Sony TC-730 Service Manual page 27

VTVM
R416 (RCH forward run)
Switch Setting:
Specification:
both L-CH and R-CH in forward and reverse
modes.
7. Playback
Test Setup:
Set the TAPE
SPEED switch to 19cm/s{7-1/2 ips).
Equalizer
-2.5~,—1.5 dB against NORMAL
SPECIAL
djust t ae
of SONY alignment tape J-19-F2.
Switch Setting:
Adjust R319, R320, R419 and R420 so that the
playback output of the 3rd tone is the same as
Specification:
that of the 2nd tone.
R319 (L-CH forward run)
R419 (R-CH forward run)
at 19 cm/s tape speed with J-19-F2 R320 (L-CH reverse run)
Se CCE Poe
10 kHz Play back the 4th (12.5 kHz), Sth (7 kHz), 6th
+3 dB +5 dB (80 Hz) and 7th (40 Hz) tones of SONY alignment
+2dB | +2¢B +2dB
[R tape J-19-F2 in order.
Make sure that the each deviation against 410 Hz
MONITOR switch
Deviation against 400 Hz of 2nd tone
of 2nd tone is within specification shown in the
left table.
Set the TAPE SPEED switch to 9.5en/s
at 9.5 cm/s tape speed with J-9-F!
(3-3/4 ips).
4th Sth 6th 7th
Play back the 3rd (400 Hz) and 4th (5 kHz)to nes
SkHz | 3kHz 200 Hz
80 Hz
of SONY alignment tape J-9-F 1.
Adjust R321 and R421 so that the playback ot put
of the 4th tone is the same as that of 3rdtone.
R321 (L-CH forward run)
R421 (R-CH forward run)
First, 19cm/s (7-1/2 ips) equalizer adjustment
in order.
Make sure that the each deviation agains 3rd
(4C0 Hz) tone is within +2 dB as shown n_ the
left table.
Level difference between the forward and
reverse modes should be within 1 dB.