Read Sony GDM-FW900 Service Manual online
CHASSIS
SERVICE MANUAL
SPECIFICATIONS
G1W
US Model
Canadian Model
AEP Model
Chassis No. SCC-L34A-A
TRINITRON
®
COLOR GRAPHIC DISPLAY
GDM-FW900
CRT
0.23 – 0.27 mm aperture grille pitch
24 inches measured diagonally
90-degree deflection
FD Trinitron
24 inches measured diagonally
90-degree deflection
FD Trinitron
Viewable image size
Approx. 482.1
×
308.2 mm (w/h)
(19
×
12
1
/
4
inches)
19.8" viewing image
Resolution
Maximum (16:10)
Horizontal: 2304 dots
Vertical: 1440 lines
Vertical: 1440 lines
Maximum (4:3)
Horizontal: 2048 dots
Vertical: 1536 lines
Vertical: 1536 lines
Recommended (16:10)
Horizontal: 1920 dots
Vertical: 1200 lines
Vertical: 1200 lines
Input signal levels
Video signal
Analog RGB: 0.700 Vp-p
(positive), 75
(positive), 75
Ω
SYNC signal
H/V separate or composite sync:
TTL 2 k
TTL 2 k
Ω
, Polarity free
Sync on Green: 0.3 Vp-p
(negative)
(negative)
Standard image area
16:10
Approx. 474
×
296 mm (w/h)
(18
3
/
4
×
11
3
/
4
inches)
4:3
Approx. 395
×
296 mm (w/h)
(15
5
/
8
×
11
3
/
4
inches)
5:4
Approx. 370
×
296 mm (w/h)
(14
5
/
8
×
11
3
/
4
inches)
Deflection frequency*
Horizontal: 30 to 121 kHz
Vertical: 48 to 160 Hz
Vertical: 48 to 160 Hz
AC input voltage/current 100 to 240 V, 50/60 Hz, 2.2 – 1.2 A
Power consumption
Power consumption
Approx. 170 W (with no USB devices
connected)
connected)
Operating temperature
10˚C to 40˚C
Dimensions
Approx. 571.5
×
500
×
522.5 mm (w/h/
d) (22
1
/
2
×
19
3
/
4
×
20
5
/
8
inches)
Mass
Approx. 42 kg (92 lb 10 oz)
Plug and Play
DDC1/DDC2B/DDC2Bi, GTF**
Supplied accessories
• Power cord (1)
• Video signal cable (1)
• USB cable (1)
• Exclusive Power Mac G3/G4
• Video signal cable (1)
• USB cable (1)
• Exclusive Power Mac G3/G4
adapter (1)
• Warranty card (1)
• Notes on cleaning the screen’s
• Notes on cleaning the screen’s
surface (1)
• This instruction manual (1)
* Recommended horizontal and vertical timing condition
• Horizontal sync width duty should be more than 4.8% of
total horizontal time or 0.8 µs, whichever is larger.
• Horizontal blanking width should be more than 2.3 µsec.
• Vertical blanking width should be more than 450 µsec.
• Vertical blanking width should be more than 450 µsec.
** 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.
provide an optimal image for the screen.
Design and specifications are subject to change without notice.
GDM-FW900
– 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 FONCTIONNEMENT
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 FONCTIONNEMENT
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
GDM-FW900
– 3 –
POWER SAVING FUNCTION
DIAGNOSIS
This monitor is equipped with a self-diagnosis function. If there is
a problem with your monitor or computer(s), the screen will go
blank and the ! (power) indicator will either light up green or
flash orange. If the ! (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
a problem with your monitor or computer(s), the screen will go
blank and the ! (power) indicator will either light up green or
flash orange. If the ! (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
x
If the
!
(power) indicator is green
1
Disconnect any plugs from the video input 1 and 2
connectors, or turn off the connected computer(s).
connectors, or turn off the connected computer(s).
2
Press the
!
(power) button twice to turn the monitor
off and then on.
3
Move the joystick to the right for 2 seconds before
the monitor enters power saving mode.
the monitor enters power saving mode.
If all four color bars appear (white, red, green, blue), the monitor
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
If the color bars do not appear, there is a potential monitor failure.
Inform your authorized Sony dealer of the monitor’s condition.
Inform your authorized Sony dealer of the monitor’s condition.
x
If the
!
(power) indicator is flashing orange
Press the
!
(power) button twice to turn the monitor off
and then on.
If the ! (power) indicator lights up green, the monitor is working
properly.
properly.
If the ! (power) indicator is still flashing, there is a potential
monitor failure. Count the number of seconds between orange
flashes of the ! (power) indicator and inform your authorized
Sony dealer of the monitor’s condition. Be sure to note the model
name and serial number of your monitor. Also note the make and
model of your computer and graphic board.
monitor failure. Count the number of seconds between orange
flashes of the ! (power) indicator and inform your authorized
Sony dealer of the monitor’s condition. Be sure to note the model
name and serial number of your monitor. Also note the make and
model of your computer and graphic board.
MENU
INPUT
ASC
RESET
2
1
!
(power) indicator
This monitor meets the power-saving guidelines set by VESA,
E
NERGY
S
TAR, and NUTEK. If the monitor is connected to a
computer or video graphics board that is DPMS (Display Power
Management Signaling) compliant, the monitor will automatically
reduce power consumption in three stages as shown below.
Management Signaling) compliant, the monitor will automatically
reduce power consumption in three stages as shown below.
*
Figures reflect power consumption when no USB compatible
peripherals are connected to the monitor.
peripherals are connected to the monitor.
** “Sleep” and “deep sleep” are power saving modes defined by the
Environmental Protection Agency.
*** When your computer enters power saving mode, the input signal is
cut and NO INPUT SIGNAL appears on the screen before the
monitor enters active off mode. After a few seconds, the monitor
enters power saving mode.
monitor enters active off mode. After a few seconds, the monitor
enters power saving mode.
Power mode
Power
consumption
consumption
*
!
(power)
indicator
normal
operation
operation
≤
170 W
green
1 standby
≤
15 W
green and orange
alternate
alternate
2 suspend
(sleep)**
(sleep)**
≤
15 W
green and orange
alternate
alternate
3 active off***
(deep sleep)**
(deep sleep)**
≤
1 W
orange
power off
0 W
off
GDM-FW900
– 4 –
TIMING SPECIFICATION
PRIMARY MODE
PRIMARY
MODE AT PRODUCTION
MODE 1
MODE 2
MODE 3
MODE 4
MODE 5
MODE 6
MODE 7
MODE 8
MODE 9
RESOLUTION (HXV)
640 X 480
720 X 400
1920 X 1080
1600 X 1024
1920 X 1200
2304 X 1440
1600 X 1024
1920 X 1080
1920 X 1080
CLOCK
25.175 MHz
28.322 MHz
172.798 MHz
198.832 MHz
282.744 MHz
383.863 MHz
170.447 MHz
216.023 MHz
216.023 MHz
— HORIZONTAL —
H-FREQ
31.469 kHz
31.469 kHz
67.080 kHz
91.375 kHz
107.100 kHz
120.560 kHz
81.320 kHz
84.384 kHz
84.384 kHz
usec
usec
usec
usec
usec
usec
usec
usec
usec
H. TOTAL
31.778
31.777
14.908
10.944
9.337
8.295
12.297
11.851
11.851
H. BLK
6.356
6.355
3.796
2.897
2.546
2.292
2.910
2.963
2.963
H. FP
0.636
0.636
0.694
0.563
0.538
0.458
0.188
0.222
0.222
H. SYNC
3.813
3.813
1.204
0.885
0.736
0.667
0.939
1.000
1.000
H. BP
1.907
1.907
1.898
1.448
1.273
1.167
1.784
1.741
1.741
H. ACTIV
25.422
25.422
11.111
8.047
6.791
6.002
9.387
8.888
8.888
— VERTICAL —
V. FREQ(Hz)
59.940 Hz
70.087 Hz
60.000 Hz
85.000 Hz
85.000 Hz
80.000 Hz
76.000 Hz
72.000 Hz
72.000 Hz
lines
lines
lines
lines
lines
lines
lines
lines
lines
V. TOTAL
525
449
1118
1075
1260
1507
1070
1172
1172
V. BLK
45
49
38
51
60
67
46
92
92
V. FP
10
12
1
1
1
1
3
3
3
V. SYNC
2
2
3
3
3
3
3
3
3
V. BP
33
35
34
47
56
63
40
86
86
V. ACTIV
480
400
1080
1024
1200
1440
1024
1080
1080
— SYNC —
INT(G)
NO
NO
NO
NO
NO
NO
NO
NO
NO
EXT(H/V)/POLARITY
YES N/N
YES N/P
YES N/N
YES N/N
YES N/N
YES N/N
YES N/N
YES N/N
YES N/N
EXT(CS)/POLARITY
NO
NO
NO
NO
NO
NO
NO
NO
NO
INT/NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
NON INT
NON INT