SA-VA100 (serv.man2) - Sony Audio Service Manual (repair manual)

sa-va100 (serv.man2) service manual
Model
SA-VA100 (serv.man2)
Pages
82
Size
2.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / S/M SA-VA100 96 US AUS
File
sa-va100-sm2.pdf
Date

Read Sony SA-VA100 (serv.man2) Service Manual online

— 1 —
MICROFILM
SA-VA100
US Model
Australian Model
SERVICE MANUAL
• REAR SPEAKER
• FRONT SPEAKER SYSTEM
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
CDM-41
Optical Pick-up Type
KSM-2101BBM (S)
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
TCM-190RB53C
SPECIFICATIONS
TAPE
SECTION
CD
SECTION
HOME ENTERTAINMENT AUDIO SYSTEM
— 2 —
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
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 low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
To Exposed Metal
Parts on Set
0.15
µ
F
1.5k
AC
voltmeter
(0.75V)
Earth Ground
— 3 —
TABLE OF CONTENTS
1. SERVCING NOTE
.............................................................. 4
2. GENERAL
....................................................................
4
3. DISASSEMBLY
3-1.
Amplifier Block .................................................................. 26
3-2.
Mechanism Component Block ........................................... 27
3-3.
CD Mechanism and TC Mechanism Block ........................ 28
4. MECHANICAL ADJUSTMENT
................................... 30
5. ELECTRICAL ADJUSTMENT
..................................... 30
6. DIAGRAMS
6-1.
Circuit Boards Location ..................................................... 38
6-2.
Block Diagrams
• CD Section ....................................................................... 39
• Deck Section .................................................................... 41
• OSD Section ..................................................................... 43
• Surround Amp Section ..................................................... 45
• Display Section ................................................................ 47
• Power Section .................................................................. 48
6-3.
Printed Wiring Board — CD Section — ............................ 50
6-4.
Schematic Diagram — CD Section — ............................... 53
6-5.
Schematic Diagram — Deck Section — ............................ 57
6-6.
Printed Wiring Board — Deck Section — ......................... 61
6-7.
Printed Wiring Board — OSD Section — .......................... 64
6-8.
Schematic Diagram — OSD Section — ............................ 67
6-9.
Schematic Diagram — Surround Amp Section — ............. 71
6-10. Printed Wiring Board — Surround Amp Section — .......... 75
6-11. Printed Wiring Board — Display Section — ..................... 79
6-12. Schematic Diagram — Display Section — ........................ 83
6-13. IC Block Diagrams ............................................................. 86
6-14. IC Pin Function
• IC106 CD System Controller
(µPD78058GC-225-3B9) ................................................ 93
• IC301 Deck System Control (HD6433522P01F) ............ 95
• IC401 Display Control, FL Driver
(µPD780204GF-020-3BA) .............................................. 97
• IC602 OSD Controller (HD6413004F) ........................... 99
• IC605 OSD (MB90095PF-G-175) ................................ 101
• IC1501 Surround System Control
(µPD78042FGF-026-3B9) ............................................ 102
7. EXPLODED VIEWS
7-1.
L-ch Speaker System Section ........................................... 104
7-2.
Amplifier Seciton ............................................................. 105
7-3.
R-ch Speaker System Seciton ........................................... 106
7-4.
Mechanism Component Section ....................................... 107
7-5.
TC Mechanism Section 1 (TCM-190RB53C) .................. 108
7-6.
TC Mechanism Section 2 (TCM-190RB53C) .................. 109
7-7.
CD Mechanism Section 1 (CDM-41) ............................... 110
7-8.
CD Mechanism Section 2 (Tray Assembly) (CDM-41) ... 111
7-9.
CD Mechanism Section 3 (R Side Chassis Assembly)
(CDM-41) ......................................................................... 112
7-10. CD Mechanism Section 4 (Main Chassis Assembly)
(CDM-41) ......................................................................... 113
7-11. CD Mechanism Section 5 (Drive Unit Assembly)
(CDM-41) ......................................................................... 114
7-12. Rear Speaker System Section (SS-SR151) ...................... 115
8. ELECTRICAL PARTS LIST
........................................ 116
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PROD-
UCT MARKING is located on
the rear exterior.
MODEL IDENTIFICATION
— BACK PANEL —
R
L
Parts No.
• Abbreviation
AUS: Australian model
US model (Right)
AUS model (Right)
US model (Left)
AUS model (Left)
MODEL
PARTS No.
4-981-882-0 
4-981-882-1 
4-981-883-0 
4-981-883-1 
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK 
!
OR
DOTTED LINE WITH MARK 
!
 ON THE SCHEMATIC
DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL
TO SAFE OPERATION. REPLACE THESE COMPO-
NENTS WITH SONY PARTS WHOSE PART NUM-
BERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
— 4 —
Fluorescent display tube, all LEDs lit, key-check mode
Method:
1. In the STANDBY state, press the DOLBY NR button, 
p button,
and DISC 6 button together. All the fluorescent display tubes and
LEDs light up.
2. Press any one button to set the key check mode.
3. When the key check mode is set, KEY TEST is displayed on the
fluorescent display tube.
4. Total pressed number of buttons are displayed below the display.
(When the 
ª, ·, ∏, ¬ buttons are pressed, the LEDs light up.
Each time the DISC 1 to 7 buttons are pressed, the LEDs light up
alternately in orange and green.)
Buttons already pressed once will not be counted when pressed
again.
5. When all 26 buttons are pressed, SUM OK is displayed on the
fluorescent display tube.
6. To exit the mode, disconnect the AC plug from the outlet.
OSD Color Bar Mode (OSD:On Screen Display)
To check the video system of this unit, check that the color bar signal
can be output.
1. In the STANDBY state, press the DOLBY NR button, 
p button,
and OPEN/CLOSE button together.
2. The color bar is output.
The color bar signal is output from the MONITOR OUT terminal.
3. To exit the mode, disconnect the AC plug from the outlet.
SECTION  1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-up
block. Therefore, when checking the laser diode emission, observe
from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output four times.
Cold Reset
Mode which clears all the user memories of this unit and sets them to
the same state as that at shipment.
Method:
Press the DOLBY NR button, 
p button, and DISC 7 button together.
SHIP mode
This unit is provided with a SHIP mode to reduce damages of the
mechanism section due to shocks during transportation. Set this mode
after repairs before returning the product to the customer.
1. Press the SYSTEM POWER button, and check that all discs 1 to
7 are not in their trays.
2. Press the DOLBY NR button, 
p button, and DISC 7 button to-
gether, and perform cold reset.
3. Press the DIRECTION button, 
p button, and DISC 7 button to-
gether.
4. SHIP is displayed on the fluorescent display tube to indicate that
the SHIP mode has been set.
5. When the mechanism section stops operating, disconnect the AC
plug from the outlet.
Exiting the SHIP mode:
Insert the disconnected AC plug into the outlet again.
SECTION  2
GENERAL
This section is extracted from
instruction manual.
1 READY indicator
2 OPERATE indicator
3 CENTER SPEAKER EXT indicator
4 CENTER SPEAKER INT indicator
5 SPEAKERS indicator
6 SPEAKER ON/OFF button
7 HEADPHONES jack
1 2 3 4 5
7
6
Location of Parts and Controls
Left Front Speaker -Front panel-
Page of 82
Display

Download Sony SA-VA100 (serv.man2) Service Manual (Repair Manual)

Here you can read online and download Sony SA-VA100 (serv.man2) Service Manual in PDF. SA-VA100 (serv.man2) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SA-VA100 (serv.man2) Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.