Sony TRINITRON KV-21PM2 - Focus; Screen (G2) and White Balance; Setting the Service Adjustment Mode; White Balance Adjustments

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
(3) Screen-corner Convergence
Affix a permalloy assembly corresponding to
3-3. FOCUS _
2. A djust FOCUS control for best picture.
3-4. SCREEN (G2)
1. Input a dots pattern.
2. Set the PICTURE and BRIGHT controls at minimum
and COLOR control at normal.
3. Adjust SBRT, GCUT, BCUT in service mode so that
voltages on the red, green, and blue cathodes are
170Vdc with an oscilloscope as shown in Fig. 11.
4. Observe the screen and adjust SCREEN (G2)VR to
obtain the faintly visible background of dot signal.
t T
170Vdc pedestal
GND ----
3-5. METHOD OF SETTING THE SERVICE
ADJUSTMENT MODE
SERVICE MODE PROCEDURE
1. Standby mode. (Power off)
2. IDISPLAYI — @ |VOL(+)l -* IPOWERI on the
Remote Commander. (Press each button within a
second.)
SERVICE ADJUSTMENT MODE IN
Disp Item
(Item) data
-A-V,
SERVICE SYS 0
3. The CRT displays the item being adjusted.
4. Press [T) or g] on the Remote Commander to
select the item.
5. Press [3] or [§] on the Remote Commander to
change the data.
6. Press IMUTINGI then jENTER] to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
[MtJTINCil Green
i
[ENTER! Red
7. T urn set off and on to exit.
3-6. WHITE BALANCE A DJUSTMENTS
1. Input an entire white signal.
2. Set to Service adjustment Mode.
3. Set the PICTURE and BRIGHT to minimum.
4. Adjust with SBRT if necessary.
5. Select GCUT and BCUT with [T| and g] .
6. Adjust with and [6) for the best white balance.
7. Set the PICTURE and BRIGHT to maximum.
8. Select GDRV and BDRV with \T\ and g].
9. Adjust with [3] and [6] for the best white balance.
10. Write into the memory by pressing [MUT INGl then
[ENTER; •
SERVICE WRITE
Fig.11
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