C1-4 12,000uF, 6.3v, 105c CR2 SCSI LED D1 Motorola R7 20 B2515L FC1,2 5MP 800mA 250v J1 Keyboard J2 I/O Power connector J3,27 Power J3P Unused power connector, 24 pin J4 ? J5 Mouse J6 Tablet J7A Rear Fan J8 Parallel Port J10-13 32-bit Slots J14 External SCSI-2 mini-C68 J15 Ethernet J16 Serial Port Extender Cable J20 Floppy J21 Battery, Panasonic 3v BR-E5 Lithium J22 Key Mode Switch / Reset Button J23 LED display J24 Internal SCSI "P" connector J25 Power Control J30-33 Memory Card Slots H, D, B, F J34 Unused 16 pin header U1 07L7258-SER Network address U2 93H7791 U3 07L7256 CPUID=94 U9 65G7530 U11 DP8570AV Timer Control Peripheral U13,14 Hitatchi HM514280AJ7

U21 88H2265 Power2 Super Chip U27 50G6947 U29 Nat'l Semi DP8473AV Floppy controller U31 Toshiba 81F8125 TC140G44AF U34 73H2565 Turbo U38 51G9835 U40 PTC resistor, internal SCSI bus U41 26H6184 U47,48 Hitatchi HM628128BLFP-7 U52 Motorola MC12429 U53,100 82G2645 SE SCSI controller U54 AMD AM186 EM-40VC  U59 88G1094 SCSI Bios Even ??? U62 61G2323  MCA Bus interface U64 88G1095 SCSI Bios odd  ??? U71 81F8150 U75 intel KU82596DX25 U85 PTC resistor, external SCSI bus U96 N82C55A2 U97  80C51BH U103 Nat'l Semi PC16553DV X1 24.0000 MHz osc X2/3 16.000 MHz osc X4 32.768 kHz X5 40.0000 MHz osc X6 14.3181 MHz osc X7/8 3.906250 MHz osc X11/12 40.1500 MHz osc X13 16.000 MHz osc X14 9.21600 MHz osc 1

J22 Keylock Pinout

 

 The red wire only connects the end pins.
 Reset switch leads Yellow and Black. (C&K 8168)
 Keylock switch leads Orange, White, Blue. (C&K N Series)

Maint   Orange - White
Secure  Blue - White
Normal  All open
 

Remove Card Guide Frame
   There's a hard and an easy way. To save time, the easy way is to remove both fans by unscrewing the four gold colored screws on the top of the card guide and sliding the fans (still in their metal mounts) up and out of the card guide.
   Now all three mounting screws are visible AND accesible. Remove all three screws and lift the card guide out.

Install Card Guide Frame
   One way is to just start the three gold mounting screws into the case. Place the frame just to the rear of the screws and slide it forward until the frame is seated against all three screw. Now tighten them down. Reinstall the fans.

Remove and Install P2SC Heatsink
   The best way to do this is with the planar out of the case, otherwise the front outer nut is hard to start by hand. NOTE: Align the heatsink fins so that they are parallel to the air flow. In other words, so the air can blow in between the fins.

Remove Planar
   Remove front card guide frame. Unplug rear fan, remove memory card rear guide, pull fan off rubber mounts. Unplug all planar power and signal connectors. Remove the parallel port and external SCSI port posts. Remove all planar mounting screws.
   Pull planar towards front of case untill the ports clear their case cutouts at the rear. Pivot rear of board up and forward until you can remove it.

Memory
  The S.6 memory card illustration is HERE 
   The memory modules for Model 397 must be installed either in pairs (2 cards) or quads (4
cards). Each card in a pair or quad must be of equal capacity. If only a pair of memory modules is installed, use slots D and H. If a quad is installed, use slots B and F, in addition to slots D and H.