Panasonic KX-MB783BR Service Manual page 242

KX-MB783BR
16.2.3. MAIN BOARD (3)
1
180
R511
GND
7
A
XVIDEO
6
100 R501
XLDEN
5
100 R502
XAPC
4
5V
3 C504
GND
2
Z0.1u
XHSYNC
1
AP1
CN500
XVIDEO
TO LASER
+24V +3.3V XHSYNC
CN501
C501
Z0.1u/50V
AP1
1 Q503
C
B POLCLK
2
XREADY
E
3
POLON
4
GND
5
24V
TO POLYGON
CN502
AP1
L502
1
24V
2
+3.3V
24V
3
PG
4
PG
5 1k
C
LD
6 B
C
SS
C
7
E Q502
CLK
8
BRAKE
E
TO DC
MOTOR
LD
SS
CLK
BRAKE
+24V
24V
7
24V
6
D
GND
5
GND
+7V
4
GND
3
7V
2
Q500
C
HTRCTL
1 B
AP1 E
CN504
TO SMPS
E
+24V
24V
7
GND
6
L503
C
CHG
5
DEV E
C
4 B
TRS
3
E
Q501
HVERR
2
CVR
1
AP1
CN505
TO HVPS
F
2
L500
1:3D
+5VD
1:1E
1:1E
1:3F
388µs
XLDEN
XAPC
1:3E
B 1:3D
Q505
C
1:3D
B
E
POLCLK
( 3.86kHz)
XREADY
POLON
+24V
R515 1:1D
1:1D
1:1D
B
Q525
Q526
C
1:1D
B
E
+3.3V
+5VD
IC501
5 1
CONTROL
VIN
2
GND
4 3
NC
VOUT
1:1E
HTRCTL
C
B 1:3D
+3.3V
E Q506
1:3D
B
Q504
1:3D
R520
1:3D
1k 1:3F
C
82k R516 B
E
Q507
KSTART
KTXD
KSCLK
3
PICK-UP
NVIDEO SOLENOID
CN507
Q509
AP1
NLDEN
1
PICK
NAPC
2
PG
NHSYNC
REGISTER
SOLENOID
CN514 Q523
AP1
1
REG
NREADY
2
PG
POLCLK
POLON
+3.3V
TO FAN
FANON
3
DET
2
GND
1
AP1
CN506
MMB
MMXA
MMA
MMXB
SENSOR Transit
REG
10
PTOP
9
TNR
8
PICK
7
FANDET
6
FANON
5
GND
4
+5VD
THRM1
3
5V
2
POUT
1
CN508
CHG
+3.3V
TO OPE
DEV
CN511
TRS
AP1
1
THRM
HVERR
2
TOPCVR
KSTART
3
KTXD
4
C557
KSCLK
5
OPERST
J180p
6
GND
7 C555
5V
Z0.1u
8
BUZZER(NC)
625KHZ
KX-MB783BR SCHEMATIC DIAGRAM (MAIN BOARD No.3) (1/2)
242
4
+24V
S
R528
Q511
G
C
39k
D
1:3D
B
E
+24V
E
R574
B
Q524
C
8.2k(2125)
C
1:3D
B
E
+24V
E
Q510 R532
B
Q512
C
4.7k(3216)
C
1:1D
B
R525
E
R531 1:3E
39(1/2W)
5.6k
+3.3V
R583 5.6k
R585 5.6k
R527 5.6k
+24V
+3.3V +3.3V
Q520
E
B
C
R530
39(1/2W)
R570
5.6k
+3.3V
R509
R510
R562 1k 1:1E
THRMSTR0
1:3E
R563 100
KSTART
1:3E
R559 100
KTXD
1:3E
R560 180
KSCLK
1:3E
R561 1k
OPERST
+5VD
R591
1:1E;4:1D
( ) DAOUT
NC
5
1/2
3
SNPICK
-1
SNREG
FANON1
FANDET1
1:3E
REGIST
1:3F
PSTART
1:3E
TNR
R565
Q519
4.7k(3216) C
1:1D
B
FANON2
E
1:3E
FANDET2
R580
1:3E
PICK
5.6k
1k
1:1E
THRMSTR1
5.6k 1:3E
POUT