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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
LEAKA GE TEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any e xposed 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
WT-540A. F ollow the man ufacturers' 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 r d are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2V AC 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 NOT APPR OA 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.
CAUTION:
The use of optical instrument with this product will increase eye
hazard.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
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.
– 2 –
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TABLE OF CONTENTS
Section Title Page Section Title Page
Service Note ............................................................................ 4
1. GENERAL
Getting Started .............................................................. 1-1
Playing Discs................................................................. 1-4
Using Various Functions with the Control Menu........... 1-6
Settings and Adjustments ............................................. 1-10
2. DISASSEMBLY
2-1. Case Removal ............................................................... 2-1
2-2. Rear Panel Removal ..................................................... 2-1
2-3. Tray Cover Removal ...................................................... 2-1
2-4. Front Panel Removal..................................................... 2-1
2-5. Power Block Removal ................................................... 2-2
2-6. Mechanism Deck Removal ............................................ 2-2
2-7. Tray Removal................................................................. 2-2
2-8. Optical Pick-up Removal............................................... 2-2
2-9. Belt, MB-86 Board, Loading Motor (M001),
MS-48 Board Removal .................................................. 2-3
2-10. AI-022 Board Removal.................................................. 2-3
2-11. Internal Views ................................................................ 2-4
2-12. Circuit Boards Location................................................. 2-5
3. BLOCK DIAGRAMS
6. TEST MODE
6-1. General Description ...................................................... 6-1
6-2. Starting Test Mode ........................................................ 6-1
6-3. Syscon Diagnosis.......................................................... 6-1
6-4. Drive Auto Adjustment .................................................. 6-5
6-5. Drive Manual Operation ................................................ 6-7
6-6. Mecha Aging ................................................................. 6-9
6-7. Emergency History........................................................ 6-9
6-8. Version Information ....................................................... 6-1 0
6-9. Video Level Adjustment ................................................ 6-10
6-10. If Con Self Diagnostic Function .................................... 6-11
7. ELECTRICAL ADJUSTMENT
7-1. Power Supply Adjustment............................................. 7-1
1. Power Supply Check ..................................................... 7-1
7-2. Adjustment of Video System......................................... 7-2
1. Video Level Adjustment ................................................ 7-2
2. S-terminal Output Check............................................... 7-2
3. Checking Component Video Output B-Y ...................... 7-2
4. Checking Component Video Output R-Y ...................... 7-2
5. Checking Component Video Output Y .......................... 7-3
6. Checking S Video Output S-C....................................... 7-3
7-3. Adjustment Related Parts Arrangement ....................... 7-4
3-1. Overall Block Diagram................................................... 3-1
3-2. RF/Servo Block Diagram............................................... 3-3
3-3. Signal Processor Block Diagram .................................. 3-5
3-4. Video/Audio Block Diagram .......................................... 3-7
3-5. System Control Block Diagram ..................................... 3-9
3-6. Interface Control Block Diagram ................................... 3-11
3-7. Power Block Diagram .................................................... 3-13
4. PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS
4-1. Frame Schematic Diagram ............................................ 4-3
4-2. Printed Wiring Boards and Schematic Diagrams ......... 4-5
MS-48 Printed Wiring Board and
Schematic Diagram....................................................... 4-5
MB-86 Printed Wiring Board ......................................... 4-7
MB-86 (RF AMP, SERVO) Schematic Diagram ............ 4-11
MB-86 (ARP) Schematic Diagram ................................ 4-13
MB-86 (AV DECODER) Schematic Diagram................ 4-15
MB-86 (SDRAM) Schematic Diagram .......................... 4-17
MB-86 (DRIVE) Schematic Diagram ............................ 4-19
MB-86 (SERVO DSP) Schematic Diag ram................... 4-21
MB-86 (SYSTEM CONTROL)
Schematic Diagram....................................................... 4-23
MB-86 (MEMORY, CLOCK GENERATOR)
Schematic Diagram....................................................... 4-25
AI-022 Printed Wiring Board ......................................... 4-27
AI-022 (VIDEO BUFFER) Schematic Diagram ............. 4-29
AI-022 (D/A CONVERTER, DSP)
Schematic Diagram....................................................... 4-31
AI-022 (POWER SUPPLY) Schematic Diagram ........... 4-33
AI-022 (IF CON) Schematic Diagram ........................... 4-35
FR-177, FL-118 Printed Wiring Boards and
Schematic Diagrams ..................................................... 4-37
HS16S9U Printed Wiring Board.................................... 4-39
HS16S9U Schematic Diagram...................................... 4-41
8. REPAIR PARTS LIST
8-1. Exploded Views ............................................................. 8-1
8-1-1. Case Assembly ........................................................ 8-1
8-1-2. Chassis Assembly.................................................... 8-2
8-1-3. Mechanism Deck Section ........................................ 8-3
8-2. Electrical Parts List ....................................................... 8-4
5. IC PIN FUNCTION DESCRIPTION
5-1. System Control Pin Function
(MB-86 Board IC102) .................................................... 5-1
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2. DISC REMOVAL PROCEDURE
(at POWER OFF)
1) Insert a tapering driver into the aperture of the unit bottom,
and move the lever of chuck cam in the direction of the arrow
A. (See Fig. 1)
2) Draw out the tray in the direction of the arrow B, and remove
a disc. (See Fig. 1)
Lever of chuck cam
Aperture
B
3. HOW TO SERVICE MB-86 BOARD
1) Remove the case from the set. (Refer to 2-1)
2) Remove the mechanism deck. (Refer to 2-2)
3) Remove the MB-86 board. (Refer to 2-3)
4) Set the CK-MD board as shown in Fig. 2.
4 Claw
1 Flexible board
(CN005)
5 CK-MD board
2 Flexible board
(CN001)
Tray
A
Fig. 1
3 Flexible board
(CN002)
Fig. 2
5) Set the MB-86 board as shown in Fig. 3.
1 MB-86 board
3 Two ground point
screws
– 5 –
2 Stand
Fig. 3
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DVP-S350
3-2. RF/SERVO BLOCK DIAGRAM
BASE UNIT
KHM-220AAA/J1N2
LD MODULE
DVD/CD
PD IC
DVD/CD
IC201 1 (DVD play)
200 mV/DIV 100 ns/DIV
536 mVp-p
MB-86 BOARD (1/5)
(SEE PAGE 4-11, 19, 21)
CN201
RF
7
9
A – D
10
16
17
8
E – H
11
15
18
VC
13
PD
4
LD
2
VR
5
IC201 1 (CD play)
500 mV/DIV 500 ns/DIV
880 mVp-p
1
9
ı
12
5
ı
8
13
ı
16
17
19
Q201
LD DRIVE
20
IC201 tf (DVD play)
500 mV/DIV 100 ns/DIV
IC201
DVD/CD RF AMP
DIGITAL SERVO
RF IP
A – D
A2 – D2
E – H
VC
PD
LD
LDON
25
1.5 Vp-p
SIGO
FE
TE
PI
MIRR
TZC
SCLK
SWD
SRD
SDEN
FDCHG
DFT
HOLD2
IC201 tf (CD play)
500 mV/DIV 500 ns/DIV
54
33VCI
40
39
29
26
32
43
ı
46
27
31
42
IC201 wl (DVD play)
200 mV/DIV 500 ms/DIV
1.5 Vp-p
IC201 r; (DVD play)
100 mV/DIV 50 ms/DIV
IC201 el (DVD play)
500 mV/DIV 50 ms/DIV
FE
TE
PI
SSDFCT
SSDFCTI
IC201 wl (CD play)
200 mV/DIV 20 ms/DIV
180 mVp-p
1.3 Vp-p
22
23
21
27
26
45
ı
48
41
34
ADC1
ADC0
ADC2
MIRR
TZC
GIO5 – 8
GIO11
DFCTI
IC201 r; (CD play)
500 mV/DIV 50 ms/DIV
860 mVp-p
IC201 el (CD play)
500 mV/DIV 200 ms/DIV
1.7 Vp-p
IC404 wd (DVD play)
500 mV/DIV 50 ms/DIV
1.4 Vp-p
IC404 wd (CD play)
500 mV/DIV 200 mV/DIV
1.7 Vp-p
IC404 ws (DVD play)
100 mV/DIV 50 ms/DIV
180 mVp-p
ADC4
19
ADC5
18
FGREF
31
9 8 12VRTA
VRBA
13
IC404 ws (CD play)
500 mV/DIV 50 ms/DIV
14
1
860 mVp-p
IC403 (2/2)
REFERENCE
VOLTAGE
GENERATOR
RF+
(DVD/CD) RF
MDS0
MDP0
LOCK
+3.3V
SIGNAL PROCESSOR
(SEE PAGE 3-5)
FOCUS
COIL
TRACKING
COIL
TILT
MM
MOTOR
INLIMIT
SENSOR
SPINDLE
MM
MOTOR
SLED
MM
MOTOR
MS-48 BOARD (SEE PAGE 4-6)
M001
LOADING
MM
MOTOR
CHUCK
S001
SENSOR
FCS
TRK
TIA, TIB
INLIM
SPM
SLA, SLB
1
2
3
5
PWM2
IC404
SERVO DSP
GIO0
72 73
PWM0, 1
GIO13
GIO14
HA 0, 1
HD 0 – 7
HINT
HCS
HWR
HRD
CLKIN
80
81
82
ı
84
86
ı
90
76
77
78
79
95
RS
68
HA 0, 1
HD 8 – 15
HA 0, 1
HD 8 – 15
SDSPINT
XSDSPCS
WRH
RD
27MSDP
XRST
XDRVMUTE
OCSW1
OCSW2
SYSTEM CONTROL
(SEE PAGE 3-9, 10)
5
6
448 mVp-p
IC403 (1/2)
TILT A1, B1
TILT MUTE1
SLDA1, B1
SPDL1
SPCNT1
LDMD1
LDFREE
7 17
1
3
5
7
53
54
49
32
ADC6
PDM 2, 3
PDM 0, 1
ADC3
GIO1, 2
GIO4
FGIN
71 55 39 38
Q203
IC401
FOCUS
COIL
DRIVE
TRACKING
COIL
DRIVE
TILT
MOTOR
DRIVE
SPINDLE
MOTOR
DRIVE
SLED
MOTOR
DRIVE
LOADING
MOTOR
DRIVE
14
15
20
28
29
12
13
11 20
22
25
30
15
29
22
25
20
30
12
28
IC402
2
3
4
5
32
ı
35
2
3
32
ı
35
4
5
19
20
21
22
CN202
10
ı
13
2
8
9
4
ı
7
CN401CN001
5
6
2
4
592 mVp-p
TRAY
S002
05
SENSOR
3
4
CKSW1
3-3 3-4