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MITSUBISHI CT 29BV1 BD
1. Connect an RF signal such as an off-air
Adjustments Cont'd
broadcast.
2. Adjust the FOCUS control for the best overall
2.4.5 Height and linearity
focus.
Code: 00 (0 VH5) [V-AMP]
2.5 VIDEO CIRCUITS
Code: 04 (4 LIN) [V-LIN]
Perform the following adjustments after
1. Connect a VCR and play a PAL-Monoscope
adjusting the Deflection circuits. Allow the TV to
alignment tape.
warm up for 20 minutes before proceeding
2. Select the VCJ adjustment display.
3. Set the adjustment code to 00 (0 VH5) with
2.6.1 Brightness and Contrast
buttons "2" or "8" on the remote control.
4. Adjust the circle to a true circle with buttons
SCREEN control on the Flyback Transformer
"4" or "6" on the remote control.
Code: 0F (6 COL) [COLOUR SATURATION]
5. Set the adjustment code to 04 (4 LIN) with
Code: 0E (S BRI) [BRIGHTNESS]
buttons "2" or "8" on the remote control.
Code: 0D (4 CON) [CONTRAST]
6. Adjust the linearity to be the same for the top
BEAM CURRENT (using connector TP adjacent
and bottom halves of the circle using buttons
to the Flyback Transformer)
"4" or "6" on the remote control.
7. Set the adjustment code to 00 (0 VH5) with
1. Connect a Black raster signal to the RE or AV
buttons "2" or "8" on the remote control.
input.
8. Readjust V-AMP with buttons "4" or "6".
2. Select the VCJ adjustment display.
9. Repeat the steps above, if necessary.
3. Connect an oscilloscope to the junction of
R673 and wire link W603.
2.4.6 Vertical centre
4. Adjust the SCREEN control on the Flyback
Transformer to give a voltage of 170V as
Code: 08 (7 VS5) [V-SHIFT-50]
shown in fig. 2.6A.
1. Connect a VCR and play a PAL-Monoscope
alignment tape.
2. Select the VCJ adjustment display.
3. Set the adjustment code to 08 (7 V55) with
buttons "2" or "8' on the remote control.
4. Adjust the centre line of picture to be within +/
- 3mm from the vertical centre on the screen
5. Change the external signal to a G-Card.
using buttons "4" or "6" on the remote control.
6. Set the adjustment code to 0F (6 COL) with
buttons "2" or "8" on the remote control.
2.4.7
60Hz Deflection circuit offsets
7. Adjust the data value to "-32" with buttons "4"
or "6" on the remote control.
Code: 14 (8 VH6)
[V-AMP-60]
8. Set the adjustment code to 0E (5 BRI) with
Code: 15 (9 PA6)
[P-AMP 60]
buttons "2" or "8" on the remote control.
Code: 16 (12 HW6)
[H-AMP 60]
9. Adjust using buttons "4" or "6" so that a slight
Code: 17 (13 VS6)
[V-SHIFT 60]
difference in brightness can be seen between
Code: 18 (14 HP6)
[H-PHASE 60]
blue and black areas.
10.Connect a DC ammeter's "+" lead to
1. Connect an RE 60Hz Crosshatch signal.
connector TP pin 1 on the MAIN-PCB and the
2. Select the VCJ adjustment display.
"-" lead to connector TP pin 2.
3. Select each adjustment code in turn with
11.Adjust the beam current using buttons "4" or
buttons "2" or "8" on the remote control and
"6" on the remote control to 1300±20µA.
adjust each item to the figures shown in table
12.Check, and if necessary, readjust the
2.4C below using buttons "4" or "6" on the
BRIGHTNESS, code OE (5 BRI).
remote control.
13.Check that the Screen Up/Down Request Bit
is "00". If not, repeat steps 1 to 4 above.
CODE:
14.Now proceed to the Colour Output adjust-
ment.
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VALUE:
14
8 VH6
+7
2.6.2 Colour output
15
9 PA6
+2
16
12HW6
- 2
Make this adjustment only after adjusting the
17
13VS6
+8
White Balance, Brightness and Contrast.
18
14HP6
-5
Code: 0F (6 COL) [COLOUR SATURATION]
table 2.4C 60Hz adjustment offsets
1. Connect an RE Colour-bar signal.
2. Select the VCJ adjustment display.
2.5 CRT CIRCUITS
3. Set the adjustment code to 0F (6 COL) with
buttons "2" or "8" on the remote control.
2.5.1 White balance
4. Connect an oscilloscope to the junction of
R673 and IC660 Pin 9 (BLUE-OUT) on the
Code: 0A (1 BDR) [B-DRIVE]
CRT PCB).
Code: 0B (2 GDR) [G-DRIVE]
5. Make adjustments using buttons "4" or "6" on
Code: 0C (3 RDR) [R-DRIVE]
the remote control until the waveform is as
shown in figure 2.6A.
1. Connect a VCR and play a PAL-Monoscope
alignment tape.
2.7 POWER CIRCUIT
2. Select the VCJ adjustment display.
3. Set the adjustment codes to 0A (1 BDR), 0B
2.7.1 B4 Voltage
(2 GDR) and 0C (3 RDR) in turn and pre-
VR951 (on main PCB next to the SMT)
adjust each to "+10".
1. Connect a VCR and play a PAL-Monoscope
4. Adjust codes 0A (1 BDR) and OC (3 RDR) to
alignment tape.
adjust the white balance.
2. Push the OPTIMUM button on the remote
control.
2.5.2 Focus
3. Connect a DC voltmeter's "+" lead to TP91 on
the MAIN PCB and the "—" lead to GROUND.
FOCUS control on the Flyback Transformer
4. Adjust VR951 so that the voltage is 145±2V.
2
Text PCB Diagram
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