Teac A-650 - Auto-End Stop and Memory Functions; Auto-End Stop Facility Check; Memory Device Function Tests

5-13. AUTO-END STOP FACILITY CHECK
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5-14. MEMORY DEVICE FUNCTION CHECKS
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6. ELECTRICAL CHECKS AND ADJUSTMENTS
GENERAL NOTES
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The VTVM used in the procedures, including the
measurement at CAL test points, must have load im 
pedance of 1MQ or more.
To correctly complete these performance checks, keep
the order as explained in this chapter.
All checks and adjustments should be made with Top
Cabinet removed. (See Section 4-1).
For each procedure, make the initial equipment test
set up, connections and switch/control settings as
shown in the associated illustrations.
Each of the switch settings marked with hyphen ( — ) in
the Switch Setting chart have no effect on the proce 
dures.
MEMORY PLAY FUNCTION
Set the MEMORY Switch to PLAY.
Depress the Index Counter reset button, depress
Play Button to run the tape forward until the Index
Counter indicates 003 or higher (but less than 900)
then depress Rewind Button.
Check that the tape stops for a short moment when the
Counter reaches 999, then the Play mode begins auto 
matically.
Before performing adjustments on the amplifier sec 
tion of this deck, thoroughly clean and demagnetize
the entire tape path, particularly erase head, record/
playback head, capstan shaft and pinch roller.
Make sure the deck is set for the proper voltage for
your locality.
In general, checks and adjustments for other than spec 
ified items, are done in the sequence of left channel
then right channel. Double designated REF. NO. in 
dicates left channel/right channel (example: VR 101/
201).
Value of “ dB ” in tire text refers to 0 dB = 0.775 V,
except where specified. If a VTVM calibrated to 0 dB =
1 V is to be used, appropriate compensation should be
made.
MEMORY STOP FUNCTION
Place the Switch in the STOP position.
Set deck in the Rewind mode with the Counter indicat 
ing 003 or a larger numeral (but less than 900).
Check that the tape halts when the Counter winds back
down to 999.
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EJECT LEVER
During the Play, Record Pause or Record Mute mode,
ensure that the EJECT Lever cannot be depressed to
open the Cassette Holder.
The EJECT Lever can be depressed to open the Cas 
sette Holder from the STOP. Fast Forward or Rewind
mode.
When the EJECT Lever is depressed, be sure that the
Cassette Holder opens far enough, the lamp located at
the rear of the Cassette Holder is extinguished, the
Drive Motors stop and all control operations are
disabled.
Check that when the cassette reaches the end of tape
from each mode with the MEMORY Switch OFF.
the Take-up Reel stops rotating and the deck releases
the drive mechanism automatically.
The End-stop Activate Time (the time between the
stopping of the take-up reel table and stop mode of the
deck) should be 1.5 ± 0.5 seconds.
REC MUTE BUTTON
1. The Record Mute mode should be activated from only
the Record mode.
If the PAUSE, Play, Fast Forward, Rewind or STOP
Button is depressed, the Record Mute mode should be
disengaged.