TROUBLESHOOTING
REV.-A
5.3 UNIT REPAIR
This section indicates the points to be checked in response to problems and the measures to be taken based
on the result of the check. Utilize the checkpoints to determine and correct defective components. Tables
5-5, 5-7, and 5-9 below are divided into the five following columns:
Problem:
Symptom:
Cause:
Checkpoint:
Solution:
Indicates the difficulty.
Indicates potential condition which may be underlying the problem. You must
check to see which if any of the symptoms apply.
Indicates the potential source of the problem.
Perform this check to determine whether the problem is the result of the cause
listed at left.
Indicates the repair that will correct the fault.
Table 5-3. Troubleshooting Tools
Item
Driver Circuit
Checker E685
Description
Check the driver circuit by reading the LED indication.
Part Number
B765113101
5.3.1 SANPS/SANPSE POWER BOARD UNIT REPAIR
The following chart shows the main components used on the SANPSE board.
Table 5-4. SANPS(E) Board Parts List
Board Name
SANPS(E)
SANPS
SANPSE
Location Part Names
Description
Part No.
IC1
L5431-AA Adjustable Precision Regulator
X440164319
IC20
TL494CN PWM Control
X440034940
Q20
2SA1469
Transistor 60 V 5 A 20 W
X300146900
Q3, 21 2SA1020
Transistor 50 V 2 A 900 mW
X300102009
Q2 2SC3746
Transistor 60 V 5 A 20 W
X302374600
R31, 32
Fusible resistor 2 ohms 1/4 W
± 5%
X175400207
Q1
2SC3831
Transistor 500 V 10 A
X302383100
DB1
D3SBA40
Diode Bridge 400 V 4.0 A
X340330120
F1
ULTSC 2.0A-N1
Fuse 125 V 2.0 A
X502061011
T1
PT-P68A-NF
Transformer
Y567204003
Q1
2SC3460
Transistor 800 V 6 A 100 W
X302346000
DB1
RBV-406
Diode Bridge 600 V 4.0 A
X340400321
F1
BET 1.25A
Fuse 1.25 A 250 V
X502063040
T1
PT-P68E-NF
Transformer
Y567204002
5-10
LQ-510
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