HEAD AZIMUTH ADJUSTMENT (DECK 1/2)
1. Playback the azimuth adjustment portion (8kHz,.. -20dB)
of the test tape (QZZCFM). Vary the azimuth adjusting screw
until the output of the R-CH are maximized.
2. Perform the same adjustment in the play mode.
3. Repeat the same check in reverse play mode.
4. After the adjustment, apply screwlock to the azimuth adjust-
ing screw.
TAPE SPEED ADJUSTMENT (DECK 1/2)
Normal speed
1. Playback the middle portion of the test tape (QZZCWAT).
2. Adjust Deck 1=VR3 and Deck 2=VR2 so that the output is
within the standard value.
Standard value: 3000:t15Hz (NORMALspeed)
High speed [Set the unit to forward (FWD) mode.]
3. Press the tape-to-tape recording-speed selector switch (X2)
button.
This will set the high speed mode.
4. Playback the middle portion on the test tape (QZZCWAT).
5. At that time, check if the output from DECK 1 is within the
standard value.
Standard value: 6000:t600Hz (HIGH speed)
6. Adjust VR1 so that the output frequency of DECK 2 is within
:t30Hz for the value of the output frequency of DECK 1.
IRS-TRS
EVM
Fig. 1
E. HEAD RIP.HEAD
~
Azimuth Screw Azimuth Screw
(Forward) (Reverse)
Fig. 2
LINEOUT
0 j---1~
0 0 ---l_- <>_0
OigitallreQuency
counler
Fig. 3
PLAYBACK GAIN ADJUSTMENT (DECK 1/2)
1. Set the AF oscillator's output frequency to 315Hz.
2. With no tape loaded in the deck, press and hold the
REC button on DECK2(or DECK1). Adjust the test signal level
using the Rec. Level and Balance controls until the line
output levels on both channels are 320mV. When the
adjustment is complete, release the REC button. (The deck
stores the data at the moment the REC button is released.)
3. Load the test tape (QZZCFM) into the deck and locate
the part where the playback gain test tone (315Hz, OdB) is
recorded. Pressthe ATC button, then the FWDPLAYbutton.
(At this
point the deck automatically adjusts the playback
gains on both forward and reverse sides.) After this, play
back the tape and verify that the output level falls in the
specified range.
4. Perform the adjustment described in step 3 above for both
DECK1and DECK2.
I Standardvalue:320mV:tO.5dB I
~ ,.,~ ",'"", ~
0 ~ t --
0 ..r ~ :_uu_- -- ~-- j'@)~
AFo$Cillata< EVM
Fig.4
To Next Page
