Teac CTM6828S Manual de usuario

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SERVICE MANUAL

Version 2-68 cm CTV

Effective: MAY 2000 CTM6828V2SERV

TECHNICAL BULLETIN 26-Jun-00

Page 1of 1

MODEL: CT-M5930S, CT-M6828S, CT-F683

PROBLEM:

RF Interference

File: CTM5830 6828 683 rf interf tb.doc

Some units of the first production lot for the models of reference have been supplied with a low quality RF lead

from the RF connector in the back panel to the tuner input. Those units may display diagonal interference lines

on the picture mainly in VHF bands.

Note that the braid of the good quality cable is very tight and totally covers the internal wire.

Instructions

Replaced the faulty RF cable assembly using the part number 40252200111.

Regards,

Alcides Berta

TEAC Australia Pty Ltd.

TECHNICAL BULLETIN 12-July-2000

Page 1of 1

MODEL: CT-F683, CT-M6828S, CT-M5930

PROBLEM:

I2C Mitsubishi chassis. Service Mode adjustments

File: CT-F683 CT-M6828 5930 RC tb.doc

The following information applies to all Great Wall models using I2C Mitsubishi technology. A

special type of remote control is necessary to access Service Mode adjustments, please refer to

the figure.

Accessing Service Mode

1-Press first button on the left of the FACTORY ON row (Button 1). The

word Key is visible on the screen.

2-Press FACTORY button (Button 2). The first page of factory

adjustments will be displayed.

3-Navigate between parameters and different pages using UP and DOWN

buttons. Direct access to frequently used parameters is available from

dedicated buttons, for example EW WIDTH, V AMPL, etc.

4-Adjust parameter values using VALUE+ and VALUE -.

Leaving Service Mode

1-Press first button on the left of the FACTORY ON row (Button 1). The

work Key is visible on the screen.

2-Press STANDBY button.

3-Turn POWER off from the front panel switch for at least 15 seconds.

Note:

The final version of remote control may be slightly different from the one used

to prepare this bulletin.

Regards,

Alcides Berta

TEAC Australia Pty Ltd.

TECHNICAL BULLETIN 21-Jul-2000

Page 1of 1

MODEL: CT-M6828S CT-F683 CT-M5930S

PROBLEM:

Audio noise

File: CT M6828S M5930S F683 noise tb.doc

A humming noise is audible at low volume from the speakers and particularly from the headphone

output (when available). The source of this noise is the vertical deflection circuit.

Instructions

1-Delete the jumper W286 on the main PCB next to CN111 in the fly-back transformer area.

2-Add a cable between the IF shielding can and the heat sink for the audio output IC.

Regards,

Alcides Berta

TEAC Australia Pty Ltd.

TECHNICAL BULLETIN 11-August-2000

Page 1of 1

MODEL: CT-M6828S, CT-M5930 and CT-F683

PROBLEM: Incorrect resistor type

File: CT-M6828S m oxide.doc

An incorrect resistor type has been fitted in position R504 of the neck board in some units. A

carbon film resistor having a light brown color body and mounted on the surface of the PCB can

eventually ignite and burn the board.

Instructions

Replace the carbon film resistor in location R504 with a metal oxide type. Separate the new

resistor from the surface of the PCB by approximately 10 mm.

Alcides Berta

TEAC Australia Pty Ltd.

Wrong type

Carbon film resistor

PN: 11347020512

47 Ohm, ½ W

Correct type

Metal oxide resistor

PN: 11347020575

47 Ohm, ½ W