Sony KL-X9200M Service Manual page 37

C BOARD ADJUSTMENT
IC level Adjustment
1) Input Video signal.
2) Enter the SERVICE mode.
3) Select 10-step signal at [OPTION1] "03" TEST SIGNAL.
4) Connect oscilloscope to the check point for the input signal.
R IN (CN5004 PIN 1 )
G IN (CN5004 PIN 3 )
B IN (CN5004 PIN 5 )
Adjust the input level every time when adjusting R, G, or B.
5) Take notes of data of [CXA2055-1] "00" SBRT and
[CXA2055-2] "00" DRVL.
6) Make the pedestal level 2.0Vp-p with SBRT, then adjust to
make the amplitude 1.0Vp-p with DRVL. At this time, adjust
them with keeping track at SBRT and DRVL.
7) After adjusting, change back the data of SBRT and DRVL,
then save them.
1. R channel
1) Enter SERVICE mode, and change the data of
[CXA2111] "25" GAMO from 0 to 1.
2) Connect oscilloscope to TP5202 (C Board).
3) In the SERVICE mode, select [M62370] "00" R GN,
and adjust it so that 0IRE ~ 100IRE becomes 1.64
±0.02Vp-p.
4) In the SERVICE mode, select [M62370] "03" R BS, and
adjust it so that the forward 0IRE ~ reverse 0IRE be-
100 IRE
comes 5.56 ±0.02Vp-p.
5) Confirm that the amplitude of waveforms at TP5203 and
TP5202 is within ±150mV by executing adjustment 3
1.0 ± 0.02 Vp-p
and 4 again.
6) Change back the data of [CXA2111] GAMO from 1 to 0
after adjusting, then save them.
0 IRE
2.0 ± 0.02 Vp-p
GND
2. G channel
1) Enter SERVICE mode, and change the data of
[CXA2111] "27" GAMO from 0 to 1.
2) Connect oscilloscope to TP5402 (C Board).
3) In the SERVICE mode, select [M62370] "01" G GN,
and adjust it so that 0IRE ~ 100IRE becomes 1.44
±0.02Vp-p.
4) In the SERVICE mode, select [M62370] "04" G BS,
and adjust it so that the forward 0IRE ~ reverse 0IRE
becomes 5.12 ±0.02Vp-p.
5) Confirm that the amplitude of waveforms at TP5403
and TP5402 is within ±150mV by executing adjustment
3 and 4 again.
6) Change back the data of [CXA2111] GAMO from 1 to 0
after adjusting, then save them.
– 37 –
KL-X9200M/X9200U
0 IRE
Rch 5.56
±0.02Vp-p
100 IRE
Rch 1.64 ±0.02Vp-p
0 IRE
0 IRE
Gch 5.12
±0.02Vp-p
100 IRE
Gch 1.44 ±0.02Vp-p
0 IRE
RM-902