Read Sony SRF-M55 Service Manual online
– 6 –
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF IC TERMINALS
IC301
µ
PD17015GS-556-GJG (SYSTEM CONTROL, LCD DRIVE)
Pin No.
Pin name
I/O
Description
1
POB2
I
Key return input.
2
PCO0
O
Key source output.
3
PCO1
O
Key source output.
4
PCO2
I
Power (AUTO OFF) key input.
5
PCO3
I
HOLD key input.
6
POD0/BEEP
O
Beep output.
7
POA0
I
Key return input (Fixed at “L”).
8
POA1
I
Voltage decrease information input. E : On-and-off
9
POA2
O
Power ON/OFF output. “H” : ON
10
POA3
O
Mute signal output. “H” : Mute ON
11
CE
I
Voltage decrease information input. E : Lighting
12
XOUT
O
System clock output (75 kHz).
13
XIN
I
System clock input (75 kHz).
14
VDD
—
Power supply.
15
GND
—
Ground.
16
EO
O
PLL error output.
17
VREG
O
Voltage regulator output.
18
VCOH
I
FM VCO input.
19
VCOL
—
Not used (OPEN).
20 – 28
LCD 0 – 8
O
LCD segment output.
29 – 32
COM 0 – 3
O
LCD common output.
33
VLCD1
—
Power supply for LCD drive.
34
CAP1
—
Connecting pins of the capacitor for LCD drive voltage.
35
CAP0
36
VLCD0
—
Power supply for LCD drive.
37
POB0
I
Key return input.
38
POB1
Click on the first or last page to see other SRF-M55 service manuals if exist.