Philips pm2521 - Page 6

2.
ACCESS
57
2.1.
Dismantling
the
PIVI2521
57
2.1
.1 .
Removing the top
cover
57
2.1.2.
Removing
the bottom
cover
57
2.1.3.
Removing
the front
assembly
57
2.2.
Replacing
parts
58
2.2.1.
Liquid
crystal display,
display
unit N3,
interconnection
rubber or function
knob ...
58
2.2.2.
Function switch
58
2.2.3.
Thermal
fuse
58
3.
CHECKING AND
ADJUSTING
62
3.1. DC
ranges
63
3.2. AC
ranges
65
3.3.
Trigger
level ranges
66
3.4.
Current
ranges
68
3.5.
Resistance
ranges
68
3.6.
Temperature ranges
69
3.7.
Frequency ranges
69
3.8.
Time
ranges
70
4.
FAULT-FINDING
71
4.1.
General
71
4.1.1.
Service
hints
71
4.1.2.
Fault-finding
procedure
71
4.1.3.
Fault-finding with the
signature analyser
71
4.2.
Fault-finding
flow-charts
72
4.2.1.
Basic
check
72
4.2.2.
Function
part
73
4.2.3. V .77
part
74
4.2.4. V
~
part
74
4.2.5.
Trigger
level part
76
4.2.6.
A .r:
and A
~
part
78
4.2.7.
fZ
part
79
4.2.8.
Analog
part
80
4.2.9. ADC
part
81
4.2.10.
Digital
part
82
4.2.11.
Free-run
84
4.2.12.
Display
part
86
4.2.13.
Power
supply check
88