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Very quality copy of original service manual, which contains the circuit diagrams, PCB and lists of components, well as recommendation for calibration procedures of device, also everything else, that need for repair, tuning and use this oscilloscope.
All presented copies have high-resolution, so you can view all in detail.
This manual will very useful for simple owners and for repairers.
I recommend these manual, because myself is owner of Philips PM3216 and I need sometimes servicing these oscilloscope (principally calibrating).
Also, these document is an example of excellent design of technical documentation.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
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manual excelente completo , diagramas y esquemas bien presentados y buena calidad de imagen.
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muy buen manual completo de buena calidad de impresion preciso y detallado , muy útil para la reparación.
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The service manual is a good quality scan of the Panasonic NV-850, which is electrically identical to the Philips VR 6920, but mecanically just nearly.
SECTION 4 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured alcohol-moistened swab : record/playback/erase head pinch roller rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustment. 4. After the adjustments, apply suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement
Mode Forward Torque meter CQ-102C Meter reading 30 to 65 g � cm (0.42 to 0.90 oz � inch) DECK A : 1 to 6 g � cm (0.014 to 0.083 oz � inch) CQ-102C DECK B : 2 to 9 g � cm (0.028 to 0.125 oz � inch) CQ-102RC 30 to 65 g � cm (0.42 to 0.90 oz � inch) 1 to 6 g � cm (0.014 to 0.083 oz � inch) 70 to 120 g � cm (0.97 to 1.67 oz � inch)
SECTION 5 ELECTRICAL ADJUSTMENTS
PRECAUTION
1. The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.) 2. The adjustments and measurement should be performed for both L-CH and R-CH. � Switch position DOLBY NR switch : OFF DIRECTION MODE switch : A � Standard record position : Deliver the standard input signal level to input jack and set the REC LEVEL knob to obtain the standard output signal level as follows. � Record Mode�
AF OSC attenuator 10 k� set 600 � LINE IN 47 k�
+ �
level meter
Forward back tension
LINE OUT
Standard Input Level
Input terminal source impedance input signal level LINE IN 10 k� 0.5 V (�3.8 dB)
Reverse Reverse back tension FF/REW
CQ-102RC
CQ-201B
Standard Output Level
Input terminal source impedance input signal level LINE IN 10 k� 0.5 V (�3.8 dB)
Test Tape
Tape P-4-A100 WS-48B P-4-L300 Contents 10 kHz, �10 dB 3 kHz, 0 dB 315 Hz, 0 dB Use Azimuth Adjustment Tape Speed Adjustment PB Level Adjustment
0 dB = 0.775 V
Test Mode 1. While pressing the ·/FRONT (DECK A) and REC MUTING R buttons with the power off, press the U button to turn on the power. The fluorescent display tube lights up for about one second, and the test mode is set. The test mode performs the following two special functions. � Playback speed switching function Pressing the HIGH/NORMAL button switches the playback speed between standard/double speed. � Counter RESET & MEMORY function Resets the counter when recording starts. When rewound with the 0 (AMS) button after recording, stops at the point where recording started. 2. To release the test mode, turn OFF the power switch.
� 11 �
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