Text preview for : kvt-m700 service manual.pdf part of Kenwood kvt-m700 Kenwood kvt-m700 Service manual
Back to : kvt-m700 service manual.p | Home
LCD RECEIVER
KVT-M700
SERVICE MANUAL
© 2002-1 PRINTED IN KOREA
B51-7885-00 (K) 3397
(K : For North America) (E : For Europe)
(M : For Other Areas) The following reference numbers
with accessory parts are the same reference
numbers used on EXPLODED VIEW
and PARTS LIST.
DC14
303
246
824
217
321
DC11 322 323
320x2 213 251x2
DC12 305x2
DC13
317
216
318
319x2
KVT-M700
2
5L CONNECTOR NAVI INTERFACE J2 J1
J6 J3 MONITOR INTERFACE DC CONNECTOR
WEDGE ONESELF IN NAVI VOICE AND SELECTED AUDIO LINE
POWER
NAV RX
L MUTE
GREEN
NAV TX
DATA C
DATA H
V GND
REQ C
REQ H
A GND
REMO
MUTE
AV1 R
AV2 R
SYNC
AV1 L
AV2 L
BLUE
CON
GND
RED
ACC
RR+
RST
ANT
CLK
EXT
B.U.
FR+
RL+
RR-
FL+
FR-
RL-
FL-
3 3 8
8
Q18 3 2
5L : 1200mV 7
Q17
IC15 IC13 IC5
ISOLATION 2 ANALOG 2 ISOLATION 5 Q22
AMP SWITCH AMP
4 4
2 2 2 2 20MHz
NAVI : 1200mV AV1 :
500mV IC9
M CON
CH CON
M MUTE
CH MUTE
CH RST
M REQ C #
M REQ H #
CH REQ C #
CH REQ H #
M CLK
CH CLK
CH DATA H
MD DATA H
MD DATA C
CH DATA C
AV2 : 500mV PHONE
FM/AM
FRONT END IC6
2 SEL 1
W02-331x-05 RESET # RST IC
BLOCK DIAGRAM
SEL 2
S METER S METER P CON 3
EXT CON
IFC OUT IFC OUT ANT CON B.U. DET
AM +B AM +B B.U. DET # ONLY
FM +B 4 4 FM +B SYSTEM u-COM ACC DET #
PLL CLK PLL DATA IC4
PLL DATA PLL CLK
AUDIO OUT NOISE 2 MUTE (NOR)
MUTE SEL SWITCH
RDS OUT 3 R CLK
QUAL 8
BEEP
R DAT
PRE MUTE # IC1
IC17 (K,E) (M)
NOISE
P-MUTE #
AFS #
3 47x4 AUDIO
SDA
TYPE TYPE
SCL
NOISE P-STBY
P-SVR AMPLIFIER
AMPLIFIER ONLY ONLY
IC16
3 2 2 2 2
RDS 2
DEMODULATER IC11 IC7
S MUTE
AFS
AC IN FR
AC IN FR
AC IN RR
QUAL
AC IN RL
AC IN FL
AC IN FL
CD R OUT
TAPE R
CD L OUT
TAPE L
SDA 2 2 SDA SYSTEM E'S LR 2
4.33MHz SCL SCL RR
LF LF LF 2
RF 4 RF
FM (K) : 470mV 3 CD R RF
FM (E,M) : 251mV LR LR
CD GND
AM (K) : 230mV CD L
RR RR AUX OUT L 2 Q27,29
AM (E,M) : 230mV IC2- 2 AUX OUT R MUTE
AC OUT L AUX IN L
AM E-VOL AC OUT R AUX IN R 2x3
MPX IC8,
10,12
PRE
AMPLIFIER
2 2 2
4.5V 3 PRE OUT
L R L R L R
NON-FAD REAR FRONT KVT-M700(1/2) (E,K,M)
AV IN2 AV IN1 AV OUT
V L/R V L/R V L/R
(X14- ) (A/2)
IC203
J3
COMP VIDEO
to X25
AV 2L VO1
VO2
AV 2R
AV 1L IC105 IC102
AV 1R ISO ISO
A GND IC202
NAVI SYNC COMP VIDEO
to X35
NR Y/C
NG VI1 (X35- ) (A/2) RGB (4.0VP-P)
VI2 from X14 MM1389 RGB
NB VI3 NR
V GND NG
NB
M REQ C SYNC CUT (E TYPE ONLY)
M REQ H BU4066 BU4066
M DATA C to AB1 AO1 Y IC301
M DATA H u-COM AB2 AO2 C. TRAP IC701 V COM VCOM DRIVER VCOM
C
BLOCK DIAGRAM
M CLK CHROMA DECODER
M CON +13V/-16V
REMO IC101
RX
HD,VD
DIFFERENCE
DIFFERENCE
TX
OSD RGB
RST ISO u-COM
TIMING
COLOR
COLOR
CONTROL IC
I2C BAS
OSD RGB
DATA,CLK
J2 MECHA PCB from
RSENCE
NJW1303V 7INCH TFT
to TV +5.0V
+14V (K,M) TYPE ESENCE MECHANISM IC702 LCD
GND ASSY 1H CCD IC200
(E) TYPE IC700
TV SYNC
IC201 EEP ROM SPOI
TR RGB SW RGBI
SYS GND IC501
TG V 5V IC500 RGBI
V GND u-COM BUFF
TB RGB SW OSD MOD1
OSD CK VSY VSY MOD2
V GND OSD DO
HSY VRSP
OSD CS NT/PAL
SC DATA SCLS
OSD TRE CLDS
SC REQ OSD RST
MC DATA to PIOCT
MC REQ u-COM to MECHANISM PCB
BP CLK IC402,403
SC CON RIM+ EXM+
RIM- EXM- BUFF SYNI
REMO VOL
RST IC4 IC3
OSCO
CVOP
IC401
OSCI
MOTOR MOTOR
VIN
TV L DRIVER DRIVER VOL
TV R
IC400 HD
RIM+ EXM+ SRC SYNC
KVT-M700
A GND VD
RIM- EXM- SEPARATION
HD,VD
to u-COM ATT
IC302
RST +13.0V
RST to AN2546FH-A IC202 PLL +5.0V +5.3V
FLIP FLOP -9.3V
IC20 CLK +5.0V IC201
to BAT IC301 OPEN A. DIM
u-COM A. DIMMER -10.9V
PARK ACC
ILL PARK RST
B.U. DET u-COM
ACC KEY1 KEY1 SW
BU ILLUMI
GND
REMO BRT INVERTER
BRT BL +9.0V CFL
20MHz
(X14- ) (B/2)
KVT-M700 (2/2) (E,K,M)
3
KVT-M700
COMPONENT DESCRIPTION
VIDEO CONTROL UNIT (X14-692x-xx)
REF.
FUNCTION OPERATION
No.
IC2 DC/DC CONVERTER CONTROLLER Controls DC/DC converter.
IC3,4 MOTOR DRIVER Drives TV mechanism motor.
IC101 ISOLATION AMPLIFIER Isolates TV input audio signal.
IC102 ISOLATION AMPLIFIER Isolates AV IN1 input audio signal.
IC103,104 AUDIO SW Switches audio signal.
IC105 ISOLATION AMPLIFIER Isolates AV IN2 input audio signal.
IC201 RGB SW Switches TV/NAVI signals (Only Euro model).
IC202 VIDEO SW Switches video signal to monitor.
IC203 VIDEO SW Switches video signal of AV OUT.
IC204 VIDEO SW Switches sync detection video signal.
IC205 SYNC SEPARATION Detects sync of NT/PAL and AV IN2.
IC301 PANEL u-COM Controls panel.
IC302 RESET IC Resets ICs.
IC303 REMOTE BUFFER Buffers navigation remote control signal.
IC501 REMOTE CONTROL SENSOR Senses remote control signal.
Q1 B.U. DETECTION Detects back-up.
Q2 PARKING DETECTION Detects parking signal.
Q3 B.U. 5V SW Switches back-up 5V by P.ON.
Q4-6 IC2 POWER SW Turns on or off IC2 power supply.
Q7 DC/DC SW Drives fry-back.
Q8 DC/DC SW Drives chopper.
Q9,10 Q8 DRIVER Drives Q8.
Q11,12 MOTOR DRIVER POWER SW Switches motor driver power supply.
Q13 MOTOR DRIVER VOLTAGE SW Switches motor driver power supply voltage.
Q14,15 8V AVR Supplies power to motor driver.
Q16,17 B.U. 5V AVR Supplies 5V to panel u-com.
Q101,102 AUDIO MUTE Mutes AV OUT audio signal.
Q103,104 AUDIO MUTE DRIVER Drives AV OUT audio mute.
Q201,202 VIDEO AMPLIFIER Amplifies video signal.
Q203 VIDEO BUFFER Buffers video signal.
Q204 IC203 POWER SW Turns on or off IC203 power supply.
Q301 SW Is turned on by panel reset key.
Q302 RESET CONTROL Is controlled by panel reset SW.
Q303 DSI SW Turns on or off DSI.
Q304,305 RED/GREEN SW Switches red and green.
Q306,307 DSI OSCILLATOR Oscillates DSI.
Q308 DSI BUFFER Buffers DSI.
Q309 KEY DETECTION Detects VOL DOWN key.
Q501 RED LED SW Turns on or off red LED.
Q502 BLUE LED SW Turns on or off blue LED.
Q503 GREEN LED SW Turns on or off green LED.
4
KVT-M700
COMPONENT DESCRIPTION
VIDEO CONTROL UNIT (X14-692x-xx)
REF.
FUNCTION OPERATION
No.
Q504 RED/GREEN SW Switches red and green LED.
Q505 RED/GREEN SW Turns on green LED.
Q506 RED/GREEN SW Turns on red LED.
Q507 GREEN LED SW Turns on or off green LED.
ELECTRIC UNIT (X25-926x-xx)
REF.
FUNCTION OPERATION
No.
IC1 POWER AMPLIFIER Controls DC/DC converter.
IC2 8V AVR Switches 8V.
IC3 DC/DC CONTROLLER Controls DC/DC converter.
IC4 MUTE LOGIC Mute logic.
IC5 ISOLATION AMPLIFIER Isolates AV IN2 audio signal.
IC6 RESET IC Detects 3.7V.
IC7 SYSTEM E's+ HPF.
IC8 OPERATION AMPLIFIER For PRE OUT.
IC9 SYSTEM u-COM Controls system.
IC10 OPERATION AMPLIFIER For PRE OUT.
IC11 E-VOLUME/MPX Electric volume and multiplexer.
IC12 OPERATION AMPLIFIER For PRE OUT.
IC13 AUDIO SW Switches main source audio signal.
IC14 BUFFER Buffers 1/2 Vcc and GND.
IC15 ISOLATION AMPLIFIER Isolates the 5-Line.
IC16 RDS DECODER Decodes RDS.
IC17 NOISE DETECTION OP AMP. Detects noise.
IC18 ISOLATION AMPLIFIER Isolates AV IN audio signal.
Q1 5V AVR Backs up 5V.
Q2 SVR SW Switches SVR.
Q3 5V AVR Backs up 5V.
Q4 P.ON 5V SW Switches 5V.
Q5,6 P.ON 14V SW Switches 14V.
Q7,8 DC/DC SW Switches DC/DC.
Q9 P.ANT SW Switches P.ANT.
Q10 P.CON SW Switches P.CON.
Q11 8V AVR Switches 8V.
Q12,13 P.CON PROTECTOR Protects P.CON.
Q14 P.ANT SW Switches P.ANT.
Q15 P.CON SW Switches P.CON.
Q16 B.U. DETECTOR Detects back-up.
5
KVT-M700
COMPONENT DESCRIPTION
ELECTRIC UNIT (X25-926x-xx)
REF.
FUNCTION OPERATION
No.
Q17 EXT.CON SW Switches extra control.
Q18 RESET SW Switches reset.
Q19-21 DIFFERENTIAL STABILISER Stabilises difference.
Q22 ACC DETECTOR Detects ACC.
Q23-25 DIFFERENTIAL STABILISER Stabilises difference.
Q26 MUTE SW Switches mute for Rch PRE OUT.
Q27 AUDIO MUTE Mute audio signal for PRE OUT.
Q28 MUTE SW Switches mute for Lch PRE OUT.
Q29 AUDIO MUTE Mute audio signal for PRE OUT.
Q30 MUTE SW Switches mute for IC7.
Q31,32 AUDIO MUTE Mute audio signal for PRE OUT.
Q33 NOISE DETECTION Detects noise.
Q34 AUDIO MUTE Mute audio signal for PRE OUT.
Q35 SOURCE SW Switches source.
Q36 AUDIO MUTE Mute audio signal for PRE OUT.
Q37 SOURCE SW Switches source.
Q38 AM+B SW Switches AM+B.
Q39 FM+B SW Switches FM+B.
Q40 AM+B SW Switches AM+B.
Q41 FM+B SW Switches FM+B.
Q42 RDS BUFFER Buffers RDS.
Q43-45 NOISE DETECTION For noise detection AFC.
VIDEO UNIT (X35-423x-xx)
REF.
FUNCTION OPERATION
No.
IC20 BRIGHTNESS SENSOR Senses brightness.
IC200 TIMING CONTROLLER Controls LCD.
IC201 PLL CONTROLLER Controls PLL.
IC202 D-FLIP FLOP Delays vertical starting position on screen.
IC301 OPERATION AMPLIFIER Drives and buffers V-COM AC.
IC400 SYNC SEPARATOR Separates sync burst gate pulse.
IC401 NAND NAND and inverts HD/VD.
IC402 HD/VSY/HD+VD BUFFER Buffers HD/VSY/HD+VD.
IC403 BGP/HD/VD BUFFER Buffers BGP/HD/VD.
IC500 ON-SCREEN DISPLAY CONTROLLER Controls on-screen display.
IC501 R/G/B/I/HSY BUFFER Buffers R/G/B/I/HSY.
For mechanism position, touch-panel and chroma
IC700 E2PROM
memory.
6
KVT-M700
COMPONENT DESCRIPTION
VIDEO UNIT (X35-423x-xx)
REF.
FUNCTION OPERATION
No.
IC701 VIDEO SIGNAL PROCESSOR Decodes chroma, controls gamma.
IC702 1H DELAY LINE For PAL chroma 1h delay.
IC703 3.0V AVR Regulates 3.0V.
Q10-14 TOUCH-PANEL CONTROL SW CONTROL SW for touch-panel.
Q200 VCO Oscillates PLL.
Q201,202 TV/NAVI SW Switches TV/NAVI.
Q300 +7.5V AVR Supplies +7.5V to gamma control circuit.
Q301 RIPPLE FILTER Ripple filter.
Q302,303 V-COM BUFFER Buffers V-COM.
Q401,403 C-SYNC BUFFER Buffers C-SYNC.
Q497,498 NTSC/PAL SW Switches NTSC and PAL.
Q500 I SIGNAL BUFFER Buffers I signal.
Q600-602 INVERTER SW Switches inverter.
Q603,604 INVERTER DRIVER Drives inverter.
Q700 BRIGHTNESS BUFFER Buffers brightness signal.
CHROMA TRAP CUT-OFF FREQUENCY
Q701 Switches chroma trap cut-off frequency.
SW
Q801-804 KEY ILLUMINATION SW Switches key illumination red and green.
7
KVT-M700
MICROCOMPUTER'S TERMINAL DESCRIPTION
(X25-) IC9 : SYSTEM u-COM
PORT
PORT NAME I/O FUNCTION OPERATING CONDITION
No.
1 CH-DATA-H O Changer data to head unit. -
2 CH-CLK I/O Changer clock data. -
3 AFS O AFS. "L" : AF searching / FM seeking. "H" : Receiving.
4 PLL-DATA I/O Front-end data. -
5 PLL-CLK I/O Front-end clock. -
6 EVDD - VDD. -
7 EVSS - VSS. -
8 - - - -
9 AM+B O AM power supply. "H" : AM+B on.
10 FM+B O FM power supply. "H" : FM+B on.
11 PRE-MUTE-R O Rch preout mute. -
12 PRE-MUTE-L O Lch preout mute. -
13 SDA I/O Buss data. -
14 SCL O Buss clock. -
15 - - - -
16 BEEP O Beep. -
17 - - - -
18 TEST - Test. -
19 P-MUTE O Power IC mute. "L" : Tell mute / Power off / All off.
20 P-STBY O Power IC stand-by. "L" : Power amplifier on. "H" : Power amplifier off.
21 MUTE O Mute. "L" : Mute off. "Open" : Mute on.
22 P-SVR O Power IC reset. "L" : Reset off. "H" : Reset on (Discharge).
23 BU-DET I Momentary power down detection. "L" : Power down detection.
24 ACC-DET I ACC detection. "L" : ACC detection.
25 - - - -
26 SW-5V O 5V switch. "L" : Switch on. "H" : Switch off.
27 EXT-AMP-CON O External amplifier control. "40ms" : Off. "70ms" : Low. "100ms" : Hi.
28 P.CON O Power control. "H" : Power on.
29 ANT.CON O Antenna control. "H" : Control on.
30 P.ON O Power on. "H" : Power on.
31 RESET I Reset. "L" : Reset.
32 XT1 I Sub clock oscillation. -
33 XT2 - Sub clock oscillation. -
34 REG-C I - -
35 X2 - System clock oscillation. -
36 X1 I System clock ocsillation. -
37 VSS - GND. -
38 VDD - Power supply. -
39-41 - - - -
42 TYPE 0 I Destination switch. -
43 TYPE 1 I Destination switch. -
44,45 - - - -
46 IC2 TYPE 0 I IC2 setting. "L" : Default.
47 IC2 TYPE 1 I IC2 setting. "L" : Default.
48 M-REQ-H O Request to monitor. "L" : Requesting.
49 - - - -
50 M-MUTE I Mute request from monitor. "H" : Mute on.
8
KVT-M700
MICROCOMPUTER'S TERMINAL DESCRIPTION
(X25-) IC9 : SYSTEM u-COM
PORT
PORT NAME I/O FUNCTION OPERATING CONDITION
No.
51 M-CON O Monitor control. "H" : Control on. "L" : Control off.
52-54 - - - -
55 B-VDD - Bus interface power supply. -
56 B-VSS - Bus interface GND. -
57-64 - - - -
65 CH-REQ-H O Request to the 5-line. "L" : Requesting.
66 CH-RST O 5-line reset. -
67 CH-MUTE I Mute request from the 5-line. "H" : Mute on.
68 CH-CON O 5-line control. "H" : Control on. "L" : Control off.
69 - - - -
70 AV-CONT O To AVREF. -
71 AVDD - A/D analogue power supply. -
72 AVSS - A/D analogue power supply. -
73 AVREF I A/D reference voltage. "H" : Voltage on.
74 PHONE I Phone detection. "NAVI" : Over 2.5V. "PHONE" : Less than 1V.
75-78 - - - -
79 NOISE I FM noise detection. -
80 S-METER I FM S-meter detection. -
81 R-DATA I RDS data. -
82 R-QUAL I RDS quality. "H" : Good quality.
83 IFC-OUT I IFC. -
84,85 - - - -
86 NOISE 2 I Noise amplifier. -
87 R-CLK I RDS clock. -
88 CH-REQ-C I Request from the 5-line. "L" : Requesting.
89 M-REQ-C I Request from monitor. "L" : Requesting.
90 - - - -
91 SEL1 O Selector. -
92 SEL2 O Selector. -
93 - - - -
94 FLASH -D 1 I 5-line data. -
95 FLASH-D 0 O 5-line data. -
96 FLASH-CLK I/O 5-line clock. -
97 M-DATA-C I Monitor inter face data. -
98 M-DATA-H O Monitor inter face data. -
99 M-CLK I/O Monitor inter face clock. -
100 CH-DATA-C I Changer data from changer. -
9
KVT-M700
MICROCOMPUTER'S TERMINAL DESCRIPTION
(X14-) IC301 : PANEL u-COM
PORT
PORT NAME I/O FUNCTION OPERATING CONDITION
No.
1 M-DATA-C O Unit - Receiver box data. -
2 M-CLK O Receiver box - Unit clock. -
3 OSD-CS O On-Screen Display chip selector. -
4 OSD-DO O On-Screen Display data. -
5 OSD-CK O On-Screen Display clock. -
6 EVDD - VDD. -
7 EVSS - GND. -
8 OSD-RST O On-Screen Display reset. -
9 OSD-TRE I On-Screen Display communication permission. -
PAL : 45Hz-55Hz. NTSC : 55Hz-65Hz.
10 V-SYNC I NTSC PAL/VD2 judgement vertical sync.
VD2 exists : 45Hz-65Hz.
"L" : LCD (50Hz/60Hz judgement).
11 SYNC-SW O LCD-SYNC / VD2-SYNC switch.
"H" : VD2 presence judgement
12 REMOTE I Remote signal. -
13 SDA I/O IC2 data. -
14 SCL I/O IC2 clock. -
15 DIMMER O Dimmer. -
16 HSY I Brightness control horizontal sync counter. -
17 - - - -
18 IC/VPP - VSS. -
19 - - - -
20 PARK-SW I Parking detection. "H" : Parking on.
21 EX-MP O Mechanism slide motor. -
22 EX-MN O Mechanism slide motor. -
23 RI-MP O Mechanism tilt motor. -
24 RI-MN O Mechanism tilt motor. -
25 P.ON O Power on. "L" : P.ON.
26 MEC-P.ON O Mechanism power supply. "H" : P.ON.
27 MOT-SW O Tilt/Slide motor voltage. "H" : 5.0V. "L" : 7.5V.
28-30 - - - -
31 RESET I Reset. "L" : Reset.
32 XT1 I - -
33 - - - -
34 REG-C I - -
35 X2 - System clock (20MHz). -
36 X1 I System clock (20MHz). -
37 VSS - GND. -
38 VDD - BU5V. -
39 - - - -
40 AB-MUTE O B-box audio mute. "H" : Mute on. "L" : Mute off.
41 VI-1 O LCD VIDEO selector 1. -
42 VI-2 O LCD VIDEO selector 2. -
43 VI-3 O LCD VIDEO selector 3. -
44 VO-1 O AV-OUT VIDEO selector 1. -
45 VO-2 O AV-OUT VIDEO selector 2. -
46 AD-1 O AV-OUT AUDIO selector 1. -
47 AD-2 O AV-OUT AUDIO selector 2. -
48 AB-1 O B-BOX AUDIO selector 1. -
49 AB-2 O B-BOX AUDIO selector 2. -
50 AD-MUTE O AV-OUT AUDIO mute. "H" : Mute on. "L" : Mute off.
10
KVT-M700
MICROCOMPUTER'S TERMINAL DESCRIPTION
(X14-) IC301 : PANEL u-COM
PORT
PORT NAME I/O FUNCTION OPERATING CONDITION
No.
51 LED-R O Red SRC key illumination. "H" : Illumination on. "L" : Illumination off.
52 LED-G O Green SRC key illumination. "H" : Illumination on. "L" : Illumination off.
53 LED-B O Blue SRC key illumination. "H" : Illumination on. "L" : Illumination off.
54 RED/GRN O Key illumination RED/GREEN switch. "H" : LED. "L" : GREEN.
55 BVDD - VDD. -
56 BVSS - GND. -
57 TP-X0 O Touch-panel X-axis mode 0. -
58 TP-X1 O Touch-panel X-axis mode 1. -
59 TP-Y0 O Touch-panel Y-axis mode 0. -
60 NT/PAL O NTSC/PAL judgement. "H" : PAL. "L" : NTSC.
61 V-MUTE O LCD video mute. "H" : Video mute on. "L" : Video mute off.
62 RGB-SW O NAVI-VIDEO / TV-VIDEO switch. "H" : NAVI interface. "L" : Others.
63 MDN O Wide mode setting 1. -
64 MDW O Wide mode setting 2. -
65 MDS O Wide mode setting 3. -
66 LED-IND O DSI on/off. "H" : DSI off. "L" : DSI on.
67 SC-CON O TV-box power control. -
68 MC-REQ O Unit - TV tuner box communication request. -
69 M-REQ-C O Unit - Receiver box communication request. -
70 REF-CON O AVREF. "H" : A/D reference voltage on.
71 AVDD - VDD -
72 AVSS - VSS. -
73 AVREF I AVREF. -
74 E-SENS I Mechanism slide position. -
75 R-SENS I Mechanism tilt position. -
76 TP-XDT I Touch-panel X-axis voltage. -
77 TP-YDT I Touch-panel Y-axis voltage. -
78 KEY-1 I Ladder-like key. -
79 KEY-2 I Ladder-like key. -
80 MEC-SW I Mechanism connection detection. "L" : Mechanism exists.
81 OPT-SENS I Optical sensor DC. -
82 - - - -
83 TYPE 0 I Destination switch 0. -
84 TYPE 1 I Destination switch 1. -
85 - - - -
86 VOL-DWN I VOLUME DOWN key. -
87 OPN/CLS I OPEN/CLOSE key. -
88 SRC I SRC key. -
89 M-CON I Receiver box power control. -
90 BU-DET I Momentary power-down detection. "H" : Power down.
91 M-REQ-H I Receiver box - Unit communication unit. -
92 PWN-IN