Sony TRINITRON KV-E2911D - Section 4 Circuit Adjustments; A Board Adjustments

| KV-E2511D
SECTION 4 BM 088
CIRCUIT ADJUSTMENTS
4-1 A BOARD ADJUSTMENTS [BELL FILTER ADJUSTMRNT (L336)
1, Input a SECAM color bar signal.
2. Connect the oscilloscope to the emitter of Q335,
3. Adjust L336 so that the waveform is flat.
TU101
Ce
RV1 @
TUNER AGC ADJ
<Before Adjustment> <After Adjustment>
DISCRIMINATION ADJUSTMENT (RV331 and L331) |
. Input a SECAM color bar signal.
2. Connect the oscilloscope to Pin @ of IC331,
3. Adjust RV331 so that the white and black sections
of the wave form at Pin @ come to the O level.
4, Connect the oscilloscope to Pin @ of IC33]1,
. Adjust L331 so that the white and black sections of
TUNER AGC ADJUSTMENT (VIF101 RV1) | the wave form at Pin @ come to the O level,
1, Align with an appropriate signal between stations.
(COMPONENT SIDE)
2. Adjust RV1 so that snow noise and cross modulation
just disappear from the picture,
0 level
4-2, B BOARD ADJUSTMENTS {
hit t black t (white and black levels
Aivhiteh pact) -oRelneks pan) should become 0 level)
A RV331
SECAM DISCRI ADJ ane
(Q|Ls31 BELL FILTER
ADJ
(Before Adjustment) (After adjustment)
CT331 CT332
REF OSC
ADJ
4-3. V BOARD ADJUSTMENTS
CT01
(COMPONENT SIDE)
REFERENCE OSCILLATOR ADJUSTMENT (CT832
8.8 MHz)
RV01
@
1, Input a PAL color bar signal. R.G.B. LEVEL ADJ
: Ground Pin @ of IC331,
Adjust CT332 to obtain synchronization,
REFERENCE OSCILLATOR ADJUSTMENT (CT331
7.16 MHz)
(COMPONENT SIDE)
1, Remove the V-1 connector,
2, Put the system into Text mode.
3. Adjust CTO1 so that the picture does not move,
1. Input an NTSC color bar signal.
2. Ground Pin @ of 1C331, RGB LEVEL ADJUSTMENT (RVO1)
3. Adjust CT331 to obtain synchronization. 1, Maximize the picture setting,
4. Remove the justper grounding Pin @ of IC331,. 2. Adjust RVO1 so that RGB output is 0.75V