SERVICE MANUAL
17VC CHASSIS
Design and specifications are subject to change without notice.
TRINITRON® COLOR MONITOR
AEP Model
Chassis No: SCC-L38MA
CPD-E250
9-978-888-01
Picture tube
0.24 mm aperture grill pitch (center)
17 inches measured diagonally
90-degree deflection
Video image area
(16.1" maximum viewing image)
Approx. 328 X 242 mm (w/h)
(13 x 95/8 inches)
Resolution
Horizontal: Max. 1600 dots
Vertical: Max. 1200 lines
Standard image area
Approx. 312 x 234 mm (w/h)
(123/8 x 91/4 inches)
Input signal
Video
Analog RGB (75 ohms typical)
0.7 Vp-p, ±5%, Positive
Sync
Separate HD/VD,
TTL Polarity Free
External Composite,
TTL Polarity Free
Sync on Green
Power Consumption
115 W
Deflection frequency
Horizontal: 30 to 85 kHz
Vertical: 48 to 170 Hz
AC input voltage/current 100 to 120 V, 50 to 60Hz, 1.7A
Dimensions
402 x 418 x 421 mm (w/h/d)
(157/8 x 161/2 x 165/8 inches)
Mass
Approx. 19 kg (41 lb 14 oz.)
SPECIFICATIONS
Self Diagnosis
Supported model
-- 3 --
CPD-E250
SECTION TITLE
PAGE
Power Management.................................................................................................................................. 4
Self Diagnosis Function ............................................................................................................................ 4
Timing SpeciÞcation.................................................................................................................................. 4
Warnings and Cautions............................................................................................................................. 5
Safety Check-Out .................................................................................................................................... 6
1. Disassembly
1-1. Cabinet Removal ............................................................................................................................... 7
1-2. Service Position................................................................................................................................. 7
1-3. A and D Board Removal .................................................................................................................... 8
1-4. Picture Tube Removal ....................................................................................................................... 9
Anode Cap Removal ......................................................................................................................... 9
2. Safety Related Adjustments
2-1. HV Regulator Check........................................................................................................................ 10
2-2. HV Protector Circuit Check.............................................................................................................. 10
2-3. Beam Protector Check (Software Logic) ......................................................................................... 10
2-4. B+ Voltage Check............................................................................................................................ 10
3. Adjustments
3-1. Landing Rough Adjustment ..............................................................................................................11
3-2. Landing Fine Adjustment ..................................................................................................................11
3-3. Convergence Rough Adjustment......................................................................................................11
3-4. Convergence and V. Key (H. TRP) Fine Adjustment ........................................................................11
3-5. Vertical and Horizontal Position and Size SpeciÞcation .................................................................. 12
3-6. Focus Adjustment ............................................................................................................................ 13
3-7. Digital Convergence Adjustment ..................................................................................................... 13
3-8. Convergence SpeciÞcation.............................................................................................................. 13
4. Diagrams
4-1. Circuit Boards Location ................................................................................................................... 14
4-2. Printed Wiring Board and Schematic Diagram Information ............................................................. 14
4-3. Block Diagrams ............................................................................................................................... 15
A Block Diagram.............................................................................................................................. 15
D Block Diagram ............................................................................................................................. 16
4-4. Schematics and Supporting Information.......................................................................................... 17
A Board - Schematic Diagram......................................................................................................... 17
D Board - Schematic Diagram ........................................................................................................ 19
H1 Board - Schematic Diagram ...................................................................................................... 21
4-5. Semiconductors............................................................................................................................... 22
5. Exploded Views
5-1. Picture Tube ................................................................................................................................... 23
5-2. Chassis............................................................................................................................................ 24
5-3. Packing Materials ............................................................................................................................ 25
6. Electrical Parts List ....................................................................................................................................... 26
TABLE OF CONTENTS
-- 4 --
CPD-E250
Power consumption
Screen
Horizontal
Vertical
Power
Recovery time
Indicator
mode
(video)
sync signal
sync signal consumption
1
Normal operation
active
yes
yes
< 115W
--
Green
2
Active-off (3rd mode)
blank
no*
no*
< 3 W
Approx. 10 sec.
Amber
3
Power-off
--
--
--
0 W (approx)
--
Off
* In this mode, the signal will appear in one of three ways: The Horizontal Sync Signal alone off, the Vertical Sync Signal
alone off, or both signals off.
POWER MANAGEMENT
The power saving mode complies with the VESA Display Power Management Signaling standard. Each state of power management shall be
activated by the host computer terminating the appropriate sync signals. Blanking the video must precede termination of the sync signals. The
elapsed time counter shall also be controlled by the host computer. Reactivation of the monitor shall be accomplished from the host computer by
re-establishing the normal sync signal.
TIMING SPECIFICATION
SELF DIAGNOSIS FUNCTION
When a failure occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the problem. If there is more
than one error, the lamp will identify the first of the problem areas.
Status
Area of Failure
LED Indication
1
Failure 1
HV or +B
Amber (0.5 second)/Off (0.5 second)
2
Failure 2
H Stop, V Stop, or S Connection Failure
Amber (1.5 second)/Off (0.5 second)
3
Failure 3
ABL
Amber (0.5 second)/Off (0.5 second)
4
Aging/Self Test
Amber (0.5 second)/Off (0.5 second)/
Green (0.5 second)/Off (0.5 second)
MODE
Test Mode
123456789
Resolution (H x V)
640 X 480
832 X 624
720 X 400
800 X 600
1024 X 768
1024 X 768
1280 X 1024
Dot Clock (MHz)
25.175
57.283
28.322
56.250
78.750
94.500
135.000
HORIZONTAL
Hor. Freq. (kHz)
31.469
49.725
31.469
53.674
60.023
68.677
79.976
H-Total
31.778
20.111
31.777
18.631
16.660
14.561
12.504
H-Blanking
6.356
5.586
6.355
4.409
3.657
3.725
3.022
H-Front Porch
0.636
0.559
0.636
0.569
0.203
0.508
0.119
H-Sync.
3.813
1.117
3.813
1.138
1.219
1.016
1.067
H-Back Porch
1.907
3.910
1.907
2.702
2.235
2.201
1.837
H-Active
25.422
14.524
25.422
14.222
13.003
10.836
9.481
(µsec)
VERTICAL
Ver. Freq. (Hz)
59.940
10
74.550
70.087
85.061
75.029
84.997
75.025
V-Total
525
667
449
631
800
808
1066
V-Blanking
45
43
49
31
32
40
42
V-Front Porch
10
V-Sync.
V-Back Porch
33
39
35
27
28
36
38
V-Active
480
624
400
600
768
768
1024
(lines)
SYNC.
Int (G)
Ext (H/V)/Polarity
YES -/-
YES -/-
YES -/+
NO +/+
YES +/+
YES +/+
YES +/+
Ext (C/S)/Polarity
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Int/Non Int
NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
TIMING SPECIFICATIONS
2
1
3
1
3
640 X 480
36.000
43.269
23.111
5.333
1.556
1.556
2.222
17.778
85.008
509
29
25
480
YES -/-
NO
NO
NON INT
1
3
12
2
1600 X 1200
202.500
93.750
10.667
2.765
0.316
0.948
1.501
7.901
75.000
1250
50
46
1200
YES +/+
NO
NO
NON INT
1
3
1
3
1
3
1
3
1280 X 1024
157.500
91.146
10.971
2.844
0.406
1.016
1.422
8.127
85.024
1.072
48
44
1024
YES +/+
NO
NO
NON INT
1
3
-- 5 --
CPD-E250
WARNINGS AND CAUTIONS
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.
WARNING!!
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.
! SAFETY-RELATED COMPONENT WARNING!!
Components identified by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe
operation. Replace these 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!!
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 la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.
Afin d'eviter tout risque d'electrocution provenant d'un chássis sous tension, un transformateur d'isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l'alimentation du secteur.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifies par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces
sont d'une importance 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 supplements 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 fonctionnement suspecte.
-- 6 --
CPD-E250
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
2. Check the interboard wiring to ensure that no wires are "pinched" or
touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and
mounting hardware have been replaced. Be absolutely certain that
you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors,
that were installed during a previous repair. Point them out to the
customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
6.
Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7.
Check the B+ and HV to see if they are specified values. Make
sure your instruments are accurate; be suspicious of your HV
meter if sets always have low HV.
8.
Check the antenna terminals, metal trim, "metallized" knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
Leakage Test
The AC leakage from any exposed metal part to earth ground and from
all exposed metal parts to any exposed metal part having a return to
chassis, must not exceed 0.5 mA (500 microamperes). Leakage current
can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instructions.
2. A battery-operated AC milliampmeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The "limit" indication is 0.75
V, so analog meters must have an accurate low voltage scale.
The Simpson's 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining
screw on most AC outlet boxes is also at earth ground. If the retaining
screw is to be used as your earth ground, verify that it is at ground
by measuring the resistance between it and a cold-water pipe with an
ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble-
light (not a neon lamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate the hot side on the
line; the lamp should light at normal brilliance if the screw is at ground
potential (see Figure B).
g
AC Outlet Box
Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.
To Exposed Metal
Parts on Set
0.15 F
1.5 K
AC
Voltmeter
(0.75 V)
Earth Ground