TCL CTR1042, Service Manual

Page: 56 / 89

1. FLOWCHART OF ALIGNMENT PROCEDURE
2 Adjustment of B+ voltage
1) Apply 120VAC(5V) to mains power input, and Philips standard testing pattern to RF input.
2)
Adjust VR830 in STANDARD mode until voltage at TP2 (B+) is 106V 0.5V.
3. RF AGC adjustment
Observe monitor the collector waveform of Q101 with the probe of Oscilloscope as illustration
below. Select channel 2 (>70dB) from the antenna input. Enter D-mode, select menu6 to adjust
RFAGC item until the monitor peak value to 0.8V .
p-p
4. Screen & Focus voltage adjustment
--- Apply pattern signal in normal status, enter D-mode, press TV/AV button to turn off the
vertical output.
--- Adjust the SCREEN switch on the flyback transformer to make a horizontal shining line just
visible on the screen.
---Turn on the vertical output, adjust the FOCUS on the flyback transformer to obtain the
optimum focus.
5. White balance adjustment
1)Apply the black and white pattern in normal status;
2)Alignment of normal colour temperature
---- Change Colour Temperature to normal status
---- Use a colour analyzer to measure the black side of the screen. By changing the value of
RC, GC and BC, set the reading of the colour analyzer to X=284, Y=299.
---- Use a colour analyzer to measure the white side of the screen. By changing the value of
GD, BD, set the reading of the colour analyzer to X=284, Y=299
---- Separately set the brightness and contrast from min. to max., repeat the step 2 and 3 until
The reading of the colour analyzer is correct.
Colour Television Chassis: M123A
56
9. Alignment Procedures
Center & Amplitude
and OSD adjustment
B+
Adjustment
AGC
S c r e e n &
f o c u s
Adjustment White
Balance
Adjustment
Sub-
brightness
Adjustment
Pincushion correction &
H o r i z o n t a l A m p l i t u d e
adjustment