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ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: "CBA" is abbreviation for
"Circuit Board Assembly."
Note: Electrical adjustments are required after
replacing circuit components and certain
mechanical parts. It is important to perform
these adjustments only after all repairs and
replacements have been completed.
Also, do not attempt these adjustments unless
the proper equipment is available.
Test Equipment Required
1. NTSC Pattern Generator (Color Bar W/White
Window, Red Color, Dot Pattern, Gray Scale,
Monoscope, Multi-Burst)
2. AC Milli Voltmeter (RMS)
3. Alignment Tape (FL8A, FL8N), Blank Tape
4. DC Voltmeter
5. Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50 V/Div,
F-Range: DC~AC-60 MHz
6. Frequency Counter
7. Plastic Tip Driver
How to make service remote control
unit:
1. Prepare remote control unit. (Part No. N0107UD
or N0150UD) Remove 3 screws from the back lid.
(Fig. 1-1)
Screws
Remote control unit (bottom)
2. Remote control unit: Part No. N0107UD
Add J1 (Jumper Wire) to the remote control CBA.
(Fig. 1-2)
Remote Control CBA
Remote control unit: Part No. N0150UD
Cut off pin 10 of the remote control
microprocessor and short circuit pins 10 and 17 of
the microprocessor with a jumper wire.
Note: The remote control with the unit cannot be
used as service remote control unit.
How to Enter the Service mode:
Service mode:
1. Use the service remote control unit.
2. Turn the power on.
3. Press [WAKE-UP/SLEEP] button on the service
remote control unit.
1. DC 105V (+B) Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
unit does not operate correctly.
Test Point
D613
Cathode(+B)
C613(-)(GND)
Tape
---
Note: D613 Cathode(+B), C613(-)(GND),
VR601 --- Main CBA
1. Connect the unit to AC Power Outlet.
2. Connect DC Volt Meter to D613 Cathode(+B) and
C613(-)(GND).
3. Adjust VR601 so that the voltage of D613
Cathode(+B) becomes +105±0.5 V DC.
2. Initial Setting
General
Fig. 1-1
1. Enter the Service mode. (See page 1-6-1.)
2. Press [VOL p] button on the service remote
control unit. Display changes "C/D," "7F," "FM,"
"ACCESS CODE," "9V," and "RC5" cyclically when
[VOL p] button is pressed.
3. To set each data value shown below, press [CH o
/ p] buttons on the service remote control unit.
7F --- Set to "FF."
FM --- Set to "OFF."
ACCESS CODE --- Set to "ON."
Fig. 1-2
9V --- Set to "OFF."
RC5 --- Set to "OFF."
Note: C/D data value does not need to be adjusted
at this moment.
1-6-1
Adj. Point
Mode
VR601
---
M. EQ.
Spec.
DC Voltmeter
+105±0.5 V DC
Plastic Tip Driver
Input
---
T5517EA
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