Sony MX-E501 User Manual

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1. SERVICING NOTE ···················································· 3

2. GENERAL ·································································· 4

3-1. Case Assy, Holder Assy ·················································· 5
3-2. Mechanism Deck ···························································· 6
3-3. Bracket Assy ··································································· 6
3-4. Main Board ····································································· 7
3-5. Optical Pick-up Assy (LCX-4E) ····································· 7

4. TEST MODE ······························································ 8

5. ELECTRICAL ADJUSTMENTS ··························· 12

6-1. Block Diagram ······························································ 17
6-2. Printed Wiring Board – Main Section (Side A) – ········· 18
6-3. Printed Wiring Board – Main Section (Side B) – ········· 19
6-4. Schematic Diagram – Main Section (1/3) – ·················· 20
6-5. Schematic Diagram – Main Section (2/3) – ·················· 21
6-6. Schematic Diagram – Main Section (3/3) – ·················· 22
6-7. IC Block Diagrams ······················································· 23
6-8. IC Pin Function Description ········································· 25

7-1. Main Section ································································· 31
7-2. Mechanism Deck Section ············································· 32

8. ELECTRICAL PARTS LIST ·································· 33

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.

Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

! OR DOTTED LINE WITH

!ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.