Sanyo EM-842WS User Manual

Page 18

COMPONENT

CHECKOUT PROCEDURE

RESUL

RESULTTTTT

Measure the resistance : Across two terminals

Normal reading :

with an Ohm-Meter on highest scale.

Momentarily indicates several Ohms,

and gradually returns to 10 Meg-Ohms.

Abnormal reading :

Indicates continuity or 10 Meg-Ohms
from the beginning.

Measure the resistance : Across two terminals

Normal reading :

with an Ohm-Meter on R x 10,000 scale.

Indicates about the middle position in
one direction (forward direction) and
infinite Ohms in the reverse direction,
using meter which is provided with a
9 volt battery.

NOTE

- Some digital meter may show over

even in a forward direction because
low measuring voltage of meter does
not allow the meter current to pass
through the High Voltage Diode.

Abnormal reading :

Indicates continuity or infinite Ohms
in both directions.

Measure the voltage : Between test point TP-1,
TP-2, TP-3 or TP-4 and Ground between TP-5
and TP-6 (See Control Circuit Board on
page 19).

NOTE

- Proceed with the check of the Step-Down
Transformer, to see if any one of the measured
values is different from the specified values.

Figure 8

Ohm-Meter

Figure 7

Ohm-Meter

- 5 -

Test

TP-5 /

Point

TP-1 TP-2 TP-3 TP-4

TP-6

Voltage -5V

-15V -25V -36V

2.0V

CONTROL
CIRCUIT
BOARD

HIGH-VOLTAGE
DIODE

HIGH-VOLTAGE
CAPACITOR
including
BLEEDER
RESISTOR