ABL77 Service Manual Chapter 2: Analyzer Description
Module Descriptions, Continued
Battery control
board
The battery control board (REF: 902-680) monitors system power requirements
and diverts the incoming AC power to and from the battery pack accordingly (see
Figure 2-29). The batteries are charged in a controlled manner to prevent over-
charging. The battery charge status is sent to the analog board and then
retransmitted to the main computer so that it can be displayed on the screen for the
operator.
C12
ASSY 41174
J7
J1
J5
R1
J8J6
R27
R9
R8
R28
R19
R2
R21
R22
R3
R4
R12
R23 R24
R20
R6
R25
R7
R17
R11
R5 R10
R15
R14
R18
R13
D1
D8
D5
D2
D7 D6
D4 D3
Q2
Q3Q4
U7
J
4
J2
J3
Q1
Q6 Q5
Q8 Q7
C8
C9
C1
C2
C13
C14 C15
C7
C10 C11
C6
U3
C19
C3
C5
C4
U2
U5
U1
D9
D10
D11
D13
D14
D12
P4
P5 P7 P6
P8 P3 P2
P1
U4/9
U4/8
U6
VB5
U4/7
U4/6
U4/5
U4/1
U4/2
U4/3
U4/4
Figure 2-29
Continued on next page
Rev. F 2-39
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