JVC C-14 ET1 EK
1
Matrix
Item See Model Book
CRT Base.....................................................................................................C-14 E1 EK 5
Specifications
Item Content
Dimensions ............................................................... 360mm(W) x 334mm(H) x 378mm(D)
Mass .......................................................................................................10.5kg (TV set only)
TV System ...................................................................................................................... PAL I
Teletext System .............................................................................................................FLOF
Channel Coverage
UHF band......................................................................................................................21~ 69
Frequency Range
UHF band...................................................................................................470MHz~ 862MHz
Intermediate Frequency
Video ......................................................................................................................... 39.5MHz
Sound........................................................................................................................ 33.5MHz
Chroma ................................................................................................................... 35.07MHz
Video/Sound Separation............................................................................................... 6MHz
Antenna Input Impedance .........................................................................75Ω unbalanced
Power Input .................................................................................................... 230V AC, 50Hz
Power Consumption .......................................................................................................70W
Picture Tube......................................................................................... 14” (36cm) diagonal
High Voltage.........................................................................< 26kV (at zero beam current)
Speaker....................................................................................................... 5cm x 9cm (16Ω)
Audio Output..........................................................................................................1W (max.)
AV Connection....................................................................................... 21 pin scart socket
Service Adjustments
B+ ADJUSTMENT
1. Connect the digital volt meter to TP401.
2. Adjust semi-fixed resistor VR901 until meter
reading DC 112 .25V ± 0.25V.
HORIZONTAL CIRCUIT ADJUSTMENT
1. Receive colour bar or crosshatoh pattern.
2. IC301 (Pin 28, 29) short by 1K Ohm resistor.
3. Adjust VR303 to Obtain the picture running at
center.
4.Remove the 1K Ohm resistor.
COLOUR DEMODULATOR ADJUSTMENT,
DELAY LINE ADJUSTMENT
1. Receive Philips Pattern.
2. Set Contrast control to minimum position.
3. Set Colour control to maximum position.
4. Connect Oscilloscope to TP301 (B-out).
5. Adjust CT301 to obtain the waveform as in
Fig.1.
6. Adjust VR301 to obtain the waveform as in
Fig 1.
7. Adjust T301 to obtain the waveform as in Fig 1.
Fig. 1
VERTICAL CIRCUIT ADJUSTMENT
1. Receive the crosshatch pattern.
2. Connect the Frequency Counter between VDEFLECTION YOKE connector and GND.
3. Connect the lead wire from TP106 to GND.
4. Adjust V-HOLD (VR304) to the reading 44Hz.
(C-14 ET1 EK) 45Hz ± 0.5 Hz (C-14 E1 EK
5. Remove the lead wire from TP106 to GND.
6. Adjust V-SIZE (VR401) control to obtain a
normal picture.
WHITE BALANCE ADJUSTMENT
1. Receive a black and white picture signal.
2. Turn the red, green and blue CUT OFF
(VR501, VR502, VR504) controls (in the CRT
PW Board) to middle position and turn the
DRIVE (VR503,VR505) controls (in the CRT
PW Board) to middle position.
3. Turn the Screen control on the FBT to
minimum position.
4. Set the SUB-BRIGHTNESS control (VR305)
to middle position, then set the Contrast,
Brightness and Colour control to minimum
position.
5. CN403 (PIN 1 ,2) with join together.
6. Connect volt meter between R508 and
ground, and adjust Brightness control to the
reading of DC138V±2V. If DC138V can not be
obtain, adjust the SUB-BRIGHTNESS control
(VR305).
7. Slowly turn the Screen control clockwise to
the point where a horizontal line just illuminates.
8. Adjust VR501 to get a red horizontal line on
CRT.
9. Adjust VR502 to get a yellow horizontal line
on CRT.
10.Adjust VR504 to get a white horizontal line
on CRT.
11.Take the joiner Out of CN403.
12.Adjust DRIVE (VR503, VR505) controls to
obtain a uniform white picture.
FOCUS ADJUSTMENT
1. Set Contrast control to maximum position and
Brightness control to middle position.
2. Adjust Focus control (on the FBT) to obtain a
sharpest and clearest picture on the CRT.
RF AGC ADJUSTMENT
1. Receive a broadcast.
2. Turn the RF AGC VR (VR101) so that noise
appears on the screen.
3. Turn the RF AGC VR (VR101) until the noise
disappears.
4. Change the channel and check that the
picture is normal.
SUB-BRIGHTNESS ADJUSTMENT
Check the white balance is adjusted.
1. Receive an entirely black signal.
2. Adjust the SUB-BRIGHTNESS VR (VR305)
until the entirely picture lights.
ON SCREEN POSITION ADJUSTMENT
1. Receive the crosshatch pattern.
2. Display the on-screen character. Adjust the
ON-SCREEN (VR601) so that the on-screen
position becomes center.
TELETEXT PICTURE ADJUSTMENT
1. Receive a pattern with teletext signal.
2. Select a teletext page.
3. Connect DC voltage meter to TP303 (IC001
PIN 28) and GND.
4. Adjust Tool to obtain DC 2.5V ± 0.05V.
Remote Handset
Diagram
Recommended Safety Parts
Item Part No. Description
12 046-100001-14A POWER SWITCH
27 102-314000-13 C.R.T. (ITC) (CAI.HONG) 37SX110Y22-DC05
29 108-400141-03 DEGAUSSING COIL ASSY L903
R403 013-688205-82 FP R 0.68Ω 1/2W 5%
R404 013-688205-82 FP R 0.68Ω 1/2W 5%
R433 013-688205-82 FP R 0.68Ω 1/2W 5%
R434 013-688205-82 FP R 0.68Ω 1/2W 5%
R435 013-688205-82 FP R 0.68Ω 1/2W 5%
R901 013-479605-54 UNF R 4.7Ω 5W 5%
R916 013-825305-92 HVR 8.2MΩ 1W 5%
C428 026-332160-41 MPP CAP. 0.0033µF 1600V 5%
C429 026-332160-41 MPP CAP. 0.0033µF 1600V 5%
C430 026-222160-41 MP CAP. 0.0022µF 1600V 5%
C901 026-224211-25 MF CAP. 0.22µF 250V 10%
C902 026-474211-21C MP CAP. 0.47µF AC250V K
C903 026-474211-21C MP CAP. 0.47µF AC250V K
C914 123-222467-41 C CAP. 0.0022 µF 400V M
T402 101-214022-04 FLYBACK TRANSFORMER (FCK-14A028)
T901 001-419220-94 SWITCHING TRANSFORMER
L901 001-190013-95 CHOKE TRANSFORMER
BR901 DS2BA RECTIFIER
F901 082-223150-23 FUSE 3.15A
L902 001-190004-95 LINE FILTER
S901 046-100001-14A POWER SWITCH
R501 013-129305-62 FPR 1.2Ω 1W 5%
061-540016-01 CRT SOCKET
Main
Diagram
Specifications / Service Adjustments / Safety Parts / Main Diagram / Main Diagram Cont’d / Remote Handset
JVC C-14 ET1 EK
2
Main
Diagram
Cont’d
Specifications / Service Adjustments / Safety Parts / Main Diagram / Main Diagram Cont’d / Remote Handset
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