Sony TRINITRON KV-21PM2 User manual

SERVICE MANUAL BA-3 chassis
MODEL
KV-21PM2
COMMANDER
RM-Y146
DE$T r
MX
CHASSIS NU.
SCC-J95G-A
KV-21PS2
RM-Y145
MX
SCC-J95H-A
KV-21R22
RM-Y146
E
SCC-J94Q-A
KV-21R22C
RM-Y146
E
SCC-J94M-A
KV-21RD2
RM-Y146
E
SCC-J94R-A
KV-21RS22C
RM-Y145
E
SCC-J94L-A
KV-21RS50
RM-Y145
E
SCC-J94P-A
KV-21RS50C
RM-Y145
E
SCC-J94N-A
KV-21SD2
RM-Y145
E
SCC-J94S-A

SPECIFICATIONS
FOR ALL MODELS (except as noted)
Television system
Channel coverage
Antenna
Picture tube
Power requirements
Supplied accessories
American TV standard
VHF: 2-13
UHF: 14-69
CATV: 1-125
75£2, external antenna terminal
for VHF/UHF
Trinitron® tube
21-inch tube measured diagonally
120V, 60 Hz
220V, 50/60 Hz (KV-21R22C/
21RS22C/21RS50C only)
Size AA (R6) batteries (2)
Remote control RM-Y145 (1)
(KV- 21PS2/21RS22C/21RS50/
21RS50C/21SD2)
Remote control RM-Y 146 (1)
(KV-21PM2/21R22/21R22C/
21RD2)
Antenna dipole (1)
Antenna connector (1)
KV-21PM2/21R22/21R22C/21RD2
Output
Speaker output
Power consumption
Dimensions
(W/H/D)
Video (phono jacks): 1 Vp-p, 75£2
unbalanced negative sync
Audio (phono jacks)
500 mVrms (100% modulation)
Impedence: 47Q
A/V input (rear)
Headphone jack
1 speaker 2W (8Q)
90W when in use
6W in standby
8W in standby (KV-21R22C only)
522 x 477 x 471.7 mm
(20* 2 x 18 3 4 x 18 12 in.)
21.3 kg (46 lbs. 13 oz)
KV-21 PS2/21RS22C/21RS50/21RS50C/21SD2
put Video (phono jacks): 1 Vp-p, 75£2
unbalanced negative sync
Audio (phono jacks)
500mVrms (100% modulation)
Impedence: 47Q
A/V input (rear)
Output
Speaker output
Power consumption
Dimensions
(W/H/D)
Headphone jack
Audio out (KV-21RS50/21RS50C)
More than 800mVrms at max.
volume setting (variable)
More than 800mVrms (fix)
Impedence: 5K£2
2 speakers (2Wx2) 8£2
(KV-21PS2/ 21RS22C/21SD2 only,
2 speakers (3Wx2) 4£2
(KV-21RS50/21RS50C only)
90W when in use
7W in standby
8W in standby (KV-21RS22C/2IRS50C only)
522 x 477 x 471.7 mm (20 ,;2 x I8 y4 x 18 ,/2 in.)
(KV-21PS2/21RS22C/21SD2)
550 x464 x468.8 mm (21* 3 xl8 l/4 x 18‘ 2 in.)
(KV-21RS50/21RS50C only)
21.4 kg (47 lbs) (KV-21PS2/2IRS22C/21SD2)
23.4 kg (51 lbs, 8 oz) (KV-21RS50/21RS50C)
Design and specifications are subject to change without notice.
— 2 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
TABLE OF CONTENTS
Seci ion Title Page
1. GENERAL
Connecting the TV. 4
Using the Remote Control. 4
Setting Up Channels. 5
Watching the TV. 5
Using the Video Menu. 6
Additional Features. 6
Selecting Stereo or Bilingual Program(MTS). 6
Turning on Surround Sound. 7
Adjusting Treble, Bass and Balance. 7
Selecting a Caption Vision Option. 7
Customizing the Channel Number Buttons. 7
2. DISASSEMBLY
2-1. Rear Cover Removal. 8
2-2. A Board Removal. 8
2-3. Service Position. 8
2- 4. Picture Tube Removal. 9
3. SET-UP ADJUSTMENTS
3- 1 . Beam Landing. 10
3-2. Convergence. 11
3-3. Focus. 12
3-4. Screen (G2). 12
3-5. Method of Setting the Service Adjustment Mode. 12
3-6. White Balance Adjustments.. 12
Section Title Page
4. S AFETY RELATED ADJUSTMENT. 13
5. CIRCUIT ADJUSTMENTS
5-1. Electrical Adjustment by Remote Commander. 15
5- 2. A Board Adjustments. 17
6. DIAGRAMS
6- 1 . Block Diagrams. 19
6-2. Circuit Boards Location.22
6-3. Primed Wiring Boards and Schematic Diagrams.22
• A Board.23
• C Board.3 I
6- 4. Semiconductors.32
7. EXPLODED VIEWS
7- 1 . Chassis.33
8. ELECTRICAL PARTS LIST . 3 4
CAUTION!
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
ATTENTION
APRES AVOIR DECONNECTE LE CAP DE L'ANODE, COURT-
CIRCUITER L'ANODE DU TUBE CATHODIQUE ET CELUI DE
L'ANODE DU CAP AU CHASSIS METALLIQUE DE L'APPAREIL,
OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE
CATHODIQUE OU AU BLINDAGE DU TUBE CATHODIQUE.
WARNING!
ATTENTION!!
AN ISOLATION TRANSFORMER SHOULD BE USED DURING
ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD,
BECAUSE OF LIVE CHASSIS.
THE! CHASSIS OF THIS RECEIVER IS DIRECTLY CONNECTED
TO THE AC POWER LINE.
AFIN D’EVITER TOUT RESQUE D'ELECTROCUTION PROVENANT
D'UN CHASSIS SOUS TENSION, UN TRANSFORMATEUR
D’ISOLEMENT DOIT ETRE UTILISE LORS DE TOUT DEPANNAGE.
LE CHASSIS DE CE RECEPTEUR EST DIRECTEMENT
RACCORDE A L'ALIMENTATION SECTEUR.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK A ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND INTHE
PARTS LIST ARE CRITICAL FOR SAFE OPERATION.
REPLACETHESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT
ADJUSTMENTS THAT ARE CRITICAL FOR SAFE OPERATION
ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE
PROCEDURES WHENEVER CRITICAL COMPONENTS ARE
REPLACED OR IMPROPER OPERATION IS SUSPECTED.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
LES COMPOSANTS IDENTIFIES PAR UNETRAME ET PAR UNE
MARQUE A SUR LES SCHEMAS DE PRINCIPE, LES VUES
EXPLOSEES ET LES LISTES DE PIECES SONT
D'UNEIMPORTANCE CRITIQUE POUR LA SECURITE DU
FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST
INDIQUE DANS LE PRESENT MANUEL OU DANS DES SUPPLE¬
MENTS PUBLIES PAR SONY. LES REGLAGES DE CIRCUIT
DONT L'IMPORTANCE EST CRITIQUE POUR LA SECURITE DU
FONCTIONNEMENT SONT IDENTIFIES DANS LE PRESENT
MANUEL. SUIVRE CES PROCEDURES LORS DE CHAQUE
REMPLACEMENT DE COMPOSANTS CRITIQUES, OU
LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE.
— 3

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
Connecting a Camcorder • Connecting an Audio System * Using the Remote Control • Inserting Batteries • Changing the Menu Languag
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Warnings and Cautions • Connecting the TV • Connecting an Antenna • Connecting a Cable Box * Connecting a VCR
4

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145}
KV-21PM2/21R22/21R22C/21RD2 {RM-Y146)
Setting up Your Channels • Setting Cable TV On or Off • Auto Programming • Erasing or Adding Channels
5

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145}
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
Using the VIDEO Menu • Adjusting the Video Settings
O)
6

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 {RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
Caption Vision • CHANNEL GUIDE • Listening with Headphones
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— 7 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
SECTION 2
DISASSEMBLY
2-1. REAR COVER REMOVAL
(3) Rear Cover
(BVTP4X16)
2-2. A BOARD REMOVAL
2-3. SERVICE POSITION

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
• REMOVAL OF THE ANODE-CAP
NOTE: Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon painted on the CRT, after
removing the anode.
• REMOVAL PROCEDURES
0 Turn up one side of the rubber cap in
the direction indicated by arrow ®.
@ Use your thumb to pull the rubber cap ®
firmly in the direction indicated by
arrow (§).
. HOW TO HANDLE AN ANODE-CAP
® Do not use sharp objects which may cause damage to the sur¬
face of the anode-cap.
@ Do not squeeze the rubber covering too hard to avoid damag¬
ing the anode-cap. A material fitting called a shatter-hook ter¬
minal is built into the rubber.
® Do not force turn the foot of the rubber cover. This may cause
the shatter-hook terminal to protrude and damage the rubber.
When one side of the rubber cap sepa¬
rates from the anode button, the anode-
cap can be removed by turning the rub¬
ber cap and pulling it in the direction of
arrow ©.
— 9 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21R D2 (RM-Y146)
SECTION 3
SET-UP ADJUSTMENTS
• The following adjustments should be made when a
• Perform the adjustments in order as follows:
complete realignment is required or a new picture
tube is installed. These adjustments should be performed
1. Beam Landing
with rated power supply voltage unless otherwise noted.
2. Convergence
3. Focus
4.
Screen (G2) and White Balance
The controls and switch should be set as follows
unless otherwise noted:
Note: Test Equipment Required
PICTURE control.normal
1. Color Bar Pattern Generator
2. Degausser
BRIGHTNESS control.normal
3. DC Power Supply
4. Digital Multimeter
3-1. BEAM LANDING
Preparation:
• Feed in the white pattern signal.
• Before starting, degauss the entire screen.
1. Input a raster signal with the pattern generator.
2. Loosen the deflection yoke mounting screw, and set the
purity control to the center as shown in Fig.2.
3. Turn the raster signal of the pattern generator to
green.
4. Move the deflection yoke backward, and adjust with the
purity control so that green is in the center and red and
blue are at the sides evenly. (Fig.3)
purity control
5. M ove the deflection yoke forward, and adjust so that the
entire screen becomes green. (Fig.l)
Fig.3
6. Switch over the raster signal to red and blue and confirm
the condition.
7. When the position of the deflection yoke is determined,
tighten it with the deflection yoke mounting screw.
8. When landing at the comer is not right, adjust by using
the disk magnets. (Fig.4)
Fig. 1
— 10 —
Fig.4

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
3-2. CONVERGENCE _
Preparation:
• Before starting, perform FOCUS, V. LIN and V. SIZE
adjustments.
• Set BRIGHTNESS control to minimum.
• Feed in dot pattern.
(1) Vertical Static Convergence
1. A djust V. STAT magnet to converge red, green and blue
dots in the center of the screen. (Vertical movement)
Tilt the V. STAT magnet and adjust static convergence
to open or close the V. STAT magnet.
2. W hen the V. STAT magnet is moved in the direction of
arrow © and ©. red, green, and blue dots move as
shown below:
If the blue dot does not converge with red and green dots,
perform the following steps:
• Move BMC magnet (a) to correct insufficient H. Static
convergence.
• Rotate BMC magnet (b) to correct insufficient V. Static
convergence.
In either case, repeat Beam Landing Adjustment.
BMC magnet
BMC magnet
Fig. 6
Preparation:
♦ Before starting to perform Horizontal and Vertical
Static Convergence Adjustment.
1. Slightly loosen deflection yoke screw.
2. Remove deflection yoke spacers.
3. Move the deflection yoke for best convergence as shown
below.
4. Tighten the deflection yoke screw.
5. Install the deflection yoke spacers.
— 11 —

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
— 12 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
SECTION 4
SAFETY RELATED ADJUSTMENTS
A BOARD
- 3. HOLD-DOWN READJUSTMENT
H R525 CONFIRMATION METHOD (HV HOLD¬
DOWN CONFIRMATION) AND READJUSTMENTS jf t h e current setting indicated in step 2-2 cannot be met,
readjustment should be performed by altering the resistance
The following adjustments should always be performed when , . , _
value of R525 (a component marked with H).
replacing the following components (marked with 3 on the
schematic diagram).
IC30I, IC502, IC601. D505, D506, D507, D510, DY. C503,
C511. C513, C528, R511, R519. R520, R523, R525, R527,
R559, R560, R6I7, R618, T504 (FBT)
1. PREPARATION BEFORE CONFIRMATION
1) Tum the POWER switch ON. Input an entirely white
signal and set the PICTURE and BRIGHT controls to
maximum.
2) Confirm that the voltage at TP85 is more than 90V DC
when the set is operating normally with 120 0± 2.0
VAC supply. (KV-21 RS50/21R22/21RD2/21SD2/
21PM2/21PS2 ONLY)
or 220 ± 2.0 VAC supply (KV-21RS50C/21RS22C/
2IR22C).
2. HOLD-DOWN OPERATION CONFIRMATION
1) Connect the current meter between Pin 11 of the FBT
(T504) and the PCB land where Pin 11 would normally
attach.
2) Input a white signal and adjust the ABL current to be
1440 ± lOOpA using the PICTURE and the BRIGHT
controls.
3) Confirm the voltage of A board TP-91 is 113.2 ± 0.5
VDC.
4) Connect the DC power supply via diode lSS119and
Digital Voltmeter to TP-85.
5) Increase the DC power voltage gradually until the
picture blanks out.
6) Read the digital voltmeter indication.
7) Tum DC power source off immediately.
STANDARD
Less than or equal to 127.3 VDC
8) Input a dot signal and adjust the ABL current to be
95+100/-95pA using the PICTURE and the BRIGHT
controls.
9) Confirm the voltage of A board TP-91 is 116.7 ± 0.5
VDC.
10) Repeat steps from (4) to (7).
■ STANDARD
Less than or equal to 127.3 VDC
B+ VOLTAGE CONFIRMATION AND ADJUSTMENT
The following adjustments should always be performed
when replacing the following components.
IC001. 1C601. R030, R617. R618, R629, R630, R651 .R652,
R654. R655.R656
1) Supply 130 ± 2 0 ° V AC (KV-21RS50/2IR22/21RD2/21SD2/
21PM2/21PS2 ONLY) or 220 ± 20 ° VAC (KV-21RS50C/
21RS22C/2IR22C) to the set with a variable auto transformer.
2) Input a dot signal.
3) Set the PICTURE control and the BRIGHT control to minimum
condition.
4) Set to service adjustment mode.
5) Select PADJ with U and @ .
6) Adjust with [6] to the 0 level.
7) Confirm the voltage of A BOARD TP-91 is less than
123.0V DC.
8) If step 7 is not satisfied, replace the components, repeat the
above steps.
9) Supply 120.0 ±2.0 VAC (KV-21RS50/21R22/21RD2/21SD2/
21PM2/21PS2 ONLY) or 220 ± 2.0 VAC (KV-21 RS50C/
21RS22C/21R22C) to the set with a variable auto transformer.
10) Adjust with [H and [b] for the 116.7 ± 0.5V DC.
11) Write into the memory by pressing iMUTING! then lENTERl .
— 13 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
DIGITAL MULTIMETER
[A BOARD]
1 SS119
14

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 {RM-Y146}
SECTION 5
CIRCUIT ADJUSTMENTS
5-1. ELECTRICAL ADJUSTMENT BY REMOTE COMMANDER
Use Remote Commander (RM-YI45/YI46) to perform 7. Press ® then I ENTER! on the Remote Commander to
circuit adjustments on this model. initialize.
NOTE : Test Equipment Required.
1. Pattern Generator
2. Frequency Counter
3. Digital Multimeter
4. Audio OSC
1. M E THOD OF SETTING THE SERVICE
ADJUSTMENT MODE 8. Turn set off and on to exit.
SERVICE MODE PROCEDURE
1. Standby mode. (Power off)
2. IDISPLAYI _,[§- ♦ IVOL (+)l - I POWER; on the
Remote Commander. (Press each button within a
second.)
2. M EMORY WRITE CONFIRMATION METHOD
!. After adjustment, pull out the plug from the AC outlet,
then replace the plug in the AC outlet again.
2. Turn the power switch ON and set to service mode.
3. Call the adjusted items again to confirm they were adjusted.
3. A D JUST BUTTONS AND INDICATOR
Disp. Item
(Item) data
3. The CRT displays the item being adjusted.
4. Press GO or @ on the Remote Commander to select the
item.
5. Press [3] or [6] cm the Remote Commander to change the
data.
6. Press 1 MUTING] then IENTEKI to write into memory.
MUTING c, P pp POWER
v bLfcfcP
Write the memory '(^) ( ""
MTS DISPLAY TV/VIDEO
[display] CDJ ) CD
Service mode-* ‘ N
—- - ■ M ) (2) (3V
Item down 0-" (^)
© ®JJl
JUMP enter
o ® <x
CH GUIDE MENU
oHo
CD
VOL
|VOL(+) I ^
Service mode
CD
CH
©
[POWER |
Service mode
Da * a U P
- Data down
[5] Service mode
~[s] Initialize
enter|
Write into memory
RM-Y145
RM-Y146
— 15 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
4. AN ITEM OF ADJUSTMENTS
No.
Disp. Item
Data range Avq. data
1
AFC
AFC Loop Gain 0-3
‘1
2
VPOS V. Position
0-31
12
3 VSIZ
V. Size
0-63
23
4
VLIN
V. Linearity
0-15
8
5 VSCO S. Correction
0-15
5
6 HPOS H. Position
0-15
10
7
GDRV
Green-Drive
0-31
19
8 BDRV
Blue-Drive
0-31
16
9
GCUT
Green-Cutoff
0-15
6
10
BCUT Blue Cut Off
0-15
8
11
TOT
Chroma TOT-Filter
0, 1
*1
12 NR
Noise Reduction
0. 1
*0
13 SCON
Sub-Contrast
0-15
8
14
SHUE
Sub-Hue
0-15
8
15
SCOL Sub-Color
0-15
9
16 SBRT
Sub-Brightness
0-63
22
17
SSHP
Sub-Sharpness
0-15
*10
18 RON
Red-Off
0, 1
*1
19 GON
Green-Off
0, 1
*1
20 BON
Blue-Off
0, 1
*1
21
PREL Pre-Over Shoot
0-7
*4
22 AXIS Axis SW
0, 1
*1
23
DCOL
Dynamic-Color
0, 1
*0
24
REF
Reference-Position
0-3
*3
25
ABLM
ABL Mode
0-3
*2
26 CROM
Chroma Trap SW
0, 1
*0
27
OSDL
OSD Level
0, 1
1
28 Y-DC
DC Transmission 0-7
*5
29
GMMA
Gamma 0-7
*0
30 VEXT
V Sync Extend
0, 1
*1
31
VZOM
HV Comp
0-7
*4
32
CDMD V Countdown
0. 1
*0
33 RGBL RGB Limit
0-3
*3
34 YDLY
Y Delay
0-3
*0
35 SBAL
Left-Voiume
0-15
7
36
SBAS
Sub-Bass
0-15
9
37
STRE
Sub-Treble
0-15
7
38 DISP
Display Position
0-63
6
39 PADJ
B+ Adjustment
0-63
35
40
IDO IDO
0-256 by Model
41 ID1
1D1 0-256
by Model
42 ID2
ID2
0-256
by Model
43 ID3 ID3
0-256
by Model
44 ID4 ID4
0-256 by Model
* : Fixed value
Note: No.1 through 44 show adjustment order.
Note: IC001 on circuit board A inputs a V. Sync signal to
pin © and is always in operation. If a V. Sync signal
is input to pin © there will be a waiting period of 2-4
seconds, and the power is shut off. When entering
the service mode, the above function is cancelled
and operation is possible.
Adjust the function values as shown below when
IC003 on A board is replaced.
K V-21RS50C/21RS50
Iffll
Disp.
Data
40
■ a
25
41
IBi
1
m R
11
m HI
195
44
ID4
23
KV-21 RS22C/21SD2/21PS2
No. Disp.
Data
40
IDO
25
41
ID1
1
42
ID2
3
43
ID3
195
44 ID4
23
K V-21R22C/21R22/21RD2/21PM2
Disp.
Data
■ a
25
ESI
1
EH
Eli
0
E9
19
194
44 ID4
23
— 16 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145}
KV-21 PM2/21R22/21R22C/21RD2 (RM-Y146)
5-2. A BOARD ADJUSTMENTS
RF AGC ADJUSTMENT (IF BLOCK VR)
1. Input a color-bar signal.
2. Adjust AGC VR of TU10I so that snow, noise, and
cross-modulation disappear from the picture.
3. Verify picture quality on each channel.
H. FREQUENCY ADJUSTMENT
1. Input a monoscope signal.
2. Set to Service adjustment Mode.
3. Connect a frequency counter to base of Q550 (TP-86 H.
DRIVE).
4. Select the item of AFC, set to 3 level (free run).
5. Check H. Frequency for the 15800 ± 100 Hz.
6. Select the item of AFC again, adjust the level ''1
7. Write into the memory by pressing
[MUTING! then [ENTER 1 .
V. FREQUENCY ADJUSTMENT
1. Select video 1 with no signal input.
2. Set the conditions with standard setting.
3. Connect the frequency counter across CN501 VDY (+)
(pin 6) connector and ground.
4. Check V. Frequency for the 60 ± 2 Hz.
6. Connect an oscilloscope to CN703 Pin © (R OUT) of C
board and ground.
7. Select SCON with [T] and @ .
8. Adjust with S and [6j for: 1.8 ± 0.05 Vp-p.
9. R eset the item 1DCOL to "0" level.
10. W rite the memory by pressing [MUTING! then [ENTER
11 Return the following back to normal after adjustment.
PICTURE.
. MAX
COLOR .
. CENTER
BRIGHT .
. CENTER
R ON .
.ON (1)
G ON .
. ON (1)
B ON .
. ON (1)
SUB CONTRAST ADJUSTMENT (SCON)
1. Input a color-bar signal.
2. Select the red color.
3. Set to Service adjustment Mode.
4. Select the item DCOL to "I" level.
5. Set the conditions as follows.
PICTURE ....
. MAX
COLOR ....
. MIN
BRIGHT _
. CENTER
R ON ....
. ON (1)
G ON ....
. OFF (0)
B ON
. OFF (0)
1 ON
/0 OFF
DISPLAY POSITION ADJUSTMENT (D1SP)
1. Input a color-bar signal.
2. Set to Service adjustment Mode.
3. Select DISP with [U and @ .
4. Adjust with [3] and [6] for adjus tment of c haracters to center .
5. Write the memory by pressing [MUTINGl then [ENTER[ .
6. Check if the text is displayed on the screen.
SERVICE DISP 10
— 17 —

KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145)
KV-21PM2/21R22/21R22C/21RD2 (RM-Y146)
SUB BRIGHT ADJUSTMENT (SBRT)
H. CENTER ADJUSTMENT (HPOS)"]
1. Input a cross-hatch signal.
2. Set to Service adjustment Mode.
3. Set the PICTURE and BRIGHT to minimum.
4. Select SBRT with 0 and 31 •
5. Adjust with [3] and @ to obtain a fa intly visibl e cro ss-hatch.
6. Write into the memory by pressing 1 MUTING] then lENTERl .
SUB HUE, SUB COLOR ADJUSTMENT (SHUE, SCOL)
1. Input a color-bar signal.
2. Set to Service adjustment Mode.
3. Select the item DCOL and set to "1" level.
4. Connect an oscilloscope to CN703 Pin (3) (B OUT) of C
board.
5. Select SHUE and SCOL with 0 and @ .
6. Adjust with [3 and [6] for the VI - V4 ±0.1 Vp-p (SCOL)
and V2 = V3 ± 0.1 Vp-p (SHUE).
Note : Perform this adjustment after checking H. FREQUENCY.
1. Input a cross-hatch signal.
2. Set the Service adjustment Mode.
3. Select HPOS with 0 and 0 .
4. Adjust with [5] and H] for the best hor izontal center._
5. Write into the memory by pressing [MUTING] then I ENTER]
H. CENTER (HPOS)
V. LINEARITY (VL1N) AND V CORRECTION (VSCO)
ADJUSTMENTS.
1. Input a cross-hatch signal.
2. Set to Service adjustment Mode.
3. Select VLIN and VSCO with CO and [4] .
4. Adjust with [5] and 0 for the best picture.
5. Write the memory by pressing I MUTING] then 1 ENTER
7. After Sub-Color/Hue adjustment, increase 2 steps on (SCOL)
8. Reset the item DCOL to "0" level.
9. Write into the memory by pressing i MUTING] then I ENTER] .
V. SIZE ADJUSTMENT (VSIZ)
1. Input a cross-hatch signal.
2. Set to Service adjustment Mode.
3. Select VSIZ with 0 and 31.
4. Adjust with @ and [6] for the best vertical size.
V LINEARITY (VLIN)
—
=====
"ii :
VCORREC TION (VSCO)
m
BBS
V. SIZE (VSIZ)
V. CENTER ADJUSTMENT (VPOS)
1. Input a cross-hatch signal.
2. Set to Service adjustment Mode.
3. Select VPOS with 0 and 0 .
4. Adjust with [3] and 0 for the best vertical center.
5. Write into the memory by pressing I MUTING] then 1 ENTER]
V. CENTER (VPOS)
— 18 —

SECTION 6
6.1 BLOCK DIAGRAM DIAGRAMS

20