Panasonic WV-CM1020 Service Manual ▷ View online
– 6 –
(10). Focus Coarse Adjustment
Adjust:
FOCUS control
Flyback Transformer on the Main Board
Observe:
Colour Video Monitor
8
Supply the Cross Hatch signal or the Dot signal to the
Video Input Connector.
8
Adjust the FOCUS control for the best focus.
(11). Purity Adjustment
Adjust:
Purity Magnet
Deflection Coil
Observe:
Colour Video Monitor
8
This adjustment should be done after aging for more than
20 minutes.
8
Adjust the FOCUS control on the Flyback Transformer for
the best focus and then disconnect the input signal.
8
Degauss the CRT screen with a degaussing coil.
8
Loosen the screw that secure the deflection coil.
8
Move back the deflection coil until it reaches to the purity
magnet.
Fig. 4-6
8
Supply the red colour signal to the Video Input Connector.
8
Adjust the purity magnet so that the red area comes to the
center on the CRT screen as shown in Fig. 4-7.
Fig. 4-7
8
Rotate the deflection coil to find the point where the center
portion of the red area becomes equal on the CRT screen.
8
Move the deflection coil forward until the red colour fully
occupies the entire screen and tighten the screws that
secure the deflection coil.
(12). Convergence Adjustment
Adjust:
Convergence magnet-1
Convergence magnet-2
Observe:
Colour Video Monitor
8
Supply the Cross Hatch signal or the Dot Signal to the
Video Input Connector.
8
Adjust the FOCUS control on the Flyback Transformer for
the best focus.
8
Degauss the CRT screen with a degaussing coil.
8
Adjust the Convergence magnet-2 so that the red and
blue dots on the center area of the CRT screen is
overlapped.
8
Adjust the Convergence magnet-1 so that the green and
magenta (red+blue) dots on the center area of the CRT
screen is overlapped.
8
Repeat above adjustment until no discrepancy appears on
the entire screen.
(13). White Balance Adjustment
Adjust:
CUTOFF R
Increment Button (+)
Decrement Button (–)
CUTOFF B
Increment Button (+)
Decrement Button (–)
DRIVE R
Increment Button (+)
Decrement Button (–)
DRIVE B
Increment Button (+)
Decrement Button (–)
Observe:
Colour Video Monitor
8
Supply the White Colour signal or the Dot Signal to the
Video Input Connector.
8
Select the MENU Button to the W/B MENU.
8
Select the Cursor Buttons (
i
) or (
o
) to the CUTOFF R,
CUTOFF B, DRIVE R or DRIVE B position.
8
Adjust the Increment Button (+) or Decrement Button (–)
so that the raster on the CRT Screen becomes White.
(14). Sub Bright Adjustment
Adjust:
STD BRIGHT
Increment Button (+)
Decrement Button (–)
Observe:
Colour Video Monitor
8
Supply the Grayscale signal to the Video Input Connector.
8
Isolate the CRT screen from the outside light source.
8
Select the MENU Button to the SUB MENU.
NO GOOD
GOOD
RED
RED
Deflection coil
Deflection coil fixing screw
Purity magnet
Convergence magnet-1
Convergence magnet-2
– 7 –
8
Select the Cursor Buttons (
i
) or (
o
) to the STD BRIGHT
position.
8
Adjust the Increment Button (+) or Decrement Button (–)
so that the first step from the black side is just
suppressed.
8
Select the MENU Button to the DEF MENU.
8
Select the Cursor Buttons (
i
) or (
o
) to the ABL IN
position for saving data.
(15). H & V Centering and Size Fine Adjustment
Adjust:
VR401 (V-SIZE)
Main Board
VR403 (V-CENTER)
Main Board
L502 (H-SIZE)
Main Board
H-CENTER
Increment Button (+)
Decrement Button (–)
Observe:
Colour Video Monitor
8
Supply the Monoscope Pattern signal to the Video Input
Connector.
8
Select the MENU Button to the DEF MENU.
8
Select the Cursor Buttons (
i
) or (
o
) to the H–CENTER
position.
8
Adjust VR403 so that the Monoscope Pattern signal
positions at the vertical center on the CRT screen.
8
Adjust VR401 so that the full vertical height becomes plus
6 % overscanning.
8
Ajust L502 so that the full horizontal width becomes plus 8
% overscanning.
8
Adjust the Increment Button (+) or Decrement Button (–)
so that the screen is set to the horizontal center position.
8
Repeat above adjustment until they are satisfied.
8
Select the MENU Button to the ADJ MENU.
8
Select the Cursor Buttons (
i
) or (
o
) to the MENU END
position.
8
Press the Increment Button (+) or Decrement Button (–)
for saving data.
8
Turn the Power Switch off.
MAIN BOARD (COMPONENT SIDE)
CRT BOARD (COMPONENT SIDE)
CN901
(INLET)
JK601
(PIN JACK)
CN101
(BNC)
CN102
(BNC)
VR403
(V-CENTER)
(V-CENTER)
VR401
(V-SIZE)
(V-SIZE)
FOCUS SCREEN
VR201
(COMB-1)
CN806
L205
(COMB-2)
L502
(H-SIZE)
(H-SIZE)
T901 (SW TRANS)
CN601
CN801
CN802
CN804
CN805
SW303
( +)
( +)
SW304
(–)
(–)
SW301
(UP)
(UP)
SW302
(DOWN)
(DOWN)
SW305
(MENU)
(MENU)
SW101
(A/B INPUT SW)
(A/B INPUT SW)
SW901
(POWER SW)
(POWER SW)
T502 (FBT)
R804
TP802 (G)
TP802 (G)
D801
TP804 (120V)
R802
TP801 (R)
TP801 (R)
R806
TP803 (B)
TP803 (B)
CN902
CN401
CN301
Q118
Q112
REAR SIDE
FR
ONT SIDE
L205 and VR201 are
only for NTSC.
only for NTSC.
– 8 –
LOCATION OF TEST POINTS AND ADJUSTING CONTROLS
+ -
VIDEO A
PRE-AMP.
Q101
75
Ω
CN101
IN
OUT
VIDEO A
Q102
75
Ω
IN
OUT
VIDEO B
CN102
Q103
3
1
IN2
IN1
BIAS
30K
30K
2
BUFFER
OUT
7
IC101
2-INPUT SINGLE
VIDEO SWITCH
2-INPUT SINGLE
VIDEO SWITCH
Q202,203
SYNC
SEPARATOR
3
4
5
6
4
5
6
FEEDBACK
MUTE
VR
CONST
MUTE
DC VOLUME
CONTROL
AUDIO
OUTPUT AMP.
A OUT
A IN
IN
OUT
AUDIO
JK601
IC601
AUDIO OUTPUT CONTROLLER
AUDIO OUTPUT CONTROLLER
2
SP601
CN601
1
SPEAKER
(8
(8
Ω,
0.6 W)
+9V
V
REF
+
–
OUT
GND
IN
1
2
3
1
CN902
L1
DEGAUSSING
COIL
COIL
1
2
CN901
LINE
FILTER
L901
F901
4A
L
N
POWER
SW901
POWER
SWITCH
SWITCH
~
~
+
–
D901
4
2
7
6
9
11
13
12
T901
Q901-905
POWER
TRANSFORMER
TRANSFORMER
POWER
CONTROL
AMP.
Q906,907
Q910,911
+12V
+9V
REG.
IC901
+9V
+5V
REG.
Q909
+5V
(POWER)
D910
SIGNAL
CLAMPING
PRE-AMP.
LINE
MEMORY
LINE
MEMORY
LP
R-Y OUT
R-Y IN
ADDITION
STAGE
STAGE
OUTPUT
BUFFER
BUFFER
SIGNAL
CLAMPING
PRE-AMP.
SAMPLE-
AND-HOLD
SAMPLE-
AND-HOLD
LP
B-Y OUT
B-Y IN
3MHz SHIFTING CLOCK
SANDCASTLE
DETECTOR
FREQUENCY
PHASE
DETECTOR
DIVIDER
BY 192
SAND
LP
6MHz
CCO
DIVIDER
BY 2
IC102
BASEBAND DELAY LINE FOR 1H DELAY
BASEBAND DELAY LINE FOR 1H DELAY
(PAL ONLY)
11
12
16
14
5
ON SCREEN DISPLAY CIRCUIT
DISPLAY
MEMORY
CHARACTER
ROM
JITTER
ELIMINATION
4
OSD (R)
5
OSD (G)
6
OSD (B)
7
OSD (Y/B)
P6
P7
#HD
#VD
HD IN
VD IN
0
1
R,G,B
Y/BL
ALU
PSW
FLUG RBS
STACK POINTER
DATA
MEMORY
(RAM)
GENERAL
REGISTER
BANK
PROGRAM
CORRECTION
CIRCUIT
PROGRAM
COUNTER
PROGRAM
MEMORY
(ROM)
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
INTERRUPTION CONTROL CIRCUIT
TC3
TC4
8-BIT
TIMER
COUNTER
SIO/I CBUS
TC2
SERIAL BUS
INTERFACE
SYSTEM
CONTROL
CIRCUIT
STANDBY
CONTROL
CIRCUIT
TIMING
GENERATOR
FOR
HIGH
FREQ.
CLOCK
GENERATOR
TIME
BASE
TIMER
WATCH
DOG
TIMER
2
16-BIT
TIMER
TC1
P3
REM-CON
JUDGEMENT
CIRCUIT
P6
8-BIT A/D
CONVERTER
P5
D/A
CONVERSION
(PWM)OUTPUT
P4
P2
0
10/17 SW
0
A
U
DIO ADJ
1
+B ADJ
2
MENU ADJ
3
KEY SW1(UP)
4
5
6
7
MENU SW
KEY SW2(DO
WN)
KEY SW3(-)
KEY SW4(+)
0
PO
W OFF
1
2
A/B OUT
3
VD IN
4
5
6
7
SYNCIN
ABL IN
SW1
SW2
C/L,B/W OUT
0
1
2
3
V
-MUTE
A-MUTE
SIG OUT
B
U
ZZER
C/L,B/W IN
AFC SELECT
FA
SCL
SD
A
A/B IN
0
1
2
3
4
5
OSC1
OSC2
OSC2
#RESET
TEST
X IN
X OUT
IC302
8-BIT MICROCOMPUTER WITH BUS
8-BIT MICROCOMPUTER WITH BUS
28
29
29
33
30
31
32
X301
8 MHz
HORIZONTAL
DRIVER
Q105,106
OSD OUTPUT
BUFFER
Q118
27
26
25
24
23
22
34
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
35
36
37
38
39
40
41
AFC
DRIVER
Q117
Q119,120
VERTICAL
DRIVER
SW301
KEYSW1
(UP)
SW302
KEYSW2
(DOWN)
SW304
KEYSW3
(–)
SW303
KEYSW4
(+)
SW305
MENUSW
–AUDIO+
MENU
SW301,302
CURSOR
BUTTONS
VDD
+12V
R322
(NTSC
ONLY)
(NTSC
ONLY)
R320
(PAL
ONLY)
(PAL
ONLY)
R323
(NTSC ONLY)
(NTSC ONLY)
R321
(PAL ONLY)
(PAL ONLY)
INPUT
SW101
A
B
INPUT SIGNAL
SELECT SWITCH
SELECT SWITCH
V
REF
+
–
OUT
GND
IC304
VOLTAGE DETECTOR
FOR MUTE RESET
VOLTAGE DETECTOR
FOR MUTE RESET
IN
1
2
MUTE
CONTROL
DRIVER
Q302
AUDIO
MUTE
DRIVER
Q303
VIDEO
MUTE
DRIVER
Q304
1024-BIT EEPROM ARRAY
ADDRESS
DECODER
7-BIT
DATA
REGISTER
8-BIT
SLAVE WORD
ADDRESS REGISTER
STOP
START
CONTROL
CIRCUIT
HIGH
VOLTAGE
GENERATOR
POWER
VOLTAGE
DETECT
SCL
SDA
SDA
A0
A1
A2
TEST
1
2
3
5
6
7
IC303
128x8-BIT EEPROM WITH BUS
128x8-BIT EEPROM WITH BUS
SCL 1
CN301
SDA 3
FA 4
B-Y
AMP.
Q108
R-Y
AMP.
Q107
(NTSC ONLY)
R-Y
CLAMP
G-Y
CLAMP
B-Y
CLAMP
BRIGHTNESS
∗
8-BIT
G-Y
CHROMA
CONTRAST
SATUR-
ATION
∗
7-BIT
R
DRIVE
CUTOFF
G
CUTOFF
(8-BIT)
B
DRIVE
CUTOFF
YS
PULSE
∗
DRIVE 8-BIT
∗
CUTOFF 9-BIT
Y
CLAMP
BLACK
EXPANSION
Y
CONTRAST
LPF
∗
1-BIT
(SER
VICE)
SHARPNESS
TRAP
CV
CLAMP
∗
1-BIT
∗
6-BIT
∗
7-BIT
7dB
VSW
∗
1-BIT
APC
ACC
DET.
DET.
ACC
AMP.
TINT
NTSC
AMP.
BPF
∗
1-BIT
CHROMA SW
CW
GENERATE
R-Y
DEMOD.
+/–
B-Y
DEMOD.
KILLER
IDENT
1H
FF
FF
CHROMA
VCO
∗
1-BIT
∗
1-BIT
SYSTEM
SW
∗
1-BIT
∗
2-BIT
(50/60Hz)
VERTICAL
COUNT
DOWN
HV
BLK.
VERTICAL
SYNC SEPA
HORIZONTAL
SYNC SEPA.
50/60Hz
DETECT
HORIZONTAL
COUNT
DOWN
HORIZONTAL
LOCK DET.
AFC1
AFC2
HVCO
H
REGU.
H
BLK.
BGB
SHUT
DOWN
VERTICAL
OUT
SCP
I C BUS
INTERFACE
2
DAC OUT
SW OUT
SW OUT
IF
AMP
VIF
DET.
IF
AGC
AFT
RF
AGC
LEVEL
ADJ.
APC2
PHASE
SHIFT
APC1
∗
9-BIT
VCO
∗
7-BIT
∗
4-BIT
SIF
DET.
VCO
DE-
EMPHASIS
PRE-
AMP.
LIMITER
∗
1-BIT
∗
1-BIT
ASW
1 R-Y CLAMP
G-Y CLAMP
2
B-Y CLAMP
3
EXT RIN
11
12 EXT GIN
13 EXT BIN
12 EXT GIN
13 EXT BIN
10 YS IN
9
9
SPOT KILLER
6
CHROMA APC
8
VCO(3.58MHz)
7
VCO(4.43MHz)
+9V
63
64
–(B-Y) IN
–(R-Y) IN
NTSC : 3.58MHz
PAL :
PAL :
4.43MHz
X102
–(B-Y) OUT
–(R-Y) OUT
61
60
59
SECAM INTERFACE
5
KILLER OUT
4
KILLER FILTER
62
SANDCASTLE PULSE OUT
21 SDA
22 SCL
22 SCL
IC103
SIGNAL PROCESSOR WITH BUS INTERFACE
SIGNAL PROCESSOR WITH BUS INTERFACE
24
VIF1 IN
25
VIF2 IN
33
EXT AUDIO IN
34
∗
7-BIT
27
AFT OUT
30
SIF APC
37
RF AGC OUT
SIF IN/
DAC OUT
VIF VOC
41
VIF APC1
40
VIF DET OUT
39
IF AGC
35
OUT
28
DE-EMPHASIS
29
DC DECOUPLING
32
AUDIO
58
VER PULSE OUT
55
X-RAY PROTECT IN
56
OUT
50
FBP IN
52
AFC2
51
VCC2
54
HOR VCO
53
AFC1
18
HOR LOCK DET
44
VER SYNC CLAMP
45
VER SYNC IN
46
HOR SYNC IN
57
50/60Hz DET OUT
48
43
Y IN
20
ACL
42
BLACK LEVEL
38
INT VIDEO IN
36
VIDEO OUT
31
EXT VIDEO IN
17
B OUT
16
G OUT
15
R OUT
CHROMA
IN
HOR PULSE
+9V
X101
(PAL ONLY)
J102
SYNC
SEPARATOR
Q206
G
R
B
J101
(PAL ONLY)
L205
COMB-2
COMB-2
VR201
COMB-1
Q209-212,L204
(NTSC ONLY)
HORIZONTAL
DEFLECTION
DRIVER
T501
HORIZONTAL
DEFLECTION
OUTPUT
Q501
Q502
R
OUTPUT
BUFFER
Q801
G
OUTPUT
BUFFER
Q802
B
OUTPUT
BUFFER
Q803
TP801
(R)
TP802
(G)
TP803
(B)
7
9
3
V801
CATHODE
RAY TUBE
5
4
6
8
H(+)
H(
–)
G1
G2
+9V
RK
GK
BK
CN803
CRT SOCKET
GND
CRT BOARD
3
9
8
2
1
5
6
4
FLYBACK TRANSFORMER
T502
SF501
FOCUS
CONTROL
CONTROL
SCREEN
[FOCUS]
+120V
(ANODE)
HV
PROTECTION
Q503,504
10
1 H+
2 H–
3 V+
4 V–
HORIZONTAL
VERTICAL
CN401
DEFLECTION
COIL
COIL
L401
L502
H.SIZE
L501
H.LIN
VERTICAL
OUTPUT
VERTICAL
DRIVE
RAMP
GENERATOR
ONE SHOT
MULTI.
VERTICAL
TRIG INPUT
V.TRIG-IN
THERMAL
PROTECTION
VERTICAL SIZE
CONTROL
SWITCH
PUMP UP
RAMP
50Hz/
60Hz
-SW
V.SIZE
AC/DC FB-IN
PUMP
UP-OUT
VERT-OUT
PHASE
-ADJ
+9V
6
10
4
9
7
12
5
VR401
V.SIZE
V.SIZE
VR403
V.CENTER
V.CENTER
2
J401
(NTSC ONLY)
(NTSC ONLY)
J402
(PAL ONLY)
(PAL ONLY)
MAIN BOARD
CN101
VIDEO A
INPUT/OUTPUT
CONNECTORS
VIDEO A
INPUT/OUTPUT
CONNECTORS
CN102
VIDEO B
INPUT/OUTPUT
CONNECTORS
VIDEO B
INPUT/OUTPUT
CONNECTORS
VIDEO B
PRE-AMP.
SW
"L" : IN1
"H" : IN2
"H" : IN2
Q121
VIDEO A
INPUT
DRIVER
VIDEO B
INPUT
DRIVER
Q104
VIDEO A
MUTE
AUDIO
CONTROL
DRIVER
Q602
8
VDD
IC301
VOLTAGE DETECTOR
FOR SYSTEM RESET
VOLTAGE DETECTOR
FOR SYSTEM RESET
AC CONNECTOR
POWER
SWITCHING
REGULATOR
1
2
POWER
INDICATOR
INDICATOR
E
AC IN
L E N
E1
POWER
CABLE
POWER
CABLE
NTSC : 120V 60Hz
PAL
PAL
: 220 - 240V 50Hz
POWER
CONTROL
DRIVER
Q908
PROTECTION
CONTROL
DRIVER
+120V
SW305
MENU
BUTTONS
SW304,303
INCREMENT/
DECREMENT
DECREMENT
BUTTONS
PAL/
NTSC
/SECAM
SW
∗
7-BIT
∗
4-BIT
ACK
7-BIT
X101
15.625 kHz
R241
(PAL ONLY)
(PAL ONLY)
R157
(NTSC
ONLY)
(NTSC
ONLY)
EXT
VIDEO
BUFFER
COMB FILTER/
1H DELAY
Q112
+120V
0.63A
SCREEN
CONTROL
CONTROL
SWITCHING
TRANSFORMER
TRANSFORMER
IC401
VERTICAL
DEFLECTION
DRIVER
VERTICAL
DEFLECTION
DRIVER
TIME CONST 3
Q208
INT VIDEO
BUFFER
NOTE : marked connection terminals are not activite (used).
Y
INPUT
AMP.
Q115
VIDEO
OUTPUT
CONTROL
Q116
JK601
AUDIO
INPUT/OUTPUT
CONNECTORS
AUDIO
INPUT/OUTPUT
CONNECTORS
BLOCK DIAGRAM
– 9 –
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