SC1041_SAIL_PDP-6_hardware_log_1967-09

1220 10-6-67

LPT Bug:

IT SEEMS THAT IF YOU TRY TO LIST WITH THE PRINTER AND IT WAS IN AN OFFLINE CONDITION BEFORE YOU LIST AND STILL IS WHEN YOU LIST; YOU CAN'NT GET IT TO PRINT BY JUST HITTING START. SO SAY THE LOSERS THEY CLAIM THAT IF YOU HIT START --> STOR --> MAN PRINT MANY TIMES IN THAT ORDER MABEY IT WILL SUDDENLY START TO PRINT.

HOWEVER I, WITH 2R + PIP2 CAN SAY "C'Z WITH SEVERAL LINES FULL AND PRINTER OFFLINE AND BY HITTING START -- IT WILL?

LETS WAIT AN SEE WHAT DEVELOPES

RANDY

2015 6 OCT 67

[Librascope?] Disk shut itself off due to 90° water.

Rotating element was off sector address error was on. Cabinet warning and stator over[teup?] came on. Shut electronics off.

SRR

31

0045 7 Oct 67 Contemplated memory problems. Ran logic margins on core 3 Rack D got -3V. But that showed was not missing RDRS. Tried running DP. Got a few core 3 missing RD RS. Got much oring of DP core 0 & core 2. In the hope of curing this tried checking and resoldering the connectors on [MB or M8?] line [1' or 2' ?] for P0 & P2 in core 2 Found 2 cold soldered joints and 1 likely short between 2 lines. Fixed all. Tried again. No success. Core 0 & core 2 oring still there. [signed]SRR.[/signed]

0830 7-OCT-67

Found core 0 in maint, rest in Run. left it that way and ran Disk Diag. One recoverable read error in test 6 (lonely hole). No other errors. Ran diagnostic over. Picked up bit 3 in fourth word of buffer (core box 0). This box is still in maint. Got off at 10:00

J. Sauter

7-Oct-67 2011:50.52

Green Monster had indigestion again. I removed cover and looked at it (thusly, it was cured.)

B.P.

7-Oct-67 24:00

ReV S switch on pre[o?]mp does not work.

W[?]W

7-OCT-67 2225

Placed disk on line. Started running diagnostic. 2330. disk got "sector address error" while no operation was being performed on it. Chiller was OK. Pushed Clear button on disk. Error light went away. Trouble with parity error in IOP. DWP diagnosed trouple with parity logic. Adjusted relavent B360. No further errors. Put disk in selftest about 0200 8-OCT-67

John Sauter

[13?]00 8 Oct 67

Was called at 1000 - machine didn't work.

Arrived at 1130. Got random errors from memory diagnostics TS MAIN correctly reported that FSC doesn't work the way it used to.

Finally got checkerboard to run in one 0 with de -[?] memories failed randomly. Failures correlated well with wiggling MB cable #1 from party box to core 0.

Found connector for MB cable # 1 in core 0 broken and marginal. Pulled 1664's in Core 0

Fixed most of the marginal connections in CORE ϕ cable #1. The connector is still falling apart but it will only fall apart if pushed and pulled.

SRR

1405 8 Oct 67

Timesharing back up.

Running BLTST UINS4 & UINS5.

SRR

1430 8 Oct 67

All tests give stopped above tests - no errors.

SRR

1550 8 Oct 67

Tried DP. Still hangs CP in core 3 without RD RS sometimes and also has the [J?]MS word clobbering tendencies.

SRR