JVC AV-21SX1 EK
General Information
Also Covers
AV-21TS1 EK
Matrix
Item |
See Model |
Book |
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E2prom Replacement |
.............................................................................. AV-25TS1EK |
5 |
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Specifications |
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Item |
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Content |
Dimensions (W x H x D) |
............................................................ 60.5cm x 47.6cm x 47.5cm |
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Mass ..................................................................................................... |
23.7kg AV-21 SX1 EK |
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............................................................................................................ |
.21.3 Kg AV-21TS1 EK |
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TV RF System ............................................................................................................ |
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CCIR (I) |
Colour System .................................................................. |
PAL / NTSC (only in EXT mode) |
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Stereo System ....................................................................................................... |
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NICAM 6.0 |
Teletext system ............. |
FASTEXT (United Kingdom system) / WST (Standard System) |
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Receiving Channels and Freq. |
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UHF: E21 ~ E69 ......................................................................................... |
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470MHz - 862MHz |
Intermediate Frequency |
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VIF Carrier ............................................................................................................... |
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39.5MHz |
SIF Carrier ................................................................................................ |
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33.5MHz (6 0MHz) |
Colour Sub Carrier Frequency |
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PAL ............................................................................................................................ |
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4.43MHz |
NTSC ........................................................................................................ |
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3.58MHz / 4.43MHz |
Aerial Input Terminal .................................................................. |
75Ω Unbalanced, Coaxial |
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Power Input .......................................................................................... |
220 - 240V AC, 50Hz |
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Power Consumption ............................................ |
80W(Avg.) / 137W (Max.) AV-21SX1 EK |
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74W (Avg.) / 114W (Max.) AV-21TS1 EK |
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Picture Tube ............................................ |
21”( Visible size: 51cm), Diagonally measured |
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High Voltage ........................................................... |
26.5kV ± 1.5kV (at zero beam current) |
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Speaker ........................................................ |
(10cm + 2cm) x 2, Round Type AV-21SX1 EK |
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.......................................................................... |
5cm x 9cm x 2cm Oval Type AV-21TS1 EK |
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Audio Output ........................................................................................................ |
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10W + 10W |
EXT Input I Output ...................... |
EXT - 1 I EXT - 2: 21 - pin Euroconnector (SCART socket) |
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Audio Output .................................................... |
Variable (0 ~ 1,000 Vrms) Low impedance |
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Centre .... RCA pin jack |
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Front L, R .... |
RCA pin jack x 2 |
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Surround L,R (Rear) .... |
RCA pin jack X2 |
Headphone Jack ....................................................................... |
Stereo mini jack (ø 3.5mm) |
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Remote Control Unit .................... |
RM C770 [Battery size; AAA (R03) x 2] AV-21SX1 EK |
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......................................................... |
RM C760 [Battery size; AAA (R03) x 2] AV-21TS1 EK |
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Service Adjustments
BEFORE STARTING SERVICE ADJUSTMENT
1.There are 2 ways of adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.
2.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. 3.Turn on the power of the TV and measuring
instrument for warming up for at least 30 minutes before starting adjustment.
4.Make sure that connection is correctly made to AC power source.
5.If the receive or input signal is not specified, use the most appropriate signal for adjustment.
6.Never touch parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service adjustment.
1
7.Preparation for adjustment (presetting): Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT:
MEASURING INSTRUMENT AND FIXTURES
1.DC voltmeter (or digital voltmeter)
2.Oscilloscope
3.Signal generator (Pattern genetator) [PAL / NTSC]
4.Remote control unit
(1) |
SPATIAL EFFECT |
OFF |
(2) |
BASS |
CENTRE |
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TREBLE |
CENTRE |
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BALANCE |
CENTRE |
(3) |
CINEMA / GAME |
STANDARD |
(4) |
ECO |
OFF |
(5)16:9(ASPECT SIZE) 4:3
ADJUSTMENT ITEMS
Adjustment item |
Adjustment item |
B1 VOLTAGE check |
VSM PRESET setting |
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VIDEO/CHROMA circuit adjustment |
FOCUS adjustment |
DEFLECTION circuit adjustment |
IF circuit adjustment |
AUDIO circuit (Do not adlust.) |
ADJUSTMENT LOCATIONS
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 (adjustment) can be made, and they are broadly classified in the following items of settings (adjustments):
1) 1. IF
For entering/adjusting the setting values (adjustment values) of the IF circuit.
2)2. V/C
For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA circuit.
3)3. AUDIO
For entering/adjusting the setting values (adjustment values) of the multiplicity SOUND circuit.
4)4. DEF
For entering/adjusting the setting values (adjustment values) of the DEFLECTION circuit.
5)5. VSM PRESET
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.
SERVICE MENU
1. IF |
2. |
V/C |
3. AUDIO |
4. |
DEF |
5. VSM PRESET |
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1-5: SELECT |
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: EXIT |
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Fig. 1
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 PRESET
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 (OW) 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 1.IF.
(2)2 Key.....Select 2.DELAY POINT. (3)FUNCTION -1+ Key Set (adjust) the setting
values of the setting items. (4)VIDEO/SOUND Key..... Memorize 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.
2) Method of setting 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET
(1)2~5 Keys .....Select one from 2. V/C, 3. AUDIO, 4. DEF and 5. VSM PRESET.
(2)FUNCTION UP/DOWN Key Select setting items.
(3)FUNCTION - / + Key......Set (adjust) the setting values of the setting items. (When 1 CUTOFF 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 center. Press the same or +‘ key again, and the screen will return to the original 1 CUTOFF screen.)
(4)VIDEO/SOUND KeyMemorize 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 screen.
4) Release of SERVICE MENU
1) After completings the setting, return to the SERVICE MENU, then again press the DISPLAY key.
B1 VOLTAGE CHECK
Item |
Measuring |
Test point |
Adjustment part |
Description |
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instrument |
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Check of B1 |
Signal |
TP-91 (B1) |
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1. |
Receive a whole black signal. |
Voltage |
generator |
TP-E |
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2. |
Connect a DC voltmeter to TP-91 and TP-E(4-). |
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DC Voltmeter |
X CONNECTOR |
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3 Make sure that the voltage is DC1 17 ± 2.0V. |
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(MAIN PWB) |
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FOCUS ADJUSTMENT
Item |
Measuring |
Test point |
Adjustment part |
Description |
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instrument |
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Adjustment |
Signal |
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FOCUS VR |
1. |
Receive a cross-hatch signal. |
of FOCUS |
generator |
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[In HVT] |
2. |
While watching the screen, adjust the FOCUS VR to |
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make the vertical and horizontal lines as tine and sharp |
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as possible. |
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3. |
Make sure that when the screen is darkened, the lines |
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remain in good focus. |
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IF CIRCUIT ADJUSTMENT
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Measuring |
Test point |
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Adjustment part |
Description |
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instrument |
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Adjustment |
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Remote |
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T010 TRANSF. |
Do not make any adiustment unless the adjustment is |
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of VCO |
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control unit |
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out of way and you cannot get correct PICTURE. |
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VCO (CW)***.**MHZ |
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1. |
Select l.IF from the SERVICE MENU. |
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TOO HIGH |
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2. |
Press 1 key and select 1 .VCO. |
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ABOVE REFERENCE |
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3. |
Select a receivable broadcast channel with the |
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BELOW REFERENCE |
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---------YELLOW |
CHANNEL key. |
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TOO LOW |
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4. Turn the core of T010 TRANSE. until the colour of the |
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characters TOO HIGH displayed on the screen changes |
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: EXIT |
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from blue to yellow. (Step 1) |
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5.Then slowly turn the core of T0l 0 TRANSE. to the left |
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until the colour of the characters BELOW REFERENCE |
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changes from blue to yellow. (Step 3) |
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6. |
Press the Display key three times to return to normal |
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screen. |
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7. |
Perform CHANNEL PRESET again, and make sure |
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that each broadcast is being received properly |
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Screen display |
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Step |
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1 |
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2 |
3 |
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TOO HIGH |
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Yellow |
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Blue |
Blue |
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ABOVE REFERENCE |
Blue |
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Yellow |
Blue |
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BELOW REFERENCE |
Blue |
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Blue |
Yellow |
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TOO LOW |
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Blue |
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Blue |
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Adjustment |
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Remote |
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DELAY POINT |
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1. |
Receive a black and white signal (colour off). |
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control unit |
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(AGC TAKE-OVER) |
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2. |
Select 1.IF from the SERVICE MENU. |
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DELAY |
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3. |
Select 2.DELAY POINT by pressing the 2 key on the |
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POINT |
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remote control. |
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(AGC) |
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4. Adjust the FUNCTION -/+ key until video noise |
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disappears. |
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5. Press the VIDEO/SOUND key and memorize the set value. |
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6. Turn to other channels and make sure that there are |
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not irregularities. |
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Setting |
Variable |
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Initial setting |
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(adjustment) |
range |
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value |
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DELAY POINT |
0~63 |
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4 |
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(AGC TAKE-OVER) |
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VSM PRESET SETTING |
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Item |
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Measuring |
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Test point |
Adjustment part |
Description |
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instrument |
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Setting of |
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Remote |
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1. |
BRIGHT |
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1. |
Select 5.VSM PRESET from the SERVICE MENU. |
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VSM |
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control unit |
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2. |
CONT. |
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2. |
Select STANDARD with the CINEMA/GAME key. |
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PRESET |
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3. |
COLOUR |
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3. Adjust the FUNCTION UP/DOWN and FUNCTION -/+ |
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4. |
SHARP |
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key to bring the set values of 1. BRIGHT ~10 TREBLE to |
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5. TINT |
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the values shown in the table. |
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6. |
R DRIVE |
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4. |
Press the VIDEO/SOUND key and memorize the set |
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7. |
G DRIVE |
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value. |
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8. |
B DRIVE |
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5. |
Respectively select the VSM PRESET mode for USER, |
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9. |
BASS |
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CINEMA and GAME, and make similar adjustment as in 3 |
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10. TREBLE |
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and 4 above. |
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Specifications / Service Adjustments / Adjustments Cont’d (1) / Adjustments Cont’d (2) / AV Selector PCB / Safety Parts
Front Control Diagram / CRT Diagram / Main Diagram 1 / Main Diagram 2
JVC AV-21SX1 EK |
2 |
Service Adjustments Cont’d
VSM preset mode |
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STANDARD |
USER |
CINEMA |
GAME |
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Setting item |
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1. |
BRIGHT |
SETTING VALUE |
0 |
0 |
+1 |
+ 2 |
2. |
CONT. |
SETTING VALUE |
+10 |
+10 |
+3 |
+ 2 |
3. COLOUR |
SETTING VALUE |
0 |
0 |
-2 |
0 |
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4. |
SHARP |
SETTING VALUE |
0 |
0 |
-2 |
-2 |
5. TINT |
SETTING VALUE |
0 |
0 |
0 |
0 |
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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 |
-5 |
0 |
9. |
BASS |
SETTING VALUE |
+4 (TS1) |
+4 (TS1) |
+8 (TS1) |
+6 (TS1) |
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0 (SX1) |
0 (SX1) |
+6 (SX1) |
+4 (SX1) |
10. TREBLE |
SETTING VALUE |
+4 (TS1) |
+4 (TS1) |
+6 (TS1) |
+2 (TS1) |
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0 (SX4) |
0 (SX1) |
+2 (SX1) |
0 (SX1) |
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SETTING VALUES OF VSM PRESET
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.
* Items in parentheses ( ) are automatically set to below table.
Setting |
Variable |
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Initial |
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(adjustment) |
range |
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setting |
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item |
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value |
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1. CUTOFF |
ON / OFF |
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OFF |
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2. R DRIVE |
-31~ +32 |
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+12 |
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3. G DRIVE |
-31~ +32 |
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+2 |
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4. B DRIVE |
-31~ +32 |
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0 |
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(Do not adjust) |
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(Fixed) |
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5. BRIGHT |
-31~ +32 |
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+6 |
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6. CONT. |
-41~ +22 |
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-10 |
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Setting |
Colour system |
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Variable |
PAL |
NTSC |
NTSC |
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(adjustment) |
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range |
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3.58 |
4.43 |
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item |
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7. COLOUR |
TV |
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+3 |
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- |
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initial |
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-31~ +32 |
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setting |
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value |
Comp. VIDEO |
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+3 |
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+12 |
(+12)(SX1) |
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(0) (TS1) |
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8.TINT |
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initial |
Comp. VIDEO |
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-31~ +32 |
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-2 |
(-2)(SX1) |
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setting |
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(0) (TS1) |
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value |
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9.SHARP |
TV |
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-31~ +32 |
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0 |
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0 |
(0) |
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(21TS 1 EK) |
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-8 ~ +7 |
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Comp. VIDEO |
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(21SX1 EK) |
0 |
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0 |
(0) |
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Item |
Measuring |
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Adjustment part |
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Description |
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instrument |
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Adjustment |
Signal |
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R. CUT OFF VR |
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1. Receive a black and white signal (colour off). |
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of WHITE |
generator |
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2. Select 2.V/C trom the SERVICE MENU. |
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BALANCE |
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G. CUT OFF VR |
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3. Select iCUT OFF with the FUNCTION UP/DOWN key. |
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(Low light) |
Remote |
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4. Show one horizontal line with the FUNCTION -/+ key. With |
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control unit |
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B. CUT OFF VR |
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the SCREEN VR, adjust so that the horizontal line will not be too bright. |
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SCREEN VR |
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5.Turn the CUT OFF VR respectively for R, 0 and B fully to the |
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[ In HVT] |
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left (to the left direction when seen trom the rear). |
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6.Gradually turn the SCREEN VR from the left end to the right |
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direction to bring one of the red, green and blue colours faintly visible. |
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7. By adjusting the CUT OFF VR, bring out the other 2 colours and make |
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one horizontal line visible in white |
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8.Turn the SCREEN VR and bring one white horizontal line faintly visible. |
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9. With the -/ + key, turn off 1 CUTOFF screen. |
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Adjustment |
Signal |
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2. R. DRIVE |
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1. Receive a black and white signal (colour off). |
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of WHITE |
generator |
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3.G. DRIVE |
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2. Select 2.V/C with the SERVICE MENU. |
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BALANCE |
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3. Select 2.R DRIVE and 3.G DRIVE with the FUNCTION UP/DOWN key. |
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(High light) |
Remote |
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4.B. DRIVE |
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4. Change the screen colour to white with the FUNCTION -/+ key. |
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control unit |
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(Do not adjust) |
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5. Press the VIDEO/SOUND key, and memorize the respectively set values |
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Item |
Measuring |
Adjustment part |
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Description |
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instrument |
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Adjustment |
Remote |
5. BRIGHT |
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1. Receive any broadcast. |
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of |
control unit |
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2. Select 2.V/C from the SERVICE MENU. |
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SUB BRIGHT |
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3. Select 5.BRIGHT with the FUNCTION UP/DOWN key. |
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4. |
Set the initial setting value with the FUNCTION -/+ key. |
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5. |
If the brightness is not the best with the initial set value, make fine |
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adjustment until you get the best brightness. |
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6. |
Press the VIDEO/SOUND key and memorize the set value. |
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Adjustment |
Remote |
6. CONT. |
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1. Receive any broadcast. |
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of |
control unit |
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2. Select 2.V/C with the SERVICE MENU. |
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SUB CONT. |
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3. Select 6.CONT. with the FUNCTION UP/DOWN key. |
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4. |
Set the initial setting value with the FUNCTION -/+ key. |
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5. |
If the contrast is not the best with the initial set value, make fine |
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adjustment until you get the best contrast. |
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6. |
Press the VIDEO/SOUND key and memorize the set value. |
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Adlustment |
Remote |
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7. COLOUR [Method of adjustment without using measuring instrument] |
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of SUB |
control unit |
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COLOUR I |
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PAL COLOUR |
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(PAL COLOUR) |
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1. |
Receive a PAL broadcast. |
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2. |
Select 2.V/C from the SERVICE MENU. |
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3. Select 7.COLOUR with the FUNCTION UP/DOWN key. |
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4. |
Set the initial selling value for PAL COLOUR with the FUNCTION -/+ key. |
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5. |
If the colour is not the best with the initial set value, make fine |
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adjustment until you get the best colour. |
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6. Press the VIDEO/SOUND key and memorize the set value. |
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NTSC COLOUR |
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(NTSC 3.58 COLOUR) |
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7. Input NTSC 3.58MHz COMPOSITE VIDEO signal from the EXT terminal. |
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8. |
Make similar fine adjustment of NTSC3.58 COLOUR as previously. |
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(NTSC 4.43 COLOUR) |
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When NTSC 3.58 is set, NTSC 4.43 will be automatically |
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set at the same value as NTSC 3.58. |
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Adjustment |
Signal |
TP-47B |
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7. COLOUR [Method of adjustment using measuring instrument] |
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of |
generator |
TP-E |
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SUB |
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(CRT |
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PAL COLOUR (PAL COLOUR) |
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COLOUR II |
Osciiioscope |
SOCKET |
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1. Receive a PAL full field colour bar signal (75% white). |
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PWB) |
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2. Select 2.V/C from SERVICE MENU. |
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Remote |
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3. Select 7.COLOUR with the FUNCTION UP/DOWN key. |
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control unit |
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4. Set the initial setting value of PAL COLOUR with the FUNCTION -/ + key. |
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5. |
Connect the oscilloscope to TP-47B. |
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6. |
Adjust PAL COLOUR and bring the value of (A) in the illustration to |
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- 4V (W~B). |
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7. |
Press the VIDEO/SOUND key and memorize the seting value. |
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NTSC COLOUR |
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(NTSC 3.58 COLOUR) |
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1. Input NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar 75% |
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white) from the EXT terminal. |
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2. |
Set the initial setting value of NTSC3.58 COLOUR with the FUNCTION |
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-/+ key. |
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3. |
Adjust NTSC3.58 COLOUR and bring the value of (A) of the illustration |
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to 0V (W~B). |
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4. Press the VIDEO/SOUND key and memorize the set value. |
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(NTSC 4.43 COLOUR) |
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When NTSC 3.58 is set, NTSC 4.43 will be automatically |
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set at the same value as NTSC 3.58. |
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Adjustment |
Remote |
8. TINT |
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[Method of adjustment without using measuring instrument] |
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of |
control unit |
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SUB TINT I |
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NTSC TINT |
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(NTSC 3.58 TINT) |
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1. |
Input COMPOSITE VIDEO signal of NTSC 3.58MHz from the EXT |
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terminal. |
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2. |
Select 2.V/C from the SERVICE MENU. |
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3. |
Select 8.TINT with the FUNCTION UP/DOWN key. |
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4. |
Set the initial setting value of NTSC 3.58 TINT with the |
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FUNCTION -/+ key. |
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5. |
If you cannot get the best tint with the initial setting value, make fine |
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adjustment until you get the best tint. |
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6. Press the VIDEO/SOUND key and memorize the set value. |
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(NTSC 4.43 TINT) |
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When NTSC 3.58 is set, NTSC 4.43 will be automatically |
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set at the same value as NTSC 3.58. |
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Item |
Measuring |
Test point |
Adjustment |
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Description |
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Adjustment |
Signal |
TP-47B |
8. TINT |
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[Method of adjustment using measuring instrument] |
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of |
generator |
TP-E |
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SUB TINT II |
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(CRT |
NTSC TINT |
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(NTSC 3.58 TINT) |
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Oscilloscope |
SOCKET |
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1. |
Input COMPOSITE VIDEO signal (full field colour bar |
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PWB) |
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75% white) of NTSC3.S8MHz from the EXT terminal. |
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Remote |
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2. |
Select 2.V/C from the SERVICE MENU. |
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control unit |
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3. |
Select 8.TINT with the FUNCTION UP/DOWN key. |
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4. |
Set the initial setting value of NTSC 3.58 TINT with the |
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FUNCTION -/ + key. |
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5. |
Connect the oscilloscope to TP-47B. |
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6. Adjust NTSC3.58 TINT to bring the value of (A) of the |
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illustration to OV(W~Mg). |
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7. |
Press the VIDEO/SOUND key and memorize the setting value. |
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(NTSC 4.43 TINT) |
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When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the |
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same value as NTSC 3.58. |
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Adjustment |
Remote |
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9. SHARP |
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1. Receive any broadcast. |
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of SHARP |
control unit |
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2. |
Select 2. V/C from the SERVICE MENU. |
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3. |
Select 9. SHARP with the FUNCTION UP DOWN key. |
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4. |
Set the initial setting value with the function -/ + key. |
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5. |
Press the VIDEO / SOUND key and memorize the |
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setting value. |
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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.
Setting |
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(adlustment) |
Adjustment name |
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Variable |
Initial setting value |
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item |
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range |
50Hz |
60Hz |
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4:3 |
4:3 |
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1. |
V-SLOPE |
Vertical hight |
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-31~ + 32 |
-2 0 |
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(Size of bottom side of screen) |
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2. V-SHIFT |
Vertical center |
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-31~ + 32 |
+3 0 |
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3. |
V-SIZE |
Vertical hight |
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-31~ + 32 |
+ 1 |
-1 |
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4. |
H-CENT |
Horizontal center |
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-31~ + 32 |
-5 |
+ 10 |
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-5 |
-1 |
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8. |
V-S.CR |
Vertical hight correction |
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-31~ +32 |
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(Fixed) |
(Fixed) |
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Item |
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Measuring |
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Adjustment part |
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Description |
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instrument |
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1. |
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Signal |
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1. V-SLOPE |
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[(1) 50Hz 4:3] |
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Adjustment |
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generator |
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1. Receive a circle pattern signal of vertical frequency 50Hz. of |
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2. Select 4.DEF from the SERVICE MENU. |
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VERTICAL |
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Remote |
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3. Select 1 V-SLOPE with the FUNCTION UP/DOWN key. |
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SLOPE |
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control unit |
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4. Set the initial setting value of V-SLOPE (50Hz 4:3) with the FUNCTION -/+ key. |
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5. Adjust V-SLOPE and make the screen’s center line and the blanking line |
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coincide. |
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2. |
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2 V-SHIFT |
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6. Select 2.V-SHIFT and set the initial setting value. |
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Adjustment |
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7. Adjust V-SHIFT to make A =8. |
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of |
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8. Press the VIDEO/SOUND key and memorize the set value. |
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VERTICAL |
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SHIFT |
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3. |
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3. V-SIZE |
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9. Receive a cross-hatch signal. |
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Adjustment |
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10. Adjust 3.V-SIZE and set the initial setting value. |
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11. Adjust V-SIZE and make the vertical screen size 92% of the picture size. |
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VERTICAL |
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12. Press the VIDEO / SOUND key and memorize the set SIZE screen size |
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92V value. |
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Specifications / Service Adjustments / Adjustments Cont’d (1) / Adjustments Cont’d (2) / AV Selector PCB / Safety Parts
Front Control Diagram / CRT Diagram / Main Diagram 1 / Main Diagram 2
JVC AV-21SX1 EK |
3 |
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Service Adjustments Cont’d |
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Item |
Measuring |
Adjustment part |
Description |
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instrument |
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4. |
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4. H-CENT |
13.Receive a circle pattern signal. |
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Adjustment |
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14. |
Select 4.H-CENT and set the initial setting value. |
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15. Adjust H-CENT to make C=D. |
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HORI. |
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16.Press the VIDEO/SOUND key and memorize the set value. |
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CENTRE |
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8. |
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8. V-S. CR |
No alignment, but adjust this mode if result of no alignment is |
too bad. |
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Adjustment |
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17. |
Receive a cross-hatch signal. |
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of V-S. CR |
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18. |
Select 8.V-S. CR and set the initial setting values. |
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19. Adjust V-S. CR and make the gaps between the horizontal |
lines same. |
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20.Press the VIDEO/SOUND key and memorize the set values. |
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21. |
Make sure that the adjustment is properly done on the screen of (2) 60Hz 4:3. |
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CRT Diagram |
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AUDIO CIRCUIT |
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Do not touch 3.AUDIO (1. CONC LIMIT, 2. A2 ID THR) of the SERVICE MENU as it requires no adjustment.
3. AUDIO |
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Setting (adjustment) item |
Variable |
Initial setting |
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range |
value (fixed) |
1. CONG LIMIT (Do not adjust) |
00H ~ FFH |
0AH |
2. A2 ID THR (Do not adjust) |
00H ~ FFH |
19H |
Fig. 2 Service Menu Screen
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Recommended Safety Parts |
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Recommended Safety Parts Cont’d |
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Item |
Part No. |
Description |
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Item |
Part No. |
Description |
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1 |
A51EAL155X01 |
PICTURE TUBE(ITC) |
V01 (Inc.DY.&Wed) |
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IC1902 |
TLP621(D4)-LF2 |
I.C.(PH.COUPLER) |
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2 |
CELD018-005J7 |
DEGAUSSING COIL |
L01 |
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CP1901 |
ICP-N38-Y |
I.C.PROTECT |
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3 |
CM12774-A01-E |
REAR COVER |
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CP1902 |
ICP-N75-Y |
I.C.PROTECT |
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5 |
AEEMP003-185 |
POWER CORD |
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CP1903 |
ICP-N75-Y |
I.C.PROTECT |
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11 |
CM22875-007-E |
RATING LABEL (AV-21TS1 EK) |
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FR1406 |
QRH127J-1R5M |
F R 1.5 Ω |
1/2W |
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11 |
CM22875-008-E |
RATING LABEL (AV-21SX1 EK) |
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FR1552 |
QRH027K-R82M |
F R 0.82 Ω |
2W |
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12 |
CE42545-001J1 |
H.V. TRANSF. |
T1551 |
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FR1553 |
QRH127J-6R8M |
F R 6.8 Ω |
1/2W |
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100 |
CM12772-00B-E |
F.CABI ASSY (AV-21SX1 EK) |
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FR1554 |
QRZ0054-4R7M |
F R 4.7 Ω |
1/4W |
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100 |
CM12772-A0C-E |
F.CABI ASSY (AV-21TS1 EK) |
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FR1555 |
QRH027J-lR8M |
F R 1.8 Ω |
2W |
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R1585 |
QRV141F-2201AY |
MF R |
2.2k Ω |
1/4W |
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FR1556 |
QRH027J-2R2M |
F R 2 2 Ω |
2W |
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R1586 |
QRV141F-1402AY |
MF R |
14k Ω |
1/4W |
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FR1958 |
QRH017K-R56M |
F R (AV-21SX1 EK) 0.56 Ω 1W |
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R1991 |
QRZ0057-825 |
C R |
8.2M Ω |
1W |
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FR1958 |
QRH027J-IR5M |
F R (AV-21TS1 EK) |
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C1522 |
QFZ0125-952N |
MPP CAP. 9500 p F 2000V ± |
2.5% |
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FR1961 |
QRZ0054-331M |
F R 330 Ω |
1/4W |
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C1524 |
QFZ0126-404N |
MPP CAP. 0.4µ F 250V ± 2.5% |
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SK3001 |
CE42535-001J1 |
C.R.T. SOCKET |
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C1905 |
QCZ9034-472A |
C CAP. |
4700 p FAC400V |
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C8901 |
QFZ9040-474N |
M F CAP. 0.47µ FAC275V |
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C1906 |
QCZ9034-472A |
C CAP. |
4700 P FAC400V |
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C8904 |
QFZ9040-473N |
MM CAP. 0.047µ |
FAC275V |
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C1907 |
QCZ9034-472A |
C CAP. |
4700 p FAC400V |
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F8901 |
QMF51D2-3R15J1 |
FUSE |
3.15A |
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C1992 |
QCZ9041-471A |
C CAP. |
470 p FAC400V |
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LF8901 |
AEELF002-001 |
LINE FILTER |
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C1993 |
QCZ9041-332A |
C CAP. |
3300 p FAC400V |
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S8901 |
QSP4K21-C01 |
PUSH SWITCH |
MAIN POWER |
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T1551 |
CE42545-001J1 |
H.V.TRANSF. |
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TH8901 |
CEKP010-001J2 |
W.P. THERMISTOR |
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T1901 |
CET5043-002J4 |
SW REACTOR (AV-21TS1 EK) |
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CP0601 |
ICP-N10-Y |
I.C.PROTECT |
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T1901 |
CETS057-002J4 |
SW REACTOR (AV-21SX1 EK) |
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R0403 |
QRZ0054-470M |
F R 47 Ω |
1/4W |
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L1551 |
CELC901-064J6 |
HEATER CHOKE |
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R0504 |
QRZ0054-330M |
F R 33 Ω |
1/4W |
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D1901 |
D3SBA60 |
DIODE BRIDGE |
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R0509 |
QRZ0054-470M |
F R 47 Ω |
1/4W |
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Q1521 |
BU2506DX |
POWER TRANSISTOR |
H.OUT |
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Specifications / Service Adjustments / Adjustments |
Cont’d (1) / Adjustments |
Cont’d (2) / AV Selector PCB / Safety Parts |
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Front Control Diagram / CRT Diagram / Main Diagram 1 / Main Diagram 2 |
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