5-4. Packing Materials (US and Canada Models Only) ........................................................................ 40
SECTION 6: ELECTRICAL PARTS LIST ............................................................................................................ 41
— 3 —
GDM-F520
1
2
3
5
4
Status
Area of Failure
LED Indication
Amber (0.5 second) / Off (0.5 second)
Amber (0.5 second) / Off (1.5 second)
+B
Horizontal/V
ertical Deflection Failure
Thermal Protector
ABL Protector
HV Failure
Failure 1
Failure 2
Failure 3
Failure 4
Aging/Self Test
6
Out of scan range
Amber (1.5 second) / Off (0.5 second)
Green (0.5 second) / Off (0.5 second)
Green (OSD Indication)
Amber (0.25 second) / Off (0.25 second)
Amber (0.25 second) / Off (1.25 second)
Amber (0.5 second) / Off (0.5 second)
POWER MANAGEMENT
The power saving mode complies with the VESA Display Power Management Signaling standard. Each state of power management shall be activated
by the host computer terminating the appropriate sync signals. Blanking the video must precede termination of the sync signals. The elapsed time
counter shall also be controlled by the host computer. Reactivation of the monitor shall be accomplished from the host computer by re-establishing the
normal sync signal.
Power consumption Screen Horizontal Vertical Power Recovery time Indicator
mode (video) sync signal sync signal consumption*
1 Normal operation active yes yes < 145 W -- Green
2 Active-off** (deep sleep)***blank no* no* < 3 W Orange
* Figures reect 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 mode. After a few seconds, the monitor enters power saving mode.
***"Deep sleep" is power saving mode dened by the Environmental Protection Agency.
DIAGNOSIS FUNCTION
When a failure occurs, the STANDBY/TIMER lamp will ash a set number of times to indicate the possible cause of the problem. If there is more than
one error, the lamp will identify the rst of the problem areas.
Aging Mode (Video Aging): During Power Save, press MENU button for longer than 2 seconds.
Self Test (OSD Color Bar): During Power Save, push up Control button for longer than 2 seconds.
Reliability Check Mode: During Power Save, push down Control button for longer than 2 seconds.
— 4 —
TIMING SPECIFICATION
MODE AT PRODUCTION
MODE 1MODE 2MODE 3MODE 4
RESOLUTION
640 X 4801600 X 12001920 X 14401920 X 1440
CLOCK
25.175 MHz229.500 MHz341.000 MHz297.000 MHz
--HORIZONTAL--
H-FREQ
31.469 kHz106.250 kHz128.485 kHz112.500 kHz
usecusecusecusec
H. TOTAL
31.7789.4127.7838.889
H. BLK
6.3562.4402.1522.424
H. FP
0.6360.2790.4570.485
H. SYNC
3.8130.8370.6220.754
H. BP
1.9071.3251.0731.185
H. ACTIV
25.4226.9725.6306.465
--VERTICAL--
V. FREQ (HZ)
59.940 Hz85.000 Hz84.977 Hz75.000 Hz
lineslineslineslines
V. TOTAL
525125015121500
V. BLK
45507260
V. FP
10111
3
V. SYNC
233
V. BP
33466856
V. ACTIV
480120014401440
--SYNC--
INT(G)
NONONONO
EXT (H/V) /POLARITY
YES N/NYES P/PYES P/PYESN/P
EXT (CS) /POLARITY
NONONONO
INT/NON INT
NON INTNON INTNON INTNON INT
GDM-F520
— 5 —
WARNINGS AND CAUTIONS
CAUTION
Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield, or carbon painted on the CRT, after
removing the anode.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this
receiver is directly connected to the ac power line.
! SAFETY-RELATED COMPONENT WARNING!!
GDM-F520
Components identied 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 identied in this manual. Follow these procedures whenever critical
components are replaced or improper operation is suspected.
ATTENTION!!
Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique de
l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.
An d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identies par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero de
piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance est
critique pour la securite du fonctionnement sont identies dans le present manuel. Suivre ces procedures lors de chaque remplacement
de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.
— 6 —
SAFETY CHECK-OUT
AC
Outlet Box
Ohmmeter
Cold-water Pipe
To Exposed Metal
Parts on Set
1.5 K Ω
AC
Voltmeter
(0.75 V)
Earth Ground
GDM-F520
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
touching 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 specied 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.
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
2. A battery-operated AC milliampmeter. The Data Precision 245
3. Measuring the voltage drop across a resistor by means of a VOM
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining
screw on most AC outlet boxes is also at earth ground. If the retaining
screw is to be used as your earth ground, verify that it is at ground
by measuring the resistance between it and a cold-water pipe with an
ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt troublelight (not a neon lamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate the hot side on the
line; the lamp should light at normal brilliance if the screw is at ground
potential (see Figure B).
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
digital multimeter is suitable for this job.
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
Figure A. Using an AC voltmeter to check AC leakage.Figure B. Checking for earth ground.
— 7 —
1-1. CABINET REMOVAL
1
B
B
A
A
C
C
Two screws
(+BVTP 4 x 16)
6
Slide the EMI shield in the direction
of arrow and remove four claws.
7
EMI shield
5
Three screws
(+BVTT 4 x 8)
4
Four screws
(+BVTT 4 x 8)
Two claws
3
Push the upper side of the cabinet assembly
in the direction of arrow , disconnect claws,
then remove the cabinet assembly
lifting it up in the direction of arrow .
Bezel
EMI shield
Cabinet assembly
Cabinet assembly
Bezel
Push in the tip of a screwdriver
about 10mm to unlock the claw.
22
GDM-F520
SECTION 1: DISASSEMBLY
— 8 —
1-2. SERVICE POSITION
1
2
3
4
1
Remove the D board.
D board
2
Remove the Video block assembly.
3
Install the Adaptor board (XT MOUNT) (A-1391-123-A).
4
Lay the Video block assembly.
Video block assembly
Video block assembly
5
5
Install the video block assembly.
6
Put a box which is about 15cm in height under the D board to fix it.
(Please disconnect the CN 701 first.)
D board
Box
GDM-F520
— 9 —
Two screws
(+BVTT 4 x 6)
2
Video block assembly
11
Screw (+BVTT 4 x 8)
Five screws
(+BVTT 3 x 8)
USB case
15
US board
12
USB block assembly
3
Four screws
(+BVTP 3 x 8)
Video shield
Two screws (HEX)
Screw
(+BVTP 3 X 8)
7
Video case
9
Terminal board
assembly
10
A2 board
CN315
CN313
CN2601
1
4
5
6
Two screws
(+BVTT 3 X 8)
8
13
14
1-3. A2 BOARD (C BLOCK) REMOVAL
1
A2 board (C block)
CN318
CN315
GND
GDM-F520
1-4. A2 BOARD & US BOARD REMOVAL
— 10 —
3
Bezel
7
Input selector
9
H2 board
5
Three screws
(+BVTP 3 x 10)
4
Screw (+BVTP 4 x 16)
10
Lifting up two claws
in the direction of arrow.
4
Screw
(+BVTP 4 x 16)
11
L1 bracket
12
Magnetic MIU-221D
sensor
2
Four tapping screws (5)
8
Menu button
6
Control panel assembly
CN1500
CN1401
CN1400
1
Picture tube shield
Before removing the bezel assembly, secure
the picture tube by attaching two screws to
the picture tube shield at the positions shown
with an arrow (diagonal two places) to prevent
the picture tube from falling.
(Use the screws +BVTT 4 x 8 that fix EMI shield.)
1-5. BEZEL ASSEMBLY AND H2 BOARD REMOVAL
GDM-F520
— 11 —
A2 board
(C block)
Two screws
(+BVTT 4 x 6)
4
Two screws
(+BVTP 3 x 10)
3
Video block assembly
Rear plate assembly
6
Five screws
(+BVTP 3 x 10)
CN315
CN1103
CN1600
CN1601
CN1003
CN605
CN701
CN501
GND
CN602
CN601
CN318
GND
Connector (4P)
Connector (4P)
1
5
2
Screw (+BVTP 3 x 10)
4
D board
7
1-6. D BOARD REMOVAL
GDM-F520
— 12 —
a
b
Anode Button
c
1-7. PICTURE TUBE REMOVAL
4
Picture tube
1
Anode cap
2
A2 board
(C block)
3
Neck assembly
CN3
CN7
CN2
CN1
GND
GDM-F520
ANODE CAP REMOVAL
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove
the anode cap. Short between anode and coated earth ground strap of CRT.
NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon
painted on the CRT.
REMOVAL PROCEDURES
Turn up one side of the rubber cap in the
direction indicated by arrow a.
Use your thumb to pull the rubber
cap rmly in the direction indicated
by arrow b.
When one side of the rubber cap separates from
the anode button, the anode cap can be removed
by turning the rubber cap and pulling it in the
direction of arrow c.
HOW TO HANDLE AN ANODE CAP
1. Do not use sharp objects which may cause damage to the surface of the anode
cap.
2. To avoid damaging the anode cap, do not squeeze the rubber covering too hard.
A material tting called a shatter-hook terminal is built into the rubber.
3. Do not force turn the foot of the rubber cover. This may cause the shatter-hook
terminal to protrude and damage the rubber.
When replacing parts shown in the table below, the following
operational checks must be performed as a safety precaution
against X-ray emissions from the unit.
Conrm one minute after turning on the power.
2-1. HV REGULATOR CIRCUIT CHECK
1. Turn the RV901 slowly, and adjust so that high voltage is in the
specied range.
[Specication]: 27.00 ± 0.05 kV
2. Check that the voltage of D912 cathode on the D board is 17.0V
or more.
2-2. HV PROTECTOR CIRCUIT CHECK
1. Using external DC Power Supply, apply the voltage shown below
between cathode of D912 and GND, and check that the RASTER
disappears.
[Specication]: 19.95 ± 0.00/-0.05V
2-3. BEAM CURRENT PROTECTOR CIRCUIT
CHECK
1. Connect constant current source to a section between T901 (FBT)
11
pin and GND, and check that the RASTER disappears when
the specied current ows to the 11 pin.
[Specication]: 2.12 ± 0.00/-0.051 mA
— 15 —
GDM-F520
IBM at Computer
as a Jig
1
2
3
1-690-391-21
A-1500-819-A
Interface Unit
3-702-691-01
Connector Attachment
BUS CONNECTOR
To
D-Sub
(9 Pin [female])
Mini Din
(8 Pin)
4 Pin
4 Pin
4 Pin
* The Parts above ( ) are necessary for DAS Adjustment.
1
3
~
± 6 ± 6 ± 6
± 6 ± 6 ±
6
± 6 ± 6 ±
6
<Specifications>
A
djust so that the green is within
the specification given right.
4 corner adjust target : within ±
1
The red and blue must be within
the specification given right with
respect to the green.
A
difference between red and blue
must be within the specification
given right.
0 ± 3 0 ± 7.5 0 ± 3
0 ± 3 0 ± 7.5 0 ±
3
0 ± 3 0 ± 7.5 0 ±
3
(µm)
(µm)
101010
1071
0
101010
(µm)
SECTION 3: ADJUSTMENTS
Connect the communication cable of the connector located on the D Board on the monitor. Run the service software and then follow the instructions.
Allow a 30 minute warm-up period prior to making the following
adjustments.
3-1. LANDING ROUGH ADJUSTMENT
1. Display the all white pattern.
2. Set contrast to 255.
3. Display plain green pattern.
4. Slide the DY back and roughly adjust the plain green pattern with
the purity magnet so that it is centered on the screen.
5. Adjust the DY tilt.
NOTE: Set ROTATION to 128 and LCC_NS to 128 when adjusting
the DY tilt.
6. Lightly tighten the DY screw.
3-2. LANDING FINE ADJUSTMENT
NOTE: (1) After adjusting W/B (9300k), measure the average of ΣΙΚ
with all white video input, while CONTRAST is maximum
and BRIGHTNESS is centered. Make the adjustments so
that the miss-landing becomes least after aging 2H with
the ΙΚ 30% of measured value shown above.
(2) The magnetic eld shall be BH = 0.
(3) When adjusting at other than BH = 0, calculate the shifted
value from BH = 0.
1. Place the monitor in the Helmholtz coil.
2. Set as follows;
LCC-SW = 0 (LCC Correction Current = 0)
FUNCTION_SW bit1 = (Auto Degauss = On)
CONTRAST = 255
3. Display plain green pattern.
4. Degauss the iron part of the chassis with a hand-degausser and
degauss coil.
5. Degauss the CRT face with degauss equipment or hand-degausser.
6. Input AC 230V to AC IN and turn the monitor off and on to activate
the auto degausser.
7. Reset FUNCTION_SW bit 1 to 0 (auto-degauss = off)
8 Repeat step 5 by degaussing the CRT face with degauss equipment
or hand-degausser.
9. Attach a wobbling coil to the specied position of CRT neck.
10. Put on landing sensor to CRT face.
11. Set LCC_SW to 12.
12. With landing checker, adjust DY position, purity, DY center and the
landing of the 4 corners.
13. Read VX and VY values which are read out of the magnetic sensor,
and write to LCC_VX_REF and LCC_VY_REF.
14. Adjust landing by LCC_NS, LSS_LT, LCC_LB, LCC_RT, and
LCC_RB. Adjustment of registers shall be limited within the
following range:
LCC_NS: 128 ± 15
LCC_LT, LCC_LB, LCC_RT, and LCC_RB: 128 ± 40
Set LCC_SW to 13, and Perform Service Save.
15. Tighten DY screw within specied torque, and auto-degauss.
NOTE: Torque 22 ± 2 kgcm (2.2 ± 0.2 Nm)
— 16 —
GDM-F520
a
b
cd
<How to place wedge>
Green plain crosshatch pattern
a and b should be equal.
c and d should be equal.
Plaster RTV to both sides for the upper wedge.
Make sure that they settle inside DY.
Plaster RTV to one side for other wedges.
Purity
4-pole magne
t
6-pole magne
t
2-pole magne
t
H.TRAP
TB-PIN
TLH
XCV
XBVXCV
B
R
B
R
R
B
B
R
R
BBR
TLV
TLH
YBHYCH
R B
R B
Convergence Specification
B
A
A
0.20 mm
B
0.24 mm
V
16. Adjust the vertical angle of the DY to make the top and bottom pins
equal (a = b). The horizontal angle is not changed (straight). Settle
DY upright without leaning, and insert wedges rmly so that the DY
does not move.
3-3. CONVERGENCE ROUGH
ADJUSTMENT
1. Display the white crosshatch pattern.
2. Pile the convex parts of the 6-pole magnet for convergence
together.
3. Roughly adjust H.CONV and V.CONV with the 4-pole magnet.
17. Adjust the top and bottom pins correction VR.
18. Adjust the horizontal trapezoid distortion by DY horizontal trapezoid
correction VR.
19. Check the landing at each corner. If the landing is not set to
specication, adjust the landing of the 4 corners with LCC_NS,
LSS_LT, LCC_LB, LCC_RT, and LCC_RB. The limitations of
registers are shown below:
LCC_NS: 128 ± 15
LCC_LT, LCC_LB, LCC_RT, and LCC_RB: 128 ± 40
20. Remove the sensor and wobbling coil.
21. Switch signals to R, G, B, and then check that the pure colors have
good color purity.
22. Fix purity magnets with white paint.
3-4. WHITE BALANCE ADJUSTMENT
SPECIFICATION
1. 9300 K
x = 0.283 ± 0.005
y = 0.298 ± 0.005
(All White)
— 17 —
2. 6500 K
x = 0.313 ± 0.005
y = 0.329 ± 0.005
(All White)
3. 5000 K
x = 0.346 ± 0.005
y = 0.359 ± 0.005
(All White)
3-5. VERTICAL AND HORIZONTAL POSITION
B
a
a 1.8 mm
b 1.8 mm
a
b
b
A
MODE
A
B
4 : 3
388
291
Focus (V)
Focus (H)
AND SIZE SPECIFICATION
3-6. FOCUS ADJUSTMENT
1. Adjust Focus (V) and Focus (H) for optimum focus.
The components identied by shading and ! symbol are critical for safety. Replace
only with part number specied.
The symbol indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
Les composants identies per un trame et une marque ! sont critiques pour la
securite. Ne les remplacer que par une piece portant le numero specie.
Le symbole indique une fusible a action rapide. Doit etre remplace par une
fusible de meme yaleur, comme maque.
The components identied by X in this basic schematic diagram
have been carefully factory-selected for each set in order to satisfy
regulations regarding X-ray radiation. Should replacement be necessary,
replace only with the value originally used.
When replacing components identied by Y, make the necessary
adjustments as indicated. If the results do not meet the specied value,
change the component identied by X and repeat the adjustment until
the specied value is achieved.
(Refer to Section 2: Safety Releated Adjustments.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specied.
All resistors are in ohms. kΩ=1000Ω, MΩ=1000kΩ
Indication of resistance, which does not have one for rating electrical
power, is as follows: Pitch : 5mm Rating electrical power : 1/
1
/
W in resistance, 1/
4
: internal component.
: earth ground
: earth-chassis
All variable and adjustable resistors have characteristic curve B, unless
otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10MΩ digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibillity.
Circled numbers are waveform references.
W and 1/
10
W in chip resistance.
8
: nonammable resistor.
: fusible resistor.
: panel designation and adjustment for repair.
: B+line.
: B-line (Actual measured value may be different).