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Extracted text from sony d nf 421 service manual (Ocr-read)
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D-NF420/NF421
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 the 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
e xposure.
. O T E S O N T H E ! # P O W E R A D A P T O R
s $ I S C O N N E C T A L L P O W E R S O U R C E S W H E N T H E P L A Y E R I S
N O T T O B E U S E D F O R A L O N G T I M E
s 5 S E O N L Y T H E ! # P O W E R A D A P T O R S U P P L I E D ) F Y O U R P L A Y E R I S N O T S U P P L I E D W I T H T H E O N E U S E A N
! #
% ( ' ! # P O W E R A D A P T O R N O T A V A I L A B L E I N
! U S T R A L I A n A N D ! R G E N T I N A ) F Y O U U S E A N Y O T H E R ! #
P O W E R A D A P T O R M A L F U N C T I O N M A Y O C C U R
0 O L A R I T Y O F T H E P L U G
s $ O N O T T O U C H T H E ! # P O W E R A D A P T O R W I T H W E T H A N D S
s # O N N E C T T H E ! # P O W E R A D A P T O R T O A N E A S I L Y A C C E S S I B L E ! # O U T L E T 3 H O U L D Y O U N O T I C E A N
A B N O R M A L I T Y I N T H E ! # P O W E R A D A P T O R D I S C O N N E C T I T
F R O M T H E ! # O U T L E T I M M E D I A T E L Y
TABLE OF CONTENTS
1. SERVICING NOTES
................................................ 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Cabinet (Lower), Upper Lid Sub Assy ............................ 7
3-3. JACK Board, Optical Pick-up Assy (CDM-3325ERV2) . 8
3-4. SWITCH Board (Except PSYC Model) .......................... 8
4. ELECTRICAL ADJUSTMENT ............................. 9
5. DIAGRAMS
5-1. Printed Wiring Board - EGL Board - ............................ 12
5-2. Schematic Diagram - EGL Board - ............................... 13
5-3. Printed Wiring Board - JACK Board (Component Side) - ................................ 14
5-4. Printed Wiring Board - JACK Board (Conductor Side) - .................................. 15
5-5. Schematic Diagram - JACK Board - ............................. 16
5-6. Printed Wiring Board - SWITCH Board (Except PSYC Model) - .................... 17
5-7. Schematic Diagram - SWITCH Board (Except PSYC Model) - .................... 18
6. EXPLODED VIEWS
6-1. Upper Lid Sub Assy Section (PSYC model) ................... 27
6-2. Upper Lid Section (Except PSYC model) ....................... 28
6-3. Cabinet (Lower) Section .................................................. 29
6-4. Optical Pick-up Section (CDM-3325ERV2) ................... 30
7. ELECTRICAL PARTS LIST .................................. 31
