JVC AV-14AM User manual

No.56091
Sep. 2000
A
V-14AM
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
AV-14AM
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･････････････････････････････
････････････････････････････････････････････････････････････
･･････････････････････････････ 2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････
････････････････････････････････････････････････
････････････････････････ 3
!FEATURES････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････
････････
････ 4
!FUNCTIONS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･
･･････
･･･ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･････････････
････････････････････････････
･･････････････ 6
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･････････････････････
････････････････････････････････････････････
･･････････････････････ 12
★
STANDARD CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･････
････････････
･･････2-1
!PARTS LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･
････
･･ 31
BASIC CHASSIS
CG
SERVICE MANUAL
COLOUR TELEVISION

No. 56091
A
V-14AM
2
SPECIFICATIONS
ITEM CONTENT
Dimensions(W×H×D)
Mass 364mm×340.5mm×375mm
9.9kg
TV RF System B / G, I, D / K1, M
RF Mode PAL / SECAM / NTSC3.58 / NTSC4.43
Colour System VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43
Picture Tube Visible size : 34cm measured diagonally
High Voltage 22.5kV±1.5kV(at zero beam current)
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)
32.0MHz (6.0MHz)
Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.40625MHz / 4.25MHz)
NTSC (3.58MHz / 4.43MHz)
Power Input AC110～240V, 50 / 60Hz
Power Consumption 70W (Max.) / 47W (Avg.)
Speaker 8cm Round type×1
Audio Output 3W (monaural)
Aerial Input Terminal 75ΩUnbalanced
Input Video 1V(p-p), 75Ω, RCA×2 (Front / Rear)
(Front / Rear, Bridged connection) Audio 500mV(rms) (-4dBs), High impedance, RCA×2 (Front / Rear)
Output Video 1V(p-p), 75Ω, RCA×1
Audio 500mV(rms) (-4dBs), Low impedance, RCA×1
Remote Control Unit RM-C360-1H(Battery size : AA / R06 / UM-3×2)
Headphone jack 3.5mm stereo mini jack(Sound is monaural)
Design & specifications are subject to change without notice.

No.56091
A
V-14AM
3
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the original
circuits. Service should be performed by qualified personnel
only.
2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer
of responsibility for personal injury or property damage resulting
therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts which have these special safety characteristics are
identified in the parts list of Service manual. Electrical
components having such features are identified by shading
on the schematics and by (!
!!
!) on the parts list in Service
manual. The use of a substitute replacement which does not
have the same safety characteristics as the recommended
replacement part shown in the parts list of Service manual may
cause shock, fire, or other hazards.
4. Don't short between the LIVE side ground and ISOLATED
(NEUTRAL) side ground or EARTH side ground when
repairing.
Some model's power circuit is partly different in the GND. The
difference of the GND is shown by the LIVE : (") side GND, the
ISOLATED(NEUTRAL) : (#) side GND and EARTH : ($) side
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and
never measure with a measuring apparatus (oscilloscope etc.)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
If above note will not be kept, a fuse or any parts will be broken.
5. If any repair has been made to the chassis, it is recommended
that the B1 setting should be checked or adjusted (See
ADJUSTMENT OF B1 POWER SUPPLY).
6. The high voltage applied to the picture tube must conform with
that specified in Service manual. Excessive high voltage can
cause an increase in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect installation, cracked or melted high voltage harness,
poor soldering, etc.). To maintain the proper minimum level of
soft X-Ray emission, components in the high voltage circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manufacturer of the complete
product.
7. Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the
picture tube before attempting meter connection, by connecting
a clip lead to the ground frame and connecting the other end of
the lead through a 10k!2W resistor to the anode button.
8. When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the
high voltage circuit area. Where a short circuit has occurred,
those components that indicate evidence of overheating should
be replaced. Always use the manufacturer's replacement
components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs,
metal cabinet, screwheads, earphone jack, control shafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.
(1) Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any exposed metal part having a
return path to the chassis should withstand a voltage of 3000V
AC (r.m.s.) for a period of one second.
(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance
rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated
200V or more, for a period of one second.)
This method of test requires a test equipment not generally found
in the service trade.
(2) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Using a "Leakage
Current Tester", measure the leakage current from each exposed
metal part of the cabinet, particularly any exposed metal part
having a return path to the chassis, to a known good earth
ground (water pipe, etc.). Any leakage current must not exceed
0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).
"
""
"Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC voltmeter
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1500!10W resistor paralleled by a 0.15"F
AC-type capacitor between an exposed metal part and a known
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connection to each exposed metal part, particularly any exposed
metal part having a return path to the chassis, and measure the
AC voltage across the resistor. Now, reverse the plug in the AC
outlet and repeat each measurement. Any voltage measured
must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA
AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC (r.m.s.).
This corresponds to 0.2mA AC (r.m.s.).
0.15
μ
F AC-TYPE
1500
!
10W
GOOD EARTH GROUND
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
AC VOLTMETER
(HAVING 1000
!
/V,
OR MORE SENSITIVITY)

No. 56091
A
V-14AM
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.
"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. 56091
A
V-14AM
5
FUNCTIONS
①VIDEO INPUT
②VIDEO OUTPUT
③AUDIO INPUT
④AUDIO OUT PUT
⑤AERIAL INPUT
①
①①
①
②
②②
②④
④④
④
③
③③
③
FRONT PANEL
REMOTE CONTROL UNIT
REAR PANEL
⑤
⑤⑤
⑤

No. 56091
A
V-14AM
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power plug.
2. As shown in figure, remove the 5screws marked A
AA
Aand a
screw marked B
BB
B.
3. Withdraw the rear cover toward you.
REMOVING THE MAIN PW BOARD
"After removing the rear cover.
1. Slightly raise the both sides of the MAIN PW BOARD by hand
and remove the PWB stopper marked c
cc
cfrom the front
cabinet.
2. Withdraw the MAIN PW BOARD backward.
(If necessary, take off the wire clamp,connectors etc.)
REMOVING THE SPEAKER
"After removing the rear cover.
1. By holding up the SPEAKER HOLDER slightly and unlocking
the claw (marked D
DD
D). Then SPEAKER HOLDER can be
removed.
2. Then you can remove the SPEAKER.
CHECKING THE MAIN PW BOARD
1. To check the PW Board from back side.
1) Pull out the MAIN PW Board. (Refer to REMOVING THE
MAIN PW Board)
2) Erect the PW Board vertically so that you can easily check
the back side of the PW Board.
[CAUTION]
"When erecting the PW Board, be careful so that there will be
no contacting with other PW Board.
"Before turning on power, make sure that the CRT earth wire
and other connector are properly connected.
WIRE CLAMPING AND CABLE TYING
1. Be sure to clamp the wire.
2. Never remove the cable tie used for tying the wires together.
Should it be inadvertently removed, be sure to tie the wires
with a new cable tie.

No. 56091
A
V-14AM
7
SPEAKER
MAIN PWB
CRT SOCKET PWB
REAR COVER
B
A
D
FRONT CABINET
POWER
CORD C
CRT
SPEAKER HOLDER
PWB STOPPER

No. 56091
A
V-14AM
8
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 thesetting item with theMENU ▼/
▲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.
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
Fig.2
SYSTEM CONSTANT-Ⅰ
ⅠⅠ
Ⅰ
COLOUR : MULTI
BILINGUAL : NO
TUNER : MU
ECO SENSOR : NO
LANGUAGE : E/R/A/F
: SELECT
: OPERATE DISP : EXIT
SYSTEM CONSTANT SET 1
SYSTEM CONSTANT-Ⅱ
ⅡⅡ
Ⅱ
B/B SOUND : OFF
LOCK : 180
COLOUR AUTO : NO
QSS : MINT
ALC : NO
TEXT RATE : 20
SYSTEM CONSTANT SET 2
:SEL :OPE DISP:EXIT
SYSTEM CONSTANT-Ⅲ
ⅢⅢ
Ⅲ
AMP TUNER : NO
SYSTEM CONSTANT SET 3
:SEL :OPE DISP:EXIT
PICTURE
MODE
DISPLAY MENU
▼
▼▼
▼／
／／
／▲
▲▲
▲
MENU
－
－－
－／
／／
／＋
＋＋
＋
Key assignement of remote control unit

No. 56091
A
V-14AM
9
SETTING OF SYSTEM CONSTANT SET
Setting item Setting contents Setting value
COLOUR MULTI
BILINGUAL NO
TUNER MU
ECO SENSOR NO
LANGUAGE E/R/A/F
B/B SOUND OFF
LOCK YES 10 20 ～230 240 250 180
COLOUR AUTO NO
QSS MINT
ALC NO
TEXT RATE 10 20 40 80 20
AMP TUNER NO
Table 1
USER SETTING VALUES
Setting item Setting value Setting item Setting value
1. Setting of FUNCTIONS 2. Setting of MENU
MAIN POWER OFF ON TIMER PR1 0:00
SUB POWER ON VNR OFF
CHANNEL POSITION 1 POSITION AUTO SHUTOFF OFF
VOLUME Appropriate sound volume CHILD LOCK OFF
TV/VIDEO(INPUT) TV BLUE BACK OFF
ON SCREEN DISPLAY POSITION NUMBER DISPLAY CHANNEL PRESET Refer to OPERATING INSTRUCTION
COLOUR SYSTEM AUTO PAL LANGUAGE ENGLISH
SOUND SYSTEM B / G TINT Refer to VSM PRESET
OFF TIMER OFF COLOUR Refer to VSM PRESET
PICTURE MODE (VSM) BRIGHT BRIGHT Refer to VSM PRESET
CONT. Refer to VSM PRESET
SHARP Refer to VSM PRESET
Table 2
MU MA
E/R/A/F E/A/F
ON OFF
YES NO
MULTI PALTRIPLE
YES NO
E/A E/F
YES NO
MINT MQSS
YES NO
YES NO

No. 56091
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SERVICE MENU SETTING ITEMS
Service menu Setting item Service menu Setting item
1. IF 1. VCO
2. DELAY POINT
2. V / C 1. CUT OFF (R / G / B)
2. DRIVE (R / B)
3. BRIGHT
4. CONT.
5. COLOUR (P / S / N3 /N4)
6. TINT (N3 / N4)
7. SECAM BL ADJUST
8. SHARP (TV/VIDEO)
3. DEF 1. VER. POSITION
2. HOR. POSITION
3. VER. HEIGHT
4. VER. LINEARITY
5. VER. SCURVE
6. HOR. VCO ADJUST
5. PRESET 1. C-TRAP FIX
2. SHARP PEAK
3. ABL
4. GAMMA
5. Y DELAY TIME
6. BLACK EXP START
7. C-BPF
8. CW/SCP
9. VIF DET LEVEL
10. SIF DET LEVEL
11. IF AGC MIN.
12. VIF AGC
13. VIF PMOD
14. SIF BPF BW ADJUST
15. SIF TRAP FO ADJUST
16. SIF TRAP FO ADJUST 2
17. SIF –TRAP
18. SIF –BPF
19. VNR
20. RGB LIM
21. RGB LIMIT LEVEL
22. SIF SW
23. TEXT H POSITION
24. READ DATA
4. VSM PRESET
(BRIGHT/STD/SOFT) TINT COLOUR
BRIGHT
CONT.
SHARP
6. TURBO TIMER ON or 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.
Table 3
DO NOT ADJUST
DO NOT ADJUST
DO NOT ADJUST

No.56091
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REPLACEMENT OF IC301 (IF VIDEO/CHROMA DECODER)
For the IC301(IF Video/Chroma Decorder) 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 CABINET simultaneously, turn the POWER ON. When the POWER is
turned ON, the data is written in the micro computer immediately.
FRONT CABINET

No. 56091
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V-14AM
12
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) BRIGHT
TINT / COLOUR / BRIGHT /
CONT / SHARP Refer to VSM
VNR OFF
BLUE BACK OFF
AUTO SHUT 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 Adjustment item
B1 POWER SUPPLY DEFLECTION circuit
adjustment
FOCUS adjustment VSM PRESET adjustment
IF circuit adjustment PRESET adjustment
VIDEO/CHROMA circuit
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 ･･････････････････････ For entering/adjusting the setting values (adjustment values) of the IF circuit.
"2. V/C ････････････････････ For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA circuit.
"3. DEF･･････････････････････ For entering / adjusting the setting values (adjustment values)#of the DEFLECTION circuit.
"4. VSM PRESET ･････････････ For setting the values of BRIGHT, STANDARD, and SOFT.
(VSM : video status memory)
"5. PRESET･･････････････････ This is used when the PRESET MODE is adjusted. [Do not adjust]
"6. TURBO TIMER ････････････ 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]

No. 56091
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3. BASIC OPERATION OF SERVICE MENU
(1) How to enter SERVICE MENU
Press the DISPLAY key and the PICTURE MODE key of the
REMOTE CONTROL UNIT simultaneously.
The SERVICE MENU screen of Fig. 1 will be displayed.
(2) Selection of SUB MENU SCREEN
Press one of the keys 1 ～6 of the REMOTE CONTROL UNIT,
and select the SUB MENU SCREEN (See Fig.2 on the next page) from the SERVICE MENU.
SERVICE MENU SUB MENU 1. IF
2. V / C
3. DEF
4. VSM PRESET
5. PRESET
6. TURBO TIMER
(3) Method of Setting
$Once the setting values are set, they are memorized automatically.
$It must not adjust without signal.
1) 1. IF
[1. VCO]
①1 Key ･･････････････････････････ Select 1. IF.
②1 Key ･･････････････････････････ Select 1. VCO(CW).
③VCO(CW) ････････････････････････ Adjust VCO(CW) while watching the colour (yellow / blue) of the characters on the
screen. For details, refer to the adjustment table.
④DISPLAY Key ･･･････････････････ When this is pressed twice, you will return to the SERVICE MENU.
[2. DELAY POINT]
①1 Key ･･････････････････････････ Select 1. IF.
②2 Key ･･････････････････････････ Select 2. DELAY POINT.
③MENU - / + Key ･････････････････ Set (adjust) the setting values of the setting items.
④DISPLAY Key ･･･････････････････ When this is pressed twice, you will return to the SERVICE MENU.
2) 2. V/C, 3. DEF, 4.VSM PRESET and 5. PRESET
①2 ～5 Keys ･･････････････････････ Select one from 2. V/C, 3.DEF, 4.VSM PRESET and 5. PRESET.
②MENU △/ ▽key ･･････････････ Select setting items.
③MENU - / + Key ･････････････････ Set (adjust) the setting values of the setting items. (Use the number keys of the
REMOTE CONTROL UNIT for setting of WHITE BALANCE and BLACK OFFSET. For
the setting, refer to each item concerned.)
④DISPLAY Key ･･･････････････････ When this is pressed , you will return to the SERVICE MENU.
3) 6. TURBO TIMER
①By pressing the 6-key, you can change the ON/OFF position. [Should be OFF]
(4) Release of SERVICE MENU
After completing the setting, return to the SERVICE MENU by pressing the DISPLAY key, then again press the DISPLAY key to return
to the normal screen.
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

No. 56091
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SUB MENU SCREEN (Fig.2)
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
AGC TAKE-OVER
**
- / + : OPERATE DISP : EXIT
6.TURBO TIMER OFF
ON /
OFF
(By pressing 6-key)
BRIGHT
TINT
COLOUR
BRIGHT
CONT.
SHARP
- / + : OPERATE DISP : EXIT
**
**
**
**
**
SUB MENU 4. VSM PRESET
/ :SELECT
DEF
- / + : OPERATE DISP : EXIT
***
SUB MENU 3. DEF
/ :SELECT
50Hz
1. VER. POSITION PAL
V/C PAL
1. CUTOFF
- / + : OPERATE DISP : EXIT
(
R
)
* **
(
G
)
* **
(
B
)
* **
50Hz
SUB MENU 2. V/C
/ :SELECT
PRESET
1. C-TRAP FIX
- / + : OPERATE DISP : EXIT
***
50Hz
SUB MENU 5. PRESET
/ :SELECT B/G
PAL
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.TURBO TIMER OFF
1-6 SELECT DISP : EXIT
******
************
***********
**********
***** **
****
**
.
****
********
****
*** ** **
*** ** ***** ** **
*** ** ** ** ***
** ***** ***
** ***

No. 56091
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ADJUSTMENT LOCATIONS
S
1Pin TP-91(B1)
2Pin NC
3Pin X-ray2
4Pin X-ray1
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
E1
U
T
PW
UPPER:FOCUS
LOWER:SCREEN
TP-47R
TP-47B
TP-E
T
CRT EARTH WIRE
(BRAIDED ASS'Y)

No. 56091
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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. Receive 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. Receive 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. Receive 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
***(**)
***(**)***(**)
***(**)
VIF VCO ADJUST
***(**)
***(**)***(**)
***(**)
FINE
DISP : EXIT
YELLOW
Do not ad
j
ust

No. 56091
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Item Measuring
instrument Test point Adjustment part Description
Adjustment
of DELAY
POINT
(AGC)
Signal
generator
Remote
control unit
DELAY POINT
(AGC TAKE-OVER)
1. Receive 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. Adjust the MENU - or + key until video noise disappears.
5. Turn to other channels and make sure that there are no
irregularities.
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”.
Initial setting value
Colour system
Setting item PAL SECAM NTSC 3.58 NTSC 4.43
RED -50
GREEN -50
1. CUT OFF
BLUE -50
RED +0
2. DRIVE BLUE +0
3. BRIGHT +0
4. CONT. +0
5. COLOUR +0 +0 +0 +0
TV +0 (+0)
6. TINT VIDEO +8 (+0)
7. SECAM BL ADJUST +0
TV -15
8. SHARP
(Do not adjust) VIDEO +5 ( ) : OFFSET Value
DELAY POINT
(AGC TAKE OVER) Initial setting value
NTSC 3.58 48
OTHER 43

No. 56091
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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. 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 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, thenslowlyturn 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. 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 4and 7or 6and 9keys 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-64～+63 +0
2. DRIVE B-64～+63 +0
V/C PAL
1. CUTOFF
- / + : OPERATE DISP : EXIT
(R) * **
(G) * **
(B) * **
50Hz
/ :SELECT
V/C PAL
2. DRIVE
- / + : OPERATE DISP : EXIT
(R) * **
(B) * **
50Hz
/ :SELECT
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
123
456
789
H.LINE ON
H.LINE OFF
R. CUTOFF( )
△
R. DRIVE( )
R. CUTOFF( )
R. DRIVE( )
△
B. CUTOFF( )
△
B. DRIVE( )
△△
△△
B. CUTOFF( )
B. DRIVE( )
△
△
G. CUTOFF( )
G. CUTOFF( )
△
RGB

No. 56091
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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. 56091
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20
Item Measuring
instrument Test point Adjustment part Description
5. COLOUR [Method of adjustment using measuring instrument]
PAL COLOUR 1. Receive 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-47R/G and TP-E.
6. Adjust PAL COLOUR to bring the value of (A) in the illustration
to+9V (W&G).
SECAM COLOUR 1. Receive 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 +3V (W & G).
NTSC 3.58 COLOUR 1. Receive 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 +7V (W&G).
Adjustment
of SUB
COLOUR Ⅱ
ⅡⅡ
Ⅱ
Signal
generator
Oscillo-
scope
Remote
control unit
TP-47R/G
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.
WYCy G
Mg RB
(A) 0V
(－)
(＋)