JVC HV-34LZ, HV-34LZ/-A, HV-34LZ/EE, HV-34LZ/HK Service Manual
SERVICE MANUAL
COLOUR TELEVISION
HV-34LZ
BASIC CHASSIS
HV-34LZ
HV-34LZ
HV-34LZ
HV-34LZ
MF
/HK
/-A
/EE
[RM-C1030]
HV-34LZ
HV-34LZ
HV-34LZ /EE
[RM-C1031]
HV-34LZ
/-A
/HK
CONTENTS
SPECIFICATIONS ････････････････････
!
SAFETY PRECAUTIONS ･･････････････
!
MAIN DIFFERENCE LIST ･･････････････
!
FEATURES･･････････････････････････
!
FUNCTIONS ･････････････････････････
!
1
･･････････････････････････ 4
････････････････････････････････････････････････････
････････････････････ 2
････････････････････････････････････････
･･････････････ 3
････････････････････････････
･･････････････ 4
････････････････････････････
･････････････････････････ 6
･･････････････････････････････････････････････････
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
SPECIFIC SERVICE INSTRUCTIONS････
!
SERVICE ADJUSTMENTS････････････
!
PARTS LIST ･･･････････････････････
!
★ OPERATING INSTRUCTIONS
★ STANDARD CIRCUIT DIAGRAM･･･････
･･･････････････････････ 37
･･････････････････････････････････････････････
････････････15
････････････････････････
････ 8
････････
･･･････ 2-1
･･････････････
No.52020
Sep. 2002
HV-34LZ
SPECIFICATIONS
Item Content
Dimensions ( W××××H××××D ) 89.8cm×72.8cm×57.9cm
Mass 68.0kg
TV RF System B/G, I, D/K, K1, M
Colour System PAL / SECAM / NTSC 3.58 / NTSC 4.43
Stereo System
Teletext System
VL
Receiving
Frequency
Intermediate
Frequency
Colour Sub Carrier
Frequency
Power Input
Power Consumption Max 215W / Avg. 153W
Aerial Input Term
Picture Tube 34”(87cm) measured diagonally
High Voltage 32.0kV (At zero beam current )
Audio Power Output 7W + 7W
Speaker
Input
Terminal
Output
Terminal Audio(L/R) 500mV(r ms) (-4dBs), Low Impedance
AV Compulink
Headphone jack
Remote Control Unit
VH
UHF
CATV
VIF 38.0MHz
SIF 32.5MHz(5.5MHz) / 32.0MHz(6.0MHz) / 3.15MHz(6.5MHz) / 33.5MHz ( 4.5MHz)
PAL 4.43MHz
SECAM 4.40625MHz / 4.25MHz
NTSC 3.58MHz / 4.43MHz
Video
Audio(L/R) 500mV(r ms) (-4dBs), High Impedance
S / Video
Component Cb/Cr
Video 1V(p-p) 75Ω
A2 (B/G) / NICAM (B/G, I, D/K)
Fastext (UK system) **** [ **** Without TEXT mode : HV-34LZ
WST(world standard text)
46.25MH z ～ 168.25MHz
175.25MHz ～ 463.25MHz
471.25MHz ～ 863.25MHz
Mid (X～Z+2, S1～S10), Super (S11～S20) & Hyper (S21～S41)
AC 110V～240V , 50/60Hz
75Ωunbalanced, C oaxial
+1.0kV
-1.5kV
5×12cm Oval type×2
1Vp-p 75Ω
Y : 1V(p-p) Positive (N egative sync provided) 75Ω
C : 0.286V(p-p) (burst signal), 75Ω
Y : 1V(p-p), 75Ω
Cb : B-Y 0.7V(p- p), 75Ω / Cr : R-Y 0.7V(p-p), 75Ω
Mono mini jack (φ3.5mm )
Stereo mini jack (φ3.5mm )
RM-C1030 (AA/R06 / UM-3 , Dry cell battery×2) : HV-34LZ / HV-34LZ
RM-C1031 (AA/R06 / UM-3 , Dry cell battery×2) : HV-34LZ
/HK
/-A
/ HV-34LZ
/HK ]
/EE
Design & specifications are subject to change without notice
2
No.52020
.
SAFETY PRECAUTIONS
HV-34LZ
1. The design of this product cont ains 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 identic al 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 injur y or property damage resulting
theref rom.
3. Many electric al and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor c an 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 (!!!!) 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 ISOLATED
(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 (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 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 det ermine the caus e by visual inspection
(incorrect installation, cr acked 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 manuf acturer 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 ground frame and connecting the other end of
the lead through a 10kΩ 2W resistor to the anode button.
8. When service is required, obser ve the original lead dress. Extra
precaution should be given to assure correct lead dress in the
high voltage circuit area. W here a short circuit has occurr ed,
those components that indicate evidenc e of overheating should
be replaced. Always us e the manufactur er's replacement
components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perf orm an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs,
metal c abinet, screwheads, earphone jack, c ontrol shafts, etc.)
to be sure the product is safe to operate without danger of
electr ic al sh oc k.
(1) Dielectr ic Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any expos ed 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 1100V AC (r.m.s.) to an applianc e
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 gener ally found
in the s ervice trade.
(2) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer dur ing this check.). Using a " Leakage
Current T ester", 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 c urrent must not exceed
0.5mA AC (r.m.s.).
However, in tr opical 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 1500Ω 10W resistor paralleled by a 0.15µF
AC-type capacitor between 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
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 meas ured
must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA
AC (r.m.s.).
However, in tr opical area, this must not exc eed 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.52020
3
HV-34LZ
WST
MAIN DIFFERENCE LIST
!!!!
Part name
MICOM PWB SMF-0M701A SMF-0M702A SMF-0M703A SMF-0M704A
!
POWER CORD
JVC MARK LC41037- 001A LC41037- 003A LC41037-001A
!
REAR COVER LC10180- 003A-HH LC10180- 005A-H LC10180-003A-HH
!
INST BOOK LCT1200-001A-H LCT1201- 001A-H LCT1200-001A-H LCT1202-001A-H
REMOTE CONTROL UNIT RM-C1030-1H RM-C1031-2H RM-C1030-1H
!
DIGEST MANUAL ××LCT1203- 001A-H ×
!
CONVERSION PLUG ××QAM0055-001 ×
WARRANTY CARD ×××BT-54012-2
TELETEXT
Model name
FASTEXT
HV-34LZ HV-34LZ
QMP40D0-200J5
or
QMP40D0-200J3
○×○○
QMPN050-200-E2
/HK
HV-34LZ
QMPR010-200-E2
QMPR010-200-K2
/-A
or
HV-34LZ
QMP40D0-200J5
/EE
FEATURES
" New chassis design enable us e of an interactive on screen
control.
" The TELETEXT SYSTEM has a built-in FASTEXT (UK system),
and WST (world standard text system).
**** Except HV-34LZ
" Pure FLAT CRT reproduce fine textured.
" Digi Pure pro : Auto digi pure with motion picture compensation.
" Because this TV unit corresponds to multiplex br oadcast, users
can enjoy music progr ams and sporting events with live realism.
In addition, BILINGUAL programs can be heard in their original
language.
/HK
.
" Built-in ECO (ECONOMY, ECOLOGY) MODE.
In accordance with the brightness in a r oom, the brightness
and/or contr ast of the picture can be adjusted automatic ally to
make the optimum pict ure which is easy on the eye.
4
No. 52020
SYSTEM BLOCK DIAGRAM
MICON PWB
HV-34LZ
IC004
MEMORY
MAIN PWB
IC661
3D SURROUND
/ VOL / TONE
IC101
MULTI SOUND
PROCESSOR
SDA 0
SCL
MICRO COMPUTER
0
SDA 2
SCL 2
IC001
SDA 1
SCL
1
IC301
DEF & RGB
PROCESSOR
TU001
TUNER
IC101
SW
100Hz PWBAV SW PWB
IC101
VIDEO PROCESS
&
CODEC
IC201
SAMPLE RATE
CONVERTER
IC301
ENHANCE
No. 52020
5
HV-34LZ
FUNCTIONS
■■■■ Front Terminal & Control
1 HEADPHONE jack 7 SENSOR(Remote Control & ECO)
2 VIDEO-4 terminal (S-VIDEO / VIDEO / L/MONO / R) 8 CINEMA SURROUND LAMP
3 MENU/OK Button 9 ECO LAMP
4 CHANNEL -/+ (MENU UP/DOWN) Button A POWER LAMP
5 VOLUME -/+ (MENU LEFT/RIGHT) Button B POWER SW Button
6 TV/VIDEO / EXIT Button
■■■■ Rear Terminal
1 VIDEO-1 (INPUT) terminal (S, V, L, R)
2 VIDEO-2 (INPUT) terminal (V, L, R)
3 VIDEO-3 (INPUT) terminal (V/Y, Cb, Cr, L, R)
/ COMPONENT
4 OUTPUT (AUDIO/VIDEO) terminal (V, L, R)
5 AV COMPULINK terminal
6 AERIAL socket
6
No. 52020
■■■■ Remote Control Unit
HV-34LZ
RM-C1030 : HV-34LZ, HV-34LZ
2
5
6
7
9
10
11
12
16
17
/-A
,HV-34LZ
13
14
15
18
19
20
/EE
1 POWER Key
2 MUTING Key
1
3
4
8
3 ZOOM Key
4 CINEMA SURROUND Key
5 COLOUR SYSTEM Key
6 SOUND SYSTEM Key
7 DISPLAY Key
8 MENU / OK Key
9 FUNCTION Key ( ▲/▼ & / Key )
A STEREO Ⅰ/ⅡKey
: Stereo / : Mono
Ⅰ : Bilingual (subⅠ)
Ⅱ : Bilingual (subⅡ)
B TV/VIDEO Key
C PICTURE MODE Key
D TV/TEXT Key
E CHANNEL Key
F -/-- Key
G RETURN + Key
H CHANNEL +/- Key
I VOLUME +/- Key
J COLOUR Key
K TELETEXT Key
RM-C1031 : HV-34LZ
2
5
6
7
9
10
11
12
16
17
/HK
14
15
18
19
1 POWER Key
2 MUTING Key
1
3
4
8
3 ZOOM Key
4 CINEMA SURROUND Key
5 COLOUR SYSTEM Key
6 SOUND SYSTEM Key
7 DISPLAY Key
8 MENU / OK Key
9 FUNCTION Key ( ▲/▼ & / Key )
A STEREO Ⅰ/ⅡKey
: Stereo / : Mono
Ⅰ : Bilingual (subⅠ)
Ⅱ : Bilingual (subⅡ)
B TV/VIDEO Key
C PICTURE MODE Key
E CHANNEL Key
F -/-- Key
G RETURN + Key
H CHANNEL +/- Key
I VOLUME +/- Key
J COLOUR Key
No. 52020
7
HV-34LZ
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power cord.
2. Remove the 18 screws marked !!!! as shown in the Fig. 1.
3. Withdraw the rear cover toward you.
REMOVING THE AV TERMINAL BOARD
" After removing the rear cover.
1. Remove the 5 screws mar ked """" as shown in the Fig. 1.
2. Withdraw the AV terminal board toward you.
REMOVING THE CHASSIS
" After removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and remove
the 2 claws under the both sides of the chassis from the front
cabinet.
2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER
" After removing the rear cover.
1. Remove the 2 screws marked ####, and remove the speaker
holder as shown in Fig. 1.
NOTE : When removing the screws marked #### of the speaker
holder remove the lower side screw first, and then remove
the upper one.
2. Remove the 4 screws $$$$ attaching the speaker.
3. Follow the same steps when removing the other hand speaker.
CHECKING THE PW BOARD
To check the back side of the PW Board.
1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
2) Erect the chassis vertic ally s o that you can easily check the
back side of the PW Board.
[CAUTION]
" When erecting the chassis, be careful so that there will be no
contac ting with other PW Boar d.
" 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.
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.
8
No.52020
HV-34LZ
SPEAKER
HOLDER
REAR COVER
FRONT CABINET
SPEAKER
C
(×2)
CONTROL
BASE
D
(×4)
FRONT
CONTROL
PWB (R)
MAIN PWB
CRT SOCKET
PWB
CONTROL
BASE
CLAW
FRONT CONTROL
PWB (L)
MICOM
PWB
AV SW PWB
SPEAKER
HOLDER
SPEAKER
CLAW
BLK PW B
100Hz PWB
C
(×2)
D
(×4)
POWER & DEF.
PWB
AV TERMINAL
BOARD
CHASSIS
B
(×5)
Fig. 1
No.52020
POWER CORD
(×18)
A
9
HV-34LZ
A
REMOVING THE CRT
∗ R eplacement of the CRT should be performed by 2 or more
persons.
• After removing the cover, chassis etc.,
1. Putting the CRT change table on s oft cloth, the CRT change table
should also be c overed with such soft cloth (shown in Fig.3).
2. W hile keeping the surface of CRT down, mount the TV set on the
CRT change table balanc ed will as shown in Fig.4.
3. Remove 4 screws marked by arrows with a box type screw driver
as shown in Fig.4.
• Since the c abinet will drop when screws have been removed, be
sure to support the cabinet with hands.
4. After 4 screws have been removed, put the cabinet slowly on
cloth (At this time, be carefully so as not to damage the front
surface of the c abinet) shown in Fig.5.
• The CRT should be assembled acc ording to the opposite
sequence of its dismounting steps.
∗ The CRT change table should preferably be smaller that the CRT
surface, and its height be about 35c m. (Fig.3)
∗ About CRT Spacer (Fig.4)
An appropriate CRT spacer should be used in the corresponding
CRT in accordance with the type of the CRT.
When a CRT is replaced, special attention should be paid to this
matter.
CRT CHANGE TABLE
CLOTH
Fig. 3
PPROX.
35cm
COATING OF SILICON GREASE FOR ELECTRICAL
INSULATION ON THE CRT ANODE CAP SECTION.
• Subsequent to replacement of the CRT and HV transformer or
repair of the anode cap, etc. by dismounting them, be sure to
coat silicon grease for electric al insulation as shown in Fig.6.
Wipe around the anode button with clean and dry cloth. (Fig.6)
Coat silicon grease on the section around the anode button. At
this time, take care s o that any silic on greases dose not stick to
the anode button. (Fig.7)
★★★★ Silicon grease product No. KS - 650N
CRT
Anode button
Silicon grease
coating
CABINET
Approx.
20mm (Do not
coat greas e on
this section
Anode button
(N o stic king of
silicon gr ease)
Fig. 4
CRT
CRT
CHANGE TABLE
Fig. 5
Silicon grease
should be coated
by 5mm or more
from the outside
diameter of
anode cap.
Coating position
of silicon grease
Anode c ap
Fig. 6 Fig. 7
10
No. 52020
REPLACEMENT OF MEMORY ICs
1. Memory ICs
This TV use memory ICs. In the memory ICs, there are memorized data
for correctly operating the video and deflection circuits. When replacing
memory ICs, be sure to use ICs written with the initial values of data.
HV-34LZ
2. Procedure for replacing memory ICs
(1) Power off
Switch the power off and unplug the power cord fr om the wall outlet.
(2) Replace ICs.
Be sure to use memory ICs written with the initial data values.
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. WB PRESET 8. SHIPPING(OFF)
9. BUS FREE
1-9 : SELECT DISP : EXIT
SERVICE MENU
(3) Power on
Plug the power cord into the wall outlet and switch the power on.
Fig.1
(4) Check and set SYSTEM CONSTANT SET:
****
It must not adjust without signal.
1) Pr ess the DISPLAY key and the PICTURE TUBE key of the REMOTE CONTROL UNIT simultaneously.
2) The SERV ICE MENU screen of Fig. 1 will be displayed.
3) While the SERVICE MENU is displayed, press the DISPLAY key and PICTURE TUBE key simultaneously, and the SYSTEM
CONSTANT SET screen of Fig. 2 will be displayed.
4) Check the setting values of the SYSTEM CONSTANT SET of Table 1. If the value is different, select the setting item with the
FUNCTION ▲/▼ key, and set the c orrect value with the FUNCTION / key.
5) Pr ess the MENU(OK) key to memorize the setting value.
6) Press the IN FORMATION key, and return to the normal screen.
SYSTEM CONSTANT SET
1. TEXT **
SERVICE MENU KEY
OK
+ : STORE DISP : EXIT
Fig.2
2. BLUE BACK MENU
3. E.M.C
4. WHITE BACK
5. COLOUR AUTO
6. PICTURE TILT
**
**
**
**
**
(5) Setting of receive channels
Set the r eceive c hannel.
For setting, refer to the OPERATING INSTRUCTIONS.
(6) Setting of SERVICE MENU
Verify the setting items of the SERVICE MENU of T able 2, and
reset where necessary.
For setting, refer to the SERVICE ADJUSTMENTS.
(7) User settings
Check the user setting values of Table 3, and if setting value is
different , set the corr ect value.
For setting, refer to the OPERATING INSTRUCTIONS.
SERVICE
MENU /
& SYSTEM
CONSTANT
key
ZOOM
(ASPECT )
key
FUNCTION key
(▲/▼ & / key)
MENU / OK key
MEMORY
(STORE) key
SETTING ITEM
SELECT key
(Numbers key)
No. 52020
11
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