A Board Adjustment - Sony TRINITRON KV-27EXR20 Service Manual

KV-27EXR20/27EXR25
RM-Y103__- RM-Y104
KV-27EXR20/27EXR25 ~
RM-Y103___ RM-Y104
3. AN ITEM OF ADJUSTMENT
ITEM REFERENCE
DATA
4. METHOD OF CANCELLATION FROM SERVICE
MODE
Set the standby condition (Press button on
the commander) _ in the next place, press[POWER|
NAME REGIST
H-FREQUENCE 1
V-FREQUENCE 1
adjusted.
SET TO SERVICE MODE
IC 102(PCD 8582) IC 101(M 37100 M 8)
EXCHANGE EXCHANGE
ADJUSTMENT ADJUSTMENT ~
ALL SERVICE LIST (PWM OUT)
WRITE THE MEMORY
TURN THE POWER SWITCH OFF.
CANCEL THE SERVICE MODE
NOTE: If service mode is canceled before writing into memory,
the adjustment data is not recorded.
Please write into memory, after adjustment.
ey
7. ADJUSTMENT WHEN REPLACING IC
1)
IC 251(CXA 1246 S)
EXCHANGE
ADJUSTMENT
AP(MPX-RVOL)
IC 301(CXA 1313 S)
EXCHANGE
ADJUSTMENT VP
(HFRE-RGBP,
VSHO-ABLM)
2) The following initial setting should always be per-
formed when replacing the IC 102 (PCD 8582).
ITEM | NAME REGISTER ADJUSTMENT
t=)
FOrFRFrRFrFEeRYRENO
*Please with the memory each items by pressing
MUTING}~— and then press|ENTER].
5-2. ABOARD ADJUSTMENTS
A BOARD
-component side-
1) Input a color-bar signal.
2) Adjust AGC VR of IF 201 so that snow noise and
cross-modulation disappear from the picture.
3) Confirm them at every channel.
H.FREQUENCY ADJUSTMENT (HFRE)|
1) Set to Service Mode.
2) Input a color-bar signal.
3) Connect a frequency counter to base of Q 501.
4) Call the item of AFC, set to 3 level (free run).
5) Select HFRE with[1]and[4].
6) Adjut[3]and|[6]to the 15735+ 60 Hz level.
7) Call the item of AFC again, adjust the level 00".
8) Write into the memory by pressing =f
then [ENTER].
V.FREQUENCY ADJUSTMENT (VFRE
1) Set the Service Mode.
2) Input an off-air signal (VIDEO IN — no signal).
3) Connect the frequency counter across connector
V.DY+ of A-52 connector and ground.
4) Select VFRE with[1]and{4].
5) Adjust B]and|[6|to the 56 +0.5 Hz. >
6) Write the memory by pressing — then
1) Set to Service Mode.
2) Input a color-bar signal.
3) Select NOTCH (VIDEO condition), turn ON by
press-ing [+] . And then set the COLOR VR to
maximum set-ting position and SHARPNESS
control to center.
4) Connect an oscilloscope to pin @ of A-32
connector and ground.
5) Select CROM with [1] and (4], and then adjust 3.58
MHz (CHROMA) ingredient is minimum with
and(6].
6) Write into the memory by pressing >
then [ENTER].
7) Set NOTCH to OFF, and make normal condition
with| VIDEO] — then [RESET] .