Symmetricom 5071A Assembly And Service Manual

2. Service
Top-Level Diagnostic Tree (Diagnostic Section 1)
60
I/O Diagnostic Tree
(Subsection 5)
This subsection describes the Input/Output (I/O) diagnostic tree.
1.5.1 Input/Output Faults
1 Use the following list to find a fault-isolation procedure associated with the
observed I/O problem. (Assembly/Module diagnostic trees
are located in diagnostic tree section 3.)
QUESTION: Which I/O was found at fault?
If 5/10 MHz: Go to, 3.5.1.0 (A10 diagnostic tree).
If 1 MHz: Go to, 3.5.1.0 (A10 diagnostic tree).
If 100 kHz: Go to, 3.5.1.0 (A10 diagnostic tree)
If 1 PPS: Go to, 3.3.0 (A8 diagnostic tree).
If 1 PPS Sync: Go to, 3.3.0 (A8 diagnostic tree).
If RS-232: Confirm fault, (check datacomm config., internal cables)
remove power, replace A3, and retest.
If Status Output: Confirm fault, (check internal cables), replace A7, and
retest.

Symmetricom 5071A Specifications

General

Brand	Symmetricom
Model	5071A
Category	Measuring Instruments
Language	English