Kenwood KR-A5040 Service Manual page 7

KR-A5040
CIRCUIT DESCRIPTION
2. CXP5016-531S: Receiver microprocessor (FRONT UNIT: C901)
2-1. Key matrix connections
& | BACK UP CON.
64 wz C904
VOL. DOWN PWM +5V 0.1F/5.5V
KR : KEY RETURN BACK UP WP = VOL.UP
REMOCON PY3 EC RMC RES
G ¢ & (oe _—
PxO SC KRO EXTAL
61 0
60 X901 4.194 MHz
SOB KR1
SOA KR2 S. DATA
SI KR3 28 _ vop
57
KR4 VFDP
KR5 6 1G
KRG 22 2G
54
KR7 3G
BAND
53
KSO AG Grid
KSI 52 5G rids
KS2 cd C
PX3 (7)
50 '
1 Pp
49 |g
48 si6r
ae ae 47
PDO (8) VOL. LED «8 S150
46
2 SELST 2 S14n
DATA «£2 43 $13m
44
er cLocK «+! $12 |
1 43
2
NC ee $10 j
24 41 _ Segments
POWER $9i
eA 25 S07 a5),
E TYPE/ PD2 (10) MUTE 1 -" ae
K TYPE MUTE 2 S$1g
pre) (OOF 38
CD DIRECT
*Fe
=
S6f
SD S7e
sac ey, 32S 36
AM 1700k/ STEREO Ssd
AM 1610k 30 35
S. DATA : S5c
1 34
BUSY S4b
GND 33. s3a
LM7001
TC9162N/1C9164N
2-2. Setting of destinations, models and specifications depending upon diode key matrix
The setting of destinations, models and specifications is made according to the initial set diode key matrix.
In the following, "1" means "with diodes" and "O ", "without diodes".
1) Model Set SW
Model set SW Function
TYPE
TYPE TYPE
MODEL
TUNER DOLBY
VOL. CONT | Switched
REMOCON
1
2 3
BAND
SURROUND] with Motor
VIDEO1, 2
a0 | krveodo ETVPE)[—t '[Notprovieed| ti] St]
of wail 0 KRasoo [ot (| ot «| ot ([Notprovided |