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Good manual. Even it is an old printed manual, it is well scanned and complete, with all drawings, schematics and parts list. Very good return for the cost.
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Veramente completo, dettagliato e perfetto nella visione. Perfect, thanks!
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Fully functional usable service manual. Considering the age of the manual and device quality was better than expected
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Record/Playback Head Azimuth Adjustment Procedure: 1. Mode : REV playback
Test tape P-4-A100 (10 kHz, –10 dB)
   
Tape Speed Adjustment Procedure: Mode: FWD playback
test tape WS-48B (3 kHz, 0 dB) 47 k Ω frequency counter
level meter 47 k Ω set

+ –
set LINE OUT
+ –
LINE OUT
  
2. Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB.
  
1. Set to FWD playback mode. 2. Adjust RV801 so that the frequency counter reading becomes 2,980 ± 30 Hz. 3. Confirm that the deviation between tape top and tape end is within 3%. Playback Level Adjustment Procedure: Mode: FWD playback
test tape P-4-L300 (315 Hz, 0 dB) 47 k Ω set
L-CH peak output level R-CH peak
within 1dB within 1dB
level meter + – LINE OUT
Screw position
angle L-CH peak R-CH peak
3. Phase Check Mode : playback
test tape P-4-A100 (10 kHz, –10 dB) L-CH set 47 k Ω 47 k Ω
V + – + – H
Adjust RV151 (L-CH) and RV251 (R-CH) so that the reading on level meter meets the adjustment limits below.
oscilloscope
Adjustment Limits: LINE OUT level: –4.7±0.5 dB (0.43 to 0.48 V) Level difference between channels: within 2 dB Check that the LINE OUT level does not change even if Playback and Stop operation is repeated several times. Adjustment Location: DECK board
R-CH LINE OUT Screen pattern
Adjustment Location: [DECK BOARD] (Component side)
in phase 45° Good
90°
135° 180° Wrong
RV152 Record BIAS(L-CH) RV252 Record BIAS(R-CH)
RV151 Playback Level(L-CH)
4. Set in the FWD mode and repeat the step 1 to 3. 5. After the adjustment, lock the screw with locking compound. Adjustment Location: Record/Playback head
RV251 Playback Level(R-CH)
T351
IC305 CN352
FWD side
 
REV side
 
Adjustment screw
–5–
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