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SLV-D920 B/D920 E/D920 N/D920 R/D925 E/ D930 D/D930 GI/D960P B/D960P E RMT-V503C/V503D SERVICE MANUAL AEP Model SLV-D920 B/D920 E/D920 N/D925 E/ D930 D/D960P B/D960P E UK Model SLV-D930 GI Russian Model SLV-D920 R TS-10 MECHANISM RMT-V503D SLV-D960P E Refer to the SERVICE MANUAL of VHS MECHANI- CAL ADJUSTMENT MANUAL VII for MECHANICAL ADJUSTMENTS.
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SLV-D920 B/D920 E/D920 N/D920 R/D925 E/ D930 D/D930 GI/D960P B/D960P E 3. Block Diagram A/V Common DECK ASS'Y (DP-15) SCART JACK RF/LD Control Pick-up & I/V Amp Disk Motor Feed Motor AUDIO L/R AIC2 VIC1 IC802 IC501 (PCM1752KE) (LA73054) (Bu4053) (LA72646) 2CH Audio DAC Video Amp 6CH S/W...
SLV-D920 B/D920 E/D920 N/D920 R/D925 E/ D930 D/D930 GI/D960P B/D960P E 6. ALIGNMENT AND ADJUSTMENTS 6-1 VCR ADJUSTMENT 6-1-1 Reference 1) X-Point (Tracking center) adjustment, “Head switching adjustment” and “NVRAM option setting” can be adjusted with remote control. 2) When replacing the Main PCB Micom (IC601) and NVRAM (IC605: EEPROM) be sure to adjust the “Head switching adjustment” and “NVRAM option setting”.
6-1-2 Head Switching Point Adjustment 1) Playback the alignment tape. 2) Press the “TEST” botton on VCR MAIN PCB to set the adjustment mode. (See Fig. 6-2) 3) Press the “1, 0” buttons ; remote control adjustment operates automatically. (See Fig. 6-1) 6-1-3 NVRAM Option Setting 1) NVRAM Option is adjusted in the factory.
6-2 VCR MECHANICAL ADJUSTMENT 6-2-1 Tape Transport System and Adjustment Locations The tape transport system has been adjusted precisely in the factory. Alignment is not necessary except for the following : 1) Noise observed on the screen. 2) Tape damage. 3) Parts replacement in the tape transport system.
6-2-2 Tape Transport System Adjustment When parts are replaced, perform the required adjustments by referring to procedures for the tape transport system. If there are any changes to the tape path, first run a T-120 tape and make sure excessive tape wrinkle does not occur at the tape guides. If tape wrinkle is observed at the guide roller S, T, turn the guide roller S, T until wrinkle disappears.
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b. ACE HEAD TILT ADJUSTMENT 1) Playback a blank tape and observe the position of the tape at the lower flange of tape guide. 2) Confirm that there is no curl or wrinkle at the lower flange of tape guide as shown in Fig. 6-9 (B). 3) If a curl or wrinkle of the tape occurs, slightly turn the screw (A) tilt adjust on the ACE head ass’y.
d. ACE HEAD POSITION (X-POINT) ADJUSTMENT 1) Playback the alignment tape (Color bar) 2) Press the “TEST” botton on VCR MAIN PCB to set the adjustment mode. (See Fig. 6-2) 3) Press the “0, 5” remote control buttons, then adjustment is operates automatically. (See Fig. 6-1) 4) Connect the CH-1 probe to “Envelope”...
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(2) Linearity adjustment (Guide roller S, T adjustment) 1) Playback the Mono Scope alignment tape (SP mode). 2) Observe the video envelope signal on an oscilloscope (triggered by the video switching pulse). 3) Make sure the video envelope waveform (at its minimum) meets the specification shown in Fig. 6-11. If it does not, adjust as follows : Note: a=Maximum output of the video RF envelope.
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6) Play back the Mono Scope alignment tape (SP mode). 7) Connect an oscilloscope CH-1 to the “Envelope” and CH-2 to the “H’D SW Pulse” for triggering. 8) Turn the guide roller heads with a flat head ( ) driver to obtain a flat video RF envelope as shown in Fig. 6-13. IDEAL ENVELOPE S HEIGHT TOO HIGH T HEIGHT TOO HIGH...
(4) Envelope Check 1) Make recordings on T-120 (E-120) and T-160 (E-180) tape. Make sure the playback output envelope meets the specification as shown in Fig. 6-15. 2) Play back a self recorded tape (recording made on the unit using with T-120 (E-120). The video envelope should meet the specification as shown in Fig.