Test Equipment Required; Pinch Roller Pressure - Teac A-400 Service Manual

TEST EQUIPMENT REQUIRED
For fast forward and
rewind torque checks: 0 ~ 160 g-cm
* Use of the Cassette Torque Meter instead of the spring scale, if you have one,
is recommended for easier measuring, (See Fig. 19 on Page 11)
Fig. 13 Spring Scale and Cassette Reel Adapter
5, Spring scale (for the Pinch Roller pressure check):
O~1kg (2.2 Ibs)
6. TEAC MTT-111 test tape: For tape speed and wow/flutter checks
7. Wow/Flutter meter:
MEGURO DENPA SOKKIK.K. Model MK-668A, D & R Co., FL- ae or equivalent:
8. Frequency counter:
Digital type, capable of 10 Hz to 100 kHz indica-
tion.
NOTE
All the mechanical checks and adjustments should be done with
the Cabinet and the Front Panel removed. (See Section-2-1, 2-2)
PINCH ROLLER PRESSURE
The Pinch Roller pressure should be: 400 g + 20 g- (13. 5 as
15.0 oz)
Open the Cassette Holder door to the left.
Switch the POWER switch to the ON position.
Place the deck in the PLAY mode with no tape loaded.
Attach the spring scale to the Pinch Roller shaft as shown in
Fig. 14.
Gently draw-the scale away (in the direction of the arrow)
until the Capstan shaft and the Pinch Roller are completely
separated.
Gradually release the tension on the scale until the Pinch
Fe Oe
the Pressure Spring by bending the tab of the Pinch Roller
Assy slightly.