29H-FG3RU
bA = BA = B
ABAB
Fig.1-1Fig. 1-2 Rank "A"Fig. 1-3 Rank "A"
a
(on the left of the CRT)
(on the right of the CRT)
90mm90mmContinuosly press the mono- colour key 1 second or more, and the monocolour mode will be selected without the service mode.
**Even with TEXT key or "R/G/B" key, it can be directly switched to each monocolor screen.
2Kgf)
?RED screen
Monocolour
A or more
?
50
?
20N (11Kgf
?
13-2
.BLUE screen
MonocolourMonocolour
screen release
PURITY ADJUSTMENTFollow the job instruction manual to adjust the magnetic field.the beam current 1700 for 30 minutes or more.monocolor key of R/C for process, and the monocolor screen (green) will be selected.
Adjustment conditions/procedureWaveform or remarks
ghtening torque : 108N
Move DY fore and aft to set the landing at the TiGREEN screendjustment for uniformity is change to another
Select the green monocolor screen with remote contoller, and set the beam current of 1.7mA with the contrast control.Degauss the CRT enough with the degausing coil. Note: 0 magnetic field, and the convergence must be adjusted to be rough. With P-MAG, adjust it to the center - rank A.Observe the points a,b, as shown in Fig.1-1 through the microscope. point (Rank A).center "Rank AB".east direction.?netic sheet to set the landing at rank A for com- pensation.Note:Apply the adjustment after aging withNote:Select the service mode, and press thescreen as follows.Monocolourvery push of the monocolour key changes thecontent. Please refer to the following page.
1.2.3.The purity magnet must be previously set at the4.5.If the a/b balance is poor, compensate it to the6.Aline it to zero, keeping the raster rotation in the6.Tighten the deflection coil fastening screws.8.Checking the CRT corner area, bond the mag-*E*A
Adjustment pointPURITY ADJ.
1
No.
aveform or remarks
V,
?
eW
V to be sure.
?
.
V (75 ohm termination)13-1
?
1.0V below maximum volt-
1dB~
?Fig. 3
PIF ADJUSTMENT
Adjustment condition/procedur
rminal) as shown in figure 3-1.
Signal Strength: 54 TeSelect "RF-AGC" item in the Adjustment Mode. Adjust the "RF-AGC" bus data to obtain the Tuner output pin drop 0.1V age.and make sure there is no noise.the waveform.that there is no cross modulation beat
1.Receive "PAL COLOR BAR" signal2.Connect the oscilloscope to TP53 (Tuner's AGC3.4.Change the antenna input signal to 63 ~ 67dB5.Set the RF AGC to 0 - 6 V with no saturation with6.Turn up the input signal to 90 ~ 95 dB
AKE OVER2C BUS
Adjustment pointRF-AGC TPOINT AD- JUSTMENT (ICONTROL)
1
No.
13 |
ACEC
SHARP
