Kenwood A-58 Service Manual page 12

A-58/68
CIRCUIT DESCRIPTION
3. u-COM : M38197MA-090FP (X14- [A/5], IC1)
3-1. Block diagram
FL TUBE : BJ268GK
25
Any figure in ( ) is a Pin number.
Change of distination
Key matrix (8 x 3)
10
/ @
(88) (80~87) (55~79)
(45~54) (42~44)
XR-1091ECP
BANDPASS FILTER
SERIAL I/O (36, 37)
(11, 12)
REMOCON
M38197MA-090FP
RESET
PROTECTION
INPUT SELECTOR
VOLUME
ROTARY ENCODER nie
(24~26) (21~23) (18~20)
DOLBY PRO-LOGIC SURROUND
MATRIX DECODER : LA2785
LC7538JM
MAIN SP. VOLUME
TONE CONTROL
N.B. CIRCUIT
TC9213P
DOLBY PRO-LOGIC SURROUND
PASSIVE DECODER : LV1010N
12
INPUT SELECTOR LED
CD DIRECT LED
CD REC LED
N.B. CIRCUIT LED
POWER STANDBY LED
DEPTH CONTROL LED
C/S SP. VOLUME
ELECTRIC VOLUME
CXA1842S
3-MODE SURROUND
& VOCAL CANSEL
M66310P
LED DRIVER
NJM2279D
VISUAL SELECTOR
|
TC9163N - TC9164N
SELECTOR
SELECTOR
FRONT SPEAKER
MUTE
OMNI SPEAKER
MUTE
POWER RELAY
=
1 FRONT SPEAKER
RELAY
C/S SPEAKER
AY REL
HEADIHONE
RELAY