Chapter 3 Replacing Assemblies
To Remove the Cover
3-4
Assembly-Level Service Guide
3
To Remove the Cover
The following steps are for removing the cover. The cover is removed to
access the board and cable assemblies, and all other internal parts.
WARNING
WHEN THE COVER IS REMOVED FROM THE INSTRUMENT,
LINE VOLTAGES ARE EXPOSED WHICH ARE DANGEROUS AND
MAY CAUSE SERIOUS INJURY IF TOUCHED. DISCONNECT
POWER.
1
Turn off the Counter and remove power cord.
2
To remove the rear bezel, loosen the captive screws on the sides
as shown in Figure 3-1 using the TORX 15 screwdriver.
Figure 3-1. Rear Bezel Removal
WARNING:
NO OPERATOR SERVICEABLE PARTS INSIDE, REFER SERVICING TO SERVICE TRAINED PERSONNEL.
WARNING:
FOR CONTINUED FIRE PROTECTION, USE SPECIFIED ˜ LINE FUSE.
1
Ext
Arm
Ref
In
I
N
P
U
T
S
!
AC LINE:
10 MHz Out
60 VA
100 - 120 VAC
200 - 240 VAC
50/60/400 Hz
50/60 Hz
OPTIONS
001 MS Oven
010 HS Oven
SERIAL PLATE
To Configure:
Hold Recall during turn-on.
Osc Adjust
RS - 232
ISM 1-A
92
FOR LABORATORY USE BY
QUALIFIED PERSONNEL
FOUR USAGE EN LABORATOIRE
PAR PERSONNEL QUALIFIE
HP-IB
Talk Only
2
3
Summary of Contents for 53131A
Page 1: ...Assembly Level Service Guide HP 53131A 132A 181A 225 MHz Counter ...
Page 2: ......
Page 14: ...Contents xii Assembly Level Service Guide ...
Page 22: ...Preface xx Assembly Level Service Guide ...
Page 23: ...1 Performance Tests Verifying Specifications ...
Page 97: ...2 Service ...
Page 149: ...3 Replacing Assemblies Disassembly and Reassembly ...
Page 173: ...4 Retrofitting Options ...
Page 191: ...5 Replaceable Parts ...
Page 201: ...6 Backdating Manual Changes ...
Page 218: ...Chapter 6 Backdating Backdating Specifications 6 18 Assembly Level Service Guide 6 ...
Page 219: ...7 HP 53131A 132A Specifications ...
Page 235: ...8 HP 53181A Specifications ...
Page 246: ...Chapter 8 HP 53181A Specifications General Information 8 12 Assembly Level Service Guide 8 ...
Page 252: ......
Page 254: ... Manual Part Number 53131 90039 Printed in U S A MARCH 1999 ...