Minolta DI450, Service Manual, Page: 20 / 271

D-1
1. SERVICE INSTRUCTIONS
1-1. IDENTIFICATION OF FUSES AND CIRCUIT BREAKERS
1-2. PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT
• The laser used in this copier is a semiconductor laser having the following specifications.
• When laser protective goggles are to be used, select ones with a lens conforming to the
above specifications.
• When a disassembly job needs to be performed in the laser beam path, such as when
working around the printerhead and PC Drum, be sure first to turn the copier OFF.
• If the job requires that the copier be left ON, take off your watch and ring and wear laser
protective goggles.
• A highly reflective tool can be dangerous if it is brought into the laser beam path. Use
utmost care when handling tools on the user’s premises.
• The printerhead is not maintainable in the field. It is to be replaced as an assembly
including the control board. Never, therefore, attempt to remove the laser diode or adjust
trimmers on the control board.
4002M014AB
Inverter Board
INV 250 V 2 A (F1)
Power Supply Board
PWB-C 250 V 4 A (6 pcs.)
DC Power Supply Main
PU1 <100 V Areas>
125 V 15 A (F1)
125 V 4 A (F2)
125 V 15 A (F3)
125 V 6.3 A (F4)
<200 V Areas>
250 V 8 A
(F1)
250 V 3.15 A (F2)
250 V 8 A
(F3)
250 V 3.15 A (F4)
Upper Fusing Roller Thermostat
TS1 250 V 10 A
DC Power Supply Sub
PU2 <100 V Areas>
125 V 4 A (F1)
250 V 3.15 A (F2)
<200 V Areas>
250 V 3.15 A (F1)
250 V 1.60 A (F2)
Max. power: 5 mW × 2
Output wavelength: 770 to 800 nm