Sony GDM-F500 Service Manual ▷ View online
CHASSIS
SERVICE MANUAL
SPECIFICATIONS
GDM-F500
N3P
US Model
Canadian Model
AEP Model
Chassis No. SCC-L03C-A
MICROFILM
TRINITRON
®
COLOR GRAPHIC DISPLAY
GDM-F500
– 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
microampers).
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.
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.
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.
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA
BOBINE DE DEMAGNETISATION EST ENLEVÉE.
BOBINE DE DEMAGNETISATION EST ENLEVÉE.
ATTENTION AUX COMPOSANTS RELATIFS À LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET
UNE MARQUE
UNE MARQUE
¡
SONT CRITIQUES POUR LA SÉCURITÉ.
NE LES REMPLACER QUE PAR UNE PIÈCE PORTANT LE
NUMÉRO SPECIFIÉ. LES RÉGLAGES DE CIRCUIT DONT
L’IMPORTANCE EST CRITIQUE POUR LA SÉCURITÉ DU
FONCTIONNEMENT SONT IDENTIFIÉS DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES LORS
DE CHAQUE REMPLACEMENT DE COMPOSANTS CRI-
TIQUES, OU LORSQU’UN MAUVAIS FONCTIONNE-MENT
EST SUSPECTÉ.
NUMÉRO SPECIFIÉ. LES RÉGLAGES DE CIRCUIT DONT
L’IMPORTANCE EST CRITIQUE POUR LA SÉCURITÉ DU
FONCTIONNEMENT SONT IDENTIFIÉS DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES LORS
DE CHAQUE REMPLACEMENT DE COMPOSANTS CRI-
TIQUES, OU LORSQU’UN MAUVAIS FONCTIONNE-MENT
EST SUSPECTÉ.
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
Ω
0.15
µ
F
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
CAUTION ON DAS (ECS) CONNECTOR
• 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.
STAND
GDM-F500
– 3 –
POWER SAVING FUNCTION
Failre
+B failure
Horizontal / Vertical Deflection
failure, Thermal protector
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)
(0.25 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.
DIAGNOSIS
GDM-F500
– 4 –
TIMING SPECIFICATION
MODE AT PRODUCTION
MODE 1
MODE 2
MODE 3
MODE 4
MODE 5
RESOLUTION
738 X 414
1600 X 1200
1800 X 1440
1800 X 1350
1364 X 1201
CLOCK
28.322 MHZ
229.500 MHZ
299.436 MHZ
299.000 MHZ
195.500 MHZ
— HORIZONTAL —
H-FREQ
31.469 kHz
106.250 kHz
120.740 kHz
120.565 kHz
106.250 kHz
usec
usec
usec
usec
usec
H. TOTAL
31.777
9.412
8.282
8.294
9.412
H. BLK
5.720
2.440
2.271
2.274
2.435
H. FP
0.318
0.279
0.668
0.669
0.276
H. SYNC
3.813
0.837
0.481
0.482
0.839
H. BP
1.589
1.325
1.122
1.124
1.320
H. ACTIV
26.057
6.972
6.011
6.020
6.977
— VERTICAL —
V. FREQ(HZ)
70.087 Hz
85.000 Hz
80.120 Hz
85.084 Hz
85.000 Hz
lines
lines
lines
lines
lines
V. TOTAL
449
1250
1507
1417
1250
V. BLK
35
50
67
67
49
V. FP
5
1
1
1
1
V. SYNC
2
3
3
3
3
V. BP
28
46
63
63
45
V. ACTIV
414
1200
1440
1350
1201
— SYNC —
INT(G)
NO
NO
NO
NO
NO
EXT(H/V)/POLARITY
YES N/P
YES P/P
YES P / P
YES P / P
YES P/P
EXT(CS) /POLARITY
NO
NO
NO
NO
NO
INT/NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
SIZE (21")
388 X 291mm
388 X 291mm
364 X 291mm
388 X 291mm
388 X 291 mm
98. 4.27 VER.
