CPD-G420 (serv.man3) — Sony Monitor Service Manual (repair manual)

Model
CPD-G420 (serv.man3)
Pages
80
Size
3.93 MB
Type
PDF
Document
Service Manual
Brand
Device
Monitor
File
cpd-g420-sm3.pdf
Date

View Sony CPD-G420 (serv.man3) Service Manual online

CHASSIS
SERVICE MANUAL
SPECIFICATIONS
CR1
S. Hemisphere Model
Equator Model
Chassis No. SCC-L33C-A
TRINITRON
®
 COLOR COMPUTER DISPLAY
CRT
0.24 mm aperture grille pitch 
19 inches measured diagonally 
90-degree deflection
FD Trinitron
Viewable image size
Approx. 365 
×
 274 mm (w/h) 
(14
3
/
8
  
×
 10
7
/
8
 inches) 
18.0" viewing image
Resolution
Maximum
Horizontal: 1920 dots
Vertical: 1440 lines
Recommended
Horizontal: 1280 dots
Vertical: 1024 lines
Input signal levels
Video signal
Analog RGB: 0.700 Vp-p 
(positive), 75 
SYNC signal
H/V separate or composite sync: 
TTL 2 k
, Polarity free
Sync on Green: 0.3 Vp-p 
(negative)
Standard image area
Approx. 352 
×
 264 mm (w/h) 
(13
7
/
8
  
×
 10
1
/
2
 inches)
or
Approx. 330 
× 
264 mm (w/h)
(13 
×
 10
1
/
2
 inches)
Deflection frequency*
Horizontal: 30 to 110 kHz
Vertical: 48 to 170 Hz
AC input voltage/current  100 to 240 V,  50 – 60 Hz, 2.0 – 1.0 A
Power consumption
Approx. 130 W (with no USB devices 
connected)
Dimensions
Approx. 451 
×
 471 
×
 461 mm (w/h/d) 
(17
7
/
8
 
×
 18
5
/
8
 
×
 18
1
/
4
 inches)
Mass
Approx. 25.5 kg (56 lb 3 oz)
Plug and Play
DDC2B/DDC2Bi, GTF**
* Recommended horizontal and vertical timing condition
• Horizontal sync width duty should be more than 4.8% of 
total horizontal time or 0.8 
µ
s, whichever is larger.
• Horizontal blanking width should be more than 2.3 
µ
sec.
• Vertical blanking width should be more than 450 
µ
sec.
** If the input signal is Generalized Timing Formula (GTF) 
compliant, the GTF feature of the monitor will automatically 
provide an optimal image for the screen.
Design and specifications are subject to change without notice.
CPD-G420
[with LCC]
CPD-G420(E)
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 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 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” indication 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)
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
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 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.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY  CHECK-OUT
CPD-G420(E)
3
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 APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS 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 IM-
PROPER OPERATION IS SUSPECTED.
CPD-G420(E)
4
POWER  SAVING  FUNCTION
This monitor meets the power-saving guidelines set by VESA, 
E
NERGY 
S
TAR, and NUTEK. If no signal is input to the 
monitor from your computer, the monitor will automatically 
reduce power consumption as shown below.
*
Figures reflect power consumption when no USB compatible 
peripherals are connected to the monitor.
** When your computer enters power saving mode, the input signal is 
cut and NO SIGNAL appears on the screen before the monitor enters 
active off mode. After a few seconds, the monitor enters power saving 
mode.
*** “Deep sleep” is power saving mode defined by the Environmental 
Protection Agency. 
Power mode
Power 
consumption
*
!
 (power) 
indicator
normal 
operation
 135 W (CPD-G520)
 130 W (CPD-G420)
green
active off**
(deep sleep)***
 3 W
orange
power off
Approx. 0 W
off
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Download Sony CPD-G420 (serv.man3) Service Manual (Repair Manual)

Here you can view online or download Sony CPD-G420 (serv.man3) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony CPD-G420 (serv.man3) Monitor. Information contained in Sony CPD-G420 (serv.man3) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).