Service Adjustments (Electronic Controls) - Panasonic CT-27E13G Service Manual

NAME DESCRIPTION CT-27E13G CT-27E33G CT-32E13G CT-32E33G CT-36E13G CT-36E33G
ID1* ID SWITCH 1
ID2* ID SWITCH 2
ID3* ID SWITCH 3
IMPORTANT:
These table values are approximated and could change due to
variation of electrical characteristics in each set, except for the ID
switch values.
*Note:
The correspondent ID switch (ID1,ID2, ID3) data configuration
should not be modified in any way. If EEPROM circuit needs to be
replaced, these ID values should be configured according with this
table.

13. Service adjustments (electronic controls)

NOTE
Please correlate with available pattern on all adjustments
13.1. Sub-Brightness and Contrast / Service DAC adjustment
(BRIGH, CONT)
Adjustment of this control is important for setting proper operation of customer brightness and
picture controls. Do not adjust the SCREEN VR after the sub-brightness is set.
This adjustment is factory set. Do not adjust unless repairs are made to associated circuit, the
CRT Board or when the CRT is replaced.
Preparation
1. Apply a colorbar pattern.
2. Set the PICTURE control to the maximum.
3. Set COLOR control to minimum (no color on picture).
4. Set the BRIGHTNESS control to the center.
5. Set the SHARPNESS control to the center.
6. Connect the oscilloscope to TP35 (or TP47G).
Procedure
1. In the service mode, select DAC for brightness adjustment
F8 FB
0F 0F
77 77
26
F8 FB
4F 4F
77 77
FC FF
4F 4F
77 77