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SM-Z-89-37
Zenith Data Systems SM-Z-89-37 Manuals
Manuals and User Guides for Zenith Data Systems SM-Z-89-37. We have
1
Zenith Data Systems SM-Z-89-37 manual available for free PDF download: Service Manual
Zenith Data Systems SM-Z-89-37 Service Manual (53 pages)
Double-Density Disk Controller
Brand:
Zenith Data Systems
| Category:
Controller
| Size: 2 MB
Table of Contents
Table of Contents
2
Specifications
5
Reconfiguration
7
To Rearrange the Drive Numbers
9
Programming Modules
13
Circuit Description
15
Control Lines (P2)
16
Ul Data Buffer and U7B Buffer Direction Control
16
U2, U3, U4 Interrupt Control
16
U6 Control Decoder and Inverter
17
U7A Address Control Latch
17
U8A Reset Pulse Latch
17
U8B Head Load Delay
17
U9 and Ul0 Disk Controller Clock
17
Ull Interface Control Latch
17
U13 Input Signal Multiplexer
17
U14 Raw Read Latch
18
U15 Drive Buffer
18
U16, U17, U18, Ql, and Q2 Phase Lock Loop Tracking and Precompensation
18
U19, U20, U21, and U22 Disk Drive Interface
18
U23 Voltage Regulator
18
Diagnostic Routine
19
To Rearrange the Drive Numbers
20
Starting the Diagnostic Programs
24
Disk Controller Checkout
26
Disk Controller Checkout Error Messaees
28
General Drive/Controller Diagnostic
29
Initiating the General Drive/Controller Diagnostic
29
Available Tests and Options
30
D-General Drive Checkout
30
M-Media Check
33
S-Seek Time
33
A-Align
34
E-Exit
35
Service
37
Recalibration
37
VCO Bias Adjustment
38
VCO Center Frequency Adjustment (with Frequency Counter)
40
VCO Center Frequency Adjustment
40
(With Oscilloscope)
40
Precomposition Adjustment
40
In Case of Difficulty
41
Decimal to Octal to Hex to ASCII Conversion , , 5·6
42
Replacement Parts List
43
Semiconductor Identification Chart
45
Circuit Board X-Ray View
51
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