Samsung MAX-610 Service Manual page 21

6-2 Cassette Deck
Block
TAPE IC JIC1
(BA3442AKS)
BIAS OSC
µ-com UIC1
VF DISPLAY
Samsung Electronics
Main Function
Convert of P/B & R/P SIGNAL
& DECK OUTPUT OF IC
AMPS
Oscillate RECORD BIAS (105KHz)
Oscillate RECORD BIAS (105KHz)
Control DECK MECHA
Control VF DISPLAY
Control MUTE circuit
Control each circuit
Drive VF DISPLAY
Check Point
Check for voltage at pin32
1 P/B Deck : L
2 P/B DECK : H
Check for pin 24 of FIC3 when deck operates
Check for voltage at pin 28
When between songs : High (Normal)
When playing song : Low (Normal)
TP2 check
Osc Frequency : 105KHz
When inoperative : Check LQ4,LQ5
DQ1,1R,Gate check
Mode DQ1L/1R
REC
PLAY
Check for RESET
When power is turned ON
Check VF DISPLAY
Troubleshooting
-10V
1.4V
6-5