Table Of Contents - Philips PM2517E Service Manual

Table of Contents

Starting Problems Oq00634
Battery Cover7
Incorrect Reading In The Ma Ranges7
Error Description7
Textplates12
Table Of Contents13
Technical Data17
Electrical Specifications17
D.c Voltage Measurements17
A.c Voltag Measurements17
D.c. Current Measurements18
A.c. Current Measurements18
Resistance Measurements18
Diode Measurements19
Temperature Measurements19
General Data19
Power Supply With Rechargeable Batteries20
Optional Accessories21
Temperature Probe21
Data Hold Probe21
Accessories Supplied With The Instrument I21
Hf Probe Type23
Optional Accessories I23
Rf Probe Pm24
Circuit Description26
General26
Principle Of Operation26
Alternating Voltage Measurements27
Direct And Alternating Current Measurement27
Digital Section27
Analog To Digital Converter27
Display28
Power Supply28
Detailed Circuit Description29
Analog Section29
A.c. Voltage Measurements30
C I R C U I T D E S C R I P T I O30
G E N E R A30
A D J U S T I N G T A B L30
P O W E R S U P P L30
R O B E P L V30
P I N N I N G H E30
P I N N I N G A N D B L O C K D I A G R A M O F O30
I N S I D E V I E W O F T O P C O V E30
Adc36
Fixed Level36
Fixed Time36
3.3. 2. 7. Temperatu Re Measu Rements36
Output37
Example Of A Data Signal37
Voltage To Current Convertor38
Adc Switching Part38
Control Logic40
D I S P L A Y40
A D40
Control Signals41
Clock41
Data41
Aut41
R A N G I N G41
Manual Ranging43
Auto Ranging43
Dh43
Fa, Fb, Fc, Fd43
Az44
Ovr44
Ds1, Ds2, Laen44
Pol44
Serial Display45
Decimal Point45
Polarity And Unit Indication45
Specification Of Ic's Used48
Hef 4511 B Bcd To 7-Segment Latch Decoder48
Function Table49
Dual 1-0F4 Decoder/Demultiplixer50
Character Decoder Driver51
D A T A S I G N A L S E X A M P L E S53
B I O C K D I A G R A M O F D I G I T A L S E C T I O53
P I N N I N G O53
D I S M A N T L I N G T H E P L V53
F A U L T F I N D I N G B L O C K D I A G R A53
Digital Control And Autoranging Circuit54
Specifications Of Inputs And Outputs60
Specification Of The Inputs And Outputs62
Access65
Dismantling The Pm 251765
Replacing Parts65
Slide Switch65
Window66
Battery Springs66
Display Unit66
Shunt66
Checking And Adjusting68
Adjusting Table69
Fault Finding71
Service Hints71
Fault-Finding Procedure71
6 . 7 . A R A N G E S72
Stand By72
No Or Incorrect Power73
No Led Lighted74
Only Indication Led's Are Lighted74
Indication Led Main Is Not Lighted74
Two 7. Segment Led's Are Blanked75
One 7. Segment Led Is Blanked75
One Segment Of All Led's Is Incorrect75
Display Constant76
Attenuator79
Display Cannot Be Adjusted To Zero79
No Auto Ranging81
Incorrect Ranging81
H F P R O B E P81
B L O C K D I A G R A M O81
V-Ranges82
Oscillating Between Two V Ranges82
D A T A H O L D82
E H T P R O B E P83
B L O C K D I A G R A M H E85
P A B T S L I S T88
L R R T88
O L T A G E M E A S U R E M E N T88
U R R E N T M E A S U R E M E N T88
A D J U S T I N G E L E M E N T88
O A R D S C O M P O N E N T S I D E P I88
Parts List90
Mechanical90
L V L E C H A N I C A L90
O L T A G E M E A S U R E M E N T S90
Electrical92
Resistors92
M O U N T I N G T H E P O W E R S W I T C H K N O95
Modifications96
T I M I N G O F D I S P L A Y U N I L96
Component Side100
Conductor Side100
Function Switch Lay-Out100
Survey Of Used Components101