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SAN
YO
(9
Stereo Tape Recorder
moveEL MR-939
SERVICE
MANUAL
-
SANYO ELECTRIC CO., LTD.
INTERNATIONAL DIVISION:
SANYO ELECTRIC TRADING CO., LTD.
OSAKA,
JAPAN
SPECIFICATIONS
Speed
Accuracy
-++-eee+e+ +3% Standard (7-1/2, 3-3/4 or 1-7/8 ips)
Gain Balance, CH-CH
--:--- 2dB
max.
difference
(overall
record/
speed Variation +--+ 2% Max. (Start to end of reel)
play)
A) Cee
0.15% Max. 7-1/2 ips (WRMS Value)
Frequency Responce
0.20% Max. 3-3/4 ips (WRMS
Value)
Record-Play:--|
SPEED
FREQUENCY
c/s
0.30% Max. 1-7/8 ips (WRMS Value)
100. 1000 3000 5000 10000
Rewind/Fast Forward
------ Up to 2min. for 1200 ft. on 7 in. reel
aia
ace
"1/23
He
+3
Sensitibity
7-1/2 ips
=
Ee
_7
Microphone Input-.-—67 to —73 dBm for standard Rec.
3-3/4 ips
+6) 0
level on meter
4
AUX Input... —17 to —23dBm
for standard Rec.
1-7/8 ips
= 0
a
a
level on meter
SSS
Power Output (10% Dist.)---3 Watts each channel
Reel Torque (gr-cm) «----+-+-
MODE
| LEFT
| RIGHT
Cross-Talk,
Channel to Channel-.-Better than 60 dB
PLAY
| 30 - 60
| 100 - 150
Bias Frequency
Seas euceuresee 80 Ke
;
Erase Efficiency ++:-1:+--++--- At least 60 dB
REW.
| 450-550
| 40-60
Signal Noise Ratio------.-+-+: Better
than 38dB
without
Weighting
F. FOW.
|
30-60
| 500
- 700
Network
Hum and Noise
--+-------+++ 30 mV Max. Volume and Tone Max.
Pinch Roller Pressure ------ 900-1300 gr
DISASSEMBLY.
~ To Disassemble:
' Step 1. Pull off control knobs.
Step 2.
Remove
nuts of the headphone and microphone
jacks.
Step 3.
Remove
tape speed selector knob.
Step 4.
Remove
set-screws and pull off control lever.
Step 5.
Remove
head-housing.
Step 6.
Remove screws
(five) fixing front panel, and remove
panel.
Step 7.
Remove screws (two) fixing chassis to top of cabinet.
Step 8.
Remove screws (four) fixing chassis to rear of cabinet.
Remove
chassis carefully.
' ' To Reassemble:
Reverse disassembly sequence.
For
sub-disassembly
and
sub-reassembly
refer to illustrations in
replaceable parts list.
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