R E P L A C E M E N T O F T H E B A T T E R Y; D E M O U N T I N G - Philips SPENDEX 40 Maintenance Manual

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S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
7 DEMOUNTING AND MOUNTING
7 . 1 G e n e r a l
In this chapter instructions are given for the mounting and
demounting of the exchangeable units.
The following boards are mounted on each other by means of distant
pieces:
- line interface board and modem
- synthesis board and analysis board
- key generator board and controller board
- timing board and telephony board
The connecting board is mounted in the red compartment of the housing
and can be reached after removal of the front panel.
The line interface board/modem assembly is mounted in the line
interface compartment of the housing and can be reached after removal
o f t h e m a i n s / l i n e fi l t e r.
The key memory board and the assemblies synthesis board/analysis
board, key generator board/controller board and timing
board/telephony board are found in the red compartment and can be
reached after removal of the cradle and the upper cover.
The power supply unit is mounted in the power supply compartment of
the housing.
7 . 2 R e p l a c e m e n t o f t h e b a t t e r y
The battery is placed in the mains/line filter. The battery need only
be replaced every other year.
- Loosen the 4 captive M3 socket head screws, with which the battery
m c o v e r i s fi x e d . U s e f o r t h i s p u r p o s e a r o u n d h e a d s c r e w d r i v e r , s i z e
2.5;
- Remove the battery cover;
- Take the battery out of the clamp with the help of the pull strip;
- Place the new battery together with the pull strip between the
clamps. Pay attention to the polarity;
- Replace the battery cover and screw down again the 4 socket head
screws;
- Mention the new replacement date of the battery on the text plate
of the battery cover.
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7 . 3 D e m o u n t i n g
7 . 3 . 1 D e m o u n t i n g o f t h e f r o n t p a n e l
- Remove the USFA-sealing strip. This strip is found on the bottom
side of the apparatus on the dividing line of front panel and
housing;
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