2.5 Adjustment Procedure
TOP PREVIOUS NEXT
Item / Preparation Adjustment Procedure
+B Voltage Confirm the DC voltage at the indicated test points, as follows :
1. Operate the TV set. TPA 10 : 141.0 ± 2.0V
2. Set control as follows : TPA 8 : 8 ± 1V
Brightness ........... minimum TPA 9 : 5 ± 1V
Contrast .............. minimum TPA 21 : 175 ± 15
RF AGC
1. Receive a colour bar signal at an RF
level of 69 +1-2 dBU with 75Ω
loaded.
1. Select “RF AGC” indication in CHK2, on Screen by remote control at
factory mode.
2. Connect digital multimeter to RF
AGC at Tuner.
2. Set RF AGC by using remote control Volume (+) or Volume (-) button until
voltage AGC at Tuner reaches 2.6 ± 0.1V at TPA 15 (Tuner point).
3. Increase RF signal strength by 2dB, confirm AGC at Tuner voltage drop.
High Voltage
1. Receive the crosshatch pattern. 1. Connect a DC voltage meter to TPA 12 and confirm the +B voltage is 141.0
± 2.0V.
2. Set to 0 Beam.
Screen VR .......... minimum 2. Connect a high frequency voltmeter to heater and confirm that voltage reads
6.0 ± 0.24 (VRMS).
Contrast .............. minimum
3. Normalize the brightness and contrast.
Item / Preparation Adjustment Procedure
NTSC TINT COLOUR
Connect a short jumper between TPA 10
and TPA 20.
Press Main Menu and set system to use
AV-NTSC (3.58 MHz).
DYNAMIC ................. Normal
ChannelCLR Set ..... STD
1. Adjust Sub-Tint so that No. 2, 3 and 4 becomes level waveform is similar to
Fig. 3.
2. Confirm phase at Tint is changes more than ± 30 by Tint control.
http://202.224.189.179/viewing/OT/TC-14Z88RQ/SVC/s0205000000.html (1 of 2)10.02.2006 2:30:04
To Next Page
Loading...
