Mitsubishi CT32CW1BD Schematic
MITSUBISHI CT-32CW1BD
General Information
Also Covers
CT-32CW1CD
Recommended Safety Parts
Item Part No. Description
255P813O10 ASSY-ITC W76EGX023X122
T 552 334P247O10 TRANS-FLYBACK
T 901 350P684O10 TRANS-POWER
4098139O10 COIL-DEGAUSSING
4098143O10 COIL-CANCEL
R 545 103P390O70 R-FUSE 1/2W 33-J
R 557 103P442O20 R-FUSE-METAL 1W 560 -K/J
R 558 103P397O90 R-FUSE 1/2W 0.82-J
R 560 103P397O90 R-FUSE 1/2W 0.82-J
R 562 103P398O20 R-FUSE 1/2W 15-J
R 582 103P398O20 R-FUSE 1/2W 1.5-J
R 583 103P397O90 R-FUSE 1/2W 0.82-J
R 609 103P370O10 R-FUSE 1/4W 10-J
R 612 103P392O50 R-FUSE 1/2W 1K-J
R 614 103P370O10 R-FUSE 1/4W 10-J
R 615 103P370O10 R-FUSE 1/4W 10-J
R 647 103P392O50 R-FUSE 1/2W 1K-J
R 662 103P370O10 R-FUSE 1/4W 10-J
R 671 103P438O10 R-FUSE-METAL 2W 1.2-K/J
R 930 1090021O20 R-COMPOSITION 1/2W 6.8M-K
R 931 1090021O20 R-COMPOSITION 1/2W 6.8M-K
R 3530 103P398O80 R-FUSE 1/2W 4.7-J
R 3531 103P398O80 R-FUSE 1/2W 4.7-J
R 3540 103P398O80 R-FUSE 1/2W 4.7-J
R 3541 103P398O80 R-FUSE 1/2W 4.7-J
R 3550 103P398O80 R-FUSE 1/2W 4.7-J
R 3551 103P398O80 R-FUSE 1/2W 4.7-J
R 3560 103P398O80 R-FUSE 1/2W 4.7-J
R 3561 103P398O80 R-FUSE 1/2W 4.7-J
R 5352 103P398O80 R-FUSE 1/2W 4.7-J
R 5355 103P392O50 R-FUSE 1/2W 1K-J
R 5356 103P392O20 R-FUSE 1/2W 560J
C 918 189P094O20 C-C-AC ACT4K E3300pF-M
C 990 189P117O30 C-M-P-AC AC250V 0.22uF-M
C 991 189P117O30 C-M-P-AC AC250V 0.22uF-M
C 992 189P117O30 C-M-P-AC AC250V 0.22uF-M
C 993 189P117O20 C-M-P-AC AC275V 0.luF-M
J 651 449C113O10 SOCKET-CRT
S 991 432C074O40 SW-PUSH
F 991 2830047O40 FUSE T2A BD
F 991 2830091O60 FUSET 3.15AH 250V CD
K 901 287P049O30 RELAY-POWER
K 902 287P049O50 RELAY-POWER
PC951 268P068O10 PHOTO-COUPLER TCDT1124G
RP901 265P047O60 POSISTOR PTH451A102BF140M270A
Z 550 299P192O70 PROTECTOR 1000
Z 551 299P193O70 PROTECTOR 5000
Z 552 299P193O40 PROTECTOR 3150
Z 950 299P193O70 PROTECTOR 5000
Z 951 299P193O70 PROTECTOR 5000
Z 952 299P193O70 PROTECTOR 5000
Z 953 299P193O70 PROTECTOR 5000
Z 954 299P200O50 PROTECTOR 630
Z 9X1 299P193O70 PROTECTOR 5000
Z 9X2 299P193O70 PROTECTOR 5000
Z 9X3 299P193O70 PROTECTOR 5000
Z 9X4 299P193O70 PROTECTOR 5000
921C126O01 ASSY-PCB-AV
921C127O01 ASSY-PCB-PIP
921C128O01 ASSY-PCB-MGV
921C130O01 ASSY-PCB-MSP/DSP
921C131O01 ASSY-PCB-TEXT
921C132O01 ASSY-PCB-VIF
921C134O01 ASSY-PCB-DBF
921C136O01 ASSY-PCB-SVM
921C137O01 ASSY-PCB-CRT
921C138O01 ASSY-PCB-CONTROL
921C140O01 ASSY-PCB-AMP
921C141O01 ASSY-PCB-POWER-SUB CD
921C141O02 ASSY-PCB-POWER-SUB BD
9306746O01 ASSY-PCB-SIGNAL
9308747O01 ASSY-PCB-POWER
246C022O70 AC-POWER-CORD CD
246C162O10 AC-POWER-CORD BD
Adjustments
1.6.2 Lead dressing
• Leads must be dressed as shown in table 1
.4B and the diagram (fig. 1 .4C).
• The leads are routed or clamped so that they
do not come close to any heat generating or
high-tension parts.
• The anode lead wire is routed such that no
tension is applied to the anode cap. If the angle
and the route of the anode lead wire is changed,
return it to the initial angle and route.
table 1.4B
fig 1.4C
2 SERVICE ADJUSTMENT PROCEDURES
2.1 INTRODUCTION
Most service adjustments are made using the
remote control unit (fig 2.1A) with the TV in “Line
Mode”. Line mode consists of a series of
Service modes and IC adjustments:
Fig 2.1A The remote control buttons used in
Line Mode:
Fig 2. 1B Line Mode on-screen displays:
2.2 BASIC ADJUSTMENT PROCEDURE
2.2.1 Activating Line Mode
Press the MENU button on a remote control
then press buttons 2, 3, 5 and 7 in that order
within 4 seconds. (The screen will change to the
Line Mode display.)
2.2.2 Selecting a Service Mode or IC Adjustment
Press the * or C button on the remote control to
step through the various service modes or IC
adjustments.
2.2.3 Selecting and adjusting a Service or IC
Adjustment Item
1. Press the 2 or 8 button to select a specific
adjustment item: 2 = step up, 8 = step down.
2. Press the 4 or 6 button to change data value:
4 = decrease adjustment data, 6 = increase
adjustment data.
3. Press the 0 button to save the data to the
EEPROM memory. The display of characters
goes red for approximately three seconds in
this step.
Note: If the line mode is terminated without
pressing the 0, changes in data are not saved.
2.2.4 Terminating Line Mode
Press the 1 button on the remote control to
terminate line mode. Line mode can also be
terminated by turning the power off.
2.3 REPLACING THE EEPROM (IC702)
The EEPROM (IC702) stores the data specified
in Line Mode. When the EEPROM is replaced
all the data is initialized. After replacement
check the data is as shown in the Line Mode
Data Table.
Data in brackets ( ) are default values. The data
should be adjusted according to the adjustments specified in procedures 2.4 to 2.8. Other
data values need not be changed.
LINE MODE DATA TABLES - SERVICE
MODES: See Next Page.
2.4 VIF CIRCUIT
2.4.1 RFAGC
Conduct this adjustment for all the channels to
be received (field strength ≥75dBu at 75Ohms
load).
The adjustment is necessary both for the main
picture and the sub-picture in this model.
1. Supply an RF signal (off-air program).
2. Set the BOOSTER condition to ON in the
MANUAL PRESET menu.
3. Turn on AFT.
4. Observe the main picture.
5. Adjust VR101 so that the picture and the
sound have no beat, noise or intermodualtion
distortion.
6. Activate PIP and display the program on sub
picture screen.
7. Observe the sub picture
8. Adjust VR7101 so that the picture has no
beat, noise or intermodulation distortion.
2.5 DEFLECTION CIRCUITS - STAGE 1
2.5.1 Horizontal Centring
1. Supply a VIDEO signal (monoscope).
2. Set the picture format to 16:9.
3. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
4. Select the DEFLECTION CIRCUIT ALIGNMENT (* or C button).
5. Select item 1 — Horizontal Centre (2 or 8
button).
6. Adjust the data so that the positions of the left
and right markers are the same. (4 or 6
button).
7. Write the data into memory (0 button).
8. Terminate line mode (1 button).
Note: this adjustment is made with the picture
format set to 16:9. Adjustment in other picture
formats is not necessary.
2.5.2 Horizontal Width
1. Supply a VIDEO signal (monoscope).
2. Set the picture format to 16:9
3. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
4. Select the DEFLECTION CIRCUIT ALIGNMENT (* or C button).
5. Select item 2 — Horizontal Width (2 or 8
button).
6. Adjust the data so that the sum of the
markers is 2.8±0.2 (equivalent to 8±1%
overscan).
7. Write the data into the memory (0 button).
8. Terminate line mode (1 button).
Note: the adjustment is made with the picture
format set to 16:9 Adjustment in any other
picture format is not necessary.
2.5.3 Side PCC
1. Supply a VIDEO signal (crosshatch).
2. Set the picture format to 16:9.
3. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
4. Select the DEFLECTION CIRCUIT ALIGNMENT (* or C button).
5. Select item 3— PCC (PARABOLA) (2 or 8
button).
6. Adjust the data so that both the vertical lines
are straight (4 or 6 button).
7. Select item 5 — PCC (TRAPEZIUM) (2 or 8
button).
8. Adjust the data so that both the vertical lines
are straight (4 or 6 button).
9. Write the data into the memory (0 button).
10. Terminate line mode. (1 button).
Note: this adjustment is made with the picture
format set to 16:9. Adjustment in any other
picture format is not necessary.
2.5.4 Vertical Centring
1. Supply a VIDEO signal (monoscope).
2. Set the picture format to 16:9.
3. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
4. Select the DEFLECTION CIRCUIT ALIGNMENT (* or C button).
5. Select item 6— VERTICAL CENTRE (UPPER) (2 or 8 button).
6. Adjust the data so that the upper marker is 2
(4 or 6 button).
7. Select item 7— VERTICAL CENTRE
(LOWER) (2 or 8 button).
8. Adjust the data so that the lower marker is 2
(4 or 6 button).
MITSUBISHI CT-32CW1BD
Adjustments Cont’d
9. Write the data into the memory (0 button).
10. Terminate line mode (1 button).
Note: this adjustment is made with the picture
format set to 16:9. Adjustment in any other
picture format is not necessary.
2.6 CRT CIRCUIT
2.6.1 Focus
1. Supply a VIDEO signal (monoscope).
2. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
3. Select the FOCUS ALIGNMENT (* or C
button).
4. Observe the vertical lines and adjust FOCUSV control on the Flyback Transformer (T552)
for the best focus.
5. Observe the horizontal lines and adjust
FOCUS-H control on the Flyback Transformer
(T552) for the best focus.
6. Repeat steps 5 and 6 two or more times until
no further improvement is seen.
7. Terminate line mode (1 button).
2.7 VIDEO CIRCUIT
2.7.1 Screen Bias, Cut Off, White balance
Allow the set to warm up for twenty minutes or
more.
1. Supply a PAL VIDEO signal (white raster).
2. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
3. Make adjustments as shown in table 2.7A:
Table 2.7A
4. Select the SCREEN BIAS ALIGNMENT (* or
C button). The screen will change to display a
black picture.
5. Connect an oscilloscope to the cathode of
R684 and observe the waveform.
6. Adjust the SCREEN control on the flyback
transformer (T552) so that the waveform is as
shown in fig 2.7B:
2.7.2 Black Level
Note: this adjustment must follow adjustment
2.6.1 (Screen Bias, Cut Off, White balance).
1. Supply an RF signal (G-card).
2. Set the picture format to 16:9.
3. Select the VIDEO CIRCUIT ALIGNMENT - 1
(* or C button). Colour will be minimised
automatically.
4. Select item 1 BLACK LEVEL (2 or 8 button).
5. Adjust the data so that a difference in
brightness is just visible between the blue
area and the black area (4 or 6 button).
6. Write the data into memory (0 button).
Note: adjustment 2.6.3 (Sub Contrast) must be
performed immediately after this adjustment.
2.7.3 Sub Contrast
Note: this adjustment must follow adjustment
2.6.2 (Black Level).
1. Supply an RF signal (Colour-bar, 80%
Modulation).
2. Set the picture format to 16:9.
3. Select the VIDEO CIRCUIT ALIGNMENT - 1
(* or C button). Colour will be minimised
automatically.
4. Connect a DC milliammeter between pin 1
and 4 of connector LA on PCB-CRT (+ lead to
pin 1).
5. Select item 2 CONTRAST (2 or 8 button).
6. Adjust the data so that the DC milliameter
indicates 11 00±50uA (4 or 6 button).
7. Write the data into memory (0 button).
8. Terminate line mode (1 button).
2.8 CHROMA CIRCUIT
Note: perform this adjustment after the Cut Off,
White balance and Video circuit adjustments.
1. Supply a VIDEO signal (PAL Colour bar).
2. Connect an oscilloscope between TP6B on
PCB-CRT and ground.
3. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
4. Select the VIDEO CIRCUIT ALIGNMENT -2 (*
or C button).
5. Make adjustments as shown in table 2.8A:
Table 2.8A
6. Select item 1 COLOUR SATURATION (2 or 8
button).
7. Adjust the data so that the waveform is as
shown in figure 2.7B (4 or 6 button):
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
3. Make adjustments as shown in table 2.9:
Table 2.9
4. Select item 1 RIGHT BACKGROUND (4:3)
(2 or 8 button).
5. Adjust the data so that the reading of the right
marker is 2 (4 or 6 button).
6. Select item 2 LEFT BACKGROUND (4:3)
(2 or 8 button).
7. Adjust the data so that the reading of the left
marker is 2 (4 or 6 button).
8. Select item 3 LEFT BACKGROUND (14:9)
(2 or 8 button).
9. Adjust the data so that the reading of the left
marker is 2 (4 or 6 button).
10. Write the data into the memory (0 button).
11. Terminate line mode (1 button).
2.10 PIP CIRCUIT
1. Supply a VIDEO signal (monoscope).
2. Press the MENU button, select the PIP menu
and set the PIP style to 1. Press the DISPLAY
button and set the receiver to PIP mode.
3. Display a monoscope signal on the subpicture.
4. Press the MENU button on the remote control
(the MENU display will appear.) then press
buttons 2, 3, 5 and 7 in that order within 4
seconds. (The MENU display will change to
the Line Mode display.)
5. Make adjustments as shown in table 2.10A:
Table 2.10A
6. Select item 2 PIP HORIZONTAL POSITION
(2 or 8 button).
7. Adjust the data so that the readings of the left
and right markers are the same on the subpicture (4 or 6 button).
8. Using the * or C button select the IC Adjustment display PIP.
9. Select item 9 PSH (2 or 8 button).
10. Adjust the data so that the sub-picture
horizontal positions are adjusted as shown in
fig. 2.10B. Press the PIP POSITION button on
the remote control to select the PIP position
11. Write the data into memory (0 button).
12. Terminate line mode (1 button).
LINE MODE DATA TABLES - SERVICE MODES:
Fig. 2.7B
7. Make adjustments as shown in table 2.7C:
Table 2.7C
8. With a PAL signal supplied, adjust 1 R-GAIN
and 3 B-GAIN for PAL to obtain the best
white.
9. Supply a SECAM white raster signal.
10. Adjust 1 R-GAIN and 2 B-GAIN for SECAM
to obtain the best white.
Note: adjustment 2.6.2 (Black Level) must be
performed immediately after this adjustment.
Fig. 2.7B
8. Supply a VIDEO signal (NTSC colour bar).
9. Select item 2 HUE (2 or 8 button).
10.Adjust the data so that the waveform is also
as shown in figure 2.7B (4 or 6 button).
11.Write the data into memory (0 button).
12.Terminate line mode (1 button).
2.9 DEFLECTION CIRCUITS — STAGE 2
1. Supply a VIDEO signal (monoscope).
2. Press the MENU button on the remote control
Fig 2.10B
Continues next page.
MITSUBISHI CT-32CW1BD
Adjustments Cont’d
Continues next page.
MITSUBISHI CT-32CW1BD
Adjustments Cont’d
DBF Diagram
Remote Control Diagram
IC450
Diagram
MITSUBISHI CT-32CW1BD
Power Deflection Diagram
MITSUBISHI CT-32CW1BD
Power Supply Diagram
MITSUBISHI CT-32CW1BD
100Hz Signal Diagram
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