Tools For Testing And Maintenance - Teac A-3440 Service Manual

2-2 SERVICE DATA —MECHANIAL—
Tape Speed Deviation and Drift
Wow and Flutter
Pinch Roller Pressure
Reel Torque
3000 Hz +30 Hz, within 15 Hz
Playback: 0.10% (WRMS) at 15 ips
0.12% (WRMS) at 7% ips
0.15% (RMS) at 15 ips
0.18% (RMS) at 7% ips
2.2 kg (4.8 Ibs)
Take-up: LARGE 770 to 830 g-cm (11 to 12 oz-inch)
SMALL 370 to 410 g-cm (5.2 to 5.7 oz-inch)
Back Tension: LARGE 330 to 390 g-cm (4.6 to 5.5 oz-inch)
Overall:
F.F./REW Torque
Brake Torque
F.F./REW Time
2-3 SERVICE D
Frequency Response
Signal-to Noise Ratio
Erase Efficiency
Stereo Channel Separation
SIMUL-SYNC Chann
SIMUL-SYNC Crosstalk
Total Harmonic Distortion
1400 to 1800 g-cm (20 to 25 oz-inch)
SMALL 180 to 220 g-cm (2.5 to 3.1 oz-9nch)
2000 g-cm or more (28 0z-inch)
140 seconds for 1800 ft tape
ATA —ELECTRICAL—
Refer to Frequency Response Limits charts on page 18, 20 and 22.
Overall:
45 dB at 15 ips
46 dB at 7% ips
Playback: 50 dB at both speeds
SIMUL-SYNC: 40 dB at both speeds
65 dB at 1 kHz signal
(Meadurement with input 10 dB higher than the specified Input
level)
el Separation
Overall:
40 dB channel to channel at 1 kHz signal
45 dB channel to channel at 1 kHz signal
8 dB, or more.
1.0% at 1 kHz signal at 0 VU
NOTE: Asa result of containing changes and improvements during the production run, minor differences
may be found between early and later machines.
Value of "dB" in this manual refers to 0 dB = 0.775 V.
3. TOOLS FOR TESTING AND MAINTENANCE
A minimum of the following tools and test instruments are required for measuring and adjusting to obtain optimum
performance. Regular maintenance tools will be adequate
is not available, a close equivalent can be used.
SPRING SCALE:
FLUTTER METER:
DIGITAL COUNTER:
BANDPASS FILTER:
VTVM (AC):
AF OSCILLATOR:
ATTENUATOR:
OSCILLOSCOPE:
BLANK TAPE:
0—4 kg (O0—8 Ibs)
0-300 g (0-10 oz)
Meguro Denpa Sokki K.K.,
Model MK-668C
Range; 0 Hz—100 kHz
TEAC MODEL M-206A (1 kHz)
Hewlett-Packard Co., Model 400E
10 Hz—100 kHz
General purpose
General purpose
TEAC YTT-8013
for those not listed here. If any test instrument listed here
TEAC TEST TAPE:
TEAC EMPTY REEL:
TOOLS:
DEMAGNETIZER:
YTT-1004 (15 ips), YTT-1003
(7% ips) for Playback Alignment test.
YTT-2002 (7% ips), YTT-2004
(15 ips) for Tape Speed and Wow
and Flutter test.
RE-702 (2.5" dia. hub)
RE-701 (4" dia, hub)
2 mm nut driver, Hex Head Allen
Wrench, Plastic alignment tool,
Load resistor non inductive type
4 ohm/1 W.
TEAC E-3 or equivalent.