Sanyo VHR-220 series - Page 3

3503.J1 l(N)
2. ELECTRICAL ADJUSTMENT
2-1. PREPARATION
2-1-1. EQUIPMENT
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Colour lV monitor
PAL Colour-bar generator (with RF and LINE OUTPUT)
Audio signal generator
Oscilloscope (dual trace; frequency response: 10MHZ or
more; probe: 10:1 )
Frequency counter (countable to 10MHZ or higher)
Digital voltmeter
AC voltmeter
In/output probes
Alignment cassette (VHJ-0008) PAL Colour bar 1KHz
Alignment cassette (VHJ-0009) Monoscope 6KHz
Alignment cassette (VHJ-0051 ) Check for D.O.C.
Alignment cassette (VHJ-0023) PAL Monoscope 6KHz,
PAL Colour-bar 1KHz, SECAM Colour-bar 1KHz, PAL RF
Sweep MESECAM Colour-bar 1KHz, NTSC Colour-bar
1KHz.
Relay jig (VHJ-0065) 5-wire cable for Pre-amp unit
Relay jig (VHJ-0084) for CP-1 and CP-2 board
Relay jig (VHJ-0085) for Video pre-amp unit
2-1-2, CONNECTING THE RELAY JIG
When repairing
CP-1
(see Figs.
2-1-2 and 2-1 -3)
NOTE: The connection of any Relay jigs can be done with-
out removing the front panel of the main unit.
1. Remove the seven red screws of the CP-1 board to take
out.
2. Insert the CP- 1 board in the slit of chassis as shown in
Fig. 2-1-3.
3. Connect CNO1 and CN02 of Relay jig (VHJ-0084) into
connectors of the PW-1 board and the Pre-amp unit, in the
direction of arrow as shown in Fig. 2-1-3. Fix the Relay jig
(VHJ-0084) with screw if necessary.
‘...-
4. Connect 12-pin, 8-pin and 4-pin connectors of the Relay
jig to connectorsCN541,CN101 and CN201 on the CP-1
board, respectively.
5. Connect connector from ACE head to CN06 of the Relay
jig (VHJ-0084).
6. After finishing the repairs and adjustments, put the Flat
cables (A) and (B) back to its former position.
When repairing the Video pre-amp unit
(see Figs. 2-1-1 and 2-1 -4)
1. Remove the Pre-amp unit from the chassis, connect
Relay jig (VHJ-0065) between the Pre-amp unit and
cylinder assembly.
2. Connect Relay jig (VHJ-0084) excepting 8-pin connector
between the PW-1 board and CP-1 board as shown in
Fig. 2-1-4. Fix the Relay jig (VHJ-0084) with screw
if
necessary.
3. Connect Relay jig (VHJ-0085) between the top of Pre-
amp unit and CN101 on the CP-1 board.
NOTE:
When repairing or adjusting the Pre-amp unit, be
sure to make contact an end of the Shield case
with Bracket of the Pre-amp unit to maintain the
shield effect. If the Pre-amp unit does not contact,
image can be obtained.
CAUTION: Be sure that the Relay jig does not have touch
with video head or the upper cylinder assem-
bly.
CN02 connectorto
CN181 of Pry-amp unit
8-pin connectorto
CN101 of CP-1 board
Relay jig VHJ-0085
Fig. 2-1-1
FoaJolo
CN06 connectorfrom
12-pin connectorto
CN02 connectorto
connectorforACEhead
>
CN541
of CP-1 board
>>...
CN181 of Pre-amp unit
+.
~Qj\
f~w
8-pin connectorto
<
-.
CN101 of CP-1 board
*.
.<..
CNO1 connector to
<
CN511 of PW-1 board
Relay jig VHJ-0084
“%?&-
4-pin connector to
CN201 of CP-1 board
I
Fig. 2-1-2
1
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