JVC AV-29SX1 EK Schematic
1JVC AV-29SX1 EK
General Information
JA Chassis
Specifications
Dimensions (W x H x D).............................................................. 73.3cm x 58.3cm x 49.2cm
Mass ............................................................................................................................... 39.7 kg
TV RF System .............................................................................................................. CCIR (I)
Colour System .................................................................... PAL / NTSC (only in EXT mode)
Stereo System................................................................................................................NICAM
Teletext System .............. FASTEXT (United Kingdom system) / WST (Standard System)
Receiving Channels and Frequency UHF ......................... E21 - E69 ....470MHz - 862MHz
Intermediate Frequency......................................................................... VIF Carrier 39.5MHz
.................................................................................................. SIF Carrier 33.5MHz (6.0MHz)
Colour Sub Carrier Frequency.......................................................................... PAL 4.43MHz
......................................................................................................... NTSC 3.58MHz / 4.43MHz
Aerial Input Terminal..................................................................... 75Ω Unbalanced, Coaxial
Power Input .................................................................................. 230V (220~240V) AC, 50Hz
Power Consumption .................................................................... 116W (Avg.) / 172W (Max.)
Picture Tube................................................ 29" (Visible size: 68cm) Diagonally measured
Viewable Picture Size (W) x (H) ..................................................................56.0cm x 42.2cm
High Voltage......................................................... 31.0kV +1V -1.5V (at zero beam current)
Speaker.................................................................................... (10cm +2cm) x2, Round Type
Audio Output.......................................................................................................... 10W + 10W
External INPUT/OUTPUT
EXT - 1/EXT -2 ............................................................ 21-pin Euroconnector (Scart socket)
EXT - 3 (INPUT) .................................................................. Video: 1 Vp-p 75( (RCA pin jack)
...................................... Audio (L/R) :500mVrms (-4dBs), High Impedance (RCA pin jack)
Audio Output (variable) ............................................ Centre Front L/R, Surround Rear L/R
..............................................................................................0~1,000mVrms, Low Impedance
Headphone Jack ......................................................................... Stereo mini jack (ø 3.5mm)
Remote Control Unit ..............................................RM-C770 [Battery size ; AAA (R03) x 2]
Recommended Safety Parts
Item Part No. Description
1 A68ESF002X11 Picture Tube (ITC) V01 (Inc. DY, Wed & PC)
2 CELD020-004J7 Degaussing Coil L01
5 AEEMP003-185 Power Cord
7 CM12263-A01-H Rear Cover
9 CM22875-003-E Rating Lable
11 CETH008-00AJ1 HVT (Service) T1551
100 CM12661-00A-H Front Cabi. Assy Inc. No. 101 - 108
R1585 QRV141F-2201AY MF R 2.2k Ohms 1/4W
R1586 QRV141F-1582AY MF R 15.8k Ohms 1/4W
R1991 QRZ0057-825 C R 8.2M Ohms 1W
C1521 QFZ0117-4501L MPP CAP. 4500p F 1.5kVH ± 2.5%
C1522 QFZ0117-9501L MPP CAP. 9500p F 1.5kVH ± 2.5%
C1524 QFZ0119-514S MPP CAP. 0.51 µ F 200V ± 3%
C1528 QFZ0119-684S MPP CAP. 0.68 µ F 200V ± 2.5%
C1905, C1906, C1907 QCZ9034-472A C CAP. 4700p F 400V
C1992 QCZ9041-471A C CAP. 470p FAC 400V
C1993 QCZ9041-332A C CAP. 3300p FAC 400V
T1551 CETH008-00AJ1 HVT (Service)
T1901 CETS024-001J7 SW Transf
L1551 CELC901-076J6 Heater Choke
D1901 D3SBA60 Diode Bridge
Q1521 BU2508AX Power Transistor H. Out
IC1902 TLP621 (D4) - LF2 Photo Coupler
FR1406 QRH127J-1R5M F R 1.5 Ohms 1/2W
FR1551 QRH127J-100M F R 10 Ohms 1/2W
FR1552 QRH027K-R82M F R 0.82 Ohms 2W
FR1553 QRH127J-5R6M F R 5.6 Ohms 1/2W
FR1554 QRZ0054-4R7M F R 4.7 Ohms 1/4W
FR1555 QRH027J-1R8M F R 1.8 Ohms 2W
FR1556 QRX029J-1R0 MF R 1 Ohms 2W
FR1958 QRH027J-1R5M F R 1.5 Ohms 2W
SK3001 CE42535-001J1 CRT Socket
C8901 QFZ9040-474N MF CAP. 0.47µF AC 275V
C8904 QFZ9040-473N MF CAP. 0.047µF AC 275V
F8901 QMF51D2-3R15J1 Fuse T 3.15AH
LF8901 CE42144-001J2 Line Filter
S8901 QSP4K21-C01 Push Switch Main Power
TH8901 CEKP010-001J2 W-PTC
R0403, R0509 QRZ0054-470M F R 47 Ohms 1/4W
R0504 QRZ0054-330M F R 33 Ohms1/4W
Service Adjustments
Replacement of Memory
ICs
1. Memory IC
This TV uses a non-volatile memory IC
(EEP-ROM IC). In the memory IC are memorised data for correctly operating the video and
deflection circuits. When replacing it, be sure to
use a memory IC containing the initial values,
(not a blank one).
2. Procedure for Replacing Memory ICs
1) Power off
Switch the power off and unplug the power
cord from the outlet.
2) Replacing the memory IC
Replace with new memory IC containing the
initial values.
3) Power on
Plug the power cord into the outlet and switch
the power on.
4) Check and Set System Constant Set
1: Press the Display key and the Cinema/Game
key of the Remote Control Unit simultaneously.
2: The Service Menu screen shown in fig. 1 will
be displayed.
3: While the Service Menu is displayed, press
the Display key and Cinema/Game key
simultaneously and the System Constant Set
screen shown in fig. 2 will be displayed.
4: Check the setting value of the System
Constant Set shown in table 1. If the value is
different, select the setting item with the
Function Up/Down key, and set the correct
value with the Function -/+ key.
5:Press the Video/Sound key and memorise the
setting value.
6:Press the Display key twice and return to the
normal screen.
SERVICE MENU
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRTESET
1-5: SELECT : EXIT
Fig. 1
SYSTEM CONSTANT SET
SYSTEM CONSTANT SET
MODEL = JA-29 (V*,****)
1. COUNTRY : UK
2.INCH : 25/28/29
- = : STORE : EXIT
Fig. 2
5) Setting of Receive Channels
Set the receive channel (Channel Pre-set).
(For Auto Programme). For setting refer to the
Operating Instructions.
6) User Setting
Check the user setting value of Table 2, if
setting value is different set the correct value.
For setting refer to the Operating Instructions.
7) Setting the Service Menu
Verify the setting items of the Service Menu of
Table 3 and reset where necessary. For
setting refer to the Service Adjustments.
Fig. 3
Setting Item Setting Content Setting Value
Country UK
Inch 25/ 28/ 29
Table 1
Fig. 4 SUB MENU SCREEN
User Setting Values
Setting Item Setting Value
SUB POWER ON
CHANNEL 1 POSITION
CHANNEL PRESET Setting completed in 2.(5)
setting of receive channel
VOLUME Appropriate sound volume
TV/TEXT TV
DISPLAY POSITION DISPLAY
P/N TV: PAL
CINEMA/GAME USER
SLEEP TIMER 0
SPATIAL EFFECT OFF
16:9/4:3 4:3
ECO OFF
BALANCE CENTRE
LANGUAGE ENGLISH
Table 2
Service Menu Setting Items
Service Menu Setting Items
1. IF 1. VCO
2. DELAY POINT
2. V/C 1. CUT OFF
2. R DRIVE
3. G DRIVE
4. B DRIVE (Do not adjust)
5. BRIGHT
6. CONT.
7. COLOUR (PAL / N3)
8. TINT (NTSC)
3. AUDIO 1. CONC LIMIT (Do not adjust)
2. A2 ID THR (Do not adjust)
4. DEF. 1. V-SLOPE
2. V-SHIFT
3. V-SIZE
4. H-CENT
5. H-SIZE
6. EW-PIN
7. TRAPEZ
8. V-S.CR
9. EW-COR
VSM PRESET 1. BRIGHT
2. CONT.
3. COLOUR
4. SHARP
5. TINT
6. R DRIVE
7. G. DRIVE
8. B DRIVE
9. BASS
10. TREBLE
Table 3
Basic Operation of Service Menu
1. Tool of Service Menu Operation
Operate the Service Menu with the Remote
Control Unit.
2. Service Menu Items
With the SERVICE MENU, various settings
(adjustments) can be made, and they are
broadly classified in the following 5 items of
Settings (adjustments):
1] IF: for entering/ adjusting the setting values
(adjustment values) of the IF circuit.
2] V/C: for entering/ adjusting the setting values
(adjustment values) of the VIDEO/CHROMA
circuit.
3] Audio: for entering/adjusting the setting
values (adjustment values) of the multiplicity
SOUND circuit.
4] DEF: for entering/adjusting the setting values
(adjustment values) of the DEFLECTION
circuit.
5] VSM Pre-set: for setting the values of
STANDARD, USER, CINEMA and GAME.
(VSM: Video Status Memory).
3. Basic Operation of Service Menu
1) How to enter Service Menu
Press the Display key and the Cinema/Game
key of the remote control unit simultaneously.
The SERVICE MENU screen of Fig. 1 will be
displayed.
2) Selection of Sub Menu Screen
1] Press one of the keys 1 - 5 of the remote
control unit and select the Sub Menu Screen
(see fig. 2) from the Service Menu.
Service Menu --> Sub Menu 1: IF
2: V/C
3: Audio
4: DEF.
5: VSM Pre-set
3) Method of Setting
1) Method of setting 1. IF
[1: VCO]
1] 1 key....select 1: IF
2] 1 key....select 1: VCO
3] The VCO (CW) screen will be displayed in
yellow when the AFC voltage is at a certain
level and in blue when it is at other levels.
4] Display key....as you press this twice you will
return to the Service Menu.
[2: Delay Point]
1] 1 key....select IF.
2] 2 key....select 2: Delay Point.
2JVC AV-29SX1 EK
Service Adjustments Cont’d.
3] Function -/+ key...Set (adjust) the setting
values for the setting items.
4] Video/Sound key....Memorise the set value.
(Before storing the setting values in memory,
do not press the CH, TV/EXT, Display, Power
On/Off keys - if you do the values will not be
stored in memory).
5] Display key....When this is pressed twice you
will return to the Service menu.
Method of Setting
2.V/C, 3: Audio, 4: DEF., and 5: VSM Pre-set
1] 2-5 keys: select one from...
2: V/C, 3: Audio, 4: DEF., and 5: VSM Pre-set.
2] Function Up/down key....Select setting items.
3] Function -/+ key....Set (adjust) the setting
values of the setting items. (When 1: Cut-off
of 2: V/C is selected, press its “-” or “+”
function key and the whole screen will
change to a faint horizontal line appearing in
its centre. Press the same “-” or “+” key again
and the screen will return to the original 1:
Cut-off screen).
4] Video/Sound key....Memorise the setting
value. (Before storing the setting values in
memory, do not press the CH, TV/EXT,
Display, Power On/Off keys - if you do the
values will not be stored in memory).
5] Display key....Return to the SERVICE MENU.
4) Release of Service Menu
1] After completing the setting, return to the
Service Menu, then again press the Display
key.
Service Adjustments
B1 Voltage Check
Measuring Instrument Signal generator
Test Point
TP-91 (1st terminal of X connector)
TP-E (QUAS)
Description
1] Receive a whole black signal.
2] Connect a DC voltmeter to TP-91 and to TP-
E (QUAS).
3] Make sure that the voltage is DC 143 ± 2.0V.
Focus Adjustment
Measuring Instrument:Signal generator, DC
voltmeter
Adjustment Part: Focus VR [built-in HVT]
Description:
1] Receive a cross hatch signal.
2] While watching the screen, adjust the Focus
VR to make the vertical and horizontal lines
as fine and sharp as possible.
3] Make sure that when the screen is darkened,
the lines remain in good focus.
IF Circuit Adjustment
VCO Adjustment
Measuring Instrument: Remote Control Unit
Adjustment Part: T010 TRANSF.
Description:
Do not make any adjustment unless the
adjustment is out of way and you cannot get
the correct picture.
1] Select 1: IF from the Service Menu.
2] Press 1 key and select 1: VCO.
3] Select a receivable broadcast channel with
the Channel key.
4] Turn the core of T010 Transf. until the colour
of the characters TOO HIGH displayed on the
screen changes from blue to yellow.
5] Then slowly turn the core of T010 Transf. to
the left until the colour of the characters
BELOW REFERENCE changes from blue to
yellow.
6] Perform Channel Pre-set again and make
sure that each broadcast is being received
properly.
Fig. 5
Fig. 6
Adjustment of Delay Point (AGC)
Measuring Instrument:
Remote control unit
Adjustment Point:
Delay Point (AGC Take-over)
Description:
1] Receive a black and white signal (colour off).
2] Select 1: IF from the Service Menu.
3] Select 2: Delay Point by pressing the 2 key
on the remote control.
4] Adjust the Function -/+ key until video noise
disappears.
5] Press the Video/Sound key and memorise the
setting value.
6] Turn to other channels and make sure there
are no irregularities.
Setting (Adjustment) Variable Range Initial Setting Value
item
Delay Point 0 ~ 63 4
(AGC Take Over)
Table 4
Setting of VSM Pre-set
Measuring Instrument: Remote control unit
Adjustment Part:
1: Bright
2: Cont.
3: Colour
4: Sharp
5: Tint
6: R Drive
7: G Drive
8: B Drive
9: Bass
10: Treble
Description:
1] Select 5: VSM Pre-set from the Service
Menu.
2] Select Standard with the Cinema/Game key.
3] Adjust the Function Up/Down and Function -/
+ key to bring the set values of 1: Bright - 10:
Treble to the values shown in the table above.
4] Press the Video/Sound key and memorise the
set value.
5] Respectively select the VSM Pre-set mode for
User, Cinema and Game, and make similar
adjustment as in 3: above.
Setting Values of VSM Preset
VSM Preset Mode Setting Value
Setting Item Standard User Cinema Game
1. Bright 0 0 0 +2
2. Cont. +10 +10 +2 +2
3. Colour 0 0 -2 0
4. Sharp 0 0 -2 -2
5. Tint 0 0 0 0
6. R. Drive 0 0 0 0
7. G. Drive 0 0 -2 0
8. B. Drive 0 0 -6 0
9. Bass 0 0 +6 +4
10. Treble 0 0 +2 0
Table 5
Video/Chroma Circuit Adjustment
The setting (adjustment) using the remote
control unit is made on the 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.
Setting (adjustment) item Variable Range Initial Setting
Value
1. CUT OFF On/Off Off
2. R. DRIVE -31 ~ +32 +12
3. G. DRIVE -31 ~ +32 +2
4. B. DRIVE
(Do not adjust) -31 ~ +32 0
Fixed
5. BRIGHT -31 ~ +32 +6
6. CONT. -41 ~ +22 -5
Table 6
Setting Colour Variable PAL NTSC NTSC
(adjustment) System Range 3.58 4.43
item
7. COLOUR TV +3 --- --Initial -31~ +32
setting Comp. --- +12 (+12)
value Video
8. TINT Comp.
Initial Video
setting
value -31 ~+32 --- -2 (-2)
Table 7
White Balance Adjustment (Low Light)
Measuring Instrument:
Signal Generator, Remote Control Unit
Adjustment Part:
R. CUT OFF VR (R108),
G. CUT OFF VR (R107),
B. CUT OFF VR (R109),
SCREEN VR
Description:
1] Receive a black and white signal (colour off).
2] Select 2: V/C from the Service menu.
3] Select 1: Cut Off with the Function Up/Down
key.
4] Show one horizontal line with the Function -/+
key. With the Screen VR adjust so that the
horizontal line will not be too bright.
5] Turn the Cut Off VR respectively for R, G and
B fully to the left (to the left direction when
seen from the rear).
6] Gradually turn the screen VR from the left
end to the right to bring one of the red, green
or blue colours faintly visible.
7] By adjusting the Cut Off VR, bring out the
other two colours and make one horizontal
line visible in white.
8] Turn the Screen VR and bring one horizontal
line faintly visible.
9] With the -/+ key turn off 1: Cut Off Screen.
White Balance Adjustment (Low Light)
Measuring Instrument: Signal Generator,
Remote Control Unit
Adjustment Part:
2. R. DRIVE,
3. G. DRIVE,
4. B. DRIVE (do not adjust)
Description:
1] Receive a black and white signal (colour off).
2] Select 2: V/C from the Service menu.
3] Select 2: R. Drive and 3: G. Drive with the
Function Up/Down key.
4] Change the screen colour to white with the
Function -/+ key.
5] Press the Video/Sound key and memorise the
respectively set values.
Sub Bright Adjustment
Measuring Instrument: Remote Control Unit
Adjustment Part: 5. BRIGHT
Description:
1] Receive any broadcast.
2] Select 2: V/C from the Service Menu.
3] Select 5: Bright with the Function Up/Down key.
4] Set the initial setting value with the Function -
/+key.
5] If the brightness is not the best with the initial
set value, make fine adjustment until you get
the best brightness.
6] Press the Video/Sound key and memorise the
set value.
Sub Cont. Adjustment
Measuring Instrument: Remote Control Unit
Fig. 7
(NTSC 3.58 COLOUR)
1] Input NTSC 3.58 MHz Composite Video
signal (full field colour bar 75% white) from
the EXT terminal.
2] Set the initial setting value of NTSC 3.58
Colour with the Function -/+ key.
3] Adjust NTSC 3.58 Colour and bring the value
of (A) of fig. 7 to 0V (voltage difference
between white and blue).
4] Press the Video/Sound key and memorise the
set values.
(NTSC 4.43 COLOUR)
When NTSC 3.58 is set, NTSC 4.43 will be
automatically set at the same value as NTSC
3.58.
Sub Tint I Adjustment
Measuring Instrument: Remote Control Unit
Adjustment Part: 8: Tint
Deflection Circuit Adjustment
There are 2 modes of adjustment: 1 - 50Hz 4:3,
Description:
[Method of adjustment without using measuring
equipment]
2 - 60Hz 4:3depending upon the kind of signals
(Vertical Frequency 50Hz, 60Hz).
When adjusted in the 1 50Hz 4:3 mode, the
mode 2 will be linked to the mode 1 and will be
(NTSC 3.58 Tint)
1] Input Composite Video signal of NTSC 3.58
MHz from the EXT terminal.
automatically adjusted for the same value.
When adjusted in mode 2:, only this mode will
be adjusted singly.
2] Select 2: V/C from the Service Menu.
3] Select 8: Tint with the Function Up/Down key.
4] Set the initial setting value of NTSC 3.58 Tint
with the Function -/+ key.
5] If you cannot get the best Tint with the initial
setting value, make fine adjustment until you
The setting (adjustment) using the Remote
Control Unit is made on the basis of the initial
setting values. The setting values which adjust
the screen to the optimum condition can be
different from the initial set values.
get the best Tint.
6] Press the Video/Sound key and memorise the
setting value.
1. Vertical Slope Adjustment
Measuring Instrument:
Signal Generator, Remote Control Unit
Adjustment Part:
1: V-Slope
Description:
[1 50Hz 4:3]
Fig. 8
(NTSC 4.43 Tint)
When NTSC 3.58 is set NTSC 4.43 will be
automatically set at the same value as NTSC
3.58.
Sub Tint II Adjustment
1] Receive a circle pattern signal of vertical
frequency 50Hz.
2] Select 4: DEF from the Service Menu.
3] Select 1: V. Slope with the Function Up/Down
key.
4] Set the initial setting value of V. Slope
(50 Hz 4:3) with the Function -/+ key.
5] Adjust V. Slope and make the screen’s centre
line and the blanking line coincide.
Measuring Instrument:
Signal Generator, Oscilloscope, Remote Control
Unit
Test Point: TP-47B
Adjustment Part: 8: Tint
Description:
[Method of adjustment using measuring
equipment]
(NTSC 3.58 Tint)
1] Input Composite Video signal (full field colour
bar 75% white) of NTSC 3.58 MHz from the
EXT terminal.
2] Select 2: V/C from the Service Menu.
3] Select 8: Tint with the Function Up/Down key.
4] Set the initial setting value of NTSC 3.58 Tint
with the Function -/+ key.
5] Connect the oscilloscope to TP-47B.
6] Adjust NTSC 3.58 Tint to bring the value of
(A) of fig. 8 to 0V (voltage difference between
white and magenta).
Fig. 9
2. Vertical Shift Adjustment
Adjustment Part: V-Shift
Description:
6] Select 2: V-Shift and set the initial setting
value.
7] Adjust V-Shift to make A = B.
8] Press the Video/Sound key and memorise set
value.
3. Vertical Size Adjustment
Adjustment Part: 3: V-Size
7] Press the Video/Sound key and memorise the
setting data.
(NTSC 4.43 Tint)
When NTSC 3.58 is set, NTSC 4.43 will be
automatically set at the same value as NTSC
3.58.
Table 8
Seting (Adjustment) Adjustment Variable Range AV-29SX1EK
Item Name 50 Hz 60 Hz
1. V-Slope Vertical height -31 ~ +32 -3 -1
(Size of bottom side of screen)
2. V Shift Vertical centre -31 ~ +32 +4 0
3. V-Size Vertical height -31 ~ +32 +2 -1
4. H-Cent Horizontal centre -31 ~ +32 -7 +11
5. H-Size Horizontal width -31 ~ +32 +21 -1
6. EW-Pin Side pin correction -31 ~ +32 +16 -1
7. Trapez Trapezioidal distortion correction -31 ~ +32 -9 -1
8. V-S.CR Vertical height correction -31 ~ +32 -13 -1
9. EW-Cor Side pin four corner correction -31 ~ +32 -4 -1
Fig. 10
Initial setting value
4:3 4:3
3JVC AV-29SX1 EK
Service Adjustments
Cont’d.
Description:
9] Receive a cross hatch signal.
10]Adjust 3: V-Size and set the initial setting
value.
11]Adjust V-Size and make the vertical screen
size 92% of the picture size.
12]Press Video/Sound key and memorise the
set value. (See fig 12.)
4. Hori. Centre Adjustment
Adjustment Part: H-Cent
Description:
13]Receive a circle pattern signal.
14]Select 4: H-Cent and set the initial setting
value.
15]Adjust H-Cent to make C = D.
16]Press Video/Sound key and memorise the
set value.
25]Adjust V-S CR and make the gaps between
the horizontal lines the same.
9. EW-COR Adjustment
Adjustment Part: 9: EW-COR
Description:
26]Select 9: EW-COR and set the initial setting
value.
27]Adjust EW-COR and make the vertical lines
at the four corners of the screen straight.
28]Press Video/Sound key and memorise the
set values.
29]Make sure the adjustment is properly done
on the screen of 2 60 HZ 4: 3.
T-B Pin Adjustment
Adjustment Part:L001 (T-B PIN PWB)
Description:
Adjustment of the deflection circuit must be
complete.
1. Receive a cross hatch signal.
2. Adjust L001 on T-B pin PWB Assy and
straighten the upper and lower lines as
illustrated in fig. 13.
Audio Circuit
Do not touch 3: Audio (1: CONC Limit, 2: A2 ID
THR) of the Service Menu as it requires no
adjustment.
Setting (adjustment) item Variable range Initial
setting
value
1. Conc. Limit (Do not adjust) 00H ~ FFH 0AH
2. A2 ID IHR (Do not adjust) 00H ~ FFH 12H
Table 9
Fig. 11
5. Hori. Size Adjustment
Adjustment Part: H-Size
Description:
17]Receive a cross hatch signal.
18]Select 5: H-Size and set the initial setting
value.
19]Adjust H-Size and make the horizontal
screen size 92% of the picture size.
EW-PIN Adjustment
6. Adjustment Part: EW-PIN
Description:
20]Select 6: EW-PIN and set the initial setting
value.
21]Adjust EW-PIN and make the first vertical
lines at the left and right edges of the screen
straight. Make sure the second vertical lines
are also straight.
Fig. 13
Remote
Control
Diagram
CRT Diagram
Control
Front
Diagram
Fig. 12
7. Trapez Adjustment
Adjustment Part: 7: Trapez
Description:
22]Select 7: Trapez and set the initial setting
value.
23]Adjust Trapez and bring the vertical lines at
the right and left edges of the screen in
parallel.
8. V-S CR Adjustment
Adjustment Part: V-S CR
Description:
24]Select 8: V-S CR and set the initial setting
value.
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