Yamaha Portatone PSR-1500, Service Manual

Page: 19 / 162

PSR-1500/PSR-3000
19
17. VR, ENC, PNL, PNR, PNCC, DAC1A,
PNCL and PNCR Circuit Boards,
and LCD
17-1. Remove the lower case assembly. (See procedure 1.)
17-2. Remove the shield cover L. (See procedures 15-2, 3.)
17-3. Remove the shield cover U. (See procedure 16-3.)
17-4. VR Circuit Board
(Time required: About 10 minutes):
17-4-1. Remove the AM circuit board. (See procedure 16-4.)
17-4-2. Remove the volume knob from the control panel side.
(Fig. 6)
17-4-3. Remove the three (3) screws marked [460P]. The VR
circuit board can then be removed. (Fig. 7)
17-5. ENC Circuit Board
(Time required: About 10 minutes):
17-5-1. Remove the encoder knob from the control panel side.
(Fig. 8)
17-5-2. Remove the four (4) screws marked [560D]. The ENC
circuit board can then be removed. (Fig. 7)
PNR
PNCR PNCL
PNL
[560H] X 18
[560F] X 16
[560N] X 5 [560M] X 5
[560]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y(EP600250)
(Fig. 9)
Encoder knob
(Fig. 8)
This figure shows the PSR-1500.
17-6. PNL Circuit Board
(Time required: About 13 minutes):
17-6-1. Remove the AM circuit board. (See procedure 16-4.)
17-6-2. Remove the VR circuit board. (See procedure 17-4.)
17-6-3. Remove the keyboard assembly. (See procedure 13.)
17-6-4. Remove the six (6) screws marked [560E]. The two (2)
keyboard support assemblies (A) can then be removed.
(Fig. 7)
17-6-5. Remove the sixteen (16) screws marked [560F]. The PNL
circuit board can then be removed. (Fig. 9)
17-7. PNR Circuit Board
(Time required: About 13 minutes):
17-7-1. Remove the ENC circuit board. (See procedure 17-5.)
17-7-2. Remove the DJK circuit board. (See procedures 16-5, 6.)
17-7-3. Remove the keyboard assembly. (See procedure 13.)
17-7-4. Remove the six (6) screws marked [560G]. The two (2)
keyboard support assemblies (B) can then be removed.
(Fig. 7)
17-7-5. Remove the eighteen (18) screws marked [560H]. The
PNR circuit board can then be removed. (Fig. 9)
17-8. PNCC Circuit Board
(Time required: About 9 minutes):
17-8-1. Remove the keyboard assembly. (See procedure 13.)
17-8-2. Remove the AM circuit board. (See procedure 16-4.)
17-8-3. Remove the six (6) screws marked [560I]. The PNCC
circuit board can then be removed. (Fig. 7)
17-9. DAC1A Circuit Board (PSR-3000)
(Time required: About 9 minutes):
17-9-1. Remove the four (4) screws marked [440C]. The shield
cover DAC and DAC1A circuit board can then be
removed. (Fig. 7)
17-9-2. Remove the four (4) screws marked [D60]. The DAC1A
circuit board can then be removed. (Fig. 10)