Block Diagram - Kenwood KRF-X7775D Service Manual

5.Test Mode
5-1 Setting Method of the Test Mode
•Turn on the power supply while pressing the "INPUT SELECTOR DOWN" key, to make a set in test mode.
5-2 Canceling the Test Mode
•The system is initialized and the test mode is cancelled if unplug the AC power cord from an AC power wall outlet.
5-3 Contents of the Test Mode
✽ The following operation is available when the FL is all lighting up mode only.
Key
SOUND Set up the RF frequency to428MHz.
LISTEN MODE Set up the RF frequency to422MHz.
THX Indicated the tuner destination in the FL.
MEMORY Changed the dimmer off/1/2 cyclically.
6. Main Microcomputer: uPD784217A516 (X13, IC3)
6-1 Main Microcomputer Periphery block diagram
X11(IC2/21)
Selector IC
NJU7312AM
X11(IC3/22/24)
Selector IC
NJU7313AM
X11,IC23
Selector IC
NJU7311AM
X11,IC6
Vol. IC
TC9459N
X11,IC8
Vol. IC
TC9459N
X11,IC10
Vol. IC
TC9459N
X11,IC12
Vol. IC
TC9459N
X11,IC35
Vol. IC
TC9459N
X11,IC34
Tone Cont. IC
TC9184AP
Model Type
X05-513X, IC2
Tuner Unit
LC72131
X05-510X, IC2
PLL for Remote
Control
LV2105V
Except KRF-X9995D and
KRF-X7775D
X25,IC401
RF/IR IN
SWITCH
KRF-X9995D/
VR-5900 only
CIRCUIT DESCRIPTION
Operation
X13,IC6
LCD Remote Cont.
Transmitter IC
uPD17215GF
X13,IC5
Serial Parallel
TC74HC164AF
97~99 1,2
Main Microcomputer
uPD784217A516
53
25~80
25,26,30
93 8,10
Rotary
Encoder
X25,S19
Relay Cont.
IR SEL.
KRF-X7775D/X7775D-S/VR-5080/5090
Display
RF BAND
RF BAND
EX. TYPE E1
ALL FL Light ON
Protection
Fan
94,95 88
78~82
73,74
65,66
X13, IC3
36
3~7
48,60
54
58,59
REM2
50
Video
Selector IC
IR Receiver
Except KRF-X7775D (M/X/V TYPE) and
KRF-X9995D (M/X TYPE)
X07,K6
PWR Relay
X07,K1~k4
SP. Relay
Mute Circuit
X08,IC43
Sub u-Com
uPD784224K507
TEXT
UART
X25,ED1
X25,J201 FL
SL16
X25,IC1
FL Driver
uPD780204
Power/Input
Down Key X25
Panel Key
Destination
SW
KRF-X9995D
Panel
Door
VR-5900 only
X13(IC502,504,505)
(IC603,604,701~703)
7