Technics RS 1700 Service Manual

Page 1

ORDER NO. AFRO-78050280

Service Manual

"lsolatddLoop QuartzLocked
Direct-Drive Three-Motor Auto-
Reverse Open-Reel Tape Deck

Information:
The Service Manual for model RS-1700
is in 2 parts: Vol. 1 and Vol. 2.
Vol. 1 does not include measurements
and adjustments.
Refer to Vol. 2 for these items.

RS-1500U MECHANISM SERIES

Specifications (Catalog specifications for sales)

Operation :
Track system:
Heads ;

Motors .
Capstan ;

Reel ta ble;
Reel size:
Tape speed:

Wow and tlutter:
385m/s (15 ips);

19cm/S(7~1/2ipsll

Automatic reverse

4-week 2-channel recording, playback, erasure on both way

6 heads system

2-record/erasure combination head and 2-playback head

3 directorive motors system

Quartz control phaselocked DC brushiess servo
direct-drive motor

2rtape tension controlled DC brushless directrdrive motor

13cm to 26.5 cm (5" to 101/2") outside diameter

380m/s, 19cm/s and 9.5cm/s

(15 lps, 7-1/2 ips and 3-3/4 ips)

(recording and playback)

0 018% (WRMS). $003596 (Peak DlN)

0.03% (WRMS). i0 06% (Peak DlN)

9.5) cm/s (3»3/4 ips): 0 06% (WRMS), i0.lZ% (Peak DIN)

Speed donation;

Speed fluctuation:

Frequency response
38 cm/s (15 lps);

19cm/s (771/2ips);

t01% at 38cm/s (15 ipsl
0.05% at 38 cm/S (15 ips)

30 ~ 30,000 Hz
20 ~ 25,000 Hz

i3dB (re/3. level: - 10 dB trom OVU)
t3dB (rec leve 20dB from OVU)

9.5 cm/S (33/4 ips); 20~15,000Hz i3dB (rec. level = -20 dB from OVU)

Signal-to-noise ratio:
Recording level;
38 cm/s (15 ips);

190m/sl771/2ipsl;

Weighted (ASA-A curve) 1kHz
(3% THD) (185nWb/m+ 6 dB)
68dB 62dB

68dB 62dB

9.5 cm/s (3»3/4 ips); 67 dB 60 dB

Distortion (THD):

l
Channel separation:

= Erasing ratio:

.F'itch control:
Time counter accuracy:
Fast winding time:
Auto-reverse sensing:

Measured via tape at 400 Hz (at any speed)
Less than 0.8% (0 W)

Less than 2.0% (185 nWb/m +6dB)

Better than 50 dB

Better than 65dB (rec. level = +10dB at 1kHz)
i6% (recording and playback)

:1% at 380m/s (15 ips)

150 sec, for 762m (1,5nnil, 2500 feet) tape
Photoelectric

Auto-stop sensing:

Recording bias:
Bias level;

Equalization:
Recording level
calibration:

lnputs'
MIC;

LlNE;

THROUGH OUT.
Outputs:
LlNE;

HEADPHONE ;
Power requirements:
Power consumption.

Weight:
Dimentions (W X H XD):

Open Deck

RS-17OO

Vol. 1

Photoelectric, Tension roller switches or Takeup reel
table servo control system
1 20 kHz
BIAS selector at "1" 90%
at 2" 100%
at "3" 110%
NAB standard position 2" of EQ and "BlAS" selector
set for Scotch #207 tape

Referenced to 185nWb/m

Unbalancedphone type jack sensitivity 025 mV (-72 dB),
input impedance 4.7 KS2 (at OVU, Mic level control at
maximum position) 25 inV (- 52 dB)/4.7 KQ with
20 dB Mic.

Attenuation switch on. overload margin 55 dB (75 dB With
20 dB Mic. All.) applicable microphone impedance
4009~ 10 K9

Unbalanced phono type jack sensitivity 60 mV (-24 dB),
input impedance 1150 K9. overload margin =irntinity
(line input connected to LINE IN level control before
pass through the amplifier)

Same as LINE IN (connected in paralled to LINE IN)

2-pair oi unbalanced phone type jack output level 0.55V
at OVU (output level control at "8)

0.77SV or more at output level control maximum
output impedance less than 3 Kflload impedance 22 KS2
over

Stereo phone type jack output level 80mV at 0.55V line
output load impedance 89

AC 110/125/220/24OV. 50/60Hz

DC 24 V, 4.9A peak (with optional battery adaptor RP-086)

160W

25.7kg, (56 lbs 9 oz)

45,6cm X 44 6cm >< 25.8cm (18' X17»1/2' X10»1/8'l

Speoiications based on use of Technics RT108218 (Scotch #207) tape.
SpeCiiications are subject to change without notice.

I'Ibchnicsr

Matsushita Electric Trading Co., Ltd.

R0. Box 288, Central Osaka Japan

Page 2

LOCATION OF CONTROLS
AND COMPONENTS

® Reel damper ~. 3 ,

® ® ® @ (5) @ ® ® @ Double pinch rollers ' J

® Tape marker

® Light sensing system: Light-emitting diode
@ Tension rollers

® Light sensing system: Photo-transistor
(D Guide pins

® Capstan

® Cue lever/DC bower switch

Time counter, reset button

® Pause button

@ Rewind button

® Reverse button

@ Fast-forward button

® Forward button

69 Stop button

® Record button

® Record mode switches

® Bias selector

® Equalization selector

@ Monitor switches

@ Reversing roller

Q3 Output level controls

(3 Edit dial

® Line~input level controls

@ Preset markers

® Microphone level controls

® Microphone jack

@ Headphones lack

® Microphone attenuator switch

@ Meter scale selector

(32/ Timer start switch

® Tape speed selector

@ Power switch

® Pitch control

@ Reverse selector

@ Level meter zero-point adjustment screws
® Level meters

Stroboscope lamp

Voltage selector

® Remotercontrol connector

® Power cord holder
Battery selector
DC lN connector
® Power cord

@ Ground terminal
@ Line input jacks
Throughout" jacks
Line output jacks ,

@®@:®®©

@c

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