Pioneer PDP-502MX Service Manual page 34

1
PDP-502MX, PDP-502MXE
3.3.7 Y DRIVE ASSY SECTION
A
SCAN BLOCK
R3752
B
OE
44
SI 42
CLK 40
LE
38
CLR 36
LBLK 34
HBLK 32
30
YSUS-B
YSUS-U 28
YSUS-D 26
YSUS-G 24
YNR-D 22
YNR-U 20
YSUS-MSK 18
YCP-MSK
16
OFS
14
MUTEY 4
YSUSPD 46
" L " for 1 sec = PD
C
1
+5V
3
+12V
8
VFY+
9
VFY–
VYZ+ 10
VYZ–
11
DRV PD 12
DC PD 13
+14V 5
–8V 6
VSUS
D852
175V
VSUS 1
D759
SUS GND 4
SUS
GND
VSUS
10
+10V
D763
D709
D710
D
D809
D813
34
1
2
OE
K3760
SI
K3764
CLK
K3765
8
4
3
2
1
LE
IC3752 (1/2)
K3766
(TC74VHC541)
CLR
K3767
IC3753 (1/2)
(TC74VHC541)
2
3
R3755
IC3753 (2/2)
4 16
5 15
6 14
7 13
IC3757
8 12
9 11
R3756
R3761
IC3752
(2/2)
R3781
+5V
7
5
YSUS STOP
Q3751
PD
IC3752
K854
IC5V OVP
VSUS
K754
Q752
VH OVP
Q755
K751 VSUS
VH UVP
K706
VOFS OVP
Q701
K705 SUS GND
VOFS UVP
VSUS
K804
VRN OVP
Q802
K801
VRN UVP SUS
Q805
GND
DC–DC CONVERT BLOCK
2
3
IC5V
IC3660
5
IC3654
5
IC3655
5
IC3656
5
IC3657
5
IC3658
5
IC3659
5
IC3755
(PDT043A)
(TC74ACT541)
R3760
SUS-B
2 14
SUS-U
15
3
SUS-D
16
4
SUS-G
5 17
YCP-MSK
18
8
YSUS-MSK
9 13
OFS
12
6
YNR-D
19
7
11
MUTE
D3751
IC5V
D853
–8V
IC5V
K851
+
14V DC–DC CONV.
IC852, IC853
T851
VH
D753
VH DC–DC
+
CONV.
IC755, IC752
T751
PSUS
VOFS
K702
VOFS
DC–DC CONV.
+
D702
IC701, IC704
T701
K803
D803
VRN
+
SUS
DC–DC CONV.
GND
IC802, IC803
T801
K802
VRN
(–180V)
3
VH
H9 H8 H7
60 60 60
IC5V
43 43 43
PSUS
30 30 30
31 31 31
SI DATA
1 1 1
IC3751
13
14
15
16
17
12
18
11
VFZ+
IC3804
+ 5V
REG.
IC3803
R3820 5
OFS
K3756
K753
OFS BLOCK
K855
S701: ON
S701
OFF= Noise at high temp.
ON
TEMP COMPENSATION
VOFS
K701
SUS
GND
VRN
4
H6
60
43
30
31
1
Q3802
R3822
R3823
7
R3824
R3825
5
IC3801
Q3804
R3826
–R
4