Sony MZ-R50 Analog PCLink, Service Manual

Page: 44 / 56

– – 62 –
IC804 DS1302Z
IC806 MB3800PNF
IC506 MPC18A20VM
r
IC BLOCK DIAGRAMS – MAIN (2/3) SECTION –
21 22
23 24
25 26 27 28 29 30
16 17 18 19 20
2 3 5 4 6 7
8
9
10 1
11
12
13 14 15
CONTROL
LOGIC
CHARGE PUMP
SAW
SAW
CLK
OSC
EFM
LOGIC
BIAS
VREF
PRE
DRIVER
VREF
COMP
COMP
+
PRE DRIVER
SAW
EN ENB
OP
RF SS DTC NC PGNDLG VB VIN VIH VGH CIL VCC CK COSC MODE 1 MODE 2
INM
ERRID ERRIV
GND
VSET
VG
VGL
PGNDG
PGNDB
HA HB
PGNDA
GND
EFM
VERF
2
3
4
1
7
6
5
8
OSCILATOR
AND DIVIDER
VCC2
X1
X2
GND
REAL TIME
CLOCK
COMMAND AND
CONTROL LOGIC
INPUT CHIFT
REGISTERS
VCC1
SCLK
I/O
RST
DATA BUS
ADDRESS BUS
RAM
±
±
+
_
1
2
3
4
8
7
6
5
REFERENCE
VOLTAGE
SOFT START
S.C.P.
ERROR
AMP
SAW-WAVE
GENERATOR
OUTPUT
DRIVE
CONTROL
CIRCUIT
1.25V
0.5V
500
36K
0.1V
DTC 0.6V
0.3V
30K
FB
OSC
GND
OUT
-IN
SCP
VCC
BR/CTL