Akai DV-R4000SS Service Manual page 34

U3, U4 W981616BH/K4S161622D
Data Input Register
Bank Select
512K x 16
512K x 16
CLK
ADD
Column Decoder
Latency & Burst Length
LCKE
Programming Register
LRAS LCBR LWE
LCAS
Timing Register
CLK CKE CS RAS CAS WE
IC502, IC506 BA4558N/LS4558N
+ +
1CH
2CH
- -
1 2 3 4 5 6
7 8
+IN1 V +IN2 -IN2 OUT2 VCC
OUT1 -IN1
EE
U15 BA5983FM
28 27 26 25 24 23 22
+ - + -
10k
20k
10k
10k
10k
10k
+ - + -
1 2 3 4 5 6 7
IC601, IC602, IC603 TA8216H/
TA8258H
LWE
LDQM
2
IN2
DQI
1
400ohm
3
PRE-GND
400ohm
5
LDQM
LWCBR 4
IN1
L(U)DQM
IC801 LM78L05ACZ
INPUT
1
CURRENT
GENERATOR
PROTECTION
STARTING REFERENCE ERROR
CIRCUIT VOLTAGE AMPLIFIER
THERMAL
PROTECTION
21 20 19 18 17
10k
10k 10k
- + -
+
STAND BY
20k
CH 4 10k
level
shift
level
shift
STAND BY
10k
CH1/2/3
10k
- + +
-
10k 10k
10k
8 9 10 11 12
63
IC401 TA2099N
FM IF
IN
8 11
24
+
OUT2
AMP2 12
1
20kohm
PW-GND 10
20kohm
1
AMP1 7
OUT1
+
AM
MIX
VCC
RIP-FIL
6
9
1
AM FM BW
RFIN
SERIES OUTPUT
2
PASS
ELEMENT
IC402 TC9257F
SOA
FM
AMP
14
FM
13
GND
3
16
15
10k
- + + -
10k
level
shift
level
shift
10k
- + + -
10k
13 14
AM IF AM FM ST
MIX FM
OUT VSTB IN QUAD OUT OUT DET IN
23 22 21 20 19 18
REF
FM
FM
DET
IF
LEVEL
SW
AM
FM
DET
IF
BUFF
AM
BUFF
AGC IF REQ
OSC
2 3 4 5
6 7
FM VL AM VCC GND
AM AGC
SENS OSC OSC
OUT
PSC
L
HF
H
MODE LF
FM
4 12
REFERENCE COUNTER
15
4
1ms OSC
8
TEST
5
22
24
10
4
4
64
LPF1 LPF2 BLENDER L OUT
17 16 15 14 13
AF
VCO
DIVIDE
DECODE
MUTE
ANTI BIRDIE
ST/MO
FM/AM
IF
ST
SW TUN
8 9 10 11 12
TUN
IF ST R OUT
OUT/REQ LED
LED
OT4
5
AMP
AMP
GATE