Denon TU 660L Service Manual

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I l I , I | Hi-Fi AM-EM Stereo Tuner

- SERVICE MANUAL
MODEL TU-BED/BBDL

TU-660

Z-BAND (AM-FM) STEREO TUNER
TU-660L '

3-BAND (LW-MW-FM) STEREO TUNER

CONTENTS

OPERATING INSTRUCTIONS
USA. AND CANADA VERSION
EXCEPT USA. AND CANADA VERSION

BLOCK DIAGRAM ............................................. 14
REMOVAL OF EACH SECTION 15
METHOD OF ADJUSTMENTS . 16,17
SEMICONDUCTORS 18
NOTE FOR PARTS LIST ......................................................................................................................................... 19
PRINTED WIRING BOARD PARTS LIST

1U-1950 TUNER UNIT (2 Band BIack Version Pans Lits) ......................................................................... 19~21

1U-1950 TUNER UNIT (3 Band Black Version Parts Lits) ................................................................................ 21
PRINTED WIRING BOARD (Pattern Side)
IU-IQSO TUNER UNIT (for 2 Band Model) 22

1U-1950 TUNER UNIT (for 3 Band Model) ...... I. 22
EXPLODED VIEW OF CHASSIS AND CABINET . 24
PARTS LIST OF EXPLODED VIEW ................... .. 25

WIRING DIAGRAM
SCHEMATIC DIAGRAM (for2 Band Model)
SCHEMATIC DIAGRAM (for3 Band Model) 28

NIPPON COLUMBIA CO.. LTD.

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_ TLJ-SBD/BBOL

RISK OF ELECTRIC SHOCK

' DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (0R BACK). NO USER SERVICE-
ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL.

The lightning flash with arrowhead symbol, within an equilateral triangle,
is intended to alert the user to the presence of uninsulated "dangerous
voltge within the product's enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE T0 RAIN OR MOISTURE.

CAUTION

ATTENTION

TO PREVENT ELECTRIC SHOCK DO NOT USE THIS (POLA-
RIZED) PLUG WITH AN EXTENSION CORD, RECEPTACLE OR
OTHER OUTLET UNLESS THE BLADES CAN BE FULLY IN-
SERTED TO PREVENT BLADE EXPOSURE

POUR PREVENIR LES CHOCS ELECTRlOUES NE PAS UTILISER
CET'I'E FICHE POLARISEE AVEC UN PROLONGATEUR UNE
PRISE DE COURANT 0U UNE AUTRE SORTIE DE COURANT,
SAUF SI LES LAMES PEUVENT ETRE INSEREES A FOND SANS
EN LAISSER AUCUNE PARTIE A DECOUVERT.

SAFETY INSTRUCTIONS

1. Read Instructions - All the safety and operating
instructions should be read before the appliance is
operated.

2. Retain Instructions - The safety and operating
instructions should be retained for future reference.

3. Heed Warnings -- All warnings on the appliance and
in the operating instructions should be adhered to.

4. Follow Instructions - All operating and use instruc-
tions should be followed.

5. Water and Moisture - The appliance should not be
used near water ~ for example, near a bathtub,
washbowl, kitchen sink, laundry tub, in a wet
basement, or near a swimming pool, and the like.

6. Carts and Stands - The appliance should be used
only with a cart or stand that is recommended by the
manufacturer.

6A. An appliance and
cart combination
should be moved
with care. Quick
stops, excessive
force, and uneven
surfaces may cause
the appliance and cart combination to overturn.

7. Wall or Ceiling Mounting - The appliance should be
mounted to a wall or ceiling only as recommended
by the manufacturer.

8. Ventilation - The appliance should be situated so
that its location or position does not interfere with its
proper ventilation. For example, the appliance
should not be situated on a bed, sofa, rug, or similar
surface that may block the ventilation openings; or,
placed in a builtvin installation, such as a bookcase or
cabinet that may impede the flow of air through the
ventilation openings.

9. Heat - The appliance should be situated away from
heat sources such as radiators, heat registers,
stoves, or other appliances (including amplifiers)
that produce heat.