IBM System/360 2050 User Manual

Delay Line Clock • 83
Switch and Indicator Check 112
Delay Line Driver • 84 EM ULA TOR SERVICE AIDS
114
Layout of M9/M9A Planes
84 1410/7010 Emulator Delays 114
X Drive CUJTent 84
1410/7010 Disk Conversion
114
Y Drive Current 85
2302 Disk Storage Map 114
Shorted X Drive Line •
85
2302 Track Correspondence
114
Open X Drive Line
85
2314 Disk Storage Map
114
Drive Line Shorted to Ground 86
2314 Track Correspondence
114
Sense Inhibit
87
1410/7010 Diagnose Instruction Addresses
115
Storage Waveforms (Voltage Probe)
88
Start I/O Diagnose Instruction
115
Sense Amplifier Output (M9)
88
7070/7074 Operation Codes
115
M9A Differences
89
LOCAL STORAGE (LS) SERVICE CHECKS 90
POWER SYSTEM SERVICE CHECKS
120
Local Storage Timings
90
Converter-Inverter
120
LS Read Operations
90
SCR Gate Signals • 121
LS Write Operation 90
Types of Failures 123
LS Functional Packaging 90
Converter-Inverter Fuse Replacement
123
Local Storage Word Selection 92
Converter-Inverter Troubleshooting
123
LS Temperature Control Unit Check
92
Voltage Regulator Test Points
123
Local Storage Waveforms 92
Changing Voltage Regulators
123
Optimize LS Drive Currents (Shmoo) 93
Voltage Sequence Problems
124
LS Strobe Driver Identification.
95
Plus 18 Volt Sequence Down
124
ROS 201--Cycle One Sector of Local Storage
95
Overcurrent Problems
125
Array Temperature
95
Voltage Regulator Problems
125
Local Storage Heater •
95
Overvoltage Unit Adjustment
125
Checking Drivers and Terminating Diodes • 95
Low Voltage AC Supplies
126
READ ONLY STORAGE (ROS) SERVICE CHECKS. 95
Power Sequencing Relays
126
Ros Retry Adjustment.
95
Dual or Multi
System Emergency Power Off
126
ROS Waveforms
96
ROS Parity Errors 96
LOCATIONS.
127
ROS FOO-F03--ROSDR Test All Ones 97
Power Distribution Frame Locations
127
ROS F01-F02--ROSDR Test All Zeros 97
Frame and Gate Locations
127
ROS Address 000 97
Relay and Contactor Locations.
127
Extra or Missing Bits
97
Circuit Breaker Locations
127
Sense Latch and Strobe 98
Fuse Locations •
127
ROS Ripple Test 98
Voltage Regulator Locations
127
ROS BIT PLANE REMOVALS AND ADJUSTMF.NTS
100
Overvoltage Assembly Locations
127
ROS Bit Plane Adjustments 100
1/0 Tailgate Locations
127
ROS Bit Plane Removal • 100
1/0 Address Cards .
127
ROS Bit Plane Cleaning
100
ROS Bit Plane Installation 101
Connector Installation
102
APPENDIX A - SYSTEM CHARACTERISTICS
138
STORAGE PROTECT (SP) SERVICE CHECKS 102
Physical Data
138
Reference Voltage and Sense Level Adjustments 102
Frame Specifications .
139
Checking SP Drivers and Terminating Diodes 102
Cabling
139
Inhibit Drivers and Sense Amplifiers 102
Power Requirements
139
SP Sense Windings
102
Terminati.on Diodes
103
X and Y Drivers 103
APPENDIX B - SYSTEM CONTROL PANEL
140
Storage Protect Test Points
103
Controls and Indicators
140
CHANNEL SER VICE CHECKS
103
Section A - Power Display
140
Selector Channel
103
Section B - Storage Test.
142
C Reg Set and IF Service Out Delays
103
Section C - Emergency Off .
142
Channel Reset •
103
Section D
142
A-Clock Check.
107
Section F - Channel Control
142
Cycle Counter Check •
107
Sections G and K - Status Indicators
143
B-Clock Check
107
Selector Channel Roller Analysis
144
Tag Generator and Manual Stop Controls
107
Section H - Blank •
149
Indicator Check
108
Section J - Local Store Chart
149
A..Clock Manual Controls
108 Section L - MC, SDR, IAR Indicators; Data and Address
Operation Control Check
109
Keys
150
DTC Hold Check
109
Section M - Intervention and Maintenance Switches • 150
Singleshot Adjustment
109
Section N - Operator Controls
154
Selector Channel Clock-Stepping Procedure 109
Operating Instructions
155
1052 Adapter/Printer-Keyboard
112 System Initialization
155
Singleshot Adjustment
112 Initial Program Load
155
iv

IBM System/360 2050 Specifications

General

Brand	IBM
Model	System/360 2050
Category	Computer Hardware
Language	English