Sony KV-DW36K9H Service Manual page 8

OVP
(FROM D BOARD)
AC-RLY
(TO D BOARD)
OCP
(FROM D BOARD)
• I2C YCJ RETURN DATA
1 1 1
LED
BLINKING
TIMES
2
3
4
5
6
7
+B OCP If the IC701 Pin 44 (+B OCP DET) is high 2 seconds, turn AC-RELAY low (P-OFF) and make STANDBY
LED blinks twice.
+B OVP If the IC701 Pin 45 (+B OVP DET) is high 2 seconds, turn AC-RELAY low (P-OFF) and make STANDBY
LED blinks three times.
V-STOP If the return data Bit0 (VNG) from CXA2150Q is "1" while 2 seconds, turn AC-RELAY low (P-OFF) and
make STANDBY LED blinks four times.
AKB If the return data Bit2 (IKREF) from CXA2150Q is "0" and there is no change for 20 seconds, make
STANDBY LED blinks five times.
At this time, AC-RELAY continues to high.
LOW-B ERROR If the IC701 Pin 69 (AC-RELAY) is high and the Pin 43 (LOW-B ERROR DET) is low while 5 seconds,
turn AC-RELAY low (P-OFF) and make STANDBY LED blinks six times.
H-STOP If the return data Bit1 (HNG) from CXA2150Q is "1" while 2 seconds, turn AC-RELAY low (P-OFF) and
W. D. T. Observes the watch dock timer (BUS COMMUNICATION ERROR DET) bus communication. If errors are
detected, counts up and reform the bus communication and displays the number of time.
(No LED blinking).
Q727
Q729
OVP
LATCH
MAIN
MICRO-
COMPUTER
IC701
M308V2
OCP
LATCH
Q726
Q728
1 1 1 1
SYMPTOM
+B OCP
+B OVP
V-STOP
AKB
LOW-B ERROR
H-STOP
make STANDBY LED blinks seven times.
– 7 –
A1 BOARD
12C BUS
YCJ IC201
CXA-2150Q
A K B
H-STOP
V-STOP
WHEN
1 A K B
H-STOP
V-STOP
ARE ALL 1= LOW B ERROR
KV-DW36K9H
RM-970