5 ADJUSTMENT PROCEDURE
5.1. VOLTAGE CONFIRMATION
Item/Preparation
Adjustment Procedure
1.
+B voltage
1.
TPD2 : 144.8V ± 1V
2.
TPD21: 13.5V ± 1V
3.
TPD3 ~ TPD4 : 35V ± 3V
5.2. E.H.T CHECK
Item/Preparation
Adjustment Procedure
1.
Receive an RF signal, window or crosshatch pattern.
2.
Set the Brightness and Contrast to minimum (0 Beam)
3.
Connect the High Voltage Voltmeter to the CRT ANODE CAP.
4.
The set should be switched to AV (no input) contrast and
brightness minimum.
1.
Check the EHT voltage is (32.0 ± 1.0) kV.
2.
Switch from AV mode to TV.
3.
With the Brightness and the contrast controls MAX, check that the
high voltage does not drop more than 3.0 kV from the above
measurement with R.F. signal.
5.3. SUB CONTRAST
Item/Preparation
Adjustment Procedure
1.
Receive PAL colour bar pattern
2.
Connect oscilloscope to A51 pin 48.
3.
Set controls:
BRT................CENTER
COLOUR........CENTER
CONTRAST....MAX
AI....................OFF
1.
Adjust Sub Contrast (Service 1):
A = 3.85 ± 0.1V
Fig. 1
2.
Adjust Video gain 2 (Service 1) so that Sub picture level B
becomes as same as Main picture level A.
Fig. 2
11
TX-34P180B
Summary of Contents for tx-34p180b
Page 21: ...8 SCHEMATIC DIAGRAMS 8 1 SCHEMATIC DIAGRAM NOTES 22 TX 34P180B ...
Page 22: ...23 TX 34P180B ...
Page 23: ...8 2 GM BOARD 8 2 1 GM BOARD 1 2 1A 4A 5A 6A 7A 8A 9A 10A 11A 12A 3A 2A 24 TX 34P180B ...
Page 24: ...8 2 2 GM BOARD 2 2 1A 4A 5A 6A 7A 8A 9A 10A 11A 12A 3A 2A 25 TX 34P180B ...
Page 25: ...8 3 L BOARD 8 3 1 L BOARD 1 3 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 26 TX 34P180B ...
Page 27: ...8 3 3 L BOARD 3 3 1B 2B 3B 6B 4B 5B 8B 10B 11B 12B 13B 14B 15B 16B 9B 7B 28 TX 34P180B ...
Page 28: ...8 4 A BOARD 8 4 1 A BOARD 1 5 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 12A 13A 29 TX 34P180B ...
Page 33: ...8 5 D BOARD 8 5 1 D BOARD 1 5 1A 2A 3A 4A 3A 3A 3A 3A 3A 3A 3A 3A 34 TX 34P180B ...
Page 37: ...8 5 5 D BOARD 5 5 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D 11D 12D 13D 14D 38 TX 34P180B ...
Page 38: ...8 6 G BOARD 8 6 1 G BOARD 1 2 1A 2A 3A 4A 39 TX 34P180B ...
Page 39: ...8 6 2 G BOARD 2 2 1A 2A 3A 4A 40 TX 34P180B ...
Page 40: ...9 PARTS LOCATION 41 TX 34P180B ...
Page 41: ...10 REPLACEMENT PARTS LIST 10 1 Replacement Parts List Notes 42 TX 34P180B ...
