Teac A 1340 Service Manual

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T E C A- 1340
A 4 CHANNEL SlMUL-TRAK
® STEREO TAPE DECK

SERVICE MANUAL

VEAC H r U.S. DISTRBIUTOR: :7. TEAC (IOORPAIHIONOF AMERICA

7733 TELEGRAPH ROAD

SALES OFFICE: SHINJUKU BUILDING MONTEBELLO, CALIFORNIA 90640
1-8-1, NISHIAsHINJUKU, SHINJUKU, TOKYO U.S.A.

TEAC HDNGKONG LIMITED ROOM N0, 1105 EUROPEAN DISTRIBUTOR: TEAC EUROPE B.V.

MAIN OFFICE: MELBOURNE PLAZA, 33 QUEEN'S ROAD C. KABELMEG 45-47, AMSTERDAM-N. 2.

HONG KONG HOLLAND

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1 GENERAL DESCRIPTION

l.
2.
3.

5.
6.
7.
8.
9.
10.
ll.

INDEX

GENERAL DESCRIPTION

SERVICE DATA

EQUIPMENT REQUIRED

PARTIAL DISASSEMBLY

HEAD REPLACEMENT AND ALIGNMENT -MECHANICAL-
MEASUREMENT AND ADJUSTMENT -MECHANICAL-
MEASUREMENT AND ADJUSTMENT -ELECTRICAL-
SIMPLIFIED DIAGRAM (WITH VOLTAGE READINGS)
PREVENTIVE MAINTENANCE AND WARRANTY
TROUBLE SHOOTING

PACKING FOR SHIPMENT

SCHEMATIC DIAGRAMS

PRINTED CIRCUIT BOARD AND PARTS LIST
EXPLODED VIEW AND PARTS LIST

MANUAL CHANGES

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25

i assume in a

RECORD LEVEL SET

OVERALL

The OUTPUT controls must be at the specified output level position
(-8 dB at OUTPUT jacks).

FREQUENCY RESPONSE

Apply a 400 Hz signal at -8 dB to the LINE IN jack.

Thread record test tape SCOTCH 203 on the unit, then set the REC
BIAS switch to HIGH position.

Place the unit in the 4 CHAN RECORD MODE with the MONITOR switch
in the TAPE position, LINE controls fully clockwise.

Adju'st FRONT VR-301/401, REAR VR-70l/801 for -8 dB signal at
OUTPUT jacks.

HIGH position

Thread a blank SCOTCH 203 tape on unit, place BIAS switch

at HIGH, tape SPEED at HIGH, MONITOR switch at TAPE.

Apply a signal swept from 50 Hz to 15 kHz at -23 dB to LINE IN
jacks and record it on the test tape.

Adjust FRONT L-301/401, REAR L-701/801 for best response.(Fig.7-9).

. Repeat above procedures for 3-3/4ips using a signal swept from

50 Hz to 7.5 kHz.

NORMAL position

5.

6.

Thread a blank SCOTCH 150 tape on the unit. Place BIAS
switch at NORMAL position, tape SPEED at HIGH.
Repeat overall response check at both speeds.

NOTE

If there is more than 2 dB difference in frequency response
between 2-channel and 4-channel operation, adjust L-901/902
at 10 KHz,7-l/2 ips.

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HIGH position NORMAL position

Fig. 7-9 Frequency Response limits -Record-

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9 PREVENTIVE MAINTENANCE

LUBRICATION INSTRUCTIONS

For maximum service life and optimum performance, lubricate the parts
listed below after every 2,000 hours of service. Use only a light
machine oil of good quality, such as TEAC'S TZ-262 or TZ-Z65.

Oil the motor through the oiling tube. Apply approximately lcc.
Apply 2 drops to the Idler Shaft bearings.

. Apply 2 drops to the Pinch Roller Shaft bearing.

. Apply 1 drop to the Index Counter relay pulley bearing.

. Apply a medium film of light machine grease to each roller surface
on the levers and cams. Avoid lubricating the brake areas.

U'ILUJNH

CAUTION
Do not over-lubricate. Wipe off all excess lubrication
with a cotton swab soaked in alcohol. Excess lubricating
fluids would be scattered during operation onto the rubber
components which deteriorate when soaked with oil.

Counter
Relay Pulley
O
I
O
0 :1 Drop Pinch Roller

mom.

Fig. 9-1 Lubrication Locations

29

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EXPLODED VIEW 2

A-I 340

ABOVE THE MAIN CHASSIS