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Service Mode (Electronic Controls)

This Receiver has electronic technology using the I²C

Bus Concept. It performs as a control function and it

replaces many mechanical controls. Instead of

adjusting mechanical controls individually, many of the

control functions are now performed by using "On

Screen Display Menu". (The Service Adjustment

Mode.)

Note: It is suggested that the technician reads all the

way through and understand the following

procedure for Entering/Exiting the Service

Adjustment Mode; then proceed with the

instructions working with the Receiver. When

becoming familiar with the procedure, the Flow

Chart for Service Mode may be used as a

quick guide.

Quick Entry to Service Mode:

At times when minor adjustments need to be done to

the electronic controls, the method of Entering the

service Mode without removal of the cabinet back is as

follows using the Remote Control:

1. Adjust VOLUME to minimum (0).

2. Set CC Mode (Close Caption) OFF.

3. Select SET-UP icon and select CABLE mode.

4. Select TIMER icon and set SLEEP time for 30, 60

or 90 Min.

5. Press ACTION button twice to exit menus.

6. Tune to the Channel 124.

7. Press the VOL

button (decrease) on Receiver.

Red "CHK" appears in the left upper corner.

To toggle between Aging and Service

modes:

While the "CHK" is displayed on the left top corner of

the CRT, pressing the Action and the Volume Up

buttons on the Receiver simultaneously will toggle

between the modes. Red "CHK" for Service and

yellow "CHK" for Aging.

Note: Three additional indicators appear on screen.

One is the five digit usage in hours and the

other two are four digits for V-Chip Main and

Child ratings. Indicators are hexadecimal

numbers.

8. Press the Power Button on the Remote Control

to select one of six Service Adjustment Modes.

B= Service VCJ SUB-DATA adjustments.

C= Service VCJ CUT-OFF adjustments.

P= Service VCJ adjustments.

S= Service OPTIONS (PICTURE) adjustments.

X = Service AFC adjustments.

"CHK" = Normal operation of CHANNEL

VOLUME

An address Menu appears in the right

hand corner of the screen

Figure 14. Service Mode Menu Adjustments.

Note: Only the applicable settings for the Receiver

serviced will be available (See a in Fig. 14).

Exiting the Service Mode:

Press the Action and the Power buttons on the

Receiver simultaneously for at least 2 seconds.

THE RECEIVER EXITS SERVICE MODE

The Receiver momentarily shuts off; then comes back

on tuned to channel 3 with a preset level of sound.

Any programmed channels, channels caption data and

some others user defined settings will be erased.

Always Exit the Service Mode

Following Adjustments.

and

- 14 -

B 00 33

C 00 0 255

IMPORTANT