Philips HTS3375/55, Service Manual

Page: 19 / 35

6 - 1 6 - 1
MAIN BOARD
TABLE OF CONTENTS
Internal IC Diagram ........................................................................... 6-1
Circuit Diagram(part one) .................................................................. 6-2
Circuit Diagram(part two) ................................................................... 6-3
Circuit Diagram(part three) ................................................................ 6-4
PCB Layout Top View ....................................................................... 6-5
PCB Layout Bottom View .................................................................. 6-6
INTERNAL IC DIAGRAM - TAS5508B
INTERNAL IC DIAGRAM - HY57V641620F
State Machine
CLK
CKE
U/LDQM
WE
CAS
RAS
CS
Row Active
Refresh
Column Active
Self refresh
logic & timer Internal Row
Counter
Row
Pre
Decoder
1Mx16 BANK 3
1Mx16 BANK 2
1Mx16 BANK 1
1Mx16 BANK 0
X-Decod
er
X-Decod
er
X-Decod
er
X-Decod
er
Memory
Cell
Array
Y-Decoder
Sen
se
AM
P
&
I/
O G
at
e
I/
O
Buf
fe
r &
Log
ic
DQ0
DQ15
Column
Pre
Decoder
Bank Select
Column Add
Counter
A0
A1
A11
BA1
BA0
Address Buf
fers
Address
Register
Mode Register
Burst
Counter
CAS Latency
Data Out Control
Pipe Line
Control