Models Chassis
CT-32SX31E BP371
CT-32SX31UE BP371
CT-32SX31CE BP371
CT-36SX31E BP372
CT-36SX31UE BP372
CT-36SX31CE BP372
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.)
[it is suggested that the technician reads all the way through and understand the following procedure for Entering/Exiting the Serviceman Adjustment Mode]
CT-32SX31E BP371
CT-32SX31UE BP371
CT-32SX31CE BP371
CT-36SX31E BP372
CT-36SX31UE BP372
CT-36SX31CE BP372
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.)
[it is suggested that the technician reads all the way through and understand the following procedure for Entering/Exiting the Serviceman Adjustment Mode]
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)
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.
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.
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 ◄►
( Only the applicable settings for the receiver serviced will be available)
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.
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.
Note:
Always Exit the serviceman mode following adjustments.
Press
the Power Button on the Remote Control to select the Serviceman Adjustment.
1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments.
Note: Write Down the original value set for each address before modifying anything. It is easy to erroneously adjust the wrong item.
2.Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment.
Click on the pictures to magnify
For
Adjustments
1.Press
Channel Up/Down on the Remote Control to select one of the available Service
Adjustments. Write Down the original
value set for each address before modifying anything. It is easy to erroneously adjust the wrong item.
2.Press
Volume Up/Down on the Remote Control to adjust the level of the selected
Service Adjustment.
1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments. Write Down the original value set for each address before modifying anything. It is easy to erroneously adjust the wrong item.
Follow the above instructions before select and adjust each available item shown below.
To Check the Purity
Press the Recall Button on the Remote Control when in Serviceman Mode (red “CHK” is displayed) to enter the Purity Field Check Mode.
Chassis Service Adjustment Procedures
All service adjustments are factory preset and should not require adjustment unless controls and/or associated components are replaced.
Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol ▼is used. Otherwise, use COLD ground (Gnd ) — Tuner shield.
MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (TP8 to COLD GND)
140.0V B+ Voltage Confirmation
1. Set the Bright and the Picture to Minimum by using the Picture Menu.
2. Connect the DVM between TPP17 (+ side) and cold ground ( ).
3. Confirm that B+ voltage is 140.0V ± 1.5V. This voltage supplies B+ to the Horizontal Output & Flyback circuits.
