Sanyo MR-939 - User Manual

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.

Sanyo MR-939 Specifications