Sony VPL-PX20 Service Manual page 164

• Refer to page 9-28 for Printed Wiring Board
• Refer to page 9-28 for Waveforms
• Refer to page 9-31 for IC Block Diagrams
MCLK
(P1,2)
MCLK
SCL1
(P1) SCL
SDA100K
C728
R1623
#
# JL611
#
JL610
JL672 #
4.9 2.8 4.9
# TH600
13 12 11 10 R1641
R1624
0
IC626(6/6) 100
SHORT
1/16W
TC74VHC14FT
:CHIP
INV IC626(5/6)
C640 8
R1625
0.01 TC74VHC14FT
#
CN605
25V
INV 2 6
70P B:CHIP
TO BC CN501
IC618(1/2) 1
IC618(2/2)
#
PANEL TEMP A1
#
TP616
4
GND B1
5 3
SDA100K A2
JL603 R1642
B2
SCL100K R1628 #
7
TP617 #
GND A3
JL632
GND B3 R1637
# #
ECLK A4
IC615(3/8)
B4 TC74VHCT541AFT
HCK1
BUFF
4
ECLK A5
IC614(4/8)
HCK1 B5 TC74VHCT541AFT
BUFF
5
GND A6
IC614(8/8)
B6 TC74VHCT541AFT
HCK2
BUFF
BLK A7
HCK2 B7
IC615(5/8)
DWN A8 TC74VHCT541AFT
BUFF
RGT B8
IC614(3/8)
ENB A9 TC74VHCT541AFT
BUFF
PCG B9
1
ENB A10
8 12
PCG B10
IC614(7/8)
R629
GND A11 47 TC74VHCT541AFT
IC615(7/8) 19
1/16W BUFF
TC74VHCT541AFT
:CHIP
GND B11
BUFF
CLP A12
B12
PRG
IC615(1/8)
IC614(2/8)
CLP A13 TC74VHCT541AFT TC74VHCT541AFT
BUFF BUFF
PRG B13
A14
VST
B14
VCK
IC615(2/8)
IC614(6/8)
TC74VHCT541AFT
VST A15
TC74VHCT541AFT
BUFF
VCK B15 BUFF
HST A16
B16
FRP
IC615(4/8)
IC614(1/8)
A17
HST TC74VHCT541AFT
TC74VHCT541AFT
BUFF
FRP B17
A18
GND
GND B18
POSCONT2 A19
INVCNT B19
JL652
POSCONT2 A20
#
INVCNT B20 IC624
LM7131B
A21
POSCONT1
SID AMP
B21
SID
POSCONT1 A22
B22
SID
IC615(6/8)
A 5V
GND A23
TC74VHCT541AFT
GND B23
A5V A24
A5V B24
A5V A25
A5V B25
A26
GND
JL612
GND B26
#
EVENB A27 EVEN B
EVENG
B27 EVEN G
EVENB A28
JL627
#
EVENG B28
GND A29
JL628
GND B29
#
EVENR
A30 EVEN R
(P1)
B30 ODD B
ODDB
JL629
EVENR A31
#
B31
ODDB
GND A32
JL630
GND B32
#
ODD G
ODDG A33
ODDR B33 ODD R
JL631
ODDG A34
#
ODDR B34
GND A35
GND B35
VPL-PX20/PX30
A B
D5V-2
FL604 IC625
# MC100ELT20
C757
PECL DRV FB641 0.1
EMI
BKM1608TS601 16V
R485
B:CHIP
0 FB639
NC VCC
SHORT BLM11B750S
JL641
Q D #
11
Q NC
R486 FB640
10 20
0 BLM11B750S NC GND
SHORT C719
C755 C756
R487 9 0.1
0.1 # JL643
EMI 16V
330 R488 16V
#
1/16W B:CHIP
330 B:CHIP
FL603 :CHIP
1/16W
# :CHIP
IC615(8/8)
TC74VHCT541AFT
BUFF
D+5V
(P2)
SCL0
#
PANEL CONT (P1)
R479
LCD DRIVE
47 1/16W :CHIP
16 HCK2
5.0 0
15 3 4
DWN
IC626(2/6)
20
TC74VHC14FT (P1)
R651
# INV
9 11
BLKI
C711
IC626(1/6)
0.1
10 TC74VHC14FT
16V
INV
B:CHIP
5.0 0
6 14 1 2 RGT
R472
47
RB DIR (P2)
1/16W
4 16 :CHIP PCG
R476
1 47
1/16W
8 12 :CHIP ENB
19
ENB1
R477
2 18 47 1/16W :CHIP
CLP (P1)
R471 JL634
3 17 47 1/16W :CHIP PRG
#
HCK1
3 17
R478
6 14 47 1/16W :CHIP VST
R474
VCK
7 13 47 1/16W :CHIP
R475
IC614(5/8)
47 1/16W :CHIP
TC74VHCT541AFT
BUFF
R480
5 15 47 1/16W :CHIP HST
JL635
# FRP
2 18
R470
47 1/16W :CHIP
BUFF
POS-CON1
POS-CON2
SID-OUT
R1638
A 5V
0
SHORT
C754
0.1
C759
5p 16V
B:CHIP
:CH
R482
270
1/16W
INV-CNT
7 13 :CHIP
R484
R483
470
47
1/16W 1/16W
BUFF :CHIP
:CHIP
C D
C (3/3) C (3/3)
17V
L611
47µH
EMI
FL600
#
IC608
15.5V L612
PQ20VZ5U 47µH
15V REG
1.2 4.8 EMI
JL644
#
JL618 ADJ ON/OFF FL601
# O I #
G C662
C654 R708
R703 100
100 R705 10k
8.2k 25V
25V
:RN-CP 20k 1/16W :AL-CP
:AL-CP :CHIP
:RN-CP
R704 R709
510
4.7k
:RN-CP
1/16W
:CHIP
IC605
A 5V PQ05SZ1U
A5V REG
JL642
#
O I
G
C648 C652
100
100
16V
16V
:AL-CP
:AL-CP
IC606
D5V-2
PQ05SZ1U
D5V REG
JL640 JL609
# #
O I
G
C649 C653
100
100
16V
16V
:AL-CP :AL-CP
A 5V D5V-2
R1629
(P2) #
R1630
#
D5V-2
6 8
7 14
C769
0.1
IC626(3/6)
5 9 16V
TC74VHC14FT B:CHIP
INV
IC626(4/6)
TC74VHC14FT
INV
C(3/3)
(LCD DRIVER)
B-SS1696<08.>-C..-P3
9-31 9-31
E
CN600
8P
:SMD
TO GA CN2104
1 6V
2 6V
JL604
GND
# 3
JL607 4 GND
#
17V
5
6 17V
JL608
7 GND
#
8 GND
CXA2112R (IC603, 604, 609, 610, 611, 612)
48 47 46
INVERT
AMP
DLY CNT 49
MCLK
50
MCLK/ 51
INV CNT 52 D
VDD 53
CLOCK
CLK OUT 54 DELAY
CLK OUT/
55
D.P 56
D.P 57
DGND 58
S/H
PULSES
CLK IN 59
TIMING
GENERATOR
NC 60
CLK IN/ 61
PRG OFFSET CANCEL
62
MODE TIMMING
NC
63
NC 64
1 2 3 4 5 6 7 8 9 10 11 12 13
M62399FP (IC602)
CS0 CS1 CS2 VDD AO4 AO3
20 19 18 17 15
R2
CHIP SELECT
R1
8 BIT PRECEDENCE 8 BIT PRECEDENCE
SEGMENT R-2R SEGMENT
8 BIT LATCH 8 BIT LATCH
8 BIT LATCH 8 BIT LATCH
8 BIT PRECEDENCE 8 BIT PRECEDENCE
SEGMENT R-2R SEGMENT
R1
R2
1 2 3 8 4
R SCL SDA Vref L AO5 AO6
F G
1
MC100ELT20 (IC625)
1 8 VCC
NC
TTL
Q 2 7 DO
PECL
Q 3 6 NC
NC 4 5 GND
2
45 44 43 42 41 40 39 38 37 36 35 34 33
SID BIAS VCOM 32 GND2
S/H S/H S/H
BUFFER 31 SH OUT1
OFFSET CANCEL 30 NC
S/H S/H S/H BUFFER SH OUT2
29
28 NC
OFFSET CANCEL
S/H S/H S/H BUFFER 27 SH OUT3
3
26 PV CC
OFFSET CANCEL
D.P
25
24 D.P
23 PGND
NC
22
S/H S/H S/H BUFFER 21 SH OUT4
NC
OFFSET CANCEL 20
S/H S/H S/H SH OUT5
BUFFER 19
NC
OFFSET CANCEL 18
S/H S/H S/H BUFFER SH OUT6
17
OFFSET CANCEL
14 15 16
4
AO2 AO1 VDD Vref U2
14 13 12 16 11
R2 R2 R2
R1 R1 R1
8 BIT PRECEDENCE 8 BIT PRECEDENCE
R-2R SEGMENT R-2R SEGMENT R-2R
8 BIT LATCH 8 BIT LATCH
8 BIT LATCH 8 BIT LATCH
5
8 BIT PRECEDENCE 8 BIT PRECEDENCE
R-2R SEGMENT R-2R SEGMENT R-2R
R1 R1 R1
R2 R2 R2
5 6 7 10 9
AO7 AO8 GND Vref U1
H