Read Sony ICF-CD853V Service Manual online
2
ICF-CD853V
About CD-Rs/CD-RWs
This unit is compatible with CD-Rs/CD-RWs but
playback capability may vary depending on the
quality of the disc, the recording device and
application software.
This unit is compatible with CD-Rs/CD-RWs but
playback capability may vary depending on the
quality of the disc, the recording device and
application software.
TABLE OF CONTENTS
1.
SERVICING NOTES
..............................................
3
2.
GENERAL
..................................................................
4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
5
3-2. Rear Cabinet Assy ...........................................................
6
3-3. CD Lid .............................................................................
6
3-4. Upper Cabinet Assy ........................................................
7
3-5. MAIN Board ...................................................................
7
3-6. CD Block .........................................................................
8
3-7. Optical Pick-up Device (KSS-213R) ..............................
8
4.
ELECTRICAL ADJUSTMENTS
Tuner Section .................................................................
9
CD Section ..................................................................... 11
5.
DIAGRAMS
5-1. Block Diagram – CD Section – .................................... 12
5-2. Block Diagram – MAIN Section – ............................... 13
5-3. Note for Printed Wiring Board and
5-2. Block Diagram – MAIN Section – ............................... 13
5-3. Note for Printed Wiring Board and
Schematic Diagrams ....................................................... 14
5-4. Printed Wiring Board – CD Section – .......................... 16
5-5. Schematic Diagram – CD Section – ............................. 17
5-6. Printed Wiring Board – MAIN Section – ..................... 18
5-7. Printed Wiring Boards – POWER Section – ................ 19
5-8. Schematic Diagram – MAIN section (1/2) – ............... 20
5-9. Schematic Diagram – MAIN section (2/2) – ............... 21
5-10. Printed Wiring Boards – PANEL Section – ................. 22
5-11. Schematic Diagram – PANEL Section – ...................... 23
5-12. IC Pin Function Description .......................................... 25
5-5. Schematic Diagram – CD Section – ............................. 17
5-6. Printed Wiring Board – MAIN Section – ..................... 18
5-7. Printed Wiring Boards – POWER Section – ................ 19
5-8. Schematic Diagram – MAIN section (1/2) – ............... 20
5-9. Schematic Diagram – MAIN section (2/2) – ............... 21
5-10. Printed Wiring Boards – PANEL Section – ................. 22
5-11. Schematic Diagram – PANEL Section – ...................... 23
5-12. IC Pin Function Description .......................................... 25
6.
EXPLODED VIEWS
6-1. Cabinet Section ............................................................... 26
6-2. Upper Cabinet Section .................................................... 27
6-3. Front Cabinet Section ..................................................... 28
6-4. Rear Cabinet Section ...................................................... 29
6-5. Optical Block (KSM-213RDP) ....................................... 30
6-2. Upper Cabinet Section .................................................... 27
6-3. Front Cabinet Section ..................................................... 28
6-4. Rear Cabinet Section ...................................................... 29
6-5. Optical Block (KSM-213RDP) ....................................... 30
7.
ELECTRICAL PARTS LIST
.............................. 31
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 PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check 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.
ing safety check 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 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
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
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
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 ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
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
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
other than those specified herein may result in hazardous ra-
diation exposure.
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