Toshiba VTW2185 Service Manual page 41

(REC TUNER)
1. Place the set with Aging Test for more than 10 minutes.
2. Connect the oscillator (39.5MHz) to TP6001.
3. Connect the digital voltmeter between the pin 7 of
CP603 and the pin 1 (GND) of CP603.
Adjust the L6006 until the digital voltmeter is 2.4 ± 0.1V.
4.
2-3: RF AGC
(MONITOR TUNER)
1. Place the set with Aging Test for more than 15 minutes.
Receive the UHF (63 ± 1dB).
2.
3. Connect the digital voltmeter between the pin 5 of
CP603 and the pin 1 (GND) of CP603.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "RF AGC".
5. Press the LEFT/RIGHT button on the remote control
until the digital voltmeter is 2.5 ± 0.1V.
(REC TUNER)
1. Place the set with Aging Test for more than 15 minutes.
Receive the UHF (63 ± 1dB).
2.
3. Connect the digital voltmeter between the pin 6 of
CP603 and the pin 1 (GND) of CP603.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (39) on the remote control to
select "REC AGC".
5. Press the LEFT/RIGHT button on the remote control
until the digital voltmeter is 3.3 ± 0.1V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
1. Connect the digital voltmeter to TP401.
2. Set condition is AV MODE without signal.
3. Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR1701 until the digital voltmeter is 115 ± 1V.
4.
2-5: FOCUS
1. Receive a broadcast.
2. Turn the Focus Volume fully counterclockwise once.
3. Adjust the Focus Volume until picture is distinct.
2-6: HORIZONTAL POSITION
1. Receive the monoscope pattern from the Pattern
Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (08) on the remote control to
select "H POSI (50)".
4. Press the LEFT/RIGHT button on the remote control
until the SHIFT quantity of the OVER SCAN on right
and left becomes minimum.
5. Receive the cross hatch signal of NTSC. (Audio Video
Input)
6. Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~4.
ELECTRICAL ADJUSTMENTS
D3-2
2-7: VERTICAL POSITION
NOTE: Adjust after performing adjustments in section 2-6.
1. Receive the monoscope pattern from the Pattern
Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (09) on the remote control to
select "V POSI (50)".
4. Check if the step No. V. POSI (50) is "05".
5. Adjust the VR402 until the horizontal line becomes fit to
the notch of the shadow mask.
6. Receive the cross hatch signal of NTSC. (Audio Video
Input)
7. Press the AV button on the remote control to set to the
AV mode.
8. Using the remote control, set the brightness and
contrast to normal position.
9. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (09) on the remote control to
select "V POSI (60)".
10. Check if the step No. V. POSI (60) is "15".
2-8: VERTICAL SIZE
NOTE: Adjust after performing adjustments in section 2-7.
1. Receive the monoscope pattern from the Pattern
Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (11) on the remote control to
select "V SIZE (50)".
4. Adjust by using the LEFT/RIGHT button on the remote
control so that the Up/Down OVER SCAN Quantity
becomes equal to the Right/Left OVER SCAN Quantity.
5. Receive a broadcast and check if the picture is normal.
6. Receive the cross hatch signal of NTSC. (Audio Video
Input)
7. Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~4.
2-9: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-8.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Position and Vertical Size adjustments.
1. Receive the monoscope pattern from the Pattern
Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Adjust the VR401 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.