Measurements And Adjustments - Panasonic SJ-HD515 Service Manual

I/O
Pin Terminal
No. Name
77 SBP / -
Spindle management retry test
RETRY signal output (Not used, open)
78 SRV / -
Servo retry test signal output
RETRY
(Not used, open)
79 ARDSKIP -
Address skip test signal output
(Not used, open)
80 SPMWE -
SPM test signal output
(Not used, open)
17.5. IC72 (M51V4400D7FS): / 4M DRAM
I/O
Pin Terminal
No. Name
1 DO1 I/O DRAM data 1 input/output
2 DO2 I/O DRAM data 2 input/output
3 WE I DRAM write enable input
4 RAS I DRAM row address strobe input
5 A9 I DRAM address 9 input
9 A0 I DRAM address 0 input
10 A1
| I DRAM address 1 - 3 input
|
A3
12
13 I Power supply terminal
V
CC
14 A4
| I DRAM address 4 - 8 input
|
A8
18
22 OE -
DRAM output enable input
(Not used, connected to GND)
23 CAS I DRAM column address strobe
input
24 DO3 I/O DRAM data 3 input/output
25 DO4 I/O DRAM data 4 input/output
26 - GND terminal
V
SS

18. Measurements and Adjustments

Note:
Because this unit uses the optical magnetic recording, the unit
outputs over 10 times more laser than a CD player does. In
adjustment mode, the laser is always being output. Therefore, be
Function
Function
33