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Dear Sirs,
Thank you for the fast support, the manual does provide all necessary information to repair the radio. All schematics are in a good quality for reading.
The manual fits 100% to my requirements as a technican.
Kind regards Thomas
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the big video recorder format s-vhs many features delicate in loading system of the cassette. Such machines are no longer manufactured, it would be too expensive.
 ;
THIS MANUAL IS VERY GOOD AND VERY CLEAR
PLEASE NOTE IT DOES NOT CONTAIN THE SETUP INFORMATION TO ALIGHN THE GEARS IN THE CD MECH IT DOES SHOW ALL THE PARTS AND THEIR LOCATIONS .
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Complete service and operation manual. All schematics are there, all circuit boards AND add-on boards. Including exploded views ,component names and specifications. Also electrical and mechanical adjustment procedures are in this manual. This manual also covers the more advanced BR-S811E unit. Scan quality is fair and usable.
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High quality scan of original Service Manual. Everything´s fine!
TAPE ADJUSTMENT & CHECK TABLE
HEADPHONE BOARD - COMPONENT LAYOUT
HEADPHONE BOARD - CHIP LAYOUT
TEST CASSETTE
RECORDER MODE
MEASURE ON
ADJUST READ ON with to
ADJUST MOTOR SPEED
NORMAL SPEED SBC420 3150Hz PLAY B PLAY A 1 or 2 frequency counter 3620 check 3150Hz +/- 0.5% 3150Hz -0.8/+1.8%
LEFT RIGHT
CHECK WOW & FLUTTER
This assembly drawing shows a summary of all possible versions. For components used in a specific version see schematic diagram and respective parts list.
This assembly drawing shows a summary of all possible versions. For components used in a specific version see schematic diagram and respective parts list.
DECK A & B
SBC420 3150Hz
PLAY
1
or
2
W&F-meter
check
<0.4 % DIN
LEFT RIGHT
ADJUST AZIMUTH
DECK A & B SBC420 10kHz PLAY FWD PLAY REV # 1 or 2 mV-meter left hand screw right hand screw max. output level & left=right
LEFT RIGHT
CHECK PLAYBACK FREQUENCY RESPONSE
5852
3139 113 3447 pt2 dd wk0119
3139 113 3447 pt2 dd wk0119
DECK A & B
SBC420
PLAY
1
or
2
mV-meter
check
limits see fig.1
LEFT RIGHT
ADJUST BIAS CURRENT
HEADPHONE BOARD - CIRCUIT DIAGRAM
DECK B
1850 C1 1851 B3 1890 A3 1891 C3 1892 C3 2850 A2 2851 A3 2852 A2 2853 A2 2854 C3 5850 B1 5851 A2 5852 B2 9550 A2
SBC419A^ RECORD SBC420
5
or
6 mV-meter
3773 check
995mV 750mV +/- 1.5dB
LEFT RIGHT
CHECK OVERALL FREQUENCY RESPONSE AND DISTORTION
Inject 3mV signals 100Hz, 250Hz, 1kHz, 10kHz, 12.5kHz via 3 or 4 RECORDED CASSETTE 1 or 2 SBC419A^ or SBC420
1
# : Provision ## : Provision for ESD
2
# 9550 2850 22n 5851 2u2 HP 2852 22n 2853 100n
3
RECORD B
Note : Some values may varies, see respective parts list for correct value.
2851 22n
PLAY B
mV-meter
check
limits see fig. 2 *
A
A
1890 1 RT-01T
LEFT RIGHT RECORD B
Inject 1kHz 8.85mV via 3 or 4
SBC419A^ or SBC420 RECORDED CASSETTE
9 7 8
PLAY B
1
or
2
THD-meter
check
<3% *
LEFT RIGHT
1 2 3 1851 TC38
B
5850 2u2 2u2
4 5 6
B
SBC419A^ : 4822 397 30069 SBC420 : 4822 397 30071
# For Auto-reverse version only * If high frequencies are not within limits, decrease bias and re-measure. If distortion is too high, increase bias and re-meaure ^ Not applicable for Ferro version
level(dB)
TO AF9
1850
HP_DET
1 2 3 4
level(dB)
HP
C
HP_RIGHT HP_GND HP_LEFT
C
##1891 ##2854 RT-01T 1 FE-BT-VK-N HP
3139 118 54300...for 89620...3447 pt2 dd wk0119
8dB
6dB
8dB
8dB 10dB (HSD)
6dB
8dB 10dB (HSD)
##1892 1 RT-01T
470n
80
250 figure. 1
4k
12.5k
f(Hz)
100
250 figure. 2
4k
10k
f(Hz)
1
2
3
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