Service Adjustments; Adjustment Items - JVC AV-27F713 Service Manual

AV-27F703
AV-27F713
AV-27F803

SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION
1. You can make the necessary adjustments for this unit with
either the Rem ote Control Unit or with the adjustment tools
and par ts as given below.
2. Ad justment with the Remote Control Unit is made on the
basis of the initial setting values, however, the new setting
values which set the screen to its optimum condition may
differ from the initial settings.
3. Make sure that AC power is turned on c orrec tly.
4. Turn on the power for s et and test equipment before use, and
start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise s pec ified, prepare the most suitable reception
or input signal for adjustment.
6. Never touch any adjustment part which are not specified in the
list for this adjustment - variable res istors, transformers, initial
setting value, etc.
7. Pres etting before adjustment.
Unless otherwise spec ified in the adjustment instructions, preset
the following functions with the remote c ontrol unit:
User menu preset value
MENU ITEM
VIDEO STATUS
BASS, TREBLE, BALANCE
HYPER SURROUND
TINT, COLOR,
PICTURE, BRIGHT , DETAIL
MTS

ADJUSTMENT ITEMS

%
CHECK OF B1 POWER SUPPLY
%
ADJUSTMENT OF VCO
MAIN VCO adjustment
SUB VCO adjustment
RF. AGC adjustment
%
FOCUS adjustment
% ADJUSTMENT DEF CIRCUIT
V. HEIGHT / V. CENTER(4:3) adjustment
V. HEIGHT / L. LIN(16:9) adjustment
H. POSI, H. SIZE & SIDE PIN [ (4:3) &(16: 9) ] adjustment
PIP DISPLAY POSI adjus tment
12
ADJUSTMENT EQUIPMENT
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) ［ NTSC ］
4. Remote control unit
5. TV audio multiplex signal generator.
6. Frequenc y counter
PRESET
STANDARD
CENTER
OFF
CENTER
STEREO
%
ADJUSTMENT OF VIDEO / CHROMA CIRCUIT
WHITE BALANCE(High Light & Low Light) adjustment
PIP WHITE BALANCE(High Light) adjustment
SUB BRIGHT adjustment
SUB CONTRAST adjustment
SUB COLOR adjustment
SUB TINT adjus tment
%
ADJUSTMENT OF MTS CIRCUIT
MTS INPUT LEVEL adjustment
MTS SEPARATION adjustment
%
HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT
No. 52005
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
DISPLAY
SLEEP
TIMER
VIDEO
STATUS
FUNCTION
▼/▲
(RM-C325G)
POWER
NUMBER
MUTING
MEMORY
FUNCTION
/
EXIT
PIP OFF