Power Supply Replacement; Controller Circuit Board Replacement - Mizuhosi 5803 Manuel Du Propriétaire

Battery Function Check
1. Verify power cord is disconnected from power source (AC outlet).
2. Turn on/off power-switch to "ON" (utilizing battery power).
3. Verify all hand pendant lights illuminate on and off sequentially.
4. Verify hand pendant and base panel battery status lights:
 Green = batteries installed correctly and charged.
 Red = batteries need charging.
5. Fault Light on and battery status light red = batteries not connected properly, or
completely discharged. Turn on/off power-switch "OFF" immediately and check:
 Batteries connected properly.
 Batteries have been charged.
 Repeat test to verify that all lights on hand pendant illuminate on and off
sequentially and battery fault light is dark. If not, contact Mizuho OSI technical
service.

9.5 Power Supply Replacement

1. Switch off the base at the circuit breaker and disconnect the power cord from the
source.
2. Remove the 10-32 screws holding the input plate and circuit breaker plates to the
cover.
3. Remove the head end base covers.
4. Disconnect the negative battery wire.
5. Disconnect all cables from power supply and line filter. Remove transformer wires
from power entry module.
6. Remove the three power supply tray assembly mounting screws and remove tray
assembly.
7. Install replacement in the reverse order.

9.6 Controller Circuit Board Replacement

1. Switch off the base at the circuit breaker and disconnect the power cord from the
source.
2. Remove the 10-32 screws holding the input plate and circuit breaker plates to the
head end base covers.
3. Remove the head end base covers.
4. Disconnect the negative battery wire.
5. Disconnect all cables from controller circuit board
6. Remove the three 10-32 screws mounting the controller circuit board tray and
remove tray assembly.
7. Install replacement in the reverse order.
MIZUHOSI 2009
34
NW0498 Rev E