Sony TC-WR690 - Relay Playback; Playing Both Decks Sequentially

TC-WR690/WR790
SECTION 3
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured alcohol-
moistened swab:
record/playback/erase head pinch roller
rubber belts idlers
capstan
2. Demagnetize the record/playback head with a head
demagnetizer.
(Head demagnetizer do not approach for the erase head.)
3. Do not use a magnetized screwdriver for the adjustment.
After the adjustments, apply suitable locking compound
to the parts adjusted.
5. The adjustments should be perfomed with the rated
power supply voltage unless otherwise noted.
Torque Measurement
so in
——
rere
SECTION 4
ELECTRICAL ADJUSTMENTS
PRECAUTION
1. The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
2. The adjustment and measurement should be performed
for both L-CH and R-CH.
@ Switch position
DOLBY NR switch : OFF
DIR MODE switch :2
@ Standard record position
Deliver the standard input signal level to input jack and
set the REC LEVEL control to obtain the standard
output signal level as follows.
—Record Mode-—
AF OSC
LINE IN LINE OUT
Standard Input Level
Input terminal LINE IN
025 (10a
Standard Output Level
Output terminal LINE OUT
load impedance 47kQ,
output signal level 0.44V (—5dB)
Test Tape
P-4-A100 10kHz, —10dB
P-4-L300 315Hz, 0dB
WS-48B 3kHz, 0dB
Azimuth Adjustment
Level Adjustment
Tape Speed Adjustment