Philips PM2517X - Page 3

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Table of Contents

Starting Problems OQ00634
Error Description7
Battery Cover7
Incorrect Reading in the Ma Ranges7
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
- Analog to Digital Converter27
- Digital Section27
- Direct and Alternating Current Measurement27
- Alternating Voltage Measurements27
- 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
- I N S I D E V I E W O F T O P C O V 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
- P I N N I N G H E30
- R O B E P L V30
- 3.3. 2. 7. Temperatu Re Measu Rements36
- Fixed Time36
- Fixed Level36
- Adc36
- 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
- Auto Ranging43
- Dh43
- Fa, Fb, Fc, Fd43
- Manual Ranging43
- Az44
- Ds1, Ds2, Laen44
- Ovr44
- Pol44
- Decimal Point45
- Polarity and Unit Indication45
- Serial Display45
- HEF 4511 B BCD to 7-Segment Latch Decoder48
- Specification of IC's Used48
- Function Table49
- Dual 1-0F4 Decoder/Demultiplixer50
- Character Decoder Driver51
- 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
- D a T a S I G N a L S E X a M P L E S53
- 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
- P I N N I N G O53
- 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-Finding Procedure71
- Service Hints71
- Fault Finding71
6 . 7 . a R a N G E S72
Stand by72
- No or Incorrect Power73
- Indication LED MAIN Is Not Lighted74
- No LED Lighted74
- Only Indication Led's Are Lighted74
- One 7. Segment LED Is Blanked75
- One Segment of All Led's Is Incorrect75
- Two 7. Segment Led's Are Blanked75
- Display Constant76
- Attenuator79
- Display Cannot be Adjusted to Zero79
- B L O C K D I a G R a M O81
- H F P R O B E P81
- Incorrect Ranging81
- No Auto Ranging81
- 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
- B L O C K D I a G R a M H E96
- Modifications96
- T I M I N G O F D I S P L a y U N I L96
- P I N N I N G H E104

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