How it Works
Sony
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SA-F21
User Manual
2 pgs132.75 Kb0
User Manual [ja]
2 pgs309.77 Kb0
Service manual
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Table of contents
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Sony SAF-21 Service manual

SA-F21
SERVICE MANUAL
SA-WMS21 SS-MS21
SPECIFICATIONS
US Model
Canadian Model
Singapore Model
ACTIVE SPEAKER SYSTEM
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. Look for unauthorized replacement parts, particularly transis­tors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.
4. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recom­mend their replacement.
5. Check the line cord for cracks and abrasion. Recommend the replacement of any such line cord to the customer.
6. Check the B+ voltage to see it is at the values specified.
7. 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
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 commer cial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follow the manuf acturers' 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 0.75V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63T rd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2V A C range are suit-
able. (See Fig. A)
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
Ω
Earth Ground
AC voltmeter (0.75 V)
WARNING!!
WHEN SERVICING, DO NO T APPR O A CH THE LASER EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMISSION, BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 25 cm FROM THE SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB­LISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM­POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
– 2 –

TABLE OF CONTENTS

Section Title Page
1. GENERAL............................................................ 1-1
2. BLOCK DIAGRAMS
2-1. Overall Block Diagram .................................................. 2-1
2-2. Audio/control Block Diagram ........................................ 2-3
2-3. Power Block Diagram .................................................... 2-5
3. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
3-1. Circuit Boards Location ................................................. 3-2
3-2. Frame Schematic Diagram ........................................... 3-3
3-3. Printed Wiring Boards and Schematic Diagrams ......... 3-5
Main, Jack, Sub Transformer
Printed Wiring Boards ................................................... 3-5
Main, Jack, Sub Transformer
Schematic Diagram ....................................................... 3-7
Control Printed Wiring Board ........................................ 3-9
Control Schematic Diagram .......................................... 3-11
Power, Speaker Terminal Printed Wiring Boards .......... 3-14
Power, Speaker Terminal Schematic Diagram.............. 3-15
4. REPAIR PARTS LIST
4-1. Exploded Views ............................................................. 4-1
4-1-1. SA-WMS21............................................................... 4-1
4-1-2. SS-MS21 .................................................................. 4-2
4-2. Electrical Parts List........................................................ 4-3
– 3 –
SECTION 1

GENERAL

SA-F21
This section is extracted from in­struction manual (3-071-506-11).
A
CD/DVD Player DVP-F21
to AUDIO OUT L to AUDIO OUT R
to VIDEO OUT
2
Audio cord (supplied)
English
Warning
To prevent fire or shock hazard, do not expose the unit to rain or moisture.
This symbol is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
For customers in the U.S.A.
Owner’s Record
The model and serial numbers are located at the rear of the unit. Record the serial number in the space provided below. Refer to them whenever you call upon your Sony dealer regarding this product.
Model No. SA-F21 Serial No.______________
NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: – Reorient or relocate the receiving antenna. – Increase the separation between the equipment and
receiver.
– Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/TV
technician for help.
CAUTION
You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.
For customers in Canada
CAUTION
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
1
Video cord (not supplied)
Subwoofer
3
Precautions
On safety
Should any solid object or liquid fall into the cabinet, unplug the speaker system and have it checked by qualified personnel before operating it any further.
On power sources
•AC power cord must be changed only at the qualified service shop.
•Before operating the speakers, check that the operating voltage is identical with your local power supply. The operating voltage is indicated on the nameplate on the rear of the speakers.
•The unit is not disconnected from the AC power source as long as it is connected to the wall outlet, even if the unit itself has been turned off.
•If you are not going to use the speakers for a long time, be sure to disconnect the speakers from the wall outlet. To disconnect the AC power cord, grasp the plug itself; never pull the cord.
On placement
• Do not install the appliance in a confined space, such as a bookcase or built-in cabinet.
• Do not place the speakers near heat sources, or in a place subject to direct sunlight, excessive dust or mechanical shock.
• Good ventilation is essential to prevent internal heat buildup. Place the speakers in a location with adequate air circulation, and in a way that does not block the rear ventilation holes.
On operation
•When turning on or off the subwoofer or other equipment, lower the volume of the subwoofer to minimum.
•To avoid damaging the subwoofer: – Be careful in setting the volume control of the
subwoofer to avoid an excessive input power.
– Do not open the enclosure or remold speaker units
and networks.
– The grill net is not removable. Do not remove it.
On the speaker system
Although this speaker system is magnetically shielded, there may be cases where the picture on some TV sets becomes magnetically distorted. In such a case, turn off the power of the TV set once, and after 15 to 30 minutes turn it on again. If there seems to be no improvement, locate the speaker system further away from the TV set. Also, be sure not to place objects in which magnets are attached or used near the speaker system, such as audio racks, TV stands, and toys. These may cause magnetic distortion to the picture due to their interaction with the system.
On cleaning
Clean the cabinet, panel and controls with a soft cloth slightly moistened with a mild detergent solution. Do not use any type of abrasive pad, scouring powder or solvent such as alcohol or benzine.
If you have any question or problem concerning your speaker system, please consult your nearest Sony dealer.
Setting Up
Step 1: Unpacking
Check that you have the following items:
•Audio cord (with red and white plugs) (1)
•Speaker cords (2.5 m) (2)
•Speaker stands (2)
•Stand screws (8)
•Washers for stand screws (8)
Step 2: Connecting Speakers
Before you start, turn off the power and disconnect the power cord of each Refer to the instructions supplied with the components to be connected.
Satellite speakers
Speaker cord (supplied)
component.
TV
A-1
A-2
Connecting to the DVP-F21 (fig. A)
1 Connect the player to the TV.
Use a video cord (not supplied). First remove the jack cover from the player, and then connect the VIDEO OUT jack of the player with the video input jack of the TV. You can use the video/audio cord with red, white and yellow plugs supplied with DVP-F21 instead of the video cord (not supplied). Connect the yellow plug only.
If you connect a TV with S VIDEO input jack, use an S VIDEO cord (not supplied). You will enjoy high quality images.
2 Connect the player to the subwoofer.
Use the supplied audio cord (with red and white plugs). Connect the AUDIO OUT L/R jacks of the player to the INPUT L/R jacks of the subwoofer. Connect the red plug to the red jack and white plug to the white jack.
3 Connect the satellite speakers to the
subwoofer.
Use the supplied speaker cords. Connect the cord with stripe to the # terminal.
Attach the jack cover to the player. You can install the player in three ways; horizontal, vertical or on the wall. See “Step 3: Attaching the Jack Cover” in the operating instructions supplied with the player.
Notes
•Plug cords securely to prevent unwanted noise. (fig.
A-1)
•Be sure to match the speaker cord to the appropriate terminal: + to + and – to –. If the cords are reversed, the sound will be distorted and will lack bass. (fig. A-
2)
Connecting to a component other than the
DVP-F21
Connect the SA-F21 in the same way as the DVP­F21. Connect the audio output L/R (front L/R) jacks of your player to the INPUT L/R jacks of the subwoofer in step 2.
Step 3: Installing Speakers
For greater flexibility in the positioning of the satellite speakers, use the supplied speaker stands. (fig. B) Speaker stands WS-FV10A, WS-TV10A, and WS­WV10A are also available on option.
You can install the satellite speakers on the wall using commercially available screws. (fig. C)
You need to determine the appropriate hanging screws and/or other necessary hardware needed to securely and safely fasten the speakers to the wall. Please be sure you have selected fasteners or screws that will fit in the hanging holes on the rear of the speaker.
Placement of the screws should be at the same height and should be 2 3/8 in. (59 mm) apart. The screws or other fasteners should protrude by 3/16 in. to 7/32 in. (4 to 5 mm). You may also mark placement of the screws or fasteners by use of something like a template.
Hang the speakers on the screws and push the speakers so that they fit against the wall.
BC
#
3
Insert up to here.
Notes
•When you install the speakers on the wall, make sure that the wall is strong enough to hang the speakers.
•When you disconnect or connect the cords, take the speakers down from the wall.
•For best possible surround sound, place the satellite speakers on both sides of the TV or monitor equal distances apart.
Step 4: Connecting the Power Cord
Connect the power cord of each component to the wall outlet.
Step 5: Setting Up for the CD/ DVD Player
You may need to make some setups for the player. Refer to the instructions supplied with the components to be connected.
If you are using the DVP-F21
When connecting to a wide screen TV, the image may not fit your TV screen depending on the disc. If you want to change the aspect ratio, select “SCREEN SETUP” in the Setup Display and then adjust the “TV TYPE”setting, see “Settings for the Display (SCREEN SETUP)” in the operating instructions supplied with the player.
Screw hole to attach the stand such as WS-FV10A, WS-TV10A, WS-WV10A (not supplied)
Playing the Disc (fig . D)
After connecting and setting up the player, you can play the disc.
1
Turn on the components. TV:
Turn on the TV and switch the input selector on the TV to the player.
Player:
Turn on the player.
2
Press ?/1 (power) on the subwoofer.
The subwoofer is turned on and the power indicator changes from red (standby) to green.
3
Press MODE on the subwoofer repeatedly until the MASTER VOL indicator lights up in green.
4
Press LEVEL – to turn down the volume to the minimum.
5
Insert the disc in the player.
6
Press H on the player.
Playback starts. Adjust the volume with LEVEL +/– on the subwoofer.
Using the headphones
Connect the headphones (not supplied) to the HEADPHONES jack on the subwoofer. To adjust the volume, press MODE on the subwoofer repeatedly until the MASTER VOL indicator lights up. Then press LEVEL +/–.
z The subwoofer automatically enters standby mode (Auto Power On/Off function)
If no audio signal is input to the subwoofer for about 3 minutes, the subwoofer automatically enters standby mode and the ?/1 (power) indicator changes to red. When an audio signal is input, the subwoofer turns on automatically and the ?/1 indicator changes to green. The Auto Power On/Off function works only when no audio signal is input for about 3 minutes. If you want to turn off the subwoofer at once, press ?/1 (power) on the subwoofer.
Adjusting the speakers
To select the volume to be adjusted
1
Press MODE repeatedly to turn on the desired volume indicator (MASTER VOL for entire volume or SW VOL for subwoofer volume).
2
Press LEVEL +/– to adjust the volume.
If you are using the DVP-F21
If you set the TV/DVD switch on the remote to DVD, you can adjust the entire volume with VOL +/– on the remote.
z Some of the remote that can control Sony AV
amplifiers (receivers) may be able to control the volume of this system.
To select a range to be adjusted
1
Press MODE repeatedly to turn on the desired range indicator (BASS for the low frequency range or TREBLE for the middle to high frequency range).
2
Press LEVEL +/– to adjust the volume.
3
/16 in.
(4.5 mm)
3
/8 in.
(9 mm)
Screws
To switch the subwoofer mode to match the bass output of the sound source
Press LEVEL + and – at the same time on the subwoofer to switch the subwoofer mode between MOVIE and MUSIC. The color of the SW VOL indicator will indicate the current mode. The default setting is MOVIE.
Mode Color For sound sources such as
MOVIE Green Movies MUSIC Red Music
To return the volume setting to the default setting
While pressing LEVEL + and – at the same time, press ?/1 (power) on the subwoofer.
3
/16 – 7/
32
(4 – 5 mm)
2 3/8 in. (59 mm)
in.
Troubleshooting Guide
If you experience any of the following difficulties while using the system, use this troubleshooting guide to help remedy the problem before requesting repairs. Should any problem persist, consult your nearest Sony dealer.
The subwoofer automatically entered standby mode.
, Auto Power On/Off function worked because
no audio signal had been input for about 3 minutes.
There is no sound from the speakers.
, The system is not connected correctly. , The system is connected by incorrect
connecting cords.
, The volume is turned down to the minimum. , The headphones are connected.
Sound is noisy.
, The system is not connected correctly. , Audio equipment or such is placed close to an
equipment causing noise such as TV.
, The plugs and jacks are dirty.
Sound stops suddenly.
, The system is not connected correctly. , Short-circuit occurred to the stripped speaker
cord.
D
Parts and controls
1 2
1 ?/1 (power) button/indicator
3
2 MODE (mode) button
4
3 MASTER VOL (master volume) indicator
5
4 SW VOL (subwoofer volume) indicator
6
5 BASS (bass) indicator
7
6 TREBLE (treble) indicator 7 LEVEL (level) +/– buttons 8 HEADPHONES (headphones) jack
8
1-1 1-2 E
2-1. OVERALL BLOCK DIAGRAM
SA-F21
SECTION 2

BLOCK DIAGRAMS

INPUT
L
R
MAIN BOARD
(SEE PAGE 3-7)
PJ101
JACK BOARD
(SEE PAGE 3-8)
IC601
J601
HEADPHONES
POWER BOARD
(SEE PAGE 3-15)
SPEAKER TERMINAL BOARD
(SEE PAGE 3-16)
RY301
SP101
SUB WOOFER
–
L
+
SPEAKER
IMP 4Ω
+
R
–
SS-MS21
L-CH
R-CH
IC107
IC103
HEADPHONE
AMP
LIMITER
AMP
IC109IC101
MUTE DRIVE
IC106 (2/2)
LPF
IC102
HPF
VOLUME,
TONE
CONTROL
MUTE
VOL CLK, VOL DATA, VOL CE
IC104
IC105 (1/2)
+
SOUND
CONTROL
SW DATA, SW CLK
IC105 (2/2)
HPF
IC106 (1/2)
+VSS
–VSS
IC301
POWER
AMP
IC401
POWER
AMP
RELAY
CONTROL
RY401
+
AC IN
SUB TRANSFORMER BOARD
(SEE PAGE 3-7)
05
T802
RY801
D810 – 813
T801
D801
+VCC
REG
+11V –11V
+5V
CONTROL BOARD
(SEE PAGE 3-11)
AUTO POWER
DETECT
IC502
SW DATA, SW CLK
VOL CLK, VOL DATA,
VOL CE
AUTO SW
+VCC
STANDBY
IC501
SYSTEM
CONTROL
IC802
+5V REG
S501 – 504
FUNCTION
SWITCH
D502 – 511
LED
IC504
RESET
+5V
2-1 2-2
SA-F21
2-2. AUDIO/CONTROL BLOCK DIAGRAM
INPUT
L
R
05
MAIN BOARD
(SEE PAGE 3-7)
PJ101
+
IC107
LINE AMP
3 1
5 7
IC103
MIX AMP
2 1
6 7
31 24
2 9
+
IC101
VOLUME,
TONE
CONTROL
IN2
IN1
IC105 (1/2)
MIX AMP
OUT2
OUT1
MUTE
CLK
DATA
LATCH
12
IC601
HEADPHONE AMP
3 1
5 7
D809
Q601 MUTE
POWER ON
IC105 (2/2)
HPF
Q605 MUTE DRIVE
Q806
MUTING
2
6
IC109
AMP
Q805, 807
CONTROL
LIMITER AMP,
5 7
1
7
RELAY
IC106
LPF
Q604
MUTE
Q603
MUTE
Q101, 102
MUTE DRIVE
POWER
(SEE PAGE 2-5)
Q602
MUTE
IC102
HPF
3 1
5 7
POWER
(SEE PAGE 2-5)
14
20 19 18
IC104
SOUND
CONTROL
20
SI
19
SCK
4 5 7 2 1
IN OUT
21
CN101 CN601
B+
CN103 CN303
CN808
CN102
1
2
3
4 5
1
3 4
MUTE/STBY
5
2
1
1
VOL DATA
2 3
4
8
AUTO POWER
9
10
HP L
GND
HP R
MUTE MUTE
L CH
R CH
SW
VOL CLK
VOL CE
SW DATA
SW CLK
DETECT
STANDBY
JACK BOARD
(SEE PAGE 3-8)
1
2
3
4 5
POWER BOARD
(SEE PAGE 3-15)
1
3 4 5
CN305
2
1
CN502
10
9 8
7
3
2
1
D502
I/1
D503
SW VOL
IC301
POWER AMP
INL
OUTL
6
8
RIN
OUTR
M/S
4
IC401
POWER AMP
IN1
OUT1
6
8
RI2
OUT2
M/S
4
Q301, 303, 305
RELAY
CONTROL
IC504
RESET SIGNAL
GENERATOR
IC502
AUTO POWER DETECT
OUTPUT 1
1
INPUT
OUTPUT 2
Q501
RELAY
CONTROL
3
1
3
1
3
6
7
Q503
LED
DRIVE
Q504
LED
DRIVE
Q505
LED
DRIVE
Q506
LED
DRIVE
J601
HEADPHONES
36 34 35
37 38 39
22
28
30
RESET
5
VOL_CLK VOL_DATA VOL_CE
SW_DATA SW_LATCH SW_CLK
AUTO SW
3
LED OPR
2
LED STBY
MOVIE
MUSIC
RY401
CN304
IC501
SYSTEM CONTROL
RIMOKON
MAIN_SW
LED_MIN
LED_LEVEL1
LED_LEVEL2
LED_LEVEL3
LED_MAX
LED_TREBLE
LED_BASS
LED_VOL
SPEAKER TERMINAL BOARD
(SEE PAGE 3-16)
KEY1
KEY2
CF1
CF2
1
2
3
4
5
25
4
13
14
47
46
45
44
43
33
32
31
10
11
CN305CN301
SUB WOOFER
RY301
SP101
S501
I/1
MASTER VOL
X501
6MHz
1
2
3
4
5
1
2
3
4
REMOTE COMMANDER
+5V
D504
MIN
D505
1
D506
2
D507
3
D508
MAX
D509
TREBLE
D510
BASS
D511
1
+5V
TH305
+
– –
+
IC503
RECEIVER
OUT
L
SPEAKER
IMP 4Ω
R
CONTROL BOARD
(SEE PAGE 3-11)
S502
MODE
S503
+
LEVEL
S504
–
IC501 q;
4.24 Vp-p
SS-MS21
L-CH
R-CH
2-3 2-4
2-3. POWER BLOCK DIAGRAM
SA-F21
AC IN
SUB TRANSFORMER BOARD
(SEE PAGE 3-7)
CN804
1
2
MAIN BOARD
(SEE PAGE 3-7)
CN803
1
2
CN801
1
2
T802
SUB
POWER
TRANS
RY801 F801
Q802 RELAY DRIVE
D811 D816 D815 D814
D812
D810
D813
CN806 CN805
T801
MAIN
POWER
TRANS
1
2
1
2
D801
IC801
+8V REG
1 3IN OUT
Q803
+11V REG
Q804
–11V REG
IC601
HEADPHONE
AMP
AUDIO/CONTROL
(SEE PAGE 2-3)
IC103
MIX
AMP
IC107
LINE AMP
IC104
SOUND
CONTROL
IC105
MIX,
HPF
IC106
LIMITER
AMP,
LPF
IC101
VOLUME,
TONE
CONTROL
IC102
HPF
IC109
AMP
CN102
CONTROL BOARD
(SEE PAGE 3-11)
+VCC
5
6
IC802
+5V REG.
1 3IN OUT
IC504
RESET
SIGNAL
GENERATOR
IC501
SYSTEM
CONTROL
IC502
AUTO POWER DETECT
IC503
REMOTE
COMMANDER
RECEIVER
AUDIO/CONTROL
(SEE PAGE 2-3)
+VSS
1
–VSS
3
05
POWER BOARD
(SEE PAGE 3-15)
CN302
1
3
IC301
POWER
AMP
IC401
POWER
AMP
2-5 2-6 E
SECTION 3

PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

SA-F21
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)
For printed wiring boards:
• X : indicates a lead wire mounted on the component side.
• x : indicates a lead wire mounted on the printed side.
• b : Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
For schematic diagram:
• Caution when replacing chip parts. New parts must be attached after removal of chip. Be careful not to heat the minus side of tantalum capacitor, because it is damaged by the heat.
• All resistors are in ohms, 1/ less otherwise specified. kΩ : 1000Ω, M Ω : 1000kΩ.
• All capacitors are in µF unless otherwise noted. pF : µµF 50V or less are not indicated except for electrolytics and tantalums.
• All variable and adjustable resistors ha ve characteristic curve B, unless otherwise noted.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
• f : internal component.
• C : adjustment for repair.
• U : B+ Line.
• V : B– Line.
• Circled numbers refer to w aveforms.
• Voltages are dc between measurement point.
• V oltage and wav eforms are dc with respect to ground under no-signal conditions.
• Readings are taken with a digital multimeter (DC 10MΩ).
• Voltage variations may be noted due to normal production tolerances.
Note:
The components identi­fied by mark 0 or dotted line with mark 0 are criti­cal for safety. Replace only with part number specified.
4
W (Chip resistors : 1/
Note:
Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié.
10
W) un-
When indicating parts by reference number, please include the board name.
• Abbreviation CND : Canadian model SP : Singapore model
3-1
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