Kenwood KRF-V7771D Service Manual page 9

KRF-V7771D/V8881D/VR-2080/2090
QQ
3 7 63 1515 0
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
AV AUX STEREO
PHONO STEREO
4. Main microprocessor uPD78078GF-080 (X08 : IC69)
4-1 Microprocessor periphery block diagram
(X08) IC60,71,89
(X25) IC53
OTHERS
VIDEO IC TC74HC153AF
NJU3713D
PROTECTION1,
TE
L 13942296513
PROTECTION2, FAN1,
SEL_DATA, SEL_CLK,
FAN2, FAN3, DIN_1, DIN_2
VIDEO_STB
(X11) IC1,2,42
(X25) IC23
SEL IC1/2
TC9162~9164
SEL_DATA, SEL_CLK,
SEL_STB1, SEL_STB2
(X11) IC21,23,25,27
VOLUME IC
TC9412/9413AP
VOL_DATA, VOL_CLK,
VOL_CE1
(X11) IC44
TONE IC
TC9184AP
VOL_DATA, VOL_CLK,
VOL_CE2
(X11) (X25)
REMOCON
REMOCON_IN1 (FRONT PANEL)
www
REMOCON_IN2 (REPEATER)
.
10
CIRCUIT DESCRIPTION
S P A S P B
P. CALL P. CALL
OFF
UP DOWN
DSP
(X25) IC 90
PERFECT MACRO MUTE
POWER DETECT
TU_PDET, U_PDET, MUTE_A, MUTE_B,
USEL_CTLA, USEL_CTLB SW_MUTE, -20dB_ATT,
USEL_TR VIDEO_MUTE, SCH_MUTE
MAIN u-COM
uPD78078GF-080
(X08)
(X11)
IC68
IC602
TUNER/RDS
TUNER PLL IC
SAA6579
LC72131
RDS_DAT, RDS_CLK,
PLL_CLK, PLL_DATA,
RDS_SLEVEL, T_MUTE,
x ao
PLL_CE, PLL_DO
y
SD, STEREO
i
8
MUTE
ATT
AUTO/STEREO MANUAL/MONO
ON FM
(DOLBY DIGITAL LED : OFF
TONE (TUNED)
+10 (light on)
ARENA JAZZ CLUB
THEATER STADIUM
CATHEDRAL
TAPE2
OFF
INPUT LEVEL
0dB -3dB
(X08) IC67
REMOCON COMMUNICATION IC
Q Q
SMK_REQ, SMK_ENB, SMK_RWR, SMK_D0,
3 6 7 1 3
SMK_D1, SMK_D2, SMK_D3, SMK_D4, SMK_D5,
SMK_D6, SMK_D7
MEGA CHANGER
(CD-0000M)
UART_RXD, UART_TXD,
u163
.
2 9 9 4 2 8
DISPLAY MODE
ON)
OFF (light off)
(Press the key for 2 secs)
ANALOG
IR RECEIVER A(ON)
ON
-6dB
(X11) S1
ENCODER
DESTINATION
ENC_VOL1, ENC_VOL2
1 5 0 5 8 2 9 9 4
999_888, 8_16, TSW_B,
TSW_1, TSW_2,
TSW_3 (CH, SP)
(X07) K1~6
(X25) K1
RELAY
RELAY_A, RELAY_B,
RELAY_CS, RELAY_TR,
RELAY_POWER, EXT_OUT
RELAY_MULTI
SERIAL
SDATA, SBUSY
(X25) IC61
FL DRIVER
FL_DOUT, FL_DIN,
FL_CLK, FL_STB,
DPU_RST
(X08) IC66
SUB u-COM
uPD78058GC
SUB_RESET, SDT, MOT,
m
MCK, MREQ, SREQ
co
9 9
DIGITAL
OFF
2 8 9 9