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Serviceman 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 Serviceman Adjustment Mode.)
Note: It is suggested that the technician reads all the way through and understand the following procedure for
Entering/Exiting the Serviceman Adjustment Mode; then proceed with the instructions working with the
Receiver. When becoming familiar with the procedure, the Flow Chart for Serviceman Mode may be used
as a quick guide.
Quick Entry to Serviceman Mode:
At times when minor adjustments need to be done to the electronic controls, the method of Entering the
serviceman Mode without removal of the cabinet back is as follows using the Remote Control:
1. Select SET-UP icon and select CABLE mode.
2. Select TIMER icon and set SLEEP time for 30 Min.
3. Press ACTION button 3 times to exit menus.
4. Tune to the Channel 124.
5. Adjust VOLUME to minimum (0).
6. Press the VOL button (decrease) on Receiver. Red “CHK” appears in upper corner.
7. Press the Power Button on the Remote Control to select one of the Serviceman Adjustment Modes.
1) B= Serviceman VCJ SUB-DATA ADJUSTEMENT.
2) C= Serviceman VCJ CUT-OFF ADJUSTMENT.
3) D= Serviceman GEOMETRY ADJUSTMENT.
4) M= Serviceman MTS ADJUSTMENTS.
5) P= Serviceman PIP ADJUSTMENT.
6) S= Serviceman S OPTION ADJUSTMENTS.
7) X = Serviceman X OPTION ADJUSTMENT.
8) E = Serviceman E OPTION ADJUSTMENTS
9) “CHK” = Normal operation of CHANNEL and VOLUME .
Exiting the Serviceman Mode:
Press the Action and the Power buttons on the Receiver simultaneously for at least 2 seconds.
THE RECEIVER EXITS SERVICEMAN 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.
To toggle between Aging and Serviceman 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 Serviceman and yellow “CHK” for
Aging.
An address Menu appears in the right
hand corner of the screen
32 B 0 2 215 C 0
b
a
b
a
Note: Only the applicable settings for
the Receiver serviced will be
available (See
a
in Fig. 20).
Figure 20. Serviceman Mode Menu Adjustments.
IMPORTANT NOTE:
Always Exit the Serviceman Mode
Following Adjustments.