Pioneer T-6600/F User manual

<R42-105-O>
Sn*ice%/lon*0
STEREO TAPE DECK
T- 6600/F
T- 61o,o^ /F
<7OJO2E31T> TJIONEEfiI

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1. SPECIFICATIONS
Drive and control Center capstan drive with automatic reverse recordings
and playbacks, and automatic repetition playbacks by
sensing foil or by manual operation.
Track 4-track 2-channel stereo
4-track 1-channel mono
Recording compensation
characteristics NAB
Erasing AC system
Reel Up to 7 inches
Motor Hysteresis synchronous motor
Heads Two 4-track 2-channel heads for recording and play-
back
Two 4-track 2-channel heads for erasing
Tape speeds 7'1l2ips (19cm/s)
3-3/4 ips (9.Scm/s)
Fast winding time Approx. 1 10 seconds (1200ft/370m tape)
Wow and flutter Less than O.12% at7-1 12ips (19cm/s)
Less than Q.2O% at 3-3/4 ips (9.5cm/s)
Frequency response 30 to 20,000H2 (So to 15,000H2, 12dB) at7'1l2ips
(19cm/s)
30 to 13,000H2 at 3-3/4 ips (9.5cm/s)
SN Ratio More than 55dB
lnput Microphone .....0.3mVto240mV/50kSl
Line input 30mV to 24Vl330kQ
Output Lineoutput .....0.775Vl50kO
Headphone output 0.2mW/8O
Connector REC/P.B. DIN type
Lineinput ..... Pinjack
Lineoutput ..... Pinjack
Microphone ..... Standardjack
Headphones ..... Standardstereojack
Built-insemiconductors Transistors .....14
Diodes ........4.
Powerrequirement AC 110V, 117V, 130V, 22OV and 240V (50H2 or
60Hz)
Maximum power consumption 70VA
Overalldimensions 17"3/16(W) X 17"(H) X 7"5132(Dl (including dust
cover and foot)
437mm(W) X 434mm(H) X 182mm(D) (including
dust cover and foot)

Weight
Furnished accessories
NOTE: Specifications and the
due to improvements.
T-EiCiOO
With package 38 lb 11 oz (17.6kg)
Without package 28 lb 9 oz (13k9)
PR-T0emptyreel (easy-loadingreel) . . . . .1
Dustcover .........1
Reelcap .....2
Connectioncord.. ....2
Splicingtape.. ......1
Sensingfoil .. .......1
Cleanrngkit... ......1
Fuse(1A) ..........1
Motorpulley(50Hzor60Hz) . ........1
design subject to possible modification without notice

2. PARTS I DE NTI FICATION
SPE E D
KNOB SE LECTOR
REEL BASE
TAPE COU NTE R
AUTOMATIC
R EVE RSE SWITCH
POWE R SWITCH
RECORDING LEVEL
CoNTROL (LE FT)
LEVEL METER
M ICROPHON E
JACKS
RECORDING LEVEL
CoNTROL (R tc HT)
MODE SWITCH
REEL CAP
REC/P. B.
CON N ECTOR
LIN E VOLTAG E
SELECTOR 8 FUSE
AC POWER CORD
GROUND
REEL BASE
D IR E CTION
SELECTOR
BUTTON S
HEAD HOUSING
PAU SE LEVE R
U NCTION LEVE R
PLAYBACK LEVE L
CONTROL
RECORDING
LEVER
H EADPHON E S
JACK
LINE INPUT
JACKS
LINE OUTPUT
JAC KS
TE RM INAL

TAKE.UP BELT
MOTOR SWITCH
COU NTE R
COU NTE R
BELT
PU LLEY
TAPE COU NTE
AUTOMATIC R EVE R
SWITCH
POWE R SWITCH
E RASE H EAD
PILOT LAM PS
(R E COR DtN G)
PILOT LAM PS
POWE R
SUPPLY UNIT
MOTOR
R E C SWITCH
ASSE M BLY
MP CAPACITOR
MOTOR PU LLEY
SPE E D SE LE CTOR
ARM
DRIVE BELT
FLYWHEEL
E RASE H EAD
R ECIP.B. HEAD
CAPSTAN
PINCH COVER
REC/P.B. HEAD
POWE R
TRANSFORM E R
SPEED
SELECTOR SWITCH
PLUNGER

3. OUTLINE OF ELECTRIC CIRCUIT
Since the heads of Model T-6600 are designed
for both playback and recording operation, the
amplifier circuit is used for playback and
recording operation in forward and reverse
directions by switching the amplifier.
Fig. 1 shows the block diagram of record-
ing/playback amplifier and the bias oscillator in
case of the left-channel playback operation.
PLAYBACK CIRCUIT
1. The input signal picked up by the head
(F.R.P.H) passes through the switch (Sz-t)
and is amplified by the transistors (Q1, Q2).
2 The amplified signal which passes through
the switches (Sz-:, Sz-z) is negatively fed
back to the emitter of Q1 to compensating
for the NAB standard playback charac-
teristic. At the same time, this signal is fed
to transistor Q3 through the VOLUME
(VR:) and the switch (Sz-+ ).
3. The signal amplified by transistors Q3 and
Q4 is fed to the OUTPUT terminals. It is
also fed to transistor Q5 to drive the LEVEL
METER (VU) and to the HEADPHONE
Jack through the matching transformer.
4. The output levels at the OUTPUT terminals
and the output for headphone can be con-
trolled with the VOLUME (VRr).
Sr ' FWD -REV SW ( FWD POSITI0N )
I
FRPH
R RPil
)N
.NE
]NPUT
v tC.
PP
Sz -:
R
RECORDING CIRCUIT
With the FUNCTION TEVER set to "REC",
the switches (Sz-t ), (Sz-0) are connected to the
R side (recording).
1. The input signal which comes through the
input terminals (DIN-type connector or
LINE INPUT terminals) passes through the
switch (Sz-t ) and is amplified by transistors
(Ql, Q2).
2. The amplified input signal is negatively fed
back to the emitter of transistor Q1, through
the switches (Sz-: , Sz-z\. The .ratio of
negative feedback level is controlled by the
REC VOLUME for adjusting the sensitivity
of this stage.
3. The signal which has passed through the
REC VOLUMB and the switch (Sz-+) is
amplified by next stage (Q3, Q4) and is
negatively fed back to the emitter of tran-
sistor Q3 through Sz-s for low boost.
4. This signal is fed to the recording com-
pensator (high boost) amplifier Q6.
5. The signal for headphone output picked
up from Q4 collector and through transistor
Q5 and the matching transformer. Also
signal for line output is supplied from Q4
collector directly.
6. The recording level is checked with the
LEVEL METER (VU) connected to the
emitter circuit of transistor Q5.
:-J
ll
f wf=-
-ri
t<-
L'
Sz-z
REC.
V0tUl'4 E
PB
VOtUI,4E
(VR3)
FEH
R. EH
Fis. 1
5
Sr-s l!-- 4 5, ,
a, l-- [z l-,-------- n a. l--- aa 1,, -- 0o
O UT PUI
Sz ' REC - PB SW ( P B. POS]II0N )

7. The bias oscillator is made by push-pull
circuit of transistors Q7 and Q8. The bias
oscillator output current is fed to the erase
head (E.H.) to erase the signal recorded on
the tape. At the same time, it is supplied to
the recording head (R.P.H.) through the
switch (S t -s ) for recording bias.
SWITCHING CIRCUIT
1. With the POWER SWITCH (S t z) turned
"ON", 30V and 24Y appear on the two
secondary winding of the power trans-
former.
2. The 24 volts AC rectified by the SILICON
DIODE (Dl ) passes through the RELAY
CONTACT (RLt-+) and lights the DIREC-
TION PILOT lamp (F) indicating the for-
ward tape direction.
3. With the contact of the "REV." side of the
DIRECTION SELECTOR SWITCH (Sa)
closed, current flows through the relay and
the resistor (Ro+ ), causing the relay to
operate. The relay is held operated by the
contact RLt-+.
4. The current operates the PLUNGER through
contact RLr-s and the switch interlocked to
it switches the input to the amplifier circuit
and the ouput from the H.F. oscillator
circuit.
5. When the PLUNGER starts PLUNGER
SWITCH (Se ) shortcircuits the resistor Roo
permitting more current to flow, increasing
the magnetic attraction. After the starting
operation of the PLUNGER releases the
switch Ss, allowing the current to flow
through R6 6 , and the PLUNGER is held
without big heat.
T-EiCioo
6. When the contact of the "FWD" side of the
switch (Ss) is closed, both ends of the relay
coil are shorted causing the relay to release.
7. Since the contact point is inserted in parallel
into the switch (Sa), the same operation as
in 3 and 6 above will be performed when the
contact point is shorted by the sensing foil
affixed on the tape.
8. When the AUTOMATIC REVERSE
SWITCH (Sr + ) is set to the "OFF", the
shorting of the contact point does not affect
the relay operation.
9. The switch St is connected in series with the
switch (Sa). .When the FUNCTION LEVER
is set to the "FAST" position, this switch
releases DIRECTION SELECTOR switch
and the contact point to prevent an auto-
matic reversal of the tape.
MOTOR CIRCUIT
1. When the tape is threaded SHUT OFF
SWITCH (St t ) is pushed on by tape. With
the FUNCTION LEVER set to the "PLAY"
or "FAST" position, MOTOR SWITCH
(St o) turns on.
2. When the POWER SWITCH S12, the SHUT
OFF SWITCH Sr 1,&nd the MOTOR SWITCH
516 are closed, 100V will be supplied to the
motor.
3. With the contact of the "REV" side of the
DIRECTION SELECTOR SWITCH (Ss ) is
closed, relay will operate. The STARTING
COIL(L) of the motor changes by the opera-
tion of the relay contacts (RLr-r, RLr-z),
causing the revolution of the motor to reverse.
Fig.2
6
CONTACT
POINT

4. DISASSE M BLY
FRONT PAN E L
1. Remove the FUNCTION LEVER knob, the
PAUSE LEVER knob and the SPEED
SELECTOR knob.
2. Open the HEAD HOUSING and remove
the two screws as shown in Photo 1 and the
two screws from the reel base frames. Then,
remove the fronf panel.
3. With the front panel removed, most of the
mechanism can be inspected as shown in
Photo 2.
AMPLIFIER PANEL
1. Remove the RECORDING LEVEL control
knobs (Left and Right), the MODE SWITCH
knob, and the PLAYBACK LEVEL control
knob as shown in photo 3.
2. Remove the lock nuts and washers that
secure the shafts of the RECORDING
LEVEL control knobs (Left and Right) and
the PLAYBACK LEVEL control knob.

WOODEN BASE
1. Remove the four screws on the bottom of
the wooden base.
2. Remove the wooden base, the motor, the
plunger, the power supply P.C.B. assembly,
and the other parts can be inspected as
shown in Photo 6.
$$WIi*
Photo 5
Photo 6
T-CiCiO(f,
COVER OF AMPLIFIER CHASSIS
1. With the wooden base removed, remove the
four screws shown in Photo 7, and pull the
cover frontwards. The cover will come off
easily.
2. With the cover removed, adjustments or
replacement of the amplifier P.C.B. ass'y can
be made as shown in Photo 8.
Photo 7
Lch. Rch. osc.
UNIT
Photo I
?

T-EiEiclcl
5. TROUBLESHOOTING
I. MECHANISM
SYMPTOM POSSIBLE CAUSES REMEDY
Power cannot be supplied to
the unit.
Lamp does not come on.
( Mechanism works normally. )
Motor does not work. (TaPe
is threaded normally and the
FUNCTION LEVER is set to
the "PLAY" position.)
Capstan does not revolve.
(Motor rotates normally )
Back tension does not work
in "PLAY" operation.
Tape does not travel at
normal speed.
a. Power cord is open.
b. The fuse has blown
c. POWER SWITCH is defec-
tive.
d. Primary coil of power
transformer is open.
a. Direction lamp is not
fitted in the socket
correctly.
b. Direction lamp socket is
burnt out.
c. Direction lamp socket is
defective
d. Electric circuit is open.
MOTOR SWITCH (micro-
switch) is defective.
SHUT-OFF SWITCH is de-
fective.
MP (phase shift) capacitor
is defective.
Motor coil is not energized
(owing to defective relay
contacts).
Motor is defective (coil is
open).
a. Motor pulley setscrew is
loosened.
b. Belt is contaminated with
oil. (belt slips)
c. Belt is stretched. (loose
belt)
d. Belt is out of place.
e. Flywheel bearing metal is
short of oil.
f. Bearing metal is stuck.
b.
Auxiliary brake
defective.
Tension adjusting screw
not adjusted correctly.
a. Capstan and pinch roller
are contaminated with oil.
(slipped capstan)
b. Pinch roller is defective.
c. Pinch roller metal is
loosened.
d. Supply reel brake does not
detatch.
e. Supply reel shaft is short
of oil.
f. Supply reel shaft is stuck.
b.
c-
d.
e.
ls
a.
a. Replace
b. Replace
c. Replace
d. Replace
Retighten the lamp.
b. Replace.
c. Replace.
d. Repair the circuit.
a Replace or readjust
switch.
b. Replace or readjust
switch.
c. Replace.
d. Replace.
Replace
a. Tighten the screw with a
hexagonal wrench.
b. Wipe the belt clean with
pure alcohol.
c. Set it again.
d. Replace.
e. Lubricate or replace.
f. Replace.
a. Adjust.
b. Adjust.
a. Wipe them clean with pure
alcohol.
b. Replace.
c. Retighten.
d. Check fast forward cam
and brake pole.
e. Lubricate.
f. Replace.
the
the
9

SYMPTOM POSSIBLE CAUSES REMEDY
Fast forward operation does
not start.
DIRECTION SELECTOR
BUT'IONS operate errone-
ously.
Brake does not work.
Tape is slackened.
g. Supply reel Aux. brake
shoe is defective.
h. Supply reel clutch is
defective.
i. Take-up belt is con-
taminated with oil.
j. Take-up belt is stretched.
k. Take-up belt is out of
place.
l. Take-up reel clutch is
defective.
m. Take-up reel brake cannot
be released.
a. Take-up belt is con-
taminated with oil.
b. Take-up belt is stretched.
c. Take-up belt is out of
pIace.
d. Tension adjusting screw is
maladjusted.
e. Supply reel brake shoe is
not released.
f. Supply reel auxiliary brake
is not released.
g. Take-up reel brake shoe is
not released.
h. Tension brake is too
strong.
c.
DIRECTION SELECTOR
switch is defective.
DIRECTION SELECTOR
switch has poor contact.
Preset release switch (Ss )
is defective.
d. Contacts of relay (RL1)
are defective.
e. Coil of relay (RLt ) is
open.
f. Contact pole is shorting to
pole mounting plate.
a. Brake shoe is unstuck or
out of place.
b. Brake spring is out of
place.
c. Brake mechanism is
maladjusted.
d. Side of reel base or the
brake shoes are dirty.
a. Brake is defective.
b. Brake mechanism is
maladjusted.
c. Supply and take-up ten-
sion are not proper,
a.
b.
g. Replace. I
h. Replace reel pulley. I
i. Wipe the belt clean with
pure alcohol.
j. Replace.
k. Set it again.
l. Replace reel pulley.
m. Check fast forward cam
and brake Pole.
a. Wipe the belt clean with
pure alcohol
b. Replace.
c. Set it agein.
d. Readjust.
e. Check fast forward cam
and brake pole.
f. Check coupling condition
of brake arm and Aux.
brake arm.
g. Check fast forward cam
and brake pole.
h. Readjust the brake.
a. Repair or replace the
switch.
b. Clean its contacts or
replace.
c. Replace and readjust the
switch.
d. Replace the relay, or
replace the power supply
unit.
The same as in "d".
Readjust.
a. Fix brake shoe properly
b. Hook the spring again.
c. Readjust.
d. Wipe them
alcohol.
a. Replace.
b. Readjust.
c. Readjust or
base.
with pure
replace reel
e
f.
10

T-6EiOO
SYMPTOM POSSIBLE CAUSES REMEDY
Can not change tape speed.
FUNCTION LEVER can not
be set to "PLAY" position.
Does not work.
TAPE COUNTER does not
work.
Much mechanical noise.
Wow is noticeable.
PAUSE LEVER does
turn smoothly. not
a. Motor has much end
play.
b. Tape speed selector arm
is maladjusted.
c. Tape speed selector
stopper is maladjusted.
a. Slide stopper spring is
out of place.
b. Tape speed selector
stopper is bent.
a. Counter belt is out of
place or snapped.
b. TAPE COUNTER is
defective.
a. Motor is defective.
b. Driving belt touches tape
speed selector arm..
c. Revolving parts are short
of oil.
d. ReeI base pully ass'y is
defective.
a. Back tension is too
strong.
b. Dusty capstan.
c. Capstan surface is
scratched or deformed.
d. Dusty pinch roller.
e. Pinch roller is scratched
or deformed.
f. Pinch roller pressure is
not enough.
g, Driving belt is defective.
h. Driving belt is contami-
nated with oil
i. Flywheel ass'y is defec-
tive.
j. Motor is defective.
a. Spring is out of place.
a. Replace.
b. Readjust the arm.
c. Readjust the stopper.
Hook the spring again.
Straighten.
Set it
replace.
Replace
again
a. Replace.
b. Readjust.
c. Lubricate.
d. Replace.
a. Readjust.
b. Wipe the capstan clear
with pure alcohol.
c. Replace.
d. Wipe the roller clean
with pure alcohol.
e. Replace.
f. Readjust.
g. Replace.
h. Wipe it clean.
i. Replace.
j. Replace.
a. Hook the spring again.
a,
b
a.
b

II. ELECTRIC CIRCUITS
SYMPTOM POSSIBLE CAUSES REMEDY
The unit will not play back.
Sound is too low.
Distortion
noticeable. of sound
Drop-out sound.
Poor treble.
Poor base.
Too much hum.
Too much nolse.
a. Connecting cord is
disconnected or has poor
contact.
b. R: s is not soldered or
open.
c. If no B+ voltage on the
each stage, rectifier diode
(1S1849), power trans-
former, or resistors R r s
& Re z defective.
d. Head is open.
c. Poor contact of switches
Sr & Sz.
f. VR: & VR4 have poor
contact.
g. Muting SW (Se ) has poor
contact.
VRs or VR+ has high
resistance or has poor
contact.
Head wear out or dusty.
Transistor is defective.
a. Dr and Dz are shorted.
b. Too much input is
supplied to connected
amplifier.
The head is dirty.
b. The tape in use it too old
a. The head is dirty
Angle adjustment is
insufficient.
Equalizer is maladjusted.
a. Resistance of R+ + is
lowered.
b. Coupling capacitor or
emitter capacitor of each
transistor is defective.
a. Connecting cord is poor
connection or equipment
is froating from gtound.
b. Co t and Co s are defec-
tive.
Transistors Qt and Qz are
defective.
Resistors Rr , Rz, Rr r ,
Rl z or Rr r are responsi-
hle for noise.
a.
b.
a.
b.
c.
Check connecting cord.
Solder again or replaee.
Replace defective parts.
d. Replace.
e. Replace amplifier P.C.B.
ass'y.
f. Replace.
g. Replace.
Adjust or replace.
b. Replace or clean with
pure alcohol.
c, Replace.
a. Replace the diode.
d. Adjust the output.
a. Wipe with head cleaning
ribbon or clean with pure
alcohol.
b. Replace.
a. Wipe the head clean with
pure alcohol.
b. Readjust heads by using
Test Tape.
c. Readjust equalizer by
using Test Tape.
a. Replace R++ and just
with the Test Tape.
b. Replace defective capa-
citor.
a. Check connections and
make ground completely.
b. Replace.
Replace.
Replace defective parts.
a.
a.
b.
t2

T-CiEioo
SYMPTOM POSSIBLE CAUSES REMEDY
Occasionally noisy.
The unit does not record.
The sound is distorted and
the sound level is too low.
Does not erase,
Much crosstalk.
Recording and playback are
good, but LEVEL METER
does not deflect.
Head is magnetized.
a If noise comes out when
body is vibrated, bad
soldering or poor con-
tact.
b. Transistors of Qr and Qz
are defective.
a. Connection to LINE
INPUT and MICRO-
PHONE jacks incomplete.
b. Inside of pin jacks con-
nection are disconnected
or shorted.
c. Poor contact of switches
St and Sz.
d. Head is defective.
e. Oscillator circuit does
not work.
a. The head is dirty.
b. Bias current is not cor-
rect.
c. Recording amplifier
circuit has trouble.
d. Oscillator transformer Tz
is broken.
e. Cs r & Csz defective or
VRr & VRa are malad-
justed.
a. Erasing head is open.
b. Switches S+-l & S+-c
defective.
c. Oscillator circuit
not work. does
a. Head height
ed.
b. Tape does
smoothly.
is maladjust-
not run
LEVEL METER
defective.
VRs is maladjusted.
ls
b.
c. Demagnetize
eraser- by head
a. Solder defective points
again or replace.
b. Replace
a. Check connections
b. Check and repair the pin
jacks.
c. Replace amplifier P.C.B.
ass'Y.
d. Replace.
e. Check and repair.
a. Wipe the head clean with
pure alcohol.
b. Readjust.
c. Replace printed circit
board ass'y.
d, Replace.
e. Replace defective parts
or readjust.
a. Replace.
b. Replace.
c. Check the circuit
repair.
a. Readjust the level of
heads.
b. Readjust.
a. Replace.
b. Readjust.
and
the
13

6. AD.'USTMENTS OF MECHANISM
ADJ USTM E NT OF BAC K TE NSION AT
1) Switch the power "OFF" and fix one end of
the tape to the reel.
2) Set the FUNCTION L,EVER to the "PLAY"
position. Hook a tension gauge at the end of
the tape. Pull the gauge at a speed of about
7-712 ips (19 cm/s), and read the gauge.
Note: A thread may be used instead of tape"
3 ) When the reel hub is 2-318" (60 m/m),
normal back tension should be 2.1 oz (60 g)
to 2.8 oz (80 g).
4) If the indicated back tension is more or less
than the specified value, adjust the tension
adjusting spring. Refer to Photo 9.
Notes: o The tension adjusting spring is
secured by double nuts. Make ad-
justment of the spring after remov-
ing the upper nut.
o With the nut tightened, the back
tension will become larger; with the
nut loosened, the tension will be-
come smaller.
5 ) Repeat this adjustment several times for
right and left reels until the value of back
tension remains within the specified range.
Note: After adjustment, replace and tight-
en the upper nut and lock it with
paint so that the lower nut should
not be loosened.
NORM AL SPE E D
2+ " (6omm)
TENSION
GAUGE
Pull the tension gauge at a speed of 7%n9cm/s)
Fis. 3
ADJ USTM E NT OF TAKE -U P TE NSION AT
1) Switch the power "ON". Hook a tension
gauge at the end of the tape.
2) Set the FUNCITON LEVER to the "FAST"
position.
3 ) Pull the tension gauge until the reel stops
rotating.
4 ) When the reel hub is 2-3 18" ( 60 mm ),
normal take-up tension should be 7 .05 oz
(200 g) to 8.I oz (230 g).
5 ) If the indicated take-up tension is more or
less than the specified value, adjust the
tension by controlling the tension adjusting
screw. See Photo 10.
Notes: o If the 4O nut is loosened before-
hand, adjusting screw may be easily
moved.
o With the screw tightened, the ten-
sion will become larger; with the
screw loosened, the tension will
become smaller.
6 ) Repeat this adjustment several times for
right and left reels, until the value of the
take-up tension remains within the specified
range.
Note: After adjustment, tighten the 40
nut and lock it with paint so that
the adjusting screw should not be
loosened.
FAST FORWARD
7 " REEL
2+ " (6omm)
TENSION
GAUGE
Pull the tension gauge until the reel stops rotating
Fis.4
Photo I
7 " REEL
r4 Photo 10
\\--J

ADJUSTMENT OF BACK TENSION AT FAST
1) Switch the power "ON". Place a reel to
which the tape is fixed on the left-hand side
reel base.
2) Set the FUNCTION LEVER to the "FAST"
position. Hook a tension gauge at the end of
the tape and pull it until the reel starts
rotating
Note: Measure the back tension of the
left-hand side reel while the take-up
reel is rotating at a high speed.
3 ) When the reel hub is 2-3 18" ( 60 mm ),
normal back tension should be L 14 oz (7 S)
to 7 lLO oz (20il.
4) It the indicated back tension is more or less
than the specified value, adjust the tension
with the tension brake which is in contact
with the reel base.
Notes: o If the tension brake is pressed
harder to the reel base, the back
tension will become larger.
o Since the tape counter is loaded on
the left reel base, the contact pres-
sure of the tension brake to the left
reel base can be smaller than that to
the right reel base.
o Setting the FUNCTION LEVER to
the "STOP" position will make an
adjustment of the tension brake
easier.
5 ) Repeat this adjustment several times for
right and left reels until the value of back
tension remains within the specified range.
ADJ USTM E NT OF BRAKE
1) Bend the brake pole slightly so that the
brake shoe detaches from the reel base in
"PLAY" and "FAST" operations.
2) Bend the pawl of the auxiliary brake arm so
that the auxiliary brake contacts the reel
base pulley in "PLAY" operation, and
detaches from the pulley in "FAST" opera-
tion.
3 ) Repeat this adjustment for right and left reel
bases.
4 ) The brake assembly should be adjusted as
shown in the table below.
FORWARD
T-EiEioo
Fig.5
Photo 11
Photo 12
" (6Omm)
TANSION
(- GAUGE
Pull the tension gauge
,,.!i&,
'&:
f:" M
PLAY STOP FAST ADJUSTI NG
PORTION
Brake shoe
&
Reel base
About I f 32"-
3132" (0.5-1.5
mm) apart In contact About 3132' -
1176" (1 .5-2
mm) apart Brake pole
Auxiliary
brake shoe
&
Reel base
pulley
In contact In contact About L f 32"-
L116" (0.5^,1
mm) apart
The pawl of
the auxiliary
brake arm
\\--- t5

PLAY STOP FAST ADJUSTING PORTION
Tension
brake
&
Reel base
About t f 8"^'
5176" (3-4mm)
apart
About I14"
(5 mm)
apart In contact Tension
brake
BRAKE SHOES WORKING
FAST POSITION
Photo 13
STOP POSITION
Photo 15
Photo 14
Photo 16
PLAY POSITION
L6
Photo 17 Photo 18

PINCH ROLLER PRESSURE ADJUSTMENT
1) Prepare a hexagonal wrench (40\ and a
Philips @screwdriver (med ium size ).
2) Set the FUNCITON LEVER to the "PLAY"
position. After loosening the screw @ com-
pletely, control the adjusting screw C so
that the pinch roller contacts the capstan
uniformly. Then, lock the position of the
pinch roller with the screw @ (Fig. 7).
3) Position the pinch roller shaft at almost the
center of the movable range with the shaft
hole of the pinch roller frame.
GUIDE
E
T-8i600
CAPSTAN
c sET SCREW
€) sET scREW
SLI DE
Fig.7
Fig.8
5) Change the direction of the tape traveling
several times until there is no variation
noticed in the height of the tape.
Note: Even a slight inclination of the tape
guide pole will cause a large varia-
tion in the level of the tape. Make
an adjustment very carefully,
TAPE
POLE
t
PINCH ROLLE
FRAME PINCH ROLLER
SHAFT Fis. 6
ADJUSTMENT HEIGHT LEVEL OF TRAVELING TAPE
The height level of the tape traveling should not
vary with respect to the head when the tape is
moving at the normal speed in either forward or
reverse direction. When the pinch roller assemb-
ly has been replaced or the contact pressure of
the pinch roller has been adjusted, check the
height of traveling tape by the following steps.
1) Run the tape at a normal speed, 7-tl2 ips
(19 cm/s) or 3-314 ips (9.5 cm/s).
2) Change the directions of the tape traveling
from forward to reverse or vice versa, and
see if the height of the tape varies with
respect to the head.
3 ) If any change of the height is noticed, adjust
the perpendicularity of the tape guide pole.
4) Adjustment of the height of the tape should
be made as suggested in the following table.
PINCH ROLLER
CAPSTAN
TAPE GUIDE
POLE D
I
I
I
_1_
I
Direction of tape
traveling Adjustment Adjusting portion Displacement of tape
travel
Forward Tape guide pole DTilt the pole
frontward Lower
Tilt the pole
backward Rises
Reverse Tape guide pole E
Tilt the pole
frontward Lowers
Tilt the pole
backward Rises
t7

ADJUSTMENT OF PLAY IN PAUSE LEVER
1) Prepare a Philips @ screwdriver (medium
size)
2) Set the FUNCTION LEVER to the "STOP"
position.
3) Move the PAUSE LEVER frontward lightly
and check the end play in the LEVER.
4) Loosen the adjusting screw and move the
PAUSE LEVER fixture to adjust the gap
between the PAUSE LEVER fixture and the
PAUSE CAM LEVER.
HEAD LEVEL ADJUSTMENT
LEFT SIDE HEAD
1) Run a transparent tape in the forward
direction.
2) Adjust the level of the recording/playback
head so that the top edge of the head core
may be slightly (0.0015"/0.0375 mm) below
the top edge of the tape.
3) Adjust the level of the erase head so that the
top edge of the head core may be slightly
(0.0112"/0.2875 mm) above the top edge of
the tape.
4) Adjust the level of the recording/playback
head with screws A and B. Adjust the level
of the erase head by loosening nuts A and B.
5 ) Run the tape in both directions several times
and check if the level of the head is properly
adjusted.
Fis. 9
RIGHT SIDE HEAD
1) Run a transparent tape in the reverse direc-
tion.
2) Adjust the level of the recording/playback
head so that the bottom edge of the head
core may be slightly (0.0015"/0.0375 mm)
above the bottom edge of the tape.
3) Adjust the level of the erase head so that the
bottom edge of the head core may be
slightly (0.0112"/0.2875 mm) below the
bottom edge of the tape.
4) Adjust the level of the recording/playback
head with screws A and B. Adjust the level
of the erase head by loosening nuts A and B.
5) Run the tape in both directions several times
and check if the level of the head is properly
adjusted.
The head core is The head core
slightly seen above is slightly below
the top edge of the the top edge of Tape guide
tape. the tape. pole E
Tape guide /
The head core is
pole Dslightly above the
bottom edge of
the tape.
The head core is slightly
seen below the bottome
edge of the tape.
Fis. 10
PAUSE LEVER
NUTS A,B
R.P. HEAD R.P. HEAD
Fis. 11

T-Ci600
H E AD TI LT ADJ USTM E NT
1) Adjust the tilt of the head so that the tape
may eontact the front surface of the tape
uniformly.
2) Adjust the tilt of the recording/playback
head with serews A and B, and the erase
head by loosening nuts A and B.
Fis.12
SCREW C
SCREW BSCREW A
l9