Sanyo EM800TS - Test Procedures; Control Circuit Board Testing; Touch Key Board Testing

2. TEST PROCEDURES
COMPONENT
I
CHECKOUT PROCEDURE
I
RESULT
CONTROL
CIRCUIT BOARD
Measure the voltage: Between test points
TP- 1, TP-2, or TP-3 and ground between TP-
4 and TP-5. (See control circuit board on.
page 7)
NOTE
– Proceed with the check of the step-down
transformer, to seeifany oneofthemeasur-
ed values is different from the specified
values.
Test
TP- 1 TP-2 TP-3
TP-4/
Point TP-5
–5V –12V
-30V 2.OV
Voltage Dc Dc Dc Ac
TOUCH KEY
BOARD
Measure the resistance between terminals of
FPC connector after removing it from S101.
(Figure 2)
NOTE
- When reconnecting the FPC connector,
make sure the holes on the connector are
properly inserted in hooks of the plastic
fastener in S101.
MATRIX CIRCUIT FOR
TOUCH KEY BOARD
I
FPC CONNECTOR
r
------ .- ——- ——-—-—
1
I
Al 0
A2 O
A3~ A40 I
~---- ---- --— —-—
.4
II
I
0
)
6
)
5
, POWER
,Cl;
)
J
101
w
. .
II,
AUTO
7
OEF -
CIUICK
IC21
R
OST
SET
10!
-
I
w
I I
Resistance
value
w
When checking “START” key, connect ohm-
meter as illustration below.
n
G?
ohm-meter
\
Top
t
)
~:
g)
---.
---
Al
-. -
~ ;;
-.
I
--
A4
--
I
OPEN
c1
---
I
C2
---
C3
---
C4
II
--
C5
—.
/
TERMINALS OF FPC CONNECTOR
Figure
2