Hitachi KHWS1W, Service Manual

Page: 11 / 42

KH-WS1
– 11 –
WS Function
No
No
No
Yes
LCD Display
A
WS
(SC)
LEVEL
1
STEREO LOCKED
W S S A T
Yes
Yes
Yes
Yes
At receiving
WS SAT
"SEARCH"
AFRST–1
NO BEAM
(when no signal
received)
Display
Broadcast name
(when any
signal received)
– 1 *
or
eg)
or
C
B
B
Is the display of part on LCD
followed on the following?
Is there any sound from
speakers even though the
display is correct?
Problem may in
WS circuit.
Proceed to item (2).
Does only the part
of Function
display appear?
LCD display is abnormal
though any trouble is not
found in receiving
operation.
Are the operations
of terminal pins for
CN304 followed on the
table 1 when CN304 is
disconnected?
Failure in IC301
or CN304
Figure 1
PG304
CN304
1 L H H 5 5
2 (L) H H H 4 4
3 Clock signal 3 3
5 Clock signal 2 2
6 L L Clock signal 1 1
7 H H H 7 7
8 L L L 57 71
9 L Clock signal 59 74
10 L Clock signal 58 72
11 L L L 60 75
Power Off
(STANDBY)
Power On
(NO BEAM)
At receive
IC101 No.
64 Pin 80 Pin
Table 1
2. WS section
(1) Determine whether WS circuit malfunctions or communications to control microcomputer malfunction.
KH/Pg 10-17 (TroubleSht) 10/11/00, 1:50 PM 11