Sony GDM-F500 Service Manual
HISTORY
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Model Name: GDM-F500
Part No. : 9-978-620-11
Date SUP/COR No. Description of SUP/COR
1999.01 COR-1
CORRECTED PART NO. OF TRANFORMER ASSY,
FLYBACK
Change of
main text
Yes
GDM-F500
SERVICE MANUAL
SPECIFICATIONS
US Model
Canadian Model
AEP Model
Chassis No. SCC-L03C-A
N3P
CHASSIS
MICROFILM
TRINITRON
®
COLOR GRAPHIC DISPLAY
GDM-F500
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 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.
To Exposed Metal
Parts on Set
AC
0.15 µF
1.5 k
Ω
Voltmeter
(0.75 V)
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
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” indication is 0.75 V, so analog meters must have an accurate lowvoltage 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 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.
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
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
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA
BOBINE DE DEMAGNETISATION EST ENLEVÉE.
ATTENTION AUX COMPOSANTS RELATIFS À LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET
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 CRITIQUES, OU LORSQU’UN MAUVAIS FONCTIONNE-MENT
EST SUSPECTÉ.
– 2 –
POWER SAVING FUNCTION
GDM-F500
DIAGNOSIS
Failre
+B failure
Horizontal / Vertical Deflection
failure, Thermal protector
ABL protector
HV failure
Aging / Self Test
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.
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)
Power LED
– 3 –
GDM-F500
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.
– 4 –
TABLE OF CONTENTS
Section Title Page
1. GENERAL ................................................................. 1-1
2. DISASSEMBLY
2-1. Cabinet Removal ............................................... 2-1
2-2. D Board Removal .............................................. 2-1
2-3. G Board Removal .............................................. 2-2
2-4. A Board Removal .............................................. 2-2
2-5. L Board Removal .............................................. 2-3
2-6. Service Position.................................................. 2-3
2-7. H1, H2 and J Boards Removal .......................... 2-4
2-8. US Board Removal............................................. 2-4
2-9. Picture Tube Removal ....................................... 2-5
2-10. Harness Location................................................ 2-6
3. SAFETY RELATED ADJUSTMENT............. 3-1
GDM-F500
4. ADJUSTMENTS ..................................................... 4-1
5. DIAGRAMS
5-1. Block Diagrams .................................................. 5-1
5-2. Frame Shcematic Diagram................................. 5-7
5-3. Circuit Boards Location ..................................... 5-9
5-4. Schematic Diagrams and Printed Wiring
Boards ................................................................. 5-9
(1) Schematic Diagrams of D (1/2, 2/2) Board ...... 5-13
(2) Schematic Diagrams of G, H1, H2, J and
L Boards ............................................................ 5-17
(3) Schematic Diagram of A Board ........................ 5-24
(4) Schematic Diagram of US Board ...................... 5-29
5-5. Semiconductors ................................................. 5-32
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
Note: Hand degauss must be used on stand-by or power-off condition.
This model has an automatic earth magnetism correction function by using an earth
magnetism sensor and a LCC coil. When using a hand degauss while monitor (LCC
coil) is being operated, it sometimes gets magnetized, and the system may not work
properly as a result.
– 5 –
1-1
The operating instructions mentioned here are partial abstracts
from the Operating Instruction Manual. The page numbers of
the Operating Instruction Manual remain as in the manual.
SECTION 1
GENERAL
1-2
1-3
1-4
1-5
1-6
1-7
1-8
GDM-F500
2-1. CABINET REMOVAL
6
Two screws
(+ BVTT 4 x 8)
7
Top cover
5
Four screws
(+ BVTT 4 x 8)
SECTION 2
DISASSEMBLY
3
Four screws
(+ BVTP 4 x 16)
1
Screw cover
4
Cabinet
2
Screw cover
2-2. D BOARD REMOVAL
4
Two screws
(+ BVTP 3 x 10)
5
D board
Attachment
1
Three screws
8
(+ BVTT 4 x 8)
9
Video shield
Screw
(+ BVTT 4 x 8)
2
Two screws
(+ BVTT 4 x 8)
B
GND
Side cover (D) assembly
Three hooks
3
Open the D block in the direction
of the arrow and remove of
the arrow .
2-1
A
A
B
2-3. G BOARD REMOVAL
2
1
Screw
(+ BVTT 4 x 8)
Two screws
(+ BVTT 4 x 8)
GND
B
4
Two screws
(+ BVTP 3 x 10)
5
G shield
6
Two screws
(+ BVTP 3 x 10)
7
Screw
(+ P 3.5 x 20)
9
G board
GND
GDM-F500
3
Open the G block in the direction
of the arrow and remove of
the arrow .
A
B
2-4. A BOARD REMOVAL
A
Three hooks
8
Two printed circuit board holders
3
A board (2/2)
Side cover (G) assembly
Rear shield assembly
Two screws
(+BVTT 4 x 8)
2
A board (1/2)
2-2
1
Three screws
(+BVTT 4 x 8)
GDM-F500
2-5. L BOARD REMOVAL
CN5002
CN5001
CN5004
CN5003
2
L board
2-6. SERVICE POSITION
1
Four printed circuit board holders
CAUTION : SHORT
D,G boards
Rear shield
If the claw is hooked,
opening and closing the
board is impossible.
Do not try to do it by force.
D board (Refer to 2-2. )
If the claw is hooked,
opening and closing the
board is impossible.
Do not try to do it by force.
A board (Refer to 2-4. )
G board
(Refer to 2-3.)
2-3
2-7. H1, H2 AND J BOARDS REMOVAL
5
Two screws
(+ BVTP 3 x 10)
6
H2 board
Claw
CN801
CN891
8
J board
1
Four screws
(Tapping screw 5)
7
Claw
GDM-F500
2
Bezel assembly
2-8. US BOARD REMOVAL
Knob
Claw
4
H1 board
3
Two screws
(+ BVTP 3 x 10)
5
US board
2
Stand cover
3
Six screws
(+ BVTP 3 x 10)
Cushion
4
Shield case
Claw
2-4
CN2601
1
Three screws
(+ BVTP 3 x 10)
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