Zenith XBV613 Service Manual - Page 92

DECK MECHANISM ADJUSTMENT 2. Previous Preparation for Deck Adjustment (Preparation to load the VCR (VCP) with cassette tape not inserted) 1) Take the power cord from the consent. 2) Separate the top cover and the plate assembly top. 3) Insert the power cord into again. 4) Turn the VCR (VCP) on and load the cassette while push- ing the lever stopper of the holder assembly CST backward. In this case, clog both holes on the housing rail part of chassis to prevent detection of the end sensor. If doing so, proceeding to the stop mode is done. In this status, input signals of all modes can be received. However, operation of the Rewind and the Review is impossible since the take-up reel remains at stop status and so cannot detect the reel pulse (however, possible for several seconds). 3. Torque Measuring Purpose of Measuring : To measure and check the reel torque on the take-up part and the supply part that performs basic operation of the VCR (VCP) for smoothly forwarding the tape. Measure and check followings when the tape is not smoothly wound or the tape velocity is abnormally proceeded: Fixtures and tools used VCR (VCP) status Measuring method • Torque Gauge (600 g.cm ATG) • Torque Gauge Adaptor • Cassette Torque Meter SRK-VHT-303 • Play (FF) or Review (REW) Mode • Try to operate the VCR (VCP) per mode with the tape not inserted (See '2. Prior Preparation for Deck Adjustment). • Measure after adhering and fixing the torque gauge adaptor to the torque gauge (Fig. C-3-1) • Read scale of the supply or take-up part of the cassette torque meter (Fig. C-3-2). Item Mode Fast forward Torque Fast Forward Rewind Torque Rewind Play Take-Up Torque Play Instruments Torque Gauge Torque Gauge VHT-303 Reel Measured Take-Up Reel Supply Reel Take-Up Reel Measuring Value More than 400g°cm More than 400g°cm 40~100g°cm Review Torque Review VHT-303 Supply Reel 120~210g°cm NOTE Adhere the torque gauge adaptor to the torque gauge for measuring the value. • Torque Gauge (600g.cm ATG) • Cassette Torque Meter (SRK-VHT-303) Torque Gauge Torque Gauge Adaptor Reel Table Fig. C-3-1 SRK -VH T- S 300 250 200 0 50 1V5HM0TTCE-O3ATR0ES3QVRSIUESDETERTOEK SRK - V H T 0- T 50 100 150 200 250 300 Fig. C-3-2 4-14