User Manuals: Radio Shack 26-1061 Desktop Computer

Manuals and User Guides for Radio Shack 26-1061 Desktop Computer. We have 3 Radio Shack 26-1061 Desktop Computer manuals available for free PDF download: Service Manual

Radio Shack 26-1061 Service Manual (134 pages)

Brand: Radio Shack | Category: Computer Hardware | Size: 7 MB

Table of Contents
3
Introduction
9
System Overview
11
Disassembly/Reassembly
13
Disassembly
15
Reassembly
17
Cpu Circuit Board
17
Technical Description
21
Video Sync Circuits
21
Processor
21
Ram
21
Address Decoding
22
Memory Map
22
10 Port Description
23
Video
24
Keyboard
25
Cassette Interface
25
Line Printer and Real Time Clock
26
10 Bus
26
Adjustments and Jumper Positions
26
Model 111 10 Bus Detailed Description
27
Model 111 PO RT Bits
29
CPU Module Parts List
33
Floppy Disk Interface
49
Technical Description
51
Control and Data Buffering
51
Non-Maskable Interrupt Logic
51
Drive Select Latch and Motor on Logic
51
Wait State Generation and WAITIMOUT Logic
52
Clock Generation Logic
52
Disk Bus Selector Logic
52
Read/Write Data Pulse Shaping Logic
52
Disk Bus Output Drives
52
Write Precompensation and Clock Recovery Logic
52
Floppy Disk Controller Chip
53
Adjustments and Jumper Options
53
Floppy Disk Interface PC Board Parts List
57
Vrs-232C Circuit Board
61
RS-232C Technical Description
63
Brg Programming Table
63
Pin-Out Description
64
Port and Bit Assignments
65
RS-232C PC Board Parts List
70
Power Supply
75
Functional Specifications
75
Troubleshooting
75
Set-Up Procedures
75
Visual Inspection
75
Section VI - Power Supply
75
Start-Up
76
No Output
76
Load Board Values
76
Performance Test
77
Voltage and Ripple Specifications
77
Power Supply Component Values
78
Video Monitor
81
Functional Specifications
83
Service Adjustments
85
Illustrated Parts Catalog
87
Illustrated Parts Catalog Parts List
94
Mini-Disk Drive
99
General Description
101
Introduction
101
Important Notice
101
Physical Description
101
Functional Description
101
Interface Connections
101
Physical Checkout
102
Mounting the Disk Drive
104
Resistor Termination
104
Flat Ribbon Cable Assembly
104
Theory of Operation
105
Introduction
105
Organization of the Disk Drive
105
Functional Block Diagram Description
105
Index Pulse
105
Write Protect
105
Track <.30 Switch
105
Spindle Drive
105
Positioner Control
105
Data Electronics
106
Data Recording
107
Data Reproduction
107
Operation
109
Interface Electronics Specifications
109
Input Control Lines
109
Select Lines (Ds1* - Ds4*)
109
Drive Motor Enable (MOTORON)
109
Direction and Step (DIR*) (STEP*)
109
Compensated Write Data (CWD)
109
Write Enable (WG*)
109
Track 00 (Trk0*)
110
Interface Connector Pin Assignments
110
Power Connector Pin Assignments
110
Side Select (Sdsel)
111
Output Status
111
Index Pulse (Ip*)
111
Write Protect (WPRT*)
111
Read Data (RD*)
111
Maintenance
113
Physical Description of the PC Boards
113
Circuit Board Test Points
113
Option Select
113
Input Line Terminations
113
Preventive Maintenance
116
Cleaning the Head
116
Alignment A~D Adjustment
116
Drive Motor Maintenance
116
Carriage Movement Check
116
Head Radial Alignment/Ce Alignment
117
Track <.30 Alignment
118
Index Sector Adjustment
118
Head Amplitude/Compliance Check
119

Radio Shack 26-1061 Service Manual (132 pages)

Brand: Radio Shack | Category: Desktop | Size: 6 MB

Radio Shack 26-1061 Service Manual (132 pages)

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Brand: Radio Shack | Category: Desktop | Size: 30 MB

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User Manuals: Radio Shack 26-1061 Desktop Computer

Radio Shack 26-1061 Service Manual (134 pages)

Table of Contents

Radio Shack 26-1061 Service Manual (132 pages)

Radio Shack 26-1061 Service Manual (132 pages)

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