DOWNLOAD Panasonic CF-48 Service Manual ↓ Size: 5.5 MB | Pages: 107 in PDF or view online for FREE

Model
CF-48
Pages
107
Size
5.5 MB
Type
PDF
Document
Service Manual
Brand
Device
PC / NOTEBOOK COMPUTER
File
cf-48.pdf
Date
PREV: Panasonic CF-31CZAAX / CF-31CZAAXF9 Simplified Service Manual

Panasonic CF-48 Service Manual ▷ View online

4 - 1
4. Diagnosis Procedure
4.1. Basic Procedures
The basic procedures for diagnosis, disassembly, and test of defective parts of a set to be repaired are summarized below. For
details, refer to relevant pages in the Service Manual.
l
l
l
l
l
 Flow Chart
Power On Self Test
OCCURRENCE OF 
TROUBLE
Automatic diagnosis takes 
place when the power switch
is set to ON.
Power sw is set to ON.
POST NORMAL 
FINISH
POST ERROR 
OCCURRENCE
DEFECTIVE PARTS 
SORTING
SELF-DIAGNOSIS TEST (IF REQUIRED)
Conduct a self diagnosis test when
it is necessary for conduct
trouble diagnosis.
TROUBLESHOOTING
Defective parts are sorted by
referring to symptoms.
SELF-DIAGNOSIS TEST
After repair, conduct a self-
diagnosis test and make sure that the
repaired set operates properly.
DISASSEMBLY PROCEDURE
Replace defective parts.
REPAIR WORK
INSPECTION
TEST FAILED
TEST OK
END OF 
REPAIR WORK
4 - 2
4.2. Power-On Self Test (Boot Check)
4.2.1. Outline of POST
The set has a boot check function called POST (Power-On Self Test) in it. The condition of the main body is diagnosed by checking
beep sound or error code.
l Start .............Test begins automatically when power switch is set to ON.
l Normal finish .....After memory checking, a beep sound is issued once and the set is placed into automatic stop.
Note: If no error occurs, nothing is displayed.  (No display of OK, etc.)
4.2.2. Error Diagnosis by Checking Beep Signal Sound
The beep sound is as follows:
 = long sound (about 0.4 sec.),        = short sound (about 0.2 sec.), Length between sounds is about 0.1 sec.
 l Table of errors classified by beep sounds
(1 (long sound) -2-3-4)
(Length of bar shows length of sound.)
Diagnosis
Beep signal sound
Error message
1(long sound)-2
BIOS ROM error
BIOS ROM error
RAM error
Keyboard controller error
RAM error
RAM error
RAM error
1-2-2-3
1-3-1-1
1-3-1-3
1-3-4-1
1-3-4-3
1-4-1-1
BIOS ROM error
2-1-2-3
Occurrence of unexpected offering
2-2-3-1
Main board
(Note)  A beep sound is also issued in case of other I/O trouble.
4 - 3
4.3.
List of Error Codes
4 - 4
Page of 107
Display

Click on the first or last page to see other CF-48 service manuals if exist.

RANDOM: