Sony MZ-R55 Service Manual page 75

IC602 MPC18A20VMEL
30 29 28
OP
1 3
2
IC701 BA6966FV
1
U OUT
RF
2
U IN 3
TIMING
V IN 4
SELECTER
W IN 5
6
COM
OPERATION
CST
7
CONTROL
LOGIC
PHASE
CONTROL
8
CSL 1
SCOPE
CSL 2 WAVEFORM
9
MIX
GND 10
IC806 XC6383B331MR
2 STEP PFM CONTROL
OSC 100/180kHz
BUFFER
2
1
1
VSS EXT
27 26 25
24 23
PRE DRIVER
COMP
+
SAW
COMP
VREF
PRE
DRIVER
5 6 8
4 7
DRIVE HIGH/
PRE
SIGNAL LOW
DRIVE
MIX SEPARATOR
LOGIC
EX-OR
TSD
VREF
3
VOUT
– 49 –
22 21
20 19
CLK
SAW
CHARGE PUMP
OSC
EFM
LOGIC
9 10 11 12
20 V OUT
19
W OUT
18 NC
17 VM
16 VCC
15 RIB
STANDBY 14
STBY
13 BRK+
12 BRK–
11 FG
IC804 PST9325UL
VCC/
NC 1
VOLTAGE 4 VCC
DET
RESET
GND
2 SIGNAL
3 VOUT
OUTPUT
18 17 16
CONTROL
LOGIC
EN ENB
SAW
BIAS
VREF
14 15
13