Harman Kardon DC5300 User manual

The Harman Kardon
Model DC5300
DUAL CASSETTE DECK
Manual 177A
echnical Manual
The following marks found in the parts list of this manual
identify the models as follows.
> : North America area model Black version
@ : international model Black version
: Australia model Black version
CONTENTS
SPECIFICATIONS Qu... ce eeescsccsssceccccssscsecceccccsescees GENERAL UNIT uuu. ce ce eeecsecccecnssescccecscecacsseces 8
LEAKAGE TEST .uc.cccccccccccccccscccessseccceesecescseteceeceuees GENERAL UNIT PARTS LIST wn... ccc ccceecccceeesees 9
CONTROLS AND FUNCTIONS ...2.........ccseeeseeeeees CASSETTE TAPE PLAYER/RECORDER
DISASSEMBLY PROCEDURES .........ceccccsseeccceees MECHANISM, PARTS LIST .....cceecccccccececcecececcees 9
POWER CORD REPLACEMENT ........ccccccceerecorcees WIRING DIAGRAM ............cceccsccsseccccassceeccneesacces 10
BLOCK DIAGRAM u....ecccccssccssccscccscccssccsecacescessceaes P2 CZ BOARDS 2525085 cesceaceceetssed aoc iacé odecaghoteanaviaes 11
CIRCUIT DESCRIPTION uu... cc. c.cccccecccscssccsessscceese ELECTRICAL PARTS LIST ...2........00seessccossseceueeee 13
TIMING CHART. .0.......cccccccsscccssscccesssccssecucscecerenscces IC BLOCK DIAGRAM .........cccccseeccnescccescccseseccseres 20
ALIGNMENT PROCEDURES ...........eccccccececeueeceeee SCHEMATIC DIAGRAM Seeddsatesvesisiniveaecdesteew ee 23
harman/kardon
Parts and Service Office ;
240 Crossways Park West,Woodbury,N.Y. 11797
1112-0010A152 P-129109 2000 Printed in Japan
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SPECIFICATIONS
Nominal Limit
4-track 2 Channel Stereo
Cassette Deck
Track Configuration
+ MECHANICAL SECTION
Record/Playback Tape Speed
Drift 4.75 cm/sec. 0.2% < 2.0%
Heads (Primary/Secondary) 2/1
Wow and Flutter NAB 0.05% < 0.1%
CCIR 0.08%
Take Up Torque 50 gr.cm 35-70 gr.cm
Back Tension 2 gr.cm 2-6 gr.cm
F.FWD Torque 100 gr.cm 70 — 150 gr.cm
_ Rew Torque 100 gr.cm 70 -— 150 gr.cm
F.FWD/Rew Time 85 sec. < 100 sec.
(C-60 Tape)
« AMPLIFIER SECTION
Record/Playback Frequency
Response (at -3 dB) LN 20-18 kHz 20-17 kHz
CrO2 20-18kHz 20-17 kHz
Metal 20-18kHz 20-17 kHz
Copy Mode Frequency
Response LN 40 - 16 kHz 40 - 15 kHz
CrO2 40-16kHz 40-15 kHz
Metal 40 - 16 kHz 40 - 15 kHz
105 kHz +5 kHz
620 mV £1.5 dB
Bias Frequency
Playback Output
Signal-to-Noise Ratio
(at Line Input)
(Input 1 kHz, 100 mV)
IHF-A WTD (at Dolby level)
Dolby NR off LN 51 dB
CrO2.- 54 dB
Metal 54dB
Dobly B NR LN 61 dB
CrO2 64 dB > 60 dB
Metal 64 dB > 60 dB
Nominal Limit
Dolby C NR LN ~ =66dB
CrO2 70dB > 66 dB
Metal 70 dB 2 66 dB
Channel Separation 45 dB 235 dB
Crosstalk 70 dB 2 60 dB
Record/Playback Distortion
(Input 1 kHz)
LN 0.9% $ 2.0%
CrO2. 1.3% s 3.0%
Metal 1.1% s 2.0%
MPxX Filter Attenuation
at15kHz 0.3dB <1dB
at19 kHz 35dB 2 30dB
Erase Ratio (Input 80 Hz)
LN 70 dB 2 60 dB
Metal 61 dB 256 dB
Input Sensitivity
(Input 1 kHz) at Line Input 43 mV 30-80 mV
Input Impedance
(Input 1 kHz) at Line Input 23 kQ 15 - 25 kQ
» DIMENSIONS (WxHxD) 17-3/8" x 5” x 12-5/8"
(443 x 134 x 342) mm
¢ WEIGHT 17.2 Ibs (7.8 kg)
¢ POWER SUPPLY
U.S.A. and Canada models
Internationa! model
AC120V, 60 Hz
AC230V/240V, 50/60 Hz
¢ POWER CONSUMPTION
U.S.A. and Canada models 29 W
International model 31W
These specifications are service target specs.
Specifications and components are subject to change without notice.
Overall performance will be maintained or improved.
LEAKAGE TEST (FOR SERVICE ENGINEERS IN THE U.S.A)
Before returning the unit to the user, perform the
following safety checks:
1. Inspect all lead dress to make
certain that leads are not pinch-
ed or that hardware is not lodged
between the chassis and other
metal parts in the unit.
2. Replace all protective devices
such as nonmetallic control
knobs, insulating fishpapers,
cabinet backs, or shields, isola-
tion resistorcapacitor networks,
mechanical insulators, etc.
3. Be sure that no shock hazard exists; check for
leakage current using Simpson Model 229 Leakage
Tester, standard equipment item No. 21641, RCA
Model WT540A or use alternate method as follows:
Plug the AC line cord directly into a 120-volt AC
receptacle (do not use an Isolation Transformer for
this test). Using two clip leads, connect a 1500 ohm,
10-watt resistor paralleled by a 0.15mF capacitor, in
series with all exposed metal cabinet parts and a
known earth ground, such as a water pipe or conduit.
Use a VTVM or VOM with 1000 ohms per volt, or
higher sensitivity to measure the AC voltage drop
across the resistor.(See Diagram.) Move the reisistor
connection to each exposed metal part having a return
path to the chassis (antenna, metal, cabinet, screw
heads, knobs and control shafts, escutcheon, etc.) and
measure the AC voltage drop across the resistor. (This
test should be performed with the power switch in
both the On and Off positions.)
TO EACH EXPOSED
METAL SURFACE OF
UNIT UNDER TEST
SIMPSON MODEL 229 ETC. FOR
LEAKAGE TEST
TO AC GROUND SUCH
AS WATER PIPE,BX CABLE,
CONDUIT, ETC.
HIGH GROUND
VOLTAGE LEAD
OR +LEAD
VTVM
© AC SCALEO
TEST PROBE
CONNECT TO KNOWN
EARTH GROUND
TO EXPOSED
METAL PARTS
A
reading
of
0.35
volt
RMS
or
more
is
excessive
and
indicates
a
potential
shock
hazard
which
must
be
corrected
before returning the unit to the owner.

CONTROLS
AND
FUNCTIONS
Direction
Mode
Selects one way, reverse, Input Balance
or continuous transport Adjusts recording balance of
mode. left and right channels
Fine Trim
Input Level Adjust when recording.
Adjusts recording level.
Power Switch PRI/SEC Transport Selector
Press to turn unit on/off. Selects which transport (either
Primary or Secondary) is to be
operated by the transport
controls.
arman/kardon DC5300 onda! Cassette Deck
Power
PRI %
<d< PP R
Stop
ug
RECORD MPx ! {4 [op conte wi spo
Stops
tape
movement.
no
Bc
j
1
CE
cory
oo
ac
MEMORY di ake EDIT =MEMORY
Reverse Play .
Begins playback or recording in : ! a : J,
reverse direction. I } ‘ i vel inpuMatance ias Mie Tom ry Ti
Rewind
Rapidly ane = SSC tape.
Eject f 0 é 7 sync
Press to load/remove tape : REVERSE
cassette in Primary transport.
Rec/Pause
Puts cassette deck in Record-
ready
or
Pause
mode.
Dolby
NR
#
Memory
Eject
Selects
Dolb
Press
on:
when
<@<q@
is
pressed,
J
——$———
y
on/off,
Dolby
fape
rewind
to
approximatel
Press
to
load/remove
tape
Play
B
mode,
or
Dolby
C
mode.
Hest
on
aunt
sa
pneey,
cassette
in
Secondary
transport.
Begins
playback
or
Fast
Forward
MPX
Filter
ener
Reset
recording.
Rapidly
advances
tape.
Rec
Mute
Press
when
using
Dolby
noise
Resets
Counter
to
Inserts
blank
space
when
reduction
while
recording
FM
00:00.
recording. stereo broadcasts.
PRI
Iluminates when Primary tape
transport is currently operated by the
transport controls.
SEC
llluminates when Secondary tape transport is
currently operated by the transport controls.
LEVEL
MPX Shows signal level.
Indicates MPX Filter is
engaged.
<<>> 18
Displays operating mode of transport:
Record, Forward Play, Reverse Play,
Fast Forward, Rewind, Pause, Stop.
<<>pP ile
Displays operating mode of
transport: Record, Forward Play,
Reverse Play, Fast Forward,
B -35 -20 -10 -7 -5 -3 -1 OO +1 43 +5 48 Rewind, Pause, Stop.
RECORD a
Illuminates when transport is i
Record mode.
RECORD MPX | | | | | | CONT HISPD
DO
Bc
Oo
BC
4
DO
Bc
illuminates if Dolby B or MEMORY \
rent
Iuminates
if
Dolby
B
or
C
circuits
are
on.
C circuits are on.
TRANSPORT MODE
Indicates transport
mode: one way, auto
reverse, continuous.
MEMORY
Indicates Memory is
engaged.
MEMORY
Indicates Memory is
engaged.
Indicates unit is in Copy
mode.
EDIT
0:00 Indicates unit is in
Indicates tape position Edit mode.
in minutes and seconds. HI SPD
Indicates unit is in High
Speed Copy mode.
Copy
Press to begin automatic
copying procedure.
Hi-Speed Copy
Press to begin automatic high
speed copying procedure.
Sync Reverse
Activates automatic synchronized
reverse copying in Copy and Hi-
Speed Copy modes.
Edit
Press to begin Edit mode.
* NOTE
Dolby
noise
reduction
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
“DOLBY”
and
the
double-D
symbol
[X]
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.

CONTROLS AND FUNCTIONS Direction Mode
Selects one way, reverse,
or continuous transport
mode.
Input Level
Adjusts recording level.
Power
Switch
PRI/SEC
Transport
Selector
Press
to
turn
unit
on/off.
Selects
which
transport
(either
Primary
or
Secondary)
is
to be
operated
by
the
transport
controls.
arman/kardon
DC5300
odal
Cassette
Deck
PRI “
a<a >> R
Stop acon MPX
BC
Reverse Play ———_—_—______—
a
Stops
tape
movement.
oo
we
MEMORY
Begins playback or recording in
: . Primary Transpov
reverse direction.
!
(
pau
Rewind
————_$_—$—_———__—_—
*;
me
a
Rapidly
rewinds
tape.
Dffrorey
ec
nr;
Dif.
AUTO-RE|
Eject
Press to load/remove tape
cassette in Primary transport. | REC PAUSE MUTE
Rec/Pause
Puts cassette deck in Record-
ready or Pause mode.
:
a
Dolby
NR
+
Selects Dolby on/off, Dol
(
Play
B
mode,
or
Dolby
C
mod
.
Begins
playback
or
Fast
Forward
MPX
Filter
————
‘
recording.
Rapidly
advances
tape.
Rec
Mute
Press
when
using
Dolby
Inserts
blank
space
when reduction
while
recording
recording.
stereo
broadcasts.
PRI
Illuminates when
Primary
tape
transport
is
currently
operated
by
the
(
.
transport
controls.
!
LEVEL
MPX
Shows
signal
level.
Indicates
MPX
Filter
is
engaged.
<<>> 18
Displays operating mode of transport:
Record, Forward Play, Reverse Play,
Fast Forward, Rewind, Pause, Stop.
B -35 -20 -10 -7 -5 -3 -1 QQ +1 +3 +5 +8
RECORD
Te
INuminates when transport is i
Record
mode.
R
SS
SS
Se
Se
<<
iT
RECORD MPX [7] CONT HISPD
Oo pc Od BC
Illuminates if Dolby B or MEMORY
C circuits are on.
TRANSPORT MODE
Indicates transport
mode: one way, auto
reverse, continuous.
‘ MEMORY
Indicates Memory is
engaged.
Indicates |
mode.
EDIT
10:00
Indicates
uni
Indicates
tape
position
Edit
mode.
in
minutes
and
seconds.
HISPD
Indicates unit is
Speed Copy mc

Input Balance
Adjusts recording balance of
left and right channels
Fine Trim
Adjust when recording.
InputPalance jas A Pcandary Transpprt
C R i
Hi Cut
DIRECTION MODE RESET EJECT ae
| /
Memory Eject
off, Dolby ee Pont akneatt Press to load/remove tape
C mode. pe 0 app y cassette in Secondary transport.
00:00 on Counter.
Reset
} Dolby noise Resets Counter to
cording FM 00:00.
3.
SEC
llluminates when Secondary tape transport is
currently operated by the transport controls.
<<4>pPile
Displays operating mode of
transport: Record, Forward Play,
Reverse Play, Fast Forward,
Rewind, Pause, Stop.
DO Bc
MEMORY Iuminates if Dolby B or
C circuits are on.
PY
é ay MEMORY
jicates unit is in Copy Indicates Memory is
de.
engaged.
tes unit is in
1ode.
sunit is in High
opy mode.
Copy
Press to begin automatic
copying procedure.
Hi-Speed Copy
Press to begin automatic high
speed copying procedure.
Sync Reverse
Activates automatic synchronized
reverse copying in Copy and Hi-
Speed Copy modes.
Edit
Press to begin Edit mode.
* NOTE
Dolby
noise
reduction
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
“DOLBY”
and
the
double-D
symbol
[X]
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.

DC5300
DISASSEMBLY
PROCEDURES
(REFER
TO
PAGE
9,
10
and
11)
[1] TOP COVER (133) REMOVAL
Remove 4 screws (A) and 2 screws (B), andthen remove
the Top Cover(133).
FRONT PANEL ASSEMBLY (AA) REMOVAL
1. Remove the Top Cover (133).
2. Disconnect 1 connector (JL901) from (CN904) on the
Main P. C. Board (PCB-1).
3. Remove 6 screws (C) and 3 screws (D), and the
remove the Front Panel Assembly (AA).
4. If necessary, unsolder the lead wires.
CASSETTE TAPE RECORDER MECHANISM
ASSEMBLY (103) REMOVEL
1. Remove the Front Panel Assembly (AA). (Refer to
Step 2.)
2. Disconnect 4 connectors (LCN101/351, LCN801,
LCN802 and LCN803) on the Primary Transport P. C.
Board (103).
3. Remove 4-screws (E), and then the Cassette Tape
Recorder Mechanism Assembly (103).
[4] CASSETTE TAPE PLAYER MECHANISM
ASSEMBLY (104) REMOVAL
1. Remove the Front Panel Assembly (AA). (Refer to
Step 2).
2. Disconnect 4 connectors (LCN151, LCN806, LCN807
and LCN808) on the Secondary Transport P. C.
Board (104).
3. Remove 4 screws (F), and then the Cassette Tape
Player Mechanism Assembly (104).
[5] MAIN P. C. BOARD (PCB-1) REMOVAL
1. Remove the Front Panel Assembly (AA). (Refer to
step 2).
2.
Disconnect 4 connectors (LCN151, LCN806, LCN807
and LCN808) onthe Secondary TransportP. C. Board
(103).
. Disconnect 4 connectors (LCN101/351, LCN801,
LCN802 and LCN803) on the Primary Transport P. C.
Board (104).
. Disconnect 5 Jumper Leads (JL1, JL2, JL3, JL4 and
JL5) from 5 connectors (CN805, CN804, CN803, CN802
and CN801) on the Power P. C. Board (PCB-4).
. Remove 9 screws (G), 1 screw (H) and 2 screws (I)
and then remove the Main P. C. Board (PCB-1).
POWER P. C. BOARD (PCB-4) REMOVAL
1.
2.
3.
4.
Remove the Front Panel Assembly (AA). (Refer to
step 2).
Disconnect 5 Jumper Leads (JL1, JL2, JL3, JL4 and
JL5) on the. Power P. C. Board (PCB-4).
Disconnect 3 connectors (LCN801, LCN802 and
LCN803) on the Primary Transport P. C. Board.
Remove 5 screws (J) and 4 screws (K), and then
remove the Power P. C. Board (PCB-4).
OTHER P.C. BOARDS REMOVAL
1.
2.
3.
Remove the Front Panel Assembly (AA). (Refer to
step 2).
Remove 4 screws (L), and then remove the Cont
SW-L P. C. Board (PCB-7).
Remove 3 screws (M), and then remove the Cont
SW-R P. C. Board (PCB-6).
. Remove 3 Rotary Knobs (146) and 3 screws (N), and
then remove the Volume P. C. Board (PCB-2).
. Remove 7 screws (QO), and then remove the Front P.
C. Board (PCB-5).
POWER CORD REPLACEMENT (FOR SERVICE ENGINEERS OTHER THAN NORTH
AMERICA)
In order to prevent fire shock hazard when replacing the power cord, follow the Procedure below to replace the part
with the standard supply parts.
Pi
POWER CORD
PCB-4
CABINET BACK
100mm
MAX.
8mm
The signal from the playback head (Primary Transport)
is amplified by the playback amplifier Q101, Q103 and
Q.105 (L ch.), and is applied to the pin 29 (L ch.) and 2 (R
ch.) of the Dolby NR 1IC501 (B/C type) through the
Switching 1IC701. Use the same signal for both the
secondary transport and the primary transport.
Switching of the playback signal from the record mode
(external input signal) to the playback mode is per-
formed inside IC501.
IC501 is usually switched to the playback mode. How-
ever, the control signal transmitted to the pin 5 of IC501
from 1C751 through 0505 and 0506 switches IC501
from the record mode to the playback mode. The input
signal to IC501 is output from the pins 25 (Lch.) and 6 (R
ch.) and applied to the OUTPUT AMP.
RECORD SIGNAL
The
signal
from
the
INPUT
jack
is
controlled
by
the
INPUT
LEVEL
control.
It
is
applied
to the
pins
30
(L
ch.)
and 1(R ch.) of the Dolby NR 1C501 (B/Ctype): Switching.
of the record signal from the playback mode to the
record mode is performed inside IC501. The control
signal transmitted. to the pin'5 of 1C501 from [C751
through Q505 and Q506 switches 1C501 from the play-
back mode to the record mode.
The input signal to the Dolby NR IC is Siku from the
pins 28 (L ch.) and 3 (Rch.) of C501 and passed through
the MPX filter. Then it is input to the pins 27 (Lch.) and
4 (R ch.) and is output from the pins 24 (L ch.) and 7 (R
ch.). The encoded signal is input to the pins 23 (L ch.)
and 8 (Rch.) and then it is output from the pins 18 (Lch.)
and 13 (R ch.). The signal output from 1C501 passes
through the record equalizer circuit and is amplified by
the record amplifier of 1C201. The amplified signal is
then applied to the recording head after being
synthesized by a bias signal. ©
INPUT LEVEL
25 Jt
MPX DOLBY —9
Ji
OUTPUT
HL
B.C
NA
CIRCUIT
INPUT Apel
J2
PLAYBACK AMP Sut
Q101—-106
REMOTE
8{
SWITCHING
J3
RPH1
PRIMARY
~~
(7a
IN
=
I
| ie
I [
EQUALIZER | +—{ ><] SOLENOIA
CIRCUIT
!
of
1
(AEE
| Q201— 212 ICaot}-agnteet
Peiciee
S|
b--}----4----4------}-----=-
LOGIC
CONTROL
[aga
GAP
STAN
ae
Arsh
SOLENOIA
SECONDARY
~~
—_—
Hn REEL |SECONDARY
CAPSTAN
MOTOR
EMI ita es
MAIN CONTROLLER
FeApe 7 ic901
$913
S910
S909
S911
S914
S904
S908
S902
__—-sg05
$016_$920_s918
$912 $915 $907 $906
PLAYBACK SIGNAL MUTING OPERATION
The signal that mutes the sound produced at switching
to recording or playback is applied from IC751 of the
logic control block.
When the “STOP” button is pressed, the mute signal
output from the pin 22 of IC751 turns ON Q709 (L ch.)
and Q710 (R ch.) to short-circuit the output signals of
the playback amplifiers for muting. For the purpose of
preventing generation of noise at power ON/OFF, the
mute signal is output from 051. The muting is done by
short circuiting the output signal with Q709 (L ch.) and
Q710 (R ch.) turned ON.
LOGIC FOR RECORD MODE
When the “REC” button is pressed, the pin 11 of IC751
becomes high level and 0109 (L ch.) and Q110 (R ch.)
turn ON. The input to the Dolby NR IC is muted. Also
Q712 and Q713 turn ON and Q711 turns OFF. Therefore
0701, 0703 (L ch.) and Q702, 0704 (R ch.) turn OFF to
release the muting of the outputs from the record
amplifiers.
Also, 0505 turns ON and 0506 turns OFF to make the
pin 5 of IC501 high level. Therefore the mode is
switched to the record mode.
LOGIC FOR RECORD TO PLAYBACK MODE
When the “STOP”, “PAUSE” or “PLAY” button is
pressed, the pin 12 of C751 becomes high level. 0.219
turns
ON
and
Q213
(Lch.),
Q214
(Rch.)
turn
ON
to
mute
the inputs to the record amplifiers. Also, Q712 and
Q713 turn OFF and Q711 turns ON to turn ON Q701,
Q703 (L ch.) and Q702, 0704 (R ch.). Therefore the
outputs from the record amplifiers are muted.
Also, 0505 turns OFF and Q506 turns ON to make the
pin 5 of C501 low level. Therefore the mode is switched
to the playback mode.

DISASSEMBLY PROCEDURES (REFER TO PAGE 9, 10 and 11)
[1] TOP COVER (133) REMOVAL
Remove 4screws (A) and 2 screws (B), andthen remove
the Top Cover(133).
FRONT PANEL ASSEMBLY (AA) REMOVAL
1. Remove the Top Cover (133).
2. Disconnect 1 connector (JL901) from (CN904) on the
Main P. C. Board (PCB-1).
3. Remove 6 screws (C) and 3 screws (D), and the
remove the Front Panel Assembly (AA).
4. If necessary, unsolder the lead wires.
CASSETTE TAPE RECORDER MECHANISM
ASSEMBLY (103) REMOVEL
1. Remove the Front Panel Assembly (AA). (Refer to
Step 2.)
2. Disconnect 4 connectors (LCN101/351, LCN801,
LCN802 and LCN803) on the Primary Transport P. C.
Board (103).
3. Remove 4-screws (E), and then the Cassette Tape
Recorder Mechanism Assembly (103).
[4| CASSETTE TAPE PLAYER MECHANISM
ASSEMBLY (104) REMOVAL
1. Remove the Front Panel Assembly (AA). (Refer to
Step 2).
2. Disconnect 4 connectors (LCN151, LCN806, LCN807
and
LCN808)
on the
Secondary
Transport
P.
C.
Board (104).
3. Remove 4 screws (F), and then the Cassette Tape
Player Mechanism Assembly (104).
[5] MAIN P. C. BOARD (PCB-1) REMOVAL
1. Remove the Front Panel Assembly (AA). (Refer to
step 2).
2. Disconnect 4 connectors (LCN151, LCN806, LCN807
and LCN808) onthe Secondary TransportP. C. Board
(103).
3. Disconnect 4 connectors (LCN101/351, LCN801,
LCN802 and LCN803) on the Primary Transport P. C.
Board (104).
4. Disconnect 5 Jumper Leads (JL1, JL2, JL3, JL4 and
JL5) from 5connectors (CN805, CN804, CN803, CN802
and CN801) on the Power P. C. Board (PCB-4).
5. Remove 9 screws (G), 1 screw (H) and 2 screws (I)
and then remove the Main P. C. Board (PCB-1).
POWER P. C. BOARD (PCB-4) REMOVAL
1. Remove the Front Panel Assembly (AA). (Refer to
step 2). :
2. Disconnect 5 Jumper Leads (JL1, JL2, JL3, JL4 and
JL5) on the. Power P. C. Board (PCB-4).
3. Disconnect 3 connectors (LCN801, LCN802 and
LCN803) on the Primary Transport P. C. Board.
4. Remove 5 screws (J) and 4 screws (K), and then
remove the Power P. C. Board (PCB-4).
OTHER P.C. BOARDS REMOVAL
1. Remove the Front Panel Assembly (AA). (Refer to
step 2).
2. Remove 4 screws (L), and then remove the Cont
SW-L P. C. Board (PCB-7).
3. Remove 3 screws (M), and then remove the Cont
SW-R P. C. Board (PCB-6).
4. Remove 3 Rotary Knobs (146) and 3 screws (N), and
then remove the Volume P. C. Board (PCB-2).
5. Remove 7 screws (O), and then remove the Front P.
C. Board (PCB-5).
POWER
CORD
REPLACEMENT
(FOR
SERVICE
ENGINEERS
OTHER
THAN
NORTH
AMERICA)
In
order
to
prevent
fire
shock
hazard
when
replacing
the
power
cord,
follow
the
Procedure
below
to
replace
the
part
with the standard supply parts.
Pi
POWER CORD
Ba]
rt HOLDER
11
POWER
TRANSFORMER
BLUE
PCB-4
CABINET BACK
100mm
MAX.
8mm

BLOCK DIAGRAM
INPUT LEVEL
VR203, 204
a
input ©
PLAYBACK AMP
Q101-106
8} SWITCHING
RPHI oy
PRIMARY J
EQUALIZER
CIRCUIT
Q201~ 212
PLAYBACKAMP}] {i i
Q151-156
PH1
SECONDARY ~~.
EH1
ERASE X 9
HEAD
CIRCUIT DESCRIPTION
PLAYBACK SIGNAL
The signal from the playback head (Primary Transport)
is amplified by the playback amplifier Q101, Q103 and
Q105 (Lch.), and is applied to the pin 29 (Lch.) and 2 (R
ch.) of the Dolby NR IC501 (B/C type) through the
Switching IC701. Use the same signal for both the
secondary transport and the primary transport.
Switching of the playback signal from the record mode
(external input signal) to the playback mode is per-
formed inside IC501.
1C501 is usually switched to the playback mode. How-
ever, the control signal transmitted to the pin 5 of IC501
‘from 1C751 through Q505 and Q506 switches IC501
from the record mode to the playback mode. The input
signal to 1C501 is output from the pins 25 (Lch.) and 6 (R
ch.) and applied to the OUTPUT AMP.
RECORD SIGNAL
The signal from the INPUT jack is controlled by the
INPUT LEVEL control. It is applied to the pins 30 (L-ch.)
and 1(R ch.) ofthe Dolby NR IC501 (B/Ctype): Switching
of the record signal from the playback mode to the
record mode is performed inside IC501. The control
signal transmitted to the pin'5 of IC501 from 1C751
through 0505 and 0506 switches IC501 from the play-
back mode to the record mode.
The input signal to the Dolby NR IC is output from the
pins 28 (Lch.) and 3 (Rch.) of C501 and passed through
the MP X filter. Then it is input to the pins 27 (Lch.) and
4(R ch.) and is output from the pins 24 (L ch.) and 7 (R
ch.). The encoded signal is input to the pins 23 (L ch.)
and 8 (Rch.) and then it is output from the pins 18 (Lch.}
and 13 (R ch.). The signal output from 1C501 passes
through the record equalizer circuit and is amplified by
the record amplifier of 1C201. The amplified signal is
then applied to the recording head after being
synthesized by a bias signal.
MPX DOLBY
B.C NR CIRCUIT
C501
Q505, 506
$913 S910 S909 S911 S914 S904 S908
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J2
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MAIN CONTROLLER
IC901
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MUTING OPERATION
The signal that mutes the sound produced at switching
to recording or playback is applied from IC751 of the
logic contro! block.
When the “STOP” button is pressed, the mute signal
output from the pin 22 of 1C751 turns ON Q709 (L ch.)
and Q710 (R ch.) to short-circuit the output signals of
the playback amplifiers for muting. For the purpose of
preventing generation of noise at power ON/OFF, the
mute signal is output from Q51. The muting is done by
short circuiting the output signal with Q709 (L ch.) and
Q710 (R ch.) turned ON.
LOGIC FOR RECORD MODE
When the “REC” button is pressed, the pin 11 of iC751
becomes high level and 0109 (L ch.) and Q110 (R ch.)
turn ON. The input to the Dolby NR IC is muted. Also
Q712 and Q713 turn ON and Q711 turns OFF. Therefore
Q701, Q703 (L ch.) and Q702, Q704 (R ch.) turn OFF to
release the muting of the outputs from the record
amplifiers.
Also, 0505 turns ON and Q506 turns OFF to make the
pin 5 of IC501 high level. Therefore the mode is
switched to the record mode.
LOGIC FOR RECORD TO PLAYBACK MODE
When the “STOP”, “PAUSE” or “PLAY” button is
pressed, the pin 12 of C751 becomes high level. 0219
turns ON and 0213 (Lch.), 0214 (R ch.) turn ON to mute
the inputs to the record amplifiers. Also, Q712 and
Q713 turn OFF and Q711 turns ON to turn ON Q701,
Q703 (L ch.) and 0702, Q704 (R ch.). Therefore the
outputs from the record amplifiers are muted.
Also, 0505 turns OFF and 0506 turns ON to make the
pin 5 of {C501 low level. Therefore the mode is switched
to the playback mode.

TIMING CHART
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REV.PLAY
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ALIGNMENT
PROCEDURES
(REFER
TO
PAGES
11,
12,
23,
24
AND
25)
CASSETTE MECHANISM CONFIRMATION
Make sure to confirm conditons of the cassette mecha-
nism as follows before adjustment.
1. Confirmation of erase prevention function
* The switch should turn ON when a tape with erro-
neous erase preventive pawl is inserted. (Use a
tape which is 0.2 mm smaller than the minimum
size of 62.9 mm or a MAZ-0184-C gauge one.)
When the switch arm is moved back gradually from
the ON position, the switch turn OFF.
2. Confirmation of cassette pack detection function
The switch should turn ON when a tape is inserted.
(Use a tape whose minimum size is 63.5 mm or a
MAZ-0184-C gauge one.)
When the switch arm is moved back gradually from
the ON position, the switch should turn OFF.
.
3. Confirmation of eject function
The cassette compartment opens smoothy and no
abnormal noise should be heard while opening and
closing.
The eject lever opens smoothly without contacting
the chassis and damper.
The eject button can not be pressed during play-
back.
4. Confirmation of playback, fast forward and rewind
functions
The torque used in each of the playback, fast for-
ward and rewind modes should be within specifi-
cation.
Playback \..cc eee 35 gr:cm — 70 gr.cm
Fast Forward.......... 70 gr.cm — 150 gr.cm
REWING oo. eeeeeseeeeeee 70 gr.cm — 150 gr.cm
No abnormal noise should be heard during opera-
tion in any mode. The solenoid switching sound
should not be considered as a noise.
5. Confirmation of positions of record/playback head
and playback head
* Head height
a) Set the M-300 head gauge.
b) Set the unit in the playback mode and place the
adjustment chip on the head gauge as shown in
the Fig. 1. ‘
c) The adjustment chip should not contact the tape
guide of both record/playback head and playback
head.
TAPE GUIDE
CHIP?
HEAD GAUGE
net
r HEAD GAUGE
RECORD/PLAYBACK or PLAYBACK HEAD
HEAD AZIMUTH ADJUSTMENT SCREW
Fig. 1
* Head position
a) Set the M-300 head gauge.
b) Set the unit in the playback mode and place the
adjustment chip on the head gauge as shown in
the Fig. 2.
c) With both record/playback head and playback
head, the adjustment chip should be between MIN
and MAX of the M-300 head gauge.
RECORD/PLAYBACK or PLAYBACK HEAD
Fig. 2
HEAD GAUGE
ELECTRICAL
ADJUSTMENT
AND
CONFIRMATION
1. Before adjustment
*
Before
electrical
adjustment,
make
sure
that
con-
firmations
of
the
cassette
mechanism
are
all
com-
pleted.
*
After
the
power
switch
is
pushed
on,
wait
for
10
minutes
before
measuring
to
be
sure
of
the
most
stable
operation.
* Since head magnetization, dust accumulations, etc.
are likely to introduce errors in the various charac-
teristics,
it
is
very
important
that
the
heads
are
properly demagnetized and cleaned before com-
mencing
any
adjustment,
particularly
frequency
response and head azimuth adjustment.
2. Instruments required
* Low frequency oscillator
* AC VTVM or dual channel AC VITVM
* Oscilloscope
*« Wow/flutter meter
¢ Frequency counter
* Distortion meter
3. Test tapes
¢ Azimuth adjustment ............... MTT-114 or TCC-153
*
Tape
speed
adjustment
....
MTT-111DN
or
TCC-112
*
Playback
output
level
adjustment
.........ccccccsssseseseses
MTT-150 or TCC-130
* Playback frequency characteristic confirmation
seveisvascaeevsaseass
TCC-1216
or
TCC-162C
and
TCC-262C
« Reference tapes
Note:
C-90 differes with C-60 in the thickness and bias is of
unequal, so adjust with the tape whose bias in of
Specified Value.
4.
General
conditions
(unless
otherwise
noted)
Controls and Switches
Dolby NR Off
Input Level Maximum
MPxX Filter Off
Bias Fine Trim Center
Input Balance Center
Azimuth Adjustment
When
the
maximum
level
point
of
R
channel
does
not
equal
that
L
channel,
connect
the
oscilloscope
as
shown
in
Fig.
3
and
proceed
with
azimuth
adjustment
so
that
L and R channels are in phase.
a)
Connect
L
channel
tape
out
to
“X
(or
V)”
and
R
channel
to
“Y
(or
H)”.
Observe
the
lissajouss
wave-
form.
Set
L
and
R
channels
to
monaural.
Adjust
vertical
and
horizontal
gain
so
that
the
waveform
becomes
45 degree.
c)
Adjust
azimuth
so that
the
measurement
of
“a”
becomes
maximum
and
the
measurement
of
”b”
becomes
minimum
against
the
45
degree
line.
b
=
Oscilloscope
!
PLAYBACK
FREQUENCY
CHARACTERISTIC
COPY/PLAYBACK
FREQUENCY
CHARACTERISTIC
TEST TAPE : TCC-162C, TCC-262C
100Hz 315Hz
RECORD/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE : SCC-502, SCC-1360, SCC-565
DOLBY NO : OFF
0
-3dB
100Hz 315Hz 18kHz
Fig. b
TEST TAPE: TCC-262C TO SCC-502
TCC-162C SCC-1360
SCC-565
0
-3dB
100Hz 315Hz 4kHz 15kHz
(TYPE IV)
Fig. c
HI-SPEED COPY/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE: TCC-262C TO SCC-502
TCC-162C SCC-1360
SCC-565
100Hz 315Hz

ALIGNMENT PROCEDURES (REFER TO PAGES 11, 12, 23, 24 AND 25)
CASSETTE MECHANISM CONFIRMATION
Make sure to confirm conditons of the cassette mecha-
nism as follows before adjustment.
1. Confirmation of erase prevention function
* The switch should turn ON when a tape with erro-
neous erase preventive pawl is inserted. (Use a
tape which is 0.2 mm smaller than the minimum
size of 62.9 mm or a MAZ-0184-C gauge one.)
When the switch arm is moved back gradually from
the ON position, the switch turn OFF.
2. Confirmation of cassette pack detection function
The switch should turn ON when a tape is inserted.
(Use a tape whose minimum size is 63.5 mm or a
MAZ-0184-C gauge one.)
When the switch arm is moved back gradually from
the ON position, the switch should turn OFF.
3. Confirmation of eject function
The cassette compartment opens smoothy and no
abnormal noise should be heard while opening and
closing.
The eject lever opens smoothly without contacting
the chassis and damper.
The eject button can not be pressed during play-
back.
4. Confirmation of playback, fast forward and rewind
functions
The torque used in each of the playback, fast for-
ward and rewind modes should be within specifi-
cation.
Playback ......ccsceeesees 35 gr:cm — 70 gr.cm
Fast Forward .......... 70 gr.cm — 150 gr.cm
ReWIN ue. secsseseeneeees 70 gr.cm — 150 gr.cm
No abnormal noise should be heard during opera-
tion in any mode. The solenoid switching sound
should not be considered as a noise.
5. Confirmation of positions of record/playback head
and playback head
*« Head height
a) Set the M-300 head gauge.
b) Set the unit in the playback mode and place the
adjustment chip on the head gauge as shown in
the Fig. 1.
c) The adjustment chip should not contact the tape
guide of both record/playback head and playback
head.
TAPE. GUIDE
CHIP
HEAD GAUGE
HEAD AZIMUTH ADJUSTMENT SCREW
Fig. 1
« Head position
a) Set the M-300 head gauge.
b) Set the unit in the playback mode and place the
adjustment chip on the head gauge as shown in
the Fig. 2.
c) With both record/playback head and playback
head, the adjustment chip should be between MIN
and MAX of the M-300 head gauge.
HEAD GAUGE
RECORD/PLAYBACK or PLAYBACK HEAD
Fig. 2

ELECTRICAL ADJUSTMENT AND CONFIRMATION
1. Before adjustment
« Before electrical adjustment, make sure that con-
firmations of the cassette mechanism are all com-
pleted.
* After the power switch is pushed on, wait for 10
minutes before measuring to be sure of the most
stable operation.
« Since head magnetization, dust accumulations, etc.
are likely to introduce errors in the various charac-
teristics, it is very important that the heads are
properly demagnetized and cleaned before com-
mencing any adjustment, particularly frequency
response and head azimuth adjustment.
2. Instruments required
* Low frequency oscillator
« AC VTVM or dual channel AC VTVM
* Oscilloscope
¢ Wow/flutter meter
« Frequency counter
¢ Distortion meter
3. Test tapes
¢ Azimuth adjustment ............05 MTT-114 or TCC-153
* Tape speed adjustment .... MTT-111DN or TCC-112
¢ Playback output level adjustMent ...........scccseesereees
MTT-150 or TCC-130
* Playback frequency characteristic confirmation
sSScesess sebtyaesaaee TCC-1216 or TCC-162C and TCC-262C
¢ Reference tapes
Note:
C-90 differes with C-60 in the thickness and bias is of
unequal, so adjust with the tape whose bias in of
Specified Value.
PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE : TCC-162C, TCC-262C
20Hz 100Hz 315Hz
RECORD/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE : SCC-502, SCC-1360, SCC-565
DOLBY NO: OFF
0
-3dB
20Hz 100Hz 315Hz
4. General conditions (unless otherwise noted)
Controls and Switches
Dolby NR Off
Input Level Maximum
MPx Filter Off
Bias Fine Trim Center
Input Balance Center
Azimuth Adjustment
When the maximum level point of R channel does not
equal that Lchannel, connectthe oscilloscope as shown
in Fig. 3 and proceed with azimuth adjustment so that
L and R channels are in phase.
a) Connect L channel tape out to “X (or V)"” and R
channel to “Y (or H)”. Observe the lissajouss wave-
form.
Set L and R channels to monaural. Adjust vertical
and horizontal gain so that the waveform becomes
45 degree.
c) Adjust azimuth so that the measurement of “a”
becomes maximum and the measurement of “b”
becomes minimum against the 45 degree line.
b
=
Oscilloscope
COPY/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE: TCC-262C TO SCC-502
TCC-162C SCC-1360
SCC-565
0
-3dB
100Hz 315Hz 4kHz 15kHz
(TYPE IV)
Fig. c
Hi-SPEED COPY/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE: TCC-262C TO SCC-502
TCC-162C SCC-1360
SCC-565
100Hz 315Hz

Alignment
Instrument
Required
Input
Signal
Mode
Primary
Deck
VTVM
PB
Quick
sensor
Black
tape
with
leader
tape
(Primary)
Secondary
Deck
VTVM
PB
Quick
sensor
Black
tape
with
leader
tape
(Secondary)
TP859
-
VR853
VTIVM
TP501
(L
ch),
GND
Azimuth
Oscilloscope
TP502
(R
ch),
GND
Azimuth
screw
Test
tape
(MTT-114
or
TCC-153)
ie
OUTPUT
jack
Test Point Adjustment For
Adjust VR803 so the voltage at the test point is 0.62V when the
leader tape is running and 200 mV or less in the middle of tape.
Adjust VR853 so the voltage at the test point is 0.62V when the
leader tape is running and 200 mV or less in the middle of tape.
TP809 VR803
Maximum output
Refer to “Azimuth Adjustment” on page 6.
Primary
Deck
Frequency
counter
TP501
(L
ch),
GND
Tape
speed
(Hi-speed)
Test
tape
(MTT-111DN
or
TCC-112)
TP502
(R
ch),
GND
Primary
Deck
Frequency
counter
TP501
(L
ch),
GND
|
VR801 6020 Hz +20 Hz (TP806 : GND connection)
Adjust at the center of test tape.
3010 Hz +10 Hz
Adjust at the center of test tape.
6020 Hz +20 Hz (TP856 : GND connection)
Adjust at the center of test tape.
Tape
speed
(Normal
speed)
|
Test
tape
(MTT-111DN
or
TCC-112)
TP502(Rch),GND
|
“R802
Secondary Deck Frequency counter
Tape speed (Hi-speed) Test tape (MTT-111DN or TCC-112)
Frequency counter
12)
TP501 (L ch), GND
TP502(Rch),GND | VR851
3010 Hz +10 Hz
TP501 (L ch), GND VR852
TP502
(R
ch),
GND
Adjust
at
the
center
of
test
tape.
775 mV
TP501 (L ch), GND VR101 (L ch) : we
TP502(Rch),GND
|
VR102
(R
ch)
ase
Boy
aaa
PoSnon
775 mV
Tape selector is Normal position.
Adjust at Dolby NR off.
Adjust VR103 and VR104 so the playback frequency response
(1 kHz/18 kHz) is +0.6 ~ 0.7 dB.
Refer to Fig. a
Adjust VR153 and VR154 so the playback frequency response
(1 kHz/18 kHz) is +0.6 ~ 0.7 dB.
Refer to Fig. a
Secondary Deck
Tape speed (Normal speed) | Test tape (MTT-111DN or TCC-1
Primary
Deck
VTVM
PB
Playback
output
level
Test
tape
(MTT-150
or
TCC-130)
(Primary)
VR157 (L ch)
Secondary
Deck
VTVM
FE
|
eee
GND
VR158
(R
ch)
15
c
Playback
output
level
Test
tape
(MTT-150
or
TCC-130)
(Secondary)
TP502
(R
ch),
GND
Primary
Deck
VTVM
PB
TP501
(L
ch),
GND
VR103
Playback
frequency
Test,tape
(TCC-1216
or
TCC-162C
(Primary)
TP502
(R
ch),
GND
VR104
characteristic
confirmation
|
and
TCC-262C)
or
OUTPUT
jack
Secondary
Deck
VTIVM
PB
TP501
(L
ch),
GND
Playback
frequency
Test
tape
(TCC-1216
or
TCC-162C
TP502
(R
ch),
GND
nee
characteristic
confirmation
|
and
TCC-262C)
or
OUTPUT
jack
(Secondary
Bias frequency
confirmation
Frequency counter
REC/PB
(Primary)
TP101 (L ch), GND
| T301
105 kHz +3 kHz
Use METAL tape.
Bias trap
VTVM
Bias level (pre-adjustment)
Record level
(pre-adjustment)
.
VTVM
Blank tapes
METAL SCC-565
CrO2 SCC-1360
Normal SCC-502
Apply 1 kHz signal to INPUT jack. Set INPUT LEVEL knob
so that TP501 and TP502 to GND voltage is 560 mV in
REC-PAUSE mode.
REC/PB
(Primary)
REC/PB
(Primary)
REC/PB
(Primary)
pane (R ch), GND
TP201 (L ch), GND
TP202 (R ch), GND
TP101 (L ch), GND
TP102 (R ch), GND
TP501 (L ch), GND
TP502 (R ch), GND
LC201, LC202
VR201, VR202
VR351, VR352
Minimum output
Use METAL tape.
INPUT VR. minimum
35 mV :
Test tape is METAL blank tape.
20 mV
Test tape is CrO2 blank tape.
13 mV
Test tape is Normal blank tape.
560 mV
Tape selector is METAL position.
Adjust VR351 and VR352 so that the distortion becomes 1.0% — 1.4%
VR353 560 mV eee
(CrO2)
Adjust
VR353
so
that
the
distortion
becomes
1.3%
(CrO2).
VR354
(Normal)
Adjust
VR354
so
that
the
distortion
becomes
1.0%
(Normal).
This confiemation should be at each tape selector position.
Record/playback
frequency characteristic
VTIVM
Blank tapes
CrO2 SCC-1360
METAL SCC-565
Normal SCC-502
Apply 1 kHz signal to INPUT jack. The output at TP501
and TP502 are Dolby level -25 dB.
Then adjust with a 20 Hz to 30 kHz sweep signal.
REC/PB
OUTPUT jack
VR353
L201, L202
(VR351, VR352)
So that the record/playback frequency resportion is flat (at least
within the range in Fig. b.)
Tape selector is CrO2 position.
VR351
VR352
So
that
the
record/playback
frequency
resportion
is
flat
(at
least
within
the
range
in
Fig.
b.)
Tape
selector
is
METAL
position.
VR354
L201, L202
(VR351, VR352)
So
that
the
record/playback
frequency
resportion
is
flat
(at
least
Record level
VTVM
Blank tapes
CrO2 SCC-1360
METAL SCC-565
Normal SCC-502
High speed copy
frequency characteristic
VTVM
Blank tapes
CrO2 SCC-1360
METAL SCC-565
Normal SCC-502
Test tape
TCC-185C
Set INPUT LEVEL knob so that TP501 and TP502 to GND
voltage is 560 mV (1 kHz) in REC-PAUSE mode.
REC/PB
7
TP501 (L ch), GND
TP502 (R ch), GND
within the range in Fig. b.)
Tape selector is Normal position.
560 mV
Perform adjustment using CrO2.
Perform checking only for Normal and METAL tapes.
High Speed
Copy Play
OUTPUT
L203, L204
Load
TCC-185C
in
SEC
DECK
and
SCC-565
in
PRI
DECK
and
execute
high-speed
copying,
then
play
the
tape
in
the
PRI
DECK.
Check
that
the
frequency
response
of
the
14
kHz
signal
is
within
+3
dB
of
that
of
the
1 kHz
signal.
If
this
specification
cannot
be
satisfied,
adjust
L203
and
L204.
After
adjustment
is
confirmed,
also
use
the
SCC-502
and
SCC-1360
tapes
to
check.
High speed copy
frequency characteristic
VTVM
Blank tapes
CrO2 SCC-1360
METAL SCC-565
Normal SCC-502
Test tape
TCC-285C
High Speed
Copy Play
OUTPUT
L203, L204
peed
TCC
eeae
in
SEC
DECK
and
SCC-565
in
PRI
DECK
and
execute
high
speed
copying,
then
play
the
tape
in
the
PRI
DECK.
Check
that
the
frequency
response
of
the
14
kHz
signal
is
within
+3
dB
of
that
of
the
1
kHz
signal.
If
this
specification
cannot
be
satisfied,
adjust
L203
and
L204.
After
adjustment
is
confirmed,
also
use
the
SCC-502
and.SCC-1360
tapes
to
check.
Meter level
VTIVM
Apply 1 kHz signal to INPUT jack. Set INPUT LEVEL knob
so that TP501 and TP502 to GND voltage is1.5 dB below
775 mV.
REC/PAUSE
PEAK LEVEL METER
Adjust so the -1 dB segments light.
MPX filter characteristic
confirmation
VTVM
Apply 19 kHz, 15 kHz and 1 kHz signal to INPUT jack.
Set INPUT LEVEL knob so that TP501 and TP502 to GND
voltage is 775mV.
REC/PAUSE
MPxX filter
ON
TP501 (L ch), GND
TP502 (R ch), GND
or OUTPUT jack
Adjust for -0.3 dB at 15 kHz and > 35 dB at 19 kHz
EN Dn AE Oo SOEEEN STESO eC a SOE? OER
st tiga eiadeaaen

Step
Alignment
Instrument
Required
Input
Signal
1
Primary
Deck
VTVM
Quick
sensor
Black
tape
with
leader
tape
2
Secondary
Deck
VTVM
_|
Quick
sensor
Black
tape
with
leader
tape
VTVM
3
Azimuth
Oscilloscope
Test
tape
(MTT-114
or
TCC-153)
4
Primary
Deck
Frequency
counter
Tape
speed
(Hi-speed)
Test
tape
(MTT-111DN
or
TCC-112)
5
Primary
Deck
Frequency
counter
Tape
speed
(Normal
speed)
|
Test
tape
(MTT-111DN
or
Tec-112)
|
6
Secondary
Deck
Frequency
counter
Tape
speed
(Hi-speed)
Test
tape
(MTT-111DN
or
TCC-112)
7
Secondary
Deck
Frequency
counter
ie
aif
Tape
speed
(Normal
speed)
|
Test
tape
(MTT-111DN
or
TCC-112)
8
Primary
Deck
VTVM
|
Playback
output
level
Test
tape
(MTT-150
or
TCC-130)
9
Secondary
Deck
VTVM
Playback
output
level
Test
tape
(MTT-150
or
TCC-130)
Primary
Deck
VTVM
10
Playback
frequency
Test.tape
(TCC-1216
or
TCC-162C
characteristic
confirmation
|
and
TCC-262C)
Secondary
Deck
VTVM
11
Playback
frequency
Test
tape
(TCC-1216
or
TCC-162C
characteristic
confirmation
|
and
TCC-262C)
|
Bias
frequency
12
|
Bias
frequen
Frequency
counter
[
13
Bias
trap
VTIVM
1
:
2
|
Bias
level
(pre-adjustment)
|
VTVM
3
VTVM
Blank
tapes
Apply
1
kHz
signal
to
INPUT
jack.
Set
INPUT
LEVEL
knob
15
Record
level
METAL
SCC-565
so
that
TP501
and
TP502
to
GND
voltage
is
560
mV
in
(pre-adjustment)
CrO2
SCC-1360
REC-PAUSE
mode.
Normal
SCC-502
1
——
As
Apply
1
kHz
signal
to
INPUT
jack.
The
output
at
TP501
<6
2
Record/playback
;
ank
tapes
and
TP502
are
Dolby
level
-25
dB.
frequency
characteristic
CrO2z
SCC-1360
Then
adjust
with
a
20
Hz
to
30
kHz
sweep
signal.
METAL
SCC-565
x
Normal
SCC-502
|
|
VTIVM
Blank
tapes
Set
INPUT
LEVEL
knob
so
that
TP501
and
TP502
to
GND
7
Record
level
ca
ceeres
voltage
is
560
mV
(1
kHz)
in
REC-PAUSE
mode.
Normal
SCC-502
|
VTVM
Blank
tapes
18
Piph
Speed
CORY:
<7.
METAL:
SCC565
frequency
characteristic
Normal
SCC-502
Test
tape
TCC-185C
|
VTIVM
Blank
tapes
:
CrO2
SCC-1360
19
High
speed
copy
METAL
SCC-565
frequency
characteristic
Normal
SCC-502
Test
tape
}
TCC-285C
Apply
1
kHz
signal
to
INPUT
jack.
Set
INPUT
LEVEL
knob
20
Meter
level
VTVM
so
that
TP501
and
TP502
to
GND
voltage
is1.5
dB
below
775
mV.
?
ae
Apply
19
kHz,
15
kHz
and
1
kHz
signal
to
INPUT
jack.
21
Mic
iilter
ctraracteniste:
«
°)oyM
Set
INPUT
LEVEL
knob
so
that
TP501
and
TP502
to
GND
confirmation
voltage
is
775mV.

Mode Test Point Adjustment : For ;
PB TP809 VR803 Adjust VR803 so the voltage at the test point is 0.62V when the
(Primary) leader tape is running and 200 mV or less in the middle of tape.
PB TP859 VR853 Adjust VR853 so the voltage at the test point is 0.62V when the
(Secondary) leader tape is running and 200 mV or less in the middle of tape.
TP501 (L ch), GND
. Maximum output
PB TP502 (R ch), GND Azimuth screw Lwin ce ; Ai
or OUTPUT jack Refer to “Azimuth Adjustment” on page 6.
TP501 (L ch), GND VR801 6020 Hz +20 Hz (TP806 : GND connection)
TP502 (R ch), GND Adjust at the center of test tape.
TP501 (L ch), GND 3010 Hz +10 Hz
gs TP502(Rch),GND | YR802 Adjust at the center of test tape.
PB TP501 (L ch), GND VR851 6020 Hz +20 Hz (TP856 : GND connection)
TP502 (R ch), GND Adjust at the center of test tape.
TP501 (L ch), GND 3010 Hz +10 Hz
PB TP502 (R ch), GND VR852 Adjust at the center of test tape.
775 mV
PB
TPS501
(L
ch),
GND
VR101
(L
ch)
:
x
(Primary) TP502 (Rch), GND —_| VR102(R ch) aoe Dai ue ta poewion:
775 mV
PB
TP501
(L
ch),
GND
VR157
(L
ch)
:
-
(Secondary) | TP502(Rch), GND __| VR158 (R ch) Neo
PB TP501 (L ch), GND VR103 Adjust VR103 and VR104 so the playback frequency response
(Primary) TP502 (R ch), GND VR104 (1 kHz/18 kHz) is +0.6 ~ 0.7 dB.
: or OUTPUT jack Refer to Fig. a
PB TP501 (L ch), GND VR153 Adjust VR153 and VR154 so the playback frequency response
(Secondar TP502 (R ch), GND VR154 (1 kHz/18 kHz) is +0.6 ~ 0.7 dB.
y or OUTPUT jack Refer to Fig. a
REC/PB TP101 (L ch), GND T301 105 kHz +3 kHz
(Primary) TP102 (R ch), GND Use METAL tape.
Minimum output
REC/PB 201 (leh) GND: | i201;L06202 Use METAL tape.
(Primary) TP202 (R ch), GND INPUT VR. minimum
VR351 35 mV .
VR352 Test tape is METAL blank tape.
REC/PB TP101 (L ch), GND VR353 20 mV
(Primary) TP102 (R ch), GND Test tape is CrOz2 blank tape.
13 mV
pica. Test tape is Normal blank tape.
560 mV
alah Vee Tape selector is METAL position.
EVEL knob : Adjust VR351 and VR352 so that the distortion becomes 1.0% — 1.4%
mV in REC/PB TP501 (L ch), GND 560 mV
tPrienaty) TP602 (R ch), GND oon Adjust VR353 so that the distortion becomes 1.3% (CrO2).
VR354 (Normal) Adjust VR354 so that the distortion becomes 1.0% (Normal).
This confiemation should be at each tape selector position.
VR353 So that the record/playback frequency resportion is flat (at least
L201, L202 within the range in Fig. b.)
TP50 (VR351, VR352) Tape selector is CrO2 position.
aire . So that the record/playback frequency resportion is flat (at least
REC/PB OUTPUT jack VR351 within the range in Fig. b.)
a VR352 Tape selector is METAL position.
VR354 So that the record/playback frequency resportion is flat (at least
L201, L202 within the range in Fig. b.)
(VR351, VR352) Tape selector is Normal position.
560 mV
ae to GND REC/PB Lea i an aN Perform adjustment using CrOz.
i 02 (R ch), Perform checking only for Normal and METAL tapes.
Load TCC-185C in SEC DECK and SCC-565 in PRI DECK and execute
high-speed copying, then play the tape in the PRI DECK. Check that
. the frequency response of the 14 kHz signal is within +3 dB of that
Covtae OUTPUT L203, L204 of the 1 kHz signal.
ORY Eray If this specification cannot be satisfied, adjust L203 and L204. After
adjustment is confirmed, also use the SCC-502 and SCC-1360 tapes
to check.
Load TCC-285C in SEC DECK and SCC-565 in PRI DECK and execute
high-speed copying, then play the tape in the PRI DECK. Check that
: the frequency response of the 14 kHz signal is within +3 dB of that
High Speed OUTPUT L203, L204 of the 1 kHz signal.
Copy Play if this specification cannot be satisfied, adjust L203 and L204. After
adjustment is confirmed, also use the SCC-502 and.SCC-1360 tapes
to check.
EVEL knob VR401 . :
dB below | REC/PAUSE PEAK LEVEL METER VR402 Adjust so the -1 dB segments light.
T jack. REC/PAUSE TP501 (L ch), GND LC501
02to GND | MP x filter TP502 (R ch), GND LC502 Adjust for -0.3 dB at 15 kHz and > 35 dB at 19 kHz
ON or OUTPUT jack

E
GENERAL UNIT
EXPLODED VIEW

GENERAL UNIT
EXPLODED VIEW
o
i;
NA
\W_!
.
a:

SECONDARY