Circuit Description - Kenwood R-A100 Service Manual

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R-A100/A150/V300/V350
1. Back up data and initial data
POWER ON/OFF
MAIN VOLUME LEVEL
AUDIO INPUT • SELECTOR
VIDEO INPUT • SELECTOR(R-V300/V350)
TAPE1/MD
TAPE2/MONITOR
FL DISPLAY MODE
SOURCE DIRECT(R-V300/V350)
SURROUND(R-V300/350)
DSP MODE(R-V300/V350)
SPEAKER CH.LEVEL(R-V300/V350)
BALANCE
DELAY(R-V300/V350)
EFFECT LEVEL(R-V300/V350)
TONE BASS
TONE TREBLE
INPUT LEVEL
SRS 3D(R-A100/A150)
SRS 3D LEVEL(R-A100/A150)
TUNING MODE(AUTO/MONO)
PRESET MEMORY(40ch)
LAST BAND
FM LAST FREQUENCY
AM(MW) LAST FREQUENCY
LW LAST FREQUENCY
LAST P.ch
RDS DISPLAY MODE(R-A150/V300)
TA/NEWS/INFO.(R-A150/V300)
CLOCK DISPLAY
TIMER
SLEEP TIMER
VOICE ACTIVATE KEY WORD
VOICE ACTIVATE
2. Main microprocessor uPD780206GF025 (X14-, IC1) MIYCX type
2-1 Microprocessor periphery block diagram
(X05) IC2
(X14) IC52 (E,T type only)
(X09) IC4, IC5
(X08) Q1,2,5~8,15
(X05) Q6~8
(X14) IC51
(E,T type only)
VOICE ACTIVATION
6

CIRCUIT DESCRIPTION

uPD780206GF027 (X14-, IC1) KPTE type
(X14) ED1
K E Y
S C A N
REMOCON
u-COM
PLL IC
RDS DEMO. IC
ELECTRIC VOL.
TONE CONT.
uPD780206GF025
uPD780206GF027
+10dB ATT.
MUTE
VOICE INPUT
POWER ON
ACTIVE VOICE ON
VOICE VOICE
SET 1 SET 2
: OFF
: -65dB
: TUNER
: VCR
: TAPE1
: OFF
: SELECTOR
: OFF
: STEREO
: ARENA
: 0dB
: CENTER
: 20ms
: 3
: 0dB
: 0dB
: 0dB
: OFF
: LEVEL 0
: AUTO
: TEST PRESET FREQUENCY
: FM
: 87.5MHz
: 531kHz (CH.SP 9kHz)
: 530kHz (CH.SP10kHz)
: 153kHz
: [--ch]
: FREQUENCY DISPLAY
: OFF
: AM 12:00
: OFF
: OFF
: NON SPECIFIC SPEAKER(RD:KENWOOD)
: ON
FL DISPLAY
(X14)
KEY MATRIX
(X14) S28, S29
K E Y
R E T U R N
(X09) IC2
u-COM
(X09) IC3
(X09) IC1, IC301
(X09) IC1
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SERIAL
COMMUNICATION
ROTARY ENCODER
(VOLUME CONTROL)
DELAY IC
DSP IC
AUDIO SELECTOR
VIDEO SELECTOR
SP. RELAY
PROTECTION
POWER
CHIP ENABLE
PHONES DETECT
RESONATOR(X1. MAIN)
X'TAL RESONATOR (X2. TIMMER)
RESET
27/9/2013