JVC AV-21L41/BK User manual

No. 51859
Oct. 2001
A
V-21L41
1COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
AV-21L41/BK
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 3
!FEATURES････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･
･･････
･･･ 4
!FUNCTIONS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･
････
･･ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････
･･････････････････････････
･････････････ 7
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････
･･････････････････････････････････････････
･････････････････････ 14
!PARTS LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･
･･
･31
★
OPERATING INSTRUCTIONS
★
STANDARD CIRCUIT DIAGRAM ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････
････････････････････････････････
････････････････ 2-1
SERVICE MANUAL
COLOUR FLAT TELEVISION
BASIC CHASSIS
CG-F

No. 51859
A
V-21L41
2
SPECIFICATIONS
ITEM CONTENT
Dimensions(W×H×D) 598mm×468mm×471.5mm
Mass 24kg
TV RF System B/G, I, D/K
RF Mode PAL / SECAM
Colour System VIDEO
Mode PAL / SECAM / NTSC3.58 / NTSC4.43
Sound System A2(Bilingual) system
Receiving Frequency VHF (VL) 46.25MHz～168.25MHz
VHF (VH) 175.25MHz～463.25MHz
UHF 471.25MHz～863.25MHz
CATV Cable TVs of Mid (X-Z, S1-S10)Super (S11-S20) & Hyper (S21-S41) bands receivable
VIF Carrier 38.0MHz
Intermediate
Frequency SIF Carrier 32.5MHz(5.5MHz)/33.5MHz (4.5MHz)
31.5MHz (6.5MHz)
Colour Sub Carrier Frequency PAL (4.43MHz),
SECAM (4.40625MHz / 4.25MHz)
NTSC (3.58MHz / 4.43MHz)
AC110～240V, 50 / 60Hz
Power Input Rated Voltage
Operating Voltage AC90～260V, 50 / 60Hz
Power Consumption 105W (Max) 68W(Avg)
Picture Tube Visible size: 51cm measured diagonally
High Voltage 26.5kV±1.5kV(at zero beam current)
Speaker 5cm×12 cm, Oval type×2
Audio Output 5W (monaural,Bilingual)
Aerial Input Terminal 75ΩUnbalanced
Input Video 1V(p-p), 75Ω(Front / Rear)
Audio 500mV(rms) (-4dBs), High impedance, (Front / Rear)
Output Video 1V(p-p), 75Ω(Rear)
Audio 500mV(rms) (-4dBs), Low impedance,(Rear)
Headphone jack 3.5mm mini jack
Remote Control Unit RM-C365GY
(Battery size : AA / R06 / UM-3×2)
Design and specifications are subject to change without notice.

No. 51859
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V-21L41
4
FEATURES
"New chassis design enables use of an interactive on-screen control.
"Wide range voltage (110V～240V) AC power input.
"With AUDIO / VIDEO INPUT & OUTPUT terminal.
"MUTING button can reduce the audio level to zero instantly.
"Functional remote control to operate TV set (for channel select, volume control, power ON/OFF, etc.) from a distance.
"I
2C bus control utilizes single chip ICs for IF, V/C, DEF. VSM PRESET, PRESET & TURBO TIMER.
"By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically.
"The sound system has a built-in A2bilingual system
"Built-in AI ECO (ECONOMY, ECOLOGY) sensor.
In accordance with the brightness in a room, the brightness and / of contrast of the picture can be adjusted automatically to make the
optimum picture which is easy on the eye.
"Built – in ON TIMER, RETURN + & CHILD LOCK.
SYSTEM BLOCK DIAGRAM
IC301
VIDEO/CHROMA
DECORDER
IC702
MEMORY
TU001
TUNER
IC701
MICRO
COMPUTER SCL1/SDA1
SCL2/SDA2

No. 51859
A
V-21L41
5
FUNCTIONS
■
FRONT PANEL
■
REAR TERMINAL
①ANT Terminal
②VIDEO INPUT Terminal
③VIDEO OUTPUT Terminal
④AUDIO INPUT Terminal
⑤AUDIO OUT PUT Terminal
▼
①MENU buttons
②CHANNEL －/＋buttons
③VOLUME －/＋(/EXT) buttons
④ECO sensor
⑤REMOTE CONTROL sensor
⑥ON TIMER lamp
⑦POWER lamp
⑧MAIN POWER button
⑨A/V INPUT terminal
⑩HEADPHONE jack
18
2 3 456 7
9
10
1
2
4
5
3

No. 51859
A
V-21L41
6
■
REMOTE CONTROL UNIT(RM-C365)
①ECO SENSOR key
②SOUND SYSTEM key
③COLOUR SYSTEM key
④TV/VIDEO key
⑤OFF TIMER key
⑥CHANNEL SCAN key
⑦RETURN key
⑧DISPLAY key
⑨CHANNEL－/＋key
⑩POWER key
⑪PICTURE MODE key
⑫Number (CH.) key
⑬－/－－key
⑭MUTING key
⑮MENU key
MENU ▲/▼key
MENU －/＋key
⑯VOLUME－/＋key
⑰Ⅰ/Ⅱkey
+

No. 51859
A
V-21L41
9
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.
2. PROCEDURE FOR REPLACING MEMORY ICs
(1) Power off
Switch the power off and disconnect the power plug from the wall outlet.
(2) Replace ICs
Be sure to use memory ICs written with the initial data values.
(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.
1) Press the DISPLAY key and the PICTURE MODE key of the REMOTE
CONTROL UNIT simultaneously.
2) The SERVICE MENU screen of Fig. 1 will be displayed.
3) 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.
4) Check the setting values of the SYSTEM CONSTANT SET of Table 1 If the
value is different, select the setting item with the MENU ▼/▲key, and set
the correct value with the MENU - / + key.
5) Press the
DISPLAY key twice, and return to the normal screen.
(5) Receive channel of setting
Refer to the OPERATING INSTRUCTIONS and set the receive channels
(channels preset) as described
(6) User Setting
Check the user setting value of Table 2, and if setting value is different, set
the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.
(7) Setting of SERVICE MENU
Verify the setting items of the SERVICE MENU of Table 3, and reset where
necessary.
For setting, refer to the SERVICE ADJUSTMENTS.
NOTE
Both MENU -/+ Key and MENU / key have the same functions.
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.TURBO TIMER OFF
1-6 SELECT DISP : EXIT
******
************
***********
**********
***** **
****
**
.
***
******
***
*** ** **
*** ** ***** ** **
*** ** **** ***
** ***** ***
** ***
Fig.1
Fig.2
SYSTEM CONSTANT-Ⅰ
ⅠⅠ
Ⅰ
COLOUR
COLOURCOLOUR
COLOUR :
::
: *****
**********
*****
BILINGUAL
BILINGUALBILINGUAL
BILINGUAL : ***
: ***: ***
: ***
TUNER
TUNERTUNER
TUNER :
::
: **
****
**
ECO SENSOR
ECO SENSORECO SENSOR
ECO SENSOR : YES
: YES: YES
: YES
LANGUAGE
LANGUAGELANGUAGE
LANGUAGE : E/R/A/F
: E/R/A/F: E/R/A/F
: E/R/A/F
: SELECT
: OPERATE DISP : EXIT
SYSTEM CONSTANT SET 1
SYSTEM CONSTANT-Ⅱ
ⅡⅡ
Ⅱ
B/B SOUND : NO
LOCK : 20
COLOUR AUTO : YES
QSS : MQSS
ALC : NO
TEXT RATE : 20
SYSTEM CONSTANT SET 2
:SEL
:OPE DISP:EXIT
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
MENU
▼/▲key
MENU
－/＋key
DISPLAY key
PICTURE
MODE key
NUMBERS
key

No. 51859
A
V-21L41
10
SETTING OF SYSTEM CONSTANT SET
Setting item Setting contents Setting value
COLOUR TRIPLE
BILINGUAL YES
TUNER MU
ECO SENSOR YES
LANGUAGE E/T
B/B SOUND NO
LOCK YES 10 20 ～230 240 250 20
COLOUR AUTO NO
QSS MINT
ALC NO
TEXT RATE 10 20 40 80 20
Table 1
USER SETTING VALUES
Setting item Setting value Setting item Setting value
MAIN POWER SW OFF PICTURE MODE (VSM) BRIGHT
SUB POWER ON LANGUAGE THAI
CHANNEL POSITION 1 POSITION CHANNEL PRESET Refer to OPERATING INSTRUCTION
VOLUME About 10 ECO SENSOR OFF
TV/VIDEO TV VNR OFF
ON SCREEN DISPLAY POSITION INDICATION AUTO SHUTOFF OFF
COLOUR SYSTEM PAL ON TIMER PR1 0:00
SOUND SYSTEM B / G BLUE BACK OFF
OFF TIMER OFF ( shown : 00 ) CHILD LOCK OFF
BILINGUAL Ⅰ
ⅠⅠ
Ⅰ(Ⅰ
ⅠⅠ
Ⅰ/Ⅱ
ⅡⅡ
Ⅱ)
Table 2
MULTI PAL
TRIPLE
YES NO
MU MA
YES NO
E/T E
ON OFF
YES NO
MINT MQSS
YES NO

No. 51859
A
V-21L41
11
INITIAL SETTING VALUE OF SERVICE MENU
1. Adjustment of the SERVICE MENU is made on the basis of the initial setting values ; however, the new setting values which
set the screen in its optimum condition may differ from the initial setting.
2. Do not change the initial Setting Values of the Setting (Adjustment) items not listed In “ADJUSTMENT”.
2. V/C
Initial setting value
Colour system
Setting item Variable range PAL SECAM NTSC 3.58 NTSC 4.43
RED
GREEN
1. CUT OFF
BLUE
-128～+127 -50
RED
2. DRIVE BLUE -128～+127 + 0
3. BRIGHT -127～+127 + 0
4. CONT. -63～+63 + 0
5. COLOUR -63～+63 + 0 + 0
TV + 0 + 0
MU
6. TINT VIDEO -63～+63 + 8 + 0
7. SECAM BL ADJ. -31～+31 +0
TV -7(Fixed)
8. SHARP(Do Not Adj.) VIDEO -32～+31 +15(Fixed)
9. AMP T.SHARP -12
3. DEFLECTION
Initial setting value
Setting item Variable range fv : 50Hz MODE fv : 60Hz MODE
1. VER. POSITION -04 ～+03 - 1 - 3
2. HOR. POSITION -16 ～+15 + 3 + 3
3. VER. HEIGHT -64 ～+63 -35 + 1
4. VER. LINEARITY -32 ～+31 +15 - 1
5. VER. SCURVE -32 ～+31 -32 + 0
6. HOR. VCO ADJUST -63 ～+62 + 0 + 0
4. VSM PRESET
VSM preset
VSM mode
Setting item BRIGHT STANDARD SOFT
TINT SETTING VALUE +15
COLOUR SETTING VALUE +15
BRIGHT SETTING VALUE +15
CONT. SETTING VALUE +30 +19 +14
SHARP SETTING VALUE +20 +15

No. 51859
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V-21L41
12
5. PRESET
The items in the following table, it is no requirement for adjustment.
If values had changed by the miss operation, set the initial setting values in the following table.
Colour System (Do Not Adjust)
Initial setting value (Fixed value)
Setting item PAL SECAM NTSC 3.58 NTSC 4.43
1. C TRAP FIX 111 1
2. SHARP PEAK 000 0
3. ABL 111 1
4. GAMMA 000 0
TV 022 3
5. Y. DELAY TIME VIDEO 020 2
6. BLACK EXP START ＋3＋3＋3＋3
TV 110 0
7. C-BPF VIDEO 111 1
8. CW / SCP 000 0
9. VIF DET LEVEL 000 0
11. IF AGC MIN 000 0
12. VIF AGC 000 0
13. VIF PMOD 000 0
19. VNR 15 15 15 15
20. RGB LIM 111 1
21. RGB LIMIT LEVEL 222 2
23. TEXT H. POSITION -3 -3 -3 -3
24. READ DATA
Sound System (Do Not Adjust)
Setting item B/G I D/K M
10. SIF DET LEVEL ＋0＋0＋0＋0
14. SIF BPF BW ADJUST 0 (-) 0 (-) 0 (-) 0 (-)
15. SIF TRAP FO ADJUST 0 (-) 0 (-) 0 (-) 0 (-)
16. SIF TRAP FO ADJUST 2 0 (-) 0 (-) 0 (-) 0 (-)
17. SIF -TRAP 000 0
18. SIF -BPF 000 1
22. SIF SW 111 0

No. 51859
A
V-21L41
13
REPLACEMENT OF IC301 (IF V/C DECODER)
"For the IC301(IF V/C DECODER) of this model, all data are written in the micro-computer. So, write the data in the micro-
computer in accordance with the following procedures before starting adjustment.
REPLACING PROCEDURES
(1) Turn the POWER OFF.
(2) Replace the IC301 with a new one.
(3) While pressing MENU button and VOL+ button ON the FRONT Panel simultaneously, turn the POWER ON. When the POWER is turned
ON, the data is written in the micro-computer immediately.
LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS
1 MENU buttons
2 CHANNEL ∨/∧buttons
(MENU ∨/∧buttons)
3 VOLUME －/＋buttons
(MENU －/＋buttons)
4 ECO sensor
5 REMOTE CONTROL sensor
6 ON TIMER lamp
7 POWER lamp
8 MAIN POWER button
182 3 4 5 6 7

No. 51859
A
V-21L41
14
SERVICE ADJUSTMENT
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 adjustment with the REMOTE CONTROL UNIT is made
on the basis of the initial setting values. The setting values
which adjust the screen to its optimum condition may differ
from the initial setting values.
3. Make sure that connection is correctly made to AC power
source.
4. Turn on the power of the set and equipment before use, and
start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception
or input signal for adjustment.
6. Never touch any adjustment parts, which are not specified
in the list for this adjustment VRs, transforms, condensers,
etc.
7. Preparation for adjustment
Unless otherwise specified in the adjustment instructions, preset
the following functions with the REMOTE CONTROL UNIT.
User mode position
PICTURE MODE (VSM) BRIGHT
VNR OFF
COLOUR / BRIGHT
CONT. / SHARP Refer to VSM PRESET
BLUE BACK OFF
OFF TIMER OFF
ECO SENSOR OFF
AUTO SHUT OFF OFF
MEASURING 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 Adjustment item
B1 POWER SUPPLY DEF. circuit adjustment
FOCUS adjustment VSM PRESET setting
IF circuit adjustment PURITY / CONVERGENCE adjustment
V/C (Video / Chroma) circuit
adjustment

No. 51859
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15
BASIC OPERATION OF SERVICE MENU
"The adjustment using SERVICE MENU
The following adjustment items use the SERVICE MENU in the series of the adjustment. The adjustments are made on the basis of the
initial setting values. The adjustment values which adjust the screen to the optimum condition can be different from the initial setting values.
With the SERVICE MENU, various settings can be made, and they are broadly classified in the following items of settings.
1.IF････････････････････････ Adjustment of the IF circuits.
2.V/C ･･････････････････････ Adjustment of the VIDEO/CHROMA circuit.
3.DEF ･････････････････････ Adjustment of the DEFLECTION circuit.
4.VSM PRESET･････････････ Adjustment of the initial setting values of VSM condition as STANDARD, SOFT and BRIGHT.
(VSM : Video Status Memory)
5.PRESET ･････････････････ Adjustment of the RF circuit [Do not adjust].
6.TURBO TIMER････････････ For quick setting the TIMER count value, adjustable not only by minuets but also by second.
[Should be OFF].
"Key operation of the SERVICE MENU
[Enter to SERVICE MENU]
Press the DISPLAY key and the PICTURE MODE key of the REMOTE CONTROL
UNIT simultaneously. Then enter the SERVICE MENU mode as shown in Fig.1.
[Exit from SERVICE MENU]
When complete the adjustment work, press the DISPLAY key to return to the
SERVICE MENU.
And then press the DISPLAY key again, return to the normal screen.
[Select from SERVICE MENU]
In SERVICE MENU, press the number (1～6) key of the remote control unit, to select
any of the adjustment items.
SERVICE MENU
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.TURBO TIMER OFF
1-6 SELECT DISP : EXIT
******
************
***********
**********
***** **
****
**
.
***
******
***
*** ** **
*** ** ***** ** **
*** ** **** ***
** ***** ***
** ***
Fig.1
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
MENU
▼/▲key
MENU
－/＋key
DISPLAY key
PICTURE
MODE key
NUMBERS
key

No. 51859
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V-21L41
16
[Method of setting]
1. IF
[1. VCO]
①1 Key･････････････････････････ Select 1.IF.
②1 Key･････････････････････････ Select 1.VCO
③The VCO (CW) screen will be displayed a allow mark when the AFC voltage is at a certain level.
④DISPLAY Key ･････････････････ When this is press twice, you will return to the SERVICE MENU.
[2. DELAY POINT]
①1 Key･････････････････････････ Select 1.IF.
②2 Key･････････････････････････ Select 2.DELAY POINT.
③MENU -/+･････････････････････ Set (adjust) the setting values of the setting items.
④DISPLAY Key ･････････････････ When this is pressed, you will return to the SERVICE MENU.
2.V/C, 3.DEF
and 4.VSM PRESET
①2~4Key ･･･････････････････････ Select one from 2. V/C, 3. DEF and 4. VSM PRESET.
②MENU ▼/▲Key ･･････････････ Select setting items.
③MENU -/+ ･････････････････････ Adjust the values of the items.
④DISPLAY Key･･････････････････ When this is pressed, return to the SERVICE MENU.
6.TURBO TIMER
①
By pressing the 6 key, you can change the ON or OFF ( should be OFF).
(Should be OFF)
%If it is ON, the timer in TIMER mode changes from 1 minute into 1 sec temporarily.
(It is easier to checks the Operation of TIMER)
If you turn the TV power off, this setting becomes OFF automatically.

No. 51859
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V-21L41
17
SERVICE MENU FLOW CHART
SERVICE MENU
IF
1. VCO
2. DELAY POINT
1-2 : SELECT DISP : EXIT
SUB MENU 1. IF
VCO
(
CW
)
***.**
MHz
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
AFT ADJUST
***(**)
***(**)***(**)
***(**)
VCO ADJUST
***(**)
***(**)***(**)
***(**)
FINE
DISP : EXIT
DELAY POINT UHF
AGC TAKE-OVER
**
- / + : OPERATE DISP : EXIT
6.TURBO TIMER
ON/
OFF
(By pressing 6-key)
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.TURBO TIMER OFF
1-6 SELECT DISP : EXIT
******
************
****** *****
**********
***** **
****
**
.
***
******
***
*** ** **
*** ** ***** ** **
*** ** ** ** ***
** ***** ***
** ***
OFF
V/C PAL
1. CUTOFF
- / + : OPERATE DISP : EXIT
(
R
)
* **
(
G
)
* **
(
B
)
* **
50Hz
SUB MENU 2. V/C
/ :SELECT
DEF
- / + : OPERATE DISP : EXIT
***
SUB MENU 3. DEF
/ :SELECT
50Hz
1. VER. POSITION PAL
PRESET
1. C-TRAP FIX
- / + : OPERATE DISP : EXIT
***
50Hz
SUB MENU 5. PRESET
/ :SELECT B/G
PAL
BRIGHT
TINT
COLOUR
BRIGHT
CONT.
SHARP
- / + : OPERATE DISP : EXIT
**
**
**
**
**
SUB MENU 4. VSM PRESET
/ :SELECT

No. 51859
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18
ADJUSTMENT LOCATIONS
S
1Pin TP-91
(
B1
)
2Pin NC
3Pin X-ra
y
1
4Pin X-ra
y
2
5Pin TP-E
(
)
HVT
S
1
HV
U
IC301
MEMORY IC
IC702
IC701
F901
DEG
TU001
FRONT
TOP
MAIN PWB
CRT SOCKET PWB
(
SOLDER SIDE
)
TP-47G/R
E1
U
T
PW
UPPER:FOCUS
LOWER:SCREEN
TP-47R/G
TP-47B
TP-E
T
CRT EARTH WIRE
(BRAIDED ASS'Y)
A/V INPUT Headphone
ANT. Terminal
A/V IN&OUTPUT
Terminal
POWER
SW

No. 51859
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19
ADJUSTMENTS
B1 POWER SUPPLY
Item Measuring
instrument Test point Adjustment part Description
Check of
B1 Power
Supply
Signal
generator
DC Volt-
meter
TP-91 (B1)
TP-E (#
##
#)1. Input a whole black signal.
2. Connect a DC voltmeter to TP-91(B1) and TP-E (#).
3. Make sure that the voltage is DC114.5±1.5V.
FOCUS ADJUSTMENT
Item Measuring
instrument Test point Adjustment part Description
Adjustment
of FOCUS Signal generator FOCUS VR
[In HVT] 1. Input 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
Item Measuring
instrument Test point Adjustment part Description
●Please use signal generator which is correct proof about the
sending frequency.
Adjustment
of VCO(CW) Signal generator
Remote
control unit
1. VCO
1. Input the PAL full colour bar (210.25MHz) signal.
2. Select 1.IF from the SERVICE MENU.
3. Press 1 key and select 1.VCO.
4. Select VCO ADJUST with MENU ▲/▼key.
5. Press MENU -/+ key until the colour of the characters TOO
HIGH changes blue to yellow. Then gradually press the MENU
-/+ key until the TOO LOW changes yellow. At this time, confirm
that the value of VCO ADJUST is near +00.
6. Select AFT ADJUST with MENU ▲/▼key.
7. Press MENU -/+ key until the characters JUST REFERENCE
changes blue to yellow.
8. Press the DISPLAY key three times to return to normal screen.
VCO (CW)
***.**
MHz
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
AFT ADJUST
***(**)
***(**)***(**)
***(**)
VCO ADJUST
***(**)
***(**)***(**)
***(**)
FINE
DISP : EXIT
YELLOW
Do not ad
j
ust
ADJUSTMENT AT THIS POINT IS USELESS
ABOVEREFERENCE
TOO HIGH
BELOW REFERENCE
JUST REFERENCE
TOO LOW
ADJUSTMENT POINT

No. 51859
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20
Item Measuring
instrument Test point Adjustment part Description
Adjustment
of DELAY
POINT
(AGC)
Signal
generator
Remote
control unit
DELAY POINT
(AGC TAKE-OVER)
1. Input a black and white signal (colour off).
2. Select 1. IF from the SERVICE MENU.
3. Select 2. DELAY POINT by pressing the 2key on the remote
control unit.
4. Set the setting values of the setting items as shown bellow
tabbe.
5. Then adjust the MENU - or + key until video noise disappears.
6. Turn to other channels and make sure that there are no
irregularities.
Setting Item Variable range Initial setting value
MU
NTSC 3.58 48
DELAY POINT
(AGC TAKE OVER) OTHER
0～127
43
DELAY POINT UHF
AGC TAKE-OVER
**
- / + : OPERATE DISP : EXIT

No. 51859
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21
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.
Do not change the initial setting values of the setting items not listed in “ADJUSTMENT”.
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]
1. Input a black and white signal (colour off).
2. Select 2. V/C from the SERVICE MENU, then select 1. CUT
OFF (R), (G) and (B) .
3. Set each value to initial setting value with 4～9 keys of the
remote control unit.
4. Press the 1key of the remote control unit to show the single
horizontal line on screen.
5. Turn the SCREEN VR fully counter-clockwise, thenslowly turn it
clockwise to where one of a red, blue or green colour is faintly
visible.
6. Use keys 4～9of 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 2key to turn off the single horizontal line.
9. Press the DISPLAY key twice to return to the normal screen.
Adjustment
of WHITE
BALANCE
(High light)
Signal
generator
Remote
control unit
2. DRIVE
(R)
DRIVE (B) 1. Input 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 4and 7 or 6and 9to produce a white screen
5. Press the DISPLAY key twice to return to the nomal screen.
Adjustment item Variable
range Initial setting value
R-128～+127 -50
G-128～+127 -50
1. CUT OFF
B-128～+127 -50
Adjustment item Variable
range Initial setting value
R-128～+127 +0
2. DRIVE B-128～+127 +0
V/C PAL
1. CUTOFF
- / + : OPERATE DISP : EXIT
(
R
)
* **
(
G
)
* **
(
B
)
* **
50Hz
/ :SELECT
123
456
789
CUTOFF ON
(
H.LINE ON
)
CUTOFF OFF
(
H.LINE OFF
)
R. CUTOFF
(
)
▲
R. DRIVE
(
)
R. CUTOFF
(
)
R. DRIVE
(
)
▼
RGB
G.CUTOFF
(
)
▲
B. CUTOFF
(
)
▲
B. DRIVE
(
)
▲
▲
B. CUTOFF
(
)
B. DRIVE
(
)
G.CUTOFF
(
)
▼
▲
▲
▲
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
V/C PAL
2. DRIVE
- / + : OPERATE DISP : EXIT
(
R
)
* **
(
B
)
* **
50Hz
/ :SELECT

No. 51859
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22
Item Measuring
instrument Test point Adjustment part Description
Adjustment
of
SUB BRIGHT
Remote
control unit 3. BRIGHT 1. Receive any broadcast.
2. Select 2. V/C from SERVICE MENU.
3. Select 3. BRIGHT with the MENU ▼/▲key.
4. Set the initial setting value with the MENU - or + key.
5. If the brightness is not the best with the initial set value, make
fine adjustment until you get the best brightness.
Adjustment
of
SUB CONT.
Remote
control unit 4. CONT. 1. Receive any broadcast.
2. Select 2. V/C from SERVICE MENU.
3. Select 4. CONT. with the MENU ▼/▲key.
4. Set the initial setting value with the MENU - or + key.
5. If the contrast is not the best with the initial set value, make fine
adjustment until you get the best contrast.
5. COLOUR [Method of adjustment without measuring instrument]
PAL COLOUR 1. Receive a PAL broadcast.
2. Select
2. V/C from the SERVICE MENU.
3. Select
5. COLOUR with the MENU ▼/▲key.
4. Set the initial setting value for PAL COLOUR with the MENU -
or + key.
5. If the colour is not the best with the initial set value, make fine
adjustment until you get the best colour.
SECAM COLOUR 1. Receive a SECAM broadcast.
2. Make fine adjustment of SECAM COLOUR as previously.
NTSC 3.58 COLOUR 1. Receive a NTSC 3.58MHz broadcast.
2. Make similar fine adjustment of NTSC 3.58 COLOUR as
previously.
Adjustment
of
SUB
COLOUR Ⅰ
ⅠⅠ
Ⅰ
Remote
control unit
NTSC 4.43 COLOUR When NTSC 3.58 adjustment completed, NTSC 4.43 will be
automatically set at the respective values.

No. 51859
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V-21L41
23
Item Measuring
instrument Test point Adjustment part Description
5. COLOUR [Method of adjustment using measuring instrument]
PAL COLOUR 1. Input a PAL full field colour bar signal (75% white).
2. Select 2. V/C from SERVICE MENU.
3. Select 5. COLOUR with the MENU ▼/▲key.
4. Set the initial setting value of PAL COLOUR with the MENU
- or + key.
5. Connect the oscilloscope between TP-47G/R and TP-E (#).
6. Adjust PAL COLOUR to bring the value of (A) in the illustration
to +9V(W-G). (Voltage value between (W) and (G))
SECAM COLOUR 1. Input a SECAM full field colour bar signal (75% white).
2. Set the initial setting value of SECAM COLOUR with the MENU
- or + key.
3. Adjust SECAM COLOUR to bring the value of (A) in the
illustration to +6V(W-G). (Voltage value between (W) and (G))
NTSC 3.58 COLOUR 1. Input a NTSC 3.58 full field colour bar signal (75% white).
2. Set the initial setting value of NTSC 3.58 COLOUR with the
MENU - or + key.
3. Adjust NTSC 3.58 COLOUR to bring the value of (A) in the
illustration to +8V(W-G). (Voltage value between (W) and (G))
Adjustment
of SUB
COLOUR Ⅱ
ⅡⅡ
Ⅱ
Signal
generator
Oscillo-
scope
Remote
control unit
TP-47G/R
TP-E (#
##
#)
[CRT SOCKET
PWB]
NTSC 4.43 COLOUR When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the
respective values.
W
YCy
G
Mg RB
(A)
0V
(－)
(＋)