CHASSIS
SERVICE MANUAL
SPECIFICATIONS
CPD-4403
F99
AEP Model
Chassis No. SCC-L30N-A
(OEM STD)
Chassis No. SCC-L30Q-A
(ELSA, FORMAC)
TRINITRON® COLOR COMPUTER DISPLAY
CPD-4403
2
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part hav-
ing a return to chassis, must not exceed 0.5 mA (500 microam-
peres).
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 instruments.
2. A battery-operated AC milliammeter. 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" indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are
examples of a passive VOMs that are suitable. Nearly all
battery operated digital multimeters that have a 2 V AC
range are suitable. (See Fig. A)
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN
WHICH THE DEGAUSS COIL HAS BEEN REMOVED.
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 AP-
PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY. CIRCUIT ADJUST-
MENTS THAT ARE CRITICAL FOR SAFE OPERATION
ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE
PROCEDURES WHENEVER CRITICAL COMPONENTS
ARE REPLACED OR IMPROPER OPERATION IS SUS-
PECTED.
After correcting the original service problem, perform the fol-
lowing safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-sol-
dered connections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact 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 tran-
sistors, 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.
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY CHECK-OUT
1.5 k
0.15
µF
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
CPD-4403
3
POWER SAVING FUNCTION
DIAGNOSIS
CPD-4403
4
TIMING SPECIFICATION
MODE AT PRODUCTION
MODE 1
MODE 2
RESOLUTION
738 X 414
1600 X 1200
CLOCK
28.322 MHz
202.500 MHz
HORIZONTAL
H-FREQ
31.469 kHz
93.750 kHz
usec
usec
H. TOTAL
31.777
10.667
H. BLK
5.720
2.765
H. FP
0.318
0.316
H. SYNC
3.813
0.948
H. BP
1.589
1.501
H. ACTIV
26.057
7.901
VERTICAL
V. FREQ(HZ)
70.087 Hz
75.000 Hz
lines
lines
V. TOTAL
449
1250
V. BLK
35
50
V. FP
5
1
V. SYNC
2
3
V. BP
28
46
V. ACTIV
414
1200
SYNC
INT(G)
NO
NO
EXT(H/V)/POLARITY
YES N/P
YES P/P
EXT(CS) /POLARITY
NO
NO
INT/NON INT
NON INT
NON INT
99.10.26 VER.
CPD-4403
5
TABLE OF CONTENTS
Section
Title
Page
1. GENERAL ................................................................. 1-1
2. DISASSEMBLY
2-1.
Cabinet Removal ................................................ 2-1
2-2.
Shield (EMI, Video),
Side Cover (L and R) Removal .......................... 2-1
2-3.
A Board Removal ............................................... 2-2
2-4.
Rear Shield Complete Assy,
D Board Removal ............................................... 2-2
2-5.
Service Position .................................................. 2-3
2-6.
H Board Removal ............................................... 2-3
2-7.
Picture Tube Removal ........................................ 2-4
2-8.
Harness Location ................................................ 2-5
3. SAFETY RELATED ADJUSTMENT ............. 3-1
4. ADJUSTMENTS ..................................................... 4-1
5. DIAGRAMS
5-1.
Block Diagrams .................................................. 5-1
5-2.
Frame Schematic Diagram ................................. 5-5
5-3.
Circuit Boards Location ..................................... 5-6
5-4.
Schematic Diagrams and Printed Wiring
Boards ................................................................. 5-7
(1)
Schematic Diagram of A Board ......................... 5-9
(2)
Schematic Diagrams of D (a,b,c) Board .... 5-11
(3)
Schematic Diagrams of N, H Boards ................. 5-19
5-5.
Semiconductors .................................................. 5-21
6. EXPLODED VIEWS
6-1.
Chassis ................................................................ 6-1
6-2.
Picture Tube ........................................................ 6-2
6-3.
Packing Materials ............................................... 6-3
7. ELECTRICAL PARTS LIST ............................ 7-1