Samsung MM-ZJ6 Service Manual - Page 4

Alignment and Adjustments 2. Cassette Deck Alignment and Adjustments 2-1. To Adjust Tape Speed Notes 1) Measuring tape: i) MTT-111 (or equivalent) (Tapes recorded with 3kHz) ii) MTT-5512 (or equivalent) 2) Connect the SPK OUT of the MAIN PCB to the frequency counter as in figure 1-5. MAIN PCB Frequency Counter SPK OUT Figure 1-5 output Step Item 1 NOR SPEED Control Pre-Setup Condition SPK OUT (connected to the frequency counter) Pre-Setup 1) Deck :MTT-111 2) Press PLAY SW button To Adjust Fixed Standard Remark 3KHz ±1% range Recording /Play head AZIMUTH control screw (RVS Play) AZIMUTH control screw (FWD Play) Figure 1-6 MAIN PCB SPK OUT VTVM Oscilloscope (GND) In Out Figure 1-7 2-2. To Adjust PlayBack Level/REC Notes 1) Before the actual adjustment, clean the play/recording head. 2) Measuring tape : i) MTT-114N(or equivalent 10kHz AZIMUTH control) ii) MTT-5512 3) The cassette deck is connections as shown in figure 1-7. 1. Adjust Deck 1 Play Level Step Item Pre-Setup Condition Pre-Setup After putting MTT- SPK OUT 114N into Deck 1 1 AZIMUTH (VTVM is - Press FWD PLAY connected to button. the scope) To Adjust - Turn the control screw to as shown in Figure 1-6. Standard Remark Max output and same phase (both channels) After adjustment secure it with REGION LOCK. 2. Adjust Deck 2 Play Level/ REC BIAS Step Item Pre-Setup Condition Pre-Setup SPK OUT After putting MTT- 1 (VTVM is con- 114N into Deck 2 AZIMUTH nected to the scope) - Press FWD PLAY button. To Adjust - Turn the control screw to as shown in Figure 1-6. Standard Remark MAX OUTPUT and same phase (both channels) After adjustment secure it with REGION LOCK. Audio OSC. SET (MAIN PCB) VTVM Oscilloscope IN AUX IN TP SPK OUT IN OUT Figure 1-8 2 Recording Bias Fig 1-8 Voltage After putting MTT- 5512 into Deck 2 1) Press REC PLAY button. 2) TAPE PCB JCW3 ,connected - Turn JSR2L,JSR2R to the right and left to VTVM CHECK TO 7mV(±0.5mV) 1-2 Samsung Electronics