6
– 1
1
Table
6
-1: Checkpoints TP0-TP3 on PCB6
Figure 11-11: Checkpoints CN2 on PCB1
Table
6
-2: Checkpoints CN2 on PCB1
3 ) If any of these voltages are not present or are
below a 10% tolerance, replace PCB1 (WK-
5713).
Refer to page
7
-5.
6.
5. 3 Verification of the Cooling
Fan, FAN1, Drive Circuitry
CAUTION
Before performing any portion of the procedure
below, make certain the unit is placed in the initial
set up condition as described in section
6
.4.1
"Preparation".
1) Verify the condition of the cooling fan, FAN1,
using a DC voltmeter. (The capability of the
voltmeter should be more than 50VDC.) Using
a DC voltmeter, measure between PIN 1 (Posi-
tive [+]) and PIN 2 (Negative [-]) of CN11 on
PCB3 (WK-5548). The location of connector
CN11 of PCB3 is indicated in Figure
6
-12.
When you measure the above voltage, do not
remove the connector. Conduct the measure-
ment while the connector plug and receptacle
are still connected.
Figure
6
-12: Verification of the FAN1
2) Using the measurement taken above, follow
the chart below for possible failure modes.
Test Point
PCB6
Reference
PCB6
ACCEPTABLE
VALUE
TP1
TP0
+5VDC
TP2
TP0
+12VDC
TP3
TP0
–12VDC
Test Point
PCB1
Reference
PCB1
ACCEPTABLE
VALUE
PIN 1 on CN
PIN 2 on CN2
+24VDC
2
1
CN2
PCB1(WK-5713)
FAN1
Status
Voltage
measurement.
(1PIN-2PIN of
CN2 on PCB1)
Remedy
Case 1 Rotating
DC 18 ~ 25V
FAN1 drive circuit is
normal.
Case 2 Rotating Below DC 18V
ReplacePCB1.
Refer to the page
7
-5.
2
1
CN2
PCB1(WK-5713)
TRANSTIG 200 Pi
ADVANCED TROUBLESHOOTING
SERVICE MANUAL