DOWNLOAD Sony GDM-500PS / GDM-500PST / GDM-500PST9 Service Manual ↓ Size: 5.12 MB | Pages: 55 in PDF or view online for FREE

GDM-500PS

US Model

Canadian Model

S. Hemisphere Model

Equator Model

Chassis No. SCC-L04E-A

GDM-500PST/GDM-500PST9

AEP Model

Chassis No. SCC-L04B-A

Picture tube

0.25 – 0.27 mm aperture grille pitch

21 inches measured diagonally

90-degree deflection

Viewable image size

Approx. 403.8 

×

 302.2 mm (w/h)

(16 

×

 12 inches)

19.8" viewing image

Resolution

Horizontal: Max. 1600 dots

Vertical: Max. 1200 lines

Standard image area

Approx. 388 

×

 291 mm (w/h)

(15 

3

/

8

 

×

 11 

1

/

2

 inches)

or

Approx. 364 

×

 291 mm (w/h)

(14 

3

/

8

 

×

 11 

1

/

2

 inches)

Deflection frequency

Horizontal: 30 to 107 kHz

Vertical: 48 to 160 Hz

AC input voltage/current

100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A

Power consumption

Max. 160 W

Dimensions

498 

×

 505 

×

 474 mm (w/h/d)

(19 

5

/

8

 

×

 20 

×

 18 

3

/

4

 inches)

Mass

Approx. 31 kg (68 lb 5 oz)

Supplied accessories

See page 6

Design and specifications are subject to change without notice.

MICROFILM

REVISED

– 2 –

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)

¡

¡

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.

1.5 k

Ω

0.15 

µ

F

AC
Voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

• The connector for DAS (ECS) adjustment is provided inside

the cover shown below. Be careful with an electrical shock

when connecting the connector with the power supplied. Also,

return the removed cover to the home position.

Rear side

– 3 –

This monitor meets the power-saving guidelines set by VESA and
Energy Star, as well as the more stringent NUTEK .
If the monitor is connected to a computer or video graphics board
that is VESA DPMS (Display Power Management Signaling)
compliant, the monitor will automatically reduce power con-
sumption in three stages as shown below.
You can set the delay time before the monitor enters the power
saving mode using the OSD. Set the time according to “Setting
the power saving delay time” on page 1-6.

Note
If no video signal is input to the monitor, the “NO INPUT SIG-
NAL” message (page 1-8) appears.  After the delay time has
passed, the power saving function automatically puts the monitor
into the active-off mode and the u indicator lights up orange. Once
the horizontal and vertical sync signals are detected, the monitor
automatically resumes its normal operation mode.

1

2

3

4

5

Normal operation

Standby (1st mode)

Suspend (2nd mode)

Active-off (3rd mode)

Power-off

≤

 160 W

≤

 100 W

≤

 15 W

≤

 5 W

0 W

present

absent

present

absent

—

present

present

absent

absent

—

active

blank

blank

blank

—

u

Green

Green and orange
alternate

Green and orange
alternate

Orange

Off

—

Approx. 3 sec.

Approx. 3 sec.

Approx. 10 sec.

—

Failre

+B failure

Horizontal / Vertical Deflection
failure, Thermal protector

ABL protector

HV failure

Aging / Self Test

Power LED

Orange

→

Off

(0.5 sec)

(0.5 sec)

Orange

→

Off

(1.5 sec)

(0.5 sec)

Orange

→

Off

(0.5 sec)

(1.5 sec)

Orange

→

Off

→

Orange

→

Off

(0.25 sec)

(0.5 sec)

(0.25 sec)

(1.25 sec)

Orange

→

Off

→

Green

→

Off

(0.5 sec)

(0.5 sec)

(0.5 sec)

(0.5 sec)

Aging Mode (Video Aging) : During Power Save, press “MENU” key for longer than 2 second.

Self Test (OSD Color Bar)

: During Power Save, press “CONTRAST” + (

/) key for longer than 2 second.

Reliability Check Mode

: During Power Save, press “CONTRAST” – (

?) key for longer than 2 second.

– 4 –

MODE AT PRODUCTION

MODE 1

MODE 2

RESOLUTION

738 X 414

1600 X 1200

CLOCK

28.322 MHz

229.500 MHz

— HORIZONTAL —

H-FREQ

31.469 kHz

106.250 kHz

usec

usec

H. TOTAL

31.777

9.412

H. BLK

5.720

2.440

H. FP

0.318

0.279

H. SYNC

3.813

0.837

H. BP

1.589

1.325

H. ACTIV

26.057

6.972

— VERTICAL —

V. FREQ(HZ)

70.087 Hz

85.000 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

97.9.10 VER.