AV-21F9
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 ways for adjusting this TV: One is with the7. Preparation for adjustment (presetting):
REMOTE CONTROL UNIT and the other is the conventionalUnless otherwise specified in the adjustment items, preset the
method using adjustment parts and components.following functions with the remote control unit.
2. The setting (adjustment) using the REMOTE CONTROL
UNIT is made on the basis of the initial setting values. TheFunctionSetting value
setting values which adjust the screen to the optimum con-PICTURE MODE (VSM)BRIGHT
dition can be different from the initial setting values.
COLOUR/BRIGHT/CONT./SHARPSee "VSM Preset"
3. Make sure that connection is correctly made to AC power source.on page 23.
4. Turn on the power of the TV and measuring instrument for warm-
ing up for at least 30 minutes before starting adjustment.VNROFF
5. If the receive or input signal is not specified, use the most ap-TREBLE/BASS/BALANCECENTER
propriate signal for adjustment.LIVE SPATIALOFF
6. Never touch parts (such as variable resistors, transformers andECO SENSOROFF
capacitors) not shown in the adjustment items of this service
adjustment.
MEASURING INSTRUMENTADJUSTMENT/CHECK ITEMS
AND FIXTURES
Adjustment/Check item Page
1. DC voltmeter (or Digital voltmeter)B1 POWER SUPPLY Check14
2. Oscilloscope
3. Signal generator (Pattern generator)FOCUS Adjustment14
[PAL / SECAM / NTSC]
IF CIRCUIT Adjustment14
4. Remote control unitV/C (VIDEO/CHROMA) CIRCUIT Adjustment15
DEFLECTION CIRCUIT Adjustment21
VSM PRESET Adjustment23
AUDIO Adjustment23
CENTER Adjustment23
PURITY, CONVERGENCE Adjustment24
BASIC OPERATION IN 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:
l 1. IF ............................. For entering/adjusting the setting values (adjustment values) of the IF circuit.
l 2. V/C........................... For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA circuit.
l 3. AUDIO ..................... For entering/adjusting the setting values (adjustment values) of the multiplicity sound circuit.
(Do not adjust the preset values.)
l 4. DEF ......................... For entering/adjusting the setting values (adjustment values) of the DEFLECTION circuit.
l 5. VSM PRESET ......... For setting the values of STANDARD, SOFT and BRIGHT (Do not adjust the preset values.)
(VSM: video status memory)
l 6. CENTER.................. For setting the CENTER ADJUST values of TREBLE and BASS. (Do not adjust the preset values.)
l 7. TURBO TIMER........ For quick setting the values of TIMER COUNT N 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. (Applicable to OFF TIMER, ON
TIMER and AUTO SHUTOFF)
Note: When you turn the TV power off, the Turbo Timer is automatically set to OFF.
No. 5603710 |
ACEC
