29WF50
A=BA=B
bB
B
Fig. 4-1
aAA
Fig. 4-2 Rank A (On the right of CRT)Fig. 4-3 Rank A (On the left of CRT)*Continuosly press the monocolour key 1 second or more, and the monocolour mode will be selected without the serv- ice mode.
90 mm90 mm
Fig.4-1
RED
Screen
Monocolour
9-2
Screen BLUERelease
Monocolour
Monocolourscreen
PURITY ADJUSTMENTjust the magnetic field. *BH = 0 *Bv = refer to the job intructions sheet.beam current 1,600 ? 50?A or more for 30 minutes or more.monocolour key of R/C for process, and the monocolour screen (green) will be selected.
Adjustment Condition / ProcedureWaveform or others
mote controller, and set the beam current to 1.6mA with the contrast control.ing coil. Note:Follow the job instruction sheet to ad-the zero magnetic field and the convergence must be roughly adjusted. With P-Mag, adjust it to the center: rank A.through the microscope. Move DY fore and aft to set the landing at the point (rank A).center "Rank AB".the east direction.Tightening torque : 180 ? 20N (18 ? 2Kgf)net sheet to set the landing at Rank A for com- pensation. Note:Apply the adjustment after aging with theNote:Select the service mode, and press theScreen GREENcontent. Please refer to the following page.
screen as follows.Monocolour
1.Select the green monocolour screen with re-2.Degauss the CRT enough with the degauss-3.The purity magnet must be previously set at4.Observe the points a, b, as shown in 5.If the a/b balance is poor, compensate it to the6.Align it to zero, keeping the raster rotation in7.Tighten up the deflection coil screws.8.Checking the CRT corner area, bond the mag-*Every push of the monocolour key, changes the*Adjustment for uniformity is change to another
Adjustment pointADJUSTMENT
1PURITY
No.
Note:The setting below is auto- matically set when the SUB-VOL is selected in the service mode. *SURROUND OFF *S-NORMAL state *S-VOL Max *Bass + OFF
9-1
-0.05 Vrms
SOUND ADJUSTMENT
Adjustment Condition / ProcedureWaveform or othersAdjustment Condition / ProcedureWaveform or others
Signal content: 400 Hz 100% Mod.nector.indicate 5.0 Vrms (at L-CH) Adjustment value: 5.0? 0.3 Vrmssure the sound is heard from the speakers. Then put the unit in no signal state.(Set the receiving frequency at AFT OFF VHF high frequency.)(1) of SC200 (in the main unit).and clockwise to 5V, and adjust T2300 to make the DC voltage of TP2300 become 2.5 ? 0.1 V in the range.Vcc5 ? 0.1V
SIF(NICAM/IGR) ADJUSTMENT
1.Receive PAL Colour Bar signal.2.Connect the probel of the meter (*) to (SI) con-3.Select the SUB-VOL in the service mode. 4.Adjust the SUB-VOL data to make the meter1.Receive the PAL Colour Bar signal. 2.Turn up the volume control to maximum, make3.Check the sound mute is effective. 4.Finally turn sound level of CTV to minimum.1.Receive the PAL Colour Bar signal.2.Connect the digital voltmeter to TP2300 or pin3.Verify that it is turned counterclockwise to 0V*Single-unit adjustmentIF input frequency 38.9MHz ? 10kHz. Control it under these conditions.Adjust T2300 to make the DC voltage of TP2300 (in the NICAM unit) become 2.5 ? 0.1V.After single-unit adjustment, check the practical setup.Align the receiving frequency to the select chan- nel frequency. (AFT OFF)The checked voltage must be2.5 ? 1.0V.(Take care that ? 1.0 is considered for the Vcc difference between the single unit and unit, Fo difference and so on, but is not the adjustment precision.)
Adjustment point(BUS ADJUST- MENT)CHECKINGAdjustment pointT2300 (SX68KF7)
1SUB VOL2NOISE MUTE1VCO COIL
No.No.
9 |
ACEC
SHARP
