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PDF AV-14FM Data sheet ( Hoja de datos )

Número de pieza AV-14FM
Descripción Replacement of Memory ICs
Fabricantes JVC 
Logotipo JVC Logotipo



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AV-14FM
REPLACEMENT OF MEMORY ICs
1.MEMORY ICs
This model uses memory ICs. This memory IC data are for proper operation of the video and deflection circuits.
When replacing memory ICs, be sure to use ICs written with the initial values of data.
SERVICE MENU
2.PROCEDURE FOR REPLACING MEMORY ICs
(1) Power off
Switch the power off and disconnect the power plug from the wall
1.IF
3.DEF
SERVICE MENU
2.V/C
4.VSM PRESET
outlet.
(2) Replace ICs
5.PRESET
6.TURBO TIMER OFF
Be sure to use memory ICs written with the initial data values.
1-6 SELECT
DISP : EXIT
(3) Power on
***********
**.****
Connect the power plug into the wall outlet and switch the power on.
(4) Check and set SYSTEM CONSTANT SET
It must not adjust without adjustment signals.
m1) Press the DISPLAY key and the PICTURE MODE key of the
oREMOTE CONTROL UNIT simultaneously.
2) The SERVICE MENU screen of Fig. 1 will be displayed.
.c3) While the SERVICE MENU is displayed, again press the DISPLAY
key and PICTURE MODE key simultaneously, and the SYSTEM
CONSTANT SET screen of Fig. 2 will be displayed.
U4) Check the setting values of the SYSTEM CONSTANT SET of Table
1. If the value is different, select the setting item with the MENU /
t4key, and set the correct value with the MENU - / + key.
5) Press the DISPLAY key twice, and return to the normal screen.
e(5) Receive channel of setting
Refer to the OPERATING INSTRUCTIONS and set the receive
echannels (channels preset) as described
h(6) User Setting
Check the user setting value of Table 2, and if setting value is different,
Sset the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.
ta(7) Setting of SERVICE MENU
Verify the setting items of the SERVICE MENU of Table 3, and reset
awhere necessary.
For setting, refer to the SERVICE ADJUSTMENTS.
.DNAME OF REMOTE CONTROL KEY
ww PICTURE
w MODE
*** ** **** ***
Fig.1
SYSTEM CONSTANT-
SYSTEM CONSTANT SET
1
COLOUR
BILINGUAL
TUNER
ECO SENSOR
LANGUAGE
: MULTI.
: NO
: MU
: YES
: E/R/A/F
: SELECT
: OPERATE
DISP : EXIT
SYSTEM CONSTANT-
SYSTEM CONSTANT SET
B/B SOUND
LOCK
COLOUR AUTO
QSS
ALC
TEXT RATE
: OFF
: 180
: NO
: MINT
: NO
: 20
2
:SEL
:OPE DISP:EXIT
SYSTEM CONSTANT-
SYSTEM CONSTANT SET
AMP TUNER
: NO
3
DISPLAY
MENU
-/+
MENU
▼/▲
:SEL
:OPE DISP:EXIT
Fig.2
8 No. 51753

1 page




AV-14FM pdf
AV-14FM
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 way 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. Make sure that connection is correctly made to AC power
source.
4. Turn on the power of the TV and measuring equipment for
warming up for at least 30 minutes before staring adjustment.
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.
7. Preparation for adjustment (presetting):
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
PICTURE MODE (VSM)
TINT / COLOUR / BRIGHT /
CONT / SHARP
ECO SENSOR
VNR
BLUE BACK
BRIGHT
Refer to VSM PRESET on
page 25.
OFF
OFF
OFF
MEASUREMENT INSTRUMENT
AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL / SECAM / NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
Adjustment item
B1 POWER SUPPLY
FOCUS adjustment
IF circuit adjustment
VIDEO/CHROMA circuit
adjustment
Adjustment item
DEFLECTION circuit
adjustment
VSM PRESET adjustment
PRESET adjustment
PURITY / CONVERGENCE
Adjustment
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 items of settings :
" 1. IF ・・・・・・・・・・・・・・・・・・・・・・
" 2. V/C ・・・・・・・・・・・・・・・・・・・・
" 3. DEF・・・・・・・・・・・・・・・・・・・・・・
" 4. VSM PRESET ・・・・・・・・・・・・・
" 5. PRESET ・・・・・・・・・・・・・・・・・・
" 6. TURBO TIMER ・・・・・・・・・・・・
For entering/adjusting the setting values (adjustment values) of the IF circuit.
For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA circuit.
For entering / adjusting the setting values (adjustment values)#of the DEFLECTION circuit.
For setting the values of BRIGHT, STANDARD, and SOFT.
(VSM : video status memory)
This is used when the PRESET MODE is adjusted. [Do not adjust]
For quick setting the values of TIMER COUNT-adjustable not only by minutes but also by second.
If it is on, the time in TIMER mode changes from 1 minute into 1 second temporarily.
If you turn the TV power off, this setting becomes OFF automatically. (applicable to OFF TIMER,
ON TIMER, AUTO SHUTOFF). [Should be OFF]
12 No. 51753

5 Page





AV-14FM arduino
AV-14FM
Item
Measuring
instrument
Test point
Adjustment part
Description
Adjustment
of WHITE
BALANCE
(Low light)
Signal
generator
Remote
control unit
1. CUT OFF (R)
CUT OFF (G)
CUT OFF (B)
SCREEN VR
[IN HVT]
V/C
1. CUTOFF
50Hz
/ :SELECT
- / + : OPERATE
PAL
(R) * **
(G) * **
(B) * **
DISP : EXIT
1. Receive a black and white signal (colour off).
2. From the SERVICE MENU, select 2. V/C to display 1. CUT OFF
(R), (G) and (B) .
3. Set each value to initial setting value with 49 keys of the
remote control unit.
4. Press the 1 key of the remote control unit to show the single
horizontal line on screen.
5. Turn the SCREEN VR fully counter-clockwise, then slowly turn it
clockwise to where one of a red, blue or green colour is faintly
visible.
6. Use keys 49 of the remote control unit and adjust the other 2
colours which except the appeared colour to where the single
horizontal line appears white.
7. Turn the SCREEN VR to where the single horizontal line glows
faintly.
8. Press the 2 key to turn off the single horizontal line.
9. Press the DISPLAY key twice to return to the normal screen.
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
H.LINE OFF
12 3
H.LINE ON
G. CUTOFF()
R. CUTOFF( )
4
5
6 B. CUTOFF( )
R. DRIVE()
B. DRIVE()
R. CUTOFF( )
7
8
9
B. CUTOFF( )
R. DRIVE( )
B. DRIVE( )
G. CUTOFF( )
RG B
Adjustment item
1. CUT OFF
R
G
B
Variable
range
-128+127
-128+127
-128+127
Initial setting
value
-50
-50
-50
Adjustment
of WHITE
BALANCE
(High light)
Signal
generator
Remote
control unit
2. DRIVE (R)
DRIVE (B)
1. Receive a black and white signal (colour off).
2. Select 2. V/C from the SERVICE MENU.
3. Select 2. DRIVE (R) / (B) with MENU /key, and set each
value to initial setting value with 4 and 7 or 6 and 9 keys of the
remote control unit.
4. Use the keys 4 and 7 or 6 and 9 to produce a white screen
5. Press the DISPLAY key twice to return to the nomal screen.
V/C
2. DRIVE
50Hz
/ :SELECT
- / + : OPERATE
PAL
(R) * **
(B) * **
DISP : EXIT
Adjustment item
2. DRIVE
R
B
Variable
range
-64+63
-64+63
Initial setting
value
+0
+0
18 No. 51753

11 Page







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