HP 437B Service Manual

HP 4378
Service Sheet BD1
8-24 SERVICE
Set the LINE switch to ON.
Observe the Power Meter’s display. Note all of the error codes
displayed. If the display is inoperative, note the patterns displayed on
the service LEDs on the Digital board while LED | is blinking,
If the Power Meter displays a single error code, locate the error code in
Table 8-5. If the Power Meter displays multiple error codes, locate the
pattern of error codes displayed in Table 8-6. After locating the error
codes, read the troubleshooting suggestions listed.
If using the service LEDs, locate the LED pattern in Table 8-4, "Service
LED Error Codes". Read across to the "Error Code" column. Then
locate the error code and the troubleshooting suggestions in Tables 8-5
or 8-6.
These tables contain the most common causes of the displayed error
messages. Other malfunctions that are not listed may cause the error codes as
well.
Table 8-4. Service LED Error Codes
N
eee eee eet OO
&
w nN
~
oo
°
3
eoooocoooecoorry
mere re COocooooocor,r.r;Kr~un
l
l
0
0
0
0
0
0
0
0
0
0
0
0
- ooocoorrrr OOOO.
Qmr OOreKr OOF PK OOF Oo QO = Oe Or Or Or Or Oo
°
g

HP 437B Specifications

General

Brand	HP
Model	437B
Category	Measuring Instruments
Language	English