Item
Connection
of
instrument
Line
output
Test
tape
Output
Indicator
Adjustment
point
Adjust
Remark
Mode
1
Tape
speed
Frequency
counter to
LINE output
terminal
MTT-111N
or
TCC-111
PB
R802 (H.S.)
R803 (N.S.)
DECK
:
A
R817 (H.S.)
R818 (N.S.)
High speed
6000-6020Hz
Normal speed
3000-3010Hz
High speed
first.
Refer to item
FT MODE
2
Head
azimuth
AC voltmeter
and oscilloscope
to LINEoutput
terminal
TCC-153
or
MTT-114N
PB
Head azimuth
screw
FWD: right
REV: left
Maximum and
same phase
at channels
Lch and Rch
3
Playback
level
AC voltmeter
to terminals
P205
MTT-150
or
TCC-130
PB
R117 (Lch)
R118 (Rch)
DECK:
A
300mV
R119 (Lch)
R120 (Rch)
(See to remarks)
DECK:
B
4
OSC
block
Frequency
counter to
P102 ,read
loose coupling
METAL
tape
REC Frequency
counter
L403
85KHz±1KHz
5
Bias current
1KHz,-23dB
and 12KHz,
-23dB
Normal
tape
REC
/PB
R403 (Lch)
-0.5 to +1.0dB
at 1KHz and 12KHz
R404 (Rch)
6
Record
level
1KHz
350mV
Normal
tape
REC
/PB
R225 (Lch)
same level
at REC/PB
AC
voltmeter
R226 (Rch)
FT MODE
Test mode will be alive when P705 FTconnect to GND.
When pressed the PLAY key in the same direction as that for replay while replaying,the tape speed
will be increase to high speed. And if pressed the same key while running at high speed, the speed
will be set back to normal one.
Standard Tape
NORM:UD-1 HIGH:UD-2 METAL:TCC403A
AC
voltmeter
AC
voltmeter
AC
voltmeter
Frequency
counter
B
DECK:
P705
FT GND TEST
L GND R
P205
TA-RW255
ADJUSTMENT PROCEDURE
R803
R802
High speed ADJ
Normal speed ADJ
DECK A
R817 R808
DECK B
High speed ADJ
Normal speed ADJ
L ch
R ch
R403
R404
R118
R120
DECK A
DECK B
Playback Level
BIAS ADJ
R117
DECK A
R119
DECK B
Playback Level
P205
L
GND
R
TP-1
L403
R225
REC_Level
L ch
R226
REC_Level
R ch
PC BOARD LAYOUT
NAAF-8555
Front
side
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QQ 376315150
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299