27D304 /SA
MAIN PWB SFE-1026A-M2 SFE-1025A-M2 SFE-1022A-M2 SFE-1021A-M2
PICTURE TUBE (ITC) A68ADT25X01 A68QDN891X001 A68ADT25X01 A68QDN891X001
FRONT CABINET GQ10018-003A-A GQ10018-003A-A GQ10018-001B-A GQ10018-001B-A
REAR COVER GQ10017-001B-A GQ10017-001B-A GQ10017-001B-A GQ10017-001B-A
REMOTE CONTROL UNIT RM-C1255G-1H RM-C1255G-1H RM-C1253G-1H RM-C1253G-1H
Part name AV-27430 /RA AV-27430 /SA AV-27432 /RA AV-27432 /SA
MAIN PWB SFE-1028A-M2 SFE-1027A-M2 SFE-1030A-M2 SFE-1029A-M2
PICTURE TUBE (ITC) A68ADT25X01 A68QDN891X001 A68ADT25X01 A68QDN891X001
FRONT CABINET LC10081-004B-A LC10081-004B-A LC10081-008A-A LC10081-008A-A
REAR COVER LC10082-005A-A LC10082-005A-A LC10082-003A-A LC10082-003A-A
REMOTE CONTROL UNIT RM-C203-1C RM-C203-1C RM-C1255G-1H RM-C1255G-1H
2.3 HOW TO IDENTIFY MODELS
How to recognize from the appearance of the model concerned
is written right figure. Please distinguish from several contents on
Indicated model name
the printing label.
1-4 (No.52102)
Indicated RA or SA models
2.4 FUNCTIONS
[FRONT PANEL]
<AV-27D104 / AV-27D304>
AV-27D104 AV-27D304
AV-27430 AV-27432
<AV-27430 / AV-27432>
MENU CHANNEL
[REAR PANEL]
<AV-27D104 / AV-27D304>
MENU POWER
CHANNEL
VOLUME
VOLUME
POWER
<AV-27430 / AV-27432>
[REMOTE CONTROL UNIT]
AV-27D104 (RM-C1255G) AV-27D304 (RM-C1253G)
AV-27430 / AV-27432 (RM-C203)
(No.52102)1-5
AV-27D104 AV-27D304
AV-27430 AV-27432
2.5 DISASSEMBLY PROCEDURE
2.5.1 REMOVING THE REAR COVER
[AV-27D104 / AV-27D304]
(1) Unplug the power plug.
(2) Remove the 11 screws [A] (Fig.1).
(3) Remove the 4 screws [B] (Fig.1).
(4) Then remove the REAR COVER toward you.
2.5.2 REMOVING THE REAR COVER
[AV-27430 / AV-27432]
(1) Unplug the power plug.
(2) Remove the 7 screws [A] (Fig.2).
(3) Remove the 4 screws [B] (Fig.2).
(4) Then remove the REAR COVER toward you.
2.5.3 REMOVING THE MAIN PWB
• Remove the REAR COVER.
(1) Raise this side of the MAIN PWB, and remove the PWB
STOPPER [C] from the cabinet.
(2) Withdraw the MAIN PWB backward. (If necessary, remove
the wire clamp, connectors etc.)
2.5.4 REMOVING THE SPEAKER
[AV-27D104 / AV-27D304]
• Remove the REAR COVER.
(1) Remove the 4 screws [D], then remove the speaker
(Fig.1).
(2) Follow the same steps when remove the other hand
speaker.
2.5.6 CHECKING THE PW BOARD
(1) Pull out the MAIN PWB (refer to REMOVING THE MAIN
PWB).
(2) Erect the MAIN PWB vertically so that you can easily check
the backside of the PW Board.
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 wire connector
is properly connected.
• When conducting a check with power supplied, be sure to
confirm that the CRT EARTH WIRE (BRAIDED ASS'Y) is
connected to the CRT SOCKET PW board.
2.5.7 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.
2.5.5 REMOVING THE SPEAKER
[AV-27430 / AV-27432]
• Remove the REAR COVER.
(1) Remove the 2 screws [D], then remove the speaker
(Fig.2).
(2) Follow the same steps when remove the other hand
speaker.
NOTE:
When removing the 2 screws [D] of the speaker, remove the
lower side screw first, and then remove the upper one.
1-6 (No.52102)
[AV-27D104 / AV-27D304]
FRONT CABINET
AV-27D104 AV-27D304
AV-27430 AV-27432
CRT
SPEAKER
D
CRT SOCKET PWB
(Within MAIN PWB)
HVT
SPEAKER
REAR COVER
D
(PWB STOPPER)
TUNER
MAIN PWB
C
POWER CORD
Fig.1
B
A
(No.52102)1-7
AV-27D104 AV-27D304
AV-27430 AV-27432
[AV-27430/ AV-27432]
FRONT CABINET
CRT
CRT SOCKET PWB
(Within MAIN PWB)
SPEAKER
REAR COVER
D
MAIN PWB
HVT
TUNER
D
(PWB STOPPER)
C
1-8 (No.52102)
POWER CORD
B
A
Fig.2
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