To Adjust Playback Level/Rec; Adjust Deck 1 Play Level; Adjust Desk 2 Play Level/ Rec Bias - JVC MX-GA8 Service Manual

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

Pre-Setup
Item
Step
Condition
SPK OUT
(VTVM is
AZIMUTH
1
connected to
the scope)

2. Adjust Desk 2 Play Level/ REC BIAS

Pre-Setup
Step Item
Condition
SPK OUT
(VTVM is con-
1
nected to the
AZIMUTH
scope)
Recording
2
Bias
Voltage
Pre-Setup
After putting MTT-
114N into Deck 1
- Press FWD PLAY
button.
Pre-Setup
After putting MTT-
114N into Deck 2
- Press FWD PLAY
button.
After putting MTT-
5512 into Deck 2
Fig 1-8
1) Press REC PLAY button.
2)TAPE PCB JCW3 ,connected
to VTVM
Standard
To Adjust
- Turn the control
screw to as shown Max output
and same phase
in Figure 1-6
(both channels)
Standard
To Adjust
- Turn the control
MAX OUTPUT
screw to as shown in
and same phase
(both channels)
Figure 1-6
CHECK TO
- Turn JSR2L,JSR2R
7mV( 0.5mV)
to the right and left
Remark
After
adjustment
secure it with
REGION
LOCK.
Remark
After adjust-
ment secure
it with
REGION
LOCK.
(No.MB080)1-23