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Service Hints
Hotel Mode
Purpose
1. At Hotels, this Mode prevent customer from changing the TV preset data, such as Channel preset data.
Note : This Mode is useful for hotel, you should not get into " Hotel Mode" with Normal use.
Operation
1. To get into " Hotel Mode ", press the remote control " Recall [
] " button and Channel up" [ ] " key on the TV set simul-
taneously, after setting the " Off-Timer [
] " mode.
2. In this mode, The Channel up and down Function will be able as normal Mode, and The maximum volume level for this
mode is set at the current volume level, that means setting at the level before entering the mode.
However, other function will be disable.
However, other function will be disable.
3. To exit This mode, press the remote control " Off-Timer [
] " button and the " Volume Down [ - ] " key simultaneously.
The I
2
C Bus Concept:
A. Features
1. The I
2
C bus is a 2-wire serial bus consisting of a clock line (SCL) and a data line (SDA).
2. It allows bi-directional data transfer, between IC’s.
3. It consists of master and one or more slave IC’s.
-The master initiates transfer and generates clock signals.
-The slave is the IC addressed by a master.
-The slave is the IC addressed by a master.
B.I
2
C Application in the MX-8 Chassis.
During transfer the microcomputer IC1101 in the TV set is always the master device. IC601 and IC1102 are slave addressed by
IC1101.
IC1101.
1. Various control functions are possible via the I
2
C bus from the microcomputer IC1101 to VCJ IC601, as shown in Fig.1.
2. Date like position, BT voltage, band, AFC, skip, volume, recall, power and off timer setting, service mode setting, colour set-
ting, function etc, are stored and read out from the EEPROM IC1102 via the I
2
C bus.
Ref.No.
SCL
SDA
Location
Function
IC1102
6pin
5pin
A-Board
MEMORY (EEPROM)
IC1101
38pin
37pin
A-Board
MASTER (MICON)
TNR001
SCL
SDA
A-Board
TUNER
IC601
9pin
10pin
A-Board
VIDEO CHROMA JUNGLE (VCJ)
IC401
2pin
1pin
A-Board
PINCUSHION
IC5501
64pin
1pin
H-Board
VIDEO SIGNAL PROCESS
IC3001
20pin
21pin
H-Board
AV SELECT
IC2101
4pin
5pin
H-Board
AV STEREO
IC2102
16pin
17pin
H-Board
QUADRUPLE STEREO
SDA
SCL
SCL
MASTER
(IC1101)
(IC1102) MEMORY
Fig.1
(IC1102)
VCJ/SIF/VIF
SDA
SCL
SCL
SDA
SCL
SCL
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