Ricoh SP3 Biuletyn techniczny - Strona 28

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Model:
SP3
Subject:
Trobleshooting for the PSU problem
From:
Technical Services Sec. Service Planning Dept.
Classification:
Troubleshooting
Mechanical
Paper path
Other (
SYMPTOM
When the Start key is pressed, the machine powers down then powers back up.
CAUSE
An L8 temperature increase (to 105 degrees) caused over-current to flow through it when
the main power was turned on, which in turn activated the protective circuit causing the
power to turn off.
SOLUTION
The resistance of the circuit's R82 (for protection against over-current) has been increased
from 10 to 12 Ohms.
The P/N change for the DC Supply Board is as follows.
Old
New
part number
part number
AZ240031
A1959500
T
B
echnical
Part information
Electrical
Transmit/receive
)
Description
DC SUPPLY BOARD (230V)
ulletin
Date:
13-Mar-03
Prepared by:
Y.Urushihara
Action required
Service manual revision
Retrofit information
Q'ty
Int
Page Index Note
1-1
X/O
PAGE: 1/1
No.:
RA195017
75
15