Olivetti ECR8200, Руководство по обслуживанию

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3-12. BATTERY CIRCUIT
VBB voltage is used by CPU, external RAM and FROM.
It is supplied by dry battery at the time of back-up.
Battery specification
Type
:
AA
x
3pcs
Voltage
:
4.5V
CAUTION;
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
1
2
CN13
B2B-XH-A
CE
1
VSS
2
VOUT
3
VIN
4
U13 XC6215
C140
1uF
C28
0.1uF
VBB
B
E
C
Q14
2SC2412K
R201
*10K
R205
750
R204
62
R203
39
A
K
D18
1SS355
A
K
D17
1SS355
A
K
D16
1SS355
VCC3
A
K
D
14
*E
C
31Q
S
06
A
K
D
19
*R
B
520
S
-30
R202
0
VBB
R200
10K
(1)
Trouble shooting
- Check whether the batteries are supplied in the battery box.
- Check the voltage of each battery. (It should be over 1.1V per battery.)
It outputs less than 1.1V per battery (less than 3.3V with 3 batteries) - - - Replace the battery.
It outputs over 1.1V per battery (over 3.3V with 3 batteries). - - - Check the voltage at point (1).
- Check the voltage at point (1)
It outputs almost same voltage as battery voltage - - - Replace Main Board.
It outputs much less than the battery voltage or 0V - - - Replace Battery unit.
Service Manual 50