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8 Block Diagrams
CKB5237L
CKB5237L/7227L 8-1
H/V
+210V
+30V
+12V
CONTRAST
CONTROL
BRIGHTNESS
CONTROL
CRT
VIDEO OUTPUT
R G B
CRT SOCKET BOARD
SOCKET
IC102(LM2405T)
SK1
R G B - CUTOFF
ICONTROL(IC103)
G1
SCREEN
FOCUS1
MAIN BOARD
HEATER
High Voltage
CN301
CN300
VER. - DY
VER. OUTPUT
V-SYNC
FBT
CONTROL
IC501
IC300
HOR./VER. OSC
T501
High Voltage
CONTROL
OUTPUT
High Volt.-DRIVE
Q512
PROCESSOR
(TDA9109)
HOR.-DY
CN400
CN401
HOR.- OUT
Q406
HOR.-DRIVE
Q403
IC302
ACL
CIRCUIT
CN402
CONTRAST
CONTROL
G1
H-DEF.
TRANS
T402
HOR.-DEF.
STEP-UP
VER.-BLANKING
GENERATOR
(Q301)
BRIGHTNESS
CONTROL
+12V
TO VIDEO
+75V
+45V
SWITCHING
-210V
( FROM FBT)
PS1,PS2 (FROM Micom)
+12V REGULATION
+13V
TRANS.
VER. OUTPUT & TILT CONTROL
-12V
T601
HEATER
CRT HEATER
POWER-OFF MODE CONTROL
+7V
PS-2
(Q601, Q602)
H-SYNC,
RECTIFIER
(D600,D602,
L600/L602
LINE FILTER
AC-INLET
SOCKET
CN603
D603,D604)
VIDEO BOARD
Video Pre-Amp
IC101(KA2143)
R G B
S/Cable INPUT
OSD DRIVE CONTROL
IC104(LSC4390)
H-SYNC, V-SYNC
FRONT CONTROL BOARD
H-SYNC1
V-SYNC1
SDA
SCL
H-SIZE
MICOM
IC202
MENU EXIT
BRIGHTNESS
CONTRAST
I-SENSE
ENTER
REGIN
LED
POWER
V-MUTE
S-CORRECTION
LED
PS-1 (SUSPEND)
PS-2
2
EPROM
(24LC04B)
IC205
TILT
(POWER-OFF)
DEGAUSSING
BLOCK
TO D - COIL
PWM CONTROL &
SWITCHING FET
IC602
RL601
ON THE CRT
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CKB7227L
8 Block Diagrams
8-2 CKB5237L/7227L
H/V
–210V
+30V
+12V
CONTRAST
CONTROL
BRIGHTNESS
CONTROL
CRT
R G B
CRT SOCKET BOARD
SOCKET
SK1
G1
SCREEN
FOCUS1,2
MAIN BOARD
HEATER
High Voltage
CONTROL
VER. - DY
CN300A
VER. OUTPUT
FBT
T501
IC501
High Voltage
IC300
High Volt.-DRIVE
HOR./VER. OSC
PROCESSOR
CONTROL
OUTPUT
Q512
(TDA9109)
IC302
ACL
CN400
CN402
HOR.-DY
HOR.- OUT
Q406
HOR.-DRIVE
Q403
CIRCUIT
H-DEF.
TRANS
HOR.-DEF.
VER.-BLANKING
GENERATOR
CONTRAST
CONTROL
G1
T402
STEP-UP
(Q301)
BRIGHTNESS
CONTROL
+12V
TO VIDEO
+75V
+45V
-210V
( FROM FBT)
PS-2
PS1,PS2 (FROM Micom)
+12V REGULATION
+13V
HEATER
CRT HEATER
VER. OUTPUT & TILT CONTROL
+7V
-12V
POWER-OFF MODE CONTROL
(Q601, Q602)
VIDEO OUTPUT
IC102(LM2405T)
R G B - CUTOFF
ICONTROL(IC103)
VIDEO BOARD
Video Pre-Amp
IC101(KA2143)
R G B
S/Cable INPUT
OSD DRIVE CONTROL
IC104(LSC4390)
H-SYNC, V-SYNC
V-SYNC
H-SYNC,
FRONT CONTROL BOARD
H-SYNC1
V-SYNC1
SDA
SCL
H-SIZE
MICOM
IC202
MENU EXIT
BRIGHTNESS
CONTRAST
I-SENSE
ENTER
REGIN
LED
POWER
V-MUTE
S-CORRECTION
LED
PS-1 (SUSPEND)
PS-2
2
EPROM
(24LC04B)
IC205
SWITCHING
TILT
(POWER-OFF)
DEGAUSSING
BLOCK
TO D - COIL
ON THE CRT
TRANS.
T601
PWM CONTROL &
SWITCHING FET
IC602
RL601
RECTIFIER
(D600, D601,
L600/L602
LINE FILTER
AC-INLET
SOCKET
CN603
D603,D604)