Circuit Description - Kenwood VR 3080 - Dolby Digital Receiver Service Manual

Push key I N P U T SELECTOR
TUNER STEREO
CD1 STEREO
MD/TAPE1 STEREO
VIDEO1 PRO LOGIC
VIDEO2 3 STEREO
DISPLAY VIDEO3 STEREO
VIDEO4 DSP
AV AUX STEREO
PHONO STEREO
4. Main microprocessor: uPD784214GF-527(X08: IC71)
4-1 Microprocessor periphery block diagram
(X08)IC16
VOLUME IC
TC9412
(X08)IC26
VOLUME IC
TC9412
(X08)IC36
VOLUME IC
TC9412
(X08)S91-96
TACT KEY
(X08)IC91
FLDRIVER
uPD780204
(X09)ED1
FL
(X05)
TUNER UNIT
(X08)IC72

CIRCUIT DESCRIPTION

S P A S P B MUTE
P. CALL P. CALL
OFF
UP DOWN
(X08)S97
ROTARY-
ENCODER
DESTYINA TI
ON SW
PD784214GF-527
(X08)
LCD REMOTE
IR RECEIVER
TRANSMIT IC
DESTINATION
uPD17215
KRF-V7772D/VR-3080
ATT
AUTO/STEREO MANUAL/MONO
ON FM
(DOLBY DIGITAL LED : OFF
TONE (TUNED)
+10 (light on) OFF (light off)
ARENA JAZZ CLUB
THEATER STADIUM
CATHEDRAL
TAPE2
OFF
INPUT LEVEL
0dB -3dB
(X08)IC15
SELECTOR IC
TC9162
(X09)IC5
SELECTOR IC
NJU7312AL
(X09)IC4
SELECTOR IC
NJU7313AL
(X08)IC71
MAIN UCOM
(X08)A91
IRREMOTE
DISPLAY MODE
ON)
(Press the key for 2 secs)
ANALOG
IR RECEIVER A(ON)
ON
-6dB
(X08)IC42
TONE CONTROL IC
TC9184
(X08)IC3
CODEC
CS4226
(X08)IC51
DSP
YSS912
(X09)K2-5
SP.RELAY
MUTE
(X08)J81
SYSTEM
CONTROL
(X08)J84
IR RECEIVER
DIGITAL
OFF
7