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1-3.
NOTE ON REPAIRING
NOTE
ON REPAIRING
1.
This set does not change playback level when
TAPE SELECT
switches are changed.
The LINE OUT signal is cut when REC MONI-
TOR MUTE
switch (S607) on the rear panel is
turned
ON
except when MONITOR
switch is
in TAPE position in playback mode.
If TIMER
switch
is previously
set
to
ON
position,
it may
happen
to erase
test
tapes
because
the set becomes automatically in the
auto playback (awakening) or auto record mode
determined
by
REC
MODE
switch
position
when POWER
switch is turned ON.
PB LEVEL
controls on the front panel control
LINE OUT and HEADPHONES
levels, and also
VU meters indicate the amount of PB LEVEL
controlling.
When PB LEVEL
is in the center-
click positions, LINE OUT
levels are standard
0.44V
(-5dB)
and VU
meters
indicate
''0''.
When
PB
LEVEL
controls
are
in their full-
clockwise stops, LINE
OUT
levels are 0.775 V
(OdB).
Three
kinds
of hexagonal-socket
screwdrivers
are
needed
for
the
following
adjustment/
removal.
Screwdriver
Adjustment/removal
Tension-arm pin
Intermediate pin
Switch knob
Switch lever
Head azimuth
FG-holding boss
Control knob
Motor pulley
Reel drum
| TC-766-2
1TC-766-2
|
Reel Panel Removal:
Amp Panel Removal:
Perforated Panel (top) Removal:
Perforated Panel (bottom) Removal:
Tape BIAS/EQ recommendations
The
following
list shows
the
recommended
settings, which have been determined
through
critical listening tests and electrical character-
istic measurements
on
commercially
available
tapes.
The setting can be changed according to
the personal
preference.
For Sony tapes, be
sure to use the recommended settings to obtain
the optimum tape characteristics.
NORMAL
SPECIAL
Fe-Cr
BASF LH, LHS
SCOTCH #211,
SONY PR
AGFA PE, PEM
#212, #213
MEMOREX
AMPEX 406, 407
SONY SLH
SONY DUAD
SCOTCH CLASSIC
|SCOTCH #206,
TDK AUDUA
#207
MAXELL UD
SCOTCH #218
SCOTCH #250
SECTION
2
DISASSEMBLY
(to Mechanical Adjustment)
(to VU Meter and Variable Resistor Replacement)
(to Fuse Replacement)
(to Audio Amp Board Check)
(to Tape Speed and Forward Torque Adjustments)
(to B+ and Supply Reel Back Tension Adjustments)
(to System Control Board Checking)
8286000
28828000
9 eS 2
Side Board (right) Removal:
Side Board (left) Removal:
Rear Board Removal:
RK 3x8
washer
2]
reel panel washer
RK 3x8
reel panel
washer
1]
reel panel washer
S
o|
RK3x8 gf
amp panel
)
® elt
side board (right)
perforated panel
(bottom
foot ass'y
washer
7 { B4x10 fl
rear board
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