Page 1
JVC AV-21VM1 EK
1 A51EAL55X01-J2 PICTURE TUBE(ITC) V01
2 CELD018-005J7 DEG. COIL L01
4 CE42545-00AJ1 HVT(SERVICE) (T1551)
5 AEEMP002-185 POWER CORD
7 CM12644-B01-E REAR COVER
9 CM22875-004-E RATING LABEL
9 2158VM1EK-SMAE SET UP GUIDE
10 2158VM1EK-IBAE INST BOOK
17 QSP4D21-C05 PUSH SWITCH (MAIN POWER)
C1522 QFZ0117-9501L MPP CAP. 9500p F1.5kVH ± 2.5%
C1524 QFZ0119-404L MPP CAP. 0.4 µF 200V ± 3%
D1582 MA4068(N)C1-T2 ZENER DIODE
D1583 BYD33G-T3 SI. DIODE
C1901 QFZ9040-474N MF CAP. 0.47µFAC275V
C1904 QFZ9040-473N MF CAP. 0.47µFAC275V
C1905 QCZ9034-472A C CAP. 4700p FAC400V
C1906 QCZ9034-472A C CAP. 4700p FAC400V
C1907 QCZ9034-472A C CAP. 4700p FAC400V
C1992 QCZ9041-471A C CAP. 470p FAC400V
C1993 QCZ9041-332A C CAP. 3300p FAC400V
CP1901 ICP-N25-Y I.C. PROTECT
D1901 D3SBA60 DIODE BRIDGE
F1901 QMF51D2-3R15J1 FUSE T3.15AH
FR1406 QRH127J-1R5M F R 1.5 OHM 1/2W
FR1551 QRH127J-220M F R 22 OHM 1/2W
FR1552 QRH027K-R82M F R 0.82 OHM 2W
FR1553 QRH127K-2R2M F R 2.2 OHM 1/2W
FR1554 QRZ0054-4R7M F R 4.7 OHM 1/4W
FR1555 QRZ027J-1R8M F R 1.8 OHM 2W
FR1556 QRH027J-2R2M F R 2.2 OHM 2W
FR1958 QRH027J-1R8M F R 1.8 OHM 2W
FR1961 QRZ0054-331M F R 330 OHM 1/4W
IC1902 TLP621(D4)-LF2 PHOTO COUPLER
LF1901 AEELF002-001 LINE FILTER
Q1521 BU2506DX POWER TRANSISTOR H.OUT
R0403 QRZ0054-470M F R 47 OHM 1/4W
R0504 QRZ0054-330M F R 33 OHM 1/4W
R0509 QRZ0054-470M F R 47 OHM 1/4W
R1585 QRV141F-2201AY MF R 2.2k OHM 1/4W
R1586 QRV141F-1402AY MF R 14k OHM 1/4W
R1991 QRZ0057-825 C R 8.2M OHM 1W
SK3001 CE42536-001J1 CRT SOCKET
T1501 CE42034-001 H.DRIVE TRANSF.
T1551 CE42545-00AJ1 HVT (SERVICE)
T1901 CETS020-001J6 SW TRANSF
TH1901 CEKP010-001J2 W-PTC
VA1901 ERZ-C10VK621A VARISTOR
E2prom Replacement .................................................................. JVC AV-29SX1EK 5
Service Mode ................................................................................JVC AV-29SX1EK 5
Basic Operation of Service Menu ...............................................JVC AV-29SX1EK 5
Matrix
ItemSee Model Vol
Specifications
Dimensions (W X H X D) ......................................................... 49.8cm x 46.6cm X 49.1cm
Mass ............................................................................................................................ 20.2kg
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 Freq................................ 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 ................................................................................................. 70W/h
Picture Tube ................................................................................ 21” ( Visible size: 51cm),
High Voltage .................................................. 26.5kV +1kV/-1.5kV (at zero beam current)
Speaker ................................................................... (5cmx9cm) x2, Oval Type, 8 Ohm x 2
Audio Power........................................................................................................... 5W + 5W
EXT Input / Output ..................... EXT-1/EXT-2 : 21-pin Euroconnector (SCART socket)
TV Stand ........................................................................................................... RK-CM20(A)
Remote Control Unit .............................................RM-C760 [Battery size AAA (R03) X2]
Design & specification subject to change without notice
Adjustments
B1 VOLTAGE CHECK
Item Measuring Test point Adjustment part Description
instrument
Check of B1 Signal generator TP-91 1. Receive a whole black signal.
Voltage 2. Connect a DC voltmeter to TP-91
DC Voltmeter TP-E
FOCUS ADJUSTMENT
Item Measuring Test point Adjustment part Description
instrument
Adjustment Signal FOCUS VR 1. Receive a cross-hatch signal.
of FOCUS generator [built-in HVT] 2.While watching the screen, adjust the
Diagonally measured
.
and TP-E
3. Make sure that the voltage is DC117 ± 2.0V.
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.
.
Recommended Safety Parts
ItemPart No.Description
IF CIRCUIT ADJUSTMENT
Item Measuring Test point Adjustment part Description
Adjustment Remote T010 TRANSF. Do not make any adjustment unless the of VCO
Adjustment Remote DELAY POINT 1. Receive a black and white signal (colour off).
of DELAY control unit (AGC TAKE-OVER) 2. Select 1 IF from the SERVICE MENU.
POINT (AGC) 3. Select 2.DELAY POINT by pressing the 2 key
instrument
control unit adjustment is out of way and you cannot get
VCO (CW)
TOO HIGH of the characters TOO HIGH displayed
ABOVE REFERENCE on the screen changes from blue to
BELOW REFERENCE YELLOW (Step 1)
TOO LOW 5. Then slowly turn the core of T010 TRANSF. to
■ = EXIT REFERENCE
Screen display Step
TOO HIGH Yellow ➔ Blue ➔ Blue
ABOVE REFERENCE Blue ➔ Yellow ➔ Blue
BELOW REFERENCE Blue ➔ Blue ➔ Yellow
TOO LOW Blue ➔ Blue
MHz fv 4. Turn the core of T010TRANSF. until the colour
***.**
➔
➔
1 ➔ 2 ➔ 3
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.
yellow.
the left until the colour of the characters BELOW
changes from blue to yellow (Step 3)
6. Perform CHANNEL PRESET again, and make
sure that each broadcast is being received
properly.
on the remote control.
4. Adjust the FUNCTION -/+ key until video noise
disappears.
5. Press the VIDEO/SOUND key and memorize
the setting value.
6. Turn to other channels and make sure that
there are not irregularities.
Setting (Adjustment) item Variable range Initial setting value
DELAY POINT 0 ~ 63 9
(AGC TAKE-OVER)
VSM PRESET SETTING
Item Measuring Test point Adjustment part Description
instrument
Setting of Remote 1. BRIGHT 1. Select 5.VSM PRESET from the SERVICE
VSM control unit 2. CONT. MENU.
PRESET 3. COLOUR 2. Select STANDARD with the CINEMA/GAME key.
4. SHARP 3. Adjust the FUNCTION UP/DOWN and FUNCTION
5. TINT -/+ key to bring the set values of 1. BRIGHT~ 10.
6. R DRIVE TREBLE to the values shown in the table.
7. G DRIVE 4. Press the VIDEO/SOUND key and memorize the
8. B DRIVE set value.
9. BASS 5. Respectively select the VSM PRESET mode for
10.TREBLE USER, CINEMA and GAME, and make similar
adjustment as in 3 and 4 above.
SETTING VALUES OF VSM PRESET
Setting item VSM preset mode STANDARD USER CINEMA GAME
1. BRIGHT SETTING VALUE 0 0 0 +2
2. CONT. SETTING VALUE +10 +10 +2 +2
3. COLOUR SETTING VALUE 0 0 -2 0
4. SHARP SETTING VALUE 0 0 -2 -2
5. TINT SETTING VALUE 0 0 0 0
6. R. DRIVE SETTING VALUE 0 0 0 0
7. G. DRIVE SETTING VALUE 0 0 -2 0
8. B. DRIVE SETTING VALUE 0 0 -6 0
9. BASS SETTING VALUE +4 +4 +8 +6
10. TREBLE SETTING VALUE +4 +4 +6 +2
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 Variable Initial
(adjustment) range setting
item value
1. CUTOFF ON/OFF OFF
2. R DRIVE -31~ +32 +12
3. G DRIVE -31~ +32 +2
4. B DRIVE -31~ +32 0
(Do not adjust) (Fixed)
5. BRIGHT -31~ +32 +6
6. CONT. -41~ +22 -10
Setting Colour Variable PAL SECAM NTSC NTSC
(adjustment) system range 3.58 4.43
item
7. COLOUR TV + 3 - - initial setting -31~ +32 - - +12 (+0)
value Comp. VIDEO
8. TINT
initial setting Comp. VIDEO -31~ +32 - - -2 (0)
value
Item Measuring Test point Adjustment part Description
instrument
Adjustment Signal R. CUT OFF VR 1.Receive a black and white signal (colour off).
of WHITE generator (R108) 2.Select 2.V/C from the SERVICE MENU.
BALANCE 3.Select 1.CUT OFF with the FUNCTION UP/DOWN
(Low light) key.
Remote G. CUT OFF VR 4.Show one horizontal line with the FUNCTION -/+
control unit (R107) key. With the SCREEN VR, adjust so that
the horizontal line will not be too bright.
B. CUT OFF VR 5.Turn the CUT OFF VR respectively for R, G and B
(R109) fully to the left (to the left direction when seen from
the rear).
6.Gradually turn the SCREEN VR from the left end to
SCREEN VR the right direction to bring one of the red, green and
blue colours faintly visible.
7.By adjusting the CUT OFF VR, bring out the other 2
colours and make one horizontal line visible in white
8.Turn the SCREEN VR and bring one white horizontal
line faintly visible.
9. With the -/ + key, turn off 1 CUTOFF screen.
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JVC AV-21VM1 EK
Adjustments Cont’d
Item Measuring Test point Adjustment part Description
Adjustment Signal 2. R. DRIVE 1. Receive a black and white signal (colour off).
of WHITE generator 3. G. DRIVE 2. Select 2.V/C with the SERVICE MENU.
BALANCE 3. Select 2.R DRIVE and 3.G DRIVE with the
(High light) Remote (Do not adjust) 4. Change the screen colour to white with the
Adjustment Remote 5. BRIGHT 1. Receive any broadcast.
of control unit 2. Select 2.V/C from the SERVICE MENU.
SUB BRIGHT 3. Select 5.BRIGHT with the FUNCTION UP/
Adjustment Remote 6. CONT. 1. Receive any broadcast.
of control unit 2. Select 2.V/C with the SERVICE MENU.
SUB CONT. 3. Select 6.CONT. with the FUNCTION UP/DOWN
4. Set the initial setting value with the FUNCTION
Adjustment Remote 7. COLOUR [Method of adjustment without using measuring
of control unit instrument]
SUB
COLOUR I PAL COLOUR (PAL COLOUR)
Adjustment Signal TP-47B 7. COLOUR [Method of adjustment using measuring instrument]
of generator TP-E
SUB (CRT SOCKET PAL COLOUR (PAL COLOUR)
COLOUR II Oscilloscope PWB) 1. Receive a PAL full field colour bar signal (75%
instrument
4. B. DRIVE FUNCTION UP/ DOWN key.
control unit FUNCTION -/+ key.
NTSC COLOUR (NTSC 3.58 COLOUR)
Remote DOWN key.
control unit 4. Set the initial setting value of PAL COLOUR
NTSC COLOUR (NTSC 3.58 COLOUR)
5. Press the VIDEO/SOUND key, and memorize
the respectively set values.
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 memorize
the set value.
-/ + key.
5. If the contrast is not the best with the initial set
value, make fine adjustment until you get the best
contrast.
6. Press the VIDEO/SOUND key and memorize
the set value.
1. Receive a PAL broadcast.
2. Select 2.V/C trom the SERVICE MENU.
3. Select 7.COLOUR with the FUNCTION UP/
DOWN key.
4. Set the initial setting value for PAL COLOUR
with the FUNCTION -/+ key.
5. If the colour is not the best with the initial set
value, make fine adjustment until you get the best
colour.
6. Press the VIDEO/SOUND key and memorize
the set value.
7. Input NTSC3.58MHz COMPOSITE VIDEO
signal from the EXT terminal.
8. Make similar fine adjustment of NTSC3.58
COLOUR as previously.
(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.
white).
2. Select 2.V/C from SERVICE MENU.
3. Select 7.COLOUR with the FUNCTION UP/
with the FUNCTION -/ + key.
5. Connect the oscilloscope to TP-47B.
6. Adjust PAL COLOUR and bring the value of (A)
in the illustration to -4V. (Voltage difference
between white and blue.
7. Press the VIDEO/SOUND key and memorize
the seting value.
1. Input NTSC 3.58MHz 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.
Item Measuring Test point Adjustment part Description
Adjustment Remote 8. TINT [Method of adjustment without using measuring
of control unit instrument]
SUB TINT I
Adjustment Signal TP-47B 8. TINT [Method of adjustment using measuring
of generator TP-E
SUB TINT II
instrument
3. Adjust NTSC 3.58 COLOUR and bring the
value of (A) of the illustration to 0V.
4. Press the VIDEO/SOUND key and memorize
the set value.
(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.
NTSC TINT (NTSC 3.58 TINT)
1. Input COMPOSITE VIDEO signal of
NTSC 3.58MHz from the EXT terminal.
2. Select 2.V/C from the SERVICE MENU.
3. Select STINT with the FUNCTION UP/DOWN
key.
4. Set the initial selling 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 get
the best tint.
6. Press the VIDEO/SOUND key and memorize
the set value.
(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.
instrument]
(CRT NTSC TINT (NTSC 3.58 TINT)
Oscilloscope SOCKET 1. Input COMPOSITE VIDEO signal (full field
PWB) colour bar 75% white) of NTSC 3.58MHz from
the EXT terminal.
Remote 2. Select 2.V/C from the SERVICE MENU.
control unit 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 NTSC3.58 TINT to bring the value of
(A) of the illustration to 0V.
7. Press the VIDEO/SOUND key and memorize
the setting value.
(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.
DEFLECTION CIRCUIT ADJUSTMENT
There are 2 modes of adjustment - (1) 50Hz 4 3 and (2) 60Hz 4: 3 - depending 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
automatically adjusted for the same value.
When adjusted in the mode (2) only this mode will be adjusted singly.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.
Setting Adjustment name Variable AV-21VM1EK AV-25VM1EK AV-28VM1EK
(adjustment) range Initial setting value Initial setting value Initial setting value
item 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz
1. V-SLOPE Vertical hight -31~ + 32 - 2 0 -1 0 -1 0
(Size of bottom side of screen)
2. V-SHIFT Vertical center -31~ + 32 + 3 0 +2 -1 +2 -1
3. V-SIZE Vertical hight -31~ + 32 + 1 -1 -10 -2 -10 -2
4. H-CENT Horizontal center -31~ + 32 - 5 +10 -5 +10 -5 +10
5. H-SIZE Horizontal width -31~ + 32 - - +20 0 +22 0
6. EW-PIN Side pin correction -31~ + 32 - - -2 0 -2 0
7. TRAPEZ Trapezoidal distortion correction -31~ + 32 - - -5 0 -5 0
8. V-S.CR Vertical hight correction -31~ + 32 -5 (Fixed) -1 (Fixed) +3 (Fixed) 0 (Fixed) +3 (Fixed) 0 (Fixed)
9. EW-COR Side pin four corner -31~ +32 - - +1 (Fixed) 0 (Fixed) -5 (Fixed) 0 (Fixed)
correction
4:3 4:3 4:3 4:3 4:3 4:3
Item Measuring Test point Adjustment part Description
instrument
1. Adjustment Signal 1. V-SLOPE [(1) 50Hz 4:3]
of VERTICAL generator
SLOPE 1.Receive a circle pattern signal of vertical
frequency 50Hz.
2.Select 4.DEF from the SERVICE MENU.
Remote 3.Select 1 V-SLOPE with the FUNCTION UP/
control unit DOWN key.
4. Set the initial setting value of V-SLOPE
(50Hz 4:3) with the FUNCTION -/+ key.
5. Adjust V-SLOPE and make the screen’s
center line and the blanking line coincide.
2. Adjustment 2. V-SHIFT 6. Select 2.V-SHIFT and set the initial setting
of value.
VERTICAL SHIFT 7. Adjust V-SHIFT to make A = B.
8. Press the VIDEO / SOUND key and
memorize the set value.
3. 3. V-SIZE 9. Receive a cross-hatch signal.
Adjustment 10. Adjust 3.V-SIZE and set the initial setting
value.
of 11. Adjust V-SIZE and make the vertical screen
VERTICAL size 92% of the picture size.
SIZE 12. Press the VIDEO / SOUND key and
memorize the set value.
4. 4. H-CENT 13. Receive a circle pattern signal.
Adjustment 14. Select 4.H-CENT and set the initial setting
of value.
HORI. 15. Adjust H-CENT to make C=D
CENTRE 16. Press the VIDEO/SOUND key and
memorize the set value.
5. 5. H-SIZE 17. Receive a cross-hatch signal.
Adjustment 18. Select 5.H-SIZE and set the initial setting
of HORI. value.
SIZE (N/A) 19. Adjust H-SIZE and make the horizontal
screen size 92% of the picture size.
6. 6. EW-PIN 20. Select EW-PIN and set the initial setting
Adjustment value.
of EW-PIN (N/A) 21.Adjust EW-PIN and make the 1st vertical
lines at the left and right edges of the screen
straight. Also make sure that the 2nd vertical
lines are also straight.
7. 7. TRAPEZ 22. Select 7.TRAPEZ and set the initial setting
Adjustment 23. Adjust TRAPEZ and bring the vertical lines
of TRAPEZ at the right and left edges of the screen
(N/A) in parallel.
8. 8. V-S. CR 24. Select 8.V-S. CR and set the initial setting
Adjustment values.
of V-S. CR 25.Adjust V-S. CR and make the gaps between
the horizontal lines same.
9. 9. EW-COR 26. Select 9.EW-COR and set the initial setting
Adjustment values.
of EW-COR (N/A) 27.Adjust EW-COR and make the vertical lines
at the four corners of the screen straight.
28. Press the VIDEO/SOUND key and
memorize the set values.
29. Make sure that the adjustement is properly
done on the screen of (2) 60Hz 4:3
AUDIO CIRCUIT
Do not touch 3.AUDIO (1. CONC LIMIT, 2. A2 ID THR) of the SERVICE MENU as it requires no adjustment.
3. AUDIO CIRCUIT
Setting (adjustment) item Variable AV-21VM1EK AV-25M1EK
range Initial setting AV-28M1EK
value (fixed) (fixed)
1. CONC LIMIT (Do not adjust) 00H ~ FFH 0AH 0AH
2. A2 ID THR (Do not adjust) 00H ~ FFH 12H 12H
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JVC AV-21VM1 EK
Sub Menu Screen
Location Guide
Remote Control Diagram
Service Menu Screens
Front Control Diagram
Page 4
Page 5
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