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The purchased manual is an high quality scan of the original Philips paper-based Service Manual. I am very satisfied!
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The purchased manual is an scan of the original Panasonic paper-based Service Manual. Unfortunately the contrast is not perfect, but I am satisfied anyway!
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The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
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It paid to find this Service Manual, couldn't find it anywhere else. Exactly what I wanted. Received within 24 hours.
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Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
IC DESCRIPTION
IC, MSM6576-99-GS-K Pin No.
1 2 3 4 5~7 8 9 10 11 12 13 14 15, 16 17 18, 21 19, 20 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
ADJUSTMENT
Pin Name
HOLD BLS/REV MODE DOLBY SW RESET TEST1 ~ TEST3 BRAKE MOT HI MOT DIR MOT ON POP JAZZ ROCK XTB, XT VDD VSS1, VSS2 VCM, VCP VEE L. V. STOP1 L. V. STOP2 REMOTE P-SNSR BUZR MID DIS CH BASS MS IN POWER ON LED CONT F/R CTRL MUTE C-SW EJECT SW TIMING SW VDD STOP PLAY FF REW JACK IN
I/O
I I I I O O O O I I I I I I I O O O O I O O O O I I I I I I I I
Description
�H�: Normal operation, �L�: Hold key (main unit side). �H� :Endless and BLS ON, �L� :One cyde and BLS OFF. �H�: Dolby ON, �L�: Dolby OFF. Reset input terminal. Test terminal (connected to ground). �H�: Brake ON, �L� :Brake OFF. �H�: High speed, �L�: Normal speed. �H� :Clockwise direction, �L� :Counterclockwise direction. �H�: Motor ON, �L�: Motor OFF. �H�: POP ON, �L�: POP OFF. �H� : JAZZ OFF, �L� : JAZZ ON. �H� : ROCK OFF, �L� : ROCK ON. Crystal oscillator terminal. Power supply terminal. Ground terminal. Internal electronic potential generator terminal. Power supply terminal for internal logic. Reference input terminal for detection of reduce volatage stop. Signal input terminal for detection of reduce volatage stop. Key input (remote controller side). Photo sensor input. Alarm sound output. �H� :When POP mode, �L� :When not POP mode. (Not used) �H� :When DIS CH, �L� :When normal. �H� :When ROCK, JAZZ mode, �L� :When not ROCK, JAZZ mode. �H� :Exist tune, �L� :Not exist tune. �H� :Power ON, �L� :Power OFF. Method : Photo sensor LED control terminal. �H� :FWD, �L� :REV. �H� :Mute OFF, �L� :Mute ON. �H�: Exist cassette tape, �L�: Not exist. �H�: Open cassette cover, �L�: Close cassette cover. �H� :PLAY, REC PLAY, �L� :No cassette, STOP, FF, REW. Power supply terminal. Stop key input (main unit side). Play key input (main unit side). FF key input (main unit side). REW key input (main unit side). �H� :Disable remote controller key input, �L� :Able input. Setting : 1. Tape Speed Adjustment Settings : � Test tape : � Test point : � Adjustment location : � Dolby NR : � MSP : � Direction : � Tape selector :
SFR 401
A MAIN C.B
2 1
PHONES GND
2 *
J101
1
*
IC801
TP1 (R-CH) TP2 (L-CH)
2
4
VR101
*
IC101
1
3
VOLUME
* 2
Note : * : On the other side of the components.
TTA � 100 (Tape center) Phones Jack (J101) SFR401 OFF CLASSIC FWD NORM
Procedure : Short the patterns via solder as showen in the table so that the Dolby NR level is 24.5mV ± 1.0dB. Adjust so that the specifications are satisfied in both the forward and reverse directions. Connect 10µF /16V coupling capacitors between test points and test equipment (connect the positive terminals to the test points). SOLDER PATTERN 1 � 4 STANDARD : 24.5 mV ± 1.0 dB SHORT
1
� Volume : MAX Play back the test tape and adjust SFR401 so that the frequency becomes 3015Hz ± 10Hz. Then confirm WOW is less than 0.55%.
OPEN + +1dB +1.5dB +2.5dB +1dB +1.5dB +2.5dB
2. Dolby Level Adjustment � Test tape : � Test point : � Direction : � Tape selector : � Dolby NR : � Volume : � Adjustment points : TTA � 200 TP1(Rch),TP2(Lch),GND FWD NORM OFF MIN "0" Soldered patterns 1 � 4 Lch
only
3
only 1 and 3 2 only only 2 and 4
4
Rch
-6-
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