Maxtor 1925 - Manual (Page 36)

Installation
Quickview 40 20/30/40GB AT 4-11
4.4.2 Ventilation
The Maxtor Quickview 40 20/30/40GB AT hard disk drives operate
without a cooling fan, provided the ambient air temperature does not
exceed 131×F (55×C) at any point along the drive form factor
envelope.
4.5 COMBINATION CONNECTOR (J1)
J1 is a three-in-one combination connector. The drive’s DC power can
be applied to section A. The ATA bus interface (40-pin) uses section C.
The connector is mounted on the back edge of the printed-circuit board
(PCB), as shown in Figure 4-7.
Figure 4-8 J1 DC Power and ATA Bus Combination Connector
4 3 2 1
4-Pin DC Power
(J1 Section A)
40-Pin IDE
(J1 Section C)
J1 IDE (40-Pin)/DC (4-Pin)
Combination Connector
Pin 1
Pin 40
Pin 1
Center
Key Slot