Test Mode - Kenwood VR-4090-B Service Manual

3. Test Mode

3-1 Entering the Test Mode
While pressing the "INPUT SELECTOR DOWN" key, plug the power cord into AC wall outlet.
3-2 Cancelling the Test Mode
Initialized and cancel the test mode if pulling out the power cord.
Not initialized and cancel the test mode if the power switch turns off.
3-3 Contents of the Test Mode
3-3-1 Key Operation
The following operation is available when the FL is all lighting up mode only.
KEY
SOUND Set up the RF frequency to 411.3MHz.
LISTEN MODE Set up the RF frequency to 414.3MHz.
INPUT MODE Set up the RF frequency to 411.3MHz.
SET UP Indicates Tuner destination on the FL.
MEMORY Changed dimmer off/1/2cyclically.
BAND KEY Indicates the u-com version.
4. Main Microprocessor : uPD784215-GF570 (X13, IC23)
4-1 Main Microprocessor Periphery Block Diagram
X11, IC3
X13, IC81
SELECTOR IC
NJU71311
X11, IC5
SELECTOR IC
X13, IC82
NJU71312
X25, IC4
X11, IC1 SELECTOR IC
X25, IC3
NJU71313
VOL. IC
VOLUME IC
X11
TC9459F
IC301~304
VOLUME IC
TC9459F
VOLUME IC
TC9459F
VOLUME IC
TC9459F
TONE CONTROL IC
TC9184
Model
X05, IC2
TUNER UNIT
LC72131
PLL for Remocon
LV2105V
IR/RF Front/Rear
switch
CIRCUIT DESCRIPTION
OPERATION
PROTECTION
X13, IC22
LCD REMOTE
TRANSMIT IC
uPD17215
(Main) u-com
µPD784215-GF570
X13, IC71
ROTARY
ENCODER
RELAY CONTROL
VR-4080-B/4090-B/4700/4900
DISPLAY
RF 417.3MHz
RF 414.3MHz
RF 417.3MHz
EX. TYPE E1 TYPE E2
All FL light on ALL FL light off
EX. Ver . XXXXXX-X
FAN
POWER RLY
SP. RLY
MUTING
SUB u-co m
uPD784036
UART
SL16
POWER ,
INPUT UP/DOWN KEY
DESTINATION
PANEL DOOR
VIDEO
X13, IC1/5/7/8
SELECTOR IC
BA7649
IR RECEIVER
IR/RF Front/Rear
switch
X08, IC40
X25, ED1
FL
X25, IC1
FL DRV
uPD780204
PANEL KEY
7