Panasonic KX-MB771GR Service Manual page 238

KX-MB771GR
16.2.3. MAIN BOARD (3)
1
180
R511
GND
7
A
XVIDEO
6
100 R501
XLDEN
5
100 R502
XAPC
4
5V
C504
3
GND
2
Z0.1u
XHSYNC
1
AP1
CN500
XVIDEO
TO LASER
+24V +3.3V XHSYNC
CN501
C501
Z0.1u/50V
AP1
Q503
1
C
POLCLK
B
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
LD
6 C
B
C SS
C
7
E Q502
CLK
8
BRAKE E
TO DC
MOTOR
LD
SS
CLK
BRAKE
+24V
24V
7
24V
6
GND
5
GND +7V
D 4
GND
3
7V
2
Q500
C
HTRCTL
1 B
AP1
E
CN504
TO SMPS
+24V
E
24V
7
GND
6
L503
CHG
5
DEV
C
4 B
TRS
E
3
Q501
HVERR
2
CVR
1
AP1
CN505
TO HVPS
F
2
L500
15BD471
1:3D
+5VD
1:1E
1:1E
1:3F
388µs
XLDEN
XAPC
1:3E
1:3D
B
Q505
C
B 1:3D
E
POLCLK
( 3.86kHz)
XREADY
POLON
+24V
R515
1:1D
1:1D
B
1:1D
Q525
Q526
C
B 1:1D
E
+5VD
IC501
5 1
CONTROL
VIN
2
GND
4 3
NC
VOUT
1:1E
HTRCTL
C
B 1:3D
+3.3V
C
E Q506
1:3D
B
E
Q504
1:3D
R520
1:3D
1k
1:3F
C
82k R516 B
E
Q507
KSTART
KTXD
KSCLK
3
PICK-UP
NVIDEO SOLENOID
CN507
AP1
NLDEN
1
PICK
NAPC
2
PG
NHSYNC
REGISTER
SOLENOID
CN514
AP1
1
REG
NREADY
2
PG
POLCLK
POLON
+3.3V
TO FAN
FANON
3
DET
2
GND
1
AP1
CN506
MMB
MMXA
MMA
MMXB
+3.3V
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
HVERR THRM
2
TOPCVR
KSTART
3
KTXD
4
C557
KSCLK
5
OPERST
J180p
6
GND
7
C555
5V
Z0.1u
8
BUZZER(NC)
KX-MB771GR SCHEMATIC DIAGRAM (MAIN BOARD No.3) (1/2)
625KHZ
238
4
+24V
S
R528
Q509
Q511
G
39k
C
D
B
E
+24V
Q523
E
R574
B
Q524
8.2k(2125)
C
C
B
E
+24V
Q510 E
R532
B
Q512
C
C 4.7k(3216)
B
R525
E
R531
39(1/2W)
5.6k
+3.3V
R583 5.6k
R585
5.6k
R527
5.6k
+24V
+3.3V +3.3V
E
Q520
C
R530
39(1/2W)
R570
5.6k
+3.3V
R562 1k
1:1E
THRMSTR0
R563 100 1:3E
KSTART
R559 100 1:3E
KTXD
R560 180 1:3E
KSCLK
R561 1k 1:3E
OPERST
+5VD
R591 1:1E;4:1D
( ) DAOUT
NC
5
1/2
3
-1
1:3D
SNPICK
1:3D
SNREG
1:1D
FANON1
1:3E
FANDET1
1:3E
REGIST
1:3F
PSTART
1:3E
TNR
R565
B
Q519
C
4.7k(3216)
1:1D
B
FANON2
E
1:3E
FANDET2
R580
1:3E
PICK
5.6k
R509
1k
1:1E
THRMSTR1
1:3E
POUT
R510
5.6k