The top of the 1000 microF capacitor adjacent to the XPA connector at the upper right of the picture is bulged. White residue from the electrolyte is on the plastic housing at the lower left.
1---2 2---1 3---5 4---4 5---32 6---8 7---7 8---6
DE-9M mini-DIN-8M 1----------5 2 3----------8 4 5 6 7 8 9----------7 shell----shell
DE-9M Resistance pin ohms 1 4 k 2 4 k 3 infinite 4 infinite 5 0 6 4 k 7 infinite 8 4 k 9 4 k
PS/2 Connector Wire color Mouse internal J1 1 +DATA black J1,3 2 Not connected white J1,4 3 GND blue J1,6 4 Vcc yellow J1,1 5 +CLK red J1,2 6 Not connected orange J1,5 Shell shield J1,7
Connectors discussed in http://en.wikipedia.org/wiki/D-subminiature
DE-9F DB-25M DCD 1---8 DCD RxD 2---3 RxD TxD 3---2 TxD DTR 4---20 DTR G 5---7 G Signal ground DSR 6---6 DSR RTS 7---4 RTS CTS 8---5 CTS RI 9---22 Ring indicator, not connected in NetVista computer.
Connectors discussed in http://en.wikipedia.org/wiki/D-subminiature
Topology discussed in http://en.wikipedia.org/wiki/Null_modem
Buffers and baud rates discussed in article on
UART.
DE-9F DE-9F DCD 1<--4 DTR RxD 2<--3 TxD TxD 3-->2 RxD DTR 4-->6 DSR, 1 DCD G 5---5 G Common ground DSR 6<--4 DTR RTS 7-->8 CTS CTS 8<--7 RTS RI 9---9 Ring indicator, not connected in NetVista computer.
Connections for DCD and for RI, pins 1 and 9, can be absent in commercial null modem cables.
Data HRS Flow DE-9M RS-232 1 NC 2 NC 3 NC 4 NC 5 NC 6----YEL----5 Signal ground 7----VLT----5 Signal ground 8<---RED----2 RxD 9<---ORG----8 CTS 10<---GRY----6 DSR 11<---GRN----9 Ring indicator 12<---BLK----1 DCD 13----WHT--->4 DTR 14----BLU--->7 RTS 15----BRN--->3 TxD 16 NC
DB-25F DB-25M PG 1 GRY 1 PG Protective ground TxD 2 BLK--> 3 RxD RxD 3 BRN<-- 2 TxD RTS 4 RED--> 5 CTS CTS 5 BLU<-- 4 RTS DSR 6 ORG<-- 20 DTR G 7 GRN--- 7 G Common ground DCD 8 ORG<-- 20 DTR DTR 20 YEL--> 6 DSR DTR 20 YEL--> 8 DCD
http://www.bransonic.com/literature.asp
This problem has decommissioned at least two machines here.
An IBM NetVista Type 6578 desktop computers built in 2000 or 2001. One running as a workstation and began to reboot spontaneously. The second would not pass the POST. In each machine 13 capacitors were replaced; 4 of 1500 microF and 9 of 1200 microF. Subsequently the first machine has been operating with no problem. The second stops booting and displays "186 Security hardware control logic error." According to an IBM Web page, the solution is to replace the system board.
The second machine afflicted with capacitor plague is an HP C9880A scanner. The PCB was washed with distilled water and then with ethanol. With a new capacitor the machine still does not power up.
In RS-232 terminology, the computer is the data terminal and
the camera is the data set.
If pins 4 and 6 in the DE-9F connector are jumpered together,
only four conductors, including the ground, are required. The topology
below accomplishes the same with 5 conductors. The computer end
has a DE-9F connector typical of a serial cable. The camera end has
a Hirose HR10A-10P-10P(73), Digikey part number HR1633-ND.
VIewing the pins from the back of the connector where they are
soldered, they are numbered 1 through 8 clockwise around a circle
beginning at 1:00 o'clock. Pins 9 and 10 are in the center, 9 to the
right and 10 to the left.
JVC appears to have invented their own synonyms for the RS-232
signals in parentheses on the right. RS-SDO is the JVC name
for TxD for example.
DE-9F HRS connector connector -------------------------------------- 1, 7, 8, 9 no connection 1, 2, 3, 4, 5, 9 RxD 2 <-- red 7 RS-SDO (TxD) TxD 3 --> green 6 RS-SDI (RxD) DTR 4 --> white 10 Operation (DSR) G 5 ---- bare, shield 8 GND DSR 6 <-- black 10 Operation (DSR)
This has a Hirose HR10A-12P-10P(73) on one end and a HR10A-12J-10S(73)
on the other end. Pin numbering on the 12P connector is similar to that
on the 10P.
9 1
8 10 2
7 12 11 3
6 HRS 4
5
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V0003 011005 PCB Made in Taiwan. Assembled in China. Cf. Unique UN-1061 Floppy/IDE/Game/Serial/Parallel expansion card. Configuration is by 7 columns of 3 pins. Each triple of pins can have one jumper across the upper and center pins or across the center and lower pins or across no pins. This is what I've found with the ohmeter and with use in a PC.
Pin 1 connects to IRQ line 7. Pin 3 connects to IRQ line 5. For use by the parallel port?
Printer port base addresses reported by BIOS. Pins 4 & 5 closed <=> parallel port base address = 378. Pins 5 & 6 closed <=> parallel port base address = 278.
Pins 7 and 10 connect to IRQ line 3. Pins 9 and 12 connect to IRQ line 4. The corresonding jumpers must connect these IRQ lines to the serial port circuitry. Obviously both serial ports should not use the same IRQ; ie. one jumper should be up, the other down.
Pins 13 & 14 closed <=> serial port? Pins 14 & 15 closed <=> serial port 2 disabled.
Pins 16 & 17 closed <=> serial port 1 base address 3F8. Pins 17 & 18 closed <=> serial port 1 base address 3E8.
Pins 19 & 20 closed <=> serial port 2 base address 2F8. Pins 20 & 21 closed <=> serial port 2 base address 2E8.
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