Service Mode, English - b&o BeoVision 1 Manual De Reparacion Y Servicios

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Service mode, English

IIC bus error
IC
1IC100 TDA9321H Colour decoder & IF (HIP)
1TU50 V1516DC TV tuner
1IC500 SDA5275-2 Teletext
20TU01 SF1218C Satellite tuner
20IC05 PIC16C62 DiSeq FEP
20IC50 TDA8745 Satellite sound receiver
4IC600 PCF8574 Port expander (power/defl.)
1IC550 MSP3410D Sound processor
1IC751 PCF8574 Port expander
61IC3 80C652 STB Controller
1IC350 TDA9330H Video processor (HOP)
1IC300 TDA9178 CTI
On modes:
Data failure
Megatext deadlock
Megatext reset failure
Megatext CRC failure
Power on reset failure 1
Power on reset failure 2
Power down detected failure
DiSEqC power failure
Transmission impossible
Data link tied down
Calibration error too few positions
Calibration error too many positions
An IIC bus error means that the communication on the bus fails when the
microcomputer tries to communicate with the address in question.
In most cases this means that the addressed IC is defective but the defect
could also be in one of the components surrounding the IC or in other
components on the bus. Adresses in connection with IIC bus errors:
Function On
modes
AV
V
V
AV
AV
AV
V
AV
SAV
AV
V
V
S - Standby mode
A - Audio mode
V - Video mode
If an error occurs in the EEPROM (6IC6) that prevents output of geometry
data to the TV set, the microcomputer will replace the missing data with
default data stored in the EPROM (6IC3).
Errors on the data communication with teletext, 1IC500 (SDA5275-2),
IC500 do not answer within the specified time when the TV is switched on.
The TV will go into stand-by.
Reset failure of teletext, 1IC500 (SDA5275-2), during start up. The TV will
go into stand-by.
Errors on the data communication with teletext, 1IC500 (SDA5275-2),
during start up reset. The TV will go into stand-by.
Reset or update failure of 1IC100 (TDA9321H) during start up.
Reset or update failure of 1IC350 (TDA9330H) during start up.
Power down failure detected 1IC300 (TDA9178).
As Vtune and 14V/18V on the satellite PCB are not short circuit protected,
20IC05 (PIC16C62) detects overload on Vtune and 14V/18V.
It is not possible to send data to pin 8 on the V.TAPE or AV socket, probably
because of noise.
The data link connection to pin 8 on the V.TAPE or AV socket is short
circuited to ground.
Not enough positions are read during Stand calibration. The Stand may
be blocked.
Too many positions are read during Stand calibration.
Adr Clock IIC1 IIC-2A IIC-2B IIC-2C IIC-2D
8A 100 X
C0 kHz X
22 400 kHz
C6/C4 100
48 kHz
D4
4E
80 100
40 kHz
68
8C 400
40 kHz
X
X
X
X
X
X
X
X
X
X