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KRF-X7775D/X7775D-S/VR-5080/5090
CIRCUIT DESCRIPTION
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 LISTEN MODE THX MEMORY Operation Set up the RF frequency to428MHz. Set up the RF frequency to422MHz. Indicated the tuner destination in the FL. Changed the dimmer off/1/2 cyclically. Display RF BAND RF BAND EX. TYPE E1 ALL FL Light ON
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 X13,IC6 LCD Remote Cont. Transmitter IC uPD17215GF X13,IC5 Serial Parallel TC74HC164AF
Protection
Fan
X07,K6 PWR Relay X07,K1~k4 SP. Relay
Vol. IC TC9459N
X11,IC8
97~99
1,2
94,95
88 78~82
Mute Circuit X08,IC43
Vol. IC TC9459N
X11,IC10
73,74
Sub u-Com uPD784224K507
Vol. IC TC9459N X11,IC12 Vol. IC TC9459N
X11,IC35
65,66
X13, IC3 Main Microcomputer uPD784217A516
3~7 36
TEXT UART
X25,J201 SL16
X25,ED1 FL X25,IC1
Vol. IC TC9459N
X11,IC34
FL Driver uPD780204
Power/Input Down Key X25 Panel Key
Tone Cont. IC TC9184AP
Model Type X05-513X, IC2
53 25~80
48,60
54
Destination SW Panel Door
KRF-X9995D VR-5900 only
Tuner Unit LC72131
X05-510X, IC2
58,59 25,26,30 93 8,10 REM2 50
PLL for Remote Control LV2105V
Except KRF-X9995D and KRF-X7775D X25,IC401 RF/IR IN SWITCH KRF-X9995D/ VR-5900 only
Rotary Encoder
X25,S19 Relay Cont.
Video Selector IC
X13(IC502,504,505) (IC603,604,701~703)
IR SEL.
IR Receiver Except KRF-X7775D (M/X/V TYPE) and KRF-X9995D (M/X TYPE)
7
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