10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110
•
4-10
MAINTENANCE
Re-assembly
After trouble-shooting and repair, re-assemble all parts in
reverse order from above. Do not tighten the screws until
all have been installed, to ensure that all parts are centered
properly. Check that all three cable connectors are secured.
Following are possible symptoms, diagnosis, and repair
suggestions for use in trouble-shooting (the most likely
causes are listed first).
Symptom
Faulty Component
Repair
No display
Battery needs charge
Battery connection
R801
Display
U101
U111
Loose cable connector
U201
Y201
Charge battery.
Check all five cells.
Adjust, replace if bad.
Replace display.
Check for +5 V at Pin 2. If
not, replace U101.
Check for +5 V at Pin 2. If
not replace U111.
Tighten connector.
Check J801-5 for activity,
if none replace U201.
If no 2.45 MHz signal at
TP201, replace Y201.
Battery
won’t
charge
U120
Q121
D121, D122, or D123
T121
R122
B101-B105
Replace U120.
Replace Q121.
Replace D121, D122, D125
Replace T121.
Replace R122.
Replace B101-B105.
Ranges 1-3
faulty
Q701
R704
Replace Q701.
Replace R704.
Ranges 4-5
faulty
Q701
Replace Q701.
Faulty
readings
U700
J701
Q702 or Q703
U702
Replace U700.
Check connection at
binding posts.
Replace Q702 or Q703.
Check TP701, replace U702
if no voltage present.
Table 3: Fault Symptoms and Repair Actions
